CN208044449U - A kind of contactless alternating current voltage stabilizer - Google Patents

Abstract

The utility model provides a kind of contactless alternating current voltage stabilizer, including zero cross fired control circuit, auto-transformer, input sampling circuit and microcontroller, wherein：Zero cross fired control circuit, connect with auto-transformer and microcontroller respectively, including multiple zero cross fired branches, and zero cross fired branch includes silicon-controlled unit and optocoupler unit；Each input terminal of auto-transformer is connected each zero cross fired branch respectively, and each input terminal is corresponded with each zero cross fired branch, and output end is connected with load；Input sampling circuit is connect with zero cross fired control circuit, for acquiring input voltage；Microcontroller is connect with input sampling circuit, and generating zero cross fired according to input voltage controls signal, and input terminal the number of turns of Signal Regulation auto-transformer is controlled according to zero cross fired.Optocoupler unit between microcontroller and silicon-controlled unit improves contactless alternating current voltage stabilizer reliability it is possible to prevente effectively from two silicon-controlled units simultaneously turn on when auto-transformer input terminal switches.

Description

A kind of contactless alternating current voltage stabilizer

Technical field

The utility model is related to voltage stabilizer fields, and in particular to a kind of contactless alternating current voltage stabilizer.

Background technology

Due to electric system supply spread of voltage, especially voltage fluctuation it is larger in the case of, electricity consumption cannot be met and set Standby input voltage requirement, to influence the normal work of electrical equipment, or even causes the damage of electrical equipment.AC voltage regulator As a kind of electronic device being capable of providing stable AC power, the market demand is increasing.With the development of electronic technology, Requirement of the various electrical equipments to the precision of voltage regulation of AC voltage regulator is higher and higher.

Currently, common voltage-stablizer is contactless alternating current voltage stabilizer, silicon-controlled unit is usually as in non-contact voltage stabilizer General controllable switch unit, is connected in the tap of voltage-stablizer, silicon-controlled by controlling to according to the fluctuation of input voltage Turn-on and turn-off, change voltage-stablizer in tap different access ways, adjust voltage-stablizer in output and input turn ratio, with Achieve the effect that export voltage stabilizing.

The mode of silicon-controlled unit generally use voltage over zero break-make realizes the adjustment to voltage-stablizer, i.e., upper one controllable Silicon unit is turned off in voltage over zero, meanwhile, next silicon-controlled unit is connected in voltage over zero, realizes that synchronizing for circuit is cut It changes.But due to the self-characteristic of thyristor, determine that its shutdown point is not necessarily first after shutdown controls signal A voltage over zero just realizes shutdown immediately, and at this point, next silicon-controlled unit has turned on, it is thus possible to can exist adjacent Two silicon-controlled units the case where simultaneously turning on, to lead to short circuit between two taps, therefore lack there are reliability is low It falls into.

Utility model content

Therefore, the technical problem to be solved by the present invention is to overcome in the prior art contactless alternating current voltage stabilizer it is reliable The low defect of property.

For this purpose, the utility model provides a kind of contactless alternating current voltage stabilizer, including zero cross fired control circuit, self coupling transformation Device, input sampling circuit and microcontroller, wherein the zero cross fired control circuit, respectively with the auto-transformer and institute Microcontroller connection is stated, the zero cross fired control circuit includes multiple zero cross fired branches；The zero cross fired branch includes can Control silicon unit and optocoupler unit, the first input end of the optocoupler unit are connect with the first power supply, and the second of the optocoupler unit Input terminal is connect with the zero cross fired control terminal of the microcontroller, the first output end of the optocoupler unit and the silicon-controlled list The input terminal connection of member, the second output terminal of the optocoupler unit are connect with the control terminal of the silicon-controlled unit, described controllable The input terminal of silicon unit is connect with AC power, and the output end of the silicon-controlled unit connects with the input terminal of the auto-transformer It connects；Each input terminal of the auto-transformer is connected each zero cross fired branch respectively, each input of the auto-transformer End is corresponded with the multiple zero cross fired branch, and output end and the load of the auto-transformer connect；The input is adopted Sample circuit is connect with the zero cross fired control circuit, for acquiring input voltage；The microcontroller, with the input sample Circuit connects, and controls signal for generating zero cross fired according to the collected input voltage, and according to the zero cross fired Control input terminal the number of turns of auto-transformer described in Signal Regulation.

Optionally, the input sampling circuit includes first resistor, second resistance, 3rd resistor, the 4th resistance and One capacitance, the first end of the first resistor are connect with the input terminal of the silicon-controlled unit, the second end of the first resistor It being connect with the first end of the second resistance, the second end of the second resistance is connect with ground wire, and the first of the second resistance End is connect with the first end of first capacitance, and the second end of first capacitance is connect with the second end of the 3rd resistor, And connect with the first end of the 4th resistance, the first end of the 3rd resistor is connect with second source, the 4th resistance Second end connect with ground wire, the first end of the 4th resistance is connect with the input voltage sampling end of the microcontroller.

Optionally, further include protecting against shock delay circuit, with AC power, the zero cross fired control circuit, the self coupling Transformer is connected with the microcontroller, and the protecting against shock postpones signal for being sent out according to the microcontroller controls the protecting against shock and prolongs Slow circuit is connect with the zero cross fired control circuit or auto-transformer.

Optionally, the input terminal of the protecting against shock delay circuit is connect with AC power, the protecting against shock delay circuit First output end is connect with the zero cross fired control circuit, second output terminal and the self coupling of the protecting against shock delay circuit Transformer connects, and the control terminal of the protecting against shock delay circuit is connect with the microcontroller, and the protecting against shock delay circuit includes The first end of first relay, the first triode and surge resistance, the coil of first relay is connect with third power supply, The second end of the coil of first relay is connect with the first end of first triode, and the first of first relay Switch the first contact connect with the first end of the surge resistance and AC power, the second contact of the first switch and The input terminal of the silicon-controlled unit connects, the third contact of the first switch and the second end of the surge resistance and Any input terminal of the auto-transformer connects, and the second end of first triode is connect with ground wire, the one or three pole The control terminal of pipe is connect with the protecting against shock of microcontroller delay end.

Optionally, further include output sample circuit, connect respectively with the output end of the auto-transformer and the microcontroller It connects, for acquiring output voltage and the output voltage being transmitted to the microcontroller.

Optionally, the output sample circuit includes the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance and the The first end of two capacitances, the 5th resistance is connect with the output end of the auto-transformer, the second end of the 5th resistance It being connect with the first end of the 6th resistance, the second end of the 6th resistance is connect with ground wire, and the first of the 6th resistance End is connect with the first end of second capacitance, and the second end of second capacitance is connect with the second end of the 7th resistance, And connect with the first end of the 8th resistance, the first end of the 7th resistance is connect with the 4th power supply, the 8th resistance Second end connect with ground wire, the first end of the 8th resistance is connect with the output voltage sampling end of the microcontroller.

Optionally, further include current detection circuit, connect respectively with the zero cross fired control circuit and the microcontroller, For acquiring input current and the input current being transmitted to the microcontroller.

