Back to results
US 7,804,261 B2Granted
Motor control method and motor control apparatus
AssigneeHonda Motor Co., Ltd.
InventorsHirofumi Atarashi, Hiroyuki Isegawa
Life of this patent
Estimating the term…
Abstract
A motor control method that includes the steps of: rotationally driving a motor that is provided with a rotor having permanent magnet pieces, and a stator; and short circuiting a plurality of phases of the motor when the rotational frequency of the motor is equal to or greater than a predetermined rotational frequency.
Claims5
A motor control method comprising the steps of:
- rotationally driving with a driving source a motor that is provided with a rotor having permanent magnet pieces, and a stator;
- and
- short circuiting a plurality of phases of the motor when the rotational frequency of the motor is equal to or greater than a predetermined rotational frequency, wherein
- when at least a motor state quantity including the phase currents of the motor fluctuates by at least a predetermined value during execution of the short circuiting, the short circuiting and the rotational driving are stopped.
1 more element
A motor control apparatus comprising:
- a motor provided with a rotor having permanent magnet pieces, and a stator;
- a driving source that rotationally drives the rotor;
- a short circuiting device that short circuits a plurality of phases of the motor;
- a control device that rotationally drives the rotor with the driving source, and short circuits the plurality of phases of the motor by the short circuiting device in the case of the rotational frequency of the motor being equal to or greater than a predetermined rotational frequency;
- and
- a detection device that detects at least a motor state quantity including the phase currents of the motors, wherein
- the control device stops the short circuiting operation by the short circuiting device and the rotational driving operation by the driving source in the case of a detection value obtained by the detection device or a state quantity according to this detection value fluctuating by at least a predetermined value in the state of short circuiting a plurality of phases of the motor.
4 more elements
A motor control apparatus comprising
- a motor provided with a rotor having permanent magnet pieces, and a stator;
- a driving source that rotationally drives the rotor,
- a short circuiting device that short circuits a plurality of phases of the motor;
- a control device that rotationally drives the rotor with the driving source, and short circuits the plurality of phases of the motor by the short circuiting device in the case of the rotational frequency of the motor being equal to or greater than a predetermined rotational frequency, wherein
- the rotor is provided with a plurality of rotor members each equipped with the permanent magnet pieces and capable of changing the mutual relative phases, and a phase changing device that changes the induced voltage constant by changing the relative phases of the rotor members;
- and
- the control device increases the induced voltage constant by at least a predetermined value by the phase changing device when short circuiting the plurality of phases of the motor.
4 more elements
Dependencies are inferred from the claim text.