CN2874580Y - Temperature control speed changing circuit of DC brushless fan motor - Google Patents
Temperature control speed changing circuit of DC brushless fan motor Download PDFInfo
- Publication number
- CN2874580Y CN2874580Y CNU2006200032287U CN200620003228U CN2874580Y CN 2874580 Y CN2874580 Y CN 2874580Y CN U2006200032287 U CNU2006200032287 U CN U2006200032287U CN 200620003228 U CN200620003228 U CN 200620003228U CN 2874580 Y CN2874580 Y CN 2874580Y
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- reference voltage
- output unit
- resistance
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- 230000002708 enhancing effect Effects 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 8
- 230000003416 augmentation Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 7
- 230000000191 radiation effect Effects 0.000 description 4
- 230000000630 rising effect Effects 0.000 description 4
- 230000009183 running Effects 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 2
- 230000003292 diminished effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
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Abstract
The utility model relates to a thermal control and speed regulating circuit DC brushless motor, which comprises a reference voltage output unit and a drive voltage output unit. In detail, the reference voltage output unit is provided with a thermistance and a variable resistor connected with the thermistance in serial. The drive voltage output unit can accept the reference voltage signal to output a drive voltage signals to drive the rotating sector. It is feasible to flexibly adjust impedance of the variable resistor driven by the serial thermistance to modulate the relation between reference voltage signal and ambient temperature variation according to individual preference and actual radiating demand, thus greatly enhancing the whole circuit in the scope of sector rotational speed through thermal control.
Description
Technical field
The utility model relates to a kind of speed change circuit of brush DC fan motor, particularly relates to a kind of temperature control speed change circuit of brush DC fan motor.
Background technology
As shown in Figure 1, the temperature control speed change circuit 1 of an existing brush DC fan motor is to be connected with the driving circuit 5 that can control a fan 3 rotating speeds, and comprise one can be with variation of ambient temperature corresponding output one reference voltage signal V
1Thermistor R
Th, two be series at this thermistor R
ThAnd first resistance R between a power Vcc
11, an one end is electrically connected on this thermistor R
ThWith one first resistance R wherein
11Between second resistance R
12, one be electrically connected on this second resistance R
12The 3rd resistance R of the other end
13, its anode can accept this reference voltage signal V
1Amplifier OP, be electrically connected on the transistor Q of 5 of the output terminal, this power Vcc of this amplifier OP and this driving circuits, and two are electrically connected on the negative terminal of this amplifier OP and the 4th resistance R between this transistor Q
14The anode of this amplifier OP can receive this reference voltage signal V
1, its negative terminal place then is formed with a reference voltage V
2, mainly export this drive voltage signal V according to both voltage differences
3, 5 of this driving circuits are according to this drive voltage signal V
3Value is to control the Q conducting of this transistor or to block.
In these fan 3 operation process, this thermistor R
ThResistance can change along with variation of ambient temperature, and export corresponding reference voltage signal V
1Value.Suppose this thermistor R
ThBe positive temperature coefficient (PTC), when environment temperature raises, this thermistor R
ThThe output reference voltage signal V of institute
1Be worth corresponding rising; On the contrary, when environment temperature reduces, this thermistor R
ThThe output reference voltage signal V of institute
1Be worth then corresponding reduction.
And as reference voltage signal V
1Value is greater than reference voltage V
2During value, the outputting drive voltage signal V of this amplifier OP institute
3Can make this transistor Q be conducting, the power Vcc electric current is passed to this driving circuit 5, and looks this reference voltage signal V
1Value size is flowed through this transistor Q and the size of current that flows to this driving circuit 5 changes with decision from this power Vcc, and then is determined the increasing degree or the reduction amplitude of these fan 3 rotating speeds.That is to say, as reference voltage signal V
1Value raises, and when the magnitude of current that flows to this driving circuit 5 was increased, the rotating speed of this fan 3 just increased; As reference voltage signal V
1Value diminishes, and when the magnitude of current that flows to this driving circuit 5 was dwindled, the rotating speed of this fan 3 then reduced.
