CN104704731B

CN104704731B - Converter and bi-directional converter

Info

Publication number: CN104704731B
Application number: CN201380051026.2A
Authority: CN
Inventors: 人见基久
Original assignee: OLISEN ELECTRICAL CO Ltd
Current assignee: Olison Co
Priority date: 2012-10-05
Filing date: 2013-10-04
Publication date: 2017-05-03
Anticipated expiration: 2033-10-04
Also published as: JP5552149B2; WO2014054787A1; KR101654490B1; KR20150038104A; JP2014075943A; CN104704731A

Abstract

Provided are a converter and a bi-directional converter that can handle a wide range of input/output voltage current and that have reduced switching loss. This converter and this bi-directional converter have a first circuit connected to a primary coil of a transceiver, a second circuit connected to a secondary coil of the transceiver, and an inductance means connected to either the primary coil or the secondary coil of the transceiver. Of the switching elements of the first circuit of an upper arm of a first or second leg and the switching elements of the first circuit of a lower arm of a second or first leg, which constitute an on group in the first circuit, the switching elements of the first circuit to which a first capacitor or a second capacitor is connected in parallel are turned off first.

Description

Changer and reversible transducer

Technical field

The present invention relates to changer and reversible transducer.

Background technology

In general, it is used to make the transformator of input side and outlet side insulation used in DC-DC converter.Additionally, energy Enough input sides and the number of turns ratio of outlet side according to above-mentioned transformator, make input dc voltage boost or blood pressure lowering after export.Make For conventional DC-DC converter, such as transformator 16 of boosting used in the DC-DC converter of patent documentation 1.Such as patent Shown in Fig. 4 (a) of document 1, above-mentioned DC-DC converter makes second, third when the first, the 4th switch element 15a, 15d is turned on Switch element 15b, 15c disconnect, and invert above-mentioned action in next period, and replace in each period, thus produce high frequency Alternating voltage square wave.Boosted using 16 pairs of high-frequency ac voltage square waves produced by above-mentioned action of transformator, and Exported by full-wave rectifying circuit 17.When desired output voltage has been obtained, convertor controls portion 20 makes change-over circuit 14 The first, the 4th switch element 15a, 15d or second, third switch element 15b, 15c disconnect.

Equally, in the DC-DC converter shown in the Fig. 7 in patent documentation 2, by the Duty ratio control of changer 8, make defeated The DC voltage for entering becomes alternating voltage, and carries out transformation and by rectified current using 9 pairs of alternating voltages for obtaining of transformator Road 10 exports DC voltage.In above-mentioned DC-DC converter, the change in duty cycle of changer 8 is made according to the change of input voltage. In the DC-DC converter of above-mentioned patent documentation 2, dutycycle is caused to become hour, transformator 9 when input voltage is widely varied Loss become big.Therefore, in the DC-DC converter shown in the Fig. 8 in patent documentation 2, before changer 8 reduction voltage circuit was inserted 7, when input voltage is larger, make the action of reduction voltage circuit 7.Additionally, setting in the DC-DC converter shown in the Fig. 1 in patent documentation 2 Connection switching circuit 18 is put, output voltage is declined by connection switching circuit 18 when input voltage is larger.

Patent documentation 1：Japanese Laid-Open Patent Publication 2008-278723

Patent documentation 2：Japanese Laid-Open Patent Publication is flat No. 11-187654

But, there are the following problems in above-mentioned DC-DC converter：When desired output voltage is reached, in electric current Switching off for change-over circuit is also set to produce switching losses in the state of flowing.Additionally, there may be following problem：If Realization large-scale input and output voltage electric current, and make the switch element in changer corresponding with Duty ratio control, then transformation The loss of device becomes big, if the loss in order to reduce transformator, and arranges reduction voltage circuit or switching circuit, then circuit and control becomes Obtain complicated.

The content of the invention

It is an object of the invention to provide large-scale input and output voltage electric current can be corresponded to and switching losses are reduced Changer and reversible transducer.

Technical solution of the present invention one provides a kind of changer, it is characterised in that include：Transformator, with primary coil and time Level coil；First circuit, is connected with the primary side, and has：First area and second area, are connected in parallel on respectively first Between terminal and Second terminal, and using switch element as upper underarm, the switch element has and is parallel with respectively reversely simultaneously The switch element of di- pole pipe and shnt capacitor；First capacitor, with the upper underarm of the first area or second area One switch element parallel connection of the upper arm or underarm of one switch element or the first area and second area；And second is electric Container, with the first area or another switch element or the first area and second area of the upper underarm of second area Upper arm or underarm another switch element it is in parallel；Second circuit, is connected with the second coil side, and has：Bridge-type connects Circuit is connect, the secondary coil of the transformator is connected to in the unipolarity element between third terminal and forth terminal in bridge-type At least two unipolarity elements are parallel with respectively switch element, and the switch element is included and is parallel with shunt capacitance respectively The switch element of device；And the 3rd capacitor and the 4th capacitor, it is at least in parallel with two switch elements respectively；Inductance, By the primary between the junction point of the upper underarm of the junction point and the second area of the upper underarm of the first area Coil connects, or connects the junction point and institute that same polarity is connected between the unipolarity element in circuit in the bridge-type State and connected by the secondary coil between another junction point of same polarity series connection between unipolarity element；And control electricity Road, makes opening for the switch element of the upper arm of the first area or second area and the underarm of the second area or first area In groups alternate conduction disconnects to close unit, direct current be input into from first, second terminals side is converted to and is exchanged and from described the One circuit output, when the control for exercising the groups of switch element alternate conduction disconnection is entered, makes institute in the conduction state State the switch element of the upper arm of the groups of first area or second area and the underarm of the second area or first area Switch element in be parallel with first capacitor or the switch element of second capacitor first disconnects, the control Circuit in the switch element period in the conduction state of groups of first circuit so that from first, second terminals side Mode of the energy deposition of input in the inductance, makes the switch for being parallel with the 3rd capacitor or the 4th capacitor Unit forward conduction, and before the switch element for making first circuit for first disconnecting disconnects, make the forward conduction The switch element of second circuit disconnects, so that from the inspection of the described the voltage, electric current or electric power exported between three, forth terminal Measured value or the close desired value of detected value from the voltage, electric current or electric power being input between first, second terminal.

