INVERTER DRIVEN MOTOR WINDING LIFE EXTENSION
First Claim
1. An electric motor control system, comprising:
- an electric motor having a first winding with a first end and a second end;
a motor controller having a first phase lead corresponding to the first winding of the electric motor, the motor controller operable to direct a phase current to the first phase lead;
a first switching device operably connected to the motor controller and providing an electrical connection between the first phase lead and the first end of the first winding when in a disabled state, and thereby flowing the phase current from the first phase lead to the first end of the first winding; and
a second switching device operably connected to the motor controller and providing an electrical connection between the second end of the first winding and a second common point when in an enabled state,wherein the motor controller is operable to change the state of the first switching device to enabled and change the state of the second switching device to disabled under selected conditions.
1 Assignment
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Accused Products
Abstract
An electric motor control system including an electric motor having a winding with a first and second end, a motor controller having a phase lead, the motor controller operable to direct a phase current to the phase lead. The electric motor control system also includes a first switching device that provides an electrical connection between the phase lead and the first end of the first winding when in a disabled state, and thereby flowing the phase current from the phase lead to the first end of the first winding, and a second switching device operably connected to the motor controller and providing an electrical connection between the second end of the first winding and a common point, when in an enabled state. The motor controller is operable to change the state of the first switching device to enabled, and the second switching device to disabled, under selected conditions.
0 Citations
20 Claims
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1. An electric motor control system, comprising:
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an electric motor having a first winding with a first end and a second end; a motor controller having a first phase lead corresponding to the first winding of the electric motor, the motor controller operable to direct a phase current to the first phase lead; a first switching device operably connected to the motor controller and providing an electrical connection between the first phase lead and the first end of the first winding when in a disabled state, and thereby flowing the phase current from the first phase lead to the first end of the first winding; and a second switching device operably connected to the motor controller and providing an electrical connection between the second end of the first winding and a second common point when in an enabled state, wherein the motor controller is operable to change the state of the first switching device to enabled and change the state of the second switching device to disabled under selected conditions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method extending winding life in an electric motor driven by an inverter, the method comprising:
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directing, by a motor controller, a first phase current through a first end of a first winding of the electric motor, and connecting a second end of the first winding to a second common point; re-directing, by a motor controller, the first phase current through the second end of a first winding of the electric motor and connecting the first end of the first winding to a first common point, under selected conditions. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification