CN202111650U - Multifunctional speed-regulating and dimming PWM (Pulse-Width Modulation) controller - Google Patents
Multifunctional speed-regulating and dimming PWM (Pulse-Width Modulation) controller Download PDFInfo
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- CN202111650U CN202111650U CN2011201084449U CN201120108444U CN202111650U CN 202111650 U CN202111650 U CN 202111650U CN 2011201084449 U CN2011201084449 U CN 2011201084449U CN 201120108444 U CN201120108444 U CN 201120108444U CN 202111650 U CN202111650 U CN 202111650U
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Abstract
The utility model discloses a multifunctional speed-regulating and dimming PWM (Pulse-Width Modulation) controller. The multifunctional speed-regulating and dimming PWM controller comprises a modulation wave generating circuit, a carrier wave generating circuit, a modulation circuit and a power push-pull amplifying circuit, wherein the modulation wave generating circuit is used for decoupling an inputted low-frequency PWM signal to be a stable DC (Direct Current) electric level signal; the carrier wave generating circuit is used for outputting a PWM control signal; the modulation circuit is used for receiving output signals from the modulation wave generating circuit and the carrier wave generating circuit respectively and outputting a PWM signal, and the PWM signal outputted by the modulation circuit changes in an anti-linear manner as the inputted low-frequency PWM signal changes; and the power push-pull amplifying circuit is used for amplifying the PWM signal outputted from the modulation circuit. The multifunctional speed-regulating and dimming PWM controller disclosed by the utility model has the advantages of simple structure and low cost, has an automatic mode and a manual mode and can be used for realizing stepless modulation.
Description
Technical field
The utility model relates to direct current machine PWM speed regulating control and light PWM brightness adjustment control, is specifically related to a kind of multifunctional speed control light modulation PWM controller of stepless modulation.
Background technology
The control of air blast at present mainly can be divided into relay speed regulating control, linear speed regulation control and three kinds of schemes of PWM speed regulating control.
Relay speed regulating control scheme is as shown in Figure 1.Make motor operate in high, medium and low three kinds of running statuses through three relays of switching controls respectively in this controlling schemes, obviously just plant the mechanical governing scheme, can not realize stepless time adjustment.
The linear speed regulation scheme is as shown in Figure 2, and this controlling schemes is used traditional linear current/voltage-regulation means, through changing the voltage on the linear potentiometer part, removes to control the rotating speed of air blast.Linear sectional pressure element can be mechanical resistance, power transistor and FET.Though this controlling schemes can realize the stepless speed regulation of air blast; But has only when fan turns round (passive component or in zero-speed, close fully under zero-speed or full-speed state; Complete opening in full speed) all power just can be transferred on the fan; But, just the part power dissipation will be arranged in the passive component, so the efficient of this method is doubtful when fan not in zero-speed or at full speed the time.
The PWM speed-regulating scheme is as shown in Figure 3, and this scheme has overcome the heat dissipation problems of linear speed regulation, and it according to integrating effect, just can change the voltage that is added in the MOSFET two ends through regulating the duty ratio of drive signal, thus the speed of control air blast.The PWM controlling schemes of present most of manufacturer mainly adopts the scheme of customization ASIC and MCU, and ASIC solution integration degree is high, and the control peripheral circuit is simple; But also do not have general integrated chip at present, generally customize services need be provided, have only big semiconductor production producer of minority semiconductor such as ON, ST just this type service can be provided; And the customization cost is expensive; Cycle is long, and function is unique, is unfavorable for the Products Development improvement; The MCU scheme adopts the intelligent control of numerical software, and is powerful, is very suitable for Products Development and improves, but linear stabilized power supply and comparatively complicated peripheral circuit need be provided, and cost is higher, and needs software programming, has increased the difficulty of product development.
Summary of the invention
To above-mentioned technical problem, the utility model provides the multifunctional speed control light modulation PWM controller that a kind of circuit structure is simple, cost is low and can realize stepless modulation.
The technical scheme that realizes the utility model purpose is following:
Multifunctional speed control light modulation PWM controller,
Comprise the modulating wave generative circuit, this modulating wave generative circuit becomes galvanic current to put down signal the low frequency pwm signal decoupling zero of input;
And carrier generation circuit, this carrier generation circuit is used to export pwm control signal;
And modulation circuit, this modulation circuit receives the output signal that comes from modulating wave generative circuit and carrier generation circuit respectively, and exports a pwm signal, and the low frequency pwm signal that the pwm signal of this modulation circuit output is followed input becomes antilinear to change;
And the power push-pull amplifier circuit, the pwm signal that this power push-pull amplifier circuit will come from modulation circuit output amplifies.
A pwm signal diverter switch was arranged before the power push-pull amplifier circuit.
When diverter switch switches to its 1st end, work in manual mode, thereby and realize speed governing or light fixture light modulation purpose direct current machine through the PWM duty ratio that the resistance that changes second resistance R 2 changes output.
When diverter switch is switched its 3rd end, work in automatic mode, this moment, variable second resistance R, 2 resistances were fixed, and the low frequency pwm signal that the duty ratio of output PWM is followed input changes and changes, thereby reaches the purpose of automatic speed regulation light modulation.
Also comprise a protection actuating circuit that is used to detect the loaded work piece situation, also comprise a protection actuating circuit that is used to detect the loaded work piece situation, this protection actuating circuit is connected with carrier generation circuit.。
Said modulating wave generative circuit comprises the termination receipts low frequency pwm signal of the 6th resistance R 6 and the 3rd capacitor C 3, the six resistance R 6, and the other end of the 6th resistance R 6 is connected with the 3rd capacitor C 3, the other end ground connection of the 3rd capacitor C 3.
Said carrier generation circuit comprises 555 timers, the first diode D1, the second diode D2, second resistance R 2, the 3rd resistance R 3, first capacitor C 1 and second capacitor C 2; One end of second resistance R 2 connects power supply, and the other end of second resistance R 2 connects the anode of the first diode D1, and the negative electrode of the first diode D1 connects an end of second capacitor C 2, the other end ground connection of second capacitor C 2; The anode of the second diode D2 is connected with an end of second capacitor C 2, and the negative electrode of the second diode D2 is connected with an end of the 3rd resistance R 3, and the other end of the 3rd resistance R 3 is connected with the discharge pin of 555 timers.
Also comprise the protection actuating circuit that is connected with the reset pin of 555 timers, when protection took place, the action of 555 timer reset functions made the pwm signal of output close.
Said modulation circuit is a comparator.
Said power push-pull amplifier circuit comprises the first triode Q1; The second triode Q2; The base stage of the 4th resistance R 4 and the 5th resistance R 5, the first triode Q1 connects the base stage of the second triode Q2, and the collector electrode of the first triode Q1 connects power supply; The two ends of the 4th resistance R 4 are connected with collector electrode and the emitter of the first triode Q1 respectively, and the two ends of the 5th resistance R 5 are connected with collector electrode and the emitter of the second triode Q2 respectively.
Adopted such scheme; The utlity model has automatic and two kinds of manual speed regulating control patterns; Entire circuit is made up of several simple functional units; Entire circuit has only one 1 tunnel amplifier, 1 555 timer, 1 diverter switch, 2 diodes, 2 triodes, 3 electric capacity and 6 resistance to form, so its circuit structure is comparatively simple, and cost is also very low.Effect through modulating wave generative circuit, carrier generation circuit and modulation circuit has generated pwm signal that need be initial, and this signal can carry out stepless regulated to load after the overpower push-pull amplifier circuit amplifies.
Below in conjunction with accompanying drawing and embodiment the utility model is further described.
Description of drawings
Fig. 1 is the structural representation of prior art repeat circuit speed regulating control;
Fig. 2 is the sketch map of prior art neutral line speed-regulating scheme;
Fig. 3 is the sketch map of PWM speed-regulating scheme in the prior art;
Fig. 4 is the basic controlling block diagram of the multifunctional speed control light modulation PWM controller of the utility model;
Fig. 5 is the circuit theory diagrams of multifunctional speed control light modulation PWM controller;
In the accompanying drawing, 10 is the modulating wave generative circuit, and 20 is carrier generation circuit, and 30 is modulation circuit, and 40 is the power push-pull amplifier circuit, and 50 is diverter switch, and 60 are the protection actuating circuit.