Technical solution of the present invention two provides a kind of changer, it is characterised in that include：Transformator, with primary coil and time Level coil；First circuit, is connected with the primary side, and has：First area and second area, are connected in parallel on respectively first Between terminal and Second terminal, and using switch element as upper underarm, the switch element has and is parallel with respectively reversely simultaneously The switch element of di- pole pipe and shnt capacitor；First capacitor, with the upper underarm of the first area or second area One switch element parallel connection of the upper arm or underarm of one switch element or the first area and second area；And second is electric Container, with the first area or another switch element or the first area and second area of the upper underarm of second area Upper arm or underarm another switch element it is in parallel；Second circuit, is connected with the second coil side, and has：Bridge-type connects Circuit is connect, the secondary coil of the transformator is connected to in the unipolarity element between third terminal and forth terminal in bridge-type At least two unipolarity elements are parallel with respectively switch element, and the switch element is included and is parallel with shunt capacitance respectively The switch element of device；And the 3rd capacitor and the 4th capacitor, it is at least in parallel with two switch elements respectively；Inductance, By the primary between the junction point of the upper underarm of the junction point and the second area of the upper underarm of the first area Coil connects, or connects the junction point and institute that same polarity is connected between the unipolarity element in circuit in the bridge-type State and connected by the secondary coil between another junction point of same polarity series connection between unipolarity element；And control electricity Road, makes opening for the switch element of the upper arm of the first area or second area and the underarm of the second area or first area In groups alternate conduction disconnects to close unit, direct current be input into from first, second terminals side is converted to and is exchanged and from described the One circuit output, when the control for exercising the groups of switch element alternate conduction disconnection is entered, makes institute in the conduction state State the switch element of the upper arm of the groups of first area or second area and the underarm of the second area or first area Switch element in be parallel with first capacitor or the switch element of second capacitor first disconnects, the control Circuit in the switch element period in the conduction state of groups of first circuit so that from first, second terminals side The energy of input to by way of the supply of the described 3rd, forth terminal side, makes the switch list of the second circuit the inductance Unit's not forward conduction, so that from the described the voltage, detected value of electric current or electric power or from institute exported between three, forth terminal State the close desired value of detected value of the voltage, electric current or electric power that are input between first, second terminal.

Technical solution of the present invention three provides a kind of changer, it is characterised in that include：Transformator, with primary coil and time Level coil；First circuit, is connected with the primary side, and has：First area and second area, are connected in parallel on respectively first Between terminal and Second terminal, and using switch element as upper underarm, the switch element has and is parallel with respectively reversely simultaneously The switch element of di- pole pipe and shnt capacitor；First capacitor, with the upper underarm of the first area or second area One switch element parallel connection of the upper arm or underarm of one switch element or the first area and second area；And second is electric Container, with the first area or another switch element or the first area and second area of the upper underarm of second area Upper arm or underarm another switch element it is in parallel；Second circuit, is connected with the second coil side, and has：Bridge-type connects Circuit is connect, the secondary coil of the transformator is connected to in the unipolarity element between third terminal and forth terminal in bridge-type At least two unipolarity elements are parallel with respectively switch element, and the switch element is included and is parallel with shunt capacitance respectively The switch element of device；And the 3rd capacitor and the 4th capacitor, it is at least in parallel with two switch elements respectively；Inductance, By the primary between the junction point of the upper underarm of the junction point and the second area of the upper underarm of the first area Coil connects, or connects the junction point and institute that same polarity is connected between the unipolarity element in circuit in the bridge-type State and connected by the secondary coil between another junction point of same polarity series connection between unipolarity element；And control electricity Road, makes opening for the switch element of the upper arm of the first area or second area and the underarm of the second area or first area In groups alternate conduction disconnects to close unit, direct current be input into from first, second terminals side is converted to and is exchanged and from described the One circuit output, when the control for exercising the groups of switch element alternate conduction disconnection is entered, makes institute in the conduction state State the switch element of the upper arm of the groups of first area or second area and the underarm of the second area or first area Switch element in be parallel with first capacitor or the switch element of second capacitor first disconnects, the control Circuit is from following action：In the switch element period in the conduction state of groups of first circuit, so that from described first, The energy of Second terminal side input is electric to described first by way of the inductance is supplied to the described 3rd, forth terminal side The switch element on road carries out Pulse Width Control, and makes the switch element of the second circuit not forward conduction, switches to following dynamic Make：In the switch element period in the conduction state of groups of first circuit, so that defeated from first, second terminals side Mode of the energy deposition for entering in the inductance, makes to be parallel with the 3rd capacitor or described the second of the 4th capacitor electric The switch element forward conduction on road, and make first circuit for first disconnecting switch element disconnect before, make it is described just Switch element to the second circuit of conducting disconnects so that from described the export between three, forth terminal voltage, electric current or The detected value of electric power or the close desired value of detected value from the voltage, electric current or electric power being input between first, second terminal.

