CN2454987Y - Fan motor of controlling rotational speed by pulse working period - Google Patents
Fan motor of controlling rotational speed by pulse working period Download PDFInfo
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- CN2454987Y CN2454987Y CN00257481U CN00257481U CN2454987Y CN 2454987 Y CN2454987 Y CN 2454987Y CN 00257481 U CN00257481 U CN 00257481U CN 00257481 U CN00257481 U CN 00257481U CN 2454987 Y CN2454987 Y CN 2454987Y
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- voltage
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- impulse wave
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Abstract
The utility model relates to a fan motor of controlling rotational speed by pulse working periods. The utility model mainly comprises two rectifying circuits, a voltage comparison circuit and a differential amplifier; a pulse wave is input into a first rectifying circuit, actual rotation speed signals detected and output by a fan are input into the first rectifying circuit, the pulse wave and the rotation speed signals are compared in voltage in the voltage comparison circuit, after comparison by the voltage comparison circuit, a comparison voltage is output to the negative end of the differential amplifier, a divided voltage of a power voltage Vcc is connected with the positive end of the differential amplifier, the differential amplifier calculates the two input voltages and outputs a driving voltage Vf, and the change of the value of the driving voltage Vf can simultaneously change the rotation speed of the fan.
Description
The relevant a kind of fan electromotor of the utility model with impulse wave work period control rotating speed, particularly relevant input one impulse wave, under the situation that does not change this pulse wave frequency, by changing the impulse wave work period with the control rotation speed of the fan, and make fan smooth rotation in the process that increases rotating speed or turn reducing speed, to prolong fan useful life.
The traditional heat-dissipating fan is in No. 198511 " temperature speed control formula brush DC radiator fan " novel patent case of Taiwan patent announcement of bulletin on January 2nd, 1993, shown in Fig. 1 and Fig. 2 A to Fig. 2 C.Fig. 1 discloses fan speed control circuit diagram, and Fig. 2 A to Fig. 2 C discloses the output waveform figure of fan speed control circuit.Behind power turn-on, to press protection diode D1 via contrary, and add on circuit and the fan brushless electric machine, the mutual induction effect of mat winding coil and annular permanent magnnet makes fan blade begin to rotate; At this moment, the Hall effect inducting IC IC1 by direct current machine commutation application point provides certain electric current and DC potential via resistance R 3, R2, can sense the changes of magnetic field electric wave between fan winding coil and the annular permanent magnnet.This Hall effect inducting IC IC1 output positive voltage V+ and negative voltage V-are to drive integrated circult IC2, this drive integrated circult IC2 obtains being same as the F.G. waveform shown in Fig. 2 A with aforementioned two waveforms through builtin voltage comparison shaping processing, and the electric wave of being exported with this homophase electric wave control semiconductor switch A1 and A2, shown in Fig. 2 B and Fig. 2 C.The electric wave control fan electromotor winding L 1, L2, L3 and the L4 (winding coil) that utilize semiconductor switch A1 and A2 to be exported produce the commutation action with magnetic couple (annular permanent magnnet).Timing capacitor C1 is then stopping to the electric energy of resetting again after fully motionless for drive integrated circult IC2 itself provides flabellum, it can make fan running by the drive system that Hall effect inducting IC IC1 and drive integrated circult IC2 are constituted, and sends the cycle clock pulse signal of feedback.IC3 (not indicating) inside is by three operational amplifier IC31, IC32 and IC33 form, wherein this IC31 and resistance R 4, R5, R6, R7, R8, R9, R10 and temperature control speed change inductor Rth form the rotating speed and the temperature slope control circuit of fan temperature control speed change, by this temperature control speed change inductor Rth characteristic that its resistance value also changes under different temperatures, temperature control speed change inductor Rth and resistance R 4 formed voltage Va are also varied with temperature and change, itself and resistance R 9 and the formed reference voltage Vref of R10 are after operational amplifier IC31 computing, make the Vb change in voltage, transistor T R2 conducting electric current also changes, and then rotation speed of the fan changes and reaches the purpose of temperature control speed change.Yet the waveform that exports winding L 1, L2, L3 and L4 to via drive integrated circult IC2 No. 198511 is a rectangular wave, shown in Fig. 2 B and Fig. 2 C; Though the Vb change in voltage of exporting according to ambient temperature via operational amplifier IC31 changes transistor T R2 conducting electric current in addition, this transistor T R2 still exports rectangular wave.Because the input rectangular wave makes fan rotate along with rectangular wave takes place by anxious speedup or anxious the deceleration to winding L 1, L2, L3 and L4, this moment, rotation speed of the fan caused rocking because of taking place to change rapidly, and then made fan minimizing in useful life.
