User Manual
Contents
1. 20 PX200 V100 100 INV Inverting 100V Figure 7 Bridged configuration for obtaining 200 V 13 Overload Protection The Shutdown indicator will illuminate during a shutdown caused by a current overload or if the amplifier overheats as a result of excessive ambient temperature poor air flow or fan failure During shutdown the amplifier output current is limited to a few mA and may float to the high or low voltage rail if the load impedance is high or capacitive When the amplifier is turned on the overload protection circuit is engaged by default and will take approximately three seconds to reset In addition to the internal shutdown triggers the output stage of the amplifier can also be disabled by applying a positive voltage to the external shutdown connector 2V to 12V The impedance of the external shutdown input is approximately 2 5 kQ 13 14 Output Connection Diagram The actuator can be connected to the amplifier by either two 4mm banana plugs a LEMO 00 coaxial connector or a 2 way LEMO OB connector The LEMO OB connector is recommended in high power applications Preassembled LEMO cable assemblies are available from www PiezoDrive com The mating plug for the LEMO OB connector is a 2 Way straight cable plug Ordering details and specifications are listed below These parts can be obtained directly from www mouser com Plug Crimp Terminal Version Solder Tag Version Max Conductor Size Cable Collet C2. TT V5 25 100 kHz 100 kHz 100 kHz 100 kHz 56 kHz 18 kHz 5 6 kHz 1 8 kHz Peak to Peak Voltage V Figure 2 Power bandwidth versus voltage and load capacitance 200V Range 10 Frequency Hz 110 x 100 90 r 80 70 B ech 4 oe HH m 40 Peak to Peak Voltage V 20 2 3 4 10 10 10 10 10 Frequency Hz Figure 3 Power bandwidth versus voltage and load capacitance 100V Range Small Signal Bandwidth Magnitude dB Phase deg 100 150 200 250 F FE FE E E RF Fr FF 300nF 100nF 10 10 10 10 Frequency Hz Figure 4 Small signal frequency response Load Cap Bandwidth Figure 5 Small signal bandwidth versus load capacitance 3dB 10 9 Noise The output noise contains a low frequency component 0 03 Hz to 20 Hz that is independent of the load capacitance and a high frequency 20 Hz to 1 MHz component that is inversely related to the load capacitance Many manufacturers quote only the AC noise measured by a multimeter 20 Hz to 100 kHz which is usually a gross underestimate The noise is measured with an SR560 low noise amplifier Gain 1000 oscilloscope and Agilent 34461A Voltmeter The low frequency noise is plotted in Figure 6 The RMS value is 173 uV with a peak to peak voltage of 960 uV 600 7 L L L L L L L TF 400
3. 100V range the power bandwidth is doubled The RMS current for a sine wave can also be related to the average current di lav UR lems The power bandwidths for a range of load capacitance values are listed below Load Peak to Peak Voltage 200V Range Cap 10 nF 30 nF 100 nF 300 nF 1 uF 3 uF 10 uF 30 uF Table 5 Power Bandwidth versus Load Capacitance 200V Range 200 55 kHz 55 kHz 35 kHz 11 kHz 3 5 kHz 1 1 kHz 350 Hz 116 Hz 150 74 kHz 74 kHz 46 kHz 15 kHz 4 6 kHz 1 5 kHz 466 Hz 155 Hz 100 50 100 kHz 100 kHz 70 kHz 23 kHz 7 0 kHz 2 3 kHz 700 Hz 233 Hz 100 kHz 100 kHz 100 kHz 46 kHz 14 kHz 4 6 kHz 1 4 kHz 466 Hz Load Cap 10 nF 30 nF 100 nF 300 nF 1 uF 3 uF 10 uF 30 uF Table 6 Power Bandwidth versus Load Capacitance 100V Range In the above tables the frequencies limited by slew rate are marked in green while the frequencies limited by signal bandwidth are marked in blue The slew rate is approximately 35 V uS which implies a maximum frequency of In the following figures the maximum frequency periodic signal in the 200V and 100V range is plotted against the peak to peak voltage Peak to Peak Voltage 100V Range 100 100 kHz 100 kHz 100 kHz 46 kHz 14 kHz 4 6 kHz 1 4 kHz 466 Hz 75 100 kHz 100 kHz 100 kHz 62 kHz 18 kHz 6 2 kHz 1 8 kHz 622 Hz 50 100 kHz 100 kHz 100 kHz 93 kHz 28 kHz 9 3 kHz 2 8 kHz 933 Hz 35 x 10
