Overview of Synchronous Machine Training System The Synchronous generator /motor group is composed of the three-phase asynchronous motor, three-phase synchronous generator (motor), speed measuring device, power supply part and display device. The motor group can do combined training, can also do the training alone. It can finish the speed measurement and AC generation experiments of the synchronous motor. 2. The Functional characteristics 2.1.Design reasonable, easy to use and convenient. 2.2.Motor terminals are connected to the safety terminal terminals, both convenient and safe to use wiring. 2.3. Measure the speed of the motor 2.4. can complete the DC motor speed and direction of rotation changes 3 .The Technical parameters 3.1, The input voltage: three-phase five-wire system  AC380V ± 10% 50HZ 3.2, The working environment: temperature range is -5 ~ 40 3.3, The device capacity: AC