CN102856898A - Constant active power control circuit of single phase alternating current fan and water pump - Google Patents
Constant active power control circuit of single phase alternating current fan and water pump Download PDFInfo
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- CN102856898A CN102856898A CN2011101824170A CN201110182417A CN102856898A CN 102856898 A CN102856898 A CN 102856898A CN 2011101824170 A CN2011101824170 A CN 2011101824170A CN 201110182417 A CN201110182417 A CN 201110182417A CN 102856898 A CN102856898 A CN 102856898A
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Abstract
Disclosed is a constant active power control circuit of a single phase alternating current fan and a water pump. The constant active power control circuit is applied to fields of products of gas wall-hanging stoves, gas water heaters, gas air heaters, biomass furnaces, solar energy hot water work stations, room air renewal systems (new air systems) and the like. The constant active power control circuit comprises a floating ground direct-current power supply, an alternating voltage zero-cross detection portion, an alternating voltage sampling and amplifying circuit, a motor current sampling and amplifying circuit, a motor driving circuit, a micro controller unit (MCU) and a serial communication separation circuit. The micro controller obtains a current target work power value of a fan or a water pump through serial communications and performs proportion integration differentiation (PID) algorithm control according to a current actual work power value of a motor to achieve the constant active power control of the single phase alternating current fan and the water pump, wherein the current actual work power value of the motor is obtained by sampling, amplifying and analog to digital (AD) sampling calculation. According to the constant active power control circuit, problems that the motor is influenced by network voltage fluctuation, the fan is influenced by changes of environmental air velocity such as velocity of adverse wind, and the water pump is influenced by changes of resistance in different water routes are solved.
Description
Technical field
The object of the invention is to carry out permanent active power control by single phase alternating current (A.C.) blower fan, water pump, realize under different operational environments, all can obtaining stable air quantity or the control circuit of the water yield.
Background technology
In control applications such as Home Heating (burnt gas wall hanging furnace, gas heater, gas-burning hot-blast machine, biomass stove, solar water work station) and chamber wind air air exchange systems, blower fan needs to produce under different operating mode loads stablizes air quantity accordingly, to reach completing combustion, improve the discharge standard of combustion efficiency and waste gas.Water pump is the hot water of the different water yields of circulation under different heat load demands then, the best power point when reaching heat balance.
Tradition uses burnt gas wall hanging furnace, gas heater, gas-burning hot-blast machine, biomass stove and the chamber wind air air exchange system etc. of AC blower fan, water pump mainly by control relay circuit control constant speed blower fan, water pump or speed step blower fan, water pump, or by the permanent rotating speed speed-regulating control circuit control of blower fan blower fan.
Above-mentioned traditional draught fan control circuit is (as against the wind) when exhaust environment changes, and the rotating speed that all can cause blower fan increases, and air quantity but descends, and causes combustion efficiency to descend the toxic emission severe overweight.Water pump is then in the operating voltage fluctuation, and the water route resistance can not cause quantity of circulating water variation, shakiness simultaneously.
Therefore be necessary to improve blower fan, water pump control circuit, its quantity combusted and air flow rate proportioning under various burning situations is realized constant control, it is fully burnt, improve the heat efficiency and the discharge standard of heating product.Adopt simultaneously independently MCU control, this control circuit links to each other with forceful electric power floatingly, has saved circuit cost.
Summary of the invention
The object of the invention is to by microcontroller (MCU) and peripheral circuit to operating voltage, the electric current of alternating current machine sample, amplification, analog-to-digital conversion, active power is calculated, electric moter voltage phase shift drive circuits etc. consist of the PID controller of closed loop, realize the permanent active power control of motor.Simultaneously the power supply of this controller adopted the processing method that links to each other with forceful electric power floatingly, this MCU carries out serial communication by low speed light-coupled isolation and main control MCU, has reduced cost.
