CN100514819C

CN100514819C - Cutting control AC voltage adjusting circuit and its application

Info

Publication number: CN100514819C
Application number: CNB2007101375828A
Authority: CN
Inventors: 龚秋声
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-08-09
Filing date: 2007-08-09
Publication date: 2009-07-15
Anticipated expiration: 2027-08-09
Also published as: CN101123401A

Abstract

The invention belongs to the technical field of electric power and electronics, and relates to a chopping control AC voltage regulation circuit, which consists of a master switch (S1) consisting of an AC power supply, a full-control component and a diode, a continuous current switch (S2) consisting of a unidirectional silicon controlled rectifier, a high-frequency transformer (B) and a trigger control circuit. The invention is characterized in that the full-control component is used as the bidirectional master switch (S1); the unidirectional silicon controlled rectifier is used as the bidirectional continuous current switch (S2). The high-frequency transformer is used for isolation and power output. The invention is widely used for DC power supplies, such as power supplies of AC and DC voltage regulation regulators, welding machines, chargers, electrolysis, electroplate and electrification. The invention has the advantages of small harmonic waves, high power factors, no energy points, compactness, small weight, saving energy, and saving material and so on, and is a basic unit circuit making use of chopping control AC voltage regulation technology to transform traditional industry and products, and has excellent economic and social benefit.

Description

Cutting control AC voltage regulation of voltage regulation circuit and application thereof

[one] technical field

The present invention relates to cutting control AC voltage adjusting circuit, relating in particular to high frequency transformer is load, is two-way master switch by full control device, and the half control device is the cutting control AC voltage adjusting circuit of two-way continued flow switch and the product of using this circuit design and manufacturing.

[two] background technology

The AC voltage adjusting circuit that existing controllable devices is formed only has two big classes: the first kind is to use the phase control type ac regulating circuit of half control device composition such as controllable silicon; Second class is to use GTR, IGBT to control the cutting control AC voltage adjusting circuit that device is formed entirely.Master control bidirectional switch in the existing cutting control AC voltage adjusting circuit and afterflow bidirectional switch all are to use full control device and rectifier diode to form, from the books such as power electronic technology basis that colleges and universities' power electronic technology textbook and China Machine Press publish as can be known, single-phase cutting control AC voltage adjusting circuit only has three kinds of circuit, and their master switch and continued flow switch all are to use full control device and rectifier diode to form.2 full control devices that the inventor finds to be used as the circuit afterflow device when analyzing cutting control AC voltage adjusting circuit incomplementarity working method are to use cheap high frequency thristor to substitute.So just invented master switch with controlling device entirely, continued flow switch half control device, load is the novel chopper-control hybrid device AC voltage adjusting circuit of high frequency transformer, because it is identical withstand voltage more much lower than full control device price with controllable silicon same current, therefore, use the design of this cutting control AC voltage adjusting circuit and the various product made can reduce cost and produces favorable economic benefit.Cutting control AC voltage adjusting circuit also should increase naturally in the textbook the hybrid device cutting control AC voltage adjusting circuit, and should be the circuit of emphasis teaching.

The domestic and international at present alternating current steady voltage plug of producing, in automatic adjusting power frequency autotransformer mode, high power AC stabilized voltage power supply particularly, constantly the someone proposed to use the switch change-over technology to get rid of carbon brush and Industrial Frequency Transformer in the alternating current steady voltage plug in recent years, made alternating current steady voltage plug move towards contactless, no industrial frequency transformer, volume is little, in light weight, performance is good of new generation compensation switch AC stabilized voltage power supply.Compensation stabilized voltage power supply one literary composition of electrotechnics magazine the 6th interim alternating-current switch in 1999 proposes the useful exploration article of this class, and has applied for patent protection power.But this technical scheme critical path is crossed secondary rectification circuit and secondary switch translation circuit.Circuit structure complexity, cost are also higher, are unfavorable for promoting

The hybrid device chopper-control switch AC regulating circuit that the inventor uses band high frequency transformer of the present invention designs this class compensation-type alternating current stream pressurizer just can make circuit greatly simplify low cost of manufacture. therefore, DEVELOPMENT PROSPECT is widely arranged.

