Method for operating a brushless electric motor
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United States of America Patent
Stats
-
Feb 13, 2018
Issued Date -
N/A
app pub date -
Apr 1, 2013
filing date -
Apr 2, 2012
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A method for starting a multiphase, sensorless commutated, brushless electric motor. The method has three operating phases. A start-up phase in which the motor is operated from a standstill with specified commutation times. An acceleration phase in which the motor is accelerated up to a nominal speed, wherein the commutation times are determined on the basis of the zero crossings of the BEMF voltage of the non-energized stator phase windings. And a stationary operating phase in which the nominal speed is kept constant. The transition from the start-up phase into the acceleration phase takes place when, during the start-up phase, a predetermined number of successive zero crossings of the BEMF voltage in the expected order in the expected motor phases have been identified. The transition from the acceleration phase into the stationary phase takes place once the nominal speed has been reached.
First Claim
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International Classification(s)
- 2013 Application Filing Year
- H02P Class
- 1213 Applications Filed
- 1086 Patents Issued To-Date
- 89.54 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 2 Citation Count
- H02P Class
- 22.30 % this patent is cited more than
- 7 Age
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