On the contrary, as reference voltage signal V
1Value is less than reference voltage V
2During value, the outputting drive voltage signal V of this amplifier OP institute
3Then make this transistor Q be and open circuit, this driving circuit 5 rotates because of outage can't continue to order about fan 3, and fan 3 rotating speeds just reduce and the stop that arrives gradually.
Therefore, by this thermistor R
ThCan be with variation of ambient temperature corresponding output reference voltage signal V
1, this amplifier OP more according to this after relatively corresponding outputting drive voltage signal V
3, to reach the purpose of adjustment, control fan 3 rotating speeds.
Yet, as shown in Figure 2, because this thermistor R
ThSusceptibility to variation of ambient temperature is fixed, the output reference voltage signal V of institute
1And the design of the corresponding relation between variation of ambient temperature is fixed, and the user can't give the elasticity adjustment with individual preference and actual radiating requirements, and is whole obviously limited on the range of control of temperature control adjustment rotating speed, the also relative limit with marketability of its suitable category.
The utility model content
Therefore, the purpose of this utility model is to provide a kind of range of speed control big, and can be according to using preference and actual radiating requirements to give the temperature control speed change circuit of the brush DC fan motor of elasticity adjustment.
So, the utility model provides a kind of temperature control speed change circuit of brush DC fan motor, this brush DC fan motor comprises an impeller, and one be electrically connected and control according to this driving circuit of this impeller rotating speed with this temperature control speed change circuit, this temperature control speed change circuit comprises a reference voltage output unit, and a driving voltage output unit that is electrically connected between this reference voltage output unit and this driving circuit.This reference voltage output unit has the thermistor that can export a reference voltage signal according to variation of ambient temperature, and a variable resistor of connecting with this thermistor.This driving voltage output unit can be accepted this reference voltage signal, can drive the drive voltage signal that this impeller rotates and export one according to this.
Effect of the present utility model is and can uses preference and actual radiating requirements with the individual, the elasticity adjustment is series at the variable-resistance resistance value of this thermistor, with the corresponding relation that is presented between this reference voltage signal of modulation and variation of ambient temperature, whole obviously increase on the range of control of temperature control adjustment rotation speed of the fan.
Description of drawings
Fig. 1 is a circuit structure diagram, and a temperature control speed change circuit design of an existing brushless DC fan is described;
Fig. 2 is a curve map, and the temperature control speed change rotating speed that circuit design presents and the temperature relation of this existing brushless DC fan is described;
Fig. 3 is a circuit design sketch, and one first preferred embodiment of the temperature control speed change circuit of brush DC fan motor of the present invention is described, the annexation of itself and one drive circuit;
Fig. 4 is a circuit diagram, and a reference voltage output unit of this first preferred embodiment is described, and a driving voltage output unit;
Fig. 5 is a curve map, illustrates that this first preferred embodiment presents multiple impeller rotating speed and temperature relation;
Fig. 6 is a partial circuit diagram, and the reference voltage output unit of one second preferred embodiment of the temperature control speed change circuit of brush DC fan motor of the present invention is described;
Fig. 7 is a partial circuit diagram, and the reference voltage output unit of one the 3rd preferred embodiment of the temperature control speed change circuit of brush DC fan motor of the present invention is described;
Fig. 8 is a partial circuit diagram, and the reference voltage output unit of one the 4th preferred embodiment of the temperature control speed change circuit of brush DC fan motor of the present invention is described;
Fig. 9 is a partial circuit diagram, and the reference voltage output unit of one the 5th preferred embodiment of the temperature control speed change circuit of brush DC fan motor of the present invention is described;
Figure 10 is a partial circuit diagram, and the reference voltage output unit of one the 6th preferred embodiment of the temperature control speed change circuit of brush DC fan motor of the present invention is described.
Embodiment
Be elaborated below by most preferred embodiment and accompanying drawing temperature control speed change circuit to the utility model brush DC fan motor.Before the utility model is described in detail, be noted that in the following description content similar elements is to represent with identical numbering.
