Brushless, direct current motor with an energy dissipating circu

Details Brushless, direct current motor with an energy dissipating circu Brushless, direct current motor with an energy dissipating circu

1985-02-26

1986-06-10

Shoop, Jr., William M.

Electricity: motive power systems

Switched reluctance motor commutation control

318434, 318563, H02P 602

Patent

active

045945357

ABSTRACT:
A brushless dc motor has switching transistors to be sequentially made conductive to cause sequential excitation of field windings from a dc power supply and hence to cause rotation of an armature. The switching transistors are provided with respective protection diodes connected in parallel therewith and in an opposite polarity. The field windings are further connected, via respective energy release diodes opposite in polarity to the protection diodes, to a common energy dissipating circuit comprising a capacitor and two transistors having their emitters grounded. The energy dissipating circuit can take up the electric energy produced in the field windings during the nonconducting periods of the switching transistors.

REFERENCES:
patent: 3611081 (1971-10-01), Watson
patent: 3688172 (1972-08-01), Sieber et al.
patent: 3916272 (1975-10-01), Grunleitner et al.
patent: 4132930 (1979-01-01), Schalk
patent: 4249116 (1981-02-01), Hieda

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