Optionally, the current detection circuit include current transformer, the 9th resistance, the tenth resistance, eleventh resistor and Third capacitance, the first side winding of the current transformer are connected in series in the input terminal of the silicon-controlled unit, the electric current The secondary side winding of mutual inductor is connect with the 9th resistor coupled in parallel, first end and the third capacitance of the 9th resistance First end connects, and the second end of the 9th resistance is connect with ground wire, and the first end of the tenth resistance is connect with the 5th power supply, The second end of tenth resistance respectively with the first end of the eleventh resistor, the second end of the third capacitance and described The output electric current measure end of microcontroller connects, and the second end of the eleventh resistor is connect with ground wire.

Optionally, further include temperature sensing circuit, connect respectively with the auto-transformer and the microcontroller, for adopting Collect the temperature of the auto-transformer and the temperature is transmitted to the microcontroller.

Optionally, the temperature sensing circuit includes temperature sensor, twelfth resistor and thirteenth resistor, the temperature Sensor is set on the auto-transformer, and the first end of the temperature sensor is connect with the 6th power supply, and the temperature passes The second end of sensor is connect with the second end of the first end of twelfth resistor and the thirteenth resistor respectively, the 12nd electricity The second end of resistance is connect with ground wire, and the first end of the thirteenth resistor is connect with the temperature detection end of the microcontroller.

Optionally, further include protection control circuit, connect respectively with the output end of the auto-transformer and the microcontroller It connects, the output loop that the protection control signal for being sent out according to the microcontroller controls the auto-transformer disconnects.

Optionally, the protection control circuit includes the second relay and the second triode, the line of second relay The first end of circle is connect with the 7th power supply, the first end of the second end of the coil of second relay and second triode Connection, the first switch of second relay are connected in series in the output loop of the auto-transformer, and the described 2nd 3 The second end of pole pipe is connect with ground wire, and the control terminal of second triode connects with the protection control signal end of the microcontroller It connects.

Optionally, further include draught fan control circuit, connect with the microcontroller, the wind for being sent out according to the microcontroller Machine control signal controls wind turbine.

Optionally, the draught fan control circuit includes third transistor and wind turbine, the control terminal of the third transistor with The air-blower control signal end of the microcontroller connects, and the first end of the third transistor is connect with the first end of the wind turbine, The second end of the third transistor is connect with ground wire, and the second end of the wind turbine is connect with the 8th power supply.

Optionally, further include steady pressure of system power supply circuit, connect with the auto-transformer, for providing contactless exchange Power supply needed for voltage-stablizer.

Optionally, the steady pressure of system power supply circuit includes that full-bridge rectification, zener diode, the 4th triode, three ends can Adjust shunt reference source, the 14th resistance and the 15th resistance, time of the input terminal of the full-bridge rectification and the auto-transformer The of grade coil connection, the first output end of the full-bridge rectification and the cathode of the zener diode and the 4th triode One end connects, and the second output terminal of the full-bridge rectification connect with the anode of the zener diode and ground wire respectively, and described the The control terminal of four triodes is connect with the cathode of three end adjustable shunt reference source, the second end of the 4th triode and institute State the first end connection of the 14th resistance, the reference pole of three end adjustable shunt reference source respectively with the 14th resistance Second end is connected with the first end of the 15th resistance, and the anode of three end adjustable shunt reference source is respectively with the described tenth The second end of five resistance is connected with ground wire.

Technical solutions of the utility model have the following advantages that：

Contactless alternating current voltage stabilizer provided by the utility model, including zero cross fired control circuit, auto-transformer, input Sample circuit and microcontroller, wherein the zero cross fired control circuit, respectively with the auto-transformer and the microcontroller Connection, the zero cross fired control circuit includes multiple zero cross fired branches；The zero cross fired branch includes silicon-controlled unit Connect with the first power supply with the first input end of optocoupler unit, the optocoupler unit, the second input terminal of the optocoupler unit with The zero cross fired control terminal of the microcontroller connects, the input of the first output end of the optocoupler unit and the silicon-controlled unit End connection, the second output terminal of the optocoupler unit are connect with the control terminal of the silicon-controlled unit, the silicon-controlled unit Input terminal is connect with AC power, and the output end of the silicon-controlled unit is connect with the input terminal of the auto-transformer；It is described Each input terminal of auto-transformer is connected each zero cross fired branch respectively, each input terminal of the auto-transformer with it is described Multiple zero cross fired branches correspond, and output end and the load of the auto-transformer connect；The input sampling circuit, with The zero cross fired control circuit connection, for acquiring input voltage；The microcontroller is connect with the input sampling circuit, Signal is controlled for generating zero cross fired according to the collected input voltage, and signal tune is controlled according to the zero cross fired Save input terminal the number of turns of the auto-transformer.Microcontroller is controlled according to the variation of the collected input voltage of input sampling circuit Branch conducting in multiple zero cross fired branches in zero cross fired control circuit, and then change the input of auto-transformer End turn number ensures the stabilization of output voltage；Optocoupler unit between microcontroller and silicon-controlled unit is it is possible to prevente effectively from self coupling becomes Two silicon-controlled units simultaneously turn on when depressor input terminal switches, and improve contactless alternating current voltage stabilizer reliability.

Description of the drawings

It, below will be right in order to illustrate more clearly of specific embodiment of the present invention or technical solution in the prior art Specific implementation mode or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, it is described below In attached drawing be that some embodiments of the utility model are not paying creativeness for those of ordinary skill in the art Under the premise of labour, other drawings may also be obtained based on these drawings.

Fig. 1 is the schematic diagram of a specific example of contactless alternating current voltage stabilizer in the utility model embodiment；

Fig. 2 is the schematic diagram of another specific example of contactless alternating current voltage stabilizer in the utility model embodiment；

Fig. 3 is the schematic diagram of another specific example of contactless alternating current voltage stabilizer in the utility model embodiment.

Specific implementation mode

The technical solution of the utility model is clearly and completely described below in conjunction with attached drawing, it is clear that described Embodiment is the utility model a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, originally The every other embodiment that field those of ordinary skill is obtained without making creative work, belongs to this practicality Novel protected range.

It is in the description of the present invention, it should be noted that term "center", "upper", "lower", "left", "right", " perpendicular Directly ", the orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, and is only The utility model and simplifying describes for ease of description, do not indicate or imply the indicated device or element must have it is specific Orientation, with specific azimuth configuration and operation, therefore should not be understood as limiting the present invention.In addition, term " the One ", " second ", " third " are used for description purposes only, and are not understood to indicate or imply relative importance.

In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally Connection；It can be mechanical connection, can also be electrical connection；Can be directly connected, can also indirectly connected through an intermediary, It can also be the connection inside two elements, can be wirelessly connected, can also be wired connection.For the common skill of this field For art personnel, the concrete meaning of above-mentioned term in the present invention can be understood with concrete condition.

In addition, as long as technical characteristic involved in the utility model different embodiments disclosed below is each other Not constituting conflict can be combined with each other.

The present embodiment provides a kind of contactless alternating current voltage stabilizers, as shown in Figure 1, including：Zero cross fired control circuit 1, from Coupling transformer 2, input sampling circuit 3 and microcontroller 4.

