| 摘要 |
<p>A control section (4) which repeats inverter control in units of an inverter control period (T2) having a predetermined length is provided. In the control section (4), a phase current detection period (T1) in which a phase current is detected is provided between predetermined two inverter control periods (T2), each of switching states of switching elements (Sup, ..., Swn) of a inverter circuit (3) is controlled so that a voltage pulse having a larger width than a width of a voltage pulse in the inverter control period (T2) is output from a shunt resistor (R) in the phase current detection period (T1).</p> |
