CN2535973Y - Power source converting circuit of D.C. brushless fan motor - Google Patents
Power source converting circuit of D.C. brushless fan motor Download PDFInfo
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- CN2535973Y CN2535973Y CN02230309U CN02230309U CN2535973Y CN 2535973 Y CN2535973 Y CN 2535973Y CN 02230309 U CN02230309 U CN 02230309U CN 02230309 U CN02230309 U CN 02230309U CN 2535973 Y CN2535973 Y CN 2535973Y
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Abstract
The utility model relates to a power conversion circuit for a direct current brushless fan motor, which is characterized in that the power conversion circuit comprises a rectification circuit, a power smooth circuit, and a low-voltage power stabilivolt circuit. The rectification circuit rectifies the alternating current voltage outputted from the outside into pulse direct current to a motor drive circuit, and the power smooth circuit appropriately abates the voltage sudden changes of the pulse direct current voltage which is output from the rectification circuit, reduces the cycle time of complete return-to-zero adjustment of the pulse voltage quasi-position, and is connected smooth pulse direct current voltage with a motor coil winding. The pulse direct current voltage output from the rectification circuit is stabilized appropriately on low-voltage quasi-position by the low-voltage power stabilivolt circuit, and then is output to the motor drive circuit.
Description
Technical field
The utility model relates to a kind of power-switching circuit of brush DC fan motor, and it is particularly to the drive circuit that power-switching circuit is converted to AC power direct current power supply brush DC fan motor.
Background technology
Use the ac fan motor demand trend of AC power not only to want the miniaturization of reduced volume at present, and will improve the high efficiency of air quantity.The design architecture of conventional AC fan motor is to utilize the alternating current impression mode to drive between rotor and the stator coil.The shortcoming of conventional AC fan motor, in order to cooperate the high voltage source of general AC 220V or AC110V, the coil windings of stator and silicon steel sheet core framework need increase design, so the stator framework is subjected to certain volume restrictions in the trend toward miniaturization development.Because stator is subjected to certain volume restrictions, if when being applied to small-sized fans, rotor blade and gas channel also are subjected to certain volume restrictions; So on fan design, be difficult to improve air quantity.
Then owing to have simple stator framework, be applicable to the miniaturization fan of reduced volume as for traditional brush DC fan motor, not only have the improvement design space of improving air quantity relatively, and can reduce manufacturing cost.
Referring to Fig. 1, be the circuit diagram of the drive circuit of commonly using two-phase brush DC fan motor.The drive circuit of two-phase brush DC fan motor comprises the first coil windings L1, the second coil windings L2, the first transistor Q1, transistor seconds Q2, five resistance R 1, R2, R3, R4, R5, a Hall element IC1, a driving element IC2 and capacitor C 1.The pole change of being detected the permanent magnet of rotor by this Hall element IC1 forms faint Hall voltage, this Hall voltage is amplified through driving element, produce the square-wave signal of alternate by output 01 and 02, export the first transistor Q1 and transistor seconds Q2 to, mat this first transistor Q1 and transistor seconds Q2 produce the switch start and alternately change the sense of current, so that the rotation of the rotor of the excitatory CD-ROM drive motor of winding.
Referring to Fig. 2, for commonly using the circuit diagram of drive circuit of single-phase DC brushless fan motor.Single-phase DC brushless fan motor drive circuit comprises a coil windings L1, four transistor Q1, Q2, Q3, Q4, five resistance R 1, R2, R3, R4, R5, a Hall element IC1, a driving element IC2 and capacitor C 1.The pole change of being detected the permanent magnet of rotor by this Hall element IC1 forms faint Hall voltage, exports this Hall voltage to driving element IC2 and is also amplified, and is produced the square-wave signal of alternate by output O1 and O2.The bridge-type motor winding drive circuit that this signal is formed through transistor Q1, Q2, Q3, Q4 produces the switch start and alternately changes the sense of current, so that the rotation of the rotor of excitatory CD-ROM drive motor.
