Datasheet - STMicroelectronics
Contents
1. Ti UM0709 J User Manual STM8 128 MCKIT motor control starter kit June 2009 Introduction The STM8 128 MCKIT starter kit is an integrated system designed to provide a complete ready to use motor control application developed around the STMicroelectronics STM8 microcontroller This starter kit is particularly suited to drive 3 phase brushless motors either AC induction or permanent magnet types and demonstrates how effectively the STM8 microcontrollers can be used in real world motor control applications e Drive is based on scalar control BLDC or ACIM for three phase motors e Position and or speed measurement is implemented using Hall sensors or a tachometer e Sensorless control is also implemented e The inverter is driven using the PWM modulation technique The STM8 128 MCKIT starter kit can be run in various ways e Asaplug and play demo out of the box with the provided BLDC motor in sensorless speed control mode e With an AC induction motor after reprogramming the microcontroller in open loop or in speed control mode However the main advantage of the STM8 128 MCKIT is that you can use it to create your own applications and re program the STM8 microcontroller You can develop your own applications using the dedicated software libraries provided in the starter kit in conjunction with a third party IDE and C compiler This manual describes e The STM8 128 MCKIT starter kit components and how to set2. Present JP11 Present between 2 3 JP12 Present between 1 2 1P13 Present between 1 2 to configure the HW for the DAC functionality Or present between 2 3 to configure the HW for the dissipative brake JP14 Not present Note The jumper settings that are different from the silk screen printing are highlighted in the Table 4 MB459B power board jumper settings for an AC induction motor and Table 5 STM8 eval board jumper settings for an AC induction motor 3 6 Power supply connections J1 connector of power board MB459B provides a completely independent control of the DC bus voltage power and the 15 V supply for the gate drivers This is interesting for development purposes when one needs to smoothly increase the motor s operating voltage from zero while the gate drivers are operating with their nominal supply When supplying the power stage with an external 15 V power supply using the J1 connector special care must be taken that 1 No jumpers are connected on jumper W1 2 The short circuit that replaces the D3 diode footprint must be open This is to avoid having reverse current in the L7815 voltage regulator Doc ID 15774 Rev 2 13 22 BLDC daughterboard MB843 UM0709 4 4 1 Note Note Note 14 22 BLDC daughterboard MB843 Features The BLDC daughterboard MB843 is an extension of the STM8 128 EVAL evaluation board MB631 required to implement the BLDC drive It includes e A BEMF detection network e A c
3. are sold pursuant to ST s terms and conditions of sale Purchasers are solely responsible for the choice selection and use of the ST products and services described herein and ST assumes no liability whatsoever relating to the choice selection or use of the ST products and services described herein No license express or implied by estoppel or otherwise to any intellectual property rights is granted under this document If any part of this document refers to any third party products or services it shall not be deemed a license grant by ST for the use of such third party products or services or any intellectual property contained therein or considered as a warranty covering the use in any manner whatsoever of such third party products or services or any intellectual property contained therein UNLESS OTHERWISE SET FORTH IN ST S TERMS AND CONDITIONS OF SALE ST DISCLAIMS ANY EXPRESS OR IMPLIED WARRANTY WITH RESPECT TO THE USE AND OR SALE OF ST PRODUCTS INCLUDING WITHOUT LIMITATION IMPLIED WARRANTIES OF MERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION OR INFRINGEMENT OF ANY PATENT COPYRIGHT OR OTHER INTELLECTUAL PROPERTY RIGHT UNLESS EXPRESSLY APPROVED IN WRITING BY AN AUTHORIZED ST REPRESENTATIVE ST PRODUCTS ARE NOT RECOMMENDED AUTHORIZED OR WARRANTED FOR USE IN MILITARY AIR CRAFT SPACE LIFE SAVING OR LIFE SUSTAINING APPLICATIONS NOR IN PRODUCTS OR SYSTEMS WHERE FAILURE OR MALFUN