As shown in Figure 3 and Figure 4, one first preferred embodiment of the temperature control speed change circuit 2 of the utility model brush DC fan motor, this brush DC fan motor comprises an impeller 4, and one can control the driving circuit 6 that this impeller 4 turns; This driving circuit 6 has a drive IC 61, and one is electrically connected on this drive IC 61 and can orders about the drive coil 62 that this impeller 4 rotates.Mechanism principle relevant for these driving circuit 6 related driving impellers 4 rotate because of belonging to the known technology of those of ordinary skill of fan industry technical field, is not described in detail in this for this reason.
This temperature control speed change circuit 2 is to be electrically connected with this driving circuit 6, and can make the rotating speed of this this impeller 4 of driving circuit 6 modulations.This temperature control speed change circuit 2 comprises a reference voltage output unit 21, and a driving voltage output unit 22 that is electrically connected between this reference voltage output unit 21 and this driving circuit 6.
This reference voltage output unit 21 has one can export a reference voltage signal V according to variation of ambient temperature
1Thermistor R
Th, one and this thermistor R
ThOutput terminal series connection and can be for elasticity adjustment resistance value with this reference voltage signal of relative adjustment V
1The variable resistor R of value size
Tc, its opposite end is electrically connected a power Vcc and this variable resistor R respectively
TcFirst resistance R of an end
21, and one can be in order to the capacitor C of filtering noise information.One end of this capacitor C is to be electrically connected on this first resistance R
21With this variable resistor R
TcBetween, its other end then is a ground connection.In the present embodiment, this thermistor R
ThBe positive temperature coefficient type (being meant that its resistance value increases with the environment temperature rising); Certainly, this thermistor R
ThAlso can be negative temperature coefficient type (being meant that its resistance value reduces with the environment temperature rising).
This driving voltage output unit 22 is to be arranged in this drive IC 61, and has its anode and be electrically connected on amplifier OP with the output terminal of this reference voltage output unit 21; One is electrically connected on the transistor Q between the input end of output terminal, this power Vcc and this driving circuit 6 of this amplifier OP; And one be electrically connected on the negative terminal of this amplifier OP and the second resistance group 23 between this transistor Q.That is to say that the base stage of this transistor Q is the output terminal that is electrically connected this amplifier OP, its collection utmost point is to be electrically connected this power Vcc, and its emitter-base bandgap grading then is to be electrically connected this driving circuit 6.And this second resistance group 23 has second resistance R of two series connection
22
Wherein, the anode of this amplifier OP can be accepted this thermistor R
ThThe output reference voltage signal V of institute
1, and its negative terminal forms a reference voltage V
2, this amplifier OP can export a drive voltage signal V according to both relatively back gained voltage differences
3, in order to whether to control this transistor Q conducting.Reference voltage signal V when the anode place of this amplifier OP
1Value is greater than the reference voltage V at its negative terminal place
2During value, this drive voltage signal V of corresponding output
3Can make this transistor Q be conducting, the electric current of this power Vcc just can be flowed through this transistor Q and be passed to this driving circuit 6, and 6 of this driving circuits drive this impeller 4 according to this and rotate; As for the magnitude of current size of this transistor Q that flows through, then be according to this reference voltage signal V
1Value size and deciding that is to say that the magnitude of current of this transistor Q that flows through and the rotating speed of this impeller 4 can be along with this reference voltage signal V
1Value increases and raises, and the magnitude of current of this transistor Q that flows through and the rotating speed of this impeller 4 can be along with this reference voltage signal V
1Value reduces and reduces.On the contrary, as reference voltage signal V
1Value is less than reference voltage V
2During value, the drive voltage signal V of corresponding output
3Then make this transistor Q be blocking-up, this driving circuit 6 rotates because of outage can't continue to order about this impeller 4, and the rotating speed of this impeller 4 just reduces and the transfixion that arrives gradually.