Another traditional heat-dissipating fan is in No. 327486 " the wide modulation control circuit of brush DC fan ripple " novel patent case of Taiwan patent announcement of bulletin on February 21st, 1998, as shown in Figures 3 and 4.Fig. 3 discloses control circuit figure; Fig. 4 discloses the output waveform figure of control switch.Please refer to shown in Figure 3, disclosing this rectification circuit 10 for No. 327486 is to constitute the high-pass filtering network with electric capacity 11 and a resistance 14, and with two diodes 12,13 and filter capacitor 15 constitute rectifying and wave-filterings, and the square-wave signal that makes reception can be exchanged into d. c. voltage signal, and the adding of this high-pass filtering network, can make the output voltage can be with the proportional relationship change of frequency, so, can measure fan 50 rotating speeds by the output voltage of rectification circuit 10, be connected in series with one fen piezoelectricity group and form and the reference voltage of this supply voltage comparator 20 is thermistors 40 by a negative temperature coefficient, obtain a reference voltage level by its dividing potential drop end points place, and the design of this thermistor 40, can make it have effect temperature compensation concurrently, also promptly when ambient temperature raises, then make the impedance of thermistor 40 descend relatively, also promptly make the reference voltage that is fed through voltage comparator 20 raise (heightening speed reference), so, can make fan 50 maintain the higher rotation speed state; Otherwise, if the environment temperature is low to moderate standard value when following, also correspondingly make speed reference decline, promptly keep fan than low speed state.These control switch 30 output waveforms form the rotating-speed control circuit of the wide modulation of a kind of ripple as shown in Figure 4.Yet, No. 327486 outputting drive voltage V+ waveform is the intermittent rectangular wave that opens and closes, and anxious speedup or anxious the deceleration take place in the keying that fan 50 rotates along with rectangular wave or control switch 30, and this moment, rotation speed of the fan caused rocking because of taking place to change rapidly, and then make fan minimizing in useful life.
The purpose of this utility model provides a kind of work period with impulse wave and controls the fan electromotor of rotating speed, it utilizes input one impulse wave and detects fan rotating speed signals relatively, this impulse wave frequency is constant and utilize the work period to change the control rotating speed and export a voltage that forms smooth waveform, make mild speedup of rotation speed of the fan or deceleration, it avoids taking place anxious speedup of rotation speed of the fan or anxious the deceleration, to prolong fan useful life.
The utility model is achieved in that a kind of fan electromotor with impulse wave work period control rotating speed, and it is characterized in that: this fan electromotor includes: a fan, and it can detect output one fan rotating speed signals for converting voltage to; One input pulse end, it can import the constant impulse wave of a frequency for converting voltage to; One voltage comparator circuit, it can be relatively detects the voltage that voltage that output signal converts to and input pulse ripple convert to by fan, and exports a comparative voltage; And a differential amplifier, it is connected between fan and this voltage comparator circuit, its anode input supply voltage Vcc and negative terminal input comparative voltage changes the driving voltage Vf that exports fan to according to the voltage difference of input differential amplifier anode and negative terminal; Impulse wave voltage is reduced, when this impulse wave voltage reduces gradually, voltage comparator circuit can be exported the negative terminal of the voltage of rising gradually to this differential amplifier, and the driving voltage VfF of this differential amplifier output is reduced gradually gently, thereby this fan electromotor can slow down gently; When wherein the work period of this impulse wave increases, impulse wave voltage is raise, when this impulse wave voltage raises gradually, voltage comparator circuit can be exported gradually the voltage that reduces raises the driving voltage Vf of this differential amplifier output to the negative terminal of this differential amplifier gradually gently, thereby this fan electromotor speedup gently.
This impulse wave is a square wave, also can be triangular wave.
Other comprises one first rectification circuit and one second rectification circuit, this first rectification circuit is connected between voltage comparator circuit and the impulse wave input, it converts impulse wave to voltage, and second rectification circuit is connected in voltage comparator circuit and fan detects between the output signal end, and it detects output signal with fan and converts voltage to.
