CN103994089A - Random variable wind fan and random variable wind generation method - Google Patents
Random variable wind fan and random variable wind generation method Download PDFInfo
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- CN103994089A CN103994089A CN201410217968.XA CN201410217968A CN103994089A CN 103994089 A CN103994089 A CN 103994089A CN 201410217968 A CN201410217968 A CN 201410217968A CN 103994089 A CN103994089 A CN 103994089A
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Abstract
The invention discloses a random variable wind fan which comprises a high-frequency oscillating circuit, an air speed data generation circuit, a variable speed pulse generation circuit, a D/A conversion circuit, a variable-speed speed control circuit, a random air speed upper limit adjusting circuit, a random air speed lower limit adjusting circuit, a power amplifying circuit, a direct-current power supply circuit, a magnetic saturation controllable reactor and a single-phase asynchronous motor. Meanwhile, the invention further discloses a random variable wind generation method. Air speed data signals which are changed periodically at a high speed are sampled and stored in a random mode by means of low-frequency variable speed pulses, and the fan speed is controlled through D/A conversion and power amplification. The magnitude of reference input voltage of the D/A conversion circuit is adjusted to change the maximum random variable air speed value. The relative fluctuation range of the random variable air speed is changed by adjusting the minimum value of the air speed data signals which are changed periodically at the high speed. The whole control circuit is not provided with a program control device, and interference resistance is strong. The fan is easy to operate, and a stepless speed adjusting function can be achieved.
Description
Technical field
The present invention relates to a kind of fan, especially a kind of random variable wind fan and random variable wind production method.
Background technique
The conventional fan using in indoor environment at present only has simple stepping speed-regulating function, and mode dullness is larger with Difference of physical environment, and blowing impression is poor, the long-time uncomfortable sensation of blowing that easily produces; There is automatic adjustment with the fan of control function or only by built-in curvilinear motion, or only control according to the variation of temperature, can not meet many-sided demand.
The patent " electronic timing electric fan simulating natural wind control gear " of application number 91211765.6, the patent " natural wind simulating controller " of application number 90209401.7, the patent " natural wind simulating controller for fan " of application number 91214603.6, adopt simple electronic circuit control wind speed size and time, controlling motor rotary speed by silicon-controlled voltage regulation mode of speed regulation changes, just realize the elementary simulation of natural wind, had very big difference with real natural wind; Silicon-controlled voltage regulation mode speed governing, can make the distortion of electrical network sine waveform, brings larger electromagnetic interference simultaneously.
The patent " simulation natural wind controller for electric fan " of application number 201220070500.9 with electronic circuit control fan time stop while turning, can only form fitful wind, have gap with real natural wind.
The patent " a kind of energy saving control circuit device being applied on electric fan " of application number 200920050741.5, its natural wind function realizes by program mode, only has 9 grades of fixing selections.
The patent " a kind of electric fan with turbulent natural wind " of application number 201020668439.9 and the patent of application number 97116771. 0 " forming method and the electric fan of natural wind of natural wind ", realize a kind of disorderly natural wind by structure, and usage mode is restricted.
The patent " controlling method of the comfortable wind of a kind of fan " of application number 201210086869.3, sets operating mode and wind speed size, mode of operation complexity by gear mode; The rate setting that fan speed changes is at the uniform velocity rising or uniform descent, with random changeable not the meeting of actual natural wind; Adopt DC brushless motor cost high, difficult in maintenance, need to coordinate speed governing with frequency variator.
The patent " a kind of terminal dynamic air of blow of individuation air conditioning system " of application number 200510086921.5 is passed through natural wind, sinusoidal wind, pulse wind, the dynamic wind sample wind velocity signal of RANDOM WIND air-flow is stored in storage, single-chip microcomputer reads sample wind velocity signal, through voltage amplifier circuit or frequency changer circuit control direct current brushless motor speed, the natural wind producing is only relevant to the sample wind velocity signal in be stored in storage, because sample size is limited, the effect of natural wind must be periodic repetition, user cannot need to change wind speed size and wave range according to self.
