Back to results
US 6,943,524 B2Granted
Switched reluctance motor regulation
AssigneeA. O. Smith Corporation
InventorBrian Thomas Branecky
Life of this patent
Estimating the term…
Abstract
A motor control system that switches between voltage control and angle control. The motor control system includes a comparator, an angle control, and a voltage control.
Claims24
A method of controlling a motor running at an operating speed, the method comprising:
- determining a speed error between the operating speed and a commanded speed;
- adjusting a turn-on angle in response to the speed error;
- and
- switching to a voltage control when the turn-on angle reaches a retardation limit.
1 more element
A method of controlling a motor running at an operating speed, the method comprising:
- determining a speed error between the operating speed and a speed command;
- adjusting an angle command to minimize the speed error while maintaining a voltage-frequency relationship;
- determining a retardation limit of the angle command from the speed;
- and
- switching to a voltage control when the retardation limit is reached.
2 more elements
A control system of a motor, the control system comprising:
- a comparator configured to compare a feedback speed and a commanded speed, and to generate a speed difference between the feedback speed and the commanded speed;
- an angle control coupled to the comparator, and configured to receive the speed difference, and to adjust a turn-on angle in response to the speed difference;
- and
- a voltage control configured to be activated when the turn-on angle reaches a retardation limit, and to generate a voltage command.
1 more element
Dependencies are inferred from the claim text.