Embodiment
Be that example is carried out detailed explanation to the utility model with air blast (load) below:
Can find out that from air blast basic controlling block diagram shown in Figure 4 this speed regulating control can be divided into input signal, drive controlling, three parts of direct current machine, controlled target is to produce the corresponding driving control signal according to input signal, through the voltage V at control switch two ends
SwitchRemove to control the voltage V at direct current machine two ends
MotorThereby, reach the purpose of controlling dc motor speed.Input signal generally is divided into the PWM wind speed output signal that the wind speed regulating command of HVAC control panel and ECU send.For the utility model; The concrete circuit of this PWM controller adopts single power supply; On operation principle, can it be divided into modulating wave generative circuit 10, carrier generation circuit 20, modulation circuit 30, power push-pull amplifier circuit 40, diverter switch 50,60 6 parts of protection actuating circuit, respectively this six part be elaborated below.
With reference to Fig. 5, modulating wave generative circuit 10 comprises the termination receipts low frequency pwm signal of the 6th resistance R 6 and the 3rd capacitor C 3, the six resistance R 6, and the other end of the 6th resistance R 6 is connected with the 3rd capacitor C 3, the other end ground connection of the 3rd capacitor C 3.Constituted a single order RC filter through the 6th resistance R 6 and the 3rd capacitor C 3, thereby the low frequency pwm signal decoupling zero of input is become the galvanic current signal, this dc signal amplitude Am is by input signal duty ratio D
InAnd level A
InDetermine as follows:
A
m＝A
in·D
in
With reference to Fig. 5, carrier generation circuit 20 is used to export pwm control signal.Carrier generation circuit comprises 555 timers, the first diode D1, the second diode D2, second resistance R 2, the 3rd resistance R 3, first capacitor C 1 and second capacitor C 2.One end of second resistance R 2 connects power supply; The other end of second resistance R 2 connects the anode of the first diode D1; The negative electrode of the first diode D1 connects an end of second capacitor C 2; The other end ground connection of second capacitor C 2, second resistance R 2 and the first diode D1 have constituted charging circuit to second capacitor C 2.The anode of the second diode D2 is connected with an end of second capacitor C 2; The negative electrode of the second diode D2 is connected with an end of the 3rd resistance R 3; The other end of the 3rd resistance R 3 is connected with the discharge pin 7 of 555 timers, and the second diode D2 and 3 pairs second capacitor C 2 of the 3rd resistance R have constituted discharge circuit.The low triggering pin 2 of 555 timers and the high pin 6 that triggers all are connected with modulation circuit 30.
The course of work of carrier generation circuit 20 is: give second capacitor C 2 chargings through second resistance R 2 and the first diode D1; Give second capacitor C 2 discharges through the 3rd resistance R 3 and the second diode D2, thereby discharge and recharge waveform, carrier frequency f what the low triggering pin 2 of 555 timers or high triggered that pin 6 produces vibration
CarrierBy second resistance R 2, the 3rd R3 and 2 decisions of second capacitor C:
555 timer output pins, 3 output frequencies are f
CarrierPwm control signal, its duty ratio D
555Determine as follows:
With reference to Fig. 5; Modulation circuit 30 is a comparator; Receive the output signal that comes from modulating wave generative circuit and carrier generation circuit respectively; The in-phase input end of modulation circuit 30 is connected with modulating wave generative circuit 10, and the reverse input end of modulation circuit 30 is connected with the low triggering pin 2 and the high pin 6 that triggers of 555 timers of carrier generation circuit 20.Producing a frequency during modulation circuit 30 work is f
CarrierPwm signal, its duty ratio is with the amplitude A of modulating wave
mLinear variation, thus the pwm signal that makes the pwm signal of output follow input becomes antilinear to change.If make output pwm signal become linear positive to change with the input pwm signal, as long as will hold modulating wave in the same way, reverse termination is carried ripple and is got final product.