The patent " a kind of apparatus and method of natural wind simulating " of application number 200810185769.X, with the multiple natural wind wind speed of memory stores sample signal, with random fashion select a sample signal control, because sample size is limited, the effect of natural wind is difficult to avoid periodic repetition equally; Adopt closed loop control can improve the precision of speed governing, but automatic control system add the stability decreases that also makes device work, probability of malfunction improves; Adopt DC brushless motor cost high, difficult in maintenance, need to coordinate speed governing with frequency variator; Meanwhile, user also cannot need to change wind speed size and wave range according to self.
The patent " a kind of device based on chaology natural wind simulating " of application number 201010276923.1, the chaology based on real realizes natural wind, and natural wind is effective, but whole system complexity, cost is high, is not suitable for applying on conventional fan.
The patent " fan of natural wind simulating and method " of application number 201310191716.X, adopts SCM program to realize the simulation of natural wind, and the analogy method of natural wind is flexible, but single-chip microcomputer is easily interfered, and causes the deadlock, out of control of fan running.
Summary of the invention
The object of the invention is for fan provides a kind of solution that produces random variable wind, improve blowing person's comfort.
To achieve these goals, one aspect of the present invention provides a kind of random variable wind fan, is made up of high-frequency oscillating circuits, air speed data generation circuit, speed change pulse-generating circuit, D/A change-over circuit, speed change speed control circuit, random wind speed upper limit regulating circuit, random wind speed lower limit regulating circuit, power amplification circuit and DC power supply circuit, magnetically controlled saturated reactor, single-phase asynchronous motor.
Described single-phase asynchronous motor is connected to ac power supply after connecting with the Working winding of magnetically controlled saturated reactor.
The control winding of described magnetically controlled saturated reactor is connected to the voltage output end of power amplification circuit.
It is automatic pre-set initial value counter that described air speed data produces circuit.
The count pulse input end of described automatic pre-set initial value counter is connected to the high frequency oscillation pulse of high-frequency oscillating circuits output, and preset end is connected to limited signal under the air speed data of random wind speed lower limit regulating circuit output.
Described D/A change-over circuit is made up of the first D/A converter, the output voltage of the first D/A converter is connected to the input end of power amplification circuit, data input pin is connected to the terminal count output of automatic pre-set initial value counter successively, reference voltage input terminal is connected to the maximum wind speed control signal of random wind speed upper limit regulating circuit output, and data latch control end is connected to the low frequency speed change pulse of speed change pulse-generating circuit output.
Described speed change pulse-generating circuit is voltage controlled oscillator.
The voltage control signal of described voltage controlled oscillator is connected to the speed change speed control voltage of speed change speed control circuit output.
Described DC electrical source comprises the first DC electrical source and the second DC electrical source; Described the first DC electrical source and the second DC electrical source are all made up of transformer pressure-reducing, rectifier bridge rectification and capacitor filter.
Described power amplification circuit adopts controlled pulse-width modulation circuit, is made up of voltage-controlled type pulse width modulator, the first resistance, the second resistance, triode, diode; The oscillation frequency that the first resistance two ends are connected to respectively voltage-controlled type pulse width modulator arranges end and publicly; The frequency dividing control end of voltage-controlled type pulse width modulator is connected to publicly; The second resistance two ends are connected to respectively the pwm pulse output terminal of voltage-controlled type pulse width modulator and the base stage of triode; The emitter of triode is connected to publicly; The negative electrode of diode is connected to the second DC electrical source, the anodic bonding collector electrode to triode; The control winding parallel of magnetically controlled saturated reactor is at diode two ends; The input end that the pulse width modulation controlled end of voltage-controlled type pulse width modulator is described power amplification circuit.Described voltage-controlled type pulse width modulator is selected silicon oscillator LTC6692-4.
Described high-frequency oscillating circuits is made up of oscillator, the 3rd resistance; The oscillation frequency that the 3rd resistance two ends are connected to respectively oscillator arranges end and publicly; The frequency dividing control end of oscillator is connected to publicly; High frequency oscillation pulse is from the pulse output end output of oscillator; Oscillator is selected silicon oscillator LTC6690.
Described automatic pre-set initial value counter is made up of the first counter, the second counter, the first phase inverter; The first counter and the second counter 402 are all selected can preset coincidence counter 74HC161; The first counter and the second counter adopt 8 binary addition counters of standard mode cascade composition, and the first counter is low 4; The input end of the first phase inverter is connected to the carry output terminal of the second counter, and output terminal is connected to the synchronous preset end of the first counter and the second counter.
