CN101834063A - Pulse drive transformer assembly for self-excited switching power supply converter - Google Patents

Abstract

The invention discloses a pulse drive transformer assembly for a self-excited switching power supply converter. The pulse drive transformer assembly (3) provides a drive signal for a power electronic switch assembly (Sk) in the self-excited switching power supply converter. By adopting a magnetic amplifier technology or a quadrature transformer technology, the power electronic switch assembly (Sk) driven by the pulse drive transformer assembly can normally work under an extremely-high amplitude direct current pulse power supply, so that the self-excited switching power supply converter finishes the filtering of a power supply alternating current input side of a commercial power grid without an electrolytic capacitor and generally meets the requirement without a power factor compensation (PFC). With the magnetic coupling current negative feedback action, the performance of the power electronic switch assembly (Sk) driven by the pulse drive transformer assembly is remarkably improved and the reliability of the complete machine can be improved. The invention has the advantages of low cost and high reliability and especially has remarkable benefits to energy-saving lamps and electronic ballasts.

Description

A kind of pulse drive transformer assembly that is used for self-excited switching power supply converter

Technical field under in the of 1

What the present invention relates to is a kind of pulse drive transformer assembly that is used for self-excited switching power supply converter, the general utility functions of this pulse drive transformer assembly (3) are: finish the necessary positive feedback of self-oscillation in the magnetic coupling mode, and provide appropriate driving signal for the power electronic switching assembly (Sk) in the power switch topological structure unit (2) of self-excited switching power supply converter (k is the sequence number of the power electronic switching assembly represented of Arabic numerals, down with).Owing to adopted the magnetic amplifier technology, perhaps quadrature transformer technology, make the power electronic switching assembly (Sk) that driven by this pulse drive transformer assembly (3) can be when violent dc pulse power supply power supply operate as normal, so self-excited switching power supply converter need not to finish the filtering that the power supply that connects utility grid exchanges input side with electrolytic capacitor.Thereby make the input current of self-excited switching power supply converter can not produce serious wave distortion, need not power factor compensation (PFC) usually.Because " magnetic coupling Current Negative Three-Point Capacitance " effect makes the power switch transistor that is driven by this pulse drive transformer assembly drive appropriately, the reliability of self-excited switching power supply converter is promoted.And because circuit is simple, magnetic device is reliability and durability, so the present invention has low-cost and highly reliable advantage, and is especially remarkable to electricity-saving lamp and electric ballast beneficial effect.

In order to distinguish mutually, be novel self-excited switching power supply converter with the self-excited switching power supply converter of calling in the following text among the present invention with background technology.This specification agreement: x is the magnetic core sequence number that English alphabet is represented; N is the coil sequence number that Arabic numerals are represented; K is the sequence number of the power electronic switching assembly represented of Arabic numerals.

2 background technologies

2.1 the background technology of self-excited switching power supply converter

The design core that the present invention is different from prior art is to have adopted magnetic amplifier, perhaps the quadrature transformer technology.Because this technology is inseparable with self-excited switching power supply converter.Therefore be necessary the background technology of self-excited switching power supply converter is illustrated.

Indication self-excited switching power supply converter of the present invention, by AC power input unit (1), power switch topological structure unit (2), pulse drive transformer assembly unit (3), and control unit (4), power output branch units (5) is formed, referring to Fig. 1.Wherein:

AC power input unit (1) comprising: rectification, filtering, the Electromagnetic Compatibility circuit can also comprise power-factor compensator (PFC).Power switch topological structure unit (2) can include: full-bridge type, perhaps semibridge system or push-pull power switch circuit topology form.Pulse drive transformer assembly unit (3), in input coil (Nxin, this is the primary coil of this pulsed drive transformer), output winding (Nxon, this is the secondary coil of this pulsed drive transformer) are arranged, (Sk) provides driving for the power electronic switching assembly, sees for details hereinafter.

Control unit (4) is for the automatic adjusting of self-excited switching power supply converter parameter (for example: the electric current of operating frequency, output, voltage or power, and function such as soft start, various protections) provides control signal.

Power output branch units (5) is the power output device of self-excited switching power supply converter, sees for details hereinafter.

2.2 the present situation of self-excited switching power supply converter technology

Self-excited switching power supply converter is input as the civil power alternating current (minority also can by direct current supply) of 50/60Hz, because must be through rectification, filtering, so volume is relatively large, the relatively poor electrolytic capacitor filter device of reliability is absolutely necessary, simultaneously because of running into safety standard (as UL, CCEE etc.) and the restriction of EMC instruction (as IEC, FCC, CSA), exchange input side and must add the element that EMC filtering and use meet safety standard, so just limit the miniaturization of self-excited switching power supply converter volume, in addition, because inner high frequency, high pressure, the high-current switch action, make that solving EMC electromagnetic compatibility problem difficulty strengthens, and has also just proposed very high requirement to inner high-density installation circuit design.

What be worth emphaticallying point out is: in self-excited switching power supply converter, the electrolytic capacitor filter device that is positioned at power supply interchange input side both was absolutely necessary, also be to cause self-excited switching power supply converter to inject a large amount of high order harmonic components, and electrical network and other electric equipment are caused serious harmonic pollution and disturb main cause to electrical network.And same owing to the electrolytic capacitor filter device, making does not have the self-excited switching power supply converter of power-factor compensator (PFC), and the power factor of its net side is not high, only has about 0.6 usually.In order to solve this difficult problem, global industry is developed many moneys and is carried out active power factor compensation (PFC) integrated circuit.Even if yet be equipped with the self-excited switching power supply converter that improves power factor compensation (PFC) circuit, still there are problems such as electrolytic capacitor poor reliability, temperature tolerance sensitivity.Pfc circuit makes cost significantly improve in addition, has seriously blocked the development of self-excited switching power supply converter technology.

It is cheap relatively that self-excited switching power supply converter has a cost, efficient is than advantages such as height, thereby be widely used in such as in the illumination self-excited switching power supply converter (electric ballast), but, same because power supply exchanges the existence of the electrolytic capacitor filter device of input side, make large tracts of land, use the reasons such as the startup surge that fluorescent lamp, electricity-saving lamp produced, zero line overload of electric ballast to cause many accidents in a large number.This is because this class power supply of electric ballast, can produce a large amount of triple-frequency harmonics at its electrolytic capacitor filter device that exchanges input side, the severe contamination electrical network, cause the quality of power supply to worsen, and triple-frequency harmonics is a Zero-pharse harmonic, can on the neutral line (zero line), carry out the algebraically superposition, will cause the overload of the neutral line (zero line) electric current, very easily cause fire incident.On the other hand, the self-excited switching power supply converter magnetic coupler element that forms self-oscillation of relying is the pulsed drive transformer, although industry is racked one's brains, design the scheme of many its output drive signals of improvement, but this pulsed drive transformer output drive signal is still very undesirable, make and always between " overdriving " and " owing to drive ", played pendulum that this is the main cause that causes auto-excitation type self-excited switching power supply converter performance degradation by the power switch transistor of its driving.

2.3 the driving adapter circuit of the power switch transistor in the self-excited switching power supply converter

In power switch topological structure unit (2), be to drive adapter circuit between the drive signal input pin of power switch transistor and source driving signal (pulsed drive transformer).The function that drives adapter circuit is: the conversion of signals of source driving signal output or be modified to and meet the drive signal that power switch transistor requires.Driving adapter circuit ambipolar, the MOS type is different, referring to Fig. 2 and Fig. 3.To the bipolar-type power switch triode, the drive signal input pin is: the emitter (e) of base stage of driving signal input (b) and public input.To MOS type power switch transistor, the drive signal input pin is: the source electrode (S) of grid of driving signal input (G) and public input.Although the designed driving adapter circuit of circuit designers is varied, observe from the angle of source driving signal, driving adapter circuit is the circuit with two input terminals.In this manual, simple and direct in order to illustrate, the terminal related with the pin of driving signal input called driving adaptive input (SkB); The terminal related with the pin of public input called driving adaptive input (SkE).In like manner, if the driving adapter circuit of power switch transistor and it is regarded as a power electronic switching assembly (Sk), then assembly (Sk) also has lead-out terminal (Vck) and (COMk), referring to Fig. 4 except above-mentioned (SkB), (SkE) input terminal.

2.4 the output of the power in self-excited switching power supply converter branch units (5)

Power output node (Pout) and (Pcom) is arranged on the power switch topological structure unit (2) in the self-excited switching power supply converter.For semibridge system and full-bridge type supply convertor, 1 (Pout) node and 1 (Pcom) node are arranged, referring to Fig. 5; For the push-pull type supply convertor, 2 (Pout) nodes and 1 (Pcom) node are arranged, referring to Fig. 6.

The cross-over connection of power output branch units (5) is in the power take-off (Pout) of power switch topological structure unit (2) with (Pcom).Power output branch units (5) can include resonant capacitor, current detector, inductance or power output transformer (T) (comprising the straightening and filtering unit that is connected with power output transformer (T) secondary coil), load devices such as (RL).

The input coil (Ni) of pulse drive transformer assembly unit (3) can insert in this power output branch units (5), referring to Fig. 7 and Figure 13 with " series connection access way " or " magnetic coupling access way ".

Power output in the self-excited switching power supply converter can have two kinds of forms: the one, " isolating output ", referring to Fig. 7: promptly the primary coil of power output transformer (T) is connected among the power output branch, realize isolating output (secondary loop of transformer (T) can be provided with rectification, filter circuit), the 2nd, " non-isolation output ": promptly in " power output branch ", inductance coil (L) and load (RL) have been connected in series, realize non-isolation output, referring to Fig. 8.The latter is more common in the illumination self-excited switching power supply converter, as, electric ballast.

2.5 the basic principle of magnetic amplifier

The design core that the present invention is different from prior art is to have adopted the magnetic amplifier technology, therefore is necessary the background technology of magnetic amplifier is illustrated.Magnetic amplifier is the abbreviation of regulex.Its essence is a kind of saturated inductor that is subjected to direct current control.For magnetic amplifier with the work of all-wave mode, its magnetic core has magnetic core closed magnetic circuit, that saturable ferromagnetic material is made with 2 (to be called for short: magnetic core, as ferrite bead, down together), and coiling (adopt worn around mode more) many groups coil is thereon formed.Coil can be divided into the DC control coil and exchange controlled coils.Because high-frequency magnetic core adopts high permeability materials, when not having the direct current circulation in the DC control coil, the induction reactance that exchanges controlled coils is very big, and the alternating current of circulation is less.In case the direct current circulation is arranged in the DC control coil, and make magnetic core saturated, the induction reactance that exchanges controlled coils will reduce, and the direct current that flows through is big more, the induction reactance that exchanges controlled coils is more little.Utilize direct current less in the DC control coil like this, just can control and exchange bigger alternating current in the controlled coils.

The connection constraints condition of each coil of full wave magnetic amplifier is: flow through the magnetic flux that electric current produced that exchanges controlled coils, be coupled in the DC control coil, the first-harmonic electromotive force that is produced must be cancelled each other.

In the present invention, and it is related to the present invention, the inventor has, Granted publication number is in the utility model patent of CN 200962687Y, exchanging controlled coils itself is the transformer form, referring to Fig. 9, that is: exchange controlled coils and be divided into the controlled defeated people's coil (Ni of interchange, the former limit of transformer, be called for short: defeated people's coil) with exchange controlled output winding (transformer secondary, be called for short: output winding Nao and Nbo), then (be called for short: when not having the direct current circulation control coil Nd), the signal of defeated people's coil can be according to transformer principle, and magnetic coupling is to output winding smoothly when the DC control coil.Can claim that magnetic amplifier is in opening state this moment.This is corresponding to the self-excited switching power supply converter normal operating conditions.In case the direct current circulation is arranged in the control coil, and make magnetic core saturated, magnetic coupling will be suppressed, the output of output winding will weaken.Direct current is big more, and the magnetic core degree of saturation is dark more, and the repressed degree of magnetic coupling is just big more.Can claim that magnetic amplifier is in adjustment state this moment.This is corresponding to the operating state of self-excited switching power supply converter voltage stabilizing or current stabilization or Power Regulation.Continue to increase direct current, cause magnetic core saturated fully, magnetic coupling is cut off, and output winding is output as zero.Can claim that magnetic amplifier is in off state this moment.This is corresponding to the overvoltage or the overcurrent protection operating state of self-excited switching power supply converter.

The problem of " end of the same name " 2.6 of magnetic coupling system, the series connection of coil and parallel connection

The definition of " end of the same name " of magnetic coupling system is: when electric current respectively when two coils certain end separately flows into (or flow out) simultaneously, if the magnetic flux that both produce help, these two ends are called the end of the same name of two mutual inductors, or be called the top of two mutual inductors, represent with sign " " in the diagram, and with top called after " 1 ", other two ends then are called the end of two mutual inductors, called after " 2 ".For example, " Nao-1 " means the top of Nao coil, and the rest may be inferred.According to the operation principle of magnetic amplifier, the coiling direction of each coil must be selected by " end of the same name " definition of magnetic coupling system in the magnetic amplifier.In this specification, convenient for what illustrate, following regulation is made in the series connection of two coils:

Two coil series connection: the top of a coil (perhaps terminal) is connected with the end (perhaps top) of another coil, be called the forward series connection, otherwise the top of a coil (perhaps terminal) is connected with the top (perhaps terminal) of another coil, is called differential concatenation.

