Invention Grant
US09203330B2 Motor control device and air conditioner 有权
电机控制装置和空调

Motor control device and air conditioner
Abstract:
A motor control device includes a PWM signal generation unit generating a signal pattern of two of three phases so that the pattern follows a rotor position, and a timing adjusting unit. The signal generation unit increases/decreases duty in both directions of lag side and lead side based on any phase of a carrier-wave period regarding a first phase. The signal generation unit increases/decreases duty in one direction regarding a second phase. The signal generation unit increases/decreases duty in a direction opposite to the second phase regarding a third phase. The timing adjusting unit adjusts detection timing so that a current detection unit detects current in fixed timing with respect to one phase and current in another fixed timing with respect to the other phase or the current detection unit is capable of detecting current in variable timing according to magnitude of output voltage to an inverter circuit.
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