4. custom application 6 Creating your custom application The main benefit of the STM8 128 MCKIT starter kit is that you can use it to create your own applications and reprogram the STM8 microcontroller In the toolkit you have the source files for BLDC and AC induction motors and the STM8 standard library They are intended to provide a sound basis for your own application developments Do not hesitate to fine tune them to suit your specific requirements These libraries are provided with ST Visual Develop v 4 1 1 workspaces compatible with Cosmic compiler v 4 2 7 You can set up your workspace manually for any other toolchain ky Doc ID 15774 Rev 2 19 22 Additional information UM0709 Appendix A Additional information A 1 A 2 A 3 A 4 20 22 Modification of MB631 for BLDC drive It is possible to assemble the system of STM8 128 MCKIT by acquiring separately the various parts described in Chapter 3 STM8 128 MCKIT hardware setup or by replacing it with compatible hardware The control board released with the STM8 128 MCKIT marked with MB631 2 has been modified to work with the BLDC firmware It is possible to use a standard STM8 evaluation board marked with MB631 with the BLDC firmware after performing the following modifications e Remove R21 R30 R58 R59 R75 R99 and R103 e Remove pins 15 19 and 28 on the CN10 connector Recommended reading This documentation describes how to use the STM8 128 MCKIT
5. starter kit Additional information can be found in the following documents e STM8Sxxx access line and performance line datasheets STM8Sxxx reference manuals STMicroelectronics motor control application notes STM8S three phase BLDC software library v1 0 UM0708 STM8S three phase AC induction motor software library v1 0 UM0712 STM8 128 EVAL user manual UM0482 MB459B power board user manual UM0379 Most of the above documents are present on the STM3210B MCKIT CD ROM Software upgrades The latest versions of the STM8 motor control libraries are available free of charge from our sales offices Getting technical support Technical assistance is provided free to all customers For technical assistance documentation and information about products and services please refer to your local STMicroelectronics partner Doc ID 15774 Rev 2 ky UM0709 Revision history Revision history Table 7 Document revision history Date Revision Changes 12 Jun 2009 1 Initial release 22 Jun 2009 2 Added note to Section 2 1 Doc ID 15774 Rev 2 21 22 UM0709 Please Read Carefully Information in this document is provided solely in connection with ST products STMicroelectronics NV and its subsidiaries ST reserve the right to make changes corrections modifications or improvements to this document and the products and services described herein at any time without notice All ST products
6. 2 Brushless DC motor default a 7 3 3 AC induction motor S e our Goes cone Rar pani eben acirar oe odes abeeeiad 7 3 4 Hardware configuration for a BLDC motor default 8 3 5 Hardware configuration for an AC induction motor 11 3 6 Power supply connections ii xuos ome k y ur eum VA rn LANG 13 4 BLDC daughterboard MB843 sseees 14 4 1 Features 3c icteeund ep aed ii etee sng de Hees dle a NAK estes an aoe 14 4 2 ESyOUL a os PA KGAD NG md AA ALS woah eo8 S06 ated oe gr aes 15 4 3 Jumper configuration papasa bg aa RR REOR OUR UR PAA KR Or o c RU LA 16 4 4 Schematic P c 17 5 Running the starter kit annan nnnnnnnnnnnn 18 5 1 Running the BLDC motor uci err ERREREERIRX REESE ERA Rn 18 5 2 Running the AC induction motor 0c eee eee 18 6 Creating your custom application a eee eee eee 19 Appendix A Additional information cece eee eee 20 2 22 Doc ID 15774 Rev 2 ky UM0709 Contents A 1 Modification of MB631 for BLDC drive a 20 A2 Recommended reading e eee eee eee eee 20 A Software upgrades ieu s eh veu chee ats See Rae Ca hey PANG NG 20 A 4 Getting technical support 000 e eee eee 20 Revision history vcs ai a na a DE ala GU mcd ea sn 21 Doc ID 15774 Rev 2 3 22 Safety warnings UM0709 2 2 1 Note 2 2 2 3 2 4 4 22 Safety wa
7. 8 128 MCKIT CD ROM The MB631 STM8 evaluation board 2 This board is described in the STM8 128 EVAL user manual UM0482 provided on the STM8 128 MCKIT CD ROM An MB843 BLDC daughterboard 3 This board is described in the chapter BLDC daughterboard MB843 The purpose of the BLDC daughterboard is to implement the BEMF detecting network and the current regulation limitation network An STX RLink USB SWIM debugger 4 The RAISONANCE STX RLink USB JTAG debugger allows you to reprogram the Flash memory of the STM8 microcontroller and to debug the software before using the application in standalone mode A 24V DC SHINANO BLDC motor 5 The motor included in the STM8 128 MCKIT starter kit is a SHINANO inner rotor type 4 pole brushless DC motor with Hall sensor and encoder For electrical specifications and mechanical dimensions refer to the SHINANO datasheets on the STM8 128 MCKIT CD ROM Doc ID 15774 Rev 2 5 22 STM8 128 MCKIT hardware setup UM0709 6 22 e An auxiliary power supply block TR30R 6 e The following cables Motor cables 7 A motor connector HE10 34 pin cable 8 A USB cable 9 One SWIM cable and the related adapter 10 An auxiliary connector for BLDC sensorless HE10 20 pin cable 11 e A bag with three 0 1 ohm resistors is included to configure the MB459B board to increase the maximum motor nominal current level up to 5 amps e The STM3210B MCKIT CD ROM Software The STM8 128 MCKIT CD R