With reference to Fig. 5, the pwm signal that power push-pull amplifier circuit 40 will come from the output of modulation circuit amplifies, and makes reliable conducting of power MOSFET tube and shutoff.Power push-pull amplifier circuit 40 comprises the first triode Q1, the second triode Q2, the 4th resistance R 4 and the 5th resistance R 5.The first triode Q1 is the triode of NPN type, and the base stage of the first triode Q1 connects the base stage of the second triode Q2, and the collector electrode of the first triode Q1 connects power supply, and the two ends of the 4th resistance R 4 are connected with collector electrode and the emitter of the first triode Q1 respectively.The second triode Q2 is the triode of positive-negative-positive, and the two ends of the 5th resistance R 5 are connected with collector electrode and the emitter of the second triode Q2 respectively.
With reference to Fig. 5, diverter switch 50 is connected between modulation circuit 30 and the power push-pull amplifier circuit 40, and diverter switch 50 is the diverter switch of a single-pole double throw.Diverter switch 50 is used for switching the control mode of air blast speed governing; If diverter switch 50 is thrown in the 1st end; Then controller works in the manual governing pattern; Just can change the duty ratio of 555 timer output pins, 3 end output pwm signals through the resistance that changes variable second resistance R 2, thereby reach the wind speed of regulating air blast.If diverter switch 50 throws in the 3rd end, controller work automatic speed regulation pattern then, it is through the decoupling zero to ECU input PWM, and the pwm signal that produces through modulation circuit is controlled the wind speed of air blast.
With reference to Fig. 5, the protection actuating circuit 60 that is used to detect the loaded work piece situation is connected with carrier generation circuit, wherein detects the loaded work piece situation and comprises the situation such as motor rotation blockage, overcurrent, system's excess temperature, supply voltage be unusual that detect.Protection actuating circuit 60 is connected with the reset pin of 555 timers, and protection actuating circuit 60 also connects power supply VCC through pull-up resistor R1.Protection actuating circuit 60 mainly is a RESET function of utilizing the pin 4 of 555 timers; If detect situation such as motor rotation blockage, overcurrent, system's excess temperature, supply voltage be unusual, then export a low level to 555 timers, 555 timers reset; Thereby forbid exporting the PWM waveform, the air blast stall; When system works is normal, RESET end is through pull-up resistor R1,555 circuit operate as normal, and controller carries out speed governing according to the pattern of setting to air blast.
Below from automatically describing with the course of work of manual two kinds of patterns to the utility model:
When diverter switch 50 is thrown in the 3rd end, be automatic operation mode, the signal on the output pin 3 of 555 timers is cut off.Modulation circuit 30 receives the output signal that comes from modulating wave generative circuit and carrier generation circuit respectively; After these two signals are handled; The low frequency pwm signal that the duty ratio of output pwm signal is followed input changes and changes; Pwm signal to the power push-pull amplifier circuit 40 of output, power push-pull amplifier circuit 40 output to the MOSFET pipe after this pwm signal is amplified, with the voltage V at control direct current machine two ends
MotorThereby, reach the wind speed of regulating air blast.
When diverter switch 50 is thrown in the 1st end, be manual work pattern, the pwm signal of modulation circuit 30 outputs at this moment is cut off.Through changing the resistance of variable second resistance R 2, changing the duty ratio of 555 timer output pins, 3 end output pwm signals, thereby reach the wind speed of regulating air blast.
If load is changed to light fixture, can carry out light modulation to light fixture.Certainly; Those skilled in the art in the present technique field will be appreciated that; Above-mentioned embodiment and embodiment are used for explaining the utility model; And be not with the qualification of doing the utility model, as long as in the connotation scope of the utility model claim, all will drop in the scope of the utility model claim variation, the modification of the foregoing description.
Claims (8)
1. multifunctional speed control light modulation PWM controller is characterized in that:
Comprise the modulating wave generative circuit, this modulating wave generative circuit becomes galvanic current to put down signal the low frequency pwm signal decoupling zero of input;
And carrier generation circuit, this carrier generation circuit is used to export pwm control signal;
And modulation circuit, this modulation circuit receives the output signal that comes from modulating wave generative circuit and carrier generation circuit respectively, and exports a pwm signal, and the low frequency pwm signal that the pwm signal of this modulation circuit output is followed input becomes antilinear to change;
And the power push-pull amplifier circuit, the pwm signal that this power push-pull amplifier circuit will come from modulation circuit output amplifies.