When this brush DC fan motor operates, this thermistor R
ThThe resistance of (present embodiment is the positive temperature coefficient type person) can change along with variation of ambient temperature, to export corresponding reference voltage signal V
1Value, when raising as environment temperature, this thermistor R
ThResistance increase the output reference voltage signal V of institute
1Value then raises; Simultaneously, cooperate this variable resistor R
TcImpedance effect, will be to this thermistor R
ThThe output reference voltage signal V of institute
1Value exerts an influence, and that is to say this thermistor R
ThInstitute's output reference voltage signal V under the equivalent environment temperature
1Value can be because of this variable resistor R
TcImpedance and different.Therefore, the user can desire to reach heat dissipating state demand (for example Consideration such as running noise, radiating rate) with institute according to individual preference, and elasticity adjustment voluntarily (as manually) this variable resistor R
TcResistance value, make this thermistor R
ThOutput is the reference voltage signal V of size suitably
1, allowing the magnitude of current of suitable size this transistor Q that flows through, can suitably operate under the rotating speed and control this impeller 4.
Cooperate as shown in Figure 5, fall the mechanism part with regard to increasing of these impeller 4 rotating speeds, at this moment, the reference voltage signal V when the anode place of this amplifier OP
1Value is the reference voltage V greater than its negative terminal place
2So value is this drive voltage signal V of corresponding output
3Can trigger this transistor Q and be conducting.See shown in the imaginary line curve among Fig. 5 that when the environment temperature rising maybe need promote the heat radiation effect, the user can directly adjust this variable resistor R
TcResistance value so that it becomes big, institute's output reference voltage signal V then
1Value also increases relatively, and most of magnitude of current that this power Vcc is exported can be because this variable resistor R
TcResistance value become big, then flow to be supplied to this driving circuit 6 toward this transistor Q direction, just can increase the rotating speed of this impeller 4 and promote the heat radiation effect.See shown in the dashed curve among Fig. 5, otherwise when environment temperature reduces, or desire is when reducing running noise, the user can directly adjust this variable resistor R
TcResistance value and it is diminished, the output reference voltage signal V of institute
1Value then also reduces relatively, and most of magnitude of current that this moment, this power Vcc was exported can be because this variable resistor R
TcResistance value diminish, then toward this variable resistor R
TcDirection flows, and is supplied to the magnitude of current of this driving circuit 6 just to diminish so flow through this transistor Q, just can reduce the rotating speed of this impeller 4, or the noise when reducing impeller 4 runnings.So can reach adjustment, control these impeller 4 rotating speeds and the purpose of the effect of dispelling the heat.
Therefore, the corresponding relation between the heat radiation effect can more meet, press close to individual preference and actual demand due to environmental aspect (as temperature, running noise etc.) and impeller 4 rotating speeds in order to allow, and user's elasticity adjustment voluntarily is series at this thermistor R
ThVariable resistor R
TcResistance value, with this thermistor of modulation R
ThThe output reference voltage signal V of institute
1, the corresponding relation between variation of ambient temperature and impeller 4 rotating speeds, this impeller 4 just can suitably operate under the rotating speed, so integral body obviously increases and suitable category augmentation on the range of control of temperature control adjustment rotation speed of the fan, obviously can improve temperature control speed change circuit 1 (see figure 1) of existing fan motor, its thermistor R
ThThe design of corresponding relation between institute's output reference voltage signal and variation of ambient temperature also can't the elasticity adjustment, causes on the whole range of control of adjusting rotating speed in temperature control obviously limited problem.
As shown in Figure 6, be one second preferred embodiment of the temperature control speed change circuit 2 of the utility model brush DC fan motor, different with this first preferred embodiment be in, this reference voltage output unit 21 also have one with this first resistance R
21The 3rd resistance R in parallel
23Be to know, can reach integral body equally and adjust effect such as obvious increase and suitable category augmentation on the range of control of rotation speed of the fan in temperature control.