8. CTION MAY RESULT IN PERSONAL INJURY DEATH OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE ST PRODUCTS WHICH ARE NOT SPECIFIED AS AUTOMOTIVE GRADE MAY ONLY BE USED IN AUTOMOTIVE APPLICATIONS AT USER S OWN RISK Resale of ST products with provisions different from the statements and or technical features set forth in this document shall immediately void any warranty granted by ST for the ST product or service described herein and shall not create or extend in any manner whatsoever any liability of ST ST and the ST logo are trademarks or registered trademarks of ST in various countries Information in this document supersedes and replaces all information previously supplied The ST logo is a registered trademark of STMicroelectronics All other names are the property of their respective owners 2009 STMicroelectronics All rights reserved STMicroelectronics group of companies Australia Belgium Brazil Canada China Czech Republic Finland France Germany Hong Kong India Israel Italy Japan Malaysia Malta Morocco Philippines Singapore Spain Sweden Switzerland United Kingdom United States of America www st com 22 22 Doc ID 15774 Rev 2 ky
9. M8 128 EVAL is now ready to run with your AC induction motor Caution Before supplying the board double check proper connections make sure that there are no ky metal parts on below or around the PCB and that there are no undesired earth ground loops due to measuring equipment such as an oscilloscope Doc ID 15774 Rev 2 11 22 STM8 128 MCKIT hardware setup UM0709 12 22 Table 4 MB459B power board jumper settings for an AC induction motor Jumper Settings for AC induction motor with tachometer feedback W1 235V only or HIGH VOLTAGE W4 Not present W5 Present W6 Present W7 Not present W8 Not present W9 Not present W10 Present and soldered on reverse position of silk screen printing W11 Present W12 Present W13 Not present W14 Not Present W15 Not present W16 Present and set on reverse position of silk screen printing W17 Not present W18 Not present W19 Not present Doc ID 15774 Rev 2 a UM0709 STM8 128 MCKIT hardware setup Table 5 STM8 eval board jumper settings for an AC induction motor Jumper Setting JP1 Present between 1 2 JP2 Present JP3 Set to PSU position to supply the STM8 evaluation board through the jack CN6 JP4 Present JP5 Not present JP6 Present between 1 2 JP7 Not present JP8 Present JP9 Present if required to filter the noise from the tachogenerator signal JP10
10. OM includes the BLDC and AC induction motor software libraries When you receive the STM8 128 MCKIT the STM8 microcontroller is programmed by default with the BLDC sensorless firmware Documentation The STM8 128 MCKIT CD ROM also includes the following product documentation in PDF format e SIM8Sxxx access line and performance line datasheets STM8Sxxx reference manual STM8 128 MCKIT motor control kit user manual UM0709 the present manual STM8S three phase BLDC software library v1 0 user manual UM0708 STM8S three phase AC induction motor software library v1 0 user manual UM0712 STM8 128 EVAL user manual UM0482 MB459B power board user manual UM0379 e SHINANO motor datasheet In the box with the STM8 128 MCKIT there is also e The MCD product finder e Product flyers and brochures e The MCD miniROM e A guarantee record card Components not provided The STM8 128 MCKIT starter kit does not include e A power supply To use the STM8 128 MCKIT starter kit with the provided BLDC motor you need a 24V 3A minimum power supply e AnACinduction motor The STM8 128 MCKIT can operate with an AC induction motor The provided firmware is designed to operate with the SELNI induction motor It can be ordered as an accessory with the following order code ST7MC MOT IND To use the STM8 128 MCKIT starter kit with the Selni AC induction motor you need a 42 V DC or 32 Veff AC power supply polarity not important earth connection rec
