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AC to DC to AC power conversion apparatus with few active switches and input and output control
AC to DC to AC power conversion apparatus with few active switches and input and output control
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机译:交流到直流到交流电源转换设备,具有很少的有源开关和输入和输出控制
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摘要
A power conversion apparatus for providing AC to DC to AC power conversion which is particularly adapted for use with single phase uninterruptable power supply systems. By having the power flow completely unidirectional from AC line to load, only four active switches are required to provide independent control of the input and output currents, a common neutral connection, line connection, sinusoidal input currents independent to load currents, as well as battery charge and discharge regulation. In an embodiment where low voltage battery and resonant link operation is desired, an additional switch is utilised. The apparatus utilises a rectifier bridge, a DC power source inverter having gate controllable switching devices connected in a bridge configuration and control means for controlling the switching of the controllable switching devices to provide AC output at a selected frequency, a common neutral line being utilised which is common to one of the input terminals and one of the output terminals of the apparatus and also to one output node of the inverter bridge configuration.
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