Two coils from parallel connection of coils: the top of a coil (perhaps terminal) is connected with the top (perhaps terminal) of another coil, be called the forward parallel connection, otherwise the top of a coil (perhaps terminal) is connected with the end (perhaps top) of another coil, is called reverse parallel connection.

2.7 conventional magnetic circuit and quadrature magnetic circuit, the quadrature transformer basic principle

In this specification, magnetic core with a closed magnetic circuit is referred to as conventional magnetic core, its closed magnetic circuit is called conventional magnetic circuit, magnetic core with two mutually orthogonal closed magnetic circuits is called the quadrature magnetic core, one of them is wound with output winding (Nxon), input coil (Nxin) closed magnetic circuit is called conventional magnetic circuit, and another closed magnetic circuit is called the quadrature magnetic circuit.An example of quadrature transformer is: use common " jar type ferrite magnetic core " (to be called for short: the magnetic jar, see Figure 10) realize quadrature coupling: coiling control coil (Nd) in the annular space at the skeleton place of magnetic jar, the closed magnetic circuit of this coil correspondence is called the quadrature magnetic circuit.After the magnetic jar is involutory, wear in fixing hole around defeated people's coil (Ni) and a plurality of output winding (Naon), the closed magnetic circuit of these coil correspondences is called conventional magnetic circuit.As seen, in fixing hole, wear around defeated people's coil (Ni) and output winding (Naon) between be close-coupled, and in fixing hole, wear around a plurality of coils and the control coil (Nd) in the annular space coiling at the skeleton place of magnetic jar between be weak coupling, this has just constituted quadrature transformer.Regulate the electric current in the control coil (Nd), just can regulate the equivalent permeability of magnetic core, thereby change the output state of output winding (Naon), finally change the operating frequency of self-excited switching power supply converter.

Because the reason of above-mentioned " weak coupling ", the definition of the end of the same name of the coil in the definition of the end of the same name of the coil in the conventional magnetic circuit of quadrature transformer and the quadrature magnetic circuit no longer includes related.

" stride around " 2.8 in the magnetic amplifier coiling, " shared coil " and " two-wire and around " problem

A plurality of lead loop of magnetic amplifier adopt on the magnetic core of closed magnetic circuit more, with wear around method make.For reduce coil wear coiled this, the situation of the shared coil of a plurality of magnetic amplifiers is common, such as the magnetic amplifier with two same core, referring to Fig. 9, Figure 11.The described magnetic amplifier of this two width of cloth figure is equivalence fully on principle, and Fig. 9 has adopted shared coil that coiling is simplified.Shared coil is the lead coil that " leap wear around " (being called for short: " stride around ") forms on a plurality of magnetic cores." end of the same name " problem slightly complicated at this moment, sometimes one by one magnetic core wear around, can't simplify with " shared coil ".

According to " end of the same name " of magnetic coupling system definition, magnetic core of the lead of shared coil every " stride around " just means the new magnetic coupling system that enters, thereby the just once selection of new " end of the same name ".In other words, if shared coil " stride around " on 4 magnetic cores becomes 1 coil, 4 " end of the same name " signs " " just should be arranged on its circuit diagram symbol so, the rest may be inferred.The forward series connection that defeated people's coil Ni among Figure 12 is 4 coils, can adopt the method for common " stride around " shared coil to simplify coiling, because the coil of forward series connection is when " stride around ", bundle conductor is worn in the closed magnetic circuit of a plurality of magnetic cores around being " O " font, can claim this " stride around " method to be " O font stride around ".Control coil among Figure 12 (Nd) is another example, and it has 4 " end of the same name " signs " " from top to bottom, this illustrate this coil be in 4 magnetic coupling systems (magnetic amplifier), wear around.Its 1st " end of the same name " sign has been indicated " end of the same name " orientation of magnetic amplifier (Ma), wear around magnetic core be (a); Its 2nd " end of the same name " sign has been indicated " end of the same name " orientation of magnetic amplifier (Mb), wear around magnetic core be (b), by that analogy.As seen, the control coil on magnetic core (a), (d) is forward series connection, can form shared coil with the method for " O font stride around "; Control coil on magnetic core (b), (c) is forward series connection, also can form shared coil with the method for " O font stride around "; And be differential concatenation between the two, to the coil of differential concatenation, when " stride around ", lead can be in the closed magnetic circuit of a plurality of magnetic cores " 8 " font wear around.Because bundle conductor wears in the closed magnetic circuit of a plurality of magnetic cores around being " 8 " font, can claim this " stride around " method to be " 8 fonts stride around ".So just solved the simplification coiling problem of the control coil among Figure 12 (Nd) with " stride around " method of shared coil.For character express and illustrated clear and definite, in this specification, accompanying drawing to the coil that adopts the pulse drive transformer assembly unit (3) that " shared coil " simplify, can indicate the title of bridging line circle, for example: input coil (NiK), control coil (NdK), English alphabet " K " wherein represents that this coil is with " stride around " mode coiling.

Under the identical situation of the number of turns of two coils, adopting " two-wire and around " also is the way of simplifying coiling.

2.9 the effect of the pulse drive transformer assembly unit (3) in the self-excited switching power supply converter

The basic role of the pulse drive transformer assembly unit (3) in the self-excited switching power supply converter is: according to the circuit topology type of power switch topological structure unit (2), according to known self-excited switching power supply converter specification requirement and connected mode, for the power electronic switching assembly (Sk) in the power switch topological structure unit (2) provides driving.In " background technology " category, can have with reference to the inventor, Granted publication number is the utility model patent of CN 200962687Y, 3 kinds of coils are arranged in the pulse drive transformer assembly unit (3), referring to Fig. 7, they are: input coil (Ni), this is the electric energy input coil of this pulsed drive transformer.

Output winding (Nxon), (Sk) provides driving for the power electronic switching assembly.

Control coil (Nd), control magnetic core (Ma, magnetic saturation degree Mb), and then the operating state of power controlling switch topology unit (2).

2.10 the access way of the input coil (Nxin) of pulse drive transformer assembly (3)

According to known self-excited switching power supply converter specification requirement and connected mode, comprise that magnetic coupling, positive feedback form self-oscillatory principle, the input coil (Nxin) of pulse drive transformer assembly (3) can be with one of following 2 kinds of access waies, be connected with self-excited switching power supply converter: the 1st kind of access way is " series connection access way ", as Fig. 7, Fig. 8.Input coil (Nxin) can be connected among the power output branch units (5); The 2nd kind of access way is " magnetic coupling access way ", input coil (Nxin) can be at an adjustable resistance of series connection (Rf) afterwards, be connected with a secondary coil (Nt) of power output transformer (T) again, the primary coil of this power output transformer (T) is connected among the above-mentioned power output branch units (5), referring to Figure 13, this is more common in the push-pull type supply convertor.

2.11 the control unit of self-excited switching power supply converter (4)

The control unit of self-excited switching power supply converter (4) is that the automatic adjusting (for example: the electric current of operating frequency, output, voltage or power, and function such as soft start, various protections) of self-excited switching power supply converter parameter provides control signal.Have according to the inventor, Granted publication number is the utility model patent of CN 200962687Y, control coil (Nd) in the pulse drive transformer assembly unit (3) is accepted the current controling signal that contains flip-flop from control unit (4), by changing magnetic amplifier (Ma, Mb) magnetic saturation degree, change power switch topological structure unit (2) operating state, thereby realize above-mentioned functions.Therefore, the control unit of self-excited switching power supply converter (4) has detection, differentiation and the change-over circuit of output voltage, electric current, and for example: be used for the converter of regulated output voltage, that is: V/I transducer is referring to Fig. 7.This shows that power output branch units (5) provides control required primary signal for control unit (4).Figure 14 has for the inventor, Granted publication number is the accompanying drawing 9 in the utility model patent of CN 200962687Y, the internal circuit of " control unit (4) " among the figure, under the prerequisite that satisfies relevant " connection constraints condition " 5 (seeing below), also be applicable to the present invention.

Figure 15 is for having according to the inventor, and the theory diagram of the full-bridge amplistat formula switching power supply that Granted publication number designs for the utility model patent of CN 200962687Y can be used as brief summary of the present invention's " background technology ".

3 summary of the invention

3.1 the technical problem to be solved in the present invention

In self-excited switching power supply converter, (be called for short: the filtering of net side) required electrolytic capacitor both was absolutely necessary in the filtering of the power supply interchange input side of connection utility grid, also be to cause self-excited switching power supply converter to inject a large amount of high order harmonic components, and electrical network and other electric equipment are caused serious harmonic pollution and disturb main cause to electrical network.Same owing to the electrolytic capacitor filter device, making does not have the self-excited switching power supply converter of power-factor compensator (PFC), and the power factor of its net side is not high, only has about 0.6 usually.In order to solve this difficult problem, global industry is developed many moneys and is carried out active power factor compensation (PFC) integrated circuit.Even if yet be equipped with the self-excited switching power supply converter that improves power factor compensation (PFC) circuit, still there are problems such as electrolytic capacitor poor reliability, temperature tolerance sensitivity.Pfc circuit makes cost significantly improve in addition, has seriously blocked the development of self-excited switching power supply converter technology.

In view of the foregoing, the technical problem to be solved in the present invention is: a kind of pulse drive transformer assembly is provided, and its design core is to have adopted the magnetic amplifier technology, perhaps the quadrature transformer technology.Its effect is: for the power switch transistor in the self-excited switching power supply converter provides suitable driving.Because the characteristics of magnetic amplifier and quadrature transformer, first, make by power switch transistor that this pulse drive transformer assembly drove in wide range of voltages and under the situation that load impedance changes significantly, all can operate as normal, thereby make the novel self-excited switching power supply converter that has been equipped with this pulse drive transformer assembly have after the rectification of net side, do not need the characteristics of electrolytic capacitor filtering.Strictly speaking, the filtering after the rectification of net side needs, otherwise at each zero crossing of alternating voltage, self-excited switching power supply converter all can be because of the dead electricity failure of oscillation.Technical advantage of the present invention is: this novel self-excited switching power supply converter can (for example the valley point of dc pulse can reach below the DC10V at great " dc pulse ", and the peak dot of dc pulse can reach DC350V) operate as normal under the condition, therefore only need very little net side filtering capacitor, just can finish the power transfer of AC-AC or AC-DC.Such as, the net side filtering capacitor of every 1u f (microfarad) can be supported the power output that this novel self-excited switching power supply converter 100W is above.The second, owing to do not exchange input side electrolytic capacitor filter device, the input current of this novel self-excited switching power supply converter can not produce serious wave distortion, need not power factor compensation (PFC) usually.This is to suppressing and eliminating because of large tracts of land, use the fluorescent lamp that drives such as electric ballast, startup surge, zero line that electricity-saving lamp produces to cross to be loaded with obvious significance in a large number.The 3rd, because the Current Negative Three-Point Capacitance effect that magnetic amplifier and quadrature transformer provide makes that the driving of the power switch transistor that novel self-excited switching power supply converter is interior is suitable, " overdriving " and " owing to drive " can not take place; The switching characteristic of power switch transistor improves, this shows that power switch transistor input impedance raising, switching loss descend, the frequency response broadening, this especially seems estimable to the bipolarity power switch transistor, this is confirmed in oscillography waveform, device temperature rise.The 4th, hv filtering electrolytic capacitor in the self-excited switching power supply converter is because its volume is big,, poor reliability poor to the temperature tolerance, price are high, the weak link that always is considered to self-excited switching power supply converter, be equipped with the novel self-excited switching power supply converter of this pulse drive transformer assembly owing to do not need electrolytic capacitor to finish the filtering of net side, make reliability promote and cost decline, for the space has been opened up in further miniaturization.The 5th, because circuit is simple, magnetic amplifier is reliability and durability, thereby this technology has manufacturing, debugging is simple, and circuit parameter is stable, and anti-adverse environment, low cost and highly reliable advantage are especially remarkable to electricity-saving lamp and electric ballast beneficial effect.

3.2 the technical scheme that the present invention addresses the above problem

Because the present invention's " a kind of pulse drive transformer assembly that is used for self-excited switching power supply converter " can relate to multiple variable technique scheme, as; Magnetic core quantity, rectifier system, feedback connected mode, working method, circuit topology etc., so the technical program is divided into one " overall technological scheme " and 6 " branch technical scheme ", is described as follows:

3.2.1 overall technological scheme

3.2.1.1 general introduction

Figure 16 is a technical scheme block diagram of the present invention.Novel self-excited switching power supply converter, by AC power input unit (1), power switch topological structure unit (2), pulse drive transformer assembly unit (3), control unit (4), power output branch units (5) is formed, and wherein: AC power input unit (1) comprising: rectification, filtering, EMC, low value capacitor filtering.