11. W for the DAC functionality Or present between 2 3 to configure the HW for the dissipative brake JP14 Not present a Doc ID 15774 Rev 2 UM0709 STM8 128 MCKIT hardware setup Table 3 BLDC daughterboard MB843 jumper settings for a BLDC motor default Jumper Setting J1 Present and set on default position of silk screen printing J2 Present and set on default position of silk screen printing J3 Present and set on default position of silk screen printing J4 Present and set on default position of silk screen printing J5 Present and set on default position of silk screen printing SENSORLESS J13 Present and set on default position of silk screen printing VARIABLE 3 5 Hardware configuration for an AC induction motor This section describes the procedure for operating the STM8 128 MCKIT with an AC induction motor You must change the default settings that are present on the STM8 evaluation board and on the power board when you receive the STM8 128 MCKIT starter kit because they are intended for a PMSM motor When you are running the AC induction motor follow these steps 1 Remove the BLDC daughterboard MB843 from the STM8 128 EVAL evaluation board MB631 2 Remove the adapter board MB844 from the power board MB459B 3 Change the jumpers on the power board MB459B to the settings required for running with an AC induction motor Refer to Table 4 MB459B power board jumper settings fo
12. erboard MB843 and the adapter board MB844 are connected with the provided 20 pin auxiliary connector cable for BLDC sensorless see Figure 2 Verify that the BLDC motor cables are correctly plugged into the power board s MOTOR connectors J5 and J8 The power board MB459B the STM8 evaluation board MB631 and the provided BLDC motor are already assembled together over a metal support when you receive the kit Power up the STM8 evaluation board with the auxiliary power supply block TR30R Power up the power board by connecting the output terminals of your DC power supply to the MAINS connector J3 The provided voltage must be 24 V DC and your power supply must be able to provide a current of 3 A The STM8 128 MCKIT is now ready to run with the BLDC motor Doc ID 15774 Rev 2 ky UM0709 STM8 128 MCKIT hardware setup Figure 2 STM8 128 MCKIT assembly NIN Na NN Caution Before supplying the board double check proper connections make sure that there are no metal parts on below or around the PCB and that there are no undesired earth ground loops due to measuring equipment such as an oscilloscope Caution Be sure that the STM8 128 EVAL used is marked with MB631 2 or with MB631 in the second case you must also check the required modifications reported in the Appendix Section A 1 Modification of MB631 for BLDC drive Note Not all the default positions of the jumper are coincident with the silk screen printing T
13. he jumper settings that are different from the silk screen printing are highlighted in the Table 1 MB459B power board jumper settings for a BLDC motor default and Table 2 STM8 evaluation board jumper settings for a BLDC motor default Doc ID 15774 Rev 2 9 22 STM8 128 MCKIT hardware setup UM0709 10 22 Table 1 MB459B power board jumper settings for a BLDC motor default Jumper Setting for the SHINANO 24V Setting for a high voltage BLDC motor provided BLDC motor W1 lt 35V only lt 35V only or HIGH VOLTAGE W4 Not present W5 Present W6 Present W7 Not present W8 Not present W9 Not present W10 Present and soldered on reverse position of silk screen printing W11 Present W12 Not present W13 Not present W14 Present W15 Not present W16 Present and set on reverse position of silk screen printing W17 Not present W18 Not present W19 Not present Table 2 STMB8 evaluation board jumper settings for a BLDC motor default Jumper Setting JP1 Present between 1 2 JP2 Present IHA Set to PSU position to supply the STM8 evaluation board through the jack CN6 And set to DTB position to supply the BLDC daughterboard MB843 JP4 Present JP5 Not present JP6 Present between 1 2 JP7 Not present JP8 Present JP9 Not present JP10 Present JP11 Present between 2 3 JP12 Present between 1 2 E Present between 1 2 to configure the H
14. ictly observed Operation After disconnecting the board from the voltage supply several parts and power terminals must not be touched immediately because of possible energized capacitors or hot surfaces Important notice to users While every effort has been made to ensure the accuracy of all information in this document STMicroelectronics assumes no liability to any party for any loss or damage caused by errors or omissions or by statements of any kind in this document its updates supplements or special editions whether such errors are omissions or statements resulting from negligence accident or any other cause Doc ID 15774 Rev 2 ky UM0709 STM8 128 MCKIT hardware setup 3 3 1 3 1 1 STM8 128 MCKIT hardware setup This section provides a detailed description of the components included in the STM8 128 MCKIT starter kit It also describes the default settings for a brushless DC motor BLDC and explains how to change them to use an AC induction motor Package checklist Figure 1 shows the layout and connections of the major components of the STM8 128 MCKIT starter kit Figure 1 STM8 128 MCKIT layout STX RLINK USB SWIM DEBUGGER MOTOR CONTROL POWER BOARD MB459B TR30R AC DC Power Adapter Hardware The STM8 128 MCKIT starter kit includes the following items The MB459B power board 1 This board is described in the MB459B power board user manual UM0379 provided on the STM