Zero cross fired control circuit 1 is connect with auto-transformer 2 and microcontroller 4 respectively, and zero cross fired control circuit 1 is wrapped Include multiple zero cross fired branches；Zero cross fired branch includes silicon-controlled unit TR and optocoupler unit OC, and the first of optocoupler unit OC Input terminal is connect with the first power vd D1, and the second input terminal of optocoupler unit OC is connect with the zero cross fired control terminal of microcontroller 4, The first output end of optocoupler unit OC is connect with the input terminal of silicon-controlled unit TR, the second output terminal of optocoupler unit OC with it is controllable The control terminal of silicon unit TR connects, and the input terminal of silicon-controlled unit TR is connect with AC power, the output end of silicon-controlled unit TR It is connect with the input terminal of auto-transformer 2.In the present embodiment, in order to give the offer of optocoupler unit suitable trigger current, such as Fig. 3 Shown, zero cross fired control circuit 1 further includes current-limiting resistance RC, and it is second defeated to be connected in series in optocoupler unit OC by current-limiting resistance RC Enter between end and the zero cross fired control terminal of microcontroller 4.In order to give silicon-controlled unit TR to provide suitable trigger current, current limliting electricity Resistance RC is also connected in series between the first output end of optocoupler unit OC and the input terminal of silicon-controlled unit TR.It is silicon-controlled in order to give Unit TR provides suitable control terminal voltage, current-limiting resistance RC be also connected in series in the second output terminal of optocoupler unit OC with it is controllable Between the control terminal of silicon unit TR.DC control signal impacts in order to prevent, protects silicon-controlled unit TR, zero cross fired control electricity Road 1 further includes silicon-controlled cell protection resistance RT, and silicon-controlled cell protection resistance RT is connected in parallel in the of silicon-controlled unit TR Between one output end and second output terminal.

In the present embodiment, the voltage value of the first power vd D1 is that 5V certainly in other embodiments, also can be according to need It is set as other values, such as 4V or 7V.

Each input terminal of auto-transformer 2 is connected each zero cross fired branch respectively, each input terminal of auto-transformer 2 with Each zero cross fired branch corresponds, and output end and the load of auto-transformer 2 connect.Zero cross fired branch is controlled by microcontroller Branch conducting in road, input tap and the ac power input end VIN of the auto-transformer of conducting branches connection connect It connects.

In the present embodiment, as shown in Fig. 2, auto-transformer 2 includes 8 input taps, it is denoted as the first input pumping respectively Head, the second input tap, third input tap, the 4th input tap, the 5th input tap, the 6th input tap, the 7th input Tap and the 8th input tap, each the number of turns for inputting the corresponding primary coil of tap is different, i.e., different input terminal and defeated Different turn ratios is corresponded between outlet.Each input tap corresponds to an auto-transformer input terminal, therefore includes that 8 self couplings become Depressor input terminal is denoted as auto-transformer first input end V1, the second input terminal V2, third input terminal V3, the 4th input respectively Hold V4, the 5th input terminal V5, the 6th input terminal V6, the 7th input terminal V7 and the 8th input terminal V8.Input tap and input terminal Correspondence be：It is defeated that first input tap corresponds to first input end V1, second the second input terminal V2 of input tap correspondence, third Enter tap and corresponds to third input terminal V3, the 4th the 4th input terminal V4 of input tap correspondence, the 5th input of the 5th input tap correspondence V5, the 6th input tap is held to correspond to the 6th input terminal V6, the 7th input tap corresponds to the 7th input terminal V7, the 8th input tap pair Answer the 8th input terminal V8.

As shown in Fig. 2, the zero cross fired control terminal of microcontroller 4 also includes 8, respectively zero cross fired control terminal PIN17, PIN18 ..., PIN24, a zero cross fired branch of connecting between each Input voltage terminal and the zero cross fired control terminal of microcontroller 4 Road, therefore zero cross fired control circuit 1 includes 8 zero cross fired branches, is denoted as the first zero cross fired branch respectively, the second zero passage is touched Send out branch, third zero cross fired branch, the 4th zero cross fired branch, the 5th zero cross fired branch, the 6th zero cross fired branch, the Seven zero cross fired branches and the 8th zero cross fired branch.Auto-transformer input terminal, zero cross fired control terminal and zero cross fired The correspondence of branch is：First zero passage of connecting between first input end V1 and the zero cross fired control terminal PIN24 of microcontroller 4 is touched Send out branch, the second input terminal V2 and the second zero cross fired branch of connecting between the zero cross fired control terminal PIN23 of microcontroller 4, Series connection third zero cross fired branch, the 4th input terminal between third input terminal V3 and the zero cross fired control terminal PIN22 of microcontroller 4 The 4th zero cross fired branch of series connection, the 5th input terminal V5 and microcontroller between V4 and the zero cross fired control terminal PIN21 of microcontroller 4 The zero passage of the 5th zero cross fired branch of series connection, the 6th input terminal V6 and microcontroller 4 is touched between 4 zero cross fired control terminal PIN20 The zero cross fired control terminal of the 6th zero cross fired branch of series connection, the 7th input terminal V7 and microcontroller 4 between hair control terminal PIN19 It connects between the 7th zero cross fired branch, the 8th input terminal V8 and the zero cross fired control terminal PIN17 of microcontroller 4 between PIN18 It connects the 8th zero cross fired branch.

In the present embodiment, as shown in figure 3, the voltage value of the output end VOUT of auto-transformer 2 is 220V, self coupling transformation The voltage value of the first input end V1 of device 2 is 255V, at this point, it is 255V output electricity that input and output turn ratio, which can meet input voltage, Pressure is 220V；The voltage value of second input terminal V2 is 237V, at this point, it is that 237V is defeated that input and output turn ratio, which can meet input voltage, It is 220V to go out voltage；The voltage value of third input terminal V3 is 220V, at this point, input and output turn ratio can meet input voltage is 220V output voltages are 220V；The voltage value of 4th input terminal V4 is 204V, at this point, input and output turn ratio can meet input electricity It is 220V that pressure, which is 204V output voltages,；The voltage value of 5th input terminal V5 be 190V, at this point, input and output turn ratio can meet it is defeated It is 220V that enter voltage, which be 190V output voltages,；The voltage value of 6th input terminal V6 is 177V, at this point, input and output turn ratio can expire Sufficient input voltage is that 177V output voltages are 220V；The voltage value of 7th input terminal V7 is 165V, at this point, input and output turn ratio It is 220V that input voltage can be met, which is 165V output voltages,；The voltage value of 8th input terminal V8 is 153V, at this point, input and output circle Number is 220V than can to meet input voltage be 153V output voltages；Certainly, in other embodiments, the input terminal of auto-transformer Number and voltage value setting it is more, the adjusting of output voltage is more accurate, therefore can rationally be arranged according to actual needs.

Input sampling circuit 3 is connect with zero cross fired control circuit 1, for acquiring input voltage.

