초록 ▼

A method and circuit for detecting a locked rotor in a switched reluctance motor are provided. The method includes the step of measuring, at a predetermined frequency, the time required for a current in the motor to rise or fall between predetermined current levels to thereby obtain a plurality of s

A method and circuit for detecting a locked rotor in a switched reluctance motor are provided. The method includes the step of measuring, at a predetermined frequency, the time required for a current in the motor to rise or fall between predetermined current levels to thereby obtain a plurality of sample rise or fall times. The method further includes the step of comparing first and second sample times of the plurality of sample times to obtain a time comparison value that is indicative of a change in position of the rotor. Because current rise and fall times are indicative of, and vary with, rotor position, a comparison of multiple rise or fall times may be used to indicate a change in position of the rotor and, therefore, whether the rotor is in motion or is locked. The method may finally include the step of comparing the time comparison value to a predetermined reference value that is indicative of a locked rotor.

대표청구항 ▼

[ We claim:] [1.] A method for detecting a locked rotor in a motor, comprising the steps of:measuring, at a predetermined frequency, the time for a current in said motor to move between a first predetermined current level and a second predetermined current level whereby a plurality of sample times a

[ We claim:] [1.] A method for detecting a locked rotor in a motor, comprising the steps of:measuring, at a predetermined frequency, the time for a current in said motor to move between a first predetermined current level and a second predetermined current level whereby a plurality of sample times are obtained; and,comparing a first sample time of said plurality of sample times to a second sample time of said plurality of sample times to obtain a time comparison valuewherein said time comparison value is indicative of a change in position of said rotor.