15. itation Jumper J4 Jumper J3 Jumper J2 Jumper J1 Doc ID 15774 Rev 2 15 22 BLDC daughterboard MB843 UM0709 4 3 16 22 Jumper configuration Table 6 describes the jumpers Table 6 BLDC daughterboard MB843 jumper settings Jumper Setting Description Selects the motor neutral voltage reconstruction network Set to default position of silk PE ae Bus voltage partitioning J1 screen printing Rod to jest position B Star point reconstruction starting from the motor phases silk screen printing Configures the BEMF attenuation network Set to default position of silk Three GPIOs perform the dynamic attenuation of the BEMF ae signal this allows the sampling during off time during on screen printing J2 J3 J4 time and the dynamic selection of the two methods Set to reverse position of Fixes the BEMF signals attenuation and frees the three silk screen printing GPIOs Not present Removes the attenuation of the BEMF signals Sets sensorless or sensored configuration J5 Setio pecu Peston Obs Sets the sensorless configuration screen printing Set lo biis positon gi Sets the Hall sensor configuration silk screen printing Sets the current reference or limitation With this setting the current reference or limitation is Set to default position of silk dynamically selected by the microcontroller using a filtered J13 screen printing PWM signal Is the only configuration that allows the current regu
16. lation Set to reverse position of silk screen printing The current limitation is fixed and the potentiometer P1 is used to set this value In this case is possible to free the microcontroller PWM resource Doc ID 15774 Rev 2 a BLDC daughterboard MB843 UM0709 Schematic 4 4 BLDC daughterboard MB843 schematic Figure 4 lod enneN 6002 LL USE epson b6ejon sng pn LUizoesL uoo ASL anz p z0 asa SION VION 2 21808 Lo sseuosues YO SIONS peiosueg HO juod eeng ASG jen Sseuosueg HI 8l 201d9 asa Wo 30q UO pace ij ZXSZ JapeaH pejoedses aq isnu vue sea jo vere eDe1 oA y6 H Wo 0q uo peoe id ZXSZ 1epeeH SaN peiosueg HO lt 20149 1nduj jeuondo eDeyoA sng 2 eseud a eseud V eseud s1u002 yo id e jqeo 1e j O 10192euuoo e qw ANg zur Wr BOVLIOA SNG kr O3sv4 oir moe aasv4_6r nia v3svd sr wee 17 22 Doc ID 15774 Rev 2 Running the starter kit UM0709 5 5 1 5 2 18 22 Running the starter kit Running the BLDC motor See STM8S three phase BLDC software library v1 0 UM0708 Chapter 2 Running the demo program Running the AC induction motor See STM8S three phase AC induction motor software library v1 0 UM0712 Chapter 2 Running the demo program Doc ID 15774 Rev 2 ky UM0709 Creating your
17. n but only the first is implemented by the firmware Even if bus partitioning is also performed in the power board MB459B the partitioning performed by the MB843 makes use of a voltage partitioning that allows a better resolution in the neutral voltage reconstruction The board is easily configurable to run the BLDC drive in sensorless mode or to use the Hall sensors as position speed feedback Doc ID 15774 Rev 2 ky UM0709 BLDC daughterboard MB843 4 2 Layout Figure 3 BLDC daughterboard MB843 layout OMNAALR YW Li JIPIZIIIITIITIT 3SOduNd NOI LYNTIYAI 303 AINO LL OWIQ a 2 gt gt a 1 I gt a d m 3 gt 207025 ARNTN 73 IBH VOL mi ON BOARD J8 J12 connector for the 20 pin auxiliary connector cable for BLDC sensorless This is used to provide the three motor phase voltage signals and the bus voltage signal to the daughterboard MB843 Auxiliary phase voltage connector CN2 optional input It can be used alternatively to the J8 J12 connecting directly the motor phase voltage signals using custom wire connections Using that connector you can tighten the cables with a screwdriver connecting motor phase A in the pin 1 motor phase B in the pin 2 motor phase C in pin 3 the DC bus voltage in pin 4 and the ground in pin 5 Jumper J5 sets sensorless or sensored configuration Jumper J13 sets the current reference or limitation Potentiometer P1 sets the fixed current lim