In the present embodiment, input sampling circuit 3, as shown in Fig. 2, including first resistor R1, second resistance R2, third electricity Resistance R3, the 4th resistance R4 and the first capacitance C1, the first end of first resistor R1 are connect with the input terminal of silicon-controlled unit TR, the The second end of one resistance R1 is connect with the first end of second resistance R2, and the second end of second resistance R2 is connect with ground wire GND, and second The first end of resistance R2 is connect with the first end of the first capacitance C1, the second end of the second end and 3rd resistor R3 of the first capacitance C1 Connection, and connect with the first end of the 4th resistance R4, the first end of 3rd resistor R3 is connect with third power vd D3, the 4th resistance The second end of R4 is connect with ground wire GND, and the first end of the 4th resistance R4 is connect with the input voltage sampling end PIN4 of microcontroller 4. Be depressured by first resistor R1, meet second resistance R2 after decompression over the ground, in order to prevent sampled voltage impact, by the first capacitance C1 every From pick-up, then by second source VDD2,3rd resistor R3 and the 4th resistance R4, base separates the accurate input voltage sampling of a height Signal gives microcontroller 4 and is used as virtual value calculation processing, therefore the collected input voltage signal waveform of input sampling circuit is preferable, The sampling precision of input sampling circuit is higher so that the motor control that microcontroller obtains after handling input voltage sampled signal Signal processed is more accurate, so that the adjusting of output voltage is more quickly, accurately.

Since electrolytic capacitor has, rated capacity is big, capacitance per unit volume amount is big, preparation process is simply and at production cost Low advantage, the first capacitance C1 is electrolytic capacitor, as shown in Fig. 2, first end of the cathode of electrolytic capacitor as the first capacitance C1 Connect with the first end of second resistance R2, the anode of electrolytic capacitor as the first capacitance C1 second end and 3rd resistor R3 the Two ends connect；Certainly, in other embodiments, the first capacitance C1 may be other types of capacitance, such as tantalum capacitance, according to need Rationally to be arranged.

In the present embodiment, the voltage value of second source VDD2 is 5V, certainly, in other embodiments, or its It is worth, such as 4V or 7V, when the voltage value of second source VDD2 changes, can accordingly adjust the electricity of 3rd resistor R3 and the 4th The resistance value size of R4 is hindered, as long as can ensure that the voltage of second end output of 3rd resistor R3 and the input voltage of microcontroller sample Hold voltage value matching needed for PIN4.

First resistor R1 is needed as input voltage dropping resistor by the voltage drop of collected auto-transformer input terminal Down to suitable range, it can just make collected input voltage and electricity needed for microcontroller on second resistance R2 (sampling resistor) in this way Pressure matching, therefore first resistor R1 needs to bear larger voltage drop, while ensureing that the size of current for flowing through resistance is suitable again, no As for damage device, resistance value may be larger needed for first resistor R1.In this case, when the resistance value of required first resistor R1 is larger When, it can be connected in series with by multiple resistance, as shown in figure 3, first resistor R1 is gone here and there successively by three resistance (R1a, R1b and R1c) Connection composition；Certainly, in other embodiments, constituting the number of the series resistance of first resistor R1 can rationally set according to actual needs It sets.In order to make microcontroller obtain corresponding voltage value, it is correct send out trigger signal and output obtains predetermined value, as shown in figure 3, the Two resistance R2 are composed in series by variable resistance R2a and fixed resistance R2b.

More convenient in order to adjust, first resistor R1, second resistance R2,3rd resistor R3 and the 4th resistance R4 can be set It is set to variable resistance, such as variable resistance, is adjusted to suitable resistance value by sliding.

In order to filter out the interference of input terminal voltage, input sampling circuit 3, as shown in figure 3, further including input sample filtered electrical Road, input sample filter circuit include input sample filter capacitor CL1 and input sample filter resistance RL1, after the two series connection its Middle one end is connect with the first end of first resistor R1, and the other end is connect with ground wire GND.

Microcontroller 4 is connect with input sampling circuit 3, for generating zero cross fired control according to collected input voltage Signal, and according to input terminal the number of turns of zero cross fired control Signal Regulation auto-transformer 2.

When AC supply voltage increases, the number of turns for increasing auto-transformer armature winding is needed, input and output the number of turns is made Than increasing to keep the stabilization of output voltage；Conversely, when AC supply voltage reduces, it is desirable to reduce auto-transformer primary around The number of turns of group makes input and output turn ratio reduce to keep the stabilization of output voltage.For example, AC power and auto-transformer The V3 connections of third input terminal, i.e., auto transformer input voltage at this time is 220V, output voltage 220V；When the friendship detected When stream supply voltage value is 230V, zero Trig control signal of the zero cross fired control terminal PIN23 outputs of microcontroller 4 is low electricity Zero cross fired branch conducting that is flat, being connected on the second input terminal V2 of auto-transformer so that AC power and auto-transformer The second input terminal V2 connections, increase input the number of turns of auto-transformer, the turn ratio of the input and output of auto-transformer Increase, so that output voltage is not increased with the increase of AC power, keep the stabilization of output voltage.

Above-mentioned contactless alternating current voltage stabilizer, including zero cross fired control circuit, auto-transformer, input sampling circuit and Microcontroller, wherein zero cross fired control circuit is connect with auto-transformer and microcontroller respectively, zero cross fired control circuit packet Include multiple zero cross fired branches；Zero cross fired branch includes silicon-controlled unit and optocoupler unit, the first input end of optocoupler unit It being connect with the first power supply, the zero cross fired control terminal of the second input terminal of optocoupler unit and microcontroller connects, and the of optocoupler unit One output end is connect with the input terminal of silicon-controlled unit, and the second output terminal of optocoupler unit and the control terminal of silicon-controlled unit connect It connects, the input terminal of silicon-controlled unit is connect with AC power, and the output end of silicon-controlled unit and the input terminal of auto-transformer connect It connects；Each input terminal of auto-transformer is connected each zero cross fired branch respectively, and each input terminal and each zero passage of auto-transformer are touched It sends out branch to correspond, output end and the load of auto-transformer connect；Input sampling circuit connects with zero cross fired control circuit It connects, for acquiring input voltage；Microcontroller is connect with input sampling circuit, for being generated according to collected input voltage Zero Trig control signal, and according to input terminal the number of turns of zero cross fired control Signal Regulation auto-transformer.Microcontroller is according to defeated Enter in multiple zero cross fired branches in the variation control zero cross fired control circuit of the collected input voltage of sample circuit One branch conducting, and then change input terminal the number of turns of auto-transformer, ensure the stabilization of output voltage；Microcontroller with it is silicon-controlled Optocoupler unit between unit carries it is possible to prevente effectively from two silicon-controlled units simultaneously turn on when auto-transformer input terminal switches High contactless alternating current voltage stabilizer reliability；Meanwhile protecting against shock delay circuit makes contactless alternating current voltage stabilizer low current start, Further increase reliability.

Silicon-controlled TR is directly impacted when being switched in order to prevent, on the basis of above-mentioned contactless alternating current voltage stabilizer, such as Fig. 2 institutes Show, further include protecting against shock delay circuit 5, connects with AC power, zero cross fired control circuit 1, auto-transformer 2 and microcontroller 4 It connects, the protecting against shock postpones signal control protecting against shock delay circuit 5 for being sent out according to microcontroller 4 and zero cross fired control circuit 1 Or auto-transformer 2 connects.