2. multifunctional speed control light modulation PWM controller according to claim 1 is characterized in that: before the power push-pull amplifier circuit, be provided with a pwm signal diverter switch.
3. according to any described multifunctional speed control light modulation PWM controller of claim 1 to 2, it is characterized in that: also comprise a protection actuating circuit that is used to detect the loaded work piece situation, this protection actuating circuit is connected with carrier generation circuit.
4. according to any any described multifunctional speed control light modulation PWM controller of claim 1 to 2; It is characterized in that: said modulating wave generative circuit comprises the 6th resistance R 6 and the 3rd capacitor C 3; One termination of the 6th resistance R 6 is received the low frequency pwm signal; The other end of the 6th resistance R 6 is connected with the 3rd capacitor C 3, the other end ground connection of the 3rd capacitor C 3.
5. according to any described multifunctional speed control light modulation PWM controller of claim 1 to 2, it is characterized in that: said carrier generation circuit comprises 555 timers, the first diode D1, the second diode D2, second resistance R 2, the 3rd resistance R 3, first capacitor C 1 and second capacitor C 2; One end of second resistance R 2 connects power supply, and the other end of second resistance R 2 connects the anode of the first diode D1, and the negative electrode of the first diode D1 connects an end of second capacitor C 2, the other end ground connection of second capacitor C 2; The anode of the second diode D2 is connected with an end of second capacitor C 2, and the negative electrode of the second diode D2 is connected with an end of the 3rd resistance R 3, and the other end of the 3rd resistance R 3 is connected with the discharge pin of 555 timers.
6. multifunctional speed control light modulation PWM controller according to claim 5; It is characterized in that: also comprise the protection actuating circuit that is connected with the reset pin of 555 timers; When protection took place, the action of 555 timer reset functions made the pwm signal of output close.
7. according to any described multifunctional speed control light modulation PWM controller of claim 1 to 2, it is characterized in that: said modulation circuit is a comparator.
8. according to any described multifunctional speed control light modulation PWM controller of claim 1 to 2; It is characterized in that: said power push-pull amplifier circuit comprises the first triode Q1; The second triode Q2; The base stage of the 4th resistance R 4 and the 5th resistance R 5, the first triode Q1 connects the base stage of the second triode Q2, and the collector electrode of the first triode Q1 connects power supply; The two ends of the 4th resistance R 4 are connected with collector electrode and the emitter of the first triode Q1 respectively, and the two ends of the 5th resistance R 5 are connected with collector electrode and the emitter of the second triode Q2 respectively.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201084449U CN202111650U (en) | 2011-04-14 | 2011-04-14 | Multifunctional speed-regulating and dimming PWM (Pulse-Width Modulation) controller |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011201084449U CN202111650U (en) | 2011-04-14 | 2011-04-14 | Multifunctional speed-regulating and dimming PWM (Pulse-Width Modulation) controller |
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| CN202111650U true CN202111650U (en) | 2012-01-11 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102185549A (en) * | 2011-04-14 | 2011-09-14 | 江苏浩峰汽车附件有限公司 | Multifunctional speed-regulation and light-modulation PWM (Pulse-Width Modulation) controller |
| WO2018024221A1 (en) * | 2016-08-02 | 2018-02-08 | 欧普照明股份有限公司 | Timer-based protection circuit and lamp |
| CN112187140A (en) * | 2020-09-29 | 2021-01-05 | 浙江工业职业技术学院 | Motor control circuit |
-
2011
- 2011-04-14 CN CN2011201084449U patent/CN202111650U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102185549A (en) * | 2011-04-14 | 2011-09-14 | 江苏浩峰汽车附件有限公司 | Multifunctional speed-regulation and light-modulation PWM (Pulse-Width Modulation) controller |
| WO2018024221A1 (en) * | 2016-08-02 | 2018-02-08 | 欧普照明股份有限公司 | Timer-based protection circuit and lamp |
| US11240888B2 (en) | 2016-08-02 | 2022-02-01 | Opple Lighting Co., Ltd. | Timer based protection circuit and lighting device |
| CN112187140A (en) * | 2020-09-29 | 2021-01-05 | 浙江工业职业技术学院 | Motor control circuit |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120111 Effective date of abandoning: 20120620 |