Abstract— Motor loss increment driven by PWM
inverter is investigated by experimental results of induction
motor in comparison with sinusoidal wave source. PWM
inverter has a lot of time harmonic components in its output
voltage, though sinusoidal wave source has no harmonics.
Since the deviation of motor loss between PWM inverter
drive and sinusoidal wave source is considered to be a motor
loss increment affected by PWM inverter, it is compared
with the inverter circuit loss. As a result, it is founded that
motor loss increment is larger than inverter circuit loss in
some conditions. In order to decrease the total inverter loss,
which includes the inverter circuit loss and the motor loss
increment, optimum carrier frequency operation is
desirable in no-loaded condition, though the higher carrier
frequency is desirable in loaded condition. Therefore, motor
loss increment by PWM inverter should be paid attention in
designing PWM inverter.
Abstract— Motor loss increment driven by PWM
inverter is investigated by experimental results of induction
motor in comparison with sinusoidal wave source. PWM
inverter has a lot of time harmonic components in its output
voltage, though sinusoidal wave source has no harmonics.
Since the deviation of motor loss between PWM inverter
drive and sinusoidal wave source is considered to be a motor
loss increment affected by PWM inverter, it is compared
with the inverter circuit loss. As a result, it is founded that
motor loss increment is larger than inverter circuit loss in
some conditions. In order to decrease the total inverter loss,
which includes the inverter circuit loss and the motor loss
increment, optimum carrier frequency operation is
desirable in no-loaded condition, though the higher carrier
frequency is desirable in loaded condition. Therefore, motor
loss increment by PWM inverter should be paid attention in
designing PWM inverter.
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