Power switch topological structure unit (2) can include: full-bridge type, one of semibridge system or push-pull power switch circuit topology form.Pulse drive transformer assembly unit (3), in input coil (Nxin), output winding (Nxon), feedback coil (Nxfn) and (optionally) control coil (Nxdn) are arranged.

Control unit (4, optionally, nonessential) is for the automatic adjusting of self-excited switching power supply converter parameter (for example: the electric current of operating frequency, output, voltage or power, and functions such as soft start, various protections) provides control signal.

Power output branch units (5) is the power output device of self-excited switching power supply converter.

Notable feature of the present invention is to have feedback coil (Nxfn), " the feedback connected mode " of feedback coil (Nxfn) has four kinds, and they are: " serial Feedback connected mode ", " feedback connected mode in parallel ", " magnetic coupling feedback connected mode " and " self-saturation feedback connected mode ".Technical scheme of the present invention will be that the center is illustrated with " four kinds of connected modes of feedback ".

" reaction type magnetic amplifier " of the present invention, " self saturation type magnetic amplifier " and " quadrature transformer " technology, so the present invention is divided into 2 kinds on working method: " magnetic amplifier mode " and " quadrature transformer mode ";

In the present invention, because series connection has inserted rectifier cell in the loop at feedback coil (Nxfn) place, so can be divided into " full-wave rectification reaction type magnetic amplifier " and " bridge rectifier reaction type magnetic amplifier " 2 kinds of rectifier systems again.

In the present invention's applied " self saturation type magnetic amplifier ", because series connection has inserted rectifier diode in defeated people's coil (Nxin) loop, make and to have flow through electric current in defeated people's coil (Nxin) with DC component, thus feedback coil (Nxfn) can and input coil (Nxin) be merged into one " feedback input coil (Nxfin) ".

In the present invention, the feedback coil (Nxfn) and/or the control coil (Nxdn) of pulse drive transformer assembly (3) can select one of following two kinds of coiling modes to carry out coiling: first kind is " conventional coiling mode ", on each magnetic core, feedback coil (Nxfn) and/or control coil (Nxdn) can be wound on output winding (Nxon), shared, the same magnetic circuit of input coil (Nxin) (be called for short: conventional magnetic circuit, down with) magnetic core on; Second kind is " quadrature coiling mode ", feedback coil (Nxfn) and/or control coil (Nxdn) can be wound on have with the magnetic circuit of output winding (Nxon), input coil (Nxin) mutually the magnetic circuit of quadrature (be called for short: the quadrature magnetic circuit, down with) same magnetic core on.

3.2.1.2 the control coil among the present invention (Nxdn, optionally, nonessential)

The present invention has with reference to the inventor, and Granted publication number is the utility model patent of CN 200962687Y.At require to self-excited switching power supply converter parameter (for example: operating frequency; the electric current of output; voltage or power; and soft start; function such as overvoltage and overcurrent protection) automatically adjusts; can go up coiling (optionally at the magnetic core (Mx) of pulse drive transformer assembly (3); nonessential) the 4th kind of coil; be control coil (Nxdn); this coil is connected with (Dc-) with the output (Dc+) of the control unit (4) of self-excited switching power supply converter; accept the current signal that contains DC component of its generation; by changing the magnetic saturation degree of magnetic core; change the operating state of self-excited switching power supply converter, realize adjusting parameter.

Because power output branch units (5) provides control required primary signal for control unit (4), as: the relative current amplitude signal of current transformer output etc., therefore in some relevant drawings of this specification, represent the flow direction of signal between these two unit with the arrow line.

The naming method of " frame mode " 3.2.1.3 of pulse drive transformer assembly (3)

Among the present invention, in view of pulse drive transformer assembly (3) can have several working ways, rectifier system, feedback system, for simplicity of exposition, the naming method of " frame mode " of special predetermined pulse driving transformer assembly (3) is:

[(magnetic core quantity)+(rectifier system)+(feedback connected mode)+(working method)+(circuit topology)+(formula)] pulse drive transformer assembly

Be described as follows:

Be option in " () ".

(magnetic core quantity): the magnetic core quantity that constitutes pulse drive transformer assembly (3).

(rectifier system): 2 kinds of possible selections are arranged: " full-wave rectification ", " bridge rectifier ".

(feedback connected mode): 8 kinds, selection that four classes are possible are arranged: " serial Feedback " or " simplification serial Feedback ", " feedback in parallel " or " simplifying feedback in parallel ", " magnetic coupling feedback " or " simplifying A type magnetic coupling feedback " or " simplifying Type B magnetic coupling feedback " and " self-saturation feedback ".

(working method): 2 kinds of possible selections are arranged: " magnetic amplifier ", " quadrature transformer ".

(circuit topology): 3 kinds of possible selections are arranged: " full-bridge ", " half-bridge ", " recommending ".

(formula): suffix.

For example: " 4 magnetic core full-wave rectifications feedback in parallel magnetic amplifier full-bridge type pulse drive transformer assembly ", " 1 magnetic core bridge rectifier serial Feedback quadrature transformer semibridge system pulse drive transformer assembly " or the like.

3.2.1.4 feedback coil (Nxfn) and/or control coil (Nxdn), and " the connection constraints condition " of rectifier cell

In the present invention, owing to used magnetic amplifier technology and quadrature transformer technology, to feedback coil (Nxfn) and/or control coil (Nxdn), and rectifier cell has following 5 " connection constraints conditions ":

3.2.1.4.1 connection constraints condition 1

The magnetic flux condition that disappears mutually, this constraints is suitable for great majority " magnetic amplifier pulse drive transformer assembly " frame mode among the present invention." the connection constraints condition of each coil of the full wave magnetic amplifier " refinement by mentioned earlier of this constraints.Be expressed as follows: in any one half period of novel self-excited switching power supply converter, flow through the magnetic flux that electric current produced that exchanges controlled coils (that is: the input coil among the present invention (Nxin)), be coupled in the DC control coil (that is: feedback coil among the present invention (Nxfn) and/or control coil (Nxdn)), the first-harmonic electromotive force that is produced should be cancelled each other.Attention: for feedback coil (Nxfn), owing to need not to accept the control signal that external circuit provides as control coil (Nxdn), therefore the adverse effect of " first-harmonic electromotive force " is not too obvious.In other words, " connection constraints condition 1 " is " more weak constraint " state to feedback coil (Nxfn).This is that " full-wave rectification magnetic amplifier pulse drive transformer assembly " frame mode is made the foundation of simplification.

3.2.1.4.2 connection constraints condition 2

To output winding (Nxon) negative feedback condition, this constraints is suitable for great majority " magnetic amplifier pulse drive transformer assembly " frame mode among the present invention.Be expressed as follows: in any one half period of novel self-excited switching power supply converter, flow through the magnetic flux that electric current produced of certain feedback coil (Nxfn), its alternating component is coupled to the unique output winding (Nxon on the same magnetic core, can claim this feedback coil to be associated with this output winding) time, the polarity of the first-harmonic electromotive force that is produced, on trend, should make in the power switch topological structure unit (2), that power electronic switching assembly (Sk) that is driven by this output winding (Nxon) ends (be not actual ending, can claim this feedback coil to be associated with this power electronic switching assembly).This moment, if the actual cut-off state that is in of power electronic switching assembly (Sk) that this is associated, then claim this feedback coil that is associated (Nxfn) to be " by related feedback coil (Nxfnoff) ", otherwise, then claim this feedback coil that is associated (Nxfn) to be " saturated related feedback coil (Nxfnon) ".These two kinds of feedback coils are that " full-wave rectification magnetic amplifier pulse drive transformer assembly " frame mode is made the foundation of simplification.

3.2.1.4.3 connection constraints condition 3

The magnetic flux of two feedback coils (Nxfn) is condition in the same way, and this constraints is suitable for the most of frame modes among the present invention.Be expressed as follows:, in each half period of the alternating current of input coil (Nxin), flow through the flow direction unanimity that electric current produced of each feedback coil (Nxfn) on each magnetic core at the situation that two feedback coils (Nxfn) are arranged on each magnetic core.

3.2.1.4.4 connection constraints condition 4

Do not hinder the self-oscillation condition, this constraints is suitable for the entire infrastructure mode among the present invention.Be expressed as follows: the connection polarity of each rectifier cell can not hinder pulse drive transformer assembly (3) according to known self-excited switching power supply converter specification requirement and connected mode, finishes the necessary positive feedback process of self-oscillation in the magnetic coupling mode.

3.2.1.4.5 connection constraints condition 5

The magnetic flux of control coil (Nxdn) and feedback coil (Nxfn) is condition in the same way, and this constraints is suitable among the present invention, has the entire infrastructure mode of control coil (Nxdn).Be expressed as follows: in any one half period of novel self-excited switching power supply converter, if have electric current to flow through in the control coil (Nxdn), the polarity of the magnetic flux that electric current produced that then flows through control coil (Nxdn) is consistent with the polarity of the magnetic flux that electric current produced that flows through feedback coil (Nxfn).

The explanation of " 3.2.1.5 reduced form full-wave rectification magnetic amplifier pulse drive transformer assembly " frame mode

In first three kind of four kinds of feedbacks of feedback coil (Nxfn) connected mode, under the condition of " full-wave rectification magnetic amplifier pulse drive transformer assembly " frame mode, do not have under the prerequisite of obvious deterioration in pulse drive transformer assembly (3) performance, each feedback connected mode all has its " simplified way ".For " magnetic coupling feedback connected mode ", " simplified way " is slightly different: this is because in " magnetic coupling feedback connected mode ", feedback current in feedback coil derives from the magnetic coupling of another feedback coil of differential concatenation with it, in other words, the latter be the former " power supply ".So " simplified way " of " magnetic coupling feedback connected mode " has two kinds.

In " simplified way ", the inductance value of chosen feedback coil can be done the unified adjustment that increases or subtract, and its inductance value can be zero (that is: making the number of turns of chosen feedback coil is zero).This specification to " can adjust feedback coil ", all indicates " * " mark in the accompanying drawings, can do unified the adjustment to show its inductance value.The beneficial effect of this adjustment is except simplifying circuit and coiling, for adopt " two-wire, multi-thread and around " provide may beyond, can also change the feedback quantity of magnetic amplifier pulse drive transformer assembly (3), thereby change the operating frequency of self-excited switching power supply converter.

3.2.2 the branch technical scheme, technical scheme had 4 in of the present invention minute, and they are corresponding one by one with four kinds of feedback connected modes of feedback coil (Nxfn):

3.2.2.1 divide technical scheme 1: the serial Feedback connected mode

" the serial Feedback connected mode " of feedback coil (Nxfn) can be used for one of " conventional coiling mode " or " quadrature coiling mode " coiling; Conventional coiling mode at feedback coil (Nxfn), feedback coil (Nxfn) can connect with the frame mode of " full-wave rectification serial Feedback magnetic amplifier pulse drive transformer assembly ": can 2 feedback coils of coiling (Nxfn) on each magnetic core, 1 feedback coil (Nxfn) on each magnetic core is according to " connection constraints condition " 1 each other after the differential concatenation, form one " built-up coil ", connect with 1 diode again, (" ripple " refers to the alternate current operation cycle of self-excited switching power supply converter to become 1 " assembly of m half-wave work ", m is any positive integer, down together), can be according to the method for forming " assembly of m half-wave work ", but the diode reversed polarity is connected, form 1 " assembly of (m+1) individual half-wave work " in addition, with the assembly of these two " m; (m+1) is individual " half-wave work parallel with one another after, form 1 " assembly of all-wave work ", it is connected in series among the loop at input coil (Nxin) place, and above-mentioned connection should be satisfied " connection constraints condition " 2 simultaneously, 3,4 and 5; Above-mentioned " full-wave rectification serial Feedback magnetic amplifier pulse drive transformer assembly " frame mode, can be according to " connection constraints condition " 2, in each half period, from whole feedback coils (Nxfn), select " saturated related feedback coil (Nxfnon) ", and to make its inductance value be zero (that is: the number of turns that makes " saturated related feedback coil " is zero), thereby change " reduced form full-wave rectification serial Feedback magnetic amplifier pulse drive transformer assembly " frame mode into; According to known circuit theory, above-mentioned " full-wave rectification serial Feedback magnetic amplifier pulse drive transformer assembly " frame mode, can be by substituting diode with bridge rectifier (BR), 2 feedback coils (Nxfn) on each magnetic core are kept to 1, and with these feedback coils (Nxfn) measure such as differential concatenation each other, form " assembly of all-wave work " that meets " connection constraints condition " 1, and with its satisfied at the same time " connection constraints condition " 2,3, under 4 and 5 the prerequisite, be series among the loop at input coil (Nxin) place, thereby change " bridge rectifier serial Feedback magnetic amplifier pulse drive transformer assembly " frame mode into; Quadrature coiling mode at feedback coil (Nxfn), feedback coil (Nxfn) can connect with " 1 magnetic core full-wave rectification serial Feedback quadrature transformer formula pulse drive transformer assembly " frame mode, be wound with 2 feedback coils (Nxfn) on the quadrature magnetic circuit of its single magnetic core, the feedback coil (Nxfn) that it is relevant is identical with above-mentioned " full-wave rectification serial Feedback magnetic amplifier pulse drive transformer assembly " frame mode with the connection attribute of diode, and this connects needs to satisfy " connection constraints condition " 3,4 and 5; Feedback coil (Nxfn) also can connect with " 1 magnetic core bridge rectifier serial Feedback quadrature transformer formula pulse drive transformer assembly " frame mode, be wound with 1 feedback coil (Nxfn) on the quadrature magnetic circuit of its single magnetic core, the feedback coil (Nxfn) that it is relevant is identical with above-mentioned " bridge rectifier serial Feedback magnetic amplifier pulse drive transformer assembly " frame mode with the connection attribute of bridge rectifier (BR), and this connects needs to satisfy " connection constraints condition " 3,4 and 5.