Described voltage controlled oscillator is made up of the one 555 time base apparatus part, the 4th resistance, the 5th resistance, the first electric capacity.
Described random wind speed upper limit regulating circuit is made up of the first amplifier, the 6th resistance, the 7th resistance, the 8th resistance, voltage-stabiliser tube, the first potentiometer; The 6th resistance, voltage-stabiliser tube composition mu balanced circuit, the 7th resistance, the first potentiometer, the 8th resistor group become voltage divider; Voltage divider is by the follower output maximum wind speed control signal of the first amplifier composition.
Described random wind speed lower limit regulating circuit is made up of A/D converter, the second potentiometer, the 9th resistance; The output voltage of the voltage divider of the second potentiometer, the 9th resistance composition is connected to the analog voltage input of A/D converter; The startup conversion input end of A/D converter is connected to the pulse of low frequency speed change, and output control terminal is connected to publicly, limited signal under data output end output air speed data.The model of described A/D converter is ADC0841.
Described speed change speed control circuit is made up of the 3rd counter, four-counter, the second phase inverter, the 2 555 time base apparatus part, the tenth resistance, the 11 resistance, the second electric capacity, the second D/A converter, the second amplifier; The 3rd counter, four-counter are selected can preset coincidence counter 74HC161; The 3rd counter and four-counter adopt 8 binary addition counters of standard mode cascade composition, and the 3rd counter is low 4; The input end of the second phase inverter is connected to the carry output terminal of four-counter, and output terminal is connected to the synchronous preset end of the 3rd counter and four-counter; The count pulse of the 3rd counter, four-counter is connected to high frequency oscillation pulse, and 8 signals of terminal count output output are connected to the data input pin of the second D/A converter successively; The 2 555 time base apparatus part, the tenth resistance, the 11 resistance, the second electric capacity composition Low Frequency Oscillator, low frequency oscillation pulse, from the output terminal output of the 2 555 time base apparatus part, is connected to the data latch control end of the second D/A converter; The changing voltage output terminal of the second D/A converter is connected to the follower input end of the second amplifier composition; Speed change speed control voltage is from the output terminal output of the second amplifier.
The model of described the first D/A converter and the second D/A converter is 8 imported AD53308 of parallel connection.
The present invention provides a kind of random variable wind production method that utilizes random variable wind fan noted earlier on the other hand, comprising:
A, power amplification circuit are output as the control winding VDC of magnetically controlled saturated reactor, and fan speed is by the wind speed control Control of Voltage that is applied to power amplification circuit input end;
B, wind speed control voltage are exported from D/A change-over circuit;
C, regulate the reference input voltage size of D/A change-over circuit, can regulate the wind speed maximum value of random variable wind;
The periodically variable air speed data signal of high speed that the data input pin input minimum value of D, D/A change-over circuit can be set;
E, air speed data signal by automatic pre-set initial value counter to high frequency oscillation pulse count generation;
F, change the preset initial value of automatic pre-set initial value counter, can regulate the wind speed minimum value of random variable wind;
The data latch control end access low frequency speed change pulse of G, D/A change-over circuit;
H, the pulse of low frequency speed change are produced by voltage controlled oscillator;
The voltage control signal of I, voltage controlled oscillator is the speed change speed control voltage of change at random.
Compared with prior art, its beneficial effect is in the present invention: use common single-phase asynchronous motor speed governing, only need change the speed governing inductance of conventional fan into magnetically controlled saturated reactor; Whole circuit is not containing program control device, and antijamming capability is strong; Maximum wind speed and the wind speed relative fluctuation range of random variable wind can regulate setting, and setting means is simple, easily operation; Fan can be realized function of stepless speed regulation.
Brief description of the drawings
Fig. 1 is structural representation of the present invention.
Fig. 2 is power amplification circuit embodiment of the present invention.
Fig. 3 is D/A change-over circuit embodiment of the present invention.
Fig. 4 is high-frequency oscillating circuits embodiment of the present invention.
Fig. 5 is that air speed data of the present invention produces circuit embodiments.
Fig. 6 is speed change pulse-generating circuit embodiment of the present invention.