4. 200 LF Noise uV O 1 200 600 e e e r e r E 0 5 10 15 20 25 30 35 t s Figure 6 Low frequency noise from 0 03 Hz to 20 Hz The RMS value is 173 uV or 960 uVp p The high frequency noise 20 Hz to 1 MHz is listed in the table below versus load capacitance The total noise from 0 03 Hz to 1 MHz is found by summing the RMS values that is o 4 oz ofr Load Cap Bandwidth HF Noise RMS Total Noise RMS 1 uF 88 kHz 234 uV 291 uV 3 uF 30 kHz 214 uV 275 uV 10 uF 9 3 kHz 198 uV 263 uV 30 uF 3 7 kHz 187 uV 255 uV 110 uF 1 3 kHz 183 uV 252 uV Table 7 RMS noise versus load capacitance 0 03 Hz to 1 MHz 11 10 Input and Offset Configuration The input stage is a differential amplifier with an input impedance of 27k The input signal ground is permitted to float by up to 0 6V before it is clamped to the system ground The input stage is normally non inverting however it can be configured as inverting by changing LK9 and LK10 to their B position The default jumper position is A which is marked with a white bar on PCB overlay The amplifier can be supplied with an inverting input by appending the order code with INV Input Configuration Code Link Positions Non inverting default LK9 and LK10 Both A Inverting INV LK9 and LK10 Both B Table 8 Input polarity configuration The input offset source is also configurable When LK21 is in the A position t
5. 200 amplifiers can be bolted together in a side by side two channel arrangement With the addition of rack mount handles this configuration can be mounted into a standard 19 inch rack A 19 inch rack mount kit is also available for a single amplifier 16 Warranty PiezoDrive amplifiers are guaranteed for a period of 3 months The warranty does not cover damage due to misuse or incorrect user configuration of the amplifier 16
6. PiezoDrive PX200 140 Watt Piezo Driver Manual and Specifications PiezoDrive Pty Ltd www piezodrive com Contents MN aigle Le PR TO EO t Eme 3 2 Warnings Notes EE 3 Eo CO a EE E E N E E EE E E 4 A OUP VOIt3ae e Te 5 5 O tp tC rrent 200V Range era E E E 5 o Outpu utC rrent 100V Eessen 6 HEN Sg Ee et EE 7 S 3malsignal e Ve A E 10 2 NORO c 11 ID inpu utand Onset COM SUI e EN 12 Te AGAIN c 12 UM NEN o MOTE mmm 13 ie MEO e AC Wie ge ms 13 14 O tp t HEESCHT 14 14 1 LEMO OB Cable Peal ON PR TOTO NT 15 14 2 LEMO OB PlU AS un Le RR E UU PTT 15 KC ENOTE E 16 eege 16 1 Introduction The PX200 is a high power low noise amplifier designed to drive unlimited capacitive loads from DC to 100 kHz The output voltage range is user selectable from 50V to 200V which provides a high degree of application flexibility In particular two amplifiers can be connected in bridge mode to provide 200V with 280 Watts of power The amplifier will deliver up to 4 Amps peak for sinusoidal operation or up to 8 Amps for pulse applications The amplifier is compact light weight and can be powered from any mains supply The output connectors include LEMO 00 LEMO OB and 4mm Banana Jacks so many commercially available piezoelectric actuators can be directly connected The PX200 is suited to a wide range of applica
7. able Diameter Strain Relief Boot LEMO OB 2 Way Straight Cable Plug LEMO FGG 0B 302 CYCZ LEMO FGG 0B 302 CLAZ AWG22 FGG OB 742 DN 3 1mm 4mm GMA 0B 035 DN 3 5 3 9mm Cable The crimp terminal plug requires a tool if this is not available the solder tag plug should be used A two conductor cable is required to connect the amplifier to a transducer A recommended cable is the Belden 8451 cable The specifications are listed below Cable Conductor Size Resistance Capacitance Outside Diameter Belden 8451 AWG22 0 64mm diameter 53 mOhms m 115 pF m core core 220 pF m core shield 3 5mm The actuator wiring diagram is shown