3.2.2.2 divide technical scheme 2: feedback connected mode in parallel

" the feedback connected mode in parallel " of feedback coil (Nxfn) goes for one of " conventional coiling mode " or " quadrature coiling mode "; Conventional coiling mode at feedback coil (Nxfn), feedback coil (Nxfn) can connect with the frame mode of " full-wave rectification in parallel feedback magnetic amplifier pulse drive transformer assembly ": can 2 feedback coils of coiling (Nxfn) on each magnetic core, 1 feedback coil (Nxfn) on each magnetic core is according to " connection constraints condition " 1 each other after the differential concatenation, form one " built-up coil ", connect with 1 diode again, become 1 " assembly of m half-wave work ", can be according to the method for forming " assembly of m half-wave work ", but the diode reversed polarity is connected, form 1 " assembly of (m+1) individual half-wave work " in addition, with the assembly of these two " m; (m+1) is individual " half-wave work parallel with one another after, form one " assembly of all-wave work ", then it is connected in parallel the two ends of input coil (Nxin), above-mentioned connection should be satisfied " connection constraints condition " 2 simultaneously, 3,4 and 5; Among the assembly of above-mentioned two " m, (m+1) individual " half-wave work, can be in series with respectively 1 in order to the adjustable resistance (Rf) of adjusting feedback quantity (according to known circuit theory, after also can be parallel with one another with the assembly of above-mentioned two " m, (m+1) individual " half-wave work, form one " assembly of all-wave work ", connect in order to the adjustable resistance (Rf) of adjusting feedback quantity with 1 again, and then " assembly of all-wave work " of will contact this adjustable resistance (Rf) is parallel to the two ends of input coil (Nxin)); Above-mentioned " full-wave rectification feedback in parallel magnetic amplifier pulse drive transformer assembly " frame mode, can be according to " connection constraints condition " 2, in each half period, from whole feedback coils (Nxfn), select " saturated related feedback coil (Nxfnon) ", and to make its inductance value be zero (that is: the number of turns that makes " saturated related feedback coil " is zero), thereby change " reduced form full-wave rectification feedback in parallel magnetic amplifier pulse drive transformer assembly " frame mode into; According to known circuit theory, above-mentioned " full-wave rectification feedback in parallel magnetic amplifier pulse drive transformer assembly " frame mode, can be by substituting diode with bridge rectifier (BR), 2 feedback coils (Nxfn) on each magnetic core are kept to 1, and with it according to measures such as " connection constraints condition " 1 differential concatenations, form one " assembly of all-wave work ", and satisfy " connection constraints condition " 2 at the same time, 3, under 4 and 5 the prerequisite, be parallel to the two ends of input coil (Nxin), thereby change " bridge rectifier feedback in parallel magnetic amplifier pulse drive transformer assembly " frame mode into; Quadrature coiling mode at feedback coil (Nxfn), feedback coil (Nxfn) can connect with " 1 magnetic core full-wave rectification quadrature transformer formula in parallel pulse drive transformer assembly " frame mode, 2 feedback coils (Nxfn) are arranged on the quadrature magnetic circuit of its single magnetic core, the feedback coil (Nxfn) that it is relevant and the connection attribute of diode are identical with above-mentioned " full-wave rectification feedback in parallel magnetic amplifier pulse drive transformer assembly " frame mode, and this connects needs to satisfy " connection constraints condition " 3,4 and 5; Feedback coil (Nxfn) also can connect with " 1 magnetic core bridge rectifier feedback in parallel quadrature transformer formula pulse drive transformer assembly " frame mode, 1 feedback coil (Nxfn) is arranged on the quadrature magnetic circuit of its single magnetic core, the feedback coil (Nxfn) that it is relevant and the connection attribute of bridge rectifier (BR) are identical with above-mentioned " bridge rectifier feedback in parallel magnetic amplifier pulse drive transformer assembly " frame mode, and this connects needs to satisfy " connection constraints condition " 3,4 and 5.

3.2.2.3 divide technical scheme 3: magnetic coupling feedback connected mode

" the magnetic coupling feedback connected mode " of feedback coil (Nxfn) goes for conventional coiling mode, feedback coil (Nxfn) can connect with the frame mode of " full-wave rectification magnetic coupling feedback magnetic amplifier pulse drive transformer assembly ": can two feedback coils of coiling (Nxfn) on each magnetic core, feedback coil (Nxfn) on each magnetic core is according to " connection constraints condition " 1 differential concatenation each other, after forming one " built-up coil ", to be somebody's turn to do " built-up coil " again connects with a diode and the adjustable resistance (Rf) in order to the adjustment feedback quantity respectively, then with this by " built-up coil ", diode, " concatermer " head and the tail phase short circuit that adjustable resistance is in series, form a separate closing unidirectional circuit, can be called " loop 1 of all-wave work "; Can form another " loop 2 of all-wave work " according to the method for forming " loop 1 of all-wave work "; According to known circuit theory, separately adjustable resistance can unite two into one in above-mentioned " loop 1 of all-wave work ", " loop 2 of all-wave work "; Above-mentioned " full-wave rectification magnetic coupling feedback magnetic amplifier pulse drive transformer assembly " frame mode can be made the simplification of following dual mode: mode A and can do following simplification, and become the frame mode of " simplifying A type full-wave rectification magnetic coupling feedback magnetic amplifier pulse drive transformer assembly ": in " full-wave rectification magnetic coupling feedback magnetic amplifier pulse drive transformer assembly " frame mode, according to " connection constraints condition " 2, in m half period, select " by related feedback coil (Nxfnoff) " in whole feedback coils (Nxfn) from " loop 1 of all-wave work ", then in (m+1) individual half period, select " by related feedback coil (Nxfnoff) " in whole feedback coils (Nxfn) from " loop 2 of all-wave work ", to chosen feedback coil, its inductance value can be done the unified adjustment that increases or subtract, its inductance value also can be zero (that is: making the number of turns of chosen feedback coil is zero); Mode B can do following simplification, and become the frame mode of " simplifying Type B full-wave rectification magnetic coupling feedback magnetic amplifier pulse drive transformer assembly ": in " full-wave rectification magnetic coupling feedback magnetic amplifier pulse drive transformer assembly " frame mode, cancellation " loop 2 of all-wave work ", that is: can a feedback coil of coiling (Nxfn) on each magnetic core, feedback coil on each magnetic core (Nxfn) is according to " connection constraints condition " 1 each other after the differential concatenation, after forming one " built-up coil ", to be somebody's turn to do " built-up coil " again connects with a diode and the adjustable resistance (Rf) in order to the adjustment feedback quantity respectively, then with this by " built-up coil ", diode, " concatermer " head and the tail phase short circuit that adjustable resistance is in series forms a separate closing unidirectional circuit; The connection of above-mentioned three kinds of frame modes all should be satisfied " connection constraints condition " 2,3,4 and 5 simultaneously.

3.2.2.4 divide technical scheme 4: self-saturation feedback connected mode

" the self-saturation feedback connected mode " of feedback coil (Nxfn) goes for conventional coiling mode, feedback coil (Nxfn) can connect with " full-wave rectification self-saturation feedback magnetic amplifier pulse drive transformer assembly " frame mode, and can allow feedback coil (Nxfn) have the function of input coil (Nxin) concurrently, thereby give up input coil (Nxin), therefore hereinafter claim feedback coil (Nxfn) to be " feedback input coil (Nxfin) "; Method of attachment has two classes, and its common trait is: can 1 of coiling feed back input coil (Nxfin) on each magnetic core; Frame mode at " 2 magnetic core full-wave rectification ferristor formula pulse drive transformer assembly ", method of attachment is: 1 the feedback input coil (Nxfin) on 1 magnetic core is connected with 1 diode, and become 1 " assembly of m half-wave work ", at these diode two ends, be parallel with 1 in order to adjust the adjustable resistance (Rf) of feedback quantity; Can be according to the method for above-mentioned composition " assembly of m half-wave work ", but the diode reversed polarity is connected, on other 1 magnetic core, form 1 " assembly of (m+1) individual half-wave work ", with these two " m, (m+1) be individual " after the assembly of half-wave work is parallel with one another, form 1 " assembly of all-wave work ", select one of the described input coil of claim 1 (Nxin) 2 kinds " access waies ", replace it with " assembly of all-wave work "; Frame mode at " 4 magnetic core full-wave rectification ferristor full-bridge type pulse drive transformer assembly ", method of attachment is: each feedback input coil (Nxfin) on 4 magnetic cores is divided into two groups, and according to specification requirement of known full-bridge type self-excited switching power supply converter and connected mode, guarantee 2 every group the feedback input coils (Nxfin) separately the output signal of the output winding of unique correspondence (Nxon) be synchronous; In each group, with 2 feedback input coil (Nxfin) forward series connection (perhaps forward parallel connection), constitute one " built-up coil ", two groups of feedback coils can constitute 2 " built-up coils ", are called " built-up coil 1 " and " built-up coil 2 "; " built-up coil 1 " connected with 1 diode, and become 1 " assembly of m half-wave work ",, be parallel with 1 in order to adjust the adjustable resistance (Rf) of feedback quantity at the diode two ends; Can be according to the method for above-mentioned composition " assembly of m half-wave work ", but the diode reversed polarity is connected, constitute 1 " assembly of (m+1) individual half-wave work " in addition with " built-up coil 2 ", with the assembly of these two " m, (m+1) individual " half-wave work parallel with one another after, form 1 " assembly of all-wave work ", select one of the described input coil of claim 1 (Nxin) 2 kinds " access waies ", replace it with " assembly of all-wave work "; The method of attachment of above-mentioned two class formation modes all should be satisfied " connection constraints condition " 4 and 5 simultaneously.

3.3 compare with the existing pulse drive transformer assembly that is used for self-excited switching power supply converter, the present invention has following beneficial effect:

3.3.1 one of beneficial effect

This pulse drive transformer assembly can make by the power switch transistor of its driving in wide range of voltages and under the situation that load impedance changes significantly, all can operate as normal, do not need electrolytic capacitor to finish the characteristics that power supply exchanges the filtering of input side thereby make novel self-excited switching power supply converter have.In other words, novel self-excited switching power supply converter can (for example the valley point of dc pulse can reach below the DC10V at great " dc pulse ", peak dot can reach more than the DC350V) operate as normal under the condition, therefore only need very little filtering capacitor, just can finish the power transfer of AC-AC or AC-DC.Such as, every 1u f (microfarad) filtering capacitor can be supported the power output that this novel self-excited switching power supply converter 100W is above.

3.3.2 two of beneficial effect

Owing to do not exchange input side electrolytic capacitor filter device, the input current that has been equipped with the novel self-excited switching power supply converter of this pulse drive transformer assembly can not produce serious wave distortion, thereby can weaken and even cancel power-factor compensator (PFC).This is to suppressing and eliminating because of large tracts of land, use the fluorescent lamp that drives such as electric ballast, startup surge, zero line that electricity-saving lamp produces to cross to be loaded with obvious significance in a large number.

3.3.3 three of beneficial effect

Hv filtering electrolytic capacitor in the self-excited switching power supply converter is because its volume is big,, poor reliability poor to the temperature tolerance, price are high, the weak link that always is considered to self-excited switching power supply converter, be equipped with the novel self-excited switching power supply converter of this pulse drive transformer assembly owing to do not need electrolytic capacitor to finish the filtering that power supply exchanges input side, make this novel self-excited switching power supply converter reliability promote and cost decline, for the space has been opened up in further miniaturization.

3.3.4 four of beneficial effect

Because " magnetic coupling Current Negative Three-Point Capacitance " that magnetic amplifier and quadrature transformer provide effect, make that the driving of the power switch transistor in the novel self-excited switching power supply converter be equipped with this pulse drive transformer assembly is suitable, " overdriving " and " owing driving " can not take place; The switching characteristic of power switch transistor improves, and this shows that input impedance raising, switching loss descend, the frequency response broadening, and this especially seems estimable to the bipolarity power switch transistor.

