Motor speed control integrated circuit
원문보기
IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
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출원번호 |
US-0386160
(2006-03-21)
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등록번호 |
US-7301294
(2007-11-27)
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우선권정보 |
JP-2005-252214(2005-08-31) |
발명자
/ 주소 |
- Ogino,Koichiro
- Harashima,Takashi
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
6 인용 특허 :
1 |
초록
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A motor speed control integrated circuit which controls a rotational speed of a motor by controlling the amount of current flowing through a drive coil of the motor. The integrated circuit comprises a first input terminal to have an analog speed-specifying signal in analog amount specifying the rota
A motor speed control integrated circuit which controls a rotational speed of a motor by controlling the amount of current flowing through a drive coil of the motor. The integrated circuit comprises a first input terminal to have an analog speed-specifying signal in analog amount specifying the rotational speed of the motor input thereto; a second input terminal to have a digital speed-specifying signal in digital amount specifying the rotational speed of the motor input thereto; a reference voltage circuit that generates a reference voltage corresponding to the analog speed-specifying signal and/or the digital speed-specifying signal; a comparator that compares a speed voltage corresponding to the actual rotational speed of the motor and the reference voltage; and a control signal generator that generates and outputs a control signal for controlling the amount of current flowing through the drive coil based on the comparing result of the comparator.
대표청구항
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The invention claimed is: 1. A motor speed control integrated circuit which controls a rotational speed of a motor by controlling the amount of current flowing through a drive coil of the motor, the integrated circuit comprising: a first input terminal to have an analog speed-specifying signal in a
The invention claimed is: 1. A motor speed control integrated circuit which controls a rotational speed of a motor by controlling the amount of current flowing through a drive coil of the motor, the integrated circuit comprising: a first input terminal to have an analog speed-specifying signal in analog amount specifying the rotational speed of the motor input thereto; a second input terminal to have a digital speed-specifying signal in digital amount specifying the rotational speed of the motor input thereto; a reference voltage circuit that generates a reference voltage corresponding to the analog speed-specifying signal, when only the analog speed-specifying signal is input to the first input terminal, and that generates a reference voltage corresponding to the digital speed-specifying signal, when only the digital speed-specifying signal is input to the second input terminal, and that generates a reference voltage corresponding to the analog speed-specifying signal and the digital speed-specifying signal, when the analog speed-specifying signal and the digital speed-specifying signal are input to the first input terminal and the second input terminal, respectively; a comparator that compares a speed voltage corresponding to the actual rotational speed of the motor and the reference voltage; and a control signal generator that generates and outputs a control signal for controlling the amount of current flowing through the drive coil based on the comparing result of the comparator. 2. The motor speed control integrated circuit according to claim 1, wherein the analog speed-specifying signal is a direct-current voltage to specify the rotational speed of the motor, and wherein the reference voltage circuit generates the reference voltage corresponding to the direct-current voltage, when only the analog speed-specifying signal is input to the first input terminal. 3. The motor speed control integrated circuit according to claim 1, wherein the analog speed-specifying signal is a divided voltage produced by division of a direct-current voltage with a series connection of a register and a thermistor to which the direct-current voltage is applied, and wherein the reference voltage circuit generates the reference voltage corresponding to the divided voltage, when only the analog speed-specifying signal is input to the first input terminal. 4. The motor speed control integrated circuit according to claim 1, wherein the digital speed-specifying signal is a pulse width modulation signal from a processor to specify the rotational speed of the motor, and wherein the reference voltage circuit generates the reference voltage corresponding to the pulse width modulation signal, when only the digital speed-specifying signal is input to the second input terminal. 5. The motor speed control integrated circuit according to claim 1, wherein the analog speed-specifying signal is a direct-current voltage to specify the rotational speed of the motor, and wherein the digital speed-specifying signal is a pulse width modulation signal from a processor to specify the rotational speed of the motor, and wherein the reference voltage circuit generates the reference voltage that is a voltage corresponding to the pulse width modulation signal and having the direct-current voltage superimposed thereon, when the analog speed-specifying signal and the digital speed-specifying signal are input to the first input terminal and the second input terminal, respectively. 6. The motor speed control integrated circuit according to claim 1, comprising two chips of: a first circuit integrated that makes a current flow through the drive coil of the motor thereby driving the motor; a second circuit integrated that includes the first and second input terminals; the reference voltage circuit; the comparator; and the control signal generator, and controls the amount of current flowing through the drive coil of the motor via the first circuit according to the control signal generated by the control signal generator thereby controlling the rotational speed of the motor. 