Driving circuit for rotating motor in forward and reverse...

Details Driving circuit for rotating motor in forward and reverse... Driving circuit for rotating motor in forward and reverse...

2005-07-12

2005-07-12

Martin, David (Department: 2837)

Electricity: motive power systems

Motor-reversing

C318S281000, C318S283000, C318S286000, C318S287000, C318S288000, C318S432000, C318S434000

Reexamination Certificate

active

06917169

ABSTRACT:
A field effect transistor is provided between the ground and an H bridge circuit for rotating a motor in forward and reverse directions in a manner that the drain of the transistor is grounded and the gate thereof is coupled to a DC power source such as a battery serving as a bias source which supplies electric power to the H bridge circuit. Thus, when the DC power source such as a battery is reversely connected, the field effect transistor normally in an on state is turned off. A controller monitors the source voltage of the field effect transistor, and when the controller detects an excess current, the controller outputs a control signal to the high-side driver to prevent the supply of electric power to the motor.

REFERENCES:
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patent: 4988931 (1991-01-01), Tsukahara et al.
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patent: 6696807 (2004-02-01), Iwata et al.
patent: 7-251749 (1995-10-01), None

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