Method and apparatus for electromagnetically braking a motor
    2.
    发明授权
    Method and apparatus for electromagnetically braking a motor 有权
    用于电磁制动电机的方法和装置

    公开(公告)号:US08067909B2

    公开(公告)日:2011-11-29

    申请号:US12474430

    申请日:2009-05-29

    IPC分类号: H02P7/00

    摘要: An electromagnetic braking system and method is provided for selectively braking a motor using an electromagnetic brake having an electromagnet, a permanent magnet, a rotor assembly, and a brake pad. The brake assembly applies when the electromagnet is de-energized and releases when the electromagnet is energized. When applied the permanent magnet moves the brake pad into frictional engagement with a housing, and when released the electromagnet cancels the flux of the permanent magnet to allow a leaf spring to move the brake pad away from the housing. A controller has a DC/DC converter for converting a main bus voltage to a lower braking voltage based on certain parameters. The converter utilizes pulse-width modulation (PWM) to regulate the braking voltage. A calibrated gap is defined between the brake pad and permanent magnet when the brake assembly is released, and may be dynamically modified via the controller.

    摘要翻译: 提供一种电磁制动系统和方法,用于使用具有电磁体,永磁体,转子组件和制动衬块的电磁制动器选择性地制动电动机。 当电磁铁断电时,制动组件适用,当电磁铁通电时,制动器组件释放。 当施加永久磁铁时,制动片与壳体摩擦接合,当释放时,电磁铁抵消永久磁铁的磁通,使得片簧将制动片从壳体上移开。 控制器具有用于基于某些参数将主母线电压转换为较低制动电压的DC / DC转换器。 该转换器利用脉宽调制(PWM)来调节制动电压。 当制动组件被释放时,在制动衬块和永磁体之间限定校准的间隙,并且可以通过控制器动态地修改。