As shown in Figure 7, be one the 3rd preferred embodiment of the temperature control speed change circuit 2 of the utility model brush DC fan motor, be in, three resistance R of this reference voltage output unit 21 different with this second preferred embodiment
23An end be to be electrically connected on this thermistor R
ThWith this variable resistor R
TcBetween, its other end then is a ground connection.Adjust effect such as obvious increase and suitable category augmentation on the range of control of rotation speed of the fan in temperature control and can reach integral body equally.
As shown in Figure 8, be one the 4th preferred embodiment of the temperature control speed change circuit 2 of the utility model brush DC fan motor, be in, three resistance R of this reference voltage output unit 21 different with this first preferred embodiment
23An end be to be electrically connected on this thermistor R
ThWith this variable resistor R
TcBetween, its other end then is to be electrically connected this variable resistor R
TcAnd between this capacitor C.Adjust effect such as obvious increase and suitable category augmentation on the range of control of rotation speed of the fan in temperature control and can reach integral body equally.
As shown in Figure 9, be one the 5th preferred embodiment of the temperature control speed change circuit 2 of the utility model brush DC fan motor, be in, three resistance R of this reference voltage output unit 21 different with this second preferred embodiment
23Opposite end be to be electrically connected this thermistor R respectively
ThWith this variable resistor R
TcAdjust effect such as obvious increase and suitable category augmentation on the range of control of rotation speed of the fan in temperature control and can reach integral body equally.
As shown in figure 10, be one the 6th preferred embodiment of the temperature control speed change circuit 2 of the utility model brush DC fan motor, different with the 5th preferred embodiment be in, this reference voltage output unit 21 also has one the 4th resistance R
24The 4th resistance R
24An end be to be electrically connected on the 3rd resistance R
23With this variable resistor R
TcBetween, its other end is ground connection then.Adjust effect such as obvious increase and suitable category augmentation on the range of control of rotation speed of the fan in temperature control and can reach integral body equally.
Conclude above-mentionedly, the temperature control speed change circuit 2 of the utility model brush DC fan motor mainly is that elasticity adjustment voluntarily is series at this thermistor R
ThVariable resistor R
TcResistance value, with this thermistor of modulation R
ThThe output reference voltage signal V of institute
1And the corresponding relation between variation of ambient temperature, be supplied to these driving circuit 6 suitable magnitudes of current and order about the suitable rotating speed of these impeller 4 tools, allow the corresponding relation between the heat radiation effect can meet individual preference and actual radiating requirements due to environmental aspect and impeller 4 rotating speeds, integral body obviously increases and suitable category augmentation on the range of control of temperature control adjustment rotation speed of the fan, so can reach the purpose of this utility model really.
Claims (8)
1, a kind of temperature control speed change circuit of brush DC fan motor, this brush DC fan motor comprises an impeller, an and driving circuit that is electrically connected with this impeller, this temperature control speed change circuit is to be electrically connected with this driving circuit, and comprise a reference voltage output unit that is electrically connected with a power supply, and a driving voltage output unit that is electrically connected between this driving circuit and this reference voltage output unit, it is characterized in that:
This reference voltage output unit has the thermistor that can export a reference voltage signal according to variation of ambient temperature, and a variable resistor of connecting with this thermistor, this driving voltage output unit can be accepted this reference voltage signal and export one according to this and can drive the drive voltage signal that this impeller rotates.
2, the temperature control speed change circuit of brush DC fan motor as claimed in claim 1 is characterized in that:
This reference voltage output unit also has its opposite end and is electrically connected this power supply and this variable-resistance first resistance respectively, and an electric capacity, and an end of this electric capacity is to be electrically connected between this first resistance and this variable resistor, and the other end of this electric capacity is ground connection then.
3, the temperature control speed change circuit of brush DC fan motor as claimed in claim 2 is characterized in that:
This reference voltage output unit also has three resistance in parallel with this first resistance.