below Female Panel Socket Actuator Male Cable Plug 14 14 1 LEMO OB Cable Preparation Taken from LEMO OB Series Cable Assembly Instructions Solder Crimp 14 2 LEMO OB Plug Assembly Taken from LEMO OB Series Cable Assembly Instructions 1 Strip the cable as above 2 Ifthe cable is shielded fold the shield back over the cable 3 Slide the strain relief collet nut 1 and collet 3 onto the cable 4 Solder or crimp the conductors onto the contacts 5 Assemble the plug 15 15 Enclosure The PX200 enclosure has a side air intake and rear exhaust These vents should not be obstructed If sufficient air flow is not available the amplifier will enter a thermal overload state as discussed in Overload Protection The PX
8. correct jumper settings may damage the amplifier The standard output voltage range is OV to 200V However the amplifier can be supplied with any of the following voltage ranges by appending the order code with the voltage range code for example the standard configuration is PX200 V200 The voltage range jumper locations are labelled LK1 to LK8 on the PCB Only three jumpers should be installed at any time Voltage Range RMS Current Code Supply GND Supply OV to 200 1 5A V200 LK1 LK8 LK7 OV to 150 1 5 A V150 LK2 LK8 LK7 50 to 100 1 5A V50 100 LK1 LK3 LK6 50 to 150 1 5A V50 150 LK1 LK5 LK7 100 to 100 1 5A V100 100 LK1 LK3 LK7 Table 1 200 Volt Range Configurations In addition to the 200V ranges described above three 100V ranges are also possible These ranges have the benefit of twice the peak and RMS current which enables higher frequency operation when driving low voltage actuators Voltage Range RMS Current Code Supply GND Supply OV to 100 3 0A V100 LK1 LK3 LK4 OV to 50 3 0A V50 LK2 LK3 LK4 50 to 50 3 0A V50 50 LK2 LK3 LK6 Table 2 100 Volt Range Configurations The jumper settings can be modified by disconnecting the amplifier from mains power then removing the top panel to access the PCB board 5 Output Current 200V Range In the 200V ranges the standard output current is 2 Amps peak and 1 5 Amps RMS This peak current is matched to the average current limit so that a sine wave can be reprod
9. he offset is derived from the on board trim pot R15 which is adjustable from zero to full scale The default configuration for LK21 is in B position where the offset voltage is derived from the front panel potentiometer The standard offset voltage range is from zero volts to full scale however for applications that require negative offset voltages LK20 can be moved from the A to B position In the B position the offset range is from 100V to full scale Offset Configuration Code Link Positions OV to 200V Range def LK20 A Position 100V to 200V Range OR2 LK20 B Position Front panel source def LK21 B Position PCB trim pot source OS2 LK21 A Position Table 9 Offset voltage source configuration 11 Gain The standard voltage gain is 20 V V However in the 100 Volt range a gain of 10 may be more convenient This can be achieved by removing LK14 and LK15 In this configuration the voltage monitor sensitivity becomes 1 10 V V 12 12 Bridged Mode In bridged mode two amplifiers are connected in series to double the output voltage range and power To obtain 200V at the load the amplifiers are configured as illustrated below Both amplifiers are configured in the 100V range and the lower amplifier is also inverting A 5V signal applied to both inputs will develop 200V at the output 100V Non inverting Signal Generator L Voltage across load 200V PX200 V100 100 lt