Fig. 7 is random wind speed upper limit regulating circuit embodiment of the present invention.
Fig. 8 is random wind speed lower limit regulating circuit embodiment of the present invention.
Fig. 9 is speed change speed control circuit embodiment of the present invention.
Figure 10 is DC power supply circuit embodiment of the present invention.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
As shown in Figure 1, a kind of random variable wind fan, is made up of high-frequency oscillating circuits, air speed data generation circuit, speed change pulse-generating circuit, D/A change-over circuit, speed change speed control circuit, random wind speed upper limit regulating circuit, random wind speed lower limit regulating circuit, power amplification circuit and DC power supply circuit, magnetically controlled saturated reactor, single-phase asynchronous motor.For the random variable wind in Fig. 1, send by the fan fan page being arranged in single-phase asynchronous motor rotating shaft.
The control winding of magnetically controlled saturated reactor is connected to the voltage output end of power amplification circuit.The embodiment of power amplification circuit adopts controlled pulse-width modulation circuit, as shown in Figure 2, be made up of voltage-controlled type pulse width modulator 101, the first resistance 102, the second resistance 103, triode 104, diode 105, voltage-controlled type pulse width modulator 101 is selected silicon oscillator LTC6692-4.The oscillation frequency that the first resistance 102 two ends are connected to respectively voltage-controlled type pulse width modulator 101 arranges end SET and publicly; The frequency dividing control end DIV of voltage-controlled type pulse width modulator 101 is connected to publicly, and when the resistance of the first resistance 102 is selected maximum value 800k Ω, the pulse frequency that voltage-controlled type pulse width modulator 101 is exported is 62.5kHz; The second resistance 103 two ends are connected to respectively the base stage of pwm pulse output terminal OUT and the triode 104 of voltage-controlled type pulse width modulator 101; Between the collector electrode of the second DC electrical source+VCC2 and triode 104, be the voltage output end of power amplification circuit, the negative electrode of diode 105 is connected to the second DC electrical source+VCC2, the anodic bonding collector electrode to triode 104; The control winding parallel of magnetically controlled saturated reactor 106 is at diode 105 two ends; The emitter of triode 104 is connected to publicly.The input end that the pulse width modulation controlled end MOD of voltage-controlled type pulse width modulator 101 is described power amplification circuit, wind speed control voltage U K is from this end input, when UK changes from 0～1V, the pwm pulse width of voltage-controlled type pulse width modulator 101, from 5%～100% variation, is controlled the VDC being added on magnetically controlled saturated reactor control winding and is changed from 5%～100%.Voltage-controlled type pulse width modulator 101 also can be selected other circuit or device, and for example, while selecting LTC6692-1, the regulation range of pwm pulse width is 0%～100%.
Single-phase asynchronous motor 107 is connected to AC 220V ac power supply after connecting with the Working winding of magnetically controlled saturated reactor 106, change magnetically controlled saturated reactor 106 and control the VDC on winding, can change the inductance value of its Working winding, and then change the single phase alternating current voltage size being added on single-phase asynchronous motor, reach the object of speed governing.
D/A change-over circuit as shown in Figure 3, is made up of the first D/A converter 201, and the model of the first D/A converter 201 is 8 imported AD5330 of parallel connection, and its 8 bit data input end DB0～DB7 is connected to air speed data signal successively
y7～
y0, data latch control end WR is connected to low frequency speed change pulse CP2, and reference voltage input terminal VREF is connected to maximum wind speed control signal Umax; Wind speed control voltage U K is from the changing voltage output terminal VOUT output of the first D/A converter 201.
High-frequency oscillating circuits as shown in Figure 4, is made up of oscillator 301, the 3rd resistance 302, and oscillator 301 is selected silicon oscillator LTC6690.The oscillation frequency that the 3rd resistance 302 two ends are connected to respectively oscillator 301 arranges end SET and publicly; The frequency dividing control end DIV of oscillator 301 is connected to publicly; High frequency oscillation pulse CP1 is from the pulse output end OUT output of oscillator 301.When the resistance of the 3rd resistance 302 is chosen as 500k Ω, the high frequency oscillation pulse CP1 frequency that oscillator 301 is exported is 100kHz.
