CN203335445U - Brushless non-inductive fan - Google Patents
Brushless non-inductive fan Download PDFInfo
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- CN203335445U CN203335445U CN2013202460852U CN201320246085U CN203335445U CN 203335445 U CN203335445 U CN 203335445U CN 2013202460852 U CN2013202460852 U CN 2013202460852U CN 201320246085 U CN201320246085 U CN 201320246085U CN 203335445 U CN203335445 U CN 203335445U
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Abstract
The utility model discloses a brushless non-inductive fan. The brushless non-inductive fan comprises a fan frame, a motor, fan blades and a circuit board, wherein the motor and the fan blades are arranged inside the fan frame, and the circuit board is used for driving the motor to rotate. The motor comprises at least three coils which are electrically connected with the circuit board, the circuit board comprises a main control unit, a power supply protective unit, a PWM control unit, a first trigger control unit, a second trigger control unit and a third trigger control unit, the PWM control unit is used for speed regulation of the fan, and the first trigger control unit, the second trigger control unit and the third trigger control unit are electrically connected with the main control unit. The first trigger control unit, the second trigger control unit and the third trigger control unit are connected with the coil A, the coil B and the coil C in the motor respectively, then are connected in parallel, and are electrically connected with the main control unit. As the brushless non-inductive fan can achieve reversing control without a Hall element, the problem that the Hall element has a dead point easily during reversing is resolved, improvement of smoothness of reversing of the fan is facilitated, and the phenomenon of a dead halt is avoided.
Description
Technical field:
The utility model relates to the radiation fan product technical field, refers in particular to a kind ofly without Hall element, just can realize commutation, and the brushless noninductive fan satisfactory for result that commutates.
Background technique:
In general electronic product (as computer), because its inner electrical assembly the time can produce a lot of heat in running, if continue under the condition of high temperature always, easily cause the electrical assembly loss and reduce its working life.All by driven the heat operation by radiation fan at present, to reach the purpose of electronic product quick heat radiating, to improve working life and the working efficiency of electronic product.
Current radiation fan can both clockwise and anticlockwise, not only can reach thermal source is carried out to heat to disperse, can also be to the electrical assembly dedusting.
Radiation fan is all the noninductive brush fan that has at present, in its control circuit, is all to adopt Hall element to realize the commutation of motor, and Hall element is by the position of inductiopn rotor, and output signal is a square wave control signal, has low and high level Voltage-output alternately.Under the excitation of high level voltage signal, this Drive and Control Circuit exportable one flows through the electric current of a kind of direction of electronic coil, under the excitation of low level voltage signal, another group coil is under the excitation of high level voltage signal, and this Drive and Control Circuit can be controlled the conducting of other one group of electronic coil.Therefore, under the control of the voltage control signal of Hall element, this Drive and Control Circuit can realize the commutation of motor.
Above-mentioned Hall element, in the process of controlling commutation, the problem at dead point easily occurs, affects the smoothness of radiation fan commutation, the phenomenon crashed occurs.
Although use Hall element can realize the commutation of motor, Hall element also causes restriction to the development of motor in some aspects.For the accurate position of inductiopn rotor, Hall element need to be installed and be positioned on circuit board, but in order to comply with the day by day compact trend of electronic product, motor has to make more and more littlely, finds suitable mounting point and locate this Hall element also to become more and more difficult in narrow and small motor inner space.
In addition, Hall element has certain working stability scope, generally can not surpass 85 degrees centigrade, therefore, adopts the motor of this Hall element to use in many high temperature occasions.
The model utility content:
The purpose of this utility model is to overcome the deficiencies in the prior art, provides a kind of and just can realize commutation and the brushless noninductive fan satisfactory for result that commutates without Hall element.
In order to solve the problems of the technologies described above, the utility model has adopted following technical proposals: this is brushless, and noninductive fan comprises: the fan frame, the circuit board that is installed on the motor of fan in frame and flabellum and rotates for drive motor, it is characterized in that: described motor includes at least three coils that are electrically connected with circuit board, this circuit board includes: main control unit, the power protection unit, for the PWM control unit that fan is carried out to speed governing and the first trigger control unit be electrically connected with main control unit, the second trigger control unit, the 3rd trigger control unit, wherein, the first trigger control unit, the second trigger control unit and the 3rd trigger control unit respectively with motor in loop A, coil B, it is in parallel after coil C connects, and be electrically connected with main control unit.
