Apparatus and method for supplying DC power to control circuitry of matrix converter

Apparatus and methods for supplying DC power to control circuitry of a matrix converter are provided. In some embodiments, a matrix converter includes an array of switches having an AC input for receiving a multi-phase AC input voltage and an AC output for providing a multi-phase AC output voltage to a load, such as an electric motor. The matrix converter further includes control circuitry for opening or closing respective switches in the array; and a clamping circuit connected between the AC input and AC output of the array and usable to dissipate energy of the load in response to an overvoltage condition, such as an overvoltage condition generated during shutdown. The clamping circuit includes a switched mode power supply that can be used to generate a DC supply voltage for the control circuitry. 提供了用于向矩阵转换器的控制电路系统供应DC电力的设备和方法。在某些实施例中，一种矩阵转换器包含开关阵列，所述开关阵列具有用于接收多相AC输入电压的AC输入和用于向例如电动机等负载提供多相AC输出电压的AC输出。所述矩阵转换器进一步包含：控制电路系统，其用于断开或闭合所述阵列中的各个开关；以及箝位电路，其连接在所述阵列的所述AC输入与AC输出之间，并且可用以响应于例如在关停期间产生的过电压条件等过电压条件而耗散所述负载的能量