CN2368220Y - Brushless fan control circuit device with over-voltage protection - Google Patents
Brushless fan control circuit device with over-voltage protection Download PDFInfo
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- CN2368220Y CN2368220Y CN99205258U CN99205258U CN2368220Y CN 2368220 Y CN2368220 Y CN 2368220Y CN 99205258 U CN99205258 U CN 99205258U CN 99205258 U CN99205258 U CN 99205258U CN 2368220 Y CN2368220 Y CN 2368220Y
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Abstract
The utility model relates to a brushless fan control circuit device with over-voltage protection. In the utility model, the output end of two driving units arranged in a control circuit is respectively connected with a switch element, and namely, the inner of the integrated control circuit is provided with two switch elements which are respectively connected with the output ends of the driving units which drive fan coil; when the fan coil generates reverse electromotive force and over-voltage because of polarity transformation, the switch elements which are correspondingly connected are switched on, the instantaneous over-voltage are devolved and guided to the other fan coil which acts so as to prevent the driving units from being damaged and further greatly increase the running efficiency of a fan.
Description
The utility model relates to a kind of control circuit device of control or adjusting of electricity field motor; particularly relate to a kind of in order to brush-less fan coil reverse or power supply moment break-make the time back electromotive force overvoltage that generates be transferred to another coil on, and with overvoltage protection and improve the brush-less fan control circuit device with overvoltage protection of double effects such as running usefulness.
Seeing also shown in Figure 8ly, is a kind of control circuit device of existing traditional brush-less fan, and it includes the pulse generator 3 that a hall sensor 1, an amplifying circuit that is connected with hall sensor 12, are connected in amplifying circuit 2 outputs; The output of this pulse generator 3 is respectively equipped with two groups of anti-phase each other driver elements 4 again, 5, these two groups of driver elements 4,5 respectively by making the two group transistor Q11 that the Darlington connects, Q12 and transistor Q13, Q14 forms, this two groups of driver elements 4 again, 5 transistor Q11 at its input side, the collector electrode of Q13, be provided with a zener diode Z1 between the base stage, Z2, moreover, two driver elements 4,5 output contact 6,7, then supply respectively two groups of coil L1 with fan FAN, L2 connects, this two coil L1, the in addition end of L2 then in control circuit set diode connect power supply VCC.
The control circuit device of aforesaid brush-less fan, be to generate a set of pulses by its pulse generator 3 to make a driver element 4 conductings, and make electric current pass through the coil L1 of these driver element 4 correspondences with rotary rotor, at the same time, 5 anti-phase each other of another driver elements end, when aforementioned rotor rotation, will generate changes of magnetic field, satisfy by hall sensor 1 and found out and the output potential signal, after amplifying circuit 2 amplifies, deliver to pulse generator 3 and change the output impulse phase, and change by organizing driver element 5 conductings separately, and make electric current another coil L2 that flows through, make rotor rotate an angle again, so driven makes the fan propeller continuous running.
Because coil L1, L2 will generate the back electromotive force overvoltage when the electric current instantaneous interruption, and the back electromotive force overvoltage that aforesaid control circuit generates when the reverse for fear of coil L1, L2 causes the damage of driver element 4,5, as before promptly, between the collector electrode of input side transistor Q11, the Q13 of driver element 4,5, base stage, establish, eliminate this overvoltage so as to bypass with zener diode Z1, Z2.
Though the aforementioned practice can effectively avoid overvoltage to undermine driver element 4,5, but only be the anti-system measure of a passiveness, and can't produce further positive function.Though the overvoltage that fan loop is generated constitutes a threat to driver element 4,5, if can properly be utilized not only unlikely damage driver element 4,5, the running efficiency that also can significantly promote fan when reverse; But aforesaid control circuit device is seen these positive functions are not arranged.