3.3.5 five of beneficial effect

Because circuit is simple, magnetic amplifier is reliability and durability, thereby the present invention has manufacturing, debugging is simple, and circuit parameter is stable, and anti-adverse environment, low cost and highly reliable advantage are especially remarkable to electricity-saving lamp and electric ballast beneficial effect.

4 description of drawings

Fig. 1, background technology, the self-excited switching power supply converter block diagram, this is the structured flowchart of the self-excited switching power supply converter of indication of the present invention.

Fig. 2, background technology, the driving coupling circuit of bipolar-type power switch triode.

Fig. 3, background technology, the driving coupling circuit of MOS power switch transistor.

Fig. 4, background technology, power electronic switching assembly (Sk) is considered as a black box with power switch transistor and its driving coupling circuit.

Fig. 5, background technology, bridge-type inverter block diagram.

Fig. 6, background technology, push-pull type supply convertor block diagram.

Fig. 7, background technology, the series connection access way of input coil (Nxin), input coil can be exported in the branch units (5) with the mode access power of series connection.

Fig. 8, background technology, the self-excited switching power supply converter of non-isolation output is more common in the illumination self-excited switching power supply converter, as, electric ballast.

Fig. 9, background technology, the magnetic amplifier of transformer form.

Figure 10, background technology, jar type ferrite magnetic core is called for short: the magnetic jar.

Figure 11, background technology, the coiling of magnetic amplifier does not adopt shared coil to make coiling complicated.

Figure 12, background technology, the coiling of magnetic amplifier, " stride around " simplifies coiling on 4 magnetic cores.

Figure 13, background technology, the magnetic coupling access way of input coil (Ni), input coil is with in the magnetic coupling mode access power output branch units (5), and this is more common in the push-pull type supply convertor.

Figure 14, background technology, the semibridge system electric ballast, this is the accompanying drawing in the utility model patent that has of the inventor, the internal circuit of " control unit (4) " among the figure under the prerequisite that satisfies " connection constraints condition " 5, also is applicable to the present invention.

Figure 15, background technology, the theory diagram of the full-bridge type switching power converters that the utility model patent that has according to the inventor designs.

Figure 16 is applicable to novel switched supply convertor block diagram of the present invention.

Figure 17,2 magnetic core full-wave rectification serial Feedback magnetic amplifier semibridge system pulse drive transformer assemblies.

Figure 18,1 magnetic core bridge rectifier serial Feedback quadrature transformer semibridge system pulse drive transformer assembly.

Figure 19,4 magnetic core full-wave rectifications feedback in parallel magnetic amplifier full-bridge type pulse drive transformer assembly.

Figure 20,2 magnetic core bridge rectifiers feedback in parallel magnetic amplifier semibridge system pulse drive transformer assembly.

Figure 21,1 magnetic core bridge rectifier feedback in parallel quadrature transformer full-bridge type pulse drive transformer assembly.

Figure 22,2 magnetic core full-wave rectification magnetic couplings feedback magnetic amplifier push-pull type pulse drive transformer assembly.

Figure 23,2 magnetic cores simplify Type B magnetic coupling feedback magnetic amplifier semibridge system pulse drive transformer assembly.

Figure 24,2 magnetic core full-wave rectification ferristor semibridge system pulse drive transformer assemblies.

Figure 25,4 magnetic core full-wave rectification ferristor full-bridge type pulse drive transformer assemblies.

5 embodiments

Describe embodiment of the present utility model in detail below in conjunction with accompanying drawing.

5.1 embodiment 1,2 magnetic core full-wave rectification serial Feedback magnetic amplifier semibridge system pulse drive transformer assemblies are referring to Figure 17, an example as feedback coil (Nxfn) " serial Feedback connected mode ", version at " 2 magnetic core full-wave rectification serial Feedback magnetic amplifier semibridge system pulse drive transformer assembly ", pulse drive transformer assembly (3) has the identical magnetic core (Ma) of at least 1 closed magnetic circuit and (Mb) separately by 2, and 4 kinds of lead loop of coiling are formed on these closed magnetic circuits; These 4 kinds of lead loop are all according to claim 1 described " conventional coiling mode " coiling, they are: at output winding (Nao) on the magnetic core (Ma) and the output winding (Nbo) on magnetic core (Mb), they are by known self-excited switching power supply converter specification requirement and connected mode, be connected with (S2) with the power electronic switching assembly (S1) in the power switch topological structure unit (2), for it provides drive signal; Striding the input coil (NiK) that is around on magnetic core (Ma) and the magnetic core (Mb) is connected according to " the series connection access way " of the described input coil (Nin) of this specification 2.10 joints; At the feedback coil (Naf1) on the magnetic core (Ma), feedback coil (Naf2) and the feedback coil (Nbf1) on magnetic core (Mb), feedback coil (Nbf2), " the serial Feedback connected mode " of pressing feedback coil (Nxfn) connects; Concrete method of attachment is: the top (Nbi-1) of input coil (NiK) is connected with power take-off (Pout) node of half bridge circuit, terminal (Nai-2) is connected with the negative pole of diode (Df1) and the positive pole of diode (Df2), and the connected node of these two diodes is ends of " assembly of all-wave work "; The positive pole of diode (Df1) is connected with the series arm of being made up of feedback coil (Naf1), feedback coil (Nbf1).In this series arm, the end (Naf1-2) of feedback coil (Naf1) and the end (Nbf1-2) of feedback coil (Nbf1) are connected.The negative pole of diode (Df2) is connected with the series arm of being made up of feedback coil (Naf2), feedback coil (Nbf2).In this series arm, the top (Naf2-1) of feedback coil (Naf2) and the top (Nbf2-1) of feedback coil (Nbf2) are connected; The top (Nbf1-1) of feedback coil (Nbf1) and the end (Nbf2-2) of feedback coil (Nbf2) are connected, this connected node is the other end of " assembly of all-wave work ", this connected node can be connected among the loop at input coil (Nxin) place, in this example, this node is connected with other devices that power is exported in the branch units (5); Control coil (Nbd) on being wound in magnetic core (Ma) control coil (Nad) and being wound in magnetic core (Mb) is connected for differential concatenation, adopt the winding method of " 8 fonts stride around " to form shared control coil (NdK), wherein the end (Nad-2) of coil (Nad) is connected with the lead-out terminal (Dcx+) of control unit (4), and the end (Nbd-2) of coil (Nbd) is connected with lead-out terminal (Dcx-).

Feedback coil (Naf2) is " a saturated related feedback coil (Nxfnon) " with feedback coil (Nbf1), and its inductance value can be done unified adjustment, also can be zero.

5.2 embodiment 2,1 magnetic core bridge rectifier serial Feedback quadrature transformer semibridge system pulse drive transformer assembly is referring to Figure 18, another example as feedback coil (Nxfn) " serial Feedback connected mode ", version at " 1 magnetic core bridge rectifier serial Feedback quadrature transformer semibridge system pulse drive transformer assembly ", pulse drive transformer assembly (3) have the magnetic core (Ma) of at least 2 mutually orthogonal magnetic circuits by 1 and on this magnetic core 4 kinds of lead loop of coiling form, these 4 kinds of lead loop are: output winding (Naol) on the conventional magnetic circuit of magnetic core (Ma) and output winding (Nao2), they are by known semibridge system self-activated switch supply convertor specification requirement and connected mode, be connected with (S2) with the power electronic switching assembly (S1) in the power switch topological structure unit (2), for it provides drive signal; Input coil (Ni) on the conventional magnetic circuit of magnetic core (Ma) connects according to " the series connection access way " of the described input coil (Nin) of this specification 2.10 joints; 1 feedback coil (Nfa) on magnetic core (Ma) quadrature magnetic circuit connects by " serial Feedback connected mode "; Concrete method of attachment is: the top (Nai-1) of the input coil (Ni) of pulse drive transformer assembly (3) is connected with power take-off (Pout) node of half bridge circuit, terminal (Nai-2) is connected with an AC input terminal of bridge rectifier (BR), and this terminal is an end of " assembly of all-wave work "; Another AC input terminal of bridge rectifier (BR) is the other end of " assembly of all-wave work ", this terminal can be connected among the loop at input coil (Nxin) place, in this example, this end is connected with other devices that power is exported in the branch units (5); The cathode output end of bridge rectifier (BR) is connected with the top (Naf-1) of feedback coil (Naf), and the end (Naf-2) of feedback coil (Naf) is connected with the cathode output end of bridge rectifier (BR); The top (Nad-1) of the control coil (Nd) on magnetic core (Ma) quadrature magnetic circuit is connected with the lead-out terminal (Dcx+) of control unit (4), and terminal (Nad-2) is connected with the lead-out terminal (Dcx-) of control unit (4).

5.3 embodiment 3,4 magnetic core full-wave rectifications feedback in parallel magnetic amplifier full-bridge type pulse drive transformer assembly is referring to Figure 19, an example as " in parallel feedback connected mode " of feedback coil (Nxfn), version at " 4 magnetic core full-wave rectifications feedback in parallel magnetic amplifier full-bridge type pulse drive transformer assembly ", pulse drive transformer assembly (3) is by 4 identical magnetic cores (Ma) of identical magnetic core that have at least 1 closed magnetic circuit separately, (Mb), (Mc) and (Md), and 4 kinds of lead loop of coiling are formed on this magnetic core, these 4 kinds of lead loop are all according to " conventional coiling mode " coiling, they are: the output winding (Nao) on magnetic core (Ma), output winding (Nbo) on magnetic core (Mb), at output winding (Nco) on the magnetic core (Mc) and the output winding (Ndo) on magnetic core (Md), they are by known full-bridge type self-activated switch supply convertor specification requirement and connected mode, with the power electronic switching assembly (S1) in the power switch topological structure unit (2), (S2), (S3), (S4) connect, for it provides drive signal; Stride be around in magnetic core (Ma), (Mb), (Mc) and (Md) on input coil (NiK), connect according to " the series connection access way " of this specification 2.10 described input coils of joint (Nin); 2 feedback coils are arranged on each magnetic core, and they are: at the feedback coil (Naf1) on the magnetic core (Ma) and (Naf2), at the feedback coil (Nbf1) on the magnetic core (Mb) and (Nbf2), at the feedback coil (Ncf1) on the magnetic core (Mc) and (Ncf2), the feedback coil (Ndf1) on magnetic core (Md) and (Ndf2); These 8 feedback coils, " feedback connected mode in parallel " described according to claim 1 connects; Concrete method of attachment is: at the two ends of input coil (NiK), be parallel with the feedback branch that is in series and is formed by adjustable resistance (Rf) and " assembly of all-wave work "; The end (Nai-2) of one end of adjustable resistance (Rf) and input coil (NiK) is connected, and the other end is connected with " assembly of all-wave work "; " assembly of all-wave work " is the parallel connection of 2 feedback branches; Feedback branch 1 by diode (Df1), feedback coil (Naf1), (Nbf1), (Ncf1) and (Ndf1) is connected in series and forms; Wherein, the negative pole of diode (Df1) is connected with adjustable resistance (Rf), and the positive pole of diode (Df1) is connected with the top of feedback coil (Naf1); The end of feedback coil (Naf1) is connected with the end of feedback coil (Nbf1); The top of feedback coil (Nbf1) is connected with the end of feedback coil (Ncf1); The top of feedback coil (Ncf1) is connected with the top of feedback coil (Ndf1); The end of feedback coil (Ndf1) is connected with the top (Ndi-1) of input coil (NiK); Feedback branch 2 by diode (Df2), feedback coil (Naf2), (Nbf2), (Ncf2) and (Ndf2) is connected in series and forms; Wherein, the positive pole of diode (Df2) is connected with adjustable resistance (Rf); The negative pole of diode (Df2) is connected with the end of feedback coil (Naf2); The top of feedback coil (Naf2) is connected with the top of feedback coil (Nbf2); The end of feedback coil (Nbf2) is connected with the top of feedback coil (Ncf2); The end of feedback coil (Ncf2) is connected with the end of feedback coil (Ndf2); The top of feedback coil (Ndf2) is connected with the top (Ndi-1) of input coil (NiK); Stride and be around in magnetic core (Ma), (Mb), (Mc) and the control coil (NdK) on the magnetic core (Md) adopt " 8 fonts stride around " method coiling, wherein the end (Ndd-2) of coil (Ndd) is connected with the lead-out terminal (Dcx+) of control unit (4), the top (Ndd-1) of coil (Ndd) is connected with the top (Ncd-1) of coil (Ncd), the end (Ncd-2) of coil (Ncd) is connected with the top (Nbd-1) of coil (Nbd), the end (Nbd-2) of coil (Nbd) is connected with the end (Nad-2) of coil (Nad), and the top (Nad-1) of coil (Nad) is connected with the lead-out terminal (Dcx-) of control unit (4).

