Since HSY requires dc magnetic field, an exciter with control circuitry is needed in addition to the conventional PMSY drive unit when employed as a motor.
HSY作为电动机使用时，由于需要直流磁场，与普通pmsy的驱动单元相比，应额外增加一个励磁电路。
The paper introduced some debugging problems and solving methods according to DC speed regulating system of reversible magnetic field and logical control without circular current.
针对磁场可逆的逻辑无环流直流调速系统，介绍了调试过程中出现的一些问题及处理方法。
Proposed a vague location control method to launch the rotor, which is an effective solution to the problem of weakening magnetic field caused by traditional DC torque methods.
提出了一种基于位置模糊控制策略的启动方法，有效解决了传统直流转矩定位方法的转子退磁问题。
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