Electricity: electrical systems and devices – Safety and protection of systems and devices – Motor protective condition responsive circuits
Reexamination Certificate
2003-05-09
2009-06-02
Jackson, Stephen W (Department: 2836)
Electricity: electrical systems and devices
Safety and protection of systems and devices
Motor protective condition responsive circuits
C361S075000
Reexamination Certificate
active
07542251
ABSTRACT:
A linear power controller system may be implemented that includes locked-rotor protection circuitry that is primarily assembled using analog circuit components. The locked rotor protection circuitry may be part of a power module in the system. The power module may be a switched power source that includes temperature circuit. A control loop may be established in the system to maintain the voltage across a motor that is driver by the power module. Circuitry for establishing a close loop with a motor may be positioned in a control head in the system or in a power module in the system. Temperature protection circuitry may be integrated into a current source in the power module to provide automatic thermal shutdown of the current source. The linear power module may specifically include analog circuitry that is arranged to establish a control loop with the motor.
REFERENCES:
patent: 3742303 (1973-06-01), Dageford
patent: 4751449 (1988-06-01), Chmiel
patent: 5023527 (1991-06-01), Erdman et al.
patent: 5262704 (1993-11-01), Farr
patent: 5574608 (1996-11-01), Fukuoka
patent: 5990640 (1999-11-01), Dwyer et al.
patent: 6611117 (2003-08-01), Hardt
“‘Omnifet II’: Fully Autoprotected Power MOSFET,” ST Microelectronics, Feb. 2003.
Carter Group, Inc.
Haynes and Bone, LLP
Jackson Stephen W
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