为确保机车安全可靠地运行，提出了加装故障励磁电路的建议。
The proposal for installing failure excitation circuit is given to guarantee safe operation.
文中具体分析了每级励磁电路存在的问题及故障原因，并提出相应的处理方法及防止措施。
This paper firstly analyzed the reason that resulted in those faults happening in each kind of excitation circuits. And then put forward some treatments to prevent it.
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。
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.
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