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Power conversion device, active filter, and motor drive device
Power conversion device, active filter, and motor drive device
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机译：功率转换装置，有源滤波器和电动机驱动装置
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摘要
PROBLEM TO BE SOLVED: To provide a power conversion device capable of appropriately controlling a current that flows to an AC power supply system.SOLUTION: A power conversion device 10 connected to an AC power source 1 comprises: an inverter circuit 4 that is connected with the AC power source 1 via a reactor 3; a voltage dividing resistor circuit 6 that is connected between an input terminal of each of phases of the AC power source 1 and a ground terminal at a DC side of the inverter circuit 4; a differential amplifier 7 that calculates a differential between detection voltages of any two phases detected by the voltage dividing resistor circuit 6 as an inter-line voltage of any two phases; and a control device 8 which performs PWM control on the inverter circuit 4, based on a PWM control signal that is corrected by using the inter-line voltage of any two phases calculated by the differential amplifier 7. The inter-line voltage of any two phases does not include a ripple component. Therefore, the control device 8 is capable of appropriately controlling the current that flows to the AC power supply system by performing the PWM control of the inverter circuit 4, based on the PWM control signal corrected by using the inter-line voltage.SELECTED DRAWING: Figure 1
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