Current estimation for an electric machine
AssigneeDelphi Technologies, Inc.
InventorsSayeed A. Mir, Aparna S Amberkar
Life of this patent
Estimating the term…
Abstract
A method and system for estimating current in a PM electric machine is disclosed. The method includes acquiring a torque value representative of the torque produced by the electric machine; receiving a position value indicative of the rotational position of the electric machine; obtaining a speed value indicative of the rotational velocity of the electric machine; receiving a temperature value representative of a temperature of the electric machine; calculating an estimate of the current. Where the calculating is based upon at least one of the torque value, the position value, the speed value, and the temperature value.
Claims39
A method for estimating current in a PM electric machine, the method comprising:
- acquiring a torque value representative of the torque produced by said electric machine;
- receiving a position value indicative of the rotational position of said electric machine;
- obtaining a speed value indicative of the rotational velocity of said electric machine;
- receiving a temperature value representative of a temperature of said electric machine;
- calculating an estimate of said current;
- and
- said calculating is based upon at least one of said torque value, said position value, said speed value, and said temperature value.
A system for estimating current in an electric machine, the system comprising:
- a PM electric machine;
- a position sensor configured to measure a rotor position of said electric machine and transmit a position signal;
- a temperature sensor configured to measure a temperature of said electric machine transmit a temperature signal;
- a controller, said controller receives said position signal and calculate a motor speed value;
- receives a temperature signal and generate a temperature value;
- calculates said estimate of said current.
A storage medium encoded with a machine-readable computer program code for estimating a current in an electric machine, said storage medium including instructions for causing controller to implement a method comprising:
- acquiring a torque value representative of the torque produced by said electric machine;
- receiving a position value indicative of the rotational position of said electric machine;
- obtaining a speed value indicative of the rotational velocity of said electric machine;
- receiving a temperature value representative of a temperature of said electric machine;
- calculating an estimate of said current;
- and
- said calculating based upon at least one of said torque value, said position value, said speed value, and said temperature value.
A computer data signal embodied in a carrier wave for estimating a current vector in an electric machine, said data signal comprising code configured to cause a controller to implement a method comprising:
- acquiring a torque value representative of the torque produced by said electric machine;
- receiving a position value indicative of the rotational position of said electric machine;
- obtaining a speed value indicative of the rotational velocity of said electric machine;
- receiving a temperature value representative of a temperature of said electric machine;
- calculating an estimate of said current;
- and
- said calculating based upon at least one of said torque value, said position value, said speed value, and said temperature value.
Dependencies are inferred from the claim text.