18. ommended Doc ID 15774 Rev 2 1577 UM0709 STM8 128 MCKIT hardware setup 3 2 3 3 Brushless DC motor default The brushless DC motor BLDC is a rotating electric machine where the stator is a classic 3 phase stator like that of an induction motor and the rotor has surface mounted permanent magnets In this respect the BLDC motor is equivalent to an induction motor where the air gap magnetic field is produced by a permanent magnet The use of a permanent magnet to generate a substantial air gap magnetic flux makes it possible to design highly efficient motors A BLDC motor is driven by trapezoidal currents coupled with the given rotor position The generated stator flux together with the rotor flux which is generated by a rotor magnet defines the torque and thus speed of the motor The trapezoidal currents have to be applied to the 3 phase winding system in a way that angle between the stator flux and the rotor flux is kept close to 90 to get the maximum generated torque To meet this criterion the motor requires electronic control for proper operation For acommon 3 phase BLDC motor a standard 3 phase power stage is used The same power stage is used for AC induction and BLDC motors The power stage utilizes six power transistors with independent switching The power transistors are switched in the also called six step operation AC induction motor The AC induction motor is a rotating electric machine designed to
19. onfiguration for a BLDC motor default This section describes the procedure for operating the STM8 128 MCKIT with a BLDC motor The default settings that are present on the STM8 evaluation board and on the power board when you receive the STM8 128 MCKIT starter kit are intended for a BLDC motor When you are using the BLDC motor follow these steps 1 Verify that all the jumpers on the power board MB459B are in their default position Refer to Table 1 MB459B power board jumper settings for a BLDC motor default for information on jumper settings and if necessary to the MB459B power board User Manual for the location of the jumpers on the board Verify that all of the STM8 evaluation board MB631 jumpers are in their default position Refer to Table 2 STM8 evaluation board jumper settings for a BLDC motor default for information on jumper settings and if necessary to the STM8 128 EVAL board User Manual for the location of jumpers on the board Verify that all of the BLDC daughterboard MB843 jumpers are in their default position Refer to Table 3 BLDC daughterboard MB843 jumper settings for a BLDC motor default for information on jumper settings Verify that the BLDC daughterboard MB843 is fitted on top of STM8 128 EVAL board through the CN1 and CN5 connectors see Figure 2 Verify that the adapter board MB844 is fitted on top of power board MB459B through the J4 connector see Figure 2 Verify that the BLDC daught
20. operate from a 3 phase source of alternating voltage The stator is a classic 3 phase stator with the winding displaced by 120 The most common type of induction motor has a squirrel cage rotor in which aluminum conductors or bars are shorted together at both ends of the rotor by cast aluminum end rings When three currents flow through the three symmetrically placed windings a sinusoidally distributed air gap flux generating the rotor current is produced The interaction of the sinusoidally distributed air gap flux and induced rotor currents produces a torque on the rotor The mechanical angular velocity of the rotor is lower then the angular velocity of the flux wave by so called slip velocity In adjustable speed applications AC induction motors are powered by inverters The inverter converts DC power to AC power at the required frequency and amplitude The inverter consists of three half bridge units where the upper and lower switches are controlled complementarily As the power device s turn off time is longer than its turn on time some dead time must be inserted between the turn off of one transistor of the half bridge and turn on of its complementary device The output voltage is mostly created by a pulse width modulation PWM technique The 3 phase voltage waves are shifted 120 to each other and thus a 3 phase motor can be supplied Doc ID 15774 Rev 2 7 22 STM8 128 MCKIT hardware setup UM0709 3 4 8 22 Hardware c
21. r an AC induction motor for information on jumper settings and if necessary to the MB459B power board user manual for the location of the jumpers on the board 4 Ifthe peak value of the motor phase current should be greater than 3 ampere replace the R4 shunt resistor on the power board MB459B by the 0 1 ohm resistor included in the bag delivered with the kit 5 Verify that the jumpers on the STM8 128 EVAL evaluation board MB631 are in their default position Refer to Table 5 STM8 eval board jumper settings for an AC induction motor for information on jumper settings and if necessary to the STM8 128 EVAL board user manual for the location of jumpers on the board 6 Disconnect the PMSM motor from the power board s MOTOR connectors J5 and J8 The power board MB459B the STM8 128 EVAL evaluation board MB631 and the provided PMSM motor are already assembled together over a metal support when you receive the kit 7 Connect your AC induction motor to the power board by connecting the three phases to the J5 connector and the tachometer cables to the J6 connector 8 Power up STM8 128 EVAL evaluation board with auxiliary power supply block TR30R 9 Power up the power board by connecting the output terminals of your DC power supply to the MAINS connector J3 The provided voltage must not be higher than 42 V DC or 32 Veff AC GND recommended After re programming the STM8S microcontroller with the ACIM motor control firmware the ST