Existing A.C. welder is based on moving-iron type, moving-coil type and tapped, and they all need the Industrial Frequency Transformer of 1 big Heavy Weight of volume, and needs to regulate welding current with mechanical regulation method.The hybrid device cutting control AC voltage adjusting circuit of using band high frequency transformer of the present invention just can be realized the A.C. welder of new generation of no industrial frequency transformer, electrical adjustment.

Existing switching regulator DC power supply all is to use, earlier with civil power through bridge rectifier, the filtering in parallel of big electric capacity obtains DC power supply earlier, uses half-bridge, full-bridge again, and inverter circuit single-ended or the band centre-tapped transformer obtains after the high frequency again that rectifying and wave-filtering obtains needed electric current and voltage.Use hybrid device cutting control AC voltage adjusting circuit of the present invention, just can use simpler method to realize, and the comparable said method of power factor is high a lot.

[three] summary of the invention

First purpose is that designing a kind of is load with the high-frequency isolation transformer, and the master control bidirectional switch uses full control device, and the afterflow bidirectional switch uses silicon controlled novelty cutting control AC voltage adjusting circuit.Second purpose be use novel cutting control AC voltage adjusting circuit design new cut the control compensating-type AC voltage stabilization power circuit.The 3rd purpose is to use novel cutting control AC voltage adjusting circuit cutting control AC electric welding machine novel in design. the 4th purpose is to use chopper-control charging, plating, the electrification that novel chopper-control switch AC regulating circuit designs various no industrial frequency transformers,, DC power supply such as electrolysis.

Cutting control AC voltage adjusting circuit of the present invention, it is by AC power, full control device, one-way SCR, rectifier diode, high frequency transformer and control circuit are formed, control circuit is the make-to-break ratio that is used for controlling full control device, conducting with one-way SCR, it is characterized in that: cutting control AC voltage adjusting circuit is controlled devices and 2 two-way master switches (S1) that rectifier diode is formed by 1 entirely by 2, wherein control the device differential concatenations entirely for 2, on 2 rectifier diode difference reverse parallel connection to 2 full control devices, perhaps control device and 4 two-way master switches (S1) that rectifier diode is formed entirely by 1 by 1, the wherein second series arm parallel connection that is in series of first series arm that is in series of 2 rectifier diode negative electrodes and other 2 rectifier diode anodes, 1 full control device is connected between the tie point of the tie point of 2 rectifier diodes in first series arm and other 2 rectifier diodes in second series arm, the two ends of two-way master switch (S1) are connected between the end (3) of elementary winding (W1) of an input of AC power (1) and high frequency transformer (B), another input (2) of the other end of elementary winding (W1) and AC power is connected, also have 1 two-way continued flow switch of being made up of 2 one-way SCRs in parallel (S2) in the other direction, the elementary winding (W1) of its two ends and high frequency transformer (B) is in parallel.

The control compensating-type AC voltage stabilization power circuit of cutting of the present invention, it by AC power, control device, one-way SCR, rectifier diode, high frequency transformer, LC high-frequency filter circuit and trigger control circuit entirely and form, it is characterized in that: cutting control AC voltage adjusting circuit, the secondary output of being made up of a hybrid switch device of high frequency transformer (B) obtains the voltage with the AC power same frequency behind the LC High frequency filter, (recently regulate by the break-make of (S1) by master switch for its voltage swing.It and AC power equidirectional, perhaps rightabout is in series and just can compensates the reduction of AC power, perhaps raises to reach the purpose of regulated output voltage.Alternating current steady voltage plug of the present invention just can be realized voltage stabilizing as long as regulate the make-to-break ratio of master switch (S1) automatically.It has the power factor height, circuit is simple, volume is little, in light weight, cost is low, energy-conservation and characteristics of high efficiency, is the renewal product of alternating current steady voltage plug.

