CN202209300U - Fan control circuit capable of prolonging service life of DC (direct-current) carbon-brush motor of fan - Google Patents
Fan control circuit capable of prolonging service life of DC (direct-current) carbon-brush motor of fan Download PDFInfo
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- CN202209300U CN202209300U CN2011203075073U CN201120307507U CN202209300U CN 202209300 U CN202209300 U CN 202209300U CN 2011203075073 U CN2011203075073 U CN 2011203075073U CN 201120307507 U CN201120307507 U CN 201120307507U CN 202209300 U CN202209300 U CN 202209300U
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Abstract
The utility model discloses a fan control circuit capable of prolonging service life of a DC (direct-current) carbon-brush motor of a fan. The fan control circuit comprises an AC (alternating-current)-DC (direct-current) power converting circuit of the fan, a DC motor of the fan, a low-voltage protection circuit for a battery and a drive control circuit of the fan, wherein the AC-DC power converting circuit of the fan comprises a chargeable storage battery, a power supply switching-on and switching-off voltage reduction circuit, a battery charging circuit and an AC/DC power switching circuit; and the drive control circuit of the fan comprises a wind-speed control circuit of the fan, a motor current control circuit of the fan and a motor voltage control circuit of the fan. With the adoption of the fan control circuit, damage to the fan and the battery due to overlow power voltage can be avoided, working current of the DC carbon-brush motor of the fan can be stabilized in the rated working current value, meanwhile, the voltage can be controlled to be the lower limit of the rated working current of the fan, and the phenomenon of unstable working of the fan due to fluctuation of power voltage is eliminated, therefore, the service life of a domestic DC-AC double-purpose fan is prolonged.
Description
Technical field
The utility model relates to a kind of fan control circuitry, especially a kind of fan control circuitry that can prolong fan direct current carbon brush electrical machinery life.
Background technique
The life-span of the fan of existing use direct current carbon brush motor seriously receives the restriction of direct current carbon brush electrical machinery life; The life-span of carbon brush motor has only 1500 hours at present; The main cause that direct current carbon brush electrical machinery life stops is its inner carbon brush wearing and tearing, and the carbon dust under wearing away is piled up in the switching-over tank and caused the commutator short circuit to cause.Influence the principal element of direct current carbon brush electrical machinery life:
1, mains voltage fluctuation cause motor operating voltage unstable; Rotary speed unstabilization is fixed, thereby causes the vibration aggravation of motor self, and the collision between carbon brush for electric machine and commutator also aggravates; The rate of wear of carbon brush is just accelerated, thereby causes motor to be in following vicious circle state:
Mains voltage fluctuation → rotary speed unstabilization is fixed → and collision aggravation → carbon brush wearing and tearing quickenings → switching-over tank carbon distribution → motor working current between motor oscillating aggravation → carbon brush and commutator becomes between big → carbon brush and switching-over " arcing " phenomenon and becomes serious → carbon brush and wear and tear that quickening → switching-over tank carbon distribution → motor working current change is greatly.
2, along with the prolongation of service time of direct current carbon brush motor, (bearing oil is dry, component wear because of various factors for motor working current ... Deng) become big, thereby cause motor to be in following vicious circle state:
Motor working current become between big → carbon brush and switching-over " arcing " phenomenon become serious → carbon distribution → motor working current change greatly for carbon brush wearing and tearing quickenings → switching-over tank.
3, the starting current during direct current carbon brush electric motor starting be running current 7-8 doubly, very big at starting period because of inrush current, carbon brush with commutate between " arcing " phenomenon very serious, the wearing and tearing of starting period carbon brush are very serious, and are very serious to effect on service life.
The model utility content
In order to overcome the deficiency of above technology, the purpose of the utility model is to provide a kind of fan control circuitry, through to the operating voltage of fan direct current carbon brush motor and the optimization control of electric current, realizes the purpose in the life-span of prolongation fan direct current carbon brush motor.