The input terminal of protecting against shock delay circuit 5 is connect with ac power input end VIN, and the first of protecting against shock delay circuit 5 Output end is connect with the input terminal of each silicon-controlled unit TR in zero cross fired control circuit 1, and the second of protecting against shock delay circuit 5 Output end is connect with any input terminal of auto-transformer 2, and the control terminal of protecting against shock delay circuit 5 is connect with microcontroller 4.

In the present embodiment, protecting against shock delay circuit 5, as shown in Fig. 2, including the first relay J1, the first triode Q1 It is connect with third power vd D3 with the first end of surge resistance RO, the coil of the first relay J1, the line of the first relay J1 The second end of circle is connect with the first end of the first triode Q1, the first contact of the first switch K1 of the first relay J1 and erosion control The first end for hitting resistance RO is connected with AC power, the second contact and the silicon-controlled unit of the first switch K1 of the first relay J1 The input terminal of TR connects, the third contact of the first switch K1 of the first relay J1 and the second end and self coupling of surge resistance RO Any input terminal of transformer 2 connects, and the second end of the first triode Q1 is connect with ground wire GND, the control of the first triode Q1 It holds and is connect with the protecting against shock of microcontroller 4 delay end PIN1.The voltage value of third power vd D3 is set as 12V, certainly, in other realities It applies in example, can rationally be arranged as needed.For the high pressure that back-emf when more preferably controlling the first relay J1 releases generates, keep away Exempt to cause to damage caused by semiconductor devices or interference, as shown in figure 3, protecting against shock delay circuit 5 further includes being connected in parallel in the The first relay protection diode DJ1 on one relay J1 coils, the cathode and first of the first relay protection diode DJ1 The first end of the coil of relay J1 connects, and anode is connect with the second end of the coil of the first relay J1.In order to reduce coil Electric current, reduce calorific value, the extension coil service life, as shown in figure 3, protecting against shock delay circuit 5 further include be connected in series in first after Current-limiting resistance RC between electric appliance J1 coils first end and third power vd D3.In order to ensure that the reliable of the first triode Q1 cuts Only, as shown in figure 3, protecting against shock delay circuit 5 further includes protective resistance RP, the first end of protective resistance RP and the first triode Q1 Control terminal connection, second end connect with ground wire GND.In order to provide suitable voltage to the control terminal of the first triode Q1, such as Shown in Fig. 3, protecting against shock delay circuit 5 further includes the protecting against shock delay for the control terminal and microcontroller 4 for being set to the first triode Q1 Hold the current-limiting resistance RC between PIN1.

To rush of current caused by zero cross fired control circuit 1 when in the present embodiment, in order to reduce circuit start so that Auto-transformer low current starts, the second contact of the first switch K1 of the first relay J1 and the second of auto-transformer 2 defeated Enter V2 is held to connect, the voltage value of the second input terminal V2 is 237V, i.e., the input voltage of auto-transformer on startup is 237V, first High voltage winding low current pre-on is connected, the silicon-controlled work of TR again is connected after safe delay and is adjusted.

In the present embodiment, in order to reduce overall power and protect the products from impact, the first of the first relay J1 opens Pass K1 is normal open switch (normality of the first contact and two contacts is on-state), the first relay in this way after entire circuit start Device J1 is in off-position, and the specific work process of above-mentioned protecting against shock delay circuit 5 is as follows：Contactless alternating current voltage stabilizer is starting Before, the first contact in the first switch K1 of the first relay J1 and the second contact portion, at this point, AC power and self coupling transformation Second input terminal V2 connections of device；In start-up course, postponed by the protecting against shock of the protecting against shock delay end PIN1 outputs of microcontroller 4 Signal is high level, and high level makes the first triode Q1 conductings, with the conducting of the first triode Q1, the first relay J1's Coil obtain it is electric, coil obtain it is electric after so that the first contact and third contact portion, coil obtain it is electric after so that the first contact and third are touched Point connection, AC power are connect with the input terminal of the silicon-controlled unit TR in 8 zero cross fired branches respectively, 4 basis of microcontroller The situation of change of the actually detected input voltage (AC power) arrived generates zero cross fired and controls signal, and zero cross fired controls signal One of those silicon-controlled unit TR conducting is controlled, changes the number of turns of the armature winding of auto-transformer, keeps output voltage Stablize.Above-mentioned preset time is set as 3 seconds in the present embodiment, certainly, in other embodiments, can be reasonable according to actual conditions Setting.

As shown in Fig. 2, contactless alternating current voltage stabilizer further include output sample circuit 6, respectively with the output of auto-transformer 2 End and microcontroller 4 connect, for acquiring output voltage and output voltage being transmitted to microcontroller 4.

In the present embodiment, sample circuit 6 is exported, as shown in Fig. 2, including the 5th resistance R5, the 6th resistance R6, the 7th electricity R7, the 8th resistance R8 and the first end of the second capacitance C2, the 5th resistance R5 and the output end VOUT connections of auto-transformer are hindered, The second end of 5th resistance R5 is connect with the first end of the 6th resistance R6, and the second end of the 6th resistance R6 is connect with ground wire GND, the The first end of six resistance R6 is connect with the first end of the second capacitance C2, the second end of the second capacitance C2 and the second of the 7th resistance R7 End connection, and connect with the first end of the 8th resistance R8, the first end of the 7th resistance R7 is connect with the 4th power vd D4, the 8th electricity The second end of resistance R8 is connect with ground wire GND, and the first end of the 8th resistance R8 connects with the output voltage sampling end PIN3 of microcontroller 4 It connects.By the 5th resistance R5 decompressions, the 6th resistance R6 is met after decompression over the ground, sampled voltage impacts in order to prevent, by the second capacitance Pick-up is isolated in C2, then by the 4th power vd D4, the 7th resistance R7 and the 8th resistance R8, base separates an accurate output voltage of height Sampled signal gives microcontroller 4 and is used as virtual value calculation processing, therefore exports the collected output voltage signal waveform of sample circuit Preferably, the sampling precision for exporting sample circuit is higher so that microcontroller obtained after handling output voltage sampled signal Motor control signal is more accurate, so that the adjusting of output voltage is more quickly, accurately.

Since electrolytic capacitor has, rated capacity is big, capacitance per unit volume amount is big, preparation process is simply and at production cost Low advantage, the second capacitance C2 is electrolytic capacitor, as shown in figure 3, first end of the cathode of electrolytic capacitor as the second capacitance C2 Connect with the first end of the 6th resistance R6, the anode of electrolytic capacitor as the second capacitance C2 second end and the 7th resistance R7 the Two ends connect；Certainly, in other embodiments, the second capacitance C2 may be other types of capacitance, such as tantalum capacitance, according to need Rationally to be arranged.

In the present embodiment, the voltage value of the 4th power vd D4 is 5V, certainly, in other embodiments, or its It is worth, such as 4V or 7V, when the voltage value of the 4th power vd D4 changes, can accordingly adjust the electricity of the 7th resistance R7 and the 8th The resistance value size of R8 is hindered, as long as can ensure that the voltage value of second end output of the 7th resistance R7 and the output voltage of microcontroller are adopted Voltage value needed for the PIN3 of sample end matches.

