Electricity: motive power systems – Battery-fed motor systems
Patent
1975-02-11
1977-02-15
Rubinson, Gene Z.
Electricity: motive power systems
Battery-fed motor systems
318338, 318405, 318493, H02P 506
Patent
active
040084230
ABSTRACT:
A propulsion system for an electrical vehicle including a linear proportional controller operable in a plurality of modes for operating a d.c. drive motor via power derived from a propulsion battery. Low speed operation is achieved in an armature control mode wherein the controller is interposed between the propulsion battery and the motor armature while the motor field is coupled directly across the battery. High speeds are attained in a field control mode wherein the controller is interposed between the battery and motor field while the armature is coupled directly across the propulsion battery, thereby eliminating controller losses from the high current armature circuit. Switching between modes is achieved in a manner which minimizes stress on the switching elements. The controller is also adapted to operate in a charger mode wherein unregulated d.c. power is fed to the controller which functions to regulate the charge provided to the battery. Overall efficiency is increased by use of a dual chopper as a power modulator element. The circuit further includes protection means for controlling or preventing operation under conditions wherein circuit elements might be damaged.
REFERENCES:
patent: 3378746 (1968-04-01), Weiser
patent: 3405340 (1968-10-01), Ankenman et al.
patent: 3419777 (1968-12-01), Asseo
patent: 3716768 (1973-02-01), Mason
patent: 3904947 (1975-09-01), Crews
Bourke Robert F.
Christianson Clinton C.
Gould Inc.
Rubinson Gene Z.
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