Invention Grant
US08129951B2 Power charging assembly and method that includes a low voltage electrical device operable with pulse width modulation (PWM) control 有权
电力充电组件和方法,其包括可通过脉宽调制(PWM)控制工作的低电压电气装置

Power charging assembly and method that includes a low voltage electrical device operable with pulse width modulation (PWM) control
Abstract:
A power charging assembly and methods are provided to provide a pre-charge low-current state, a steady-state, high-current charging state, and an unconnect state for an electrical load of an electrical propulsion system in a hybrid electrical vehicle (HEV). The power charging assembly includes a positive contactor device, a negative contactor device, and a non-contactor device means. The rate at which that electrical load is pre-charged may be effectively controlled by using a pulse-width modulated (PWM) signal received by the non-contactor device means. A current-only carrying positive or negative contactor may be configured with the non-contactor device means to further prevent electrical arcing of the contacts of the positive and the negative contactor during power charging assembly operation.
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