CN101232265A - Current limiting protection control structure for reducing motor switch noise - Google Patents
Current limiting protection control structure for reducing motor switch noise Download PDFInfo
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- CN101232265A CN101232265A CNA2007100024754A CN200710002475A CN101232265A CN 101232265 A CN101232265 A CN 101232265A CN A2007100024754 A CNA2007100024754 A CN A2007100024754A CN 200710002475 A CN200710002475 A CN 200710002475A CN 101232265 A CN101232265 A CN 101232265A
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- 230000008447 perception Effects 0.000 claims description 23
- 238000010586 diagram Methods 0.000 description 7
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- 238000005516 engineering process Methods 0.000 description 2
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Abstract
The invention relates to a limiting-current protection control structure for lowering switching stray noise of a motor. The limiting-current protection control structure mainly comprises: a motor winding; a driving unit, which is electrically connected with the motor winding to drive the motor composed of the motor winding to operation; a sensing unit, which is electrically connected with the motor winding, wherein the sensing unit detects a driving level for flowing through the motor winding, compares a preset referenced level of the sensing unit according the driving level, and outputs an identification signal; a control unit, which is electrically connected with the driving unit, the sensing unit and a Hall component, wherein the control unit adjusts the driving level that is output to the motor winding by the driving unit, so as to lead the output of the driving unit to keep a fundamental working period.
Description
Technical field
What the present invention relates to is a kind of control structure, particularly be the noise that the accurate position of a kind of driving voltage by the restriction motor is produced when stoping its running.
Background technology
General prior art is to utilize the ON time of the coil windings in pulse width modulation signal (hereinafter to be referred as pwm signal) the control radiator fan motor, rotation with the control radiator fan motor, and reach the control purpose of different rotating speeds according to the pwm signal different operating cycle (hereinafter to be referred as DUTYCYCLE), amplitude, frequency and the work period variablees such as (DUTYCYCLE) of taking off the pwm signal of technology before only all can influence the rotating speed of fan motor.
Moreover to see also Fig. 1 be first kind of available circuit; be to include the contrary protection diode 101 of pressing as shown in the figure; Hall subassembly 102; driven unit 103; the first transistor 104; transistor seconds 105; first resistance 106; second resistance 107; the 3rd resistance 108 and the first motor winding 109; the second motor winding 120; the 4th resistance 121; the 5th resistance 122 and the 3rd transistor 123; the 4th transistor 124, described Hall subassembly 102; driven unit 103; the first transistor 104; transistor seconds 105; first resistance 106; second resistance 107; the 3rd resistance 108 and the first motor winding 109; the second motor winding 120 is formed drive circuit 10.
When power turn-on after by after adding to circuit against pressure protection diode 101; pole change generation positive voltage H+ and negative voltage H-that the Hall subassembly 102 of drive circuit 10 detects rotor export driven unit 103 to; convert aforesaid voltage to the controlling signal source via driven unit 103 and export the first transistor 104 and transistor seconds 105 to through the first output OUT1 and the second output OUT2; one pulse width modulation signal input PWM is through the collection utmost point of the 4th resistance 121 the 5th resistance 122 and the 3rd transistor 123 the 4th transistor 124; cut off first output OUT1 of driven unit 103 and the controlling signal source of the second output OUT2; with first motor winding 109 and the second motor winding 120 of control connection at the collection utmost point of the first transistor 104 and transistor seconds 105, and then the rotation speed change of control fan motor.
Please consulting Fig. 2 again is second kind of available circuit; be to include the contrary protection diode 201 of pressing as shown in the figure; Hall subassembly 202; driven unit 203; the first transistor 204; transistor seconds 205; first resistance 206; second resistance 207; the 3rd resistance 208 and the first motor winding 209; the second motor winding 220; the 4th resistance 221; with the 3rd transistor 222; wherein said Hall subassembly 202; driven unit 203; the first transistor 204; transistor seconds 205; first resistance 206; second resistance 207; the 3rd resistance 208 and the first motor winding 209; the second motor winding 220 is to form drive circuit 20; one pulse width modulation signal input PWM is connected the control input end ST of driven unit 203 through the 4th resistance 221 and the 3rd transistor 222; by the pulse width modulation signal cyclic variation; work period (DUTYCYCLE) control Driver Circuit 20 that changes arteries and veins modulation signal produces the switch start time; to control the first motor winding 218; the power of the second motor winding 219, and then the rotation speed change of control fan motor.