Though the drive circuit of above-mentioned two-phase or single-phase DC brushless fan motor has advantages such as reduced volume, simple structure, low cost of manufacture, but it only is useful in operation under the low dc voltage, therefore its range of application is subjected to voltage limit, in other words, traditional brush DC fan motor is not suitable for the AC high voltage.If the drive circuit of brush DC fan motor is suitably improved, make it can be applied to general AC power, so fan not only has outside reduced volume, simple structure, the low cost of manufacture, and has the suitable voltage range of expansion.
Summary of the invention
The utility model main purpose provides a kind of power-switching circuit of brush DC fan motor, it utilizes a power-switching circuit that the high voltage AC power is converted to the drive circuit of direct current power supply brush DC fan motor, makes to the utlity model has to promote to enlarge the effect that is suitable for voltage range.
The utility model secondary objective provides a kind of power-switching circuit of brush DC fan motor, it utilizes power-switching circuit that AC power is converted to DC power supply, this power-switching circuit comprises a rectification circuit, a power supply smoothing circuit and the low-tension supply voltage stabilizing circuit supplying DC power source drive circuit to the brush DC fan motor, makes to the utlity model has the effect of stablizing start.
The utility model is achieved through the following technical solutions: a kind of power-switching circuit of brush DC fan motor is characterized in that: this power-switching circuit comprises a rectification circuit, a power supply smoothing circuit, a low-tension supply voltage stabilizing circuit; This rectification circuit with the AC supply voltage rectification of outside input for the direct voltage of pulsation to motor drive circuit, this power supply smoothing circuit suitably slows down from the voltage of this rectification circuit output ripple direct voltage anxious according to variation, and reduces a pulsating voltage standard cycle time of making zero fully and level and smooth pulsating dc voltage is connected to the motor coil winding; The pulsating dc voltage that this low-tension supply voltage stabilizing circuit is exported this rectification circuit exports motor drive circuit to after suitably being stabilized in the accurate position of a low-voltage.Wherein:
This rectification circuit comprises a diode.
This power supply smoothing circuit is made up of a diode and an electric capacity.
This low-tension supply voltage stabilizing circuit is made up of four resistance, an electric capacity, a Zener diode.
This power-switching circuit links to each other with two-phase brush DC fan motor drive circuit.
This power-switching circuit links to each other with single-phase DC brushless fan motor drive circuit.
This drive circuit comprises the two ends that two constant-current circuits and two switching circuits are connected to the single phase winding winding respectively.
This constant-current circuit is made up of a field-effect transistor, a diode, a resistance and an electric capacity.
This switching circuit is made up of two resistance and a field-effect transistor.
Because the utility model utilizes power-switching circuit the high voltage AC power to be converted to the drive circuit of direct current power supply brush DC fan motor, then promote and enlarge the effect of suitable voltage range, this power-switching circuit comprises a rectification circuit, a power supply smoothing circuit and a low-tension supply voltage stabilizing circuit supplying DC power source to the drive circuit of brush DC fan motor again, the utlity model has the effect of stablizing start and make.
Description of drawings
In order to allow above-mentioned and other purposes of the present utility model, feature and advantage understand by clearer and more definite quilt, hereinafter will be especially exemplified by the utility model preferred embodiment, and cooperate appended graphicly, be described in detail below:
Fig. 1, for commonly using the circuit diagram of two-phase brush DC fan motor drive circuit.
Fig. 2, for commonly using the circuit diagram of single-phase DC brushless fan motor drive circuit.
Fig. 3, be the framework calcspar of the utility model brush DC fan motor power-switching circuit.
Fig. 4, be applied to the circuit diagram of two-phase brush DC fan motor for the power-switching circuit of the brush DC fan motor of the utility model first preferred embodiment.
Fig. 5, be the accurate digit wave form figure of each node of power-switching circuit of the brush DC fan motor of the utility model preferred embodiment.Wherein:
A is the accurate digit wave form figure of the utility model AC power.