Feedback coil (Ndf1), feedback coil (Naf1), feedback coil (Nbf2) and feedback coil (Ncf2) are " saturated related feedback coils (Nxfnon) ", and its inductance value can be done unified adjustment, also can be zero.

Figure 20 shows that " 2 magnetic core bridge rectifiers feedback in parallel magnetic amplifier semibridge system pulse drive transformer assembly ", explanation is omitted.

5.4 embodiment 4,1 magnetic core bridge rectifier feedback in parallel quadrature transformer full-bridge type pulse drive transformer assembly is referring to Figure 21, another example as " in parallel feedback connected mode " of feedback coil (Nxfn), version at " 1 magnetic core bridge rectifier feedback in parallel quadrature transformer full-bridge type pulse drive transformer assembly ", pulse drive transformer assembly (3) have the magnetic core (Ma) of at least 2 mutually orthogonal magnetic circuits by 1 and on this magnetic core 4 kinds of lead loop of coiling form, these 4 kinds of lead loop are: the output winding (Nao1) on the conventional magnetic circuit of magnetic core (Ma), output winding (Nao2), output winding (Nao3) and output winding (Nao4), they are by known full-bridge type self-activated switch supply convertor specification requirement and connected mode, with the power electronic switching assembly (S1) in the power switch topological structure unit (2), (S2), (S3) be connected with (S4), for it provides drive signal; Input coil (Ni) on the conventional magnetic circuit of magnetic core (Ma) connects according to " the series connection access way " of this specification 2.10 described input coils of joint (Nin); Feedback coil (Nfa) on magnetic core (Ma), according to " quadrature coiling mode " coiling, and by " feedback connected mode in parallel " connection; Concrete method of attachment is: two AC input terminals of bridge rectifier (BR) are parallel between the top (Nbi-1) and end (Nbi-2) of input coil (Ni) of pulse drive transformer assembly (3), the cathode output end of bridge rectifier (BR) is connected with the top (Naf-1) of feedback coil (Naf) with after adjustable resistance (Rf) is connected again; The end (Naf-2) of feedback coil (Naf) is connected with the cathode output end of bridge rectifier (BR); The top (Nad-1) of the control coil (Nd) on magnetic core (Ma) quadrature magnetic circuit is connected with the lead-out terminal (Dcx+) of control unit (4), and terminal (Nad-2) is connected with the lead-out terminal (Dcx-) of control unit (4).

5.5 embodiment 5,2 magnetic core full-wave rectification magnetic couplings feedback magnetic amplifier push-pull type pulse drive transformer assembly is referring to Figure 22, an example as " the magnetic coupling feedback connected mode " of feedback coil (Nxfn), version at " 2 magnetic core full-wave rectification magnetic couplings feedback magnetic amplifier push-pull type pulse drive transformer assembly ", pulse drive transformer assembly (3) has the identical magnetic core (Ma) of at least one closed magnetic circuit and (Mb) separately by two, and 4 kinds of lead loop of coiling are formed on the conventional magnetic circuit of this magnetic core, these 4 kinds of lead loop are: at output winding (Nao1) on the magnetic core (Ma) and the output winding (Nbo1) on magnetic core (Mb), they are by known self-excitation push-pull type switching power converters specification requirement and connected mode, be connected with (S2) with the power electronic switching assembly (S1) in the power switch topological structure unit (2), for it provides drive signal; Striding the input coil (NiK) that is around on magnetic core (Ma) and the magnetic core (Mb) is connected according to " the magnetic coupling access way " of this specification 2.10 described input coils of joint (Nxin); Pressing " magnetic coupling feedback connected mode " at the feedback coil (Naf1) on the magnetic core (Ma), feedback coil (Naf2) with feedback coil (Nbf1), feedback coil (Nbf2) on magnetic core (Mb) is connected; Concrete method of attachment is: the two ends of adjustable resistance (Rf) are parallel with two series arms, series arm 1 is composed in series by feedback coil (Naf1), feedback coil (Nbf1), diode (Df1), and series arm 2 is composed in series by feedback coil (Naf2), feedback coil (Nbf2), diode (Df2); After the positive pole of the negative pole of diode (Df1) and diode (Df2) was connected, the end with adjustable resistance (Rf) was connected again; After the top (Nbf1-1) of feedback coil (Nbf1) and the end (Nbf2-2) of feedback coil (Nbf2) were connected, the other end with adjustable resistance (Rf) was connected again; In series arm 1, the top (Naf1-1) of the positive pole of diode (Df1) and feedback coil (Naf1) is connected, and the end (Naf1-2) of feedback coil (Naf1) and the end (Nbf1-2) of feedback coil (Nbf1) are connected; In series arm 2, the negative pole of diode (Df2) is connected with the end (Naf2-2) of feedback coil (Naf2), and the top (Naf2-1) of feedback coil (Naf2) and the top (Nbf2-1) of feedback coil (Nbf2) are connected; Control coil (Nbd) on being wound in magnetic core (Ma) control coil (Nad) and being wound in magnetic core (Mb) is connected for differential concatenation, adopt the winding method of " 8 fonts stride around " to form shared control coil (NdK), the wherein top (Nad-1) of control coil (Nad) and control unit (4), that is: the lead-out terminal (Dcx-) of V/I (voltage/current) transducer connects, and the top (Nbd-1) of control coil (Nbd) is connected with the lead-out terminal (Dcx+) of control unit (4).

5.6 embodiment 6,2 magnetic cores are simplified Type B magnetic coupling feedback magnetic amplifier semibridge system pulse drive transformer assembly referring to Figure 23, another example as " the magnetic coupling feedback connected mode " of feedback coil (Nxfn), version at " 2 magnetic core reduced form magnetic couplings feedback magnetic amplifier semibridge system pulse drive transformer assembly ", pulse drive transformer assembly (3) has the identical magnetic core (Ma) of at least 1 closed magnetic circuit and (Mb) separately by 2, and 4 kinds of lead loop of coiling are formed on the conventional magnetic circuit of this magnetic core, these 4 kinds of lead loop are: at output winding (Nao1) on the magnetic core (Ma) and the output winding (Nbo1) on magnetic core (Mb), they are by known semibridge system self-activated switch supply convertor specification requirement and connected mode, be connected with (S2) with the power electronic switching assembly (S1) in the power switch topological structure unit (2), for it provides drive signal; Striding the input coil (NiK) that is around on magnetic core (Ma) and the magnetic core (Mb) is connected according to " the magnetic coupling access way " of this specification 2.10 described input coils of joint (Nxin); Pressing " magnetic coupling feedback connected mode " at the feedback coil (Naf1) on the magnetic core (Ma) with the feedback coil (Nbf1) on magnetic core (Mb) is connected; Concrete method of attachment is: the top (Nbf-1) of the negative pole of diode (Df) and feedback coil (Nbf) is connected, the end (Nbf-2) of feedback coil (Nbf) is connected with the end (Naf-2) of feedback coil (Naf), the top (Naf-1) of feedback coil (Naf) is connected with an end of adjustable resistance (Rf), the other end of adjustable resistance (Rf) is connected with the positive pole of diode (Df), forms the closed-loop path; Control coil (Nbd) on being wound in magnetic core (Ma) control coil (Nad) and being wound in magnetic core (Mb) is connected for differential concatenation, adopt the winding method of " 8 fonts stride around " to form shared control coil (NdK), wherein the end (Nad-2) of control coil (Nad) is connected with the lead-out terminal (Dcx+) of control unit (4), and the end (Nbd-2) of control coil (Nbd) is connected with lead-out terminal (Dcx-).

5.7 embodiment 7,2 magnetic core full-wave rectification ferristor semibridge system pulse drive transformer assemblies are referring to Figure 24, an example as " the self-saturation feedback connected mode " of feedback coil (Nxfn), version at " 2 magnetic core full-wave rectification ferristor semibridge system pulse drive transformer assembly ", pulse drive transformer assembly (3) by the identical magnetic core (Ma) of 2 identical magnetic cores that have at least 1 closed magnetic circuit separately and (Mb), and 3 kinds of lead loop of coiling are formed on this magnetic core closed magnetic circuit, and wherein feedback coil is merged into both " feedback input coil (Nxfin) " because of the function that has input coil concurrently; These 3 kinds of lead loop are all according to claim 1 described " conventional coiling mode " coiling, they are: the output winding (Nao) on magnetic core (Ma), output winding (Nbo) on magnetic core (Mb), these 2 output windings are by known semibridge system self-activated switch supply convertor specification requirement and connected mode, be connected with power electronic switching assembly (S1), (S2) in the power switch topological structure unit (2), for it provides drive signal; Be connected with feedback input coil (Nbfi) on magnetic core (Mb) " self-saturation feedback connected mode " at the feedback input coil (Nafi) on the magnetic core (Ma) according to feedback coil (Nxfn); In this example, " assembly of all-wave work " selects " the series connection access way " of this specification 2.10 described input coils of joint (Nxin) to connect, method is: the two ends of diode (Df1) are parallel with adjustable resistance (Rf1), the two ends of diode (Df2) are parallel with adjustable resistance (Rf2), after the negative pole of the positive pole of diode (Df1) and diode (Df2) is connected, be connected with the power take-off (Pout) of power switch topological structure unit (2), this node is an end of " assembly of all-wave work "; The negative pole of diode (Df1) is connected with the top (Nafi-1) of feedback input coil (Nafi), the positive pole of diode (Df2) is connected with the top (Nbfi-1) of feedback input coil (Nbfi), the end (Nafi-2) of feedback input coil (Nafi) is connected with the end (Nbfi-2) of feedback input coil (Nbfi), this connected node is the other end of " assembly of all-wave work ", and it is exported other interior devices of branch units (5) with power and is connected; Control coil (Nbd) on being wound in magnetic core (Ma) control coil (Nad) and being wound in magnetic core (Mb) is connected for differential concatenation, adopt the winding method of " 8 fonts stride around " to form shared control coil (NdK), wherein the end (Nad-2) of coil (Nad) is connected with the lead-out terminal (Dcx+) of control unit (4), and the end (Nbd-2) of coil (Nbd) is connected with lead-out terminal (Dcx-).

Shown in Figure 25 is " 4 magnetic core full-wave rectification ferristor full-bridge type pulse drive transformer assembly ", and explanation is omitted.

Claims (10)

1. pulse drive transformer assembly that is used for self-excited switching power supply converter, it is characterized in that: this pulse drive transformer assembly (3) is by at least one magnetic core (Mx, x is the magnetic core sequence number that English alphabet is represented, form down together), on each magnetic core, be wound with at least 3 kinds of lead loop (hereinafter to be referred as: coil); These 3 kinds of coils are: an input coil (Nxin, n are the coil sequence number that Arabic numerals are represented, the coil sequence number separate counts of various coils is together following), at least one output winding (Nxon) and at least one feedback coil (Nxfn); Pulse drive transformer assembly (3) is divided into 2 kinds on working method, they are: " magnetic amplifier mode " or " quadrature transformer mode "; The feedback coil (Nxfn) of pulse drive transformer assembly (3) is divided into 4 kinds on the feedback connected mode, they are: " serial Feedback connected mode ", " feedback connected mode in parallel ", " magnetic coupling feedback connected mode " and " self-saturation feedback connected mode "; The feedback coil (Nxfn) and/or the control coil (Nxdn) of pulse drive transformer assembly (3) are divided into 2 kinds on the coiling mode, they are: " conventional coiling mode " and " quadrature coiling mode ";

According to known self-excited switching power supply converter specification requirement and connected mode, comprise that magnetic coupling, positive feedback form self-oscillatory principle, each output winding (Nxon) of pulse drive transformer assembly (3), all be connected, for it provides drive signal with a power electronic switching assembly (Sk) in the power switch topological structure unit (2) of self-excited switching power supply converter; The input coil (Nxin) of pulse drive transformer assembly (3) is connected with self-excited switching power supply converter, and its common " access way " can have 2 kinds: " series connection access way " or " magnetic coupling access way "; Above-mentioned two kinds of coils are all with " conventional coiling mode " coiling;

Pulse drive transformer assembly (3) can add control coil (Nxdn), to realize the automatic adjusting to the parameter (as: frequency) of self-excited switching power supply converter; This coil is connected with (Dc-) with the output (Dc+) of the control unit (4) of self-excited switching power supply converter, accepts the current signal that contains DC component of its generation;

According to known electromagnetic induction knowledge, the top of above-mentioned lead loop is connected with terminal " end of the same name " definition according to the magnetic coupling system, under the situation of a plurality of magnetic cores, in order to reduce coiling difficulty and cost, can be according to the definition of " end of the same name " of magnetic coupling system, the method around " shared coil " is striden in utilization, and the same kind coil on a plurality of magnetic cores is merged.

