Control unit for driving a regulating transistor of a fan arrangement
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H02P-001/26
H02P-001/42
H02P-001/16
H02P-003/18
H02P-023/00
H02P-025/00
출원번호
US-0834756
(2004-04-29)
등록번호
US-7279864
(2007-10-09)
우선권정보
DE-103 19 557(2003-04-30)
발명자
/ 주소
Busch,Peter
출원인 / 주소
Fujitsu Siemens Computers GmbH
대리인 / 주소
Cohen Pontani Lieberman & Pavane LLP
인용정보
피인용 횟수 :
0인용 특허 :
4
초록▼
A control unit for driving a regulating transistor (2) of a fan arrangement, in which the regulating transistor (2) is connected in series with an electronically commutated fan (1), having control means (5, 6, R1, R2) for the analog driving of the regulating transistor (2) with a control signal (Uco
A control unit for driving a regulating transistor (2) of a fan arrangement, in which the regulating transistor (2) is connected in series with an electronically commutated fan (1), having control means (5, 6, R1, R2) for the analog driving of the regulating transistor (2) with a control signal (Ucontrol) in a manner dependent on a control input voltage (Uin). The control unit comprises compensation means (R3, R4) for influencing the control signal (Ucontrol) in a manner dependent on an AC voltage component (UAC) of an operating voltage (UB) of the fan arrangement, so that the AC voltage component (UAC) of the operating voltage (UB) is completely or partially compensated for in a voltage across the fan (1).
대표청구항▼
I claim: 1. In a control unit for driving a regulating transistor of a fan arrangement powered by an operating voltage, in which the regulating transistor is connected in series with an electronically commutated fan, having control means for analog driving of the regulating transistor with a contro
I claim: 1. In a control unit for driving a regulating transistor of a fan arrangement powered by an operating voltage, in which the regulating transistor is connected in series with an electronically commutated fan, having control means for analog driving of the regulating transistor with a control signal in a manner dependent on a control input voltage, the improvement comprising: compensation means for changing the control signal based on an AC voltage component of the operating voltage of the fan arrangement, so that the AC voltage component of the operating voltage is at least partially compensated for in a voltage across the fan. 2. The control unit as claimed in claim 1, wherein the compensation means interact with an operational amplifier, the control input voltage being passed to one input and the operating voltage being passed to the other input. 3. The control unit as claimed in claim 2, wherein the operating voltage is passed to the other input via a voltage divider having a third and fourth resistor. 4. The control unit as claimed in claim 1, wherein a control transistor is provided and is connected to a control output for the driving of the regulating transistor. 5. The control unit as claimed in claim 4, wherein the control transistor, for its driving, is connected to the output of an operational amplifier. 6. The control unit as claimed in claim 5, wherein the control output is connected to the control transistor and, via a first resistor, to one input of the operational amplifier and said one input is additionally connected to a second resistor, for receiving the control input voltage. 7. The control unit as claimed in claim 1, wherein an increase in the control input voltage effects a reduction of the fan rotational speed. 8. The control unit as claimed in claim 4, wherein an increase in the control input voltage effects a reduction of the fan rotational speed. 9. The control unit as claimed in claim 3, wherein the control output is connected to the control transistor and, via a first resistor, to one input of an operational amplifier and said one input is additionally connected to a second resistor, for receiving the control input voltage; and wherein the ratio of the first to the second resistor is equal to the ratio of the third to the fourth resistor. 10. The control unit as claimed in claim 1, wherein the control unit is formed as an integrated circuit. 11. A fan arrangement having terminals for feeding in an operating voltage, an electronically commutated fan and a regulating transistor connected in series with the latter, featuring a control unit as claimed in claim 1. 12. The fan arrangement as claimed in claim 11, wherein a rotational speed detection circuit is provided, which evaluates changes in the fan current caused by commutations of the fan, carries out a desired value comparison and, for the purpose of regulating the fan rotational speed, applies a control input voltage to the control means for driving the regulating transistor. 13. The fan arrangement as claimed in claim 12, wherein the rotational speed detection circuit is connected to a current measuring resistor arranged in the current path of the fan. 14. The fan arrangement as claimed in claim 11, wherein the fan is connected between the operating voltage and the regulating transistor, which feeds a regulated voltage to the fan. 15. The fan arrangement as claimed in claim 12, wherein the fan is connected between the operating voltage and the regulating transistor, which feeds a regulated voltage to the fan. 16. The fan arrangement as claimed in claim 15, wherein the regulating transistor is connected as a voltage follower.
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이 특허에 인용된 특허 (4)
Yaguchi Osamu (Kashiwazaki JPX) Arakawa Mitsunori (Kashiwazaki JPX), Control circuit for a DC motor.
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