Furthermore, in technique scheme, described main control unit comprises a control IC, and this control IC includes 32 pins.
Furthermore, in technique scheme, described the first trigger control unit includes: the metal-oxide-semiconductor Q1 of two connections and metal-oxide-semiconductor Q2 and a triode Q9, wherein, the source electrode of metal-oxide-semiconductor Q1 connects power supply VCC, the base stage of triode Q9 is electrically connected as the 31st pin of controlling IC in the anodal port of A and main control unit, and the grid of metal-oxide-semiconductor Q2 is electrically connected as A negative pole port and the 15th pin of controlling IC.
Furthermore, in technique scheme, the grid of described metal-oxide-semiconductor Q1 is connected with the collector electrode of described triode Q9, and the drain electrode of metal-oxide-semiconductor Q1 is connected with the drain electrode of metal-oxide-semiconductor Q2, is parallel with a resistance R 14 and capacitor C 9 between the source electrode of metal-oxide-semiconductor Q1 and grid.
Furthermore, in technique scheme, described loop A one end is connected between the drain electrode of the drain electrode of described metal-oxide-semiconductor Q1 and metal-oxide-semiconductor Q2, and the other end is electrically connected with the 10th pin of controlling IC; One series circuit one end consisted of resistance R 20 and resistance R 17 is connected between the drain electrode of the drain electrode of metal-oxide-semiconductor Q1 and metal-oxide-semiconductor Q2, the other end ground connection.
Furthermore, in technique scheme, the 24th pin of described control IC is connected between resistance R 20 and resistance R 17, and as the a-signal sense terminal.
Furthermore, in technique scheme, described metal-oxide-semiconductor Q1 is the P channel MOS tube, and metal-oxide-semiconductor Q2 is the N-channel MOS pipe, and triode Q9 is the NPN triode.
Furthermore, in technique scheme, the structure of described the second trigger control unit is consistent with the structure of the first trigger control unit, and it has the anodal port of B, B negative pole port, B signal detection end.
Furthermore, in technique scheme, the structure of described the 3rd trigger control unit is consistent with the structure of the first trigger control unit, and it has the anodal port of C, C negative pole port, C signal detection end.
Furthermore, in technique scheme, the working principle of described circuit board: after fan running, suppose loop A, B work, the approach that electric current flows through is: the anodal port of VCC, metal-oxide-semiconductor Q1, loop A, coil B, metal-oxide-semiconductor Q4, power supply ground, at this moment can produce the induced electromotive force of different direction because of coil cutting N and the S utmost point, so the voltage of coil C has one by just to negative change procedure during loop A, B energising, after C signal detection end detects this signal, control IC and can determine the commutation action according to the angle turned over; Loop A, C conducting after commutation, electric current is by VCC port, metal-oxide-semiconductor Q1, loop A, coil C, metal-oxide-semiconductor Q6, power supply ground; Conducting coil B, C successively subsequently, coil B, A, coil C, A, coil C, B, open metal-oxide-semiconductor Q3, Q6, metal-oxide-semiconductor Q3, Q2, metal-oxide-semiconductor Q5, Q2, metal-oxide-semiconductor Q5, Q4, realize controlling the fan Rotation With Changing to, and coordinate the PWM control unit to realize controlling rotation speed of the fan.
After adopting technique scheme, the utility model has following beneficial effect compared with prior art:
1, the utility model is brushless noninductive fan, and it does not need to install Hall element can realize controlling the fan commutation, has avoided the Hall element commutation problem at dead point easily to occur, is conducive to like this improve the smoothness of fan commutation, avoids occurring the phenomenon crashed.
2, can not realize controlling the fan commutation owing to not needing in the utility model that Hall element is installed, can comply with the day by day compact trend of electronic product, there is the larger market competitiveness.
