Output voltage control for a DC servo amplifier

Details Output voltage control for a DC servo amplifier Output voltage control for a DC servo amplifier

1985-04-19

1987-03-03

Shoop, Jr., William M.

Electricity: motive power systems

Plural, diverse or diversely controlled electric motors

Running-speed control

318 51, 318 67, 318112, 318293, H02P 768

Patent

active

046478248

ABSTRACT:
In a system having a plurality of electric motors which are rated at different voltages, a voltage control circuit enables the electric motors to be connected to a common power supply. The voltage control circuit determines a first voltage appearing between the positive bus of the power supply and the motor and a second voltage appearing between the negative bus and the motor. One voltage is inverted and then summed with the non-inverted voltage to provide an average voltage. The average voltage is compared to a reference voltage and when the average voltage exceeds the reference voltage, a limit signal is generated. The limit signal is used to prevent higher voltages from being applied across the motor.

REFERENCES:
patent: 3538405 (1970-11-01), Borden et al.
patent: 4121138 (1978-10-01), Flint et al.
patent: 4251757 (1981-02-01), Akamatsu
patent: 4284929 (1981-08-01), Garrett et al.

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