Chopper control system

Details Chopper control system Chopper control system

1987-02-17

1988-06-21

Shoop, Jr., William M.

Electricity: motive power systems

Braking

Automatic and/or with time-delay means

318345R, 318339, 363124, H02P 500

Patent

active

047527234

ABSTRACT:
A chopper control system for a vehicle driven by a shunt motor. The system is provided with an integrating circuit for generating a command value for the voltage which is to be supplied to an armature of the motor in accordance with the difference between the command value of current which is to be supplied to the armature and the detected value of current flowing through the armature, and with a voltage control circuit for generating a control signal the value of which is proportional to the above command voltage value and is inversely proportional to the power source voltage value. The gate of a chopper switch is on-off controlled by the above control signal, so that the power source voltage value is converted into a voltage value corresponding to the command voltage value and is then supplied to the armature of the motor. By virtue of this arrangement, the armature is supplied with voltage without influence from fluctuations in the power source voltage, and when any wheel slip occurs, the armature current is varied in the direction that causes reduction in the degree of wheel slip.

REFERENCES:
patent: 4114076 (1978-09-01), Teranish et al.
patent: 4267492 (1981-05-01), Manners
patent: 4322667 (1982-03-01), Ohba
patent: 4366420 (1982-12-01), Omae et al.
patent: 4370603 (1983-01-01), Franz, Jr. et al.
patent: 4375603 (1983-03-01), Konrad
patent: 4458186 (1984-07-01), Kuriyama et al.
patent: 4500820 (1985-02-01), Noto et al.
patent: 4528487 (1985-07-01), Jimbo et al.
patent: 4580083 (1986-04-01), Omae et al.
patent: 4684859 (1987-08-01), Nohmi et al.

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