Motor drive apparatus

• Main Authors: MASAYA TATEDA, YASUYUKI MATSUMOTO
• Format: Patent
• Language: Chinese; English
• Published: 11.12.2018
• Subjects: CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

The invention relates to a motor drive apparatus that includes a forward converter configured to convert AC power inputted by an AC power supply to DC power and to output the same to a DC link; a DC link capacitor provided in the DC link; an inverter configured to convert the DC power in the DC link to AC power for driving a motor and to output the AC power; a DC voltage detection unit configuredto detect a value of DC voltage applied across the DC link capacitor; an AC voltage detection unit configured to detect a peak value of AC voltage on an AC input side of the converter; and a leakage current detection unit configured to detect a leakage current caused by driving the motor, based on the value of DC voltage detected by the DC voltage detection unit and the peak value of AC voltage detected by the AC voltage detection unit. 本公开涉及电动机驱动装置，具备：正变换器，其将从交流电源输入的交流电力变换为直流电力并且向直流环节输出；直流环节电容器，其设置于直流环节；逆变换器，其将直流环节的直流电力变换为用于电动机驱动的交流电力并且输出；直流电压检测部，其检测施加于直流环节电容器的两端的直流电压值；交流电压检测部，其检测正变换器的交流输入侧的交流电压的峰值；以及漏电流检测部，其基于由直流电压检