For achieving the above object, technical scheme of the present invention is as follows:
A kind of single phase alternating current (A.C.) blower fan, the permanent active power control circuit of water pump: it includes resistance: R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, R13, R14, R15, R16, R17, R18, R19, R20, R21, R22, R23, R24, R25, R26, R27, R28, R29, R30, R31; Capacitor C 1, C2, C3, C4, C5, C6, C7, C8, C9, C10, C11, C12, C13, C14, C15, C16, C17; Diode D1, D2, D3, D4, piezo-resistance RV1; Insurance FS1; Transformer TR1; Three terminal regulator IC1; Main controller U1; Operational amplifier U2A, U2B, U2C; Optocoupler U3, U4; Bidirectional triode thyristor Q1, Q2.
Circuit is divided into the power supply part: by the transformer transformation, rectification also obtains direct current+5V power supply after the IC1 voltage stabilizing, for control circuit.
Alternating voltage zero-crossing detects part: obtain the alternating voltage zero-crossing signal
AC supply voltage detects part: ac supply signal is taken a sample, amplified, supply with the AD of MCU.
Blower fan current detecting part: by resistance sampling, amplify, supply with the AD of MCU.
Blower fan phase shift driving part: carry out phase shifting control by controllable silicon, realize the power adjustments of blower fan.
MCU serial communication part: by the photoelectricity isolation, MCU and master control MCU carry out serial communication, obtain the target power value of blower and water pump.
MCU closed loop PID control part: MCU carries out pid algorithm control by the target power value that provides of main control MCU with the performance number of the sampling of reality.
Water pump control circuit: identical with above-mentioned air-blower control.
Description of drawings
Single phase alternating current (A.C.) blower fan of the present invention, the permanent active power control circuit of water pump are provided by following embodiment and accompanying drawing.
Fig. 1 is traditional blower fan, water pump control circuit schematic diagram.
Fig. 2 is single phase alternating current (A.C.) blower fan of the present invention, the permanent active power control circuit of water pump schematic diagram.
Embodiment
Below will be described in further detail in conjunction with the embodiments single phase alternating current (A.C.) blower fan of the present invention, the permanent active power control circuit of water pump, its circuit theory diagrams as shown in Figure 2.
The choosing value that each device adopts is: the R1 resistance is 200 ± 1% ohm, the R2 resistance is 220K ± 1% ohm, the R3 resistance is 20K ± 1% ohm, the R4 resistance is 27K ± 1% ohm, the R5 resistance is 15K ± 1% ohm, the R6 resistance is 100K ± 1% ohm, the R7 resistance is 1K ohm, the R8 resistance is 200 ohm, the R9 resistance is 39 ohm, the R10 resistance is 0.47 ± 1% ohm, the R11 resistance is 27K ± 1% ohm, and the R12 resistance is 15K ± 1% ohm, and the R13 resistance is 20K ± 1% ohm, the R14 resistance is 100K ± 1% ohm, the R15 resistance is 1K ohm, and the R16 resistance is 200 ohm, and the R17 resistance is 39 ohm, the R18 resistance is 0.47 ± 1% ohm, the R19 resistance is 27K ± 1% ohm, and the R20 resistance is 15K ± 1% ohm, and the R21 resistance is 20K ± 1% ohm, the R22 resistance is 100K ± 1% ohm, the R23 resistance is 1K ohm, and the R24 resistance is 10K ohm, and the R25 resistance is 4K7 ohm, the R26 resistance is 1K ohm, the R27 resistance is 1K ohm, and the R28 resistance is 10K ohm, and the R29 resistance is 4K7 ohm, the R30 resistance is 470K ohm, and the R31 resistance is 10K ohm.The C1 model is 470 μ F/35V, and the C2 model is 100 μ F/16V, and C3, C5, C10, C15 model are 100nF/50V, C4, C9, C14 model are 10 μ F/16V, C6, C7, C11, C12, C16 model are 10nF/50V, and C8, C13 model are 0.01 μ F/275V, and the C17 model is 220nF/50V.D1, D2 model are 1N4007, and D3, D4 model are 1N4148, and the IC1 model is 79L05, and the U1 model is STM8S103, and U2A, U2B, U2C model are LM324, and U3, U4 model are PC817.Q1, the Q2 model is BTA08.