Technical solution of the present invention four provides a kind of changer, it is characterised in that include：Transformator, with primary coil and time Level coil；First circuit, is connected with the primary side, and has：First area and second area, are connected in parallel on respectively first Between terminal and Second terminal, and using switch element as upper underarm, the switch element has and is parallel with respectively reversely simultaneously The switch element of di- pole pipe and shnt capacitor；First capacitor, with the upper underarm of the first area or second area One switch element parallel connection of the upper arm or underarm of one switch element or the first area and second area；And second is electric Container, with the first area or another switch element or the first area and second area of the upper underarm of second area Upper arm or underarm another switch element it is in parallel；Second circuit, is connected with the second coil side, and has：Bridge-type connects Circuit is connect, the secondary coil of the transformator is connected to in the unipolarity element between third terminal and forth terminal in bridge-type At least two unipolarity elements are parallel with respectively switch element, and the switch element is included and is parallel with shunt capacitance respectively The switch element of device；And the 3rd capacitor and the 4th capacitor, it is at least in parallel with two switch elements respectively；Inductance, By the primary between the junction point of the upper underarm of the junction point and the second area of the upper underarm of the first area Coil connects, or connects the junction point and institute that same polarity is connected between the unipolarity element in circuit in the bridge-type State and connected by the secondary coil between another junction point of same polarity series connection between unipolarity element；And control electricity Road, makes opening for the switch element of the upper arm of the first area or second area and the underarm of the second area or first area In groups alternate conduction disconnects to close unit, direct current be input into from first, second terminals side is converted to and is exchanged and from described the One circuit output, when the control for exercising the groups of switch element alternate conduction disconnection is entered, makes institute in the conduction state State the switch element of the upper arm of the groups of first area or second area and the underarm of the second area or first area Switch element in be parallel with first capacitor or the switch element of second capacitor first disconnects, the control Circuit is from following action：In the switch element period in the conduction state of groups of first circuit, so that from described first, Mode of the energy deposition of Second terminal side input in the inductance, makes to be parallel with the 3rd capacitor or the 4th capacitor The second circuit switch element forward conduction, and disconnect it in the switch element for making first circuit for first disconnecting Before, enter the pulse control of the switch element of the second circuit of the switch element disconnection of the second circuit for exercising the forward conduction System, switches to following action：In the switch element period in the conduction state of groups of first circuit, so that from described First, the energy of Second terminal side input makes described second the inductance to by way of the supply of the described 3rd, forth terminal side The switch element of circuit not forward conduction, so that from the described the voltage, electric current or electric power exported between three, forth terminal Detected value or the close desired value of detected value from the voltage, electric current or electric power being input between first, second terminal.

The present invention also provides a kind of reversible transducer, it is characterised in that electric as described first with described changer The first area on road or the upper underarm of second area, will be parallel with the switch of first circuit of first capacitor The switch element of unit and first circuit for being parallel with second capacitor connects, the bridge-type of the second circuit Connection circuit is made up of the 3rd region and the 4th region that are connected in parallel on respectively between third terminal and forth terminal, the 3rd area , using the switch element of the second circuit as upper underarm, the switch element of the second circuit has difference for domain and the 4th region The switch element of the unipolarity element and the shnt capacitor is parallel with, as the 3rd region or the 4th region Upper underarm, will be parallel with and the switch element of the second circuit of the 3rd capacitor and be parallel with the 4th capacitor The second circuit switch element connection, the control circuit makes the second of the 3rd region or four-range upper arm The switch element of the second circuit of the underarm in the switch element of circuit and the 4th region or the 3rd region alternate conduction in groups Disconnect, by direct current be input into from the described 3rd, forth terminal side be converted to exchange and from the second circuit output, when enter enforcement During the control that the switch element alternate conduction of the groups of second circuit disconnects, described groups of institute in the conduction state is made State the switch element of the second circuit of the 3rd region or four-range upper arm and the underarm in the 4th region or the 3rd region Second circuit switch element in, the second circuit for being parallel with the 3rd capacitor or the 4th capacitor is opened Close unit first to disconnect.

The changer and reversible transducer of the present invention can correspond to large-scale input and output voltage electric current and reduce switch Loss.

Description of the drawings

Fig. 1 is the pie graph of the changer of first embodiment of the invention.

Fig. 2 is to represent that switch element S5, S6 that second circuit 2 is made in the changer of first embodiment of the invention are turned on The ripple of of the drive signal of switch element S5, S6 of the switch element S1～S4 and second circuit 2 of the first circuit 1 during disconnection Shape figure.

Fig. 3 is to represent that switch element S5, S6 that second circuit 2 is made in the changer of first embodiment of the invention are turned on The oscillogram of of the exciting current of the voltage, electric current and transformator 11 of the switch element S1～S4 of the first circuit 1 during disconnection.

Fig. 4 is to represent that switch element S5, S6 that second circuit 2 is made in the changer of first embodiment of the invention are turned on The voltage of switch element S5, S6 of second circuit 2 during disconnection, the voltage of electric current and unipolarity element D7, D8, one of electric current Oscillogram.

Fig. 5 is the oscillogram of a part for the oscillogram for being exaggerated Fig. 3.

Fig. 6 is that switch element S5, S6 that second circuit 2 is made in the changer of first embodiment of the invention turns on disconnection When each moment formed circuit diagram.

Fig. 7 is to represent to make in the changer of first embodiment of the invention between third terminal T3 and forth terminal T4 The voltage of output is less than output electricity obtained from the action that disconnection is turned on by carrying out switch element S5, S6 of second circuit 2 The ripple of the drive signal of switch element S5, S6 of the switch element S1～S4 and second circuit 2 of the first circuit 1 in the action of pressure One of shape figure.

