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在变频器的调试及运行过程中,有时需要测量它的某些输入、输出量。由于通常使用的交流仪表都是以测量工频正弦波为目的而设计制造的,而变频器电路中的许多量并非标准工频正弦波。因此,测量变频器电路时,如果仪表类型选择不当,测量结果会有较大误差,甚至根本无法进行测量。测量变频器电路的电压、电流、功率时可根据下列要求,选择适用的仪表。
During debugging and operation of the inverter, it is sometimes necessary to measure some of its inputs and outputs. Because commonly used AC instruments are designed and manufactured for the purpose of measuring power-frequency sine waves, many of the frequency converter circuits are not standard power-frequency sine waves. Therefore, when measuring the inverter circuit, if the type of the instrument is improperly selected, the measurement result may be greatly erroneous or even impossible to measure. When measuring the voltage, current and power of the inverter circuit, the applicable instrument can be selected according to the following requirements.