Circuit for and method of controlling 4-phase brushless DC motor

Details Circuit for and method of controlling 4-phase brushless DC motor Circuit for and method of controlling 4-phase brushless DC motor

1989-04-13

1991-08-27

Roskoski, Bernard

Electricity: motive power systems

Switched reluctance motor commutation control

318138, H02K 2910

Patent

active

050436414

ABSTRACT:
A control circuit bipolarly controls the stator of a 4-phase brushless DC motor in which the staor windings are connected in a ring circuit with only four semiconductor switches. Also, two control sequences are possible: a first control sequence consisting of four switching events per revolution and number of pole pairs, in which only two semiconductor switches are activated at a time, and a second control sequence consisting of eight switching events per revolution and number of pole pairs, in which alternately two and three semiconductor switches are activated simultaneously.

REFERENCES:
patent: 3831072 (1974-08-01), Tanikoshi
patent: 4484115 (1984-11-01), Takahashi
patent: 4689532 (1987-08-01), Howlett
patent: 4692675 (1987-09-01), Falk
patent: 4703235 (1987-10-01), Wisner
patent: 4703236 (1987-10-01), Jansen
Elektronik; 34 (1985) Oct., No. 22, Munchen, DE "Burstenloser Gleichstrommotor elektronisch angesteuert", Jerry Kmetz, pp. 92-98.
"Advanced Brushless D-C Motor Technology", from the Pittman Corp.; by Howard F. Hendricks, 1984.

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