Starting and control method for brushless DC motor

Details Starting and control method for brushless DC motor Starting and control method for brushless DC motor

1989-03-14

1993-07-06

Ip, Paul

Electricity: motive power systems

Induction motor systems

Primary circuit control

318254, 318138, 318696, H02K 2904, H02P 602

Patent

active

052257592

ABSTRACT:
Starting, accelerating and rated rotation of a rotor is carried out without any detector for the rotor position. A motor is controlled with an openloop circuit a short time in a starting area of low speed rotation, and thus the motor can be certainly started. In a rated rotation area, turning timing of the motor is precisely controlled by detecting counter-electromotive force of a stator coil.

REFERENCES:
patent: 3368128 (1968-02-01), Parrish
patent: 3775648 (1973-11-01), Brown et al.
patent: 4238717 (1980-12-01), Knight et al.
patent: 4250544 (1981-02-01), Alley
patent: 4480218 (1984-10-01), Hair
patent: 4495450 (1985-01-01), Tokizaki et al.
patent: 4888533 (1989-12-01), Gotoh et al.
patent: 5057753 (1991-10-01), Leuthold et al.

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