Cutting control AC electric welding machine of the present invention, it by AC power, control device, one-way SCR, rectifier diode, high frequency transformer, High frequency filter inductance and trigger control circuit entirely and form, it is characterized in that; By the cutting control AC voltage adjusting circuit that a hybrid switch device is formed, there is a filter inductance (L) to be serially connected in the electric loop of welding, regulate the size that control circuit makes two-way master switch (S1) break-make ratio just can regulate welding current, it is little that it has a volume, in light weight, easy to adjust, etc. advantage.

Chopper-control DC power supply of the present invention, it by AC power, control device, one-way SCR, rectifier diode, high frequency transformer, high-frequency filter circuit and trigger control circuit entirely and form, it is characterized in that; The cutting control AC voltage adjusting circuit of forming by a hybrid switch device, high frequency transformer (B) secondary winding output voltage directly obtains required DC power supply after high-frequency rectification and filtering, regulate the make-to-break ratio of master switch (S1) by control circuit and just can regulate output voltage, advantages such as it has the power factor height, and Harmonics of Input is little.

Just can further understand a plurality of purpose of the present invention by description of drawings, and feature of the present invention and advantage etc.

[four] description of drawings

Accompanying drawing 1 is a hybrid device cutting control AC voltage adjusting circuit main circuit diagram of the present invention.

Accompanying drawing 2 is embodiment main circuit diagrams that the present invention uses aspect the cutting control AC electric welding machine.

Accompanying drawing 3 is embodiment main circuit diagrams that the present invention uses aspect the chopper-control DC power supply.

Accompanying drawing 4 is the present invention's embodiment main circuit diagrams on compensation switch AC stabilized voltage power supply.

[five] embodiment accompanying drawing 1 (a) and (b) 2 kinds of cutting control AC voltage adjusting circuit main circuits of the present invention are shown, their difference just is: (a) be to use 2 full control device V1, V2 and 2 rectifier diode D1, D2 to form two-way master switch S1, and (b) being to use 1 full control device V1 and 4 rectifier diode D1～D4 to form two-way master switch S1, accompanying drawing 1 (a) and two-way continued flow switch S2 (b) are made up of the one-way SCR V3 and the V4 of 2 reverse parallel connections.Master switch S1 is an end 3 that is connected in input of AC power 1 and the elementary winding W1 of high frequency transformer B.Continued flow switch S2 is that the elementary winding W1 with high frequency transformer B is in parallel.

1 two main circuit diagram operation principles of accompanying drawing are identical, be that example is described as follows now: in the positive half period of AC supply voltage with accompanying drawing 1 (a), [promptly 1 for just, 2 for during negative], one-way SCR V4 is plus signal not, under the one-way SCR V3 plus signal situation: when the V1 plus signal makes its conducting, primary winding W1 electric current flows to 2 by 3, this moment, V3 bore back-pressure and can not conducting, when cutting off the V1 signal, elementary winding W1 will produce reverse potential and make V3 bear the forward voltage conducting and play the afterflow effect.[promptly 1 for negative in the negative half period of AC supply voltage, 2 for during just], one-way SCR V3 is plus signal not, under the one-way SCR V4 plus signal situation: when the V2 plus signal makes its conducting, primary winding W1 electric current flows to 3 by 2, this moment, V4 bore reverse voltage and can not conducting, and when cutting off the V2 signal, elementary winding makes the V4 conducting and plays the afterflow effect with regard to producing back-emf.Therefore, when V1 and V2 added pulse control signal, high frequency transformer B was subjected to the pulse voltage of AC power modulation with regard to output amplitude.This voltage just can obtain the voltage with the AC power same frequency after filtering, and its size can be regulated output voltage by regulating the control signal pulsewidth.