Existing again brush-less fan control circuit device is all integrated, its inner main element is all finished in manufacture of semiconductor, and still can't in circuit, generate zener diode effectively with the manufacture of semiconductor technology of current standard, in other words, zener diode in the aforesaid control circuit device also can't be finished in processing procedure simultaneously, and must be additional in addition, so the practice certainly will raise the cost, and increases the difficulty of operation and influences production efficiency.This shows that above-mentioned existing brush-less fan control circuit device still has many defectives, and the assistant officer waits to be improved.
Because the defective that above-mentioned existing brush-less fan control circuit device exists, the design people is actively studied innovation, through constantly studying, designing based on abundant practical experience and professional knowledge, and after studying sample and improvement repeatedly, create the utility model finally.
Main purpose of the present utility model is; overcome the defective that existing brush-less fan control circuit device exists; and provide a kind of brush-less fan control circuit device with overvoltage protection; make its can be with brush-less fan coil reverse or power supply moment break-make the time back electromotive force overvoltage that generates be transferred to another coil on, and with overvoltage protection and improve double effects such as running usefulness.
The purpose of this utility model is realized by following technical scheme.According to a kind of brush-less fan control circuit device that the utility model proposes with overvoltage protection; it is characterized in that its circuit is to be connected with a switch element respectively at the inner two driver element outputs of control circuit; when fan loop generates the back electromotive force overvoltage because of reverse; to make the corresponding switch element conducting that connects, give another active fan loop so as to transient overvoltage is shifted through switch element.
The purpose of this utility model can also further realize by following technical measures.
Aforesaid brush-less fan control circuit device with overvoltage protection; the front end of wherein said two driver elements is provided with a pulse-generating circuit; this pulse-generating circuit is connected with an amplifying circuit, and this input amplifier then is connected with hall sensor (Hall sensor).
Aforesaid brush-less fan control circuit device with overvoltage protection, the front end of wherein said two driver elements is provided with a pulse-generating circuit, and this pulse-generating circuit is connected with a buffer, and this buffer input is for being connected with Hall IC (Hall IC).
Aforesaid brush-less fan control circuit device with overvoltage protection, wherein said switch element is to be made of a diode, it is held in addition and is connected with fan loop through power supply node.
Aforesaid brush-less fan control circuit device with overvoltage protection, wherein said switch element are that the transistor by the collector electrode current limliting constitutes, and this transistor base then is connected with fan loop through power supply node.
Aforesaid brush-less fan control circuit device with overvoltage protection; wherein said switch element is to be made of a P channel fet (PMOS); its grid is connected with fan loop through power supply node, and its drain electrode is connected to the driver element output, and collector electrode then gives ground connection.
Aforesaid brush-less fan control circuit device with overvoltage protection, wherein said switch element is to be made of electronic switch, it is held in addition and is connected with fan loop through power supply node.
The utility model compared with prior art has tangible advantage and good effect.By above technical scheme as can be known; the utility model is because of connecting the switch element of switch current passage respectively at the driver element output of brush-less fan control circuit device; therefore when the coil reverse; the back electromotive force overvoltage that moment can be generated shifts gives active coil; and can reach the overvoltage protection purpose, and can significantly improve the running usefulness of fan.
Another advantage of the present utility model is; when the aforementioned switch element of reaching the overvoltage protection purpose of relying is made of diode or transistor; generate in its as easy as rolling off a log processing procedure by semiconductor circuit; in other words; the brush-less fan control circuit device need not be added other elements in addition; only need in processing procedure, to form transistor simultaneously, and constitute specific wiring relation, can reach the effect of overvoltage protection easily.
In sum, the utility model mainly is to be provided with two switch elements in integrated control circuit, two switch elements are connected with the driver element output of drive fan coil respectively, when fan loop generates the back electromotive force overvoltage because of reverse, corresponding switch element conducting will be made, and overvoltage is guided to another active fan loop through switch element, whereby except that can preventing that driver element is impaired, and can further significantly improve the running usefulness of fan.Therefore the back electromotive force overvoltage that generates was transferred to another coil on when it can be with brush-less fan coil reverse or power supply moment break-make, and with overvoltage protection and improve double effects such as the usefulness that turns round.No matter it structurally or bigger improvement is all arranged on the function, and produced handy and practical effect, and have the effect of enhancement really, thereby be suitable for practicality more, really is a new and innovative, progressive, practical new design.