Power supply is made of RV1, FS1, TR1, D1, D2, C1, C2, C3, IC1 and exchanges input, transformation, rectification and voltage stabilizing circuit, obtains one and is connected to+the 5V DC power supply with forceful electric power N line.
Alternating voltage detects by R1, the sampling of R2 dividing potential drop, V voltage peak=VAC*R1/ (R1+R2)=220*1.4142*200/ (200+220000)=0.2826 (V), obtain ac voltage signal through C4 isolated DC composition, this signal and+5V, R4, R5, the 1.786V dc offset voltage that C5 consists of: 5V*R5/ (R4+R5)=5*15000/ (27000+15000)=1.786 (V), again through R3, R6, U2A proportion of composing amplifying circuit, β=R6/R3=100000/20000=5; Just obtain an ac voltage signal that changes around+1.786V for the AD sampling of MCU, VAD=1.786 ± β * V voltage peak=1.786 ± 5*0.2826=1.786 ± 1.413 (V). press voltage maximum fluctuation permissible range+20%, then VADMAX=1.786 ± (1+20%) * VAD=1.786 ± 1.20*1.413=1.786 ± 1.696 (V).
Alternating voltage zero-crossing detects and is comprised of R30, R31, C17, D3, D4.
The blower fan current detecting changes into ac voltage signal by sample resistance R10, V electric current MAX=I blower fan MAX*R10=0.7*0.47=0.329 (V), if the blower fan current value is larger, then the corresponding resistance that reduces sample resistance R10 then can.Obtain ac voltage signal through C9 isolated DC composition, this signal and+5V, R11, R12, G10 formation+1.786V dc offset voltage is then by R13, R14, the U2B proportion of composing amplifies, and β=R14/R13=100000/20000=5 just obtains one around the AD sampling for MCU of+ac voltage signal that 1.786V changes.VAD=1.786 ± β * V electric current MAX=1.786 ± 5*0.329=1.786 ± 1.645 (V).
Blower fan drives regulating circuit and through C7, R8 bidirectional triode thyristor Q1 is carried out II, III quadrant triggering control by the gate pole control signal of MCU output, and R9, C8 are rc protection circuit.
The power target value is obtained through optical coupling isolation circuit and the main controller communication of R24, R25, R26, R27, R28, R29, U3, U4 by the serial ports of MCU.
U1 (MCU) carries out pid algorithm control according to the power target value target power value that main controller is sent with the performance number of the sampling of reality, thereby realizes the permanent active power control of blower fan.
The permanent active power control mode of water pump is identical with the permanent active power control of above-mentioned blower fan.
Claims (6)
1. the permanent active power control circuit of single phase alternating current (A.C.) blower fan water pump is used for the product scopes such as burnt gas wall hanging furnace, gas heater, gas-burning hot-blast machine, biomass stove, solar water work station, chamber wind air air exchange system (VMC).It is characterized in that: comprise the transformation, rectification, the negative pressure voltage regulator circuit that link to each other with forceful electric power in this circuit; Alternating voltage zero-crossing testing circuit, electric current and voltage direct sample circuit; The MCU direct driving circuit of bidirectional triode thyristor.
2. the permanent active power control circuit of a kind of single phase alternating current (A.C.) blower fan water pump as claimed in claim 1, it is characterized in that: two groups of transformer tappings that link to each other with forceful electric power N line pass through C1, D1, the D2 rectification obtains+direct current of 12V.Obtain by negative pressure three terminal regulator IC1 again being connected to the N line+the floating ground DC power supply of 5V.
3. the permanent active power control circuit of a kind of single phase alternating current (A.C.) blower fan water pump as claimed in claim 1 is characterized in that: the alternating voltage of L line is through the R30 current limliting, and C17 is every directly, D3 and N (+5V), D4 realizes the alternating voltage zero-crossing detection with the clamp circuit on ground.
