Motor control method, motor control device, fan device, compressor, and pump device
First Claim
Patent Images
1. A motor control device comprising:
- a motor having a rotor;
a position detection sensor that detects that said rotor is positioned at a predetermined electrical angle; and
a control section that repeatedly performs the steps of (a) detecting, by said position detection sensor, that said rotor is positioned at K (K>
1) predetermined electrical angles and (b) updating a voltage vector to be given to said motor, said updating being triggered by said detection, and further performs the step of (c) increasing a ratio of an interval at which said steps (a) and (b) are repeatedly performed relative to one cycle of rotation of said rotor, by changing the number of said predetermined electrical angles into M (K>
M≧
1).
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Abstract
Triggered by a position detection sensor detecting that a rotor is positioned at any one of K predetermined electrical angles, for example, 60°, 180°, and 300°, a voltage vector to be given to a motor is updated. When, for example, the rotation frequency is equal to or higher than a specified value, the predetermined electrical angles is changed into M, for example, into one angle of 60°.
8 Citations
13 Claims
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1. A motor control device comprising:
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a motor having a rotor; a position detection sensor that detects that said rotor is positioned at a predetermined electrical angle; and a control section that repeatedly performs the steps of (a) detecting, by said position detection sensor, that said rotor is positioned at K (K>
1) predetermined electrical angles and (b) updating a voltage vector to be given to said motor, said updating being triggered by said detection, and further performs the step of (c) increasing a ratio of an interval at which said steps (a) and (b) are repeatedly performed relative to one cycle of rotation of said rotor, by changing the number of said predetermined electrical angles into M (K>
M≧
1). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A motor control method which repeatedly performs the steps of:
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(a) detecting, by a position detection sensor, that a rotor included in a motor is positioned at K (K>
1) predetermined electrical angles; and(b) updating a voltage vector to be given to said motor, said updating being triggered by said detection, said motor control method further performing the step of (c) increasing a ratio of an interval at which said steps (a) and (b) are repeatedly performed relative to one cycle of rotation of said rotor, by changing the number of said predetermined electrical angles into M (K>
M≧
1). - View Dependent Claims (11, 12, 13)
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Specification