7. The motor speed control integrated circuit according to claim 1, which is an integrated chip of: a first circuit that makes a current flow through the drive coil of the motor thereby driving the motor; and a second circuit that includes the first and second input terminals; the reference voltage circuit; the comparator; and the control signal generator and controls the amount of current flowing through the drive coil of the motor via the first circuit according to the control signal generated by the control signal generator thereby controlling the rotational speed of the motor. 8. A motor speed controller which controls a rotational speed of a motor by controlling the amount of current flowing through a drive coil of the motor, the motor speed control comprising: a series connection of a resistor and a thermistor to which a direct-current voltage to specify the rotational speed of the motor is applied, the series connection dividing the direct-current voltage to provide a divided voltage a motor speed control integrated circuit comprising a first input terminal adapted to receive an analog speed-specifying signal specifying the rotational speed of the motor, the first input terminal receiving the divided voltage; a second input terminal adapted to receive a digital speed-specifying signal specifying the rotational speed of the motor; a reference voltage circuit that generates a reference voltage corresponding to the analog speed-specifying signal and/or the digital speed-specifying signal; a comparator that compares a speed voltage corresponding to the actual rotational speed of the motor and the reference voltage; and a control signal generator that generates and outputs a control signal for controlling the amount of current flowing through the drive coil based on the comparing result of the comparator, wherein the reference voltage circuit uses as the reference voltage the divided voltage. 9. A motor speed controller which controls a rotational speed of a motor by controlling the amount of current flowing through a drive coil of the motor, the motor speed control comprising: a motor speed control integrated circuit comprising a first input terminal adapted to receive an analog speed-specifying signal specifying the rotational speed of the motor; a second input terminal adapted to receive a digital speed-specifying signal specifying the rotational speed of the motor; a reference voltage circuit that generates a reference voltage corresponding to the analog speed-specifying signal and/or the digital speed-specifying signal; a comparator that compares a speed voltage corresponding to the actual rotational speed of the motor and the reference voltage; and a control signal generator that generates and outputs a control signal for controlling the amount of current flowing through the drive coil based on the comparing result of the comparator; a smoothing capacitor connected to the first input terminal; and a processor communication-feasibly connected to the second input terminal, wherein the digital speed-specifying signal applied to the second input terminal is a pulse width modulation signal specifying the rotational speed of the motor from the processor, and wherein the reference voltage circuit uses as the reference voltage a voltage produced by the smoothing capacitor smoothing the pulse width modulation signal input from the processor to the second input terminal. 10. A motor speed controller which controls a rotational speed of a motor by controlling the amount of current flowing through a drive coil of the motor, the motor speed control comprising: a series connection of a resistor and a thermistor to which a direct-current voltage to specify the rotational speed of the motor is applied, the series connection dividing the direct-current voltage to provide a divided voltage a motor speed control integrated circuit comprising: a first input terminal adapted to receive an analog speed-specifying signal specifying the rotational speed of the motor, the first input terminal receiving the divided voltage; a second input terminal adapted to receive a digital speed-specifying signal specifying the rotational speed of the motor, the second terminal receiving a pulse width modulation signal specifying the rotational speed of the motor; a reference voltage circuit that generates a reference voltage corresponding to the analog speed-specifying signal and/or the digital speed-specifying signal; a comparator that compares a speed voltage corresponding to the actual rotational speed of the motor and the reference voltage; and a control signal generator that generates and outputs a control signal for controlling the amount of current flowing through the drive coil based on the comparing result of the comparator; a smoothing capacitor connected to the first input terminal; and a processor communication-feasibly connected to the second input terminal, wherein the reference voltage circuit uses as the reference voltage the divided voltage applied to the first input terminal laid over a voltage produced by the smoothing capacitor smoothing the pulse width modulation signal input from the processor to the second input terminal.
이 특허에 인용된 특허 (1)
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Forster Ralf,DEX ; Fisch Alfons,DEX, Apparatus for regulating the flow of current through a load.
이 특허를 인용한 특허 (6)
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Yeh, Chin-Wen; Peng, Zhi-Jian; Sun, Hai-Shan, Fan controlling circuit.
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Yoshitomi, Tetsuya; Harashima, Takashi, Fan motor speed control circuit, fan apparatus, and electronic apparatus.
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Matsuo, Yosuke; Takeuchi, Shigeru; Sato, Taketoshi, Load control apparatus and method for processing diagnosis signal for the same.
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Omura, Takehide, Motor controller.
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Maeto, Hidemi; Suzuki, Shunji, Motor driving integrated circuit.
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Ouchi, Mikihiro; Murakami, Yutaka; Kimura, Tomohiro, Transmission device, transmission method, receiving device and receiving method.
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