CACR-02-TE1K driver Yaskawa

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Essential details：CACR-02-TE1K driver Yaskawa

Servo drive is a high-end product of modern transmission technology, which is widely used in industrial robots and CNC machining centers and other automation equipment. Especially, the servo driver used to control AC permanent magnet synchronous motor has become a research hotspot at home and abroad. Current, speed, position 3 closed-loop control algorithm based on vector control is widely used in AC servo driver design. Whether the speed closed-loop design in this algorithm is reasonable or not plays a key role in the whole servo control system, especially in the performance of speed control.

servo drives (servo drives) is also known as “servo controller”, “servo amplifier”, is used to control the servo motor is a controller, its role is similar to the frequency converter acting on the ordinary AC motor, belongs to a part of the servo system, mainly used in high precision positioning system. Generally, the servo motor is controlled by position, speed and torque in three ways to achieve high precision positioning of the transmission system. At present, it is a high-end product of transmission technology.

CACR-02-TE1K

In the speed closed-loop of servo driver, the real-time speed measurement accuracy of motor rotor is very important to improve the dynamic and static characteristics of the speed control of the speed loop. In order to find the balance between measurement accuracy and system cost, incremental photoelectric encoder is generally used as the speed measurement sensor, and the corresponding speed measurement method is M/T. Although M/T tachometer has certain measuring accuracy and wide measuring range, it has its inherent defects, including: 1) at least one complete code disk pulse must be detected in the measuring period, which limits the minimum measurable speed; 2) It is difficult for the timer switches of the two control systems used for speed measurement to maintain strict synchronization, and the accuracy of speed measurement cannot be guaranteed in the measurement occasions with large speed changes. Therefore, it is difficult to improve the performance of servo driver speed following and control by using the traditional speed loop design method.

Principle of servo driver: At present, the mainstream servo driver adopts digital signal processor (DSP) as the control core, which can realize more complex control algorithm, and realize digitalization, networking and intellectualization. Power devices generally use intelligent power module (IPM) as the core design of the drive circuit, IPM internal integrated drive circuit, and has overvoltage, overcurrent, overheating, undervoltage and other fault detection protection circuit, in the main circuit also added soft start circuit, in order to reduce the impact of the start process on the driver.

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