2. a kind of pulse drive transformer assembly that is used for self-excited switching power supply converter according to claim 1, it is characterized in that: in magnetic amplifier pulse drive transformer assembly (3), all coils all is wound on the conventional magnetic circuit of conventional magnetic core, is wound with an output winding (Nxon) on each magnetic core; In quadrature transformer formula pulse drive transformer assembly (3), magnetic core with two mutually orthogonal magnetic circuits is arranged, output winding (Nxon), input coil (Nxin) in it are wound on the conventional magnetic circuit, and feedback coil (Nxfn) and/or control coil (Nxdn) in it are wound on the quadrature magnetic circuit; Being connected of feedback coil (Nxfn) in above-mentioned two kinds of pulse drive transformer assemblies (3) and control coil (Nxdn) must be satisfied corresponding " connection constraints condition " separately;

3. a kind of pulse drive transformer assembly that is used for self-excited switching power supply converter according to claim 1, it is characterized in that: " the serial Feedback connected mode " of feedback coil (Nxfn) goes for one of described two kinds of coiling modes of claim 1; Conventional coiling mode at feedback coil (Nxfn), feedback coil (Nxfn) can connect with the frame mode of " full-wave rectification serial Feedback magnetic amplifier pulse drive transformer assembly ": can two feedback coils of coiling (Nxfn) on each magnetic core, feedback coil (Nxfn) on each magnetic core is according to " connection constraints condition " 1 each other after the differential concatenation, form one " built-up coil ", connect with a diode again, (" ripple " refers to the alternate current operation cycle of self-excited switching power supply converter to become one " assembly of m half-wave work ", m is any positive integer, down together), can be according to the method for forming " assembly of m half-wave work ", but the diode reversed polarity is connected, form another " assembly of (m+1) individual half-wave work ", with the assembly of these two " m; (m+1) is individual " half-wave work parallel with one another after, form one " assembly of all-wave work ", it is connected in series among the loop at input coil (Nxin) place, and above-mentioned connection should be satisfied " connection constraints condition " 2 simultaneously, 3,4 and 5; Above-mentioned " full-wave rectification serial Feedback magnetic amplifier pulse drive transformer assembly " frame mode, can do following simplification, and change " reduced form full-wave rectification serial Feedback magnetic amplifier pulse drive transformer assembly " frame mode into: in " full-wave rectification serial Feedback magnetic amplifier pulse drive transformer assembly " frame mode, according to " connection constraints condition " 2, in each half period, from whole feedback coils (Nxfn), select " saturated related feedback coil (Nxfnon) " uniformly and (also can select " by related feedback coil (Nxfnoff) " uniformly, but must the two select one), and to the unified adjustment that increases or subtract of its inductance value do, its inductance value can be zero (that is: making the number of turns of the feedback coil of selecting is zero); Newspaper is according to known circuit theory, above-mentioned " full-wave rectification serial Feedback magnetic amplifier pulse drive transformer assembly " frame mode, can be by substituting diode with bridge rectifier (BR), two feedback coils (Nxfn) on each magnetic core are kept to one, and with these feedback coils (Nxfn) measure such as differential concatenation each other, form " assembly of all-wave work " that meets " connection constraints condition " 1, and with its satisfied at the same time " connection constraints condition " 2,3, under 4 and 5 the prerequisite, be series among the loop at input coil (Nxin) place, thereby change " bridge rectifier serial Feedback magnetic amplifier pulse drive transformer assembly " frame mode into; Quadrature coiling mode at feedback coil (Nxfn), feedback coil (Nxfn) can connect with " 1 magnetic core full-wave rectification serial Feedback quadrature transformer formula pulse drive transformer assembly " frame mode, be wound with two feedback coils (Nxfn) on the quadrature magnetic circuit of its single magnetic core, the feedback coil (Nxfn) that it is relevant is identical with above-mentioned " full-wave rectification serial Feedback magnetic amplifier pulse drive transformer assembly " frame mode with the connection attribute of diode, and this connects needs to satisfy " connection constraints condition " 3,4 and 5; Feedback coil (Nxfn) also can connect with " 1 magnetic core bridge rectifier serial Feedback quadrature transformer formula pulse drive transformer assembly " frame mode, be wound with a feedback coil (Nxfn) on the quadrature magnetic circuit of its single magnetic core, the feedback coil (Nxfn) that it is relevant is identical with above-mentioned " bridge rectifier serial Feedback magnetic amplifier pulse drive transformer assembly " frame mode with the connection attribute of bridge rectifier (BR), and this connects needs to satisfy " connection constraints condition " 4 and 5.

4. a kind of pulse drive transformer assembly that is used for self-excited switching power supply converter according to claim 1 is characterized in that: " the feedback connected mode in parallel " of feedback coil (Nxfn) goes for one of described two kinds of coiling modes of claim 1; Conventional coiling mode at feedback coil (Nxfn), feedback coil (Nxfn) can connect with the frame mode of " full-wave rectification in parallel feedback magnetic amplifier pulse drive transformer assembly ": can two feedback coils of coiling (Nxfn) on each magnetic core, feedback coil (Nxfn) on each magnetic core is according to " connection constraints condition " 1 each other after the differential concatenation, form one " built-up coil ", connect with a diode again, become one " assembly of m half-wave work ", can be according to the method for forming " assembly of m half-wave work ", but the diode reversed polarity is connected, form another " assembly of (m+1) individual half-wave work ", with the assembly of these two " m; (m+1) is individual " half-wave work parallel with one another after, form one " assembly of all-wave work ", then it is connected in parallel the two ends of input coil (Nxin), above-mentioned connection should be satisfied " connection constraints condition " 2 simultaneously, 3,4 and 5; Among the assembly of above-mentioned two " m, (m+1) individual " half-wave work, can be in series with respectively one in order to the adjustable resistance (Rf) of adjusting feedback quantity (according to known circuit theory, after also can be parallel with one another with the assembly of above-mentioned two " m, (m+1) individual " half-wave work, form one " assembly of all-wave work ", connect in order to the adjustable resistance (Rf) of adjusting feedback quantity with one again, and then " assembly of all-wave work " of will contact this adjustable resistance (Rf) is parallel to the two ends of input coil (Nxin)); Above-mentioned " full-wave rectification feedback in parallel magnetic amplifier pulse drive transformer assembly " frame mode, can do following simplification, and change " reduced form full-wave rectification feedback in parallel magnetic amplifier pulse drive transformer assembly " frame mode into: in " full-wave rectification feedback in parallel magnetic amplifier pulse drive transformer assembly " frame mode, can be according to " connection constraints condition " 2, in each half period, from whole feedback coils (Nxfn), select " saturated related feedback coil (Nxfnon) " uniformly and (also can select " by related feedback coil (Nxfnoff) " uniformly, but must the two select one), and to the unified adjustment that increases or subtract of its inductance value do, its inductance value can be zero (that is: making the number of turns of the feedback coil of selecting is zero); According to known circuit theory, above-mentioned " full-wave rectification feedback in parallel magnetic amplifier pulse drive transformer assembly " frame mode, can be by substituting diode with bridge rectifier (BR), two feedback coils (Nxfn) on each magnetic core are kept to one, and with it according to measures such as " connection constraints condition " 1 differential concatenations, form one " assembly of all-wave work ", and satisfy " connection constraints condition " 2 at the same time, 3, under 4 and 5 the prerequisite, be parallel to the two ends of input coil (Nxin), thereby change " bridge rectifier feedback in parallel magnetic amplifier pulse drive transformer assembly " frame mode into; Quadrature coiling mode at feedback coil (Nxfn), feedback coil (Nxfn) can connect with " 1 magnetic core full-wave rectification quadrature transformer formula in parallel pulse drive transformer assembly " frame mode, two feedback coils (Nxfn) are arranged on the quadrature magnetic circuit of its single magnetic core, the feedback coil (Nxfn) that it is relevant and the connection attribute of diode are identical with above-mentioned " full-wave rectification feedback in parallel magnetic amplifier pulse drive transformer assembly " frame mode, and this connects needs to satisfy " connection constraints condition " 3,4 and 5; Feedback coil (Nxfn) also can connect with " 1 magnetic core bridge rectifier feedback in parallel quadrature transformer formula pulse drive transformer assembly " frame mode, a feedback coil (Nxfn) is arranged on the quadrature magnetic circuit of its single magnetic core, the feedback coil (Nxfn) that it is relevant and the connection attribute of bridge rectifier (BR) are identical with above-mentioned " bridge rectifier feedback in parallel magnetic amplifier pulse drive transformer assembly " frame mode, and this connects needs to satisfy " connection constraints condition " 4 and 5.

5. a kind of pulse drive transformer assembly that is used for self-excited switching power supply converter according to claim 1, it is characterized in that: " the magnetic coupling feedback connected mode " of feedback coil (Nxfn) goes for the described conventional coiling mode of claim 1, feedback coil (Nxfn) can connect with the frame mode of " full-wave rectification magnetic coupling feedback magnetic amplifier pulse drive transformer assembly ": can two feedback coils of coiling (Nxfn) on each magnetic core, feedback coil (Nxfn) on each magnetic core is according to " connection constraints condition " 1 differential concatenation each other, after forming one " built-up coil ", to be somebody's turn to do " built-up coil " again connects with a diode and the adjustable resistance (Rf) in order to the adjustment feedback quantity respectively, then with this by " built-up coil ", diode, " concatermer " head and the tail phase short circuit that adjustable resistance is in series, form a separate closing unidirectional circuit, can be called " loop 1 of all-wave work "; Can form another " loop 2 of all-wave work " according to the method for forming " loop 1 of all-wave work "; According to known circuit theory, separately adjustable resistance can unite two into one in above-mentioned " loop 1 of all-wave work ", " loop 2 of all-wave work "; Above-mentioned " full-wave rectification magnetic coupling feedback magnetic amplifier pulse drive transformer assembly " frame mode can be made the simplification of following dual mode: mode A and can do following simplification, and become the frame mode of " simplifying A type full-wave rectification magnetic coupling feedback magnetic amplifier pulse drive transformer assembly ": in " full-wave rectification magnetic coupling feedback magnetic amplifier pulse drive transformer assembly " frame mode, according to " connection constraints condition " 2, in m half period, select " by related feedback coil (Nxfnoff) " in whole feedback coils (Nxfn) from " loop 1 of all-wave work ", then in (m+1) individual half period, select in whole feedback coils (Nxfn) from " loop 2 of all-wave work " " by related feedback coil (Nxfnoff) " (also can select uniformly " saturated related feedback coil (Nxfnon); but above-mentioned twice selection must be consistent); to chosen feedback coil; its inductance value can be done the unified adjustment that increases or subtract; its inductance value also can be zero (that is: making the number of turns of chosen feedback coil is zero); Mode B can do following simplification, and become the frame mode of " simplifying Type B full-wave rectification magnetic coupling feedback magnetic amplifier pulse drive transformer assembly ": in " full-wave rectification magnetic coupling feedback magnetic amplifier pulse drive transformer assembly " frame mode, cancellation " loop 2 of all-wave work ", that is: can a feedback coil of coiling (Nxfn) on each magnetic core, feedback coil on each magnetic core (Nxfn) is according to " connection constraints condition " 1 each other after the differential concatenation, after forming one " built-up coil ", to be somebody's turn to do " built-up coil " again connects with a diode and the adjustable resistance (Rf) in order to the adjustment feedback quantity respectively, then with this by " built-up coil ", diode, " concatermer " head and the tail phase short circuit that adjustable resistance is in series forms a separate closing unidirectional circuit; The connection of above-mentioned three kinds of frame modes all should be satisfied " connection constraints condition " 2,3,4 and 5 simultaneously.

6. a kind of pulse drive transformer assembly that is used for self-excited switching power supply converter according to claim 1, it is characterized in that: " the self-saturation feedback connected mode " of feedback coil (Nxfn) goes for the conventional coiling mode of the described feedback coil of claim 1 (Nxfn), feedback coil (Nxfn) can connect with " full-wave rectification self-saturation feedback magnetic amplifier pulse drive transformer assembly " frame mode, and can allow feedback coil (Nxfn) have the function of input coil (Nxin) concurrently, thereby give up input coil (Nxin), therefore hereinafter claim feedback coil (Nxfn) to be " feedback input coil (Nxfin) "; Method of attachment has two classes, and its common trait is: can one of coiling feed back input coil (Nxfin) on each magnetic core; Frame mode at " 2 magnetic core full-wave rectification ferristor formula pulse drive transformer assembly ", method of attachment is: the feedback input coil (Nxfin) on magnetic core is connected with a diode, and become one " assembly of m half-wave work ", at these diode two ends, be parallel with one in order to adjust the adjustable resistance (Rf) of feedback quantity; Can be according to the method for above-mentioned composition " assembly of m half-wave work ", but the diode reversed polarity is connected, on another magnetic core, form one " assembly of (m+1) individual half-wave work ", with these two " m, (m+1) be individual " after the assembly of half-wave work is parallel with one another, form one " assembly of all-wave work ", select one of the described input coil of claim 1 (Nxin) 2 kinds " access waies ", replace it with " assembly of all-wave work "; Frame mode at " 4 magnetic core full-wave rectification ferristor full-bridge type pulse drive transformer assembly ", method of attachment is: each feedback input coil (Nxfin) on 4 magnetic cores is divided into two groups, and according to specification requirement of known full-bridge type self-excited switching power supply converter and connected mode, guarantee two every group the feedback input coils (Nxfin) separately the output signal of the output winding of unique correspondence (Nxon) be synchronous; In each group, with two feedback input coil (Nxfin) forward series connection (perhaps forward parallel connection), constitute one " built-up coil ", two groups of feedback coils can constitute two " built-up coils ", are called " built-up coil 1 " and " built-up coil 2 "; " built-up coil 1 " connected with a diode, and become one " assembly of m half-wave work ",, be parallel with one in order to adjust the adjustable resistance (Rf) of feedback quantity at the diode two ends; Can be according to the method for above-mentioned composition " assembly of m half-wave work ", but the diode reversed polarity is connected, constitute another " assembly of (m+1) individual half-wave work " with " built-up coil 2 ", with the assembly of these two " m, (m+1) individual " half-wave work parallel with one another after, form one " assembly of all-wave work ", select one of the described input coil of claim 1 (Nxin) 2 kinds " access waies ", replace it with " assembly of all-wave work "; The method of attachment of above-mentioned two class formation modes all should be satisfied " connection constraints condition " 4 and 5 simultaneously.

