Output voltage control for a DC servo amplifier
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United States of America Patent
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-
Mar 3, 1987
Grant Date -
N/A
app pub date -
Apr 19, 1985
filing date -
Apr 19, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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