Apparatus and method for detecting BLDC motor overload
AssigneesHyundai Motor Company, Kia Motors Corporation
InventorChoong Seob Park
Life of this patent
Estimating the term…
Abstract
The present disclosure provides a brushless direct current (BLDC) motor overload detection apparatus. The BLDC motor overload detection apparatus includes a measurer for measuring an electrical angle of the BLDC motor, a determiner for determining whether a difference between the electrical angle measured by the measurer and a mechanical angle of the BLDC motor, estimated through current supplied to the BLDC motor, is within a predetermined range, and a driving controller for control of driving of the BLDC motor according to whether the BLDC motor stalls, determined by the determiner.
Claims13
An apparatus for detecting overload of a brushless direct current (BLDC) motor, comprising:
- a measurer for measuring an electrical angle of the BLDC motor;
- a determiner for determining whether a difference between the electrical angle measured by the measurer and a mechanical angle of the BLDC motor, estimated through current supplied to the BLDC motor, is within a predetermined range;
- and
- a driving controller for control of driving of the BLDC motor according to whether the BLDC motor stalls, determined by the determiner;
- wherein the predetermined range is set based on 90 degrees;
- when the BLDC motor is in a normal condition, the difference between the electrical angle and the mechanical angle is maintained within the predetermined range;
- and
- when the BLDC motor is in a stall condition, the difference between the electrical angle and the mechanical angle is out of the predetermined range.
A method of detecting stall of a brushless direct current (BLDC) motor, the method comprising:
- deriving a mechanical angle of the BLDC motor from a current value supplied to the BLDC motor;
- measuring an electrical angle of the BLDC motor;
- determining whether a difference between the mechanical angle and the electrical angle is within a predetermined range;
- counting a number of times an error, in which the difference between the mechanical angle and the electrical angle is out of the predetermined range, occurs;
- and
- determining whether the BLDC motor stalls based on the number of times the error occurs.
Dependencies are inferred from the claim text.