The technological scheme that the utility model is taked is:
A kind of fan control circuitry that prolongs fan direct current carbon brush electrical machinery life, it comprises the fan ac-dc power conversion circuit that can realize two kinds of power supplys power supplies of power frequency AC and DC electrical source, crosses the fan direct current generator that cuts off current supply circuit when low and battery low-voltage protective circuit and with the fans drive control circuit of fan electromotor stable operation on its nominal operational parameters at supply voltage; Said fans drive control circuit is connected with fan direct current carbon brush motor, and said fan direct current generator and battery low-voltage protective circuit are serially connected between said fan ac-dc power conversion circuit and the said fans drive control circuit; Said fan ac-dc power conversion circuit comprises chargeable storage battery, civil power is converted to the AC/DC power supply switch circuit of the switch power reduction voltage circuit of the required low-voltage DC of direct current carbon brush motor, the battery charger that the charge in batteries electric current is provided and realization civil power and storage battery power supply switching; Said fans drive control circuit comprises the fan wind speed control system circuit of controlling fan motor rotational speed, the operating current of fan electromotor is stabilized in the fan electromotor current control circuit on its rated working current value and the operating voltage of fan electromotor is controlled on the lower limit of its rated operational voltage and eliminates the fan electromotor voltage control circuit of mains voltage fluctuation.
A kind of optimization as above technological scheme; Said fan direct current generator and battery low-voltage protective circuit comprise first triode; The emitter of said first triode connects AC/DC power supply switch circuit output terminal; Base stage is through first diode, first resistance and first capacity earth; Collector electrode is connected through second diode, first voltage-stabiliser tube and the base stage of second resistance with second triode, and the collector electrode of second triode inserts between said first resistance and first electric capacity, the output terminal of very said fan direct current generator of the current collection of said first triode and battery low-voltage protective circuit.
A kind of optimization as above technological scheme; Said AC/DC power supply switch circuit comprises relay; The coil of said relay is connected with the switch power reduction voltage circuit; Movable contact is connected with the input end of fan direct current generator with the battery low-voltage protective circuit, and normally-closed contact is connected with battery, and normally opened contact is connected with said switch power reduction voltage circuit; Relay is failure to actuate when no civil power, and fan electromotor is battery-powered; Relay coil energising when civil power, normal open switch is connected, and fan changes is supplied power by the switch power reduction voltage circuit.
As a kind of optimization of above technological scheme, said fan electromotor current control circuit and fan electromotor voltage control circuit are realized the control to the electric current and the voltage of fan electromotor through one group of voltage comparator respectively.
The beneficial effect of the utility model is:
The fan control circuitry that the utility model proposed is integrated with fan direct current generator, the battery low-voltage protective circuit of optimization; Can avoid crossing when low when supply voltage; Fan direct current carbon brush motor the phenomenon that stall causes motor short circuit, control circuit to burn occurs inadequately because of driving power; Simultaneously also can avoid battery to appear electric discharge phenomena, play the effect of protecting fan direct current carbon brush motor, battery and control circuit simultaneously.
The fan control circuitry that the utility model proposed also is integrated with the fans drive control circuit; The operating current of fan direct current carbon motor is stabilized in rated working current value; The motor working current that the elimination various factors causes becomes big phenomenon, thereby prolongs the life-span of family expenses AC/DC fan; Simultaneously fan direct current carbon motor the start up period, the starting current of fan direct current carbon motor also is stabilized in rated working current value, realize that constant current starts at a slow speed, prolong the life-span of family expenses AC/DC fan; Voltage control circuit with the lower limit of Control of Voltage at the motor rated operational voltage, and is eliminated the motor unstable operation phenomenon that mains voltage fluctuation cause, thereby is prolonged the life-span of family expenses AC/DC fan.
The utility model is through the effective degree of wear of control direct current carbon brush carbon brush for electric machine, thus will use the fan life of direct current carbon brush motor extend to 3000 little more than.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is described further:
Fig. 1 is the principle framework figure of the fan ac-dc power conversion circuit of the utility model;
Fig. 2 is the circuit diagram of the fan ac-dc power conversion circuit of the utility model;
Fig. 3 is the fan direct current generator of the utility model and the circuit diagram of battery low-voltage protective circuit;
Fig. 4 is the circuit diagram of the fan drive circuit of the utility model;
Fig. 5 is the complete circuit diagram of the utility model.
Embodiment
Referring to Fig. 1 and 5; The utility model discloses a kind of fan control circuitry that prolongs fan direct current carbon brush electrical machinery life, it comprises three big circuit such as fan ac-dc power conversion circuit, fan direct current generator and battery low-voltage protective circuit and fans drive control circuit.