B is the accurate digit wave form figure of the utility model through the node Vctlr of rectification.
C is the accurate digit wave form figure of the utility model through the node Vcoil of smoothing processing.
D is the accurate digit wave form figure of the node Vout of the utility model coils winding.
E is the accurate digit wave form figure of the node Vo2 of the utility model driving element output.
F is the accurate digit wave form figure of the utility model through the node Vcc of voltage stabilizing processing.
Fig. 6, be applied to the circuit diagram of single-phase DC brushless fan motor for the power-switching circuit of the brush DC fan motor of the utility model second preferred embodiment.
Embodiment
The power-switching circuit of brush DC fan motor of the present utility model, mainly comprise a rectification circuit, a power supply smoothing circuit and a low-tension supply voltage stabilizing circuit, this power-switching circuit is converted to the drive circuit of direct current power supply to the brush DC fan motor with AC power.
Power-switching circuit of the present utility model is applied to two-phase or single-phase DC brushless fan motor, utilizes first and second preferred embodiment suitably to implement.
Referring to Fig. 3, be the framework calcspar of the power-switching circuit of the utility model brush DC fan motor.This power-switching circuit 10 is connected in the drive circuit 1 of fan motor, this power-switching circuit 10 comprises a rectification circuit 11, a power supply smoothing circuit 12 and a low-tension supply voltage stabilizing circuit 13, this power-switching circuit 10 is converted to direct current power supply to brush DC fan motor drive circuit 1 with AC power, this rectification circuit 11 is with the direct voltage of AC supply voltage rectification for pulsing of outside input, to provide motor drive circuit required DC power supply.It is anxious according to variation that these rectification circuit 11 output ripple direct voltages suitably slow down voltage through this power supply smoothing circuit 12, and reduce the cycle time of making zero fully in the accurate position of pulsating voltage, and the level and smooth degree of power supply is then adjusted according to the motor characteristics trace.By the drive circuit that drive IC constituted is complicated integrated circuit, it needs more stable operating voltage to stablize start to guarantee drive IC, therefore these rectification circuit 11 output ripple direct voltages must export drive circuit 1 to again after these low-tension supply voltage stabilizing circuit 13 voltage stabilizings.
Be applied to the circuit diagram of two-phase brush DC fan motor referring to Fig. 4, for the power-switching circuit of the brush DC fan motor of the utility model first preferred embodiment.
Referring to Fig. 5, be the accurate digit wave form figure of each node of power-switching circuit of the brush DC fan motor of the utility model preferred embodiment.
Referring to Fig. 4, be the utility model first preferred embodiment, corresponding being arranged at of a power-switching circuit part of two-phase brush DC fan motor commonly used two-phase d.c. motor drive circuit 1, thereby in element same section employing phase diagram sign, with be easy to understand the utility model preferred embodiment and commonly use between difference, the part technology contents of first preferred embodiment has been disclosed in the description of commonly using of Fig. 1, incorporate reference in this, will not give unnecessary details in detail.
Referring to shown in Figure 4, two-phase brush DC fan motor drive circuit 1 connects a power-switching circuit 10, and this power-switching circuit 10 comprises a rectification circuit 11, a power supply smoothing circuit 12 and a low-tension supply voltage stabilizing circuit 13; This rectification circuit 11 comprises a diode D1 to carry out halfwave rectifier by the AC ac power input end and becomes dc pulse moving voltage Vctlr, with supply Hall element IC1, driving element IC2 and motor coil winding L 1, the excitatory required DC power supply voltage of L2.A among Fig. 5 discloses the accurate digit wave form figure of AC power; B among Fig. 5 discloses the accurate digit wave form figure through the node Vctlr of rectification; C among Fig. 5 discloses the accurate digit wave form figure through the node Vcoil of smoothing processing.
