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US 2020/0044583 A1Published application
Drive circuit for electric motors
AssigneeRegal Beloit America, Inc.
InventorsLudovic Andre Chretien, Howard R. Richardson, Gregory Lewis Gross, Jevon D. Reynolds, Joseph Stephen Carnes, Zachary Joseph Stauffer, Justin Michael Magyar, Kenneth L. Osborne, Nathan E. Snell
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Abstract
A drive circuit for an electric pump motor is provided. The drive circuit includes an inverter and a contactor. The inverter is configured to supply variable frequency current to the electric motor. The contactor is configured to supply the line frequency current to the electric motor.
Claims15
An electric pump system, comprising:
- a pump configured to be disposed in fluid communication with a volume of fluid, said pump and the volume of fluid together defining a load;
- an electric motor comprising a rotor and a stator, said rotor coupled to said pump;
- and
- a drive circuit coupled to said stator, said drive circuit comprising:
- an inverter configured to supply an alternating current (AC) power to said stator when the load is a full load;
- and
- a contactor configured to supply a line frequency power from an AC source to said stator when the load is a low load that is less than the full load.
4 more elements
A method of operating an electric pump system to drive a pumping load, said method comprising:
- operating an inverter to supply an alternating current (AC) power to a stator of an electric motor when the pumping load on the electric motor is a low load;
- disabling the inverter;
- and
- closing a contactor coupled between the stator and an AC source to supply line frequency power to the stator when the pumping load is a full load.
1 more element
Dependencies are inferred from the claim text.