Motor control system for electric motor and method of use

    公开(公告)号:US10483898B1

    公开(公告)日:2019-11-19

    申请号:US15966614

    申请日:2018-04-30

    IPC分类号: H02P27/06 F04D25/08 F04D25/06

    摘要: A motor control system for operating an electric motor is described. The motor control system includes a power supply module disposed external to the electric motor and configured to convert an alternating current (AC) voltage at a first level to a direct current (DC) voltage at a second level lower than a DC-equivalent voltage of the AC voltage at the first level, and a motor control assembly coupled to the electric motor. The motor control assembly includes an input power connector configured to receive the DC voltage at the second level from the power supply module. The motor control assembly also includes an inverter module coupled to the input power connector. The inverter module is configured to convert the DC voltage at the second level to an AC motor voltage to operate the electric motor.

    ELECTRIC MACHINE, MOISTURE GUIDE AND ASSOCIATED METHOD
    3.
    发明申请
    ELECTRIC MACHINE, MOISTURE GUIDE AND ASSOCIATED METHOD 有权
    电机,水分指导及相关方法

    公开(公告)号:US20160049842A1

    公开(公告)日:2016-02-18

    申请号:US14457570

    申请日:2014-08-12

    IPC分类号: H02K5/04

    摘要: According to an embodiment of the invention, an electric machine for use in an environment having moisture is provided. The machine includes a housing that has an inner surface defining a cavity in the housing. The housing defines a leak path exit adapted to remove moisture accumulating within the housing away from the housing. The electric machine further includes a stator secured to the housing and a rotor that is rotatably secured to the housing, The electric machine further includes a moisture guide positioned at least partially within the cavity and adapted to guide at least some of the moisture toward the leak path exit.

    摘要翻译: 根据本发明的一个实施例,提供一种在具有湿气的环境中使用的电机。 机器包括壳体,其具有在壳体中限定空腔的内表面。 壳体限定泄漏路径出口,其适于除去容纳在壳体内的水分远离壳体。 电机还包括固定到壳体上的定子和可旋转地固定到壳体上的转子。电机还包括至少部分地位于空腔内的湿气引导件,并且适于将至少一部分水分引向泄漏 路径退出。

    Drive circuit for electric motors

    公开(公告)号:US10439540B1

    公开(公告)日:2019-10-08

    申请号:US15939606

    申请日:2018-03-29

    IPC分类号: H02P23/00 H02P25/18 H02P27/08

    摘要: A drive circuit for an electric motor includes a variable frequency drive (VFD), a drive contactor, and a controller. The VFD is configured to receive line frequency current from a power source and apply a fixed frequency voltage to convert the line frequency current to a fixed frequency current. The drive contactor is configured to selectively couple the drive circuit to windings of the motor. The controller is configured to monitor for presence of a control signal applied to the drive contactor, wherein presence of the control signal closes the drive contactor to couple the drive circuit to the windings of the electric motor. The controller applies the fixed frequency voltage from the VFD to the windings upon determining presence of the control signal, determines whether the motor is motoring or regenerating after applying the fixed frequency voltage, and gradually increases the fixed frequency voltage applied to the windings when the motor is motoring.