Fig. 8 is to represent to make in the changer of first embodiment of the invention between third terminal T3 and forth terminal T4 The voltage of output is less than output electricity obtained from the action that disconnection is turned on by carrying out switch element S5, S6 of second circuit 2 One 's of the exciting current of the voltage, electric current and transformator 11 of the switch element S1～S4 of the first circuit 1 in the action of pressure Oscillogram.

Fig. 9 is to represent to make in the changer of first embodiment of the invention between third terminal T3 and forth terminal T4 The voltage of output is less than output electricity obtained from the action that disconnection is turned on by carrying out switch element S5, S6 of second circuit 2 The voltage of the unipolarity element D5～D8 of the second circuit 2 in the action of pressure, the oscillogram of of electric current.

Figure 10 is to make in the changer of first embodiment of the invention to defeated between third terminal T3 and forth terminal T4 The voltage for going out is less than output voltage obtained from the action that disconnection is turned on by carrying out switch element S5, S6 of second circuit 2 Action in each moment formed circuit diagram.

Figure 11 is the pie graph of the reversible transducer of second embodiment of the invention.

Description of reference numerals

T1 the first terminals, T2 Second terminals, T3 third terminals, T4 forth terminals, 1 first circuit, 2,22 second circuits, 3,23 control circuits, 11 transformators, 12 First area, 13 second areas, 24 the 3rd regions, 25 the 4th regions, 16,17 electric capacity Device, the output voltage detection means of 18 second circuits, the output voltage detection means of 19 first circuits, S1～ The switch element of the circuits of S4 first, Q1～Q4 switch elements, D1～D4 anti-parallel diodes, C1 ～C4 shnt capacitors, D5～D8 unipolarity elements (anti-parallel diodes), S5～S8 second The switch element of circuit, Q5～Q8 switch elements, C5～C8 shnt capacitors, Ca～Cd first～ 4th capacitor, L inductance

Specific embodiment

Below, embodiments of the present invention are described in detail referring to the drawings.In addition, implementation below is the present invention A kind of mode, the present invention is not limited to above-mentioned embodiment.Additionally, in the implementation below and accompanying drawing of this specification, Reference identical element represents identical element.

(first embodiment)

Using Fig. 1～Fig. 6, the changer of first embodiment of the invention is illustrated.Fig. 1 represents that the present invention first is real Apply the pie graph of the changer of mode.Changer shown in Fig. 1 includes：The primary coil 11a sides of transformator 11 and transformator 11 First circuit 1 of connection and the second circuit 2 of the secondary coil 11b sides connection of transformator 11, inductance L and control circuit 3. The direct current being input into Second terminal T2 side from the first terminal T1 is converted to and exchanges and export from the first circuit 1 by above-mentioned changer, And exchange is converted to and to third terminal T3 and forth terminal of outlet side by direct current in second circuit 2 by transformator 11 T4 sides provide electric power.

The electric power of the power supply from peripheral hardware is input into the first terminal T1, Second terminal.The first terminal T1, Second terminal T2 it Between be connected with capacitor 16 and become DC voltage.Additionally, being connected with the first circuit 1, institute between the first terminal T1, Second terminal It is full bridge circuit to state the first circuit 1, and by switch element S1～S4 the upper underarm of first area 12 and second area 13 is constituted.

First area 12, second area 13 are connected in parallel on respectively between the first terminal and Second terminal.First area 12 will open Cell S 1, S2 is closed as upper underarm, second area 13 is using switch element S3, S4 as upper underarm.Switch element S1 used in Fig. 1 ～S4, above-mentioned switch element S1～S4 make switch element Q1～Q4 respectively with anti-parallel diodes D1～D4 and shnt capacitor C1～C4 is in parallel.That is, anti-parallel diodes D1～D4 is the internal body diodes of switch element S1～S4, shnt capacitor C1～ C4 is the parasitic capacitance of switch element S1～S4.

In addition, in the present invention, as shown in figure 1, the anti-parallel diodes D1～D4 in parallel with switch element Q1～Q4 The diode-built-in of switch element S1～S4 can be used, it is also possible to using relative to the two of switch element S1～independent peripheral hardwares of S4 Pole pipe, can also be in addition combinations thereof.Equally, as shown in figure 1, the shnt capacitor C1 in parallel with switch element Q1～Q4 ～C4 can use the parasitic capacitance of switch element S1～S4, it is also possible to using relative to switch element S1～independent peripheral hardwares of S4 Capacitor, can also be in addition combinations thereof.

First capacitor Ca, the second capacitor Cb are single with switch element S1, S4 of groups of first circuit 1 and switch respectively The switch element first disconnected in first S2, S3 is in parallel.In Fig. 1, by the first capacitor Ca, the second capacitor Cb respectively with first disconnect Switch element S3, S4 of the upper underarm of second area 13 is in parallel.

Second circuit 2 has：Bridge-type connects circuit, with unipolarity element D7, D8 and two switch elements S5, S6；With And the 3rd capacitor Cc and the 4th capacitor Cd, it is in parallel with two switch elements S5, S6 respectively, and the second circuit 2 with The secondary coil 11b sides connection of transformator 11.Switch element S5, S6 comprising switch element Q5, Q6, above-mentioned to open used in Fig. 1 Close element Q5, Q6 in parallel with unipolarity element D5, D6 and shnt capacitor C5, C6 respectively.Additionally, the unipolarity of same polarity series connection The series circuit of the series circuit of element D5, D6 and unipolarity element D7, D8 of same polarity series connection is connected in parallel on respectively third terminal Between T3, forth terminal T4.