Air speed data produces circuit as shown in Figure 5, is made up of the first counter 401, the second counter 402, the first phase inverter 403, and the first counter 401 and the second counter 402 are all selected can preset coincidence counter 74HC161.The first counter 401 and the second counter 402 adopt 8 binary addition counters of standard mode cascade composition, and the first counter 401 is low 4; The input end of the first phase inverter 403 is connected to the carry output terminal CO of the second counter 402, and output terminal is connected to the synchronous preset end LD of the first counter 401 and the second counter 402; The count pulse input end CP of the first counter 401 and the second counter 402 is connected to high frequency oscillation pulse CP1; The preset input end D3～D0 of the first counter 401 is connected to limited signal under air speed data successively
x3～
x0, terminal count output Q3～Q0 exports air speed data signal successively
y3～
y0; The preset input end D3～D0 of the second counter 402 is connected to limited signal under air speed data successively
x7～
x4, terminal count output Q3～Q0 exports air speed data signal successively
y7～
y4.
Speed change pulse-generating circuit is voltage controlled oscillator, embodiment as shown in Figure 6, form voltage controlled oscillator by the one 555 time base apparatus part 501, the 4th resistance 502, the 5th resistance 503, the first electric capacity 504, low frequency speed change pulse CP2 exports from the output terminal 3 of the one 555 time base apparatus part 501, is connected to the data latch control end WR of the first D/A converter; Speed change speed control voltage UF inputs from the input end 5 of the one 555 time base apparatus part 501; The control voltage input end that the input end 5 of the one 555 time base apparatus part 501 is voltage controlled oscillator.
Random wind speed upper limit regulating circuit output maximum wind speed control signal, embodiment as shown in Figure 7, is made up of the first amplifier 601, the 6th resistance 602, the 7th resistance 604, the 8th resistance 606, voltage-stabiliser tube 603, the first potentiometer 605.The 6th resistance 602, voltage-stabiliser tube 603 form mu balanced circuit, and the 7th resistance 604, the first potentiometer 605, the 8th resistance 606 form voltage divider, the follower output maximum wind speed control signal Umax that voltage divider consists of the first amplifier 601.
Limited signal under random wind speed lower limit regulating circuit output air speed data, embodiment as shown in Figure 8, is made up of A/D converter 701, the second potentiometer 702, the 9th resistance 703.The model of A/D converter 701 is ADC0841.A/D converter 701 is arranged to the flow work state, and it starts conversion input end WR and is connected to low frequency speed change pulse CP2, often carrys out a pulse and starts conversion once; Its output control terminal RD is connected to publicly, and data output end DB0～DB7 directly exports each transformation result.The output voltage of the voltage divider that the second potentiometer 702, the 9th resistance 703 form is connected to the analog voltage input VIN+ of A/D converter 701, limited signal under data output end DB7～DB0 output air speed data of A/D converter 701
x7～
x0.Limited signal under air speed data
x7～
x0 also can be by toggle switch, or rotary coding switch is set.
Speed change speed control circuit produces the speed change speed control voltage UF output of a change at random, embodiment's circuit as shown in Figure 9, is made up of the 3rd counter 801, four-counter 802, the second phase inverter the 803, the 2 555 time base apparatus part 804, the tenth resistance the 805, the 11 resistance 806, the second electric capacity 807, the second D/A converter 808, the second amplifier 809.The 3rd counter 801, four-counter 802 selected can preset coincidence counter 74HC161, and the 3rd counter 801 and four-counter 802 adopt standard mode cascade to form 8 binary addition counters, and the 3rd counter 801 is low 4; The input end of the second phase inverter 803 is connected to the carry output terminal CO of four-counter 802, and output terminal is connected to the synchronous preset end LD of the 3rd counter 801 and four-counter 802; The count pulse CP of the 3rd counter 801, four-counter 802 is connected to high frequency oscillation pulse CP1,8 signals of terminal count output output
z7～
z0 is connected to the data input pin DB0～DB7 of the second D/A converter 808 successively.The 2 555 time base apparatus part 804, the tenth resistance the 805, the 11 resistance 806, the second electric capacity 807 form Low Frequency Oscillator, low frequency oscillation pulse is exported from the output terminal 3 of the 2 555 time base apparatus part 804, is connected to the data latch control end WR of the second D/A converter 808.The changing voltage output terminal VOUT of the second D/A converter 808 is connected to the follower input end that the second amplifier 809 forms; Speed change speed control voltage UF is from the output terminal output of the second amplifier 809.The model of the second D/A converter 808 is 8 imported AD5330 of parallel connection.