7. a kind of pulse drive transformer assembly that is used for self-excited switching power supply converter according to claim 1, it is characterized in that: as an example of feedback coil (Nxfn) " serial Feedback connected mode ", version at " 2 magnetic core full-wave rectification serial Feedback magnetic amplifier semibridge system pulse drive transformer assembly ", pulse drive transformer assembly (3) has the identical magnetic core (Ma) of at least one closed magnetic circuit and (Mb) separately by two, and 4 kinds of lead loop of coiling are formed on these closed magnetic circuits; These 4 kinds of lead loop are all according to claim 1 described " conventional coiling mode " coiling, they are: at output winding (Nao) on the magnetic core (Ma) and the output winding (Nbo) on magnetic core (Mb), they are by known self-excited switching power supply converter specification requirement and connected mode, be connected with (S2) with the power electronic switching assembly (S1) in the power switch topological structure unit (2), for it provides drive signal; Striding the input coil (NiK) that is around on magnetic core (Ma) and the magnetic core (Mb) is connected according to " the series connection access way " of the described input coil of claim 1 (Nin); At the feedback coil (Naf1) on the magnetic core (Ma), feedback coil (Naf2) and the feedback coil (Nbf1) on magnetic core (Mb), feedback coil (Nbf2), " the serial Feedback connected mode " of pressing feedback coil (Nxfn) connects; Concrete method of attachment is: the top (Nbi-1) of input coil (NiK) is connected with power take-off (Pout) node of half bridge circuit, terminal (Nai-2) is connected with the negative pole of diode (Df1) and the positive pole of diode (Df2), and the connected node of these two diodes is ends of " assembly of all-wave work "; The positive pole of diode (Df1) is connected with the series arm of being made up of feedback coil (Naf1), feedback coil (Nbf1).In this series arm, the end (Naf1-2) of feedback coil (Naf1) and the end (Nbf1-2) of feedback coil (Nbf1) are connected.The negative pole of diode (Df2) is connected with the series arm of being made up of feedback coil (Naf2), feedback coil (Nbf2).In this series arm, the top (Naf2-1) of feedback coil (Naf2) and the top (Nbf2-1) of feedback coil (Nbf2) are connected; The top (Nbf1-1) of feedback coil (Nbf1) and the end (Nbf2-2) of feedback coil (Nbf2) are connected, this connected node is the other end of " assembly of all-wave work ", this connected node can be connected among the loop at input coil (Nxin) place, in this example, this point is connected with other devices that power is exported in the branch units (5); Control coil (Nbd) on being wound in magnetic core (Ma) control coil (Nad) and being wound in magnetic core (Mb) is connected for differential concatenation, adopt the winding method of " 8 fonts stride around " to form shared control coil (NdK), wherein the end (Nad-2) of coil (Nad) is connected with the lead-out terminal (Dcx+) of control unit (4), and the end (Nbd-2) of coil (Nbd) is connected with lead-out terminal (Dcx-); Feedback coil (Naf2) is " a saturated related feedback coil (Nxfnon) " with feedback coil (Nbf1), and its inductance value can be done unified adjustment, also can be zero.

8. a kind of pulse drive transformer assembly that is used for self-excited switching power supply converter according to claim 1, it is characterized in that: as an example of " in parallel feedback connected mode " of feedback coil (Nxfn), version at " 4 magnetic core full-wave rectifications feedback in parallel magnetic amplifier full-bridge type pulse drive transformer assembly ", pulse drive transformer assembly (3) is by 4 identical magnetic cores (Ma) of identical magnetic core that have at least one closed magnetic circuit separately, (Mb), (Mc) and (Md), and 4 kinds of lead loop of coiling are formed on this magnetic core, these 4 kinds of lead loop are all according to claim 1 described " conventional coiling mode " coiling, they are: the output winding (Nao) on magnetic core (Ma), output winding (Nbo) on magnetic core (Mb), at output winding (Nco) on the magnetic core (Mc) and the output winding (Ndo) on magnetic core (Md), they are by known full-bridge type self-activated switch supply convertor specification requirement and connected mode, with the power electronic switching assembly (S1) in the power switch topological structure unit (2), (S2), (S3), (S4) connect, for it provides drive signal; Stride be around in magnetic core (Ma), (Mb), (Mc) and (Md) on input coil (NiK), connect according to " the series connection access way " of the described input coil of claim 1 (Nin); Two feedback coils are arranged on each magnetic core, and they are: at the feedback coil (Naf1) on the magnetic core (Ma) and (Naf2), at the feedback coil (Nbf1) on the magnetic core (Mb) and (Nbf2), at the feedback coil (Ncf1) on the magnetic core (Mc) and (Ncf2), the feedback coil (Ndf1) on magnetic core (Md) and (Ndf2); These 8 feedback coils, " feedback connected mode in parallel " described according to claim 1 connects; Concrete method of attachment is: at the two ends of input coil (NiK), be parallel with the feedback branch that is in series and is formed by adjustable resistance (Rf) and " assembly of all-wave work "; The end (Nai-2) of one end of adjustable resistance (Rf) and input coil (NiK) is connected, and the other end is connected with " assembly of all-wave work "; " assembly of all-wave work " is the parallel connection of two feedback branches; Feedback branch 1 by diode (Df1), feedback coil (Naf1), (Nbf1), (Ncf1) and (Ndf1) is connected in series and forms; Wherein, the negative pole of diode (Df1) is connected with adjustable resistance (Rf), and the positive pole of diode (Df1) is connected with the top of feedback coil (Naf1); The end of feedback coil (Naf1) is connected with the end of feedback coil (Nbf1); The top of feedback coil (Nbf1) is connected with the end of feedback coil (Ncf1); The top of feedback coil (Ncf1) is connected with the top of feedback coil (Ndf1); The end of feedback coil (Ndf1) is connected with the top (Ndi-1) of input coil (NiK); Feedback branch 2 by diode (Df2), feedback coil (Naf2), (Nbf2), (Ncf2) and (Ndf2) is connected in series and forms; Wherein, the positive pole of diode (Df2) is connected with adjustable resistance (Rf); The negative pole of diode (Df2) is connected with the end of feedback coil (Naf2); The top of feedback coil (Naf2) is connected with the top of feedback coil (Nbf2); The end of feedback coil (Nbf2) is connected with the top of feedback coil (Ncf2); The end of feedback coil (Ncf2) is connected with the end of feedback coil (Ndf2); The top of feedback coil (Ndf2) is connected with the top (Ndi-1) of input coil (NiK); Stride and be around in magnetic core (Ma), (Mb), (Mc) and the control coil (NdK) on the magnetic core (Md) adopt " 8 fonts stride around " method coiling, wherein the end (Ndd-2) of coil (Ndd) is connected with the lead-out terminal (Dcx+) of control unit (4), the top (Ndd-1) of coil (Ndd) is connected with the top (Ncd-1) of coil (Ncd), the end (Ncd-2) of coil (Ncd) is connected with the top (Nbd-1) of coil (Nbd), the end (Nbd-2) of coil (Nbd) is connected with the end (Nad-2) of coil (Nad), and the top (Nad-1) of coil (Nad) is connected with the lead-out terminal (Dcx-) of control unit (4).

9. a kind of pulse drive transformer assembly that is used for self-excited switching power supply converter according to claim 1, it is characterized in that: as an example of " the magnetic coupling feedback connected mode " of feedback coil (Nxfn), version at " 2 magnetic cores are simplified Type B magnetic coupling feedback magnetic amplifier semibridge system pulse drive transformer assembly ", pulse drive transformer assembly (3) has the identical magnetic core (Ma) of at least 1 closed magnetic circuit and (Mb) separately by 2, and 4 kinds of lead loop of coiling are formed on the conventional magnetic circuit of this magnetic core, these 4 kinds of lead loop are: at output winding (Nao1) on the magnetic core (Ma) and the output winding (Nbo1) on magnetic core (Mb), they are by known semibridge system self-activated switch supply convertor specification requirement and connected mode, be connected with (S2) with the power electronic switching assembly (S1) in the power switch topological structure unit (2), for it provides drive signal; Striding the input coil (NiK) that is around on magnetic core (Ma) and the magnetic core (Mb) is connected according to " the series connection access way " of the described input coil of claim 1 (Nxin); Pressing " magnetic coupling feedback connected mode " at the feedback coil (Naf1) on the magnetic core (Ma) with the feedback coil (Nbf1) on magnetic core (Mb) is connected; Concrete method of attachment is: the top (Nbf-1) of the negative pole of diode (Df) and feedback coil (Nbf) is connected, the end (Nbf-2) of feedback coil (Nbf) is connected with the end (Naf-2) of feedback coil (Naf), the top (Naf-1) of feedback coil (Naf) is connected with an end of adjustable resistance (Rf), the other end of adjustable resistance (Rf) is connected with the positive pole of diode (Df), forms the closed-loop path; Control coil (Nbd) on being wound in magnetic core (Ma) control coil (Nad) and being wound in magnetic core (Mb) is connected for differential concatenation, adopt the winding method of " 8 fonts stride around " to form shared control coil (NdK), wherein the end (Nad-2) of control coil (Nad) is connected with the lead-out terminal (Dcx+) of control unit (4), and the end (Nbd-2) of control coil (Nbd) is connected with lead-out terminal (Dcx-).

10. a kind of pulse drive transformer assembly that is used for self-excited switching power supply converter according to claim 1, it is characterized in that: as an example of " the self-saturation feedback connected mode " of feedback coil (Nxfn), version at " 2 magnetic core full-wave rectification ferristor semibridge system pulse drive transformer assembly ", pulse drive transformer assembly (3) by the identical magnetic core (Ma) of two identical magnetic cores that have at least one closed magnetic circuit separately and (Mb), and 3 kinds of lead loop of coiling are formed on this magnetic core closed magnetic circuit, and wherein feedback coil is merged into both " feedback input coil (Nxfin) " because of the function that has input coil concurrently; These 3 kinds of lead loop are all according to claim 1 described " conventional coiling mode " coiling, they are: the output winding (Nao) on magnetic core (Ma), output winding (Nbo) on magnetic core (Mb), these two output windings are by known semibridge system self-activated switch supply convertor specification requirement and connected mode, be connected with power electronic switching assembly (S1), (S2) in the power switch topological structure unit (2), for it provides drive signal; Be connected with feedback input coil (Nbfi) on magnetic core (Mb) " self-saturation feedback connected mode " at the feedback input coil (Nafi) on the magnetic core (Ma) according to the described feedback coil of claim 1 (Nxfn); In this example, " assembly of all-wave work " selects " the series connection access way " of the described input coil of claim 1 (Nxin) to connect, method is: the two ends of diode (Df1) are parallel with adjustable resistance (Rf1), the two ends of diode (Df2) are parallel with adjustable resistance (Rf2), after the negative pole of the positive pole of diode (Df1) and diode (Df2) is connected, be connected with the power take-off (Pout) of power switch topological structure unit (2), this node is an end of " assembly of all-wave work "; The negative pole of diode (Df1) is connected with the top (Nafi-1) of feedback input coil (Nafi), the positive pole of diode (Df2) is connected with the top (Nbfi-1) of feedback input coil (Nbfi), the end (Nafi-2) of feedback input coil (Nafi) is connected with the end (Nbfi-2) of feedback input coil (Nbfi), this connected node is the other end of " assembly of all-wave work ", and it is exported other interior devices of branch units (5) with power and is connected; Control coil (Nbd) on being wound in magnetic core (Ma) control coil (Nad) and being wound in magnetic core (Mb) is connected for differential concatenation, adopt the winding method of " 8 fonts stride around " to form shared control coil (NdK), wherein the end (Nad-2) of coil (Nad) is connected with the lead-out terminal (Dcx+) of control unit (4), and the end (Nbd-2) of coil (Nbd) is connected with lead-out terminal (Dcx-).

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