Switch element S5, S6 used in Fig. 1, above-mentioned switch element S5, S6 make switch element Q5, Q6 respectively with reverse parallel connection Diode D5, D6 and shnt capacitor C5, C6 are in parallel.That is, unipolarity element D5, D6 are the pole of inside two of switch element S5, S6 Pipe, shnt capacitor C5, C6 are the parasitic capacitances of switch element S5, S6.In addition, in the present invention, as shown in figure 1, unipolarity Element D5, D6 can use the diode-built-in of switch element S5, S6, it is also possible to using independent relative to switch element S5, S6 The diode of peripheral hardware, can also be in addition combinations thereof.Equally, as shown in figure 1, shnt capacitor C5, C6 can be using opening Close the parasitic capacitance of cell S 5, S6, it is also possible to using the capacitor relative to the independent peripheral hardware of switch element S5, S6, additionally may be used Being combinations thereof.

In the bridge-type connection circuit of second circuit 2, the junction point and unipolarity of the series connection of unipolarity element D5, D6 same polarity Another junction point side of element D7, D8 same polarity series connection is connected with the secondary coil 11b of transformator 11.Additionally, at the 3rd end Capacitor 17 is connected between sub- T3, forth terminal T4, DC voltage is exported between third terminal T3, forth terminal T4.

Inductance L is connected to the junction point and second of the upper underarm of first area 12 by the primary coil 11a of transformator 11 Between the junction point of the upper underarm in region 13.Above-mentioned inductance L can also be connected to second by the secondary coil 11b of transformator 11 The junction point side of unipolarity element D5, D6 same polarity series connection in the bridge-type connection circuit of circuit 2 and unipolarity element D7, D8 are same Between another junction point side of polarity series connection.Additionally, in Fig. 1, the connection of one end of inductance L and the upper underarm of first area 12 Point side connection, the other end is connected with the primary coil 11a sides of transformator 11, but can also make one end and the secondth area of inductance L The junction point side connection of the upper underarm in domain 13, makes the other end be connected with the primary coil 11a sides of transformator 11.Inductance L is by secondary When level coil 11b connects similarly.

Switch element S1～S4, switch element S5, S6 offer of second circuit 2 respectively to the first circuit 1 of control circuit 3 Drive signal, the conducting for carrying out each switch element disconnects control.The changer of Fig. 1 makes the upper of first area 12 or second area 13 The switch element S4 or switch of the switch element S1 of arm or the underarm of switch element S3 and second area 13 or first area 12 Cell S 2 respectively becomes one group and alternate conduction disconnects.In switch element S1, S4 of groups of first circuit 1, switch element S4 or switch element S1 first disconnect, and hereafter disconnect after switch element S1 or switch element S4.Equally, another groups of first In switch element S2, S3 of circuit 1, switch element S3 or switch element S2 first disconnect, hereafter switch element S2 or switch element Disconnect after S3.

The output voltage detection means 18 of the second circuit 2 shown in Fig. 1 detect to third terminal T3 and forth terminal T4 it Between export second circuit 2 output voltage.Above-mentioned output voltage detected value input control circuit 3.Control circuit 3 is according to output Voltage detecting value, disconnects the switch element S1～S4 of the first circuit 1 and switch element S5, S6 conducting of second circuit 2, so as to The output voltage of control second circuit 2.For example, control circuit 3 carries out Pulse Width Control, to the switch element S1 of the first circuit 1～ Pulse amplitude and frequency of switch element S5, S6 of S4 and second circuit 2 etc. are modulated, so that output voltage detected value is close to Target voltage values corresponding with loading condition.Resistance is connected with outlet side, and detected by the output voltage of second circuit 2 Device 18 detects the voltage applied to above-mentioned resistance.

The pulse of the drive signal that control circuit 3 is provided by the switch element S5 or switch element S6 to second circuit 2 Control, control accumulates in the energy in inductance L from the first terminal T1 and Second terminal T2 side.In this case, groups of During the switch element S1 and switch element S4 of the first circuit 1 or switch element S2 and switch element S3 are in the conduction state, Making the switch element S5 or switch element S6 of second circuit 2 becomes conducting state, thus makes the secondary coil 11b sides of transformator 11 Become short-circuit condition.Thus, the energy being input into from the first terminal T1 and Second terminal T2 side is made to put aside in inductance L.Then, exist The switch element S1 and switch element S4 of groups of first circuit 1 or switch element S2 and switch element S3 constant conduction states Period, making the switch element S5 or switch element S6 of second circuit 2 becomes off-state.Thus, energy of the savings in inductance L Supply to third terminal T3, forth terminal T4 side.

Additionally, being less than by making above-mentioned the to the voltage exported between third terminal T3 and forth terminal T4 side when enter to exercise Switch element S5, S6 of two circuits 2 carry out turn on disconnection action obtained from output voltage action when, control circuit 3 pairs The switch element of the first circuit carries out Pulse Width Control, and makes switch element S5, S6 of second circuit with the side of not forward conduction Formula action.Specifically, it is single in the switch element S1 and switch element S4 or switch element S2 and switch of groups of first circuit During first S3 is in the conduction state, the switch element of 3 pairs of the first circuits of control circuit carries out Pulse Width Control, so that from first end Sub- T1 and the energy of Second terminal T2 side input are supplied by inductance L to third terminal T3 and forth terminal T4 side, and make the Switch element S5, S6 action in the way of not forward conduction of two circuits.In above-mentioned action, because control circuit 3 makes second The switch element S5 and switch element S6 of circuit 2 not forward conductions, so the bridge-type of second circuit 2 connects circuit as unipolarity The whole bridge rectifier circuit function of element D5～D8 conductings.

In addition, will be used to make the switch element of the first circuit 1, the drive signal of the switching means conductive of second circuit 2 For Continuity signal, the drive signal that will be used to disconnecting the switch element of the first circuit 1, the switch element of second circuit 2 as Cut-off signal, is illustrated by following action to drive signal.Voltage, electric current etc. are used as drive signal.Additionally, conducting Signal, cut-off signal etc. can always provide signal in conducting, during disconnecting, it is also possible to provide the letter of short time as triggering Number, this is not particularly limited.