DC power supply circuit output two-way DC electrical source, is made up of transformer pressure-reducing, rectifier bridge rectification and capacitor filter, as shown in figure 10.The first DC electrical source+VCC1 voltage is+5V to be produced by the first rectifier bridge 902 rectifications, the 3rd electric capacity 903 filtering; The second DC electrical source+VCC2 voltage is+24V to be produced by the second rectifier bridge 904 rectifications, the 4th electric capacity 905 filtering; The AC-input voltage of the first rectifier bridge 902, the second rectifier bridge 904 is exported by the different secondary windings of transformer 901.
Described random variable wind fan work principle is:
1, power amplification circuit is output as the control winding VDC of magnetically controlled saturated reactor, and fan speed is controlled by the wind speed control voltage U K that is applied to power amplification circuit input end.
2, wind speed control voltage U K exports from D/A change-over circuit.
3, regulate the reference input voltage VREF size of D/A change-over circuit, can regulate the wind speed maximum value of random variable wind; In the present embodiment, the reference input voltage VREF of D/A change-over circuit is the maximum wind speed control signal Umax of random wind speed upper limit regulating circuit output, by regulating the first potentiometer 605 to change the maximum value of random variable wind wind speed.
4, the periodically variable air speed data signal of high speed that the data input pin of D/A change-over circuit DB7～DB0 input minimum value can be set
y7～
y0; Air speed data signal
y7～
y0 counts generation by automatic pre-set initial value counter to high frequency oscillation pulse CP1; Change the preset initial value of automatic pre-set initial value counter, can regulate the wind speed minimum value of random variable wind; In the present embodiment, counter is 8 binary addition counters of two 74HC161 compositions; The preset initial value of automatic pre-set initial value counter is limited signal under air speed data
x7～
x0; Limited signal under air speed data
x7～
x0 is exported by random wind speed lower limit regulating circuit; Air speed data signal
y7～
y0 minimum value is set as limited signal under air speed data
x7～
x0, maximum value is binary one 1111111B; Air speed data signal
y7～
y0 periodically from
x7～
x0 changes to 11111111B, goes round and begins again; Because the wind speed that air speed data 11111111B is corresponding is controlled by maximum wind speed control signal Umax, therefore, limited signal under air speed data
x7～
xthe 0 wind speed minimum value of setting is actually the relative minimum of the maximum wind speed that 11111111B is corresponding, limited signal under air speed data
x7～
x0 set be a wind speed relative fluctuation range; Limited signal under air speed data
x7～
x0 is large, and wind speed relative fluctuation range is little; Limited signal under air speed data
x7～
x0 is little, and wind speed relative fluctuation range is large; Limited signal under air speed data
x7～
x0 while being set to maximum value 11111111B, and wind speed can not produce fluctuation, now realizes the stepless speed regulation of fan by regulating the first potentiometer 605 to change maximum wind speed control signal Umax.
5, the data latch control end WR of D/A change-over circuit access low frequency speed change pulse CP2; Low frequency speed change pulse CP2 is produced by voltage controlled oscillator; On the effective edge edge of each low frequency speed change pulse CP2 of D/A change-over circuit data latch control end WR, all catch and the periodically variable air speed data signal of latch
y7～
ya value in 0 is carried out D/A conversion, and due to the impact of the enchancement factor such as mains voltage fluctuation, circuit parameter variations, low frequency speed change pulse CP2 is to the periodically variable air speed data signal of high speed
y7～
y0 each data that catches latch have randomness.
6, the speed change speed control voltage UF that the voltage control signal of voltage controlled oscillator is change at random; In the present embodiment, speed change speed control voltage UF is produced by speed change speed control circuit, and the minimum value of speed change speed control voltage UF, by the preset initial value design of presettable counter in speed change speed control circuit, is specially binary number 10000010B; The change in count scope of counter is 10000010B～11111111B; Increase preset initial value, the excursion of speed change speed control voltage UF reduces; Reduce preset initial value, the excursion of speed change speed control voltage UF increases.
