| US 7,486,040 B2 | ||
| Circuit to momentarily increase the peak torque of a DC motor | ||
| Charles R. DeJohn, Rochester, N.Y. (US) | ||
| Assigned to Delphi Technologies, Inc., Troy, Mich. (US) | ||
| Filed on Aug. 22, 2006, as Appl. No. 11/507,760. | ||
| Prior Publication US 2008/0048600 A1, Feb. 28, 2008 | ||
| Int. Cl. H02P 7/00 (2006.01) | ||
| U.S. Cl. 318—434 [318/432; 323/220; 323/242; 323/246] | 10 Claims |
| 1. A DC motor control circuit comprising:
a) a bipolar motor driver having a first terminal thereof coupled to a first terminal of said motor;
b) a parallel combination of a capacitor and a switch with a first terminal of said parallel combination coupled directly
to a second terminal of said bipolar motor driver and a second terminal of said parallel combination coupled directly to a
second terminal of said DC motor; and
c) a motor monitor coupled to said DC motor, said switch, and said bipolar motor driver, said motor monitor sensing when said
DC motor lacks sufficient torque to rotate a motor shaft of said DC motor under normal operating conditions and controlling
the operation of said switch and said bipolar motor driver to momentarily increase the torque of said bipolar motor.
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