APPARATUS AND METHOD FOR DRIVING MOTOR
PROBLEM TO BE SOLVED: To provide an apparatus and method for driving a motor capable of reducing the vibration and noise of the motor. SOLUTION: This motor driving device drives a sensorless multiphase brushless motor which includes a rotor position detecting portion and a clock generating portion....
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| creator | TANIMOTO KIYOTAKA NISHINO HIDEKI |
| description | PROBLEM TO BE SOLVED: To provide an apparatus and method for driving a motor capable of reducing the vibration and noise of the motor. SOLUTION: This motor driving device drives a sensorless multiphase brushless motor which includes a rotor position detecting portion and a clock generating portion. The rotor position detecting portion generates an excitation phase switching signal which is a sequential pulse signal mated with the position of the rotor. Additionally, the excitation phase switching signal is divided to sub-zones, and a rotor position signal which takes a first state in one sub-zone is generated. The clock-generating portion includes a clock generator for generating a first clock signal, a clock generator for generating a second clock signal at a higher frequency, and a clock switching portion for switching the clock signal so as to output the first clock signal as a reference clock for PWM control, when the rotor position signal is in a first state and output the second clock signal as the reference clock for PWM control, when the rotor position signal is in a second state. COPYRIGHT: (C)2008,JPO&INPIT |
| format | Patent |
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SOLUTION: This motor driving device drives a sensorless multiphase brushless motor which includes a rotor position detecting portion and a clock generating portion. The rotor position detecting portion generates an excitation phase switching signal which is a sequential pulse signal mated with the position of the rotor. Additionally, the excitation phase switching signal is divided to sub-zones, and a rotor position signal which takes a first state in one sub-zone is generated. The clock-generating portion includes a clock generator for generating a first clock signal, a clock generator for generating a second clock signal at a higher frequency, and a clock switching portion for switching the clock signal so as to output the first clock signal as a reference clock for PWM control, when the rotor position signal is in a first state and output the second clock signal as the reference clock for PWM control, when the rotor position signal is in a second state. 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SOLUTION: This motor driving device drives a sensorless multiphase brushless motor which includes a rotor position detecting portion and a clock generating portion. The rotor position detecting portion generates an excitation phase switching signal which is a sequential pulse signal mated with the position of the rotor. Additionally, the excitation phase switching signal is divided to sub-zones, and a rotor position signal which takes a first state in one sub-zone is generated. The clock-generating portion includes a clock generator for generating a first clock signal, a clock generator for generating a second clock signal at a higher frequency, and a clock switching portion for switching the clock signal so as to output the first clock signal as a reference clock for PWM control, when the rotor position signal is in a first state and output the second clock signal as the reference clock for PWM control, when the rotor position signal is in a second state. 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SOLUTION: This motor driving device drives a sensorless multiphase brushless motor which includes a rotor position detecting portion and a clock generating portion. The rotor position detecting portion generates an excitation phase switching signal which is a sequential pulse signal mated with the position of the rotor. Additionally, the excitation phase switching signal is divided to sub-zones, and a rotor position signal which takes a first state in one sub-zone is generated. The clock-generating portion includes a clock generator for generating a first clock signal, a clock generator for generating a second clock signal at a higher frequency, and a clock switching portion for switching the clock signal so as to output the first clock signal as a reference clock for PWM control, when the rotor position signal is in a first state and output the second clock signal as the reference clock for PWM control, when the rotor position signal is in a second state. COPYRIGHT: (C)2008,JPO&INPIT</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY GENERATION |
| title | APPARATUS AND METHOD FOR DRIVING MOTOR |
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