10. th 8 Amps peak The maximum pulse time is identical to the 200V range discussed above The output current range can be configured by disconnecting the amplifier from mains power then removing the top panel The following modes can them be obtained The amplifier can be supplied preconfigured to any current range by appending the order code with the current range code for example the 100V range and 4A current limit is PX200 V100 C4B Peak Current Code Peak Limit LK17 Overload Timer Max Pulse Time 4A C4B LK12 A Position LK16 and LK18 Out 1 ms 8A C8B LK13 A Position LK16 and LK18 In 100 us Table 4 Current limit configuration in 100V range 7 Power Bandwidth With a capacitive load the peak load current for a sine wave is lpr Zaeitt where Von is the peak to peak output voltage C is the load capacitance and f is the frequency Given a peak current limit Ju the maximum frequency is therefore f Jon V rtC However the PX200 is protected by both peak and average current limits The average current Ja is defined as the average positive or negative current For example for a sine wave 1 p Lyk k Lays L sin 0 d0 2 5 cos av al pk on lo T Therefore for a sine wave Jan Ipg T Since the average current limit is Iay 0 7 in the 200V range the maximum frequency sine wave or power bandwidth of the PX200 is equal to The above result is true for any periodic waveform such as triangular signals In the
11. tions including electro optics ultrasonics vibration control nanopositioning systems and piezoelectric motors 2 Warnings Notes This device produces hazardous potentials and should be used by suitably qualified personnel under the supervision of an observer with appropriate first aid training Do not operate the device when there are exposed conductors High Voltage 3 Specifications Output Voltage Ranges RMS Current Peak Current Gain Slew Rate Signal Bandwidth Power Bandwidth Max Power Offset Load Noise Overload Analog Outputs Analog Input Output Connectors Power Supply Environment Dimensions Electrical 50V to 200V 100V 50V to 150V 1 5 Amps 3 Amps in 100V range 2 Amps 4 Amps or 8 Amps 20 V V 35 V us 390 kHz 55 kHz 200 Vp p sine wave 140 W Dissipation OV to Full Range with front panel adjustment Stable with any load 270 uV RMS 10uF Load 0 03 Hz to 1 MHz Thermal and over current protection Voltage monitor 1 20 V V BNC Current monitor 1 V A BNC Signal input BNC Zin 27k LEMO OB and LEMO OO Sockets 4mm Banana Sockets 90 Vac to 250 Vac Mechanical O to 40 C 32 to 104 F Non condensing humidity 212 x 304 8 x 88 mm 8 35 x 12 x 3 46 in Weight 2 kg 4 4 Ib 4 Output Voltage Range The desired voltage range should be identified when ordering The following voltage ranges can be obtained with the correct combination of installed jumpers Note that in
12. uced continuously at full current However for applications that require fast step changes in voltage the amplifier can be configured in a pulse mode with 4 Amps or 8 Amps peak current limit The maximum pulse time for each mode is listed in Table 3 and plotted against current in Figure 1 The output current range can be configured by disconnecting the amplifier from mains power then removing the top panel The following modes can them be obtained The amplifier can be supplied preconfigured to any current range by appending the order code with the current range code for example the standard configuration is PX200 C2 Peak Current Code Peak Limit LK17 Overload Timer Max Pulse Time 2A C2 LK11 B Position LK16 and LK18 Out 1 ms 4A C4 LK12 B Position LK16 and LK18 In 200 us SA C8 LK13 B Position LK16 and LK18 In 100 us Table 3 Current limit configuration in 200V range Standard s t t t s t r ar oq o Pulse Mode 2A Limit M SINE E SEE SENE TE 255 EE Sa T m 2 S 2b a 2 A ab Wu S L nster A Dee H a a ere ch 0 P r r i id es 0 1 2 3 4 5 6 7 8 Peak Current A Figure 1 Maximum pulse time versus current 6 Output Current 100V Range In the 100V ranges the output current can be doubled to 4 Amps peak and 3 Amps RMS For applications that require fast step changes in voltage the amplifier can also be configured in a pulse mode wi
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