Overload current control circuit for a DC motor

Details Overload current control circuit for a DC motor Overload current control circuit for a DC motor

2007-08-29

2009-06-23

Masih, Karen (Department: 2837)

Electricity: motive power systems

Constant motor current, load and/or torque control

C318S434000, C388S815000

Reexamination Certificate

active

07550940

ABSTRACT:
An overload current control circuit for a DC motor comprises: a DC motor, a DC power source, a power semiconductor assembly, and a sampling resistor that are connected in series. The overload current control circuit further comprises a voltage polarity switching circuit that is connected to a circuit between the sampling resistor and the overload protection and detection circuit to control the single polarity of the sampling voltage of the first and second terminals of the sampling resistor, so as to provide constant voltage potential to the overload protection and detection circuit, thus providing overload protection to the DC motor.

REFERENCES:
patent: 2008/0239767 (2008-10-01), Zheng et al.

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