According to the inverse piezo effect, piezo actuators will produce micro displacement under the action of electric field. At present, the commonly used piezo drive controller mainly adopts the voltage drive control mode. According to the principle that the piezo actuator displacement and the voltage at both ends are approximately linear, so the displacement can be precisely controlled by controlling the voltage at both ends.
The piezo drive controller can be divided into low voltage controller and high voltage controller (-20V~150V) according to the output voltage. Low voltage controller is suitable for driving single actuator sheet and piezo stacks, the high voltage controller (-500V~1500V) is suitable for driving high voltage stacked actuator and MFC piezoelectric fiber actuator sheets.
Macro Fiber Composite
MFC is an advanced actuator and sensor, providing high performance, high flexibility and high reliability. When MFC is used as the actuator, the displacement can reach a hundred or hundreds of microns, and the output force is up to more than 693N. When MFC is used as a sensor, the amount of charge generated is related to the vibration amplitude and frequency, and the output voltage can be several volts, or even 10V, 20V or higher, and the output current is in the microamp level.
MFCs with different sizes
When MFC is used as a sensor, it should be pasted on the surface to be measured. When the surface is deformed, the MFC will output some charge, which depends on the degree of deformation. In this process, the MFC does not need an additional power supply source.
When MFC is used as actuator, it should also be pasted on a surface, when a voltage is applied to MFC, its internal PZT will generate elongation movement, but MFC was pasted to a surface, so the MFC extension deformation is applied to the surface, which caused by bending deformation movements on the surface. In this process, the MFC needs an external driving voltage to drive, and the driving voltage of this elongated MFC ranges from -500V to 1500V.
CoreMorrow
-500V~1500V Amplifier
In order to provide corresponding driving power to MFC users, and to make the products available to customers more quickly, CoreMorrow specially developed and produced E01/E00.A -500V~+1500V high-voltage amplifiers. The product is designed, developed, produced, assembled and debugged by CoreMorrow. It has the same performance as imported products, but higher cost performance, faster delivery speed and more convenient after-sales service.
E01/E00.A high voltage amplifiers are developed and designed to drive MFCs by external analog signals. The output voltage ranges from -500V to 1500V.
Characteristics
• Output -500~+1500V
• 1 to 6 channels for choice
• Analog input control
• Bandwidth for small signal up to 10kHz
Applications
• Driving MFC
• Driving high voltage piezo stack
• Driving high voltage piezo actuator, etc.
Introduction to the Panel
The modular design of this high voltage amplifier makes the panel of each module the same. The specific interface definition is shown in the figure below.
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Green LED Off: the system is off |
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Red LED on: Over-current protection Red LED off: The system is functioning normally |
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supply, DA card, etc.) |
Attention! Dangerous! When directly measuring both ends of the OUTPUT or the supporting cable through the oscilloscope and other instruments, the output voltage range is -500V~1500V, please pay attention to the voltage measurement range of the oscilloscope and other instruments, to avoid damage to your measurement instrument!
Analog input control
E01/E00.A high voltage amplifier adopts analog signal control, and the control voltage is linear with the output voltage. The analog control signal of -2.5V~7.5V can be amplified to output voltage of -500V~1500V. The bandwidth of the amplifier is up to 3kHz.
Optional Voltage Monitoring Function
In order to provide more convenience to customers, CoreMorrow provides voltage monitoring function matching for users who need voltage monitoring function, users can choose according to their own application needs.
With product optimization and upgrading, CoreMorrow will added this function to standard configuration.
Optional 1 to 6 Channels
This high voltage amplifier is a modular combination, each module is an output channel, each module can output -500V to 1500V voltage. The number of modules is the number of channels that can output voltage. The number of channels can be selected from 1 to 6 according to the user's needs. E01 chassis is used for one to three channels, and E00 chassis is used for four to six channels.
The appearance of the 6 models of high voltage amplifiers is shown in the figure below. The difference is the number of channels. For the driving of a single MFC , the 1-channel is enough. For driving multiple MFCs and requiring separate control for each sheet, a multi-channel version can be selected.
1 channel high voltage amplifier can also be used to drive multiple MFCs simultaneously, but please make sure that the driving power is sufficient to avoid attenuation of voltage amplitude or frequency.
Technical Data
Model: E00/E01.A,-500V~1500V
Control: Analog signal
Channels: 1~6 channels optional
Analog input: -2.5V~7.5V
output voltage: -500V~1500V
Output ripple: 50mVp-p(@1μF)
Stability: <0.1%F.S./8hours
Input impedance: 100KΩ
Bandwidth: 3kHz
Small signal Bandwidth: 10kHz
Average current: 17mA@1000V、1μF
Peak current: 55mA
Over current protection: 26mA
Control input connector: BNC-50KY, female
Voltage output Connector: EGG.2B.302.CLL
Power supply: AC 220V±10%,50Hz±10%
Current limit: Short-circuited
Size for 1~3 channel: 280×175×375mm^3
Size for 4~6 channel: 500×175×375mm^3
Heat dissapation: Fan
Driving MFC by CoreMorrow high voltage amplifier
In this video, CoreMorrow E01.C1 high-voltage amplifier is used to drive the MFC type M2814P1, which is pasted on a 30cm long aluminum plate. An 800V driving voltage is applied to the MFC with E01.C1 high-voltage amplifier, and the effect is shown in the video. If we apply a higher voltage, the amplitude of the aluminum sheet will be larger.