Then, one of the action of the changer of first embodiment of the invention is illustrated.First, using Fig. 2 extremely Fig. 6 explanations make switch element S5, S6 of the second circuit 2 of changer carry out the situation of the action of conducting disconnection.Fig. 2 is to represent The oscillogram of of the drive signal of switch element S5, S6 of the switch element S1～S4 and second circuit 2 of one circuit 1.Fig. 3 It is the oscillogram of of exciting current of the voltage, electric current and transformator 11 of the switch element S1～S4 for representing the first circuit 1. Fig. 4 be the voltage of switch element S5, S6 for representing second circuit 2, the voltage of electric current and unipolarity element D7, D8, the one of electric current The oscillogram of example.Additionally, Fig. 5 be a part for the oscillogram for being exaggerated Fig. 3 time Tx part figure.Fig. 6 is at each moment The circuit diagram of formation.In addition, in the current waveform shown in Fig. 3 to Fig. 5, by the switch element S1～S4 of the first circuit 1, The electric current of forward flow is being used as just in switch element S5, S6 of two circuits 2, by the switch element S1～S4 of the first circuit 1, In switch element S5, S6 of two circuits 2 electric current of reverse flow and in unipolarity element D7, D8 forward flow electric current conduct It is negative.

In moment t1, to the switch element S1 and S4 of groups of first circuit 1 Continuity signal is provided.Before time tl The switch element S6 of warp-wise second circuit 2 provides Continuity signal.Thus, switch element Q1, Q4 and the positive guides of switch element Q6 It is logical.In this state, as shown in (a) of Fig. 6, using the input electric power supplied from the first terminal T1 and Second terminal T2 side, Electric current is from the lateral switch element Q1 of the first terminal T1, inductance L, primary coil 11a, switch element Q4, the flowing of Second terminal T2 side. On the secondary coil 11b sides of transformator 11, electric current is flowed by secondary coil 11b, switch element Q6, unipolarity element D8, Therefore secondary coil 11b sides become short-circuit condition.Therefore, using the input electricity supplied from the first terminal T1 and Second terminal T2 side Power, in inductance L energy is accumulated.Additionally, from capacitor 17 to third terminal T3, forth terminal T4 side provide electric power.

In moment t2, for example in order that third terminal T3 detected by the output voltage detection means 18 of second circuit, The close desired value of voltage detecting value between forth terminal T4, control circuit 3 regulation switch list from moment to second circuit 2 When first S6 provides cut-off signal, accumulate in the energy in inductance L and start to be supplied to the outlet side of second circuit 2.Such as (b) of Fig. 6 Shown, the electric current of the primary coil 11a sides of transformator 11 continues the flowing in the same paths started from moment t1, but secondary Level coil 11b side switch element Q6 become off-state.As shown in figure 4, in above-mentioned moment t2, in high current in second circuit 2 Switch element S6 in flow in the state of make switch element Q6 disconnect, so switching losses become problem.It is above-mentioned as reducing The method of switching losses, it may be considered that reduce the both end voltage of switch element S6 when switch element S6 disconnects.

In the present invention, make shnt capacitor C6 and the 4th capacitor Cd in parallel with switch element Q6, so that capacitor Capacity become big.Equally, make shnt capacitor C5 and the 3rd capacitor Cc in parallel with switch element Q5, so that the appearance of capacitor Quantitative change is big.When moment t2 disconnects switch element Q6, shown in such as (b) of Fig. 6, in secondary coil 11b sides, electric current to pair with it is disconnected The direction that shnt capacitor C6 and the 4th capacitor Cd switch element Q6 that opens in parallel is charged, from secondary coil 11b to Shnt capacitor C6 and the 4th capacitor Cd, unipolarity element D8 flow.On the other hand, discharge current from shnt capacitor C5 and 4th capacitor Cc is by third terminal T3, forth terminal T4 side, unipolarity element D8 and secondary coil 11b flowing.By making Condenser capacity becomes big, and capacitor C6 and the 4th capacitor Cd and shnt capacitor C5 and the 3rd electric capacity in parallel The discharge and recharge action of device Cc, the both end voltage that can make the switch element S6 of second circuit 2 slowly rises.Therefore, it can reduce Switching losses when the switch element S6 of second circuit 2 disconnects.

In moment t3, as the shnt capacitor C6 and the 4th capacitor Cd and shnt capacitor C5 and of second circuit 2 At the end of the discharge and recharge of three capacitor Cc, such as shown in (c) of Fig. 6, unipolarity element D5 conductings.The electric current of secondary coil 11b sides From secondary coil 11b by unipolarity element D5, third terminal T3, forth terminal T4 side and unipolarity element D8 flowing.From upper The energy accumulated in during stating moment t1 to moment t2 in inductance L is supplied to the outlet side of second circuit 2.In addition, accumulating in Outlet side from energy in above-mentioned inductance L to second circuit 2 supply during, except to third terminal T3, forth terminal Beyond the load supply of T4 connections, the capacitor 17 also to discharging during the moment t1 to moment t2 is charged.Additionally, primary During the electric current of coil 11a sides is the moment t4 disconnected from moment t1 to switch element Q4, continue in identical electric current Flow in path.

In moment t4, switch of the control circuit 3 to the first circuit 1 in switch element S1, S4 of groups of first circuit 1 Cell S 4 provides cut-off signal makes it first disconnect.Therefore, as shown in figure 3, due to making switch unit in the state of current value is larger Part Q4 disconnects, so the switch element S4 of the first circuit 1 produces switching losses when disconnecting.As the side for reducing above-mentioned switching losses Method, it may be considered that the both end voltage of the switch element S4 of the first circuit 1 when the switch element S4 for reducing the first circuit 1 disconnects.