This power supply smoothing circuit 12 is made up of a diode D2 and a capacitor C 2, the pulsating dc voltage in these rectification circuit 11 output DC sources, through this this pulsating dc voltage of capacitor C 2 filtering, make zero accurate position of the half wave cycles of this pulsating dc voltage obtain to promote, form level and smooth pulsating dc voltage Vcoil (shown in the C among Fig. 5) through capacitor C 2 discharges.
So can not release fully in negative half wave cycles in the half wave cycles that reduces this level and smooth pulsating dc voltage Vcoil accurate position of making zero, with the acute variation of the pulsation exciting curent of mitigation winding, to avoid taking place the caused electric dither noise of exciting curent acute variation.In addition, this diode D2 has reverse high-impedance behavior, and with the higher pulsating dc voltage Vcoil reverse flow ingress Vctlr after stoping smoothly, this diode D2 is in order to isolate between two node Vcoil and the Vctlr, to keep the accurate position of the low direct current of node Vctlr.So that provide the accurate position of low direct current voltage to use for Hall element IC1 and motor driven element IC2.
Form by four resistance R 5, R6, R7, R8, a capacitor C 1, a Zener diode ZD1 referring to Fig. 4, this low-tension supply voltage stabilizing circuit 13.These four resistance R 5, R6, R7, R8 form the pressure drop circuit, pulsating direct current high voltage by these rectification circuit 11 outputs is carried out pressure drop, these four resistance R 5, R6, R7, R8 and capacitor C 1 are formed filter circuit simultaneously, form the accurate digit wave form (shown in F among Fig. 5) of node Vcc with smooth voltage.This Zener diode ZD1 then has pressure stabilization function, and the accurate position of node Vcc is stabilized in a predetermined accurate position of direct current, uses in order to supply Hall element IC1 and motor driven element IC2.
D among Fig. 5, be accurate digit wave form figure through the node Vout of winding; E among Fig. 5, be the accurate digit wave form figure of the node Vo2 of driving element output.
These low-tension supply voltage stabilizing circuit 13 supply galvanic currents press accurate position to Hall element IC1 and driving element IC2; This driving element IC2 output drive signal is to transistor Q1 and Q2, the accurate digit wave form of node Vo2 output voltage (shown in E among Fig. 5) for example, and its week is with drive motor coils winding L 1 and L2.For example export square-wave signal to transistor Q1 by this driving element IC2, by the stable switch effect drive motor coils winding L 1 of this transistor Q1, this winding coil L1 output this moment square wave is as the accurate position of node Vout (shown in D among Fig. 5).
Referring among Fig. 5 shown in the D, the accurate position of node Vout shows that influence that the motor coil winding is subjected to the accurate position of pulsafeeder presents and intermittently cuts the ripple phenomenon that run well but this phenomenon does not influence motor, this intermittently cuts the average power that the ripple phenomenon promptly reduces the input electric power of motor.Therefore, motor only needs the coil windings of the low winding or the low number of turn, and with the number of turn reduction of coil windings, the thickness of motor stator also reduces, and so motor not only is applicable to alternating current, and the while also reduces motor thickness and is applicable to miniature motor.
Commonly use the single-phase DC motor drive circuit and the first preferred embodiment AC power change-over circuit element referring to Fig. 6, for corresponding being arranged on of power-switching circuit of the utility model second preferred embodiment single-phase DC brushless fan motor, thereby adopt same reference numbers to indicate at the element same section so as to understand the utility model preferred embodiment and commonly use between difference.The part technology contents of second preferred embodiment has been disclosed in the AC power change-over circuit description of the drive circuit of commonly using single-phase DC brushless motor and Fig. 4 of Fig. 2, incorporates reference in this, will not give unnecessary details in detail.
The two ends a and the b that comprise two constant-current circuits and two switching circuits difference supply coil winding L 1 referring to the drive circuit 1 ' of Fig. 6, second preferred embodiment.Wherein field-effect transistor Q1, diode D3, resistance R 9, capacitor C 3 are formed first constant-current circuit; Field-effect transistor Q2, diode D4, resistance R 10, capacitor C 4 are formed second constant-current circuit; Resistance R 1, R3, field-effect transistor Q3 form first switching circuit, and resistance R 2, R4, field-effect transistor Q4 form the second switch circuit; Driving element IC2 output drive signal to control this field-effect transistor Q3 and the effect of Q4 alternation switch, forms voltage quasi position variation at motor coil winding L 1 two ends a and b to field-effect transistor Q3 and Q4.