5th resistance R5 is needed as output voltage dropping resistor by the voltage drop of collected auto-transformer output end Down to suitable range, it can just make collected output voltage and electricity needed for microcontroller on the 6th resistance R6 (sampling resistor) in this way Pressure matching, therefore the 5th resistance R5 needs to bear larger voltage drop, while ensureing that the size of current for flowing through resistance is suitable again, no As for damage device, resistance value may be larger needed for the 5th resistance R5.In this case, when the resistance value of required 5th resistance R5 is larger When, it can be connected in series with by multiple resistance, as shown in figure 3, the 5th resistance R5 is gone here and there successively by three resistance (R5a, R5b and R5c) Connection composition；Certainly, in other embodiments, constituting the number of the series resistance of the 5th resistance R5 can rationally set according to actual needs It sets.In order to make microcontroller obtain corresponding voltage value, it is correct send out trigger signal and output obtains predetermined value, as shown in figure 3, the Six resistance R6 are composed in series by variable resistance R6a and fixed resistance R6b.

More convenient in order to adjust, the 5th resistance R5, the 6th resistance R6, the 7th resistance R7 and the 8th resistance R8 can be set It is set to variable resistance, such as variable resistance, is adjusted to suitable resistance value by sliding.

Above-mentioned contactless alternating current voltage stabilizer further includes current detection circuit 7, respectively with zero cross fired control circuit 1 and singly Piece machine 4 connects, for acquiring input current and input current being transmitted to microcontroller 4.

In the present embodiment, current detection circuit 7, as shown in Fig. 2, including current transformer TA, the 9th resistance R9, the tenth The first side winding of resistance R10, eleventh resistor R11 and third capacitance C3, current transformer TA are connected in series in protecting against shock and prolong The input terminal of slow circuit 5, the secondary side winding of current transformer TA are connected in parallel with the 9th resistance R9, and the first of the 9th resistance R9 End is connect with the first end of third capacitance C3, and the second end of the 9th resistance R9 is connect with ground wire GND, and the first of the tenth resistance R10 End is connect with the 5th power vd D5, the second end of the tenth resistance R10 respectively with the first end of eleventh resistor R11, third capacitance The second end of C3 and the output electric current measure end PIN5 connections of microcontroller 4, second end and the ground wire GND of eleventh resistor R11 Connection, the output end of the first end of eleventh resistor R11 as current detection circuit 7.

Current detection circuit 7, as shown in figure 3, further include current detecting pressure limiting circuit, current detecting pressure limiting circuit includes the One pressure limiting load resistance RV1, the second pressure limiting load resistance RV2, third pressure limiting load resistance RV3 and current detecting filter capacitor CV1 is used, wherein the first pressure limiting load resistance RV1 for preventing open circuit from generating high pressure damage microcontroller and adjusting detection current value First end connect with the first end of the 9th resistance R9, the second end of the first pressure limiting load resistance RV1 is connect with ground wire GND, Two pressure limiting load resistance RV2 and third pressure limiting load resistance RV3 are in parallel with the first pressure limiting load resistance RV1 after being connected in series with to be connected It connects, current detecting filter capacitor CV1 is also connected in parallel with the first pressure limiting load resistance RV1.The voltage value of 5th power vd D5 is set It is set to 5V, certainly, in other embodiments, can be rationally arranged as needed.

Above-mentioned contactless alternating current voltage stabilizer further includes temperature sensing circuit 8, is connected respectively with auto-transformer 2 and microcontroller 4 It connects, temperature is simultaneously transmitted to microcontroller 4 by the temperature for acquiring auto-transformer 2.

In the present embodiment, temperature sensing circuit 8, as shown in Fig. 2, including temperature sensor TT, twelfth resistor R12 and Thirteenth resistor R13, temperature sensor TT are set on auto-transformer 2, the first end of temperature sensor TT and the 6th power supply VDD6 connections, the second end of temperature sensor TT respectively with the first end of twelfth resistor R12 and thirteenth resistor R13 second End connection, the second end of twelfth resistor R12 are connect with ground wire GND, the temperature of the first end and microcontroller 4 of thirteenth resistor R13 Spend test side PIN6 connections.Above-mentioned temperature sensor TT is thermistor, thermocouple or resistance temperature detector etc., according to need Rationally to be arranged.The voltage value of 6th power vd D6 is set as 5V, certainly, in other embodiments, can close as needed Reason setting.

Above-mentioned contactless alternating current voltage stabilizer, further include protection control circuit 9, respectively with the output end of auto-transformer 2 and Microcontroller 4 connects, and the output loop that the protection control signal for being sent out according to microcontroller 4 controls auto-transformer 2 disconnects.When Overcurrent, excess temperature, overvoltage or it is under-voltage when, microcontroller 4 send out protection control signal, protection control signal control auto-transformer it is defeated Go out circuit disconnection.

In the present embodiment, control circuit 9 is protected, as shown in Fig. 2, include the second relay J2 and the second triode Q2, The first end of the coil of second relay J2 is connect with the 7th power vd D7, the second end and second of the coil of the second relay J2 The first end of triode Q2 connects, and the first switch K2 of the second relay J2 is connected in series in the output loop of auto-transformer 2 In, the second end of the second triode Q2 is connect with ground wire GND, and the control terminal of the second triode Q2 is controlled with the protection of microcontroller 4 Signal end PIN2 connections.The voltage value of 7th power vd D7 is set as 12V, certainly, in other embodiments, can close as needed Reason setting.For the high pressure that back-emf when more preferably controlling the release of the second relay generates, avoid causing semiconductor devices or dry Damage caused by disturbing, as shown in figure 3, protection control circuit 9 further includes second be connected in parallel on the second relay J2 coils Relay protection diode DJ2, the first end of the cathode of the second relay protection diode DJ2 and the coil of the second relay J2 Connection, anode are connect with the second end of the coil of the second relay J2.In order to reduce coil current, reduce calorific value, extended line The service life is enclosed, as shown in figure 3, protection control circuit 9 further includes being connected in series in the second relay J2 coils first end and the 7th electricity Current-limiting resistance RC between the VDD7 of source.In order to ensure the reliable cut-off of the second triode Q2, as shown in figure 3, protection control circuit 9 Further include protective resistance RP, the first end of protective resistance RP is connect with the control terminal of the second triode Q2, second end and ground wire GND Connection.In order to provide suitable voltage to the control terminal of the second triode Q2, as shown in figure 3, protection control circuit 9 further includes setting The current-limiting resistance RC being placed between the control terminal of the second triode Q2 and the protection control signal end PIN2 of microcontroller 4.