The accompanying drawing explanation:
Fig. 1 is control circuit figure of the present utility model;
Embodiment:
Below in conjunction with specific embodiments and the drawings, the utility model is further illustrated.
Shown in Figure 1, a kind of brushless noninductive fan, comprise: the fan frame, the circuit board that is installed on the motor of fan in frame and flabellum and rotates for drive motor, described motor includes at least three coils that are electrically connected with circuit board, this circuit board includes: main control unit 1, power protection unit 2, for the PWM control unit 3 that fan is carried out to speed governing and the first trigger control unit 11 be electrically connected with main control unit 1, the second trigger control unit 12, the 3rd trigger control unit 13, wherein, the first trigger control unit 11, the second trigger control unit 12 and the 3rd trigger control unit 13 respectively with motor in loop A, coil B, it is in parallel after coil C connects, and be electrically connected with main control unit 1.
Described main control unit 1 comprises a control IC, this control IC includes 32 pins, this controls the direct ground connection of the 3rd, 5,21 pin of IC, and this controls the 7th, 8,11,12,13,14,17,23,27,28,30 unsettled of IC, and the 20th pin is in parallel and connect the rear ground connection of a capacitor C 6.P1 to P32 in Fig. 1 means respectively to control the 1st pin to the 32 pins of IC.
Described the first trigger control unit 11 includes: the metal-oxide-semiconductor Q1 of two connections and metal-oxide-semiconductor Q2 and a triode Q9, wherein, the source electrode of metal-oxide-semiconductor Q1 connects power supply VCC, the base stage of triode Q9 is electrically connected as the 31st pin of controlling IC in the anodal port 111 of A and main control unit 1, and the grid of metal-oxide-semiconductor Q2 is as A negative pole port 112 and the 15th pin electric connection of controlling IC.
The grid of described metal-oxide-semiconductor Q1 is connected with the collector electrode of described triode Q9, and the drain electrode of metal-oxide-semiconductor Q1 is connected with the drain electrode of metal-oxide-semiconductor Q2, is parallel with a resistance R 14 and capacitor C 9 between the source electrode of metal-oxide-semiconductor Q1 and grid.
Described loop A one end is connected between the drain electrode of the drain electrode of described metal-oxide-semiconductor Q1 and metal-oxide-semiconductor Q2, and the other end is electrically connected with the 10th pin of controlling IC; One series circuit one end consisted of resistance R 20 and resistance R 17 is connected between the drain electrode of the drain electrode of metal-oxide-semiconductor Q1 and metal-oxide-semiconductor Q2, the other end ground connection.The 24th pin of described control IC is connected between resistance R 20 and resistance R 17, and as a-signal sense terminal 113.
Described metal-oxide-semiconductor Q1 is the P channel MOS tube, and metal-oxide-semiconductor Q2 is the N-channel MOS pipe, and triode Q9 is the NPN triode.
The structure of described the second trigger control unit 12 is consistent with the structure of the first trigger control unit 11, it has the anodal port 121 of B, B negative pole port 122, B signal detection end 123, the 25th pin that this B signal detection end 123 is described control IC, the anodal port 121 of this B is connected with the 1st pin with the 32nd pin of controlling IC respectively with B negative pole port 122.
Described the second trigger control unit 12 includes P channel MOS tube Q3, N-channel MOS pipe Q4 and NPN triode Q8.
The structure of described the 3rd trigger control unit 13 is consistent with the structure of the first trigger control unit 11, and it has the anodal port 131 of C, C negative pole port 132, C signal detection end 133.The 26th pin that this C signal detection end 133 is described control IC, the anodal port 131 of this C is connected with the 9th pin with the 2nd pin of controlling IC respectively with C negative pole port 132.
Described the 3rd trigger control unit 13 includes P channel MOS tube Q5, N-channel MOS pipe Q6 and NPN triode Q7.