The start that this driving element IC2 controls this field-effect transistor Q3 and the effect of Q4 alternation switch illustrates as follows.Transistor Q3 is under opening, extraction electrode (Drain) and source electrode (Source) at this transistor Q3 are conducting state, make the end a of coil windings L1 be low level, this moment, the electric current by a diode D5 caused the accurate position of the gate of transistor Q1 to be lower than the about 0.7V of source electrode, at the gate of transistor Q1 because of reverse biased transition formation closed condition; Transistor Q4 in off position down simultaneously, extraction electrode (Drain) and source electrode (Source) at this transistor Q4 are conducting state, make the end b of coil windings L1 be high levle, transistor Q4 ends and does not have electric current to pass through diode D6 at this moment, impels the gate conducting of this transistor Q4 by the forward current of diode D4 and resistance R 10.
In brief, this moment, transistor Q1 and Q4 formed closed condition, and transistor Q2 and Q4 then form opening.Pass through extraction electrode and the source electrode of transistor Q2 earlier from the level and smooth pulsating dc voltage Vcoil of this power supply smoothing circuit 12, flow into from the b of coil windings L1 end, flow out by a end again, get back to ground connection by extraction electrode and the source electrode of transistor Q3 at last, finish a work period of motor running.Relative, another work period of motor running, then transistor Q1, Q2, Q3, Q4 were unlatching and the closed condition opposite with aforementioned activities.
Claims (9)
1, a kind of power-switching circuit of brush DC fan motor is characterized in that: this power-switching circuit comprises a rectification circuit, a power supply smoothing circuit, a low-tension supply voltage stabilizing circuit; This rectification circuit with the AC supply voltage rectification of outside input for the direct voltage of pulsation to motor drive circuit, this power supply smoothing circuit suitably slows down from the voltage of this rectification circuit output ripple direct voltage anxious according to variation, and reduces a pulsating voltage standard cycle time of making zero fully and level and smooth pulsating dc voltage is connected to the motor coil winding; The pulsating dc voltage that this low-tension supply voltage stabilizing circuit is exported this rectification circuit exports motor drive circuit to after suitably being stabilized in the accurate position of a low-voltage.
2, the power-switching circuit of brush DC fan motor according to claim 1 is characterized in that: this rectification circuit comprises a diode.
3, the power-switching circuit of brush DC fan motor according to claim 1 is characterized in that: this power supply smoothing circuit is made up of a diode and an electric capacity.
4, the power-switching circuit of brush DC fan motor according to claim 1 is characterized in that: this low-tension supply voltage stabilizing circuit is made up of four resistance, an electric capacity, a Zener diode.
5, the power-switching circuit of brush DC fan motor according to claim 1 is characterized in that: this power-switching circuit links to each other with two-phase brush DC fan motor drive circuit.
6, the power-switching circuit of brush DC fan motor according to claim 1 is characterized in that: this power-switching circuit links to each other with single-phase DC brushless fan motor drive circuit.
7, the power-switching circuit of brush DC fan motor according to claim 6 is characterized in that: this drive circuit comprises the two ends that two constant-current circuits and two switching circuits are connected to the single phase winding winding respectively.
8, the power-switching circuit of brush DC fan motor according to claim 7 is characterized in that: this constant-current circuit is made up of a field-effect transistor, a diode, a resistance and an electric capacity.