Accompanying drawing 2 is the cutting control AC voltage adjusting circuits that adopt accompanying drawing 1 (b), the embodiment main circuit diagram on the cutting control AC electric welding machine.It is made up of cutting control AC voltage adjusting circuit and filter circuit, it is characterized in that; Have in the welding circuit of B level of a hybrid device cutting control AC voltage adjusting circuit and high frequency transformer and be serially connected with a filter inductance L.By the filtering of filter inductance, just and generally AC welding set is similar for the electric current of welding circuit, reduces Harmonics of Input in order to improve power factor, and can import two ends in AC power increases the L1C1 filter circuit.Because welding current is by the pulsewidth of regulating control circuit the V1 make-to-break ratio to be changed to regulate, and therefore also can realize the automatic feedback control of welding circuit electric current, realizes the superior weldability energy such as influence that the welding current size is not changed by supply power voltage.Advantages such as therefore it has no industrial frequency transformer, does not have machinery and regulates, and volume is little, and is in light weight, and power factor height, energy-saving material-saving and welding current are stable, it is the renewal product of existing A.C. welder, has very big market prospects and economic and social benefits.

Accompanying drawing 3 is the cutting control AC voltage adjusting circuits that adopt accompanying drawing 1 (b), the embodiment main circuit diagram aspect the chopper-control DC power supply.It is made up of cutting control AC voltage adjusting circuit and current rectifying and wave filtering circuit, it is characterized in that; There are a hybrid device cutting control AC voltage adjusting circuit and high frequency transformer B secondary winding to be connected with high-frequency rectification and filter circuit, by rectification circuit the high frequency transformer secondary voltage is rectified into unidirectional voltage, obtains required direct voltage through the filtering of LC high frequency filter again.Can the V1 make-to-break ratio be changed and regulate direct voltage,, regulate the control signal pulsewidth automatically and realize the stable of output voltage by the negative anti-fermium of voltage-regulation voltage-stabilization output voltage.For the harmonic current that reduces AC power can increase a high frequency L1C1 filter at the input of chopper-control regulating circuit.

Use this technical scheme to obtain DC power supply and will exchanging earlier of using at present through bridge rectifier and the needed direct voltage of the United Nations General Assembly's capacitor filtering acquisition inversion also, obtain high frequency bidirectional pulse voltage with inversion then, obtain DC power supply and compare with the isolation of high frequency change device, step-down, rectifying and wave-filtering more at last, not only circuit is simple, cost is low, and the power factor height, harmonic wave is low.

Accompanying drawing 4 is cutting control AC voltage adjusting circuits of accompanying drawing 1 (b), and at an embodiment main circuit diagram of cutting aspect the control compensating-type AC voltage stabilization power supply, it is made up of cutting control AC voltage adjusting circuit, high-frequency filter circuit and two-way electronic commutator, it is characterized in that; A hybrid device cutting control AC voltage adjusting circuit and high frequency LC filter circuit are arranged.The voltage of high frequency transformer secondary winding is through LC filtering, the voltage U c that obtains on capacitor C is exactly the forward with the AC power same frequency, or reverse sinusoidal voltage, its voltage swing can make the make-to-break ratio of V1 change again by the pulsewidth of control signal to come the regulation voltage size.When Uc and equidirectional being in series of AC supply voltage just can just compensate AC power, realize the adjustable output of boosting.Just can to AC power bear compensation when Uc and AC supply voltage are in series in the other direction, realize adjustable step-down output.When using the negative feedback of pressure regulation output voltage signal full control device V1 in the master switch and the make-to-break ratio of V2 to be changed to control signal, just can realize city's electric boost voltage stabilizing, or civil power lowering and stabilizing blood pressure power supply.

