Motor-driving circuit and wire-bonding apparatus

Electricity: motive power systems – Switched reluctance motor commutation control

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318138, 318439, 318685, H02K 702

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active

053172426

ABSTRACT:
A motor-driving circuit is used for driving a motor which is of a type including a rotor whose rotating shaft has a permanent magnet used for generating magnetic flux, and an armature having three-phase windings wound around an iron core to form Y-connection windings. The motor-driving circuit includes a circuit for short-circuiting two of the three leads extending from the Y-connection windings, a rotational position detector for detecting a rotational position of the motor, and a control circuit for causing an exciting an exciting current to flow between the short-circuited leads and the remaining lead, in such a manner that the rotational position detected by the rotational position-detecting means is moved to a designated rotational position which is corresponding to an external input which is within a narrow angular range.

REFERENCES:
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patent: 3937974 (1976-02-01), Lafuze
patent: 4340166 (1982-07-01), Bilane et al.
patent: 4364111 (1982-12-01), Jocz
patent: 4479078 (1984-10-01), Kidd et al.
patent: 4510422 (1985-04-01), Ogura
patent: 4565957 (1986-01-01), Gary et al.
patent: 4743825 (1988-05-01), Nashiki
patent: 4748385 (1988-05-01), Van Hout
patent: 4757241 (1988-07-01), Young
patent: 5144209 (1992-09-01), Ihgji et al.
Japanese Utility Model Publication (Kokoku) No. 58-24438; pp. 149-151; May 25, 1983.
Japanese Utility Model Publication (Kokoku) No. 1-24931; pp. 199-201; Jul. 27, 1989.

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