Motor control device

Details Motor control device Motor control device

2009-03-27

2011-12-13

Ip, Paul (Department: 2837)

Electricity: motive power systems

Synchronous motor systems

Brushless motor closed-loop control

C318S400020, C318S400040, C318S400320, C323S282000, C323S284000, C363S065000, C375S238000

Reexamination Certificate

active

08076880

ABSTRACT:
A motor control device has a three-phase bridge circuit, a driving circuit, and a microcomputer. The three-phase bridge circuit has three pairs of MOSFETs for U, V, and W phases of a three-phase AC motor as a control target. The microcomputer has a dead time set value storage unit and a PWM signal generation unit. The PWM signal generation unit generates a PWM signal with a dead time including a response characteristics of the pair of MOSFETs for each of U, V, and W phases of the AC motor based on a three-phase voltage instruction value supplied from an outside device and the dead time set value stored in the dead time set value storage unit. The PWM signal generation unit outputs the PWM signal for each phase to the driving circuit. This independently adjusts the dead time for the MOSFETs for each phase.

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Japanese Office Action dated Jan. 5, 2010, issued in corresponding Japanese Application No. 2008-102416, with English translation.

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