The piezoelectricity comparison circuit includes two resistance, an electric capacity and an operational amplifier.
Describe architectural feature of the present utility model and advantage in detail below in conjunction with preferred embodiment and accompanying drawing:
Fig. 1 is the fan speed control circuit diagram of No. the 198511st, Taiwan patent announcement.
Fig. 2 is the output waveform figure of the fan speed control circuit of No. the 198511st, Taiwan patent announcement.
Fig. 3 is the circuit diagram of No. the 327486th, Taiwan patent announcement.
Fig. 4 is the output waveform figure of the control switch of No. the 327486th, Taiwan patent announcement.
Fig. 5 is the circuit diagram of the utility model preferred embodiment square wave work period control.
Fig. 6 is the utility model preferred embodiment square wave control signal, fan detection output signal FG and the oscillogram that exports the voltage Vf of fan to.
Please refer to shown in Figure 5ly, the utility model is that it mainly is to comprise one first rectification circuit 60, one second rectification circuit 60 ', a voltage comparator circuit 70 and a differential amplifier 80 with the fan electromotor of impulse wave work period control rotating speed.This first rectification circuit 60 is located between voltage comparator circuit 70 and the impulse wave input Pulse, first rectification circuit 60 comprises an operational amplifier OP1, two resistance R 1, R2 and diode D1, voltage comparator circuit 70 includes two resistance R 5, R6, a capacitor C and an operational amplifier OP3.This impulse wave input pulse can be for input one frequency constant and changeable square wave of work period or triangular wave etc., and this impulse wave earlier after 60 rectifications of first rectification circuit output one voltage put into the negative terminal of device OP3 to the computing of voltage comparator circuit 70.This second rectification circuit 60 ' is located at voltage comparator circuit 70 and is detected between the input FG of output fan rotating speed signals, and this second rectification circuit comprises an operational amplifier OP2, two resistance R 3, R4 and diode D2.The tach signal FG that detects output by fan 90 exports the anode of a voltage to the operational amplifier OP3 of voltage comparator circuit 70 after the 60 ' rectification of second rectification circuit.This voltage comparator circuit 70 is compared the pulse voltage after the rectification with tach signal voltage, relatively output one comparative voltage in back is connected to the negative terminal of differential amplifier 80 through a resistance R 7, after a resistance R 9 dividing potential drops, be connected to the anode of differential amplifier 80 in addition with power source voltage Vcc, by differential amplifier 80 power source voltage Vcc of anode is added and subtracted back output one driving voltage Vf mutually with the comparative voltage of negative terminal, this driving voltage Vf can be for the rotating speed of control fan, when the work period of input pulse ripple changes, promptly produce simultaneously through the comparative voltage of voltage comparator circuit after relatively and to change, therefore the comparative voltage that changes is added and subtracted by differential amplifier 70 mutually with the dividing potential drop of power Vcc again, then its driving voltage Vf that exports also changes, because the duty cycle variation of this impulse wave (increase or shorten), make the comparative voltage of voltage comparator circuit 70 outputs produce mild decline or rising, thereby also mild thereupon rising of the driving voltage Vf of differential amplifier 80 outputs or decline, and then make the rotating speed of fan 90 also form mild speedup or deceleration, therefore can avoid taking place anxious speedup of rotation speed of the fan or anxious the deceleration, fan is prolonged useful life.