Described power protection unit 2 comprises the circuit of three-terminal voltage-stabilizing integrated chip that a model is 7805, and the one end connects linkage unit VCC after a diode, an end ground connection, and an end is connected with the 29th pin of control IC after connecting a resistance R 3; The end that resistance R 3 is connected with the circuit of three-terminal voltage-stabilizing integrated chip also is connected with the 4th, 6,18 pins of controlling IC, and connects ground connection after the parallel circuit of a capacitor C 3 and C1 formation.
Described PWM control unit 3 comprises a triode Q10, it is rear as the PWM port that the base stage of this triode Q10 connects a resistance R 25, the collector electrode of this triode Q10 is connected with a 5V power supply after connecting a resistance R 2, wherein, the 16th pin of controlling IC is connected between the collector electrode and resistance R 2 of triode Q10, the grounded-emitter connection of this triode Q10.
The anodal port 111 of described A, the anodal port 121 of B, the anodal port 131 of C are for controlling PWM output terminal in IC.
Described A negative pole port 112, B negative pole port 122, C negative pole port 132 are, when in the corresponding IC of control, the PWM output terminal is exported, to control the low and high level output terminal in IC.
The working principle of described circuit board: after fan running, suppose loop A, B work, the approach that electric current flows through is: the anodal port of VCC, metal-oxide-semiconductor Q1, loop A, coil B, metal-oxide-semiconductor Q4, power supply ground, at this moment can produce the induced electromotive force of different direction because of coil cutting N and the S utmost point, so the voltage of coil C has one by just to negative change procedure during loop A, B energising, after C signal detection end 133 detects this signal, control IC and can determine the commutation action according to the angle turned over; Loop A, C conducting after commutation, electric current is by the anodal port of VCC, metal-oxide-semiconductor Q1, loop A, coil C, metal-oxide-semiconductor Q6, power supply ground; Conducting coil B, C successively subsequently, coil B, A, coil C, A, coil C, B, open metal-oxide-semiconductor Q3, Q6, metal-oxide-semiconductor Q3, Q2, metal-oxide-semiconductor Q5, Q2, metal-oxide-semiconductor Q5, Q4, realize controlling the fan Rotation With Changing to, and coordinate PWM control unit 3 to realize controlling rotation speeds of the fan.
Certainly, the foregoing is only specific embodiment of the utility model, be not to limit the utility model practical range, all equivalences of doing according to the described structure of the utility model claim, feature and principle change or modify, and all should be included in the utility model claim.
Claims (10)
1. a brushless noninductive fan, comprise: the fan frame, the circuit board that is installed on the motor of fan in frame and flabellum and rotates for drive motor, it is characterized in that: described motor includes at least three coils that are electrically connected with circuit board, this circuit board includes: main control unit (1), power protection unit (2), for the PWM control unit (3) that fan is carried out to speed governing and the first trigger control unit (11) be electrically connected with main control unit (1), the second trigger control unit (12), the 3rd trigger control unit (13), wherein, the first trigger control unit (11), the second trigger control unit (12) and the 3rd trigger control unit (13) respectively with motor in loop A, coil B, it is in parallel after coil C connects, and be electrically connected with main control unit (1).
2. a kind of brushless noninductive fan according to claim 1, it is characterized in that: described main control unit (1) comprises a control IC, this control IC includes 32 pins.
3. a kind of brushless noninductive fan according to claim 2, it is characterized in that: described the first trigger control unit (11) includes: the metal-oxide-semiconductor Q1 of two connections and metal-oxide-semiconductor Q2 and a triode Q9, wherein, the source electrode of metal-oxide-semiconductor Q1 connects power supply VCC, the base stage of triode Q9 is electrically connected as the anodal port of A (111) and the 31st pin of the middle IC of control of main control unit (1), and the grid of metal-oxide-semiconductor Q2 is as A negative pole port (112) and the 15th pin electric connection of controlling IC.
4. a kind of brushless noninductive fan according to claim 3, it is characterized in that: the grid of described metal-oxide-semiconductor Q1 is connected with the collector electrode of described triode Q9, the drain electrode of metal-oxide-semiconductor Q1 is connected with the drain electrode of metal-oxide-semiconductor Q2, is parallel with a resistance R 14 and capacitor C 9 between the source electrode of metal-oxide-semiconductor Q1 and grid.
