Electricity: motive power systems – Synchronous motor systems – Hysteresis or reluctance motor systems
Patent
1992-12-04
1993-11-09
Shoop, Jr., William M.
Electricity: motive power systems
Synchronous motor systems
Hysteresis or reluctance motor systems
H02P 800
Patent
active
052606350
ABSTRACT:
A reluctance motor is provided which is small-sized and inexpensive, yet excellent in various operating characteristics such as a capability of highspeed operation, and which can be driven with a battery power supply and thus can be used as a drive source for various devices.
A current supply control circuit is supplied with first- to third-phase position detection signals which are continuous but not superposed one upon another in time, from a position detection device having three detection coils for detecting the position of a rotor, and supplies an electric current sequentially to first- to third-phase exciting coil pairs (K-L) in accordance with the received position detection signals: When one position detection signal is extinguished and thus the current supply to the exciting coil pair relating to this signal is interrupted, the magnetic energy stored in this exciting coil pair is discharged and supplied to another exciting coil pair to which an electric current is supplied in response to another position detection signal generated at the extinction of the first-mentioned position detection signal. Accordingly, the magnetic energy stored in the exciting coil pair for which the current supply is interrupted is quickly extinguished, while the exciting current flowing through the exciting coil pair for which the current supply is started is quickly raised, whereby a reduction of torque and a counter-torque caused respectively at an initial stage and a last stage of the current supply are eliminated, thus permitting a high-speed operation of the motor.
REFERENCES:
patent: 4030005 (1975-06-01), Doemen
patent: 4520302 (1985-05-01), Hill et al.
patent: 4584513 (1986-04-01), Freise et al.
patent: 4684867 (1987-08-01), Miller et al.
patent: 4868478 (1989-09-01), Hedlund et al.
patent: 4896088 (1990-01-01), Jahns
patent: 4933621 (1990-06-01), MacMinn et al.
patent: 5097191 (1992-03-01), Bahn
Cabeca John W.
Kabushikigaisha Sekogiken
Shoop Jr. William M.
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