Control system for hybrid operation of an electric motor
AssigneeRegal Beloit America, Inc.
InventorsLudovic Andre Chretien, Roger Carlos Becerra
Life of this patent
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Abstract
A control system for a permanent split capacitor (PSC) motor is provided herein. The control system includes a motor drive circuit configured to condition AC input voltage from an AC voltage source to an output voltage for operating the PSC motor at a variable speed. The control system also includes a switch device configured to couple the AC input voltage from the AC voltage source directly to the PSC motor for operating the PSC motor at a fixed speed.
Claims20
A control system for a permanent split capacitor (PSC) motor, said control system comprising:
- a motor drive circuit configured to condition AC input voltage from an AC voltage source to an output voltage for operating the PSC motor at a variable speed, said motor drive circuit comprising a three-phase inverter comprising:
- a first phase output coupled to a first side of a main winding of the PSC motor;
- a second phase output coupled to a common node defined between a series-coupled second side of the main winding and a first side of a start winding of the PSC motor;
- and
- a third phase output configured to be selectively coupled to a relay coupled to a second side of the start winding;
- and
- a switch device configured to couple the AC input voltage from the AC voltage source directly to the PSC motor for operating the PSC motor at a fixed speed.
A permanent split capacitor (PSC) motor comprising:
- a main winding having first and second sides;
- a start winding having first and second sides;
- a run capacitor having a first side coupled to an AC voltage source and a second side selectively coupleable to said start winding second side;
- and
- a control system for providing voltage to said main and start windings, said control system comprising:
- a motor drive circuit configured to condition AC input voltage from an AC voltage source to provide voltage to said PSC motor when there is a partial load on said PSC motor;
- and
- a switch device configured to couple the AC voltage source directly to said PSC motor when there is a full load on said PSC motor;
- and
- a relay coupled to said start winding second side, said relay configured to couple said run capacitor to said start winding second side when there is a full load on said PSC motor.
Dependencies are inferred from the claim text.