Please consulting Fig. 3 again is the third available circuit; a contrary pressure protected diode 301 as shown in the figure; Hall subassembly 302; driven unit 303; the first transistor 304; transistor seconds 305; first resistance 306; second resistance 307; the 3rd resistance 308 and the first motor winding 309; the second motor winding 320 is formed drive circuit 30; one pulse width modulation signal input PWM makes to be connected the first transistor 304 and the first motor winding 309 of the transistor seconds 305 collection utmost points and the rotating speed of 320 drivings of the second motor winding and then control fan motor through the Kai Heguan of the 4th resistance 321 and the 3rd transistor 322 control input power supplys.
Please refer to Fig. 4; it is the corresponding waveform of taking off prior art pwm signal and electric current (hereinafter to be referred as winding current) unit interval by aforementioned motor winding (being the above-mentioned first motor winding 309 and the second motor winding 320) before showing; yet; when described prior art needs the standard position of the aforementioned motor winding current of restricted circulation according to various application; owing to starting the current-limiting protection function, described driven unit cause the PWM signal of 25kHz to be closed; hang down up to aforementioned winding current and to fix the position in advance; the PWM signal that only so has a plurality of 25kHz disappears; cause the frequency of its PWM to be reduced to below the 20kHz, can produce the motor switching noise.Therefore, be necessary the shortcoming of prior art is improved.
Summary of the invention
Main purpose of the present invention is to be; a kind of current limiting protection control structure that reduces motor switch noise is provided; can adjust the accurate position of driving of motor by the accurate position of reference of setting perception unit, reach the tachometer value and the change in rotational speed scope of the fan motor of institute's desire setting.
Of the present invention time a purpose is to be; the accurate position of driving that provides a kind of current limiting protection control structure utilization that reduces motor switch noise to limit motor by perception unit output distinguishing signal; make the accurate position or/and the work period (DUTYCYCLE) of control unit change CD-ROM drive motor, the noise that causes people's ear to respond to reach the frequency variation of avoiding the generation of motor running frequency width modulation signal.
In order to achieve the above object, the technical solution adopted in the present invention is, a kind of current limiting protection control structure that reduces motor switch noise is provided, and is to mainly include: a motor winding; One driver element is to be electrically connected the said motor winding, to drive the motor operation that aforementioned motor winding is constituted; One perception unit is to be electrically connected described motor winding, detects accurate of the preset reference and the output distinguishing signal of the accurate position of driving and the more described according to this perception unit of the aforementioned motor winding of flowing through; One control unit, be to be electrically connected above-mentioned driver element, aforementioned perception unit and a Hall subassembly, and described control unit is adjusted the accurate position of driving that above-mentioned driver element exports aforementioned motor winding to according to the distinguishing signal of described perception unit output, and described driver element output is still kept a basic work period.
A kind of " reducing the current limiting protection control structure of motor switch noise " provided by the present invention has following advantage:
1. adjust the accurate position of driving of motor by the accurate position of the reference of setting the perception unit, reach the tachometer value and the change in rotational speed scope of the fan motor of institute's desire setting, significantly reduce the error that the frequency variation because of pulse width modulation signal causes, produce the skew of fan motor rotating speed, also promptly significantly reduce the influence that the fan motor rotating speed is subjected to work period (DUTYCYCLE) variation of pulse width modulation signal.
2. utilize the accurate position of driving of perception unit detecting motor and export distinguishing signal; the work period of still keeping a minimum when making control unit change the accurate position of CD-ROM drive motor, the pwm signal that transfers to driver element 20 when guaranteeing to start the current-limiting protection function can not hang down the noise that causes people's ear to respond at 25kHz.
Description of drawings
Fig. 1 is first kind of available circuit schematic diagram;
Fig. 2 is second kind of available circuit schematic diagram;
Fig. 3 is the third available circuit schematic diagram;
Fig. 4 is the prior art pwm signal and passes through aforementioned motor winding waveform schematic diagram;
The circuit diagram of Fig. 5 the present invention one possible embodiments;
Fig. 6, Fig. 7 are the feasible circuit diagram of the present invention;
Fig. 8 is for pwm signal of the present invention and by aforementioned motor winding waveform schematic diagram.