Accompanying drawing 4 is to use high frequency transformer B, 2 secondary winding W2, W3 and 2 bidirectional electronic switch S3, S4 are used for changing automatically output W2, or the high frequency voltage of W3, the Uc voltage through obtaining on the capacitor C after the LC filtering is serially connected between the output of input of AC power and voltage-regulation voltage-stabilization power supply just can realize cutting control compensating-type AC pressure regulation and voltage stabilizing.For minimizing is cut the control AC voltage adjusting to the distortion of AC power electric current, can between AC power and cutting control AC voltage adjusting circuit, be connected in series high frequency L1C1 filter circuit.By accompanying drawing 4 as can be seen the technical scheme of this alternating current steady voltage plug have; No industrial frequency transformer, nothing are handed over tool contact, advantages such as volume is little, in light weight, cost is low, energy-saving material-saving.

Manufacturing and designing of single-phase and three-phase step-down economize on electricity alternating current steady voltage plug can be removed 2 bidirectional electronic switch S3, S4 and secondary winding W3 in the accompanying drawing 4.Manufacturing and designing of the alternating current steady voltage plug that boosts in low-voltage area can be removed 2 bidirectional electronic switch S3, S4 and secondary winding W2 in the accompanying drawing 4.Manufacturing and designing of the alternating current steady voltage plug that should step-down boosts again, except that using accompanying drawing 4 main circuit diagrams, also can only use the alternate manner of 1 secondary winding of high frequency transformer B, for example: mode that buck control can use that double-pole dibit Electromechanical Control mode or double-pole on-off switch are controlled etc.

Claims

1, a kind of cutting control AC voltage adjusting circuit, it is by AC power, full control device, one-way SCR, rectifier diode, high frequency transformer and control circuit are formed, control circuit is the make-to-break ratio that is used for controlling full control device, conducting with one-way SCR, it is characterized in that: cutting control AC voltage adjusting circuit is controlled devices and 2 two-way master switches (S1) that rectifier diode is formed by 1 entirely by 2, wherein control the device differential concatenations entirely for 2, on 2 rectifier diode difference reverse parallel connection to 2 full control devices, perhaps control device and 4 two-way master switches (S1) that rectifier diode is formed entirely by 1 by 1, the wherein second series arm parallel connection that is in series of first series arm that is in series of 2 rectifier diode negative electrodes and other 2 rectifier diode anodes, 1 full control device is connected between the tie point of the tie point of 2 rectifier diodes in first series arm and other 2 rectifier diodes in second series arm, the two ends of two-way master switch (S1) are connected between the end (3) of elementary winding (W1) of an input of AC power (1) and high frequency transformer (B), another input (2) of the other end of elementary winding (W1) and AC power is connected, also have 1 two-way continued flow switch of being made up of 2 one-way SCRs in parallel (S2) in the other direction, the elementary winding (W1) of its two ends and high frequency transformer (B) is in parallel.

2, a kind of cutting control AC electric welding machine, it is made up of described cutting control AC voltage adjusting circuit of claim 1 and High frequency filter inductance (L), it is characterized in that: High frequency filter inductance (L) is connected in secondary output winding of high frequency transformer (B) (W2) and the output welding circuit, regulates the make-to-break ratio of master switch (S1) by control circuit and regulates welding current.

3, a kind of control compensating-type AC voltage stabilization power supply of cutting, it is made up of described cutting control AC voltage adjusting circuit of claim 1 and high frequency LC (LC) filter circuit, it is characterized in that: the alternating voltage that the voltage of the secondary output winding of high frequency transformer (B) obtains after the filtering of high frequency LC (LC) filter circuit is identical with the frequency of AC power, its size is decided by the make-to-break ratio of master switch (S1), it and AC supply voltage equidirectional, perhaps rightabout is in series and just can compensates the reduction of AC power, and perhaps the voltage of Sheng Gaoing reaches the purpose of stablizing output AC voltage.

4, a kind of chopper-control DC power supply, it is made up of described cutting control AC voltage adjusting circuit of claim 1 and rectifier filter circuit, it is characterized in that: the secondary output winding voltage of high frequency transformer (B) just obtains required DC power supply after high-frequency rectification and filtering.