| 摘要 |
A stand for DC series excitation electric machines loading-back comprises an electric motor and a generator, shafts of which are united and connected to a shaft of a complementary drive motor. Moreover, an armature winding and a generator excitation winding are in series connected and connected to input of a constant voltage transformer, transformer ratio is more than series connected armature winding and excitation winding of the electric motor are connected to output of the said transformer. |