4, the temperature control speed change circuit of brush DC fan motor as claimed in claim 2 is characterized in that:
This reference voltage output unit also has one the 3rd resistance, and an end of the 3rd resistance is electrically connected between this thermistor and this variable resistor, and its other end is a ground connection.
5, the temperature control speed change circuit of brush DC fan motor as claimed in claim 2 is characterized in that:
This reference voltage output unit also has its opposite end and is electrically connected this thermistor and this variable-resistance the 3rd resistance respectively.
6, the temperature control speed change circuit of brush DC fan motor as claimed in claim 5 is characterized in that:
This reference voltage output unit also has one the 4th resistance, and an end of the 4th resistance is to be electrically connected between the 3rd resistance and this variable resistor, and its other end is ground connection then.
7, the temperature control speed change circuit of brush DC fan motor as claimed in claim 2 is characterized in that:
This reference voltage output unit also has one the 3rd resistance, and the 3rd resistance one end is to be electrically connected between this thermistor and this variable resistor, and its other end is to be electrically connected between this variable resistor and this electric capacity.
8, as the temperature control speed change circuit of each described brush DC fan motor of claim 1 to 7, it is characterized in that:
This driving voltage output unit has its anode and is electrically connected on amplifier with the output terminal of this reference voltage output unit; One is electrically connected on the transistor between output terminal, this power supply and this driving circuit of this amplifier; And one be electrically connected on the negative terminal of this amplifier and the second resistance group between this transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200032287U CN2874580Y (en) | 2006-03-01 | 2006-03-01 | Temperature control speed changing circuit of DC brushless fan motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200032287U CN2874580Y (en) | 2006-03-01 | 2006-03-01 | Temperature control speed changing circuit of DC brushless fan motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2874580Y true CN2874580Y (en) | 2007-02-28 |
Family
ID=37781176
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2006200032287U Expired - Fee Related CN2874580Y (en) | 2006-03-01 | 2006-03-01 | Temperature control speed changing circuit of DC brushless fan motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2874580Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101174808B (en) * | 2007-10-22 | 2011-12-21 | 台达电子零组件(东莞)有限公司 | Control circuit and driving device including the same |
| CN102913470A (en) * | 2011-08-03 | 2013-02-06 | 建准电机工业股份有限公司 | Fan rotating speed control circuit |
| CN104579038A (en) * | 2014-12-19 | 2015-04-29 | 广东威灵电机制造有限公司 | Refrigeration equipment and speed adjustment system of direct-current brushless fan for refrigeration equipment |
| CN115575283A (en) * | 2022-09-30 | 2023-01-06 | 南京凤嘉科技有限公司 | Control circuit of SF6 gas density meter |
| US11629701B2 (en) | 2017-05-18 | 2023-04-18 | General Electric Company | System and method for estimating motor temperature of a pitch system of a wind turbine |
-
2006
- 2006-03-01 CN CNU2006200032287U patent/CN2874580Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101174808B (en) * | 2007-10-22 | 2011-12-21 | 台达电子零组件(东莞)有限公司 | Control circuit and driving device including the same |
| CN102913470A (en) * | 2011-08-03 | 2013-02-06 | 建准电机工业股份有限公司 | Fan rotating speed control circuit |
| CN102913470B (en) * | 2011-08-03 | 2015-09-02 | 建准电机工业股份有限公司 | Fan rotating speed control circuit |
| CN104579038A (en) * | 2014-12-19 | 2015-04-29 | 广东威灵电机制造有限公司 | Refrigeration equipment and speed adjustment system of direct-current brushless fan for refrigeration equipment |
| US11629701B2 (en) | 2017-05-18 | 2023-04-18 | General Electric Company | System and method for estimating motor temperature of a pitch system of a wind turbine |
| CN115575283A (en) * | 2022-09-30 | 2023-01-06 | 南京凤嘉科技有限公司 | Control circuit of SF6 gas density meter |
| CN115575283B (en) * | 2022-09-30 | 2024-03-26 | 南京凤嘉科技有限公司 | Control circuit of SF6 gas density meter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070228 |