In the present invention, relative to switch element Q4 in addition to being parallel with shnt capacitor C4, also it is parallel with second electric Container Cb, so that the capacity of capacitor becomes big.Equally, relative to switch element Q3 except be parallel with shnt capacitor C3 with Outward, the first capacitor Ca is also parallel with, so that the capacity of capacitor becomes big.Therefore, disconnect switch element Q4 in moment t4 When, shown in such as (d) of Fig. 6, in primary coil 11a sides, electric current is to pair shnt capacitor in parallel with the switch element Q4 for disconnecting The direction that C4 and the second capacitor Cb are charged, from inductance L, primary coil 11a, shnt capacitor C4 and the second capacitor Cb, Second terminal T2 and the first terminal T1 sides are flowed by switch element Q1.On the other hand, discharge current is from shnt capacitor C3 Flowed by switch element Q1, inductance L and primary coil 11a with the first capacitor Ca.Become big by making condenser capacity, and The discharge and recharge action of capacitor C4 and the second capacitor Cb and shnt capacitor C3 and the first capacitor Ca in parallel, can So that the both end voltage of switch element S4 slowly rises.Opening when therefore, it can the switch element S4 disconnections for reducing the first circuit 1 Close loss.

Electric discharge and shnt capacitor C4 and second electric in moment t5, in shnt capacitor C3 and the first capacitor Ca At the end of the charging of container Cb, such as shown in (e) of Fig. 6, the anti-parallel diodes D3 conducting in parallel with switch element Q3.First Level coil 11a sides, using the exciting current of the energy and transformator 11 accumulated in inductance L, electric current to before moment t5 The electric current identical direction flowed in primary coil 11a, inductance L, from inductance L, primary coil 11a, by reverse parallel connection two Pole pipe D3, switch element Q1 flowings.In addition, secondary coil 11b sides electric current continue from moment t3 start by secondary coil The flowing of 11b, unipolarity element D5, third terminal T3 side, forth terminal T4 side and unipolarity element D8.Electric current is in above-mentioned secondary During flowing in the current path of coil 11b sides started to hereafter in unipolarity when turning on from unipolarity element D5 Till the electric current generally zero flowed in element D5.

In moment t6, in switch element S1, S4 of groups of first circuit 1, the drive of the switch element S1 disconnected after making Dynamic signal becomes cut-off signal.Because switch element Q1 disconnects, so using the excitation of the transformator for flowing before instant t 6 Electric current, electric current is flowed from primary coil 11a by anti-parallel diodes D3, shnt capacitor C1 and inductance L, so as to parallel connection Capacitor C1 is charged.On the other hand, discharge current from shnt capacitor C2 by inductance L, primary coil 11a, reversely simultaneously The flowing of di- pole pipe D3, the first terminal T1 sides and Second terminal T2 side.Now, switch element Q1 electric current also flowing state Lower disconnection, but can be the exciting current for making above-mentioned electric current become the very little transformator 11 of numerical value.Therefore, by making switch list Disconnect after first S1, current value during disconnection can be made to diminish, so compared with when the switch element Q4 for first disconnecting disconnects, can make Switching losses diminish.

In moment t7, at the end of the discharge and recharge of shnt capacitor C1, C2, such as shown in (g) of Fig. 6, the pole of reverse parallel connection two Pipe D2 is turned on.In primary coil 11a sides, using the exciting current of transformator 11, electric current to before moment t7 in primary line The electric current identical direction flowed in circle 11a, from primary coil 11a by anti-parallel diodes D3, the first terminal T1 sides, the Two-terminal T2 sides, anti-parallel diodes D2 and inductance L flowing.In addition, the electric current of secondary coil 11b sides continues to be opened from moment t3 The stream by secondary coil 11b, unipolarity element D5, third terminal T3 side, forth terminal T4 side and unipolarity element D8 for beginning It is dynamic.Electric current is to start to hold when turning on from unipolarity element D5 during flowing in the current path of above-mentioned secondary coil 11b sides Continue to the electric current generally zero for hereafter flowing in unipolarity element D5.

In moment t8, making the drive signal of switch element S2, S3 of another groups of first circuit 1 becomes conducting letter Number.As shown in (h) of Fig. 6, in primary coil 11a sides, switch element Q2 and switch element Q3 forward conductions, electric current passes through first The flowing of terminal T1 sides, switch element Q3, primary coil 11a, inductance L, switch element Q2 and Second terminal T2 side.In secondary coil 11b sides, before moment t8, to second circuit 2 switch element S5 drive signal provide Continuity signal, such that it is able to when Carving t8 makes switch element Q5 become the state of forward conduction.Therefore, during switch element Q5 forward conductions, electric current is from secondary coil 11b is flowed by anti-parallel diodes D7 and switch element Q5, and secondary coil 11b sides become short-circuit condition.Therefore, using from The electric power being input between the first terminal T1, Second terminal T2, in inductance L energy is accumulated.

In the present invention, due to before moment t8, anti-parallel diodes in parallel with switch element Q2, Q3 respectively D2, D3 are turned on, so as shown in figure 5, can realize ZVT when switch element S2, S3 of the first circuit 1 are turned on.

Further, since before moment t8, the unipolarity element D5 conducting in parallel with switch element Q5, so switch element Q5 can be turned on no-voltage.In addition, the ZVT in order to realize switch element Q5, in leading as unipolarity element D5 During logical during the moment t3 to moment t8, provide Continuity signal as driving letter to the switch element S5 of second circuit 2 Number.