Concrete structure of the present utility model is provided in detail by following examples and accompanying drawing thereof.
The circuit diagram of the preferred embodiment when Fig. 1 is the utility model use hall sensor.
Fig. 2 is circuit and the sense of current schematic diagram of the utility model preferred embodiment when utilizing diode as switch element.
Fig. 3 is circuit and the sense of current schematic diagram of the utility model preferred embodiment when utilizing electronic switch as switch element.
Fig. 4 is circuit and the sense of current schematic diagram of the utility model preferred embodiment when utilizing transistor as switch element.
Fig. 5 is that the utility model generates the transistorized structural representation of PNP in the CMOS manufacturing process.
Circuit diagram when Fig. 6 is the another preferred embodiment use of the utility model Hall IC.
Fig. 7 is a working waveform figure of the present utility model.
Fig. 8 is the circuit diagram of existing traditional brush-less fan control circuit device.
Below in conjunction with accompanying drawing and preferred embodiment, to according to its concrete structure of brush-less fan control circuit device, feature and the effect thereof that the utility model proposes with overvoltage protection, describe in detail as after.
At first see also shown in Figure 1; the utlity model has the brush-less fan control circuit device of overvoltage protection; it mainly is that output OUT1, OUT2 with two groups of anti-phase each other driver elements 11,12 is connected with two groups of coil L1, L2 of fan group FAN respectively, and the end in addition of two coil L1, L2 is connected with power supply VCC through a diode respectively.
The output of two driver elements 11,12 is connected with a switch element K1, K2 respectively again, on another coil L2, L1 in the overvoltage effect of being transferred to (TURN ON) of coil L1, L2 being closed the generation of (TURN OFF) back, so as to realizing overvoltage protection and the double effects that improves running efficiency; Two groups of switch element K1, K2 hold by power supply node VDD in addition and are connected with two groups of coil L1, L2 of fan group FAN again.
Moreover switch element K1, K2 can be by diode, electronic switch or transistor formations such as (PNP or PMOS).At first see also shown in Figure 2, aforementioned switches element K1, K2 are made of a diode D1, D2 respectively, and its working method is to close when driver element 11, and another driver element 12 is when opening, have electric current I L2 to pass through on the coil L2, its path by VCC → VDD → coil L2 → driver element 12 to GND.
The coil L1 that closes simultaneously again then generates back electromotive force, and thereon by electric current I L1, its path is to earth terminal GND by coil L1 → diode D1 → VDD → coil L2 → driver element 12.
The coil L2 that closes simultaneously then generates back electromotive force, and thereon by electric current I L2, its path is to earth terminal GND by coil L2 → diode D2 → VDD → coil L1 → driver element 11.
Can obviously find out by the aforementioned circuit analysis, adopt circuit design of the present utility model, the counter electromotive force current that is generated when coil is cut off the electricity supply not only can reversely not attacked corresponding driver element, more can further be transferred to active coil, and can improve its task performance.
Please consult shown in Figure 3 again, this switch element K1, K2 also can be made of electronic switch S1, S2, its operation principle is identical with employing diode person, it only need be controlled two electronic switch S1, S2 and make alternate conduction, when driver element 11 is closed, even electronic switch S1 conducting, make counter electromotive force current IL1 by and be transferred on another coil L2; Otherwise, when driver element 12 is closed, then change conducting by electronic switch S2, make counter electromotive force current IL2 by and be transferred on another coil L1.
