The dynamometer can also be called a dynamometer, which is generally used to test the power of the engine, and can also be used as a loading equipment for reducers and gearboxes. The electric dynamometer is composed of AC motor, pressure sensor, speed sensor, base and flange linked to the power machinery, frequency conversion speed regulation system, electric power dynamometer measurement and control instrument, etc. Electric dynamometer has high-speed, medium-speed and low-speed high-torque electric dynamometer, which can choose different dynamometers according to different speeds of the motor to test the torque, speed, and power of the motor.
The low-speed and high-torque electric dynamometer test system adopts AC frequency conversion feedback loading, and the loaded energy is fed back to the power grid through the AC load generatorTorque and rotational speed are measured directly by the torque sensorThe comprehensive measuring instrument of electricity detects current, voltage, frequency, power factor, etc.;The computer automatically detects, displays and completes data processing, reports and various curves.
Functions of low-speed high-torque electric dynamometer:
1. It has high precision and high stability, and can be tested under different load conditions
2. It has the function of data acquisition and analysis, and can record the operation data of the motor
3. In addition to testing the performance of the motor, it can also be used for load testing. It can simulate various load conditions, such as constant power load, constant torque load, etc.
Features of low-speed high-torque electric dynamometer:
1. Four-quadrant work, can provide driving torque and resistance torque, excellent loading performance: zero speed to rated speed, can maintain constant torque loading, above the rated speed to maintain constant power loading;
2. System loading drive mode: constant torque loading drive, constant speed loading drive, zero speed loading drive, constant torque loading drive, fixed parameter loading drive, computer loading drive (such as cyclic reciprocating loading in the form of sine wave or square wave). The test system has the ability of computer input load spectrum for dynamic test, which can simulate uphill and downhill, start braking, accelerate and decelerate and other working conditions
3. System speed regulation: two-way, frequency conversion speed regulation, dynamic response 8ms;
4. Torque control mode: torque vector frequency conversion control, dynamic response 5ms;
5. System operation mode: manual control, automatic program control. A variety of control modes can be switched without disturbance;
6. Digital test bench operation mode:
a. Automatic speed control.
b. Automatic torque control.
c. Program-controlled simulation of road resistance control: including road condition simulation, speed control, slope control and torque control mode.
d. The test device has the function of speed control and torque control switching, and the above two modes can be switched smoothly in dynamic operation. The switching time is less than: 1s;
7. Overload capacity: 150% over-torque for 10min, 200% over-torque for 1 min, the torque at zero speed (0Hz) can reach 200% of the rated torque, and the speed can be reduced to zero without torque attenuation.