Sensorless AC motor controller
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Apr 14, 2015
Grant Date -
Aug 29, 2013
app pub date -
Nov 1, 2010
filing date -
Nov 6, 2009
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A controller for an AC electric motor, includes a Feed Forward Torque Controller and a load model. The Torque controller directly derives a torque related component of applied motor voltages from a signal representing a torque command input T* and at least one motor parameter. The load model derives a motor speed value including a model of motor speed behavior of the AC electric motor to provide an output signal which represents the motor speed of the AC electric motor. This motor speed output signal is used in determining a frequency of rotation of an applied motor voltage vector. Where an input to the load model is the signal representing the torque command input T*, the load model uses the signal representing the torque command T*, at least over a part of an operating speed range of the AC motor which includes zero speed, to determine the motor speed output signal.
First Claim
Other Claims data not available
Family
International Classification(s)
- 2010 Application Filing Year
- H02P Class
- 940 Applications Filed
- 634 Patents Issued To-Date
- 67.45 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 18 Citation Count
- H02P Class
- 76.13 % this patent is cited more than
- 10 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Oct 14, 2026 |
