这是因为电励磁的同步电动机可通过调节励磁电流来改变其磁场和功率因数，使输出的机械特性与负载特性相匹配。
Synchronous motor excitated magnet by direct current can make output mechanism specialities matched load specialities by means of adjusting exciting current to change magnetic field and power factor.
试验结果表明，电动机的励磁电流和转矩电流解耦成功，电动机动态响应快，运行平稳、具有较好的稳态性能。
The result show that the motor excitation current and torque current have been decoupled. The motor dynamic response fast, smooth operation, and has good steady-state performance.
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