Description of reference numerals: 10-motor winding; The 11-first motor winding; The 12-second motor winding; The 20-driver element; 30-perception unit; 31-first resistance; 32-second resistance; 33-the 3rd resistance; The 40-control unit; The 41-first pulse-width modulation output; The 42-second pulse-width modulation output; The 50-Hall subassembly; The 60-power supply.
Embodiment
For other advantage of the present utility model, purpose, technical characterictic and effect, be can be by the detailed description of the graphic this case preferred embodiment of following cooperation.
Please refer to Fig. 5 (can cooperate with reference to other each graphic), show the possible embodiments that the present invention " reduces the current limiting protection control structure of motor switch noise ", mainly comprise: a motor winding 10 (that the motor (not being presented at figure) that aforementioned winding 10 is constituted can be is single-phase, two-phase, three-phase motor); One driver element 20 is to be electrically connected said motor winding 10, to drive the motor operation that aforementioned motor winding 10 is constituted; One perception unit 30, be to be electrically connected described motor winding 10 (or being located at described motor), detecting the flow through accurate position of driving (electric current or/with voltage) of aforementioned motor winding 10 and the accurate position of preset reference of more described according to this perception unit 30 when producing (user or can be set or regulate), and can export distinguishing signal according to comparative result.
One control unit 40, be to be electrically connected above-mentioned driver element 20, (and aforementioned each unit or assembly all can be electrically connected a power supply 60 for an aforementioned perception unit 30 and a Hall subassembly 50, to obtain the required energy of start), not only can by receive described Hall subassembly 50 the pole change that produces when detecting motor running produce positive voltage H+ and negative voltage H-signal, more can adjust the accurate position of driving that above-mentioned driver element 20 exports aforementioned motor winding 10 to according to the distinguishing signal of described perception unit 30 outputs, change within the specific limits with the rotating speed that limits described motor winding 10, and make described driver element 20 keep the work period of a minimum (as 5%PWM signal pulsewidth), but the switch noise frequency of so keeping motor can not hanged down the people's ear induction range at 25kHz, so the noise can significantly reduce motor rotary speed and switch the time.Please cooperate with reference to the 6th, 7 figure (can cooperate again with reference to other each graphic) is to show a feasible application circuit structure (only not as limit), described control unit 40 has one first pulse-width modulation output 41, one second pulse-width modulation output 42, it is pulse-width modulation signal (, please the cooperate) input that above-mentioned driver element 20 is provided respectively with reference to figure 8 hereinafter to be referred as pwm signal; Aforementioned control unit 40 orders about in the work period of pwm signal (DUTYCYCLE) and makes described driver element 20 keep driving said motor 10 (comprising first motor winding 11 of 1 shown in the figure and one second motor winding 12) of winding and motor running.
Also be; the present invention not only can the described perception of simple and easy adjustment unit 30 the accurate position of preset reference and the flow through accurate position of driving (electric current or/with voltage) of aforementioned motor winding 10 of restriction; for example: at Fig. 6; one first resistance 31 of the described perception of conversion unit 30 among Fig. 7; the resistance of one second resistance 32 can obtain the dividing potential drop effect of different proportion; and then the effect of reaching setting or changing accurate of described preset reference; above-mentioned control unit 40 is had only when its distinguishing signal (output signal behind the accurate position of the more described preset reference in described perception unit 30 and the accurate position of the driving of the aforementioned motor winding 10 of flowing through) that receives aforementioned perception unit 30 show accurate of the non-preset reference in the accurate position of driving that one three resistance 33 of electric current (or claiming winding current) in described perception unit 30 of the aforementioned motor winding 10 of circulation forms less than described perception unit 30; just start current-limiting protection function (adjusting or limit the accurate position of driving that above-mentioned driver element 20 exports aforementioned motor winding 10 to); (please cooperate with reference to shown in Figure 4 has at least the PWM signal of a plurality of 25kHz to disappear because of current-limiting protection must be closed the PWM signal can to change prior art; cause the frequency of its PWM to be reduced to below the 20kHz); therefore; control unit 40 of the present invention can make described driver element 20 still keep basic work period (5%PWM signal pulsewidth for example; only not as limit); but the switch noise frequency of so keeping motor can not hanged down the people's ear induction range at 25kHz, so can significantly reduce noise.
