 Test Platform with Adjustable Load Simulation Using AB Servo Drive

Ⅰ. AB servo drive: motor mutual feed drag test platform

The test system consists of four parts, the three-phase PWM rectifier, the measured AB servo driver as motor system, the load AB servo driver as motor system and the host computer, in which the two motors are connected to each other through a coupling. The measured motor  works in the motoring condition, and the load motor does in the power generation state.

The measured AB servo drive works in a speed closed-loop state, which is used to control the speed of the entire test platform. Accordingly, the load AB servo driver works in a torque closed-loop state, and the torque of the load motor is changed by controlling the current of the load motor. Simulate the load change of the motor under test, so that the mutual feed drag test platform can realize flexible adjustment of speed and torque, and complete various tests of function.

The host computer is used to monitor the operation of the entire system. According to the test requirements, it sends control instruments to two AB servo drive, receives their operation data at the same time, and save, analyze and display the data.

For this kind of test system, the high-performance vector control mode is used to control the speed and torque of the measured motor and the load equipment respectively, which can simulate the dynamic and static performance of the CNC servo drive under various load conditions, so as to complete the comprehensive and accurate test of the AB servo drive .

However, due to the use of two sets of AB servo drive, this test system is too huge to meet the requirements of portability, and the measurement of the system and circuit control are also complex and costly.

Ⅱ. Using AB servo drive: adjustable analog load test platform

The test system consists of three parts, the measured AB servo driver as motor system, the adjustable analog load and the host computer. The adjustable analog load such as magnetic powder brakes, electric dynamometers, etc., is coaxially connected to the measured motor.

The host computer and the data acquisition board control the load torque by controlling the adjustable analog load, and at the same time collect the operation data of the servo system, and save, analyze and display the data.

For this kind of test system, by controlling the adjustable analog load, it can also simulate the dynamic and static performance of the AB servo drive under various load conditions, so as to complete the comprehensive and accurate test of the AB servo drive.

However, the instrument volume of this test system is still relatively large and cannot meet the requirements of portability. Moreover, the measurement and control circuits of the system are complex and costly.