Its fan ac-dc power conversion circuit can be realized power frequency AC, two kinds of power supply power supplies of DC electrical source (rechargeable battery), and its circuit theory diagrams are as shown in Figure 2.This circuit divides three parts: at first be the switch power reduction voltage circuit; Constitute the switch power reduction voltage circuit by D1, D2, D3, D4, D5, D6, D7, D8, D9, R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, Q1, TR1, U1, U2, U3, C1, C2, C3, C4, C5, C6, C7, C8, F1; Convert civil power to direct current carbon brush motor required low-voltage DC; Wherein U1 and U3 are amplifier IC, and U2 is a photo coupler; Next is a battery charger, forms battery charger by R13, D11, F2, BT1.As long as connect civil power, just can be to its charge in batteries that has; Be the AC/DC power supply switch circuit at last, constitute power-switching circuit by R1D9, D10, D12, J1, F2, BT1, when no civil power, fan is battery-powered, and relay coil energising when connecting civil power, normal open switch is connected, and fan transfers mains-supplied to.
The circuit theory of fan direct current generator and battery low-voltage protective circuit is as shown in Figure 3, and it is made up of R15, R16, R17, R18, R19, R20, R24, D13, D14, Z1, C9, C10, Q2, Q3.This partial circuit can be avoided crossing when low when supply voltage; Fan direct current carbon brush motor the phenomenon that stall causes motor short circuit, control circuit to burn occurs inadequately because of driving power; Simultaneously also can avoid battery to appear electric discharge phenomena, play the effect of protecting fan direct current carbon brush motor, battery and control circuit simultaneously.When energized; Q3, supplies power to Q2 through D14, Z1, R18 during the Q3 conducting through the on state that D13, R17, C9 have one period short time; Make the Q2 conducting; After the Q2 conducting, keep the on state of Q3, through of U4, the Q4 power supply of B point to fan direct current brush motor-drive circuit through R17, D13.When supply voltage is crossed when low, the A point voltage is crossed low Q2 can't conducting, forces Q3 to end, and cuts off U4, Q4 power supply, thereby turn-offs entire circuit.This circuit can be avoided crossing when low when supply voltage; Fan direct current carbon brush motor the phenomenon that stall causes motor short circuit, control circuit to burn occurs inadequately because of driving power; Simultaneously also can avoid battery to appear electric discharge phenomena, play the effect of protecting fan direct current carbon brush motor, battery and control circuit simultaneously.
The circuit theory of fans drive control circuit is as shown in Figure 4, and it is made up of R21, R22, R23, R24, R25, R26, R27, R28, R29, R30, R31, R32, D15, D16, D17, D18, D19, C11, C12, L1, S3, Q4, Q5, M1, U4, U5.Wherein D16, D17, D18, D19, S3 are fan wind speed control system circuit, and during switch S 3 closures, fan is in high wind shelves state; When switch S 3 is broken off; Reduce electric moter voltage through D16, D17, D18, D19, thereby reduce the wind speed of fan, make fan be in low wind shelves.U4 adopts amplifier IC358, and 5,6,7 pin and 3,2,1 pin are formed two groups of voltage comparators respectively, and R30, U5, R29, R28 are that two groups of voltage comparators of U4 are provided with reference potential, and wherein U5 can adopt 431 voltage stabilizing chips commonly used.Current sampling resistor R27 and first group of voltage comparator constitute the fan electromotor current control circuit; The operating current of fan direct current carbon brush motor is stabilized in rated working current value; The motor working current that the elimination various factors causes becomes big phenomenon, thereby prolongs the life-span of family expenses AC/DC fan; Simultaneously fan direct current carbon brush motor the start up period, the starting current of fan direct current carbon motor also is stabilized in rated working current value, realize that constant current starts at a slow speed, prolong the life-span of family expenses AC/DC fan.R31, R32 and second group of voltage comparator are formed the fan electromotor voltage control circuit; Fan direct current carbon brush electric moter voltage is controlled at the lower limit of its rated operational voltage; And eliminate the motor unstable operation phenomenon that mains voltage fluctuation cause, thereby prolong the life-span of family expenses AC/DC fan.
The integrated circuit schematic representation of the utility model can be referring to Fig. 5.
The above be the utility model preferred embodiment, it does not constitute the restriction to the utility model protection domain, so long as realize that with essentially identical means the purpose of the utility model all should belong to the protection domain of the utility model.
