Control apparatus for electric vehicles

Details Control apparatus for electric vehicles Control apparatus for electric vehicles

1987-05-22

1988-12-20

Shoop, Jr., William M.

Electricity: motive power systems

Braking

Automatic and/or with time-delay means

318376, 318139, H02P 706

Patent

active

047927364

ABSTRACT:
There are provided a first chopper CH1 connected in parallel with armatures M1, M2 of main motors of an electric vehicle and operating during a braking mode, and a second chopper CH2 connected in series with the armatures and operating during a powering mode. Both the choppers have a reverse-directional conductivity. A third chopper FCH is further provided to control a field current of the main motors. According to this invention, an arrangement of a main circuit of the electric vehicle is not necessary to be switched over, even though the operation mode thereof is changed. Further, compared with the prior art, the number of the choppers used decreases, so that an economical control apparatus for the electric vehicle can be realized.

REFERENCES:
patent: 3569811 (1971-03-01), Miller et al.
patent: 3984743 (1976-10-01), Horie
patent: 4095154 (1978-06-01), Williamson
patent: 4124812 (1978-11-01), Naito et al.
patent: 4267492 (1981-05-01), Manners
patent: 4401927 (1983-08-01), Thuy
patent: 4424558 (1984-01-01), N'Guyen Uyen

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