6 phase motor torque measurement and control system
AssigneeBorgWarner Luxembourg Automotive Systems SA
InventorFelix Mandoux
Life of this patent
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Abstract
A method of measuring torque is provided in a six phase electrical motor which includes a motor-stator including two electrically independent stator winding arrangements which each have three combined windings such that the winding arrangements are symmetrical and offset by an angle to each other and such that each combined winding of the second stator arrangement has a corresponding combined winding in the first stator arrangement and offset thereto by an angle. The method includes a) determining the current in the three combined windings of the first stator arrangement and/or the current in the three combined windings of the second stator arrangement and b) determining the torque from the currents.
Claims20
A method of measuring torque in a six phase electrical motor, said six phase electrical motor including a motor stator including a first stator winding arrangement and a second stator winding arrangement which is electrically independent of the first stator winding arrangement, the first stator winding arrangement and the second stator winding arrangement each comprising three combined windings;
- the first stator winding arrangement and the second stator winding arrangement being symmetrical and offset by an angle to each other, such that each of the three combined windings of the second stator winding arrangement has a corresponding combined winding in the first stator winding arrangement and offset thereto by an angle, said method comprising:
- a) determining a first value of currents in the three combined windings of the first stator winding arrangement and a second value of the currents in the three combined windings of the second stator winding arrangement;
- b) determining a first value and a second value of the torque from the first value and the second value, respectively, of the currents determined from a);
- and
- c) controlling an operation of the six phase electrical motor using the first value of the torque, and using the second value of the torque for independent purposes including safety or monitoring.
One or more controllers for a six phase electrical motor, said six phase electrical motor including a motor stator including a first stator winding arrangement and a second stator winding arrangement which is electrically independent of the first stator winding arrangement, the first stator winding arrangement and the second stator winding arrangement each comprising three combined windings;
- the first stator winding arrangement and the second stator winding arrangement being symmetrical and offset by an angle to each other, such that each of the three combined windings of the second stator winding arrangement has a corresponding combined winding in the first stator winding arrangement and offset thereto by an angle, wherein the one or more controllers are configured to:
- a) determine a first value of currents in the three combined windings of the first stator winding arrangement and a second value of the currents in the three combined windings of the second stator winding arrangement;
- b) determine a first value and a second value of torque from the first value and the second value, respectively, of the currents determined from a);
- and
- c) control an operation of the six phase electrical motor using the first value of the torque, and using the second value of the torque for independent purposes including safety or monitoring.
A method comprising:
- determining a first current in a first stator winding of a motor, and determining a second current in a second stator winding of the motor, wherein the a second stator winding is electrically independent of the first stator winding;
- determining a first torque from the first current, and determining a second torque from the second current;
- controlling an operation of the motor using the first torque;
- and
- monitoring an operation of the motor using the second torque.
Dependencies are inferred from the claim text.