Claims (4)
1. fan control circuitry that prolongs fan direct current carbon brush electrical machinery life is characterized in that: it comprises the fan ac-dc power conversion circuit that can realize power frequency AC and two kinds of power supplys power supplies of DC electrical source, crosses the fan direct current generator that cuts off current supply circuit when low and battery low-voltage protective circuit and with the fans drive control circuit of fan electromotor stable operation on its nominal operational parameters at supply voltage; Said fans drive control circuit is connected with fan direct current carbon brush motor, and said fan direct current generator and battery low-voltage protective circuit are serially connected between said fan ac-dc power conversion circuit and the said fans drive control circuit; Said fan ac-dc power conversion circuit comprises chargeable storage battery, civil power is converted to the AC/DC power supply switch circuit of the switch power reduction voltage circuit of the required low-voltage DC of direct current carbon brush motor, the battery charger that the charge in batteries electric current is provided and realization civil power and storage battery power supply switching; Said fans drive control circuit comprises the fan wind speed control system circuit of controlling fan motor rotational speed, the operating current of fan electromotor is stabilized in the fan electromotor current control circuit on its rated working current value and the operating voltage of fan electromotor is controlled on the lower limit of its rated operational voltage and eliminates the fan electromotor voltage control circuit of mains voltage fluctuation.
2. a kind of fan control circuitry that prolongs fan direct current carbon brush electrical machinery life according to claim 1; It is characterized in that: said fan direct current generator and battery low-voltage protective circuit comprise first triode (Q3); The emitter of said first triode (Q3) connects AC/DC power supply switch circuit output terminal; Base stage is through first diode (D13), first resistance (R17) and first electric capacity (C9) ground connection; Collector electrode is connected through second diode (D14), first voltage-stabiliser tube (Z1) and the base stage of second resistance (R18) with second triode (Q2); The collector electrode of second triode (Q2) inserts between said first resistance (R17) and first electric capacity (C9), the output terminal of very said fan direct current generator of the current collection of said first triode (Q3) and battery low-voltage protective circuit.
3. a kind of fan control circuitry that prolongs fan direct current carbon brush electrical machinery life according to claim 1; It is characterized in that: said AC/DC power supply switch circuit comprises relay (J1); The coil of said relay is connected with the switch power reduction voltage circuit; Movable contact is connected with the input end of fan direct current generator with the battery low-voltage protective circuit, and normally-closed contact is connected with battery, and normally opened contact is connected with said switch power reduction voltage circuit; Relay is failure to actuate when no civil power, and fan electromotor is battery-powered; Relay coil energising when civil power, normal open switch is connected, and fan changes is supplied power by the switch power reduction voltage circuit.
4. a kind of fan control circuitry that prolongs fan direct current carbon brush electrical machinery life according to claim 1 is characterized in that: said fan electromotor current control circuit and fan electromotor voltage control circuit are realized the control to the electric current and the voltage of fan electromotor through one group of voltage comparator (U4) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203075073U CN202209300U (en) | 2011-08-23 | 2011-08-23 | Fan control circuit capable of prolonging service life of DC (direct-current) carbon-brush motor of fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203075073U CN202209300U (en) | 2011-08-23 | 2011-08-23 | Fan control circuit capable of prolonging service life of DC (direct-current) carbon-brush motor of fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202209300U true CN202209300U (en) | 2012-05-02 |
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ID=45988849
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203075073U Withdrawn - After Issue CN202209300U (en) | 2011-08-23 | 2011-08-23 | Fan control circuit capable of prolonging service life of DC (direct-current) carbon-brush motor of fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202209300U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102297148A (en) * | 2011-08-23 | 2011-12-28 | 广东金莱特电器股份有限公司 | Fan control circuit for prolonging service life of direct current carbon brush motor of fan |
| CN105065313A (en) * | 2015-08-07 | 2015-11-18 | 深圳市三巨电机有限公司 | Alternating and direct current fan control device |
-
2011
- 2011-08-23 CN CN2011203075073U patent/CN202209300U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102297148A (en) * | 2011-08-23 | 2011-12-28 | 广东金莱特电器股份有限公司 | Fan control circuit for prolonging service life of direct current carbon brush motor of fan |
| CN105065313A (en) * | 2015-08-07 | 2015-11-18 | 深圳市三巨电机有限公司 | Alternating and direct current fan control device |
| CN105065313B (en) * | 2015-08-07 | 2017-08-08 | 深圳市三巨电机有限公司 | A kind of alternating current-direct current fan control device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120502 Effective date of abandoning: 20130227 |
|
| RGAV | Abandon patent right to avoid regrant |