When output current is more than that the first predetermined current or temperature are electric more than rated output more than preset temperature or output voltage Pressure ± 10% when, microcontroller 4 sends out protection control signal, and the output loop of protection control signal control auto-transformer 2 is disconnected It opens.In the present embodiment, the first predetermined current is set as the 120% of the output-current rating of auto-transformer, preset temperature model It encloses and is set as 85 ± 5 DEG C, if the output-current rating of auto-transformer is 1A, then the first predetermined current is 1.2A；Rated output Voltage is 220V, then realizes that overvoltage protection, output voltage realize under-voltage protection when being less than 198V when output voltage is higher than 242V.On State protection control circuit 9 specific work process be：When the output current detected is more than that the first predetermined current or temperature are super (the also other norm controllings of predeterminable value certainly) when preset temperature or output voltage are more than ± the 10% of rated output voltage are crossed, singly The protection control signal that the protection control signal end PIN2 of piece machine 4 is sent out is low level, the second triode Q2 cut-offs, the second relay The coil losing electricity of device J2, the first switch K2 of the second relay J2 is transformed to disconnect shape by original closed state after coil losing electricity State, and then output loop is made to disconnect, play the role of overcurrent, excess temperature, overvoltage and under-voltage protection to auto-transformer.

Above-mentioned contactless alternating current voltage stabilizer further includes draught fan control circuit 10, is connect with microcontroller 4, for according to monolithic The air-blower control signal that machine 4 is sent out controls wind turbine.When output current is more than the second predetermined current, microcontroller 4 sends out wind turbine control Signal processed, air-blower control signal control wind turbine, and wind turbine is used for the cooling of auto-transformer.

In the present embodiment, draught fan control circuit 10, as shown in Fig. 2, including third transistor Q3 and wind turbine DF, the three or three The control terminal of pole pipe Q3 is connect with the air-blower control signal end PIN13 of microcontroller 4, first end and the wind turbine DF of third transistor Q3 First end connection, the second end of third transistor Q3 connect with ground wire GND, the second end of wind turbine DF and the 8th power vd D8 companies It connects.In order to ensure the reliable cut-off of third transistor Q3, as shown in figure 3, draught fan control circuit 10 further includes protective resistance RP, protect The first end of shield resistance RP is connect with the control terminal of third transistor Q3, and second end is connect with ground wire GND.In order to give the three or three pole The control terminal of pipe Q3 provides suitable voltage, as shown in figure 3, draught fan control circuit 10 further includes being set to third transistor Q3 Current-limiting resistance RC between control terminal and the air-blower control signal end PIN13 of microcontroller 4.In order to protect wind turbine, as shown in figure 3, Draught fan control circuit 10 further includes the current-limiting resistance RC being set between wind turbine DF second ends and the 8th power vd D8.

In the present embodiment, the second predetermined current is set as the 40% of the rated current of auto-transformer, such as self coupling transformation The rated current of device is 1A, then the second predetermined current is 0.4A, when electric current is more than the second predetermined current, the wind turbine of microcontroller 4 Control signal end PIN13 sends out air-blower control signal, and air-blower control signal is high level, and high level control third transistor Q3 is led Logical, the conducting of third transistor Q3 makes the circuit conducting of wind turbine place, and wind turbine starts to rotate, and then reduces the temperature of auto-transformer It rises, ensures that the Wen Sheng of auto-transformer meets defined limit of temperature rise.

Above-mentioned contactless alternating current voltage stabilizer, as shown in Fig. 2, further include warning device 11, the controlling alarm end with microcontroller 4 PIN7 connections, the alert when AC voltage regulator equipment output overvoltage occurs, exports under-voltage, excess temperature or overload.At this In embodiment, as shown in figure 3, warning device 11 is buzzer FM, one end and the controlling alarm end PIN7 of buzzer FM, the other end It is connect with the 9th power vd D9；Certainly, in other embodiments, or audible-visual annunciator etc., as needed rationally setting ?.

Above-mentioned contactless alternating current voltage stabilizer, as shown in figure 3, further include input circuit switch K3, when input current is more than the When three predetermined currents, by the cut-off accesses between AC power and auto-transformer of input circuit switch K3, ensure self coupling Transformer is without damage.In the present embodiment, third predetermined current is set as the specified input current of auto-transformer 120%, if the specified input current of auto-transformer is 2A, then third predetermined current is 2.4A；Certainly, in other embodiments In, the value of third predetermined current can be rationally arranged according to actual needs.

Above-mentioned contactless alternating current voltage stabilizer, as shown in Fig. 2, further include display unit 12, the display control end with microcontroller 4 Connection, for showing：Input voltage, output voltage, load current, and delay, work, temperature, under-voltage, over-pressed, protection shape State shows that display unit 12 can be that LED is shown or LCD is shown, as needed rationally setting.In the present embodiment In, as shown in figure 3, the display control end of microcontroller 4 is PIN8, PIN9 and PIN10；Certainly, in other embodiments, display control The number and display unit 12 and the connection pin of microcontroller 4 at end processed can be rationally arranged according to the needs of display unit 12.

Above-mentioned contactless alternating current voltage stabilizer further includes steady pressure of system power supply circuit 13, connect, be used for auto-transformer 2 Power supply needed for AC voltage regulator is provided.

In the present embodiment, steady pressure of system power supply circuit 13, as shown in Fig. 2, including full-bridge rectification BR, zener diode ZD1, the 4th triode Q4, three end adjustable shunt reference source U, the 14th resistance R14 and the 15th resistance R15, full-bridge rectification BR Input terminal and auto-transformer secondary coil connect, the moon of the first output end and zener diode ZD1 of full-bridge rectification BR Pole connects, and the second output terminal of full-bridge rectification BR is connect with ground wire GND, and the anode of zener diode ZD1 is connect with ground wire GND, The first end of 4th triode Q4 is connect with the first output end of full-bridge rectification BR, the second end and the 14th of the 4th triode Q4 The first end of resistance R14 connects, and the control terminal of the 4th triode Q4 is connect with the cathode of three end adjustable shunt reference source U, three ends The reference pole of adjustable shunt reference source U connects with the second end of the 14th resistance R14 and the first end of the 15th resistance R15 respectively It connects, the anode of three end adjustable shunt reference source U is connect with the second end of the 15th resistance R15 and ground wire GND respectively.Steady pressure of system Two reference voltages are arranged, as shown in Fig. 2, voltage stabilizing two in system power supply unit of the power supply circuit 13 as entire AC voltage regulator The first end that the cathode of pole pipe ZD1 exports the first reference voltage V REF1, the 14th resistance R14 exports the second reference voltage VREF2.As shown in figure 3, the voltage value of the first reference voltage V REF1 is+12V, the voltage value of the second reference voltage V REF2 is+ 5V, therefore the first reference voltage V REF1 can be used as needed for third power vd D3, the 7th power vd D7 and the 8th power vd D8 offers 12V voltages, the second reference voltage V REF3 can be the first power vd D1, second source VDD2, the 4th power vd D4, the 5th electricity Source VDD5, the 6th power vd D6, the 9th power vd D9 and microcontroller provide required 5V voltages；Certainly, in other embodiments In, reference voltage output number and voltage value can be rationally arranged as needed.Change the reference value of three end adjustable shunt reference source U The output voltage values of changeable second reference voltage V REF2, form high-accuracy serial regulating circuit, are provided to microcontroller high-accuracy Source of stable pressure.