4. the permanent active power control circuit of a kind of single phase alternating current (A.C.) blower fan water pump as claimed in claim 1, it is characterized in that: R1, the alternating voltage of R2 dividing potential drop sampling through C4 every directly, by R4, the biasing dividing potential drop that R5 forms, with operational amplifier U2A, R3, the ac voltage signal that the R6 composition obtains setovering after amplifying.
5. the permanent active power control circuit of a kind of single phase alternating current (A.C.) blower fan water pump as claimed in claim 1, it is characterized in that: the alternating voltage that the blower fan operating current obtains through sample resistance R10 through C9 every directly, by R11, the biasing dividing potential drop that R12 forms, with operational amplifier U2B, R13, the blower fan work current signal that the R14 composition obtains setovering after amplifying.
6. the permanent active power control circuit of a kind of single phase alternating current (A.C.) blower fan water pump as claimed in claim 1, it is characterized in that: MCU carries out the triggering control of II, III quadrant to the gate pole of bidirectional triode thyristor Q1 by R8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101824170A CN102856898A (en) | 2011-06-30 | 2011-06-30 | Constant active power control circuit of single phase alternating current fan and water pump |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011101824170A CN102856898A (en) | 2011-06-30 | 2011-06-30 | Constant active power control circuit of single phase alternating current fan and water pump |
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| CN102856898A true CN102856898A (en) | 2013-01-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011101824170A Pending CN102856898A (en) | 2011-06-30 | 2011-06-30 | Constant active power control circuit of single phase alternating current fan and water pump |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104729101A (en) * | 2015-01-26 | 2015-06-24 | 艾欧史密斯(中国)热水器有限公司 | Combustion control system for gas water heater or wall-hanging stove and control method thereof |
| CN108006991A (en) * | 2017-12-19 | 2018-05-08 | 成都前锋电子有限责任公司 | A kind of gas instantaneous water heater permanent wind amount control system |
Citations (4)
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| US5214311A (en) * | 1990-07-16 | 1993-05-25 | Fujitsu Limited | Power supply device |
| CN201177768Y (en) * | 2007-12-19 | 2009-01-07 | 白勇 | Thermostatic control apparatus for electric water heater |
| CN201608514U (en) * | 2009-12-25 | 2010-10-13 | 天津诺尔哈顿电器制造有限公司 | Overcurrent protection circuit used for insulating gate bipolar transistor |
| CN102072171A (en) * | 2009-11-23 | 2011-05-25 | 哈尔滨九洲电气股份有限公司 | Controller of water pump soft startup device |
-
2011
- 2011-06-30 CN CN2011101824170A patent/CN102856898A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5214311A (en) * | 1990-07-16 | 1993-05-25 | Fujitsu Limited | Power supply device |
| CN201177768Y (en) * | 2007-12-19 | 2009-01-07 | 白勇 | Thermostatic control apparatus for electric water heater |
| CN102072171A (en) * | 2009-11-23 | 2011-05-25 | 哈尔滨九洲电气股份有限公司 | Controller of water pump soft startup device |
| CN201608514U (en) * | 2009-12-25 | 2010-10-13 | 天津诺尔哈顿电器制造有限公司 | Overcurrent protection circuit used for insulating gate bipolar transistor |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104729101A (en) * | 2015-01-26 | 2015-06-24 | 艾欧史密斯(中国)热水器有限公司 | Combustion control system for gas water heater or wall-hanging stove and control method thereof |
| CN104729101B (en) * | 2015-01-26 | 2017-06-30 | 艾欧史密斯(中国)热水器有限公司 | Gas heater or wall-hung boiler combustion control system and its control method |
| CN108006991A (en) * | 2017-12-19 | 2018-05-08 | 成都前锋电子有限责任公司 | A kind of gas instantaneous water heater permanent wind amount control system |
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Application publication date: 20130102 |