CN2742674Y - DC motor speed regulating device - Google Patents
DC motor speed regulating device Download PDFInfo
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- CN2742674Y CN2742674Y CNU2004200943290U CN200420094329U CN2742674Y CN 2742674 Y CN2742674 Y CN 2742674Y CN U2004200943290 U CNU2004200943290 U CN U2004200943290U CN 200420094329 U CN200420094329 U CN 200420094329U CN 2742674 Y CN2742674 Y CN 2742674Y
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Abstract
The utility model discloses a speed regulating device of a direct current motor, which comprises a power supply, a switch-mode voltage regulato, the peripheral circuit of the switch-mode voltage regulator, and a feedback-voltage resistance network. The power supply provides the input voltage to the switch-mode voltage regulator and the peripheral circuit of the switch-mode voltage regulator. The partial-voltage resistance change of the feedback-voltage resistance network is controlled by the switch-mode voltage regulator and the peripheral circuit of the switch-mode voltage regulator, and thereby the output voltage of the feedback-voltage resistance network can be regulated. The rotational speed of the direct current motor is controlled by the output voltage of the feedback-voltage resistance network. Compared with the speed regulating technique of existing direct current motor, the device of the utility model with low cost, small volume, low energy consumption and high reliability just uses contact points (poles or level signals) to control, and the effect of step speed regulation is realized. The conversion efficiency of electric energy is improved.
Description
Technical field
The utility model relates to direct current machine, is specifically related to a kind of dc motor drive.
Background technology
All require under many circumstances the rotating speed of direct current machine is regulated, as: 1, reduce noise, direct current machine is higher to the demand that suppresses noise, so noise reduction is the main purpose of speed governing.2, economize on electricity does not reduce rotating speed when not needing oepration at full load at full speed, helps economize on electricity.3, increase the service life, DC motor speed-regulating helps prolonging the useful life of motor.
Existing DC motor speed-regulating control technology mainly contains: 1, resistor network dividing potential drop speed governing, resistor network dividing potential drop speed adjusting technique is a kind of of variable voltage control, and the direct connection in series-parallel of resistance in electric power network, is realized the purpose of speed governing by electric resistance partial pressure.This technology is mainly used in the very light alignment circuit of load, (V for example when load is heavier
O=48VDC, the above load of IO=1A), ohmically power consumption is bigger, and caloric value is higher, need select high-power resistance for use, and its volume is big, stability and poor reliability; 2, PWM (pulse width modulation) speed regulating control, PWM speed adjusting technique are to change by regulating impulse width realization output voltage to realize speed regulating control, but PWM speed regulating control technical costs is higher, and the circuit complexity is not suitable for DC motor speed-regulating occasion cheaply.
The utility model content
The purpose of this utility model provides a kind of dc motor drive, overcomes the defective of the stability of dc motor drive in the prior art and poor reliability, cost height, circuit complexity.
The technical solution of the utility model is as follows:
A kind of dc motor drive, it comprises power supply, switch mode voltage regulator and peripheral circuit thereof and feedback voltage resistor network, described power supply provides the input voltage of described switch mode voltage regulator and peripheral circuit thereof, described switch mode voltage regulator and peripheral circuit thereof are controlled the dividing potential drop change in resistance of described feedback voltage resistor network, thereby regulate the output voltage of described feedback voltage resistor network, the rotating speed of the output voltage control direct current machine of described feedback voltage resistor network.
Described device, wherein, described power supply output DC source voltage is to described switch mode voltage regulator and peripheral circuit thereof.
Described device wherein, is provided with a plurality of limits in described switch mode voltage regulator and the peripheral circuit thereof, by controlling the connecting and disconnecting of described limit, the divider resistance resistance of described feedback voltage resistor network is changed regulate its output voltage.
Described device, wherein, described switch mode voltage regulator and peripheral circuit thereof carry out filtering to input supply voltage and output voltage, and the control switch mode voltage regulator enables.
Described device, wherein, described limit is set to temperature switch, limit switch or flow switch.
Described device, wherein, described limit is set to relay or contacts of contactor.
Described device, wherein, described limit is set to logic level signal.
Described device, wherein, described switch mode voltage regulator and peripheral circuit thereof comprise switch mode voltage regulator, the filter capacitor that links to each other with its voltage input end, the Schottky diode that links to each other with its voltage output end, the inductance that links to each other with its voltage output end, the filter capacitor that links to each other with described inductance, the current-limiting resistance that links to each other with its voltage input end, a plurality of divider resistances, a plurality of limits, the wherein said filter capacitor that links to each other with its voltage input end, the described Schottky diode that links to each other with its voltage output end, the described inductance that links to each other with its voltage output end, the other end of the filter capacitor that described and described inductance links to each other is connected to reference to the ground voltage end, the other end of described current-limiting resistance links to each other with the ON/OFF pin of described switch mode voltage regulator, limit one end in described a plurality of limit links to each other with the ON/OFF pin of described switch mode voltage regulator, its other end is connected to reference to the ground voltage end, an end links to each other with described inductance behind described a plurality of divider resistance and other limit serial or parallel connection, and the other end is connected to reference to the ground voltage end.
