Motor driving device, motor driving method, and motor apparatus

Details Motor driving device, motor driving method, and motor apparatus Motor driving device, motor driving method, and motor apparatus

2008-04-29

2008-04-29

Duda, Rina (Department: 2837)

Electricity: motive power systems

Constant motor current, load and/or torque control

C318S434000, C318S599000, C318S811000

Reexamination Certificate

active

11151057

ABSTRACT:
A motor driving part has half bridge circuits in which a high potential side drive transistor and a low potential side drive transistor are connected in series to each other, and a connection point therebetween serves as a stator winding driving terminal of each phase of a motor. A rotor position detector detects a rotor position of the motor and outputs a rotor position signal. The current phase detector detects the phase of a phase current flowing in the stator winding driving terminal. A voltage signal generator controls and generates a voltage profile signal such that a first phase difference that is a difference between the phase of the phase current and the phase of the rotor position signal is kept to a predetermined electrical angle. A driving signal generator generates a PWM signal that drives the drive transistor of each phase depending on the voltage profile signal.

REFERENCES:
patent: 5844388 (1998-12-01), Maiocchi
patent: 6646407 (2003-11-01), Rahman et al.
patent: 2001-037279 (2001-02-01), None

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