Other sees also shown in Figure 4; this switch element K1, K2 are that the transistor Q1, the Q2 that change by the collector electrode current limliting constitute; two transistor Q1, Q2 are connected with output OUT1, the OUT2 of emitter with two driver elements 11,12 respectively; its base stage is to be connected to power vd D again; its collector electrode is ground connection behind the series resistor respectively then; and make current limliting, protection purposes, effect is similar to diode.Moreover when switch element is when being made of the P channel fet, its wiring relation then connects power vd D with grid, connects driver element 11,12 outputs with drain electrode again, and its collector electrode then gives ground connection.
And when switch element K1, K2 were made of diode or transistor, it can generate in the CMOS of control circuit manufacturing process simultaneously, as the formation of PNP transistor in manufacture of semiconductor, as shown in Figure 5.
The unitary construction of relevant controlling circuit arrangement, see also shown in Figure 1, these two driver elements, 11,12 inputs are to be connected with a pulse-generating circuit 13, produce two groups of square-wave signals that differ 180 degree to drive two driver elements 11,12 respectively by this pulse-generating circuit 13, these pulse-generating circuit 13 inputs are to be connected with an amplifying circuit 14 or buffer, in the present embodiment, pulse-generating circuit 13 inputs are connected with an amplifying circuit 14, to be used the pole polarity of hall sensor 15 induction fans.
Seeing also shown in Figure 6ly again, is another preferred embodiment of the utility model, and aforesaid pulse-generating circuit 13 inputs change with a buffer 16 and are connected, in order to be used the pole polarity of Hall IC 17 induction fans.In the present embodiment, the model of this Hall IC is US1881UA SERIES, and its function is the pole of magnet (N.S) that is used for responding to the fan propeller inboard, and produces the sense of current of corresponding signal change fan loop, and makes the rotor continuous running.
Can find out concrete structure of the present utility model by above-mentioned explanation, below working method of the present utility model is described in detail as follows.See also shown in Figure 1, the utility model mainly is to produce a set of pulses by pulse-generating circuit 13, driver element 11 conductings that order is corresponding, and make electric current pass through the coil L1 of these driver element 11 correspondences, to rotate fan propeller, at the same time, 12 anti-phase each other of another driver elements are in cut-off state, when aforementioned rotor rotation, will produce changes of magnetic field, satisfy by hall sensor 15 and found out and the output potential signal, after amplifying circuit 14 amplifies, deliver to pulse-generating circuit 13, organize the pulse signals that differ 180 degree separately so that corresponding organize driver element 12 conductings separately, and make electric current another coil L2 that flows through by its generation, make rotor rotate an angle again, and by hall sensor 15 sense changes in magnetic fields once again, so that, make the fan propeller continuous running by the aforementioned process driven.
And when passing through the current interruptions of coil L1 or coil L2, to on stopping coil that electric current passing through, this moment generate the back electromotive force overvoltage, and at the driver element 11 of correspondence, cause overvoltage on 12 output OUT1 or the output OUT2, even this overvoltage is with switch element Q1 or switch element Q2 conducting that should correspondence, and make this transient overvoltage be transferred to another active coil through switch element Q1 or switch element Q2, not only can effectively prevent driver element 11 whereby, the 12 back electromotive force overvoltage that generated by moment are damaged, and can further make active coil obtain bigger energy, and can significantly improve running usefulness.
Hence one can see that; the utility model connects the switch element of switch current passage respectively at the driver element output of brush-less fan control circuit device; therefore when the coil reverse; the back electromotive force overvoltage that moment can be generated shifts gives active coil; and can reach the purpose of overvoltage protection; and can improve fan running usefulness significantly; the effect that relevant overvoltage protection is reached partly sees also shown in Figure 7; on among Fig. 7; two oscillograms are represented the work wave V (OUT1) that does not establish the utility model excess voltage protection and excess voltage protection has been set respectively down; V (OUT1) '; do not establish excess voltage protection as the brush-less fan control circuit device, the transient overvoltage of its output waveform V (OUT1) can be up to more than 25 volts.Control circuit device is after establishing with excess voltage protection again, and the transient overvoltage of its output waveform V (OUT1) ' then perseverance is lower than below 1 volt, this shows, the utility model truly has concrete actual effect for overvoltage protection.