Please refer to shown in Figure 6, impulse wave input in the utility model preferred embodiment is imported a square wave, this square wave setpoint frequency is constant and only change the work period, and extend on time shaft with high voltage (operating voltage) and to be denoted as Hi, extend on time shaft with low-voltage and to be denoted as Lo, and this time shaft set the Hi=3Lo district respectively, Hi=Lo district and Hi=9Lo district.When square wave forms the Hi=3Lo district, square wave is higher than the tach signal FG that fan detects output through the voltage that first rectification circuit 60 exports voltage comparator circuit 70 negative terminals to, export the voltage of voltage comparator circuit 70 anodes to through second rectification circuit 60 ', therefore, these voltage comparator circuit 70 output LOW voltages are to the negative terminal of differential amplifier 80, and make the higher driving voltage Vf of these differential amplifier 80 outputs.When the square wave work period when the Hi=3Lo district reduces to the Hi=Lo district, its frequency is constant, square wave is then reduced by original voltage gradually through the voltage that first rectification circuit 60 exports voltage comparator circuit 70 negative terminals to, therefore, this voltage comparator circuit the negative terminal of the voltage that raises gradually of 0 output to differential amplifier 80, and this differential amplifier 80 outputting drive voltage Vf are reduced gradually gently.When square wave forms the Hi=Lo district, the frequency that fan is imported the fan detection output speed signal FG of second rectification circuit 60 ' reduces, therefore, the voltage of voltage comparator circuit 70 anodes is greater than negative terminal, form the negative terminal of these voltage comparator circuit 70 exportable high voltages, and make the lower driving voltage Vf of these differential amplifier 80 outputs to differential amplifier.When the work period broadens and makes square wave when the Hi=Lo district increases to the Hi=9Lo district, its frequency is constant, and exporting the voltage of voltage comparator circuit 70 negative terminals to through first rectification circuit 60, square wave raises gradually by original voltage, therefore, this voltage comparator circuit 70 is exported the negative terminal of the voltage of reduction gradually to differential amplifier 80, and this differential amplifier 80 outputting drive voltage Vf are raise gradually gently.When square wave forms the Hi=9Lo district, the voltage that square wave exports voltage comparator circuit 70 negative terminals to through first rectification circuit 60 is higher than tach signal FG that fan detects output exports voltage comparator circuit 70 anodes to through second rectification circuit 60 ' voltage, therefore, these voltage comparator circuit 70 output LOW voltages make the higher driving voltage Vf of these differential amplifier 80 outputs to the negative terminal of differential amplifier 80.
The utility model is constant and only change the work period by the pulse wave frequency, make fan remain on a desired speed with the control rotation speed of the fan, or controlling fan when rotating speed speeds or slow down, its driving voltage Vf gently rises or descends, thereby makes the rotating speed speedup or the deceleration gently of fan.
Referring again to Fig. 2, Fig. 4, shown in Figure 6, the driving voltage of announcing No. 198511 and No. 327486 forms square wave, makes anxious speedup of rotation speed of the fan or anxious the deceleration, and this moment, rotation speed of the fan caused rocking because of taking place to change rapidly, and then fan is reduced useful life.Opposite, the utility model is made comparisons with a voltage comparator circuit input pulse ripple and tach signal, voltage relatively inputs to the negative of differential amplifier and kicks, and the power source voltage Vcc dividing potential drop inputs to just kicking of differential amplifier, this differential amplifier is added and subtracted the mild driving Vf of back output mutually with two voltages, makes mild speedup of rotation speed of the fan or deceleration.
Claims (5)
1, a kind of fan electromotor with impulse wave work period control rotating speed, it is characterized in that: this fan electromotor includes: a fan, it can detect output one fan rotating speed signals for converting voltage to; One input pulse end, it can import the constant impulse wave of a frequency for converting voltage to; One voltage comparator circuit, it can be relatively detects the voltage that voltage that output signal converts to and input pulse ripple convert to by fan, and exports a comparative voltage; And a differential amplifier, it is connected between fan and this voltage comparator circuit, its anode input supply voltage Vcc and negative terminal input comparative voltage changes the driving voltage Vf that exports fan to according to the voltage difference of input differential amplifier anode and negative terminal.
2, the fan electromotor with impulse wave work period control rotating speed as claimed in claim 1, it is characterized in that: this impulse wave is a square wave.
3, the fan electromotor with impulse wave work period control rotating speed as claimed in claim 1, it is characterized in that: this impulse wave is a triangular wave.
4, the fan electromotor with impulse wave work period control rotating speed as claimed in claim 1, it is characterized in that: other comprises one first rectification circuit and one second rectification circuit, this first rectification circuit is connected between voltage comparator circuit and the impulse wave input, it converts impulse wave to voltage, and second rectification circuit is connected in voltage comparator circuit and fan detects between the output signal end, and it detects output signal with fan and converts voltage to.
5, the fan electromotor with impulse wave work period control rotating speed as claimed in claim 1, it is characterized in that: the piezoelectricity comparison circuit includes two resistance, an electric capacity and an operational amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00257481U CN2454987Y (en) | 2000-11-06 | 2000-11-06 | Fan motor of controlling rotational speed by pulse working period |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00257481U CN2454987Y (en) | 2000-11-06 | 2000-11-06 | Fan motor of controlling rotational speed by pulse working period |
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| Publication Number | Publication Date |
|---|---|
| CN2454987Y true CN2454987Y (en) | 2001-10-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN00257481U Expired - Lifetime CN2454987Y (en) | 2000-11-06 | 2000-11-06 | Fan motor of controlling rotational speed by pulse working period |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7619380B2 (en) | 2007-04-12 | 2009-11-17 | Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd. | Method and apparatus for controlling rotational speed of fan |
| CN102042250A (en) * | 2009-10-20 | 2011-05-04 | 鸿富锦精密工业（深圳）有限公司 | Fan control system |
| CN101603543B (en) * | 2008-06-10 | 2011-06-29 | 陞达科技股份有限公司 | Method for setting rotating speed of fan by utilizing RC frequency |
| CN102244491A (en) * | 2011-07-08 | 2011-11-16 | 惠州Tcl移动通信有限公司 | DC (direct current) motor control circuit and method of mobile phone |
| CN104661170A (en) * | 2015-03-09 | 2015-05-27 | 山东省计算中心（国家超级计算济南中心） | Fault detection system for multiple speakers |
| CN109596981A (en) * | 2019-01-07 | 2019-04-09 | 东华大学 | A kind of Voltage Feedback system of automotive electronics throttle motor performance test |
| CN114909313A (en) * | 2022-05-12 | 2022-08-16 | 常州同惠电子股份有限公司 | Circuit for automatically controlling rotating speed of fan in real time during temperature change of detection point |
-
2000
- 2000-11-06 CN CN00257481U patent/CN2454987Y/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7619380B2 (en) | 2007-04-12 | 2009-11-17 | Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd. | Method and apparatus for controlling rotational speed of fan |
| CN101603543B (en) * | 2008-06-10 | 2011-06-29 | 陞达科技股份有限公司 | Method for setting rotating speed of fan by utilizing RC frequency |
| CN102042250A (en) * | 2009-10-20 | 2011-05-04 | 鸿富锦精密工业（深圳）有限公司 | Fan control system |
| CN102244491A (en) * | 2011-07-08 | 2011-11-16 | 惠州Tcl移动通信有限公司 | DC (direct current) motor control circuit and method of mobile phone |
| CN102244491B (en) * | 2011-07-08 | 2015-05-13 | 惠州Tcl移动通信有限公司 | DC (direct current) motor control circuit and method of mobile phone |
| CN104661170A (en) * | 2015-03-09 | 2015-05-27 | 山东省计算中心（国家超级计算济南中心） | Fault detection system for multiple speakers |
| CN109596981A (en) * | 2019-01-07 | 2019-04-09 | 东华大学 | A kind of Voltage Feedback system of automotive electronics throttle motor performance test |
| CN109596981B (en) * | 2019-01-07 | 2021-05-11 | 东华大学 | Voltage feedback system for testing performance of motor of automobile electronic throttle valve |
| CN114909313A (en) * | 2022-05-12 | 2022-08-16 | 常州同惠电子股份有限公司 | Circuit for automatically controlling rotating speed of fan in real time during temperature change of detection point |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Kunshan Guangxing Electronics Co., Ltd. Assignor: Jianzhun Electric Motor Industry Co., Ltd. Contract fulfillment period: In November 6, 2010, the patent expired Contract record no.: 031000030108 Denomination of utility model: Fan motor with speed controlled by pulse wave working cycle Granted publication date: 20011017 License type: General permission Record date: 2003.5.29 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: COMMON LICENCE; TIME LIMIT OF IMPLEMENTING CONTACT: 2010.11.6, EXPIRATION OF PATENT RIGHT Name of requester: KUNSHAN GUANGXING ELECTRONICS CO., LTD. Effective date: 20030529 |
|
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Kunshan Guangxing Electronics Co., Ltd. Assignor: Jianzhun Electric Motor Industry Co., Ltd. Contract fulfillment period: November 6, 2010 Contract record no.: 031000030108 Denomination of utility model: Fan motor with speed controlled by pulse wave working cycle Granted publication date: 20011017 License type: General permission Record date: 20030529 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: COMMON LICENCE; TIME LIMIT OF IMPLEMENTING CONTACT: 2010.11.6 Name of requester: KUNSHAN GUANGXING ELECTRONICS CO., LTD. Effective date: 20030529 |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20101106 Granted publication date: 20011017 |