The present invention does not see open and uses, and meets the patent of invention important document yet, files an application in accordance with the law, sincerely please grant quasi patent, is that institute is to expecting.
The above is only for the preferred embodiment of this case, aforesaid each step is not represented the enforcement order, and be not in order to restriction the present invention, if comply with the change that conception of the present invention is done, in not breaking away from the present invention's spirit scope,, modify and use for various variations, the equivalent action that produces all should be included in the interest field of this case.
Claims (4)
1. current limiting protection control structure that reduces motor switch noise, it is characterized in that: it includes: a motor winding;
One driver element is to be electrically connected the said motor winding, to drive the motor operation that aforementioned motor winding is constituted;
One perception unit is to be electrically connected described motor winding, detects accurate of the preset reference and the output distinguishing signal of the accurate position of driving and the more described according to this perception unit of the aforementioned motor winding of flowing through;
One control unit, be to be electrically connected above-mentioned driver element, aforementioned perception unit and a Hall subassembly, and described control unit is adjusted the accurate position of driving that above-mentioned driver element exports aforementioned motor winding to according to the distinguishing signal of described perception unit output, and described driver element output is still kept a basic work period.
2. the current limiting protection control structure of reduction motor switch noise according to claim 1 is characterized in that: described Hall subassembly and described control unit are to be integrated in an integrated circuit.
3. the current limiting protection control structure of reduction motor switch noise according to claim 1 is characterized in that: described driver element, Hall subassembly and described control unit are to be integrated in an integrated circuit.
4. the current limiting protection control structure of reduction motor switch noise according to claim 1 is characterized in that: described driver element, aforementioned perception unit, Hall subassembly and described control unit are to be integrated in an integrated circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100024754A CN101232265A (en) | 2007-01-24 | 2007-01-24 | Current limiting protection control structure for reducing motor switch noise |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100024754A CN101232265A (en) | 2007-01-24 | 2007-01-24 | Current limiting protection control structure for reducing motor switch noise |
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| CN101232265A true CN101232265A (en) | 2008-07-30 |
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| CNA2007100024754A Pending CN101232265A (en) | 2007-01-24 | 2007-01-24 | Current limiting protection control structure for reducing motor switch noise |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103807193A (en) * | 2012-11-06 | 2014-05-21 | 台达电子工业股份有限公司 | Signal producing circuit |
| CN105703671A (en) * | 2016-01-19 | 2016-06-22 | 亚翌斯风电机(上海)有限公司 | DC brushless fan motor driving circuit of double low-noise operational amplifier |
| CN108462152A (en) * | 2018-04-03 | 2018-08-28 | 上海灿瑞科技股份有限公司 | A kind of two-phase DC Brushless Motor output protection circuit |
| CN110247615A (en) * | 2018-03-09 | 2019-09-17 | 深圳市蓝海华腾技术股份有限公司 | Wave limiting control system, method and electric machine controller based on dsp chip |
-
2007
- 2007-01-24 CN CNA2007100024754A patent/CN101232265A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103807193A (en) * | 2012-11-06 | 2014-05-21 | 台达电子工业股份有限公司 | Signal producing circuit |
| CN103807193B (en) * | 2012-11-06 | 2016-08-17 | 台达电子工业股份有限公司 | Signal generating circuit |
| CN105703671A (en) * | 2016-01-19 | 2016-06-22 | 亚翌斯风电机(上海)有限公司 | DC brushless fan motor driving circuit of double low-noise operational amplifier |
| CN110247615A (en) * | 2018-03-09 | 2019-09-17 | 深圳市蓝海华腾技术股份有限公司 | Wave limiting control system, method and electric machine controller based on dsp chip |
| CN110247615B (en) * | 2018-03-09 | 2024-04-12 | 深圳市蓝海华腾技术股份有限公司 | Wave-by-wave current limiting control system and method based on DSP chip and motor controller |
| CN108462152A (en) * | 2018-04-03 | 2018-08-28 | 上海灿瑞科技股份有限公司 | A kind of two-phase DC Brushless Motor output protection circuit |
| CN108462152B (en) * | 2018-04-03 | 2023-11-03 | 上海灿瑞微电子有限公司 | Output protection circuit of double-phase direct-current brushless motor |
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Open date: 20080730 |