Speed control apparatus for direct current motor

Details Speed control apparatus for direct current motor Speed control apparatus for direct current motor

1981-10-09

1984-01-24

Truhe, J. V.

Electricity: motive power systems

Braking

Automatic and/or with time-delay means

318341, 318345B, H02P 506

Patent

active

044279310

ABSTRACT:
A speed control apparatus for a direct current motor comprises a bridge circuit having an armature in one side thereof, a direct current voltage source, and a series connection of a switching transistor and an inductor inserted between the direct current voltage source and the bridge circuit. A detecting transistor detects an unbalanced voltage of the bridge circuit and control transistors are responsive to the detection to control the switching transistor to be turned on or off. The inductor stores a magnetic energy when the switching transistor is turned on and supplies an electromotive force induced by the stored magnetic energy to the bridge circuit when the switching transistor is turned off. To that end, a diode or a transistor cooperates with the inductor and the bridge circuit to constitute a closed loop. A capacitor is connected in parallel with the armature, thereby to restrict the operation of the detecting transistor and thus the on/off-period of the switching transistor.

REFERENCES:
patent: 3475672 (1969-10-01), Oltendorf
patent: 3560828 (1971-02-01), Kobayashi et al.
patent: 3562615 (1971-02-01), Nasu et al.
patent: 3855511 (1974-12-01), Smith
patent: 3942085 (1976-03-01), Tadakuma et al.
patent: 3987349 (1976-10-01), Shibata et al.
patent: 4087726 (1978-05-01), Bourguet et al.
patent: 4384241 (1983-05-01), Stillhard

Affiliated with

Also associated with

Rating

Speed control apparatus for direct current motor does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Speed control apparatus for direct current motor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Speed control apparatus for direct current motor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1289571