Apparatus and method for determining normal start up of sensorless motor
First Claim
1. An apparatus for determining a start-up of a sensorless motor, the apparatus comprising:
- a timer that determines whether a predetermined time has elapsed after a start-up of the motor is initiated;
a motor velocity determiner that determines whether a velocity of the motor exceeds a predetermined velocity value when the predetermined time has elapsed;
a current value determiner that determines whether a current flowing in the motor exceeds a predetermined current value when the velocity of the motor does not exceed the predetermined velocity value; and
an abnormal start-up determiner that determines that the motor has been abnormally started up when the amount of current does not exceed the predetermined current value when the velocity of the motor does not exceed the predetermined velocity value.
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Accused Products
Abstract
An apparatus and method determine a start-up of a sensorless motor. The apparatus includes an elapsed time determination unit, a motor velocity determination unit and an abnormal start-up determination unit. The elapsed time determination unit determines whether a predetermined time has elapsed after a start-up of the motor is initiated. The motor velocity determination unit determines whether a velocity of the motor exceeds a predetermined velocity value when the predetermined time has elapsed. The abnormal start-up determination unit determines that the motor was abnormally started up when the velocity of the motor does not exceed the predetermined value, and an amount of current flowing in the motor does not exceed a predetermined current value.
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Citations
20 Claims
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1. An apparatus for determining a start-up of a sensorless motor, the apparatus comprising:
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a timer that determines whether a predetermined time has elapsed after a start-up of the motor is initiated; a motor velocity determiner that determines whether a velocity of the motor exceeds a predetermined velocity value when the predetermined time has elapsed; a current value determiner that determines whether a current flowing in the motor exceeds a predetermined current value when the velocity of the motor does not exceed the predetermined velocity value; and an abnormal start-up determiner that determines that the motor has been abnormally started up when the amount of current does not exceed the predetermined current value when the velocity of the motor does not exceed the predetermined velocity value. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for determining a start-up of a sensorless motor, the method comprising:
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determining whether a predetermined time has elapsed after a start-up of the motor is initiated; determining whether a velocity of the motor exceeds a predetermined velocity value when the predetermined time has elapsed; determining whether the current flowing in the motor exceeds a predetermined current value when the velocity of the motor does not exceed the predetermined velocity value; and judging that the motor has been abnormally started up when the current flowing in the motor exceeds the predetermined current value. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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16. An apparatus for identifying an abnormal start-up of a sensorless motor, the apparatus comprising:
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a comparer that compares an amount of current flowing in the motor when a velocity of the motor does not exceed a predetermined velocity value after a predetermined period of time after a start-up of the motor is initiated; and a start-up determiner that determines that the motor has been abnormally started up when the amount of current does not exceed a predetermined current value. - View Dependent Claims (17, 18, 19, 20)
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Specification