Described device, wherein, the resistance of described feedback voltage resistor network is set to the 1/4W metalfilmresistor respectively.
Described device, wherein, the quantity of described limit is set to 3.
Adopt device described in the utility model, compare with existing DC motor speed-regulating technology, only use contact (limit or level signal) control, realized the progress of low cost, small size, low energy consumption, high reliability, reach the effect of step speed regulation, improved energy conversion efficiency.
Description of drawings
Fig. 1 is a composition block diagram of the present utility model;
Fig. 2 is direct current machine three-step timing circuit theory diagrams of the present utility model;
Fig. 3 is DC fan three-step timing circuit theory diagrams of the present utility model;
Fig. 4 is a LM2576HVT-ADJ chip schematic diagram in the DC fan three-step timing circuit of the present utility model.
Embodiment
Be described in further detail below in conjunction with the enforcement of accompanying drawing the technical solution of the utility model.
As shown in Figure 1, dc motor drive of the present utility model is made up of three parts: power supply, switch mode voltage regulator and peripheral circuit thereof, feedback voltage resistor network.
Power supply is a DC power supply voltage, is the input voltage of switch mode voltage regulator.Switch mode voltage regulator and peripheral circuit thereof are the main parts of this speed-regulating scheme, and filtering, the control switch mode voltage regulator finished input supply voltage and output voltage enable etc.Connecting and disconnecting by the control contact change feedback voltage resistor network divider resistance resistance and regulate output voltage.The feedback voltage resistor network is the feedback network of switch mode voltage regulator and peripheral circuit thereof, and this resistor network resistance is small-power resistance all, generally selects for use the 1/4W metalfilmresistor to get final product, and is different from the resistance that uses in the speed governing of resistor network dividing potential drop.The resistor network two ends are output voltage, and this output voltage is directly controlled the small-power direct current machine.
Fig. 2 is direct current machine three-step timing circuit theory diagrams of the present utility model.As shown in the figure, speed regulating device by a slice switch mode voltage regulator U1 and input filtering capacitor C 1 thereof, output Schottky diode D1, output inductance L 1, output filter capacitor C2, resistor network R2～R4, R1 be control ON/OFF end current-limiting resistance, (K1～K3 can be that temperature switch, limit switch, flow switch etc. detect limit for three limit K1, K2, K3, also can be relay, contacts of contactor, can also be logic level signal etc.) form.Wherein U1, D1, L1 constitute the reduction voltage circuit of a similar BUCK.When K1 was off-state, U1 did not work and does not have output voltage, direct current machine stall; When K1 closure and K2 closure, the operation of direct current machine Half Speed; When K1 closure and K3 closure, the direct current machine full speed running.Resistor network can be changed by the increase limit and level Four, Pyatyi uniform velocity can be realized.Serve as that the typical case uses generally with three step velocitys.
Fig. 3 has introduced DC fan three-step timing circuit theory diagrams of the present utility model.Constitute three grades of DC fan pressure-regulating and speed-regulating circuits by a slice switch mode voltage regulator LM2576HV-ADJ and peripheral circuit thereof and two temperature switches, also do not have such variable voltage control technical scheme both at home and abroad.
LM2576HVT-ADJ as shown in Figure 4, pin explanation: 1 pin (Vin): power supply 48VDC input; 2 pin (OUTPUT): the voltage output end after the adjusting; 3 pin (GND): ground; 4 pin (FEEDBACK): pressure feedback port; 5 pin: (ON/OFF): Enable Pin, ON is for enabling, whether the enabling of 5 pin of the State Control LM2576HV-ADJ by low temperature shelves temperature switch.Utilize the limit of two temperature switches to control the different output voltages of 2 pin of LM2576HV-ADJ, realize the DC fan speed governing by pressure regulation.
The peripheral circuit explanation: C1 is a LM2576HV-ADJ input filtering electric capacity 1; R5 is a current-limiting resistance, is high level when guaranteeing 5 pin for OFF; Constitute output filter circuit by D1, L1, C2, D1 is a Schottky diode, and C2 can not be too little, otherwise ripple is bigger; 4 pin voltage-regulation are made of limit K1﹠amp resistor network R2～R4; K2 is low temperature shelves two normal battle of temperature switches, and K3 is the high temperature shelves temperature switches of often making war.
The three-step timing function declaration: when the K1 disconnection, fan did not change when 5 pin were high level, for the zero velocity shelves, worked as K1﹠amp; K2 is the Half Speed shelves when closed, works as K1﹠amp; K3 constitutes full gear when closed.
4 pin of LM2576HV-ADJ feedback divider resistance: Half Speed, computing formula is as follows at full speed:
Annotate 1:1K≤R
1≤ 5K, R
2=R2 V
REF=1.23V, R during Half Speed
1=R3+R4, R during full speed running
1=R3.
