Method and system for controlling start of a permanent magnet machine
AssigneeDelphi Technologies, Inc.
InventorsJames E. Walters, Ronald John Krefta
Life of this patent
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Abstract
Method and system for controlling a permanent magnet machine are provided. The method provides a sensor assembly for sensing rotor sector position relative to a plurality of angular sectors. The method further provides a sensor for sensing angular increments in rotor position. The method allows starting the machine in a brushless direct current mode of operation using a calculated initial rotor position based on an initial angular sector position information from the sensor assembly. Upon determining a transition from the initial angular sector to the next angular sector, the method allows switching to a sinusoidal mode of operation using rotor position based on rotor position information from the incremental sensor.
Claims16
A method for controlling a permanent magnet machine, said method comprising:
- providing a sector sensor assembly for sensing rotor sector position relative to a plurality of angular sectors;
- providing a sensor for sensing angular increments in rotor angular position;
- starting the machine in a brushless direct current mode of operation using a calculated initial rotor sector position based on an initial sector position information from the sector sensor assembly;
- and
- upon determining a rotational transition of the rotor from the initial sector to an adjacent sector, switching to a sinusoidal mode of operation using rotor angular position based on rotor angular position information from the incremental sensor.
A system for controlling a permanent magnet machine, said system comprising:
- a sector sensor assembly for sensing rotor sector position relative to a plurality of angular sectors;
- a sensor for sensing angular increments in rotor angular position;
- a module configured to calculate initial rotor sector position based on an initial sector position information from the sensor assembly, wherein the initial rotor sector position is used for starting the machine in a brushless direct current mode of operation;
- and
- a sector-transition module configured to determine transitions between any two adjacent angular sectors as the rotor of the machine rotates;
- and
- a switching module responsive to a switching signal from the sector-transition module to pass rotor angular position information based on the incremental sensor, the rotor angular position information being used to provide a sinusoidal mode of operation, in lieu of the brushless direct current mode of operation, upon the sector-transition module determining a transition from the initial sector to an adjacent sector.
A system using a vector controller for controlling a permanent magnet machine, said system comprising:
- a sector sensor assembly for sensing rotor sector position relative to a plurality of angular sectors;
- a sensor for sensing angular increments in rotor angular position;
- a module configured to calculate initial rotor sector position based on an initial sector position information from the sensor assembly, wherein the initial rotor sector position is used for starting the machine in a brushless direct current mode of operation;
- and
- a sector-transition module configured to determine transitions between any two adjacent angular sectors as the rotor of the machine rotates;
- and
- a switching module responsive to a switching signal from the sector-transition module to pass rotor angular position information based on the incremental sensor, the rotor angular position information being used to provide a sinusoidal mode of operation, in lieu of the brushless direct current mode of operation, upon the sector-transition module determining a transition from the initial sector to an adjacent sector.
A method for controlling a permanent magnet machine using a vector controller, said method comprising:
- providing a sector sensor assembly for sensing rotor sector position relative to a plurality of angular sectors;
- providing a sensor for sensing angular increments in rotor angular position;
- operating the vector controller to start the machine in a brushless direct current mode of operation using a calculated initial rotor sector position based on an initial sector position information from the sensor assembly;
- and
- upon determining a rotational transition of the rotor from the initial sector to an adjacent sector, switching to a sinusoidal mode of operation using rotor angular position based on rotor angular position information from the incremental sensor.
Dependencies are inferred from the claim text.