5. a kind of brushless noninductive fan according to claim 4 is characterized in that: described loop A one end is connected between the drain electrode of the drain electrode of described metal-oxide-semiconductor Q1 and metal-oxide-semiconductor Q2, and the other end is electrically connected with the 10th pin of controlling IC; One series circuit one end consisted of resistance R 20 and resistance R 17 is connected between the drain electrode of the drain electrode of metal-oxide-semiconductor Q1 and metal-oxide-semiconductor Q2, the other end ground connection.
6. a kind of brushless noninductive fan according to claim 5 is characterized in that: the 24th pin of described control IC is connected between resistance R 20 and resistance R 17, and as a-signal sense terminal (113).
7. a kind of brushless noninductive fan according to claim 2, it is characterized in that: described metal-oxide-semiconductor Q1 is the P channel MOS tube, and metal-oxide-semiconductor Q2 is the N-channel MOS pipe, and triode Q9 is the NPN triode.
8. a kind of brushless noninductive fan according to claim 7, it is characterized in that: the structure of described the second trigger control unit (12) is consistent with the structure of the first trigger control unit (11), and it has the anodal port (121) of B, B negative pole port (122), B signal detection end (123).
9. a kind of brushless noninductive fan according to claim 8, it is characterized in that: the structure of described the 3rd trigger control unit (13) is consistent with the structure of the first trigger control unit (11), and it has the anodal port (131) of C, C negative pole port (132), C signal detection end (133).
10. a kind of brushless noninductive fan according to claim 1, it is characterized in that: the working principle of described circuit board: after fan running, suppose loop A, B work, the approach that electric current flows through is: the anodal port of VCC, metal-oxide-semiconductor Q1, loop A, coil B, metal-oxide-semiconductor Q4, power supply ground, at this moment can produce the induced electromotive force of different direction because of coil cutting N and the S utmost point, so in loop A, during B energising, the voltage of coil C has one by just to negative change procedure, after C signal detection end (133) detects this signal, control IC and can determine the commutation action according to the angle turned over, loop A, C conducting after commutation, electric current is by the anodal port of VCC, metal-oxide-semiconductor Q1, loop A, coil C, metal-oxide-semiconductor Q6, power supply ground, conducting coil B, C successively subsequently, coil B, A, coil C, A, coil C, B, open metal-oxide-semiconductor Q3, Q6, metal-oxide-semiconductor Q3, Q2, metal-oxide-semiconductor Q5, Q2, metal-oxide-semiconductor Q5, Q4, realize to control the fan Rotation With Changing to, and coordinate PWM control unit (3) to realize controlling rotation speed of the fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202460852U CN203335445U (en) | 2013-05-08 | 2013-05-08 | Brushless non-inductive fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202460852U CN203335445U (en) | 2013-05-08 | 2013-05-08 | Brushless non-inductive fan |
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| CN203335445U true CN203335445U (en) | 2013-12-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013202460852U Expired - Fee Related CN203335445U (en) | 2013-05-08 | 2013-05-08 | Brushless non-inductive fan |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112187986A (en) * | 2020-09-29 | 2021-01-05 | 努比亚技术有限公司 | Heat dissipation control circuit, heat dissipation back splint and mobile terminal |
| CN113075980A (en) * | 2021-03-26 | 2021-07-06 | 山东英信计算机技术有限公司 | Heat dissipation and power supply module and power supply frame |
-
2013
- 2013-05-08 CN CN2013202460852U patent/CN203335445U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112187986A (en) * | 2020-09-29 | 2021-01-05 | 努比亚技术有限公司 | Heat dissipation control circuit, heat dissipation back splint and mobile terminal |
| CN113075980A (en) * | 2021-03-26 | 2021-07-06 | 山东英信计算机技术有限公司 | Heat dissipation and power supply module and power supply frame |
| CN113075980B (en) * | 2021-03-26 | 2023-03-10 | 山东英信计算机技术有限公司 | Heat dissipation and power supply module and power supply frame |
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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: 20131211 Termination date: 20140508 |