In sum, utilize switch mode voltage regulator to realize that the advantage of DC motor speed-regulating circuit is as follows with progress:
1, variable voltage control: utilize the high efficiency switch mode voltage regulator of low pressure drop, pass through the contact Open and turn-off, make its 2 pin export the purpose that different voltages reach different rotation speeds of the fan, little The power DC machine field utilizes switch mode voltage regulator to realize the variable voltage control scheme at home and abroad Also not having, is an innovation.
2, conversion efficiency height, energy consumption is low: utilize switch mode voltage regulator to realize the direct current generator accent Press speed governing, its energy conversion efficiency reaches more than 90%, and load current reaches 3 amperes.
3, cost is low: utilize switch mode voltage regulator to realize the cost of DC motor speed-regulating circuit Low, utilize switch mode voltage regulator to control single DC motor speed-regulating, its cost only has 10 yuan About.
4, high reliability: whole speed-regulating control circuit does not have software, all is made up of hardware circuit.
5, highly versatile: can be widely used in the variable voltage control of direct current generator, DC fan, also Can be applicable in direct current light modulation, the direct current heat regulating system.
Claims (10)
1, a kind of dc motor drive, it is characterized in that, it comprises power supply, switch mode voltage regulator and peripheral circuit thereof and feedback voltage resistor network, described power supply provides the input voltage of described switch mode voltage regulator and peripheral circuit thereof, described switch mode voltage regulator and peripheral circuit thereof are controlled the dividing potential drop change in resistance of described feedback voltage resistor network, thereby regulate the output voltage of described feedback voltage resistor network, the rotating speed of the output voltage control direct current machine of described feedback voltage resistor network.
2, device according to claim 1 is characterized in that, described power supply output DC source voltage is to described switch mode voltage regulator and peripheral circuit thereof.
3, device according to claim 1, it is characterized in that, a plurality of limits are set in described switch mode voltage regulator and the peripheral circuit thereof,, the divider resistance resistance of described feedback voltage resistor network are changed regulate its output voltage by controlling the connecting and disconnecting of described limit.
4, device according to claim 3 is characterized in that, described switch mode voltage regulator and peripheral circuit thereof carry out filtering to input supply voltage and output voltage, and the control switch mode voltage regulator enables.
5, device according to claim 3 is characterized in that, described limit is set to temperature switch, limit switch or flow switch.
6, device according to claim 3 is characterized in that, described limit is set to relay or contacts of contactor.
7, device according to claim 3 is characterized in that, described limit is set to logic level signal.
8, according to the arbitrary described device of claim 1 to 7, it is characterized in that, described switch mode voltage regulator and peripheral circuit thereof comprise switch mode voltage regulator, the filter capacitor that links to each other with its voltage input end, the Schottky diode that links to each other with its voltage output end, the inductance that links to each other with its voltage output end, the filter capacitor that links to each other with described inductance, the current-limiting resistance that links to each other with its voltage input end, a plurality of divider resistances, a plurality of limits, the wherein said filter capacitor that links to each other with its voltage input end, the described Schottky diode that links to each other with its voltage output end, the described inductance that links to each other with its voltage output end, the other end of the filter capacitor that described and described inductance links to each other is connected to reference to the ground voltage end, the other end of described current-limiting resistance links to each other with the ON/OFF pin of described switch mode voltage regulator, limit one end in described a plurality of limit links to each other with the ON/OFF pin of described switch mode voltage regulator, its other end is connected to reference to the ground voltage end, an end links to each other with described inductance behind described a plurality of divider resistance and other limit serial or parallel connection, and the other end is connected to reference to the ground voltage end.
9, device according to claim 8 is characterized in that, the resistance of described feedback voltage resistor network is set to the 1/4W metalfilmresistor respectively.
10, device according to claim 9 is characterized in that, the quantity of described limit is set to 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2004200943290U CN2742674Y (en) | 2004-10-19 | 2004-10-19 | DC motor speed regulating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2004200943290U CN2742674Y (en) | 2004-10-19 | 2004-10-19 | DC motor speed regulating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2742674Y true CN2742674Y (en) | 2005-11-23 |
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ID=35478139
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2004200943290U Expired - Lifetime CN2742674Y (en) | 2004-10-19 | 2004-10-19 | DC motor speed regulating device |
Country Status (1)
| Country | Link |
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| CN (1) | CN2742674Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107590041A (en) * | 2017-09-30 | 2018-01-16 | 郑州云海信息技术有限公司 | A kind of voltage weighted feedback system of more feedback points |
-
2004
- 2004-10-19 CN CNU2004200943290U patent/CN2742674Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107590041A (en) * | 2017-09-30 | 2018-01-16 | 郑州云海信息技术有限公司 | A kind of voltage weighted feedback system of more feedback points |
| CN107590041B (en) * | 2017-09-30 | 2023-09-08 | 郑州云海信息技术有限公司 | Voltage weighted feedback system with multiple feedback points |
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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 | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20141019 Granted publication date: 20051123 |