Electricity: motive power systems – Braking – Dynamic braking
Patent
1974-10-15
1979-05-01
Dobeck, B.
Electricity: motive power systems
Braking
Dynamic braking
318139, 318440, H02P 714
Patent
active
041526333
ABSTRACT:
In order to drive an electrically operated vehicle provided with an electric drive motor supplied with energy by a plurality of rechargeable batteries carried by the vehicle, in a manner to achieve high electric power utilization efficiency, the feed voltage for the driving motor is increased in steps by successive connection of a progressively increasing number of batteries in series with the driving motor, a load-dependent steady state of the motor corresponding to each feed voltage and to a constant rate of motor rotation, and the batteries are switched to provide a lower feed voltage when the motor, and thus also the vehicle, has achieved a selected steady state, at which time the driving motor, due to the dynamic inertia of the moving vehicle, acts as a generator which changes the batteries until the voltage generated by the motor acting as a generator drops to the lower feed voltage value, whereby a large portion of the energy used for propelling the vehicle is recovered.
REFERENCES:
patent: 1776317 (1930-09-01), Huguenin
patent: 3241019 (1966-03-01), Gross
patent: 3387194 (1968-06-01), Banks
patent: 3546548 (1970-12-01), Wouk
patent: 3696279 (1972-10-01), Gyori
patent: 3702959 (1972-11-01), Gloan
patent: 3728599 (1973-04-01), Minami
patent: 3786206 (1974-01-01), Kurimsky
Dobeck B.
Modern Production AB
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