7, low frequency speed change pulse CP2 is that the voltage controlled oscillator of random signal produces by controlling voltage, makes on the one hand the speed that random variable wind wind speed changes can randomly changing, has increased on the other hand the periodically variable air speed data signal of low frequency speed change pulse CP2 and high speed
y7～
yrandomness between 0.
The foregoing is only embodiments of the invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in claim scope of the present invention.
Claims (10)
1. a random variable wind fan, is characterized in that:
Formed by high-frequency oscillating circuits, air speed data generation circuit, speed change pulse-generating circuit, D/A change-over circuit, speed change speed control circuit, random wind speed upper limit regulating circuit, random wind speed lower limit regulating circuit, power amplification circuit and DC power supply circuit, magnetically controlled saturated reactor, single-phase asynchronous motor;
Described single-phase asynchronous motor is connected to ac power supply after connecting with the Working winding of magnetically controlled saturated reactor;
The control winding of described magnetically controlled saturated reactor is connected to the voltage output end of power amplification circuit;
It is automatic pre-set initial value counter that described air speed data produces circuit;
The count pulse input end of described automatic pre-set initial value counter is connected to the high frequency oscillation pulse of high-frequency oscillating circuits output, and preset end is connected to limited signal under the air speed data of random wind speed lower limit regulating circuit output;
Described D/A change-over circuit is made up of the first D/A converter, the output voltage of the first D/A converter is connected to the input end of power amplification circuit, data input pin is connected to the terminal count output of automatic pre-set initial value counter successively, reference voltage input terminal is connected to the maximum wind speed control signal of random wind speed upper limit regulating circuit output, and data latch control end is connected to the low frequency speed change pulse of speed change pulse-generating circuit output;
Described speed change pulse-generating circuit is voltage controlled oscillator;
The voltage control signal of described voltage controlled oscillator is connected to the speed change speed control voltage of speed change speed control circuit output;
Described DC electrical source comprises the first DC electrical source and the second DC electrical source; Described the first DC electrical source and the second DC electrical source are all made up of transformer pressure-reducing, rectifier bridge rectification and capacitor filter.
2. random variable wind fan as claimed in claim 1, is characterized in that, described the first D/A converter is 8 imported AD5330 of parallel connection.
3. random variable wind fan as claimed in claim 2, is characterized in that, described power amplification circuit adopts controlled pulse-width modulation circuit, is made up of voltage-controlled type pulse width modulator, the first resistance, the second resistance, triode, diode; The oscillation frequency that the first resistance two ends are connected to respectively voltage-controlled type pulse width modulator arranges end and publicly; The frequency dividing control end of voltage-controlled type pulse width modulator is connected to publicly; The second resistance two ends are connected to respectively the pwm pulse output terminal of voltage-controlled type pulse width modulator and the base stage of triode; The emitter of triode is connected to publicly; The negative electrode of diode is connected to the second DC electrical source, the anodic bonding collector electrode to triode; The control winding parallel of magnetically controlled saturated reactor is at diode two ends; The input end that the pulse width modulation controlled end of voltage-controlled type pulse width modulator is described power amplification circuit; Voltage-controlled type pulse width modulator is selected silicon oscillator LTC6692-4.
4. random variable wind fan as claimed in claim 2, is characterized in that, described high-frequency oscillating circuits is made up of oscillator, the 3rd resistance; The oscillation frequency that the 3rd resistance two ends are connected to respectively oscillator arranges end and publicly; The frequency dividing control end of oscillator is connected to publicly; High frequency oscillation pulse is from the pulse output end output of oscillator; Oscillator is selected silicon oscillator LTC6690.
5. random variable wind fan as claimed in claim 2, is characterized in that, described automatic pre-set initial value counter is made up of the first counter, the second counter, the first phase inverter; The first counter and the second counter 402 are all selected can preset coincidence counter 74HC161; The first counter and the second counter adopt 8 binary addition counters of standard mode cascade composition, and the first counter is low 4; The input end of the first phase inverter is connected to the carry output terminal of the second counter, and output terminal is connected to the synchronous preset end of the first counter and the second counter.
6. random variable wind fan as claimed in claim 2, is characterized in that, described voltage controlled oscillator is made up of the one 555 time base apparatus part, the 4th resistance, the 5th resistance, the first electric capacity.