And another excellent effect of this design is; when aforementioned switch element of relying realization overvoltage protection purpose is made of diode or transistor; it is as easy as rolling off a log to generate in the manufacturing process of semiconductor circuit; in other words; the brush-less fan control circuit device need not be added other elements in addition; only need in technology, to form simultaneously transistor; and constitute specific wiring relation; can realize the purpose of overvoltage protection easily; this shows that this excess voltage protection also possesses reducing cost, simplifies many advantages such as processing procedure and raising production capacity.
The above, it only is preferred embodiment of the present utility model, be not that the utility model is done any pro forma restriction, every foundation technical spirit of the present utility model all still belongs in the scope of technical solutions of the utility model any simple modification, equivalent variations and modification that above embodiment did.
Claims (7)
1, a kind of brush-less fan control circuit device with overvoltage protection; it is characterized in that its circuit is to be connected with a switch element respectively at the inner two driver element outputs of control circuit; when fan loop generates the back electromotive force overvoltage because of reverse; to make the corresponding switch element conducting that connects, give another active fan loop so as to transient overvoltage is shifted through switch element.
2, the brush-less fan control circuit device with overvoltage protection according to claim 1; the front end that it is characterized in that described two driver elements is provided with a pulse-generating circuit; this pulse-generating circuit is connected with an amplifying circuit, and this input amplifier then is connected with hall sensor (Hall sensor).
3, the brush-less fan control circuit device with overvoltage protection according to claim 1; the front end that it is characterized in that described two driver elements is provided with a pulse-generating circuit; this pulse-generating circuit is connected with a buffer, and this buffer input is for being connected with Hall IC (Hall IC).
4, according to claim 1,2 or 3 described brush-less fan control circuit device with overvoltage protection, it is characterized in that described switch element is to be made of a diode, it is held in addition and is connected with fan loop through power supply node.
5, according to claim 1,2 or 3 described brush-less fan control circuit device with overvoltage protection, it is characterized in that described switch element is that transistor by the collector electrode current limliting constitutes, this transistor base then is connected with fan loop through power supply node.
6, according to claim 1,2 or 3 described brush-less fan control circuit device with overvoltage protection; it is characterized in that described switch element is to be made of a P channel fet (PMOS); its grid is connected with fan loop through power supply node; its drain electrode is connected to the driver element output, and collector electrode then gives ground connection.
7, according to claim 1,2 or 3 described brush-less fan control circuit device with overvoltage protection, it is characterized in that described switch element is to be made of electronic switch, it is held in addition and is connected with fan loop through power supply node.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99205258U CN2368220Y (en) | 1999-03-24 | 1999-03-24 | Brushless fan control circuit device with over-voltage protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99205258U CN2368220Y (en) | 1999-03-24 | 1999-03-24 | Brushless fan control circuit device with over-voltage protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2368220Y true CN2368220Y (en) | 2000-03-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN99205258U Expired - Lifetime CN2368220Y (en) | 1999-03-24 | 1999-03-24 | Brushless fan control circuit device with over-voltage protection |
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| Country | Link |
|---|---|
| CN (1) | CN2368220Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018121727A1 (en) * | 2016-12-30 | 2018-07-05 | 深圳市优必选科技有限公司 | Drive control circuit and robot |
-
1999
- 1999-03-24 CN CN99205258U patent/CN2368220Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018121727A1 (en) * | 2016-12-30 | 2018-07-05 | 深圳市优必选科技有限公司 | Drive control circuit and robot |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Designer after: Qin Xuyuan Designer before: Tai Xuyuan |
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| COR | Change of bibliographic data |
Free format text: CORRECT: DESIGNER; FROM: TAI XUYUAN TO: QIN XUYUAN |
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| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |