Method and apparatus for brushless electrical machine control
AssigneeBrooks Automation US, LLC
InventorsJairo T Moura, Nathan Spiker, Aaron Gawlik, Jayaraman Krishnasamy
Life of this patent
Estimating the term…
Abstract
A variable reluctance motor load mapping apparatus includes a frame, an interface disposed on the frame configured for mounting a variable reluctance motor, a static load cell mounted to the frame and coupled to the variable reluctance motor, and a controller communicably coupled to the static load cell and the variable reluctance motor, the controller being configured to select at least one motor phase of the variable reluctance motor, energize the at least one motor phase, and receive motor operational data from at least the static load cell for mapping and generating an array of motor operational data look up tables.
Claims20
A brushless electric machine load mapping apparatus comprising:
- a frame;
- an interface disposed on the frame configured for mounting a brushless electric machine;
- a static load cell mounted to the frame separate and distinct from the brushless electric machine and coupled to the brushless electric machine so as to react rotor torque of the brushless electric machine;
- and
- a controller communicably coupled to the static load cell and the brushless electric machine, the controller being configured to receive from the static load cell brushless electric machine operational data from at least a static load cell static reaction of the rotor torque, of the brushless electric machine, responsive for mapping and generating an array of brushless electric machine operational data look up tables.
A method for characterizing the relationship between torque, current and position of a brushless electric machine, the method comprising:
- coupling a static load cell to an output shaft of a brushless electric machine;
- generating an array of static torques on the output shaft with the brushless electric machine, the output shaft being held static by the static load cell;
- adjusting a rotor position of the brushless electric machine;
- selecting, with a controller, adjacent phases of the brushless electric machine from all respective motor phases of the brushless electric machine and energizing the selected adjacent phases;
- and
- recording, with the controller, motor data that includes a static torque value, rotor position, and phase currents for the selected adjacent phases of the brushless electric machine.
A brushless electric machine load mapping apparatus comprising:
- a frame;
- an interface disposed on the frame configured for mounting a brushless electric machine;
- a static load cell mounted to the frame separate and distinct from the brushless electric machine and coupled to the brushless electric machine;
- and
- a controller communicably coupled to the static load cell and the brushless electric machine, the controller being configured to register with the controller a static motor torque, generated by the energized at least one motor phase of the brushless electric machine, statically reacted by and at the static load cell corresponding to a section of the at least one motor phase so as to describe a relation between values of the static motor torque, with respect to a motor rotor position and a respective phase current for each of the selected at least one motor phase of the brushless electric machine in operation.
Dependencies are inferred from the claim text.