In the present embodiment, on the basis of above system voltage stabilizing power supplying circuit 13, in order to ensure steady pressure of system power supply electricity The stabilization of 13 output voltage of road, as shown in figure 3, steady pressure of system power supply circuit 13 further include steady pressure of system power supply filter circuit, be Voltage stabilizing power supply filter circuit of uniting includes the first filter capacitor CL2 and the second filter capacitor CL3 being connected in parallel, wherein the first filter Wave capacitance CL2 is electrolytic capacitor, and the second filter capacitor CL3 is fixed capacity.Steady pressure of system power supply filter circuit is set to full-bridge Between the first output end and ground wire GND of rectification BR, it is also provided between the second end and ground wire GND of the 4th triode Q4.

In the present embodiment, on the basis of above system voltage stabilizing power supplying circuit 13, for the SCM system of core Normal operation provides high-accuracy source of stable pressure to microcontroller, as shown in figure 3, steady pressure of system power supply circuit 13 further includes the first filter Wave circuit, the first filter circuit include the first filter resistance RL2 and third filter capacitor CL4, and the first filter resistance RL2 parallel connections connect It is connected between the first end and the control terminal of the 4th triode Q4 of the 4th triode Q4, third filter capacitor CL4 is connected in parallel in Between the anode of three end adjustable shunt reference source U and the reference pole of three end adjustable shunt reference source U.First filter resistance RL2 is held By 1/2 average voltage, while ensureing that the size of current for flowing through resistance is suitable again, is unlikely to damage device, the first filter resistance The resistance value of RL2 and the 14th resistance R14 are the same.It in this case, can when the resistance value of required first filter resistance RL2 is larger It is logical to change resistance value to adjust required voltage.

Output exchange twin voltage is isolated by variac, rectified bridge rectification, whole is forward dc voltage, through electricity After solving capacitance, fixed capacity filtering, then by ZD1 voltage-stablizer pipe voltage stabilizings, will output DC voltage stability in required value range, to AC transformer system provides stable DC source.After above-mentioned steady pressure treatment, the 4th triode Q4, three end adjustable shunt bases Quasi- source U, R14, R15 resistance, forms high-accuracy serial regulating circuit, through fixed capacity, electrolytic capacitor filtering after, to microcontroller, Current detection circuit and warning circuit etc. provide high-accuracy regulated power supply.

Obviously, the above embodiments are merely examples for clarifying the description, and does not limit the embodiments.It is right For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or It changes.There is no necessity and possibility to exhaust all the enbodiments.And thus amplify out it is obvious variation or Among the protection domain that variation is created still in the utility model.

Claims (10)

1. a kind of contactless alternating current voltage stabilizer, which is characterized in that adopted including zero cross fired control circuit, auto-transformer, input Sample circuit and microcontroller, wherein

The zero cross fired control circuit, connect with the auto-transformer and the microcontroller respectively, the zero cross fired control Circuit processed includes multiple zero cross fired branches；The zero cross fired branch includes silicon-controlled unit and optocoupler unit, the optocoupler The first input end of unit is connect with the first power supply, the zero cross fired of the second input terminal and the microcontroller of the optocoupler unit Control terminal connects, and the first output end of the optocoupler unit is connect with the input terminal of the silicon-controlled unit, the optocoupler unit Second output terminal connect with the control terminal of the silicon-controlled unit, the input terminal of the silicon-controlled unit connects with AC power It connects, the output end of the silicon-controlled unit is connect with the input terminal of the auto-transformer；

Each input terminal of the auto-transformer is connected each zero cross fired branch respectively, each input of the auto-transformer End is corresponded with each zero cross fired branch, and output end and the load of the auto-transformer connect；

The input sampling circuit is connect with the zero cross fired control circuit, for acquiring input voltage；

The microcontroller is connect with the input sampling circuit, is touched for generating zero passage according to the collected input voltage Hair control signal, and according to input terminal the number of turns of auto-transformer described in zero cross fired control Signal Regulation.

2. contactless alternating current voltage stabilizer according to claim 1, which is characterized in that the input sampling circuit includes first Resistance, second resistance, 3rd resistor, the 4th resistance and the first capacitance, the first end of the first resistor with it is described silicon-controlled The input terminal of unit connects, and the second end of the first resistor is connect with the first end of the second resistance, the second resistance Second end connect with ground wire, the first end of the second resistance is connect with the first end of first capacitance, it is described first electricity The second end of appearance is connect with the second end of the 3rd resistor, and is connect with the first end of the 4th resistance, the third electricity The first end of resistance is connect with second source, and the second end of the 4th resistance is connect with ground wire, the first end of the 4th resistance It is connect with the input voltage sampling end of the microcontroller.

3. contactless alternating current voltage stabilizer according to claim 1, which is characterized in that further include protecting against shock delay circuit, with AC power, the zero cross fired control circuit, the auto-transformer are connected with the microcontroller, for according to the monolithic The protecting against shock postpones signal that machine is sent out controls the protecting against shock delay circuit and the zero cross fired control circuit or self coupling transformation Device connects.

4. contactless alternating current voltage stabilizer according to claim 3, which is characterized in that the input of the protecting against shock delay circuit End is connect with AC power, and the first output end of the protecting against shock delay circuit is connect with the zero cross fired control circuit, institute The second output terminal for stating protecting against shock delay circuit is connect with the auto-transformer, the control terminal of the protecting against shock delay circuit with Microcontroller connection, the protecting against shock delay circuit include the first relay, the first triode and surge resistance, and described the The first end of the coil of one relay is connect with third power supply, the second end of the coil of first relay and the described 1st The first end of pole pipe connects, the first contact of the first switch of first relay and the first end of the surge resistance and AC power connects, and the second contact of the first switch is connect with the input terminal of the silicon-controlled unit, the first switch Third contact connect with any input terminal of the second end of the surge resistance and the auto-transformer, the described 1st The second end of pole pipe is connect with ground wire, and the control terminal of first triode is connect with the protecting against shock of microcontroller delay end.

5. according to any contactless alternating current voltage stabilizers of claim 1-4, which is characterized in that further include output sampling electricity Road is connect with the output end of the auto-transformer and the microcontroller respectively, for acquiring output voltage and by the output Voltage is transmitted to the microcontroller.

6. according to any contactless alternating current voltage stabilizers of claim 1-4, which is characterized in that further include current detecting electricity Road is connect with the zero cross fired control circuit and the microcontroller respectively, for acquire input current and by the input electricity It is streamed to the microcontroller.

7. according to any contactless alternating current voltage stabilizers of claim 1-4, which is characterized in that further include temperature detection electricity Road is connect with the auto-transformer and the microcontroller respectively, and the temperature for acquiring the auto-transformer simultaneously will be described Temperature is transmitted to the microcontroller.

8. according to any contactless alternating current voltage stabilizers of claim 1-4, which is characterized in that further include protection control electricity Road is connect with the output end of the auto-transformer and the microcontroller respectively, the protection for being sent out according to the microcontroller The output loop that control signal controls the auto-transformer disconnects.

9. according to any contactless alternating current voltage stabilizers of claim 1-4, which is characterized in that further include air-blower control electricity Road is connect with the microcontroller, and the air-blower control signal for being sent out according to the microcontroller controls wind turbine.

10. according to any contactless alternating current voltage stabilizers of claim 1-4, which is characterized in that further include that steady pressure of system supplies Circuit is connect with the auto-transformer, for providing power supply needed for contactless alternating current voltage stabilizer.