D-C motor drive system with field current flow reversal upon tra

Details D-C motor drive system with field current flow reversal upon tra D-C motor drive system with field current flow reversal upon tra

1975-12-18

1977-10-18

Schaefer, Robert K.

Electricity: motive power systems

Braking

Dynamic braking

318493, 318381, H02D 314, H02D 318

Patent

active

040548210

ABSTRACT:
A d-c motor drive system, useful for propelling and retarding electrically propelled traction vehicles, wherein the armature winding has a first terminal coupled through an armature chopper to a first polarity conductor of a d-c source, and a second terminal coupled through a breaker switch to a second polarity conductor of the d-c source. First and second controlled rectifiers are connected across the first and second conductors in a self commutating circuit such that they conduct sequentially and alternatively. Means are provided for varying their respective conduction time intervals to control the voltage at their junction. Field winding means are coupled from the junction of the controlled rectifiers to the junction of the armature second terminal and the breaker. During the motoring mode with the breaker closed field current flows in a first direction. During the retarding mode with breaker open and the second terminal of the armature coupled by a diode to the first conductor, field current flows in an opposite direction to permit d-c motor to operate as a retarding generator.

REFERENCES:
patent: 2855553 (1958-10-01), Morgan
patent: 3515970 (1970-06-01), Weiser
patent: 3660738 (1972-05-01), Anderson et al.
patent: 3735220 (1973-05-01), Renner et al.
patent: 3753059 (1973-08-01), Berman
patent: 3811080 (1974-05-01), Morton et al.
patent: 3866098 (1975-02-01), Weiser
Millermaster, "Hardwoods Control of Electric Motors" pp. 171-173, Wiley Interscience, 1970.

Affiliated with

Also associated with

Rating

D-C motor drive system with field current flow reversal upon tra does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with D-C motor drive system with field current flow reversal upon tra, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and D-C motor drive system with field current flow reversal upon tra will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1449114