22. rnings General In operation the STM8 128 MCKIT starter kit has non insulated wires moving or rotating parts when connected to a motor as well as hot surfaces In case of improper use incorrect installation or misuse there is danger of serious personal injury and damage to property All operations installation and maintenance are to be carried out by skilled technical personnel applicable accident prevention rules must be observed When the power board is supplied with voltages greater than 30 V AC DC all of the board and components must be considered hot and any contact with the board must be avoided The operator should stay away from the board as well risk of projection of material in case of components destruction especially when powering the board with high voltages The rotating parts of motors are also a source of danger The STM8 128 MCKIT starter kit contains electrostatic sensitive components which may be damaged through improper use The board s power supply must be electrically insulated before connecting any cables that link the PC to the board such as the STX RLINK or a serial cable Otherwise an earth ground loop would occur as there is no insulation board Intended use The STM8 128 MCKIT starter kit is made of components designed for demonstration purposes and must not be included in electrical installations or machinery Instructions about the setup and use of the STM8 128 MCKIT starter kit must be str
23. up the hardware to run the provided BLDC motor or an AC induction motor e How to run the STM8 128 MCKIT starter kit in standalone mode e The BLDC daughterboard MB843 For information about the STM8 microcontroller features refer to the datasheet The STM8 evaluation board features peripherals and connectors are described in the STM8 128 EVAL user manual UM0482 For information on the BLDC and AC induction motor software libraries and how to use them in motor control application development projects refer to the STM8S three phase BLDC software library UM0708 and the STM8S three phase AC induction motor software library user manual UM0712 respectively You will find these manuals and all related documentation on the STM8 128 MCKIT CD ROM Doc ID 15774 Rev 2 1 22 www st com Contents UM0709 Contents 1 Introd ction puma sete ceri e A a chem NEN EW IA TAKAW 1 2 Safety warnings paa aaa BABE Rc o cue c cR e Me eR 4 2 1 General Laos 254 6b See Eeee AY 4 2 2 Intended use PPP 4 2 3 Operation ce cheat anaana 4 2 4 Important notice tO LISBIS iile RR RR RR RRX E RR ERE RE 4 3 STM8 128 MCKIT hardware setup 5 3 1 Package checklist 4 2a zur BAKAL ANNA BEE ALE AREA see ee gkast 5 3 1 1 HardWare i 2 x KGG a te EC ERROR OR COR ORR Kk eee LAS 5 3 1 2 SA AA AA 6 3 1 3 Documentation ey uaap KAR eee hae RR Ce RR ER EY caw eee dae 6 3 1 4 Components not provided 0 cece eee 6 3
24. urrent regulation regulation network e A neutral voltage reconstruction network The board has been designed to be compatible with the voltage level applicable to the power board MB459B lt 35V only or HIGH VOLTAGE The BEMF detection network allows the following strategies of BEMF sampling e BEMF sampling during off time ST patented method e BEMF sampling during on time e Dynamic method based on the duty cycle applied For more details see the STM8S three phase BLDC software library v1 0 UM0708 For applications that require a limited range of motor speed for example if the ratio between maximum and minimum speed is below 4 it is possible to replace the BEMF detecting network with a simple resistive voltage divider The current regulation regulation network is used to adapt the signal to perform the current control in the BLDC drive Control is made possible by a special characteristic of the STM8 microcontroller See for more details the STM8S three phase BLDC software library v1 0 UM0708 The neutral voltage reconstruction network is used to reconstruct the neutral voltage also called star point of the motor in order to perform the BEMF sampling during the on time Two strategies of the neutral point reconstruction are implemented by the board e Bus voltage partitioning e Star point reconstruction starting from the motor phases It is possible to configure either method see Section 4 3 Jumper configuratio
Download Pdf Manuals
Related Search