Bi-directional motor control incorporating a defroster element
First Claim
Patent Images
1. A vehicle comprising:
- a power source;
a bi-directional motor for moving a vehicle component, and having a pair of terminals across said motor; and
at least one resistive element attached to a planar surface of the vehicle and electrically connected to said power source;
said resistive element electrically connected to said motor for receiving current from said power source and selectively providing electrical resistance to both warm said planar surface and to drive said motor.
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Abstract
A unique electrical control for a defroster has a resistive electrical filament strip and a bi-directional motor having a H-bridge drive. The defroster filament may be simultaneously operated to warm a window or mirror and function as a power or current dissipating resistance to prevent a short circuit within the H-bridge drive.
11 Citations
16 Claims
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1. A vehicle comprising:
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a power source; a bi-directional motor for moving a vehicle component, and having a pair of terminals across said motor; and at least one resistive element attached to a planar surface of the vehicle and electrically connected to said power source; said resistive element electrically connected to said motor for receiving current from said power source and selectively providing electrical resistance to both warm said planar surface and to drive said motor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An electrical system comprising:
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a power source; a bi-directional wiper motor having a pair of terminals across said motor; and a pair of resistive elements, each resistive element attached to a window of a vehicle and electrically connected between either said power source and one of said motor terminals or one of said motor terminals and ground for receiving current and providing electrical resistance to both to warm said window and to drive said wiper motor. - View Dependent Claims (14, 15)
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16. A method for warming a window and driving a wiper motor in a vehicle having a power source, a bi-directional wiper motor, and at least one resistive element, the method comprising the steps of:
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attaching the at least one resistive element to the window; connecting the motor to the at least one resistive element; and selectively supplying current from the power source to the at least one resistive element to warm the window and drive the wiper motor.
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Specification