NewsCurrent Location：Products >> News>> Company News

Different of function signal generator and piezo controller for driving PZT

Update time：2021-12-21 10:35:27Clicks：1494second
Someone often consult: What is the difference between function signal generator and piezo controller? Could a function signal generator be used to drive piezo actuator? I use a signal generator to drive piezo actuator, why is there no effect? Is it broken?

In this issue, we will give you a detailed introduction to the two products of function signal generator and piezo controller in terms of parameter design and so on. I believe you will eventually get the corresponding answer.


Piezo Actuator


Before introducing the parameters, let's know about the piezo actuator for everyone.

图片

Piezo actuator is functional materials that can convert electrical energy into displacement. When the piezo crystal deforms under the action of external force, the charge proportional to the external force can be generated on the crystal surface. This phenomenon of polarized charge on the crystal surface due to the action of mechanical force is called the positive piezoelectric effect. At the same time, when the piezo crystal is placed in an external electric field, the crystal will deform due to the action of the electric field. The magnitude of the deformation is proportional to the strength of the external electric field. This phenomenon is caused by the deformation of the piezo crystal due to the action of the electric field. It is called the inverse piezoelectric effect.

All the applications of piezo actuator are based on the above-mentioned positive piezoelectric effect and inverse piezoelectric effect. The main application in the field of piezo nanopositioning is the inverse piezoelectric effect.

Piezo actuator is be approximately equivalent to capacitors in the circuit, so the control operation of the piezo actuator is also the charging and discharging operations of the capacitors.


Function Signal Generator


The function signal generator is a signal generating device that can generate certain periodic time function waveforms (sine wave, square wave, triangle wave, sawtooth wave and pulse wave, etc.) signals, the frequency range can be from a few microhertz to tens of Megahertz. In addition to testing for communication, instrumentation and automatic control systems, it is also widely used in other non-electrical measurement fields.


Piezo Controller


Piezo controller is a drive control device specially designed to drive piezo actuator. The control mode can be divided into servo mode and open-loop mode. According to actual usage, analog signal control or digital communication control can also be used. The piezo controller can also generate specific periodic time function waveforms (sine wave, square wave, triangle wave, sawtooth wave, pulse wave, etc.) signals.


Comparison of Parameters


图片

Through the comparison of the above parameters, it can be found that the parameters of the piezo controller are far superior to the signal generator in terms of driving voltage and current. Therefore, the piezo controller has a greater advantage in driving piezo actuator. It can make the piezo actuator output greater displacement and achieve faster response speed.

In addition to its advantages in parameter performance, piezo controllers are also more suitable for driving PZT piezo actuator in terms of driving principles.


Difference in Driving Principle


Because piezo actuaotr can be approximately equivalent to capacitors, the piezo controller is specifically designed with discharge circuit for driving piezo actuator to ensure the rapid discharge of piezo actuator, thereby realizing the rapid response of piezo actuator.

Function signal generator and piezo controller are two types of equipment with different functions and usage methods. For driving and controlling piezo actuator, it is recommended that you use a piezo controller specially designed to drive piezo actuator.

In summary, why do some users use a signal generator to drive piezo actuator without any effect? The main reason is that the current and voltage of the signal generator are small, which cannot provide enough energy source for the movement of piezo actuator.

In the drive control of piezo actuator, the function signal generator is often used as the external analog input source of the analog-controlled piezo controller. The internal circuit of the piezo controller uses the 0~10V analog signal from the signal generator. Amplify to 120V or higher voltage, and then output by the piezo controller to drive the piezo actuator.

图片

Therefore, piezo actuator still need a special piezo controller to drive, so as to achieve the expected displacement or vibration effect.


CoreMorrow Piezo Controller


Here is a brief list of several CoreMorrow piezo controllers suitable for driving piezo actuator and other piezo products.



E00&E01 Piezo Controller

图片
Features:
· 1 to 18 channel optional 
· Voltage: 0~>1000V
· Bandwidth: ≥10kHZ
· External analog signal control
· Optional software communication control
 

E53 Piezo Controller

图片

Features:
· 1 channel
· Voltage: 120/150V
· Bandwidth: 10kHZ
· External analog signal control
· Optional software communication control


E70 Piezo Controller

图片
Features:
· 3 channel
· Voltage: 120/150V
· Bandwidth: 10kHZ
· External analog signal control
· Optional software communication control

Products| Applications|Services|News|About CoreMorrow|Contact Us

WeChat

Sweep, get the latest information on core tomorrow

Address：1F, Building I2, No.191 Xuefu Road, Nangang District, Harbin, China

Tel：0451-86268790

Piezo · Nano · Motion

Copyright@ CoreMorrow Ltd. 黑ICP备16009173号-1