9, the power-switching circuit of brush DC fan motor according to claim 7 is characterized in that: this switching circuit is made up of two resistance and a field-effect transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN02230309U CN2535973Y (en) | 2002-03-29 | 2002-03-29 | Power source converting circuit of D.C. brushless fan motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN02230309U CN2535973Y (en) | 2002-03-29 | 2002-03-29 | Power source converting circuit of D.C. brushless fan motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2535973Y true CN2535973Y (en) | 2003-02-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN02230309U Expired - Lifetime CN2535973Y (en) | 2002-03-29 | 2002-03-29 | Power source converting circuit of D.C. brushless fan motor |
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| Country | Link |
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| CN (1) | CN2535973Y (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1654891B (en) * | 2004-02-13 | 2010-04-28 | 富士电机系统株式会社 | Blower fan filtering unit |
| CN104154016A (en) * | 2013-05-15 | 2014-11-19 | 奇鋐科技股份有限公司 | Fan system |
| CN105186949A (en) * | 2014-05-27 | 2015-12-23 | 美蓓亚株式会社 | Motor Driving Control Method And Motor Driving Control Device |
| CN105450141A (en) * | 2015-12-31 | 2016-03-30 | 杭州士兰微电子股份有限公司 | AC motor driving device and driving method |
| CN105827163A (en) * | 2015-01-22 | 2016-08-03 | 美蓓亚株式会社 | Motor current controller and method for controlling motor current |
| CN106208848A (en) * | 2015-05-27 | 2016-12-07 | 美蓓亚株式会社 | Motor drive control device and motor drive control method |
| CN106253772A (en) * | 2015-06-05 | 2016-12-21 | 美蓓亚株式会社 | Motor drive control device and motor drive control method |
| US20230005639A1 (en) * | 2019-12-09 | 2023-01-05 | Robert Bosch Gmbh | Electrical conductor made of graphene and/or carbon nanotubes having coated joints |
-
2002
- 2002-03-29 CN CN02230309U patent/CN2535973Y/en not_active Expired - Lifetime
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1654891B (en) * | 2004-02-13 | 2010-04-28 | 富士电机系统株式会社 | Blower fan filtering unit |
| CN104154016A (en) * | 2013-05-15 | 2014-11-19 | 奇鋐科技股份有限公司 | Fan system |
| CN105186949A (en) * | 2014-05-27 | 2015-12-23 | 美蓓亚株式会社 | Motor Driving Control Method And Motor Driving Control Device |
| CN105186949B (en) * | 2014-05-27 | 2018-06-29 | 美蓓亚株式会社 | Motor drive control method and motor drive control device |
| CN105827163B (en) * | 2015-01-22 | 2018-09-07 | 美蓓亚株式会社 | Current of electric control device and current of electric control method |
| CN105827163A (en) * | 2015-01-22 | 2016-08-03 | 美蓓亚株式会社 | Motor current controller and method for controlling motor current |
| CN106208848B (en) * | 2015-05-27 | 2018-12-07 | 美蓓亚株式会社 | Motor drive control device and motor drive control method |
| CN106208848A (en) * | 2015-05-27 | 2016-12-07 | 美蓓亚株式会社 | Motor drive control device and motor drive control method |
| CN106253772A (en) * | 2015-06-05 | 2016-12-21 | 美蓓亚株式会社 | Motor drive control device and motor drive control method |
| CN106253772B (en) * | 2015-06-05 | 2018-09-04 | 美蓓亚株式会社 | Motor drive control device and motor drive control method |
| CN105450141A (en) * | 2015-12-31 | 2016-03-30 | 杭州士兰微电子股份有限公司 | AC motor driving device and driving method |
| CN105450141B (en) * | 2015-12-31 | 2019-03-26 | 杭州士兰微电子股份有限公司 | AC motor drives and its driving method |
| US20230005639A1 (en) * | 2019-12-09 | 2023-01-05 | Robert Bosch Gmbh | Electrical conductor made of graphene and/or carbon nanotubes having coated joints |
| US11875913B2 (en) * | 2019-12-09 | 2024-01-16 | Robert Bosch Gmbh | Electrical conductor made of graphene and/or carbon nanotubes having coated joints |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20120329 Granted publication date: 20030212 |