7. random variable wind fan as claimed in claim 2, is characterized in that, described random wind speed upper limit regulating circuit is made up of the first amplifier, the 6th resistance, the 7th resistance, the 8th resistance, voltage-stabiliser tube, the first potentiometer; The 6th resistance, voltage-stabiliser tube composition mu balanced circuit, the 7th resistance, the first potentiometer, the 8th resistor group become voltage divider; Voltage divider is by the follower output maximum wind speed control signal of the first amplifier composition.
8. random variable wind fan as claimed in claim 2, is characterized in that, described random wind speed lower limit regulating circuit is made up of A/D converter, the second potentiometer, the 9th resistance; The output voltage of the voltage divider of the second potentiometer, the 9th resistance composition is connected to the analog voltage input of A/D converter; The startup conversion input end of A/D converter is connected to the pulse of low frequency speed change, and output control terminal is connected to publicly, limited signal under data output end output air speed data; The model of A/D converter is ADC0841.
9. random variable wind fan as claimed in claim 2, it is characterized in that, described speed change speed control circuit is made up of the 3rd counter, four-counter, the second phase inverter, the 2 555 time base apparatus part, the tenth resistance, the 11 resistance, the second electric capacity, the second D/A converter, the second amplifier; The 3rd counter, four-counter are selected can preset coincidence counter 74HC161; The 3rd counter and four-counter adopt 8 binary addition counters of standard mode cascade composition, and the 3rd counter is low 4; The input end of the second phase inverter is connected to the carry output terminal of four-counter, and output terminal is connected to the synchronous preset end of the 3rd counter and four-counter; The count pulse of the 3rd counter, four-counter is connected to high frequency oscillation pulse, and 8 signals of terminal count output output are connected to the data input pin of the second D/A converter successively; The 2 555 time base apparatus part, the tenth resistance, the 11 resistance, the second electric capacity composition Low Frequency Oscillator, low frequency oscillation pulse, from the output terminal output of the 2 555 time base apparatus part, is connected to the data latch control end of the second D/A converter; The changing voltage output terminal of the second D/A converter is connected to the follower input end of the second amplifier composition; Speed change speed control voltage is from the output terminal output of the second amplifier; The model of the second D/A converter is 8 imported AD5330 of parallel connection.
10. a random variable wind production method, comprises and utilizes the random variable wind fan described in any one in claim 1 to 9, it is characterized in that,
A, power amplification circuit are output as the control winding VDC of magnetically controlled saturated reactor, and fan speed is by the wind speed control Control of Voltage that is applied to power amplification circuit input end;
B, wind speed control voltage are exported from D/A change-over circuit;
C, regulate the reference input voltage size of D/A change-over circuit, can regulate the wind speed maximum value of random variable wind;
The periodically variable air speed data signal of high speed that the data input pin input minimum value of D, D/A change-over circuit can be set;
E, air speed data signal by automatic pre-set initial value counter to high frequency oscillation pulse count generation;
F, change the preset initial value of automatic pre-set initial value counter, can regulate the wind speed minimum value of random variable wind;
The data latch control end access low frequency speed change pulse of G, D/A change-over circuit;
H, the pulse of low frequency speed change are produced by voltage controlled oscillator;
The voltage control signal of I, voltage controlled oscillator is the speed change speed control voltage of change at random.
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| CN201410217968.XA CN103994089B (en) | 2014-05-22 | 2014-05-22 | A kind of random variable wind fan and random variable wind production method |
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| CN201410217968.XA CN103994089B (en) | 2014-05-22 | 2014-05-22 | A kind of random variable wind fan and random variable wind production method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109026813A (en) * | 2018-10-22 | 2018-12-18 | 中车洛阳机车有限公司 | Electric locomotive breeze fan test tool equipment |
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| CN103244448A (en) * | 2013-05-22 | 2013-08-14 | 湖南工业大学 | Natural wind simulating fan and method |
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| JPH04365995A (en) * | 1991-06-13 | 1992-12-17 | Sanyo Electric Co Ltd | Electric fan |
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| CN109026813A (en) * | 2018-10-22 | 2018-12-18 | 中车洛阳机车有限公司 | Electric locomotive breeze fan test tool equipment |
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