After moment t8, making switch element S2, S3 of another groups of first circuit 1 is carried out and above-mentioned groups of switch The action identical action that cell S 1, S4 is carried out from moment t1 to moment t8.That is, turn in switch element Q2 and switch element Q3 During, for example, cut-off signal is provided to the switch element S5 of second circuit 2 at the moment determined from control circuit 3, so as to make Become setting for the voltage detecting value between third terminal T3 of the outlet side of second circuit 2, forth terminal T4.Thus, to Third terminal T3, forth terminal T4 side provide the energy accumulated in inductance L.Hereafter, make in groups of switch element S2, S3 simultaneously The switch element Q3 for being associated with the first capacitor Ca first disconnects, and then disconnects switch element Q2.

In addition, in the present invention, as shown in figure 1, switch element S1, S2 series connection of rear the first circuit 1 for disconnecting.In order that Switch element S1, the S2 disconnected after above-mentioned realizes ZVT, for example, when switch element S1 is disconnected, is being located at it The both end voltage of the switch element S2 of another underarm of identical first area is dropped to after zero, is provided to switch element Q2 Continuity signal.Here, to switch element Q1 will be provided phase of the cut-off signal to Continuity signal is provided to switch element Q2 Between, i.e. switch element S1, S2 disconnect jointly during as Td.

Discharging action is carried out using the flowing of above-mentioned exciting current, the both end voltage for being discharged to above-mentioned switch element S2 declines To zero, i.e. the voltage of capacitor C2 reaches zero.Therefore, in order to the no-voltage of the switch element S2 disconnected after realizing is opened Close, it is necessary first to make exciting current become can make switch element S2 both end voltage drop to zero size.Furthermore, it is necessary to set Td during making switch element S1, S2 disconnect jointly is put, the both end voltage for enabling switch element S2 is declined using exciting current To zero.The switch element S1 of the first circuit 1 for disconnecting afterwards realizes also identical during ZVT.Setting is needed to make switch list The both end voltage of first S1 drops to the exciting current of zero size and makes Td during the common disconnection of switch element S1, S2.

In addition, if Td is set as higher value during switch element S1, S2 for making the first circuit 1 are disconnected jointly, then The both end voltage of switch element S1 or switch element S2 is dropped to after zero, and voltage rises again, i.e. capacitor C1 or capacitor C2 is electrically charged after being discharged to zero.Therefore, Td is preferably switch element S1 or opens during switch element S1, S2 disconnects jointly Close cell S 2 both end voltage drop to zero during degree.Additionally, the electric capacity in parallel with switch element Q1, Q2 of rear disconnection Shnt capacitor C1, C2 of the capacity of device becomes the less capability value such as the built-in parasitic capacitance of switch element S1, S2, so Deviation is had according to part.Therefore, it can the built-in parasitic capacitance of switch element S1, S2 with the capacitor being separately provided simultaneously Connection, thus using combined capacity as above-mentioned shnt capacitor C1, C2.

Then, using the converter circuit figure and Fig. 7 to Figure 10 of Fig. 1, illustrate to make third terminal T3 and forth terminal T4 it Between output voltage less than by make above-mentioned second circuit 2 switch element S5, S6 turn on disconnect action obtained from output electricity During pressure, using second circuit 2 as whole bridge rectifier circuit function action.Fig. 7 is to represent first electric in above-mentioned action The oscillogram of of the drive signal of switch element S5, S6 of the switch element S1～S4 and second circuit 2 on road 1.Fig. 8 is table Show the voltage, electric current and transformator 11 of the switch element S1～S4 of the first circuit 1 in above-mentioned action one of exciting current Oscillogram.Fig. 9 be the voltage of the unipolarity element D5～D8 for representing the second circuit 2 in above-mentioned action, one of electric current Oscillogram.Additionally, the circuit diagram that the above-mentioned action that Figure 10 is the changer of first embodiment of the invention is formed at each moment.Separately Outward, in the current waveform shown in Fig. 8, Fig. 9, the electric current of the forward flow in the switch element S1～S4 of the first circuit 1 is made For just, by the electric current of reverse flow in the switch element S1～S4 of the first circuit 1 and in unipolarity element D5～D8 it is positive The electric current of flowing is used as negative.

In the case of above-mentioned action, in the converter circuit of Fig. 1, the bridge-type of second circuit 2 connects circuit as list The whole bridge rectifier circuit function of tropism element D5～D8 conductings.Therefore, as long as the changer second circuit of embodiment 1 2 at least have unipolarity element D5～D8, so as shown in fig. 7, switch element S5 and switch not to second circuit 2 are single The drive signal of first S6 provides Continuity signal.

In moment t21, the drive signal to the switch element S1 and switch element S4 of groups of first circuit 1 provides conducting Signal.Now, not to the switch element S5 and switch element S6 offer Continuity signal of second circuit 2.As shown in (a) of Figure 10, In the primary coil 11a sides of transformator 11, electric current from the lateral switch element Q1 of the first terminal T1, inductance L, primary coil 11a, open Close element Q4 and the flowing of Second terminal T2 side.In the secondary coil 11b sides of transformator 11, electric current is from secondary coil 11b by single Tropism element D5, third terminal T3, forth terminal T4 side, unipolarity element D8 flowings.From the first terminal T1 and Second terminal T2 The input electric power of side supply is supplied by inductance L to third terminal T3, forth terminal T4 side.

In moment t22, for example, what control circuit 3 first disconnected in switch element S1, S4 of groups of first circuit 1 opens Close cell S 4 provide cut-off signal so that the output voltage detection means 18 of second circuit detect third terminal T3, the 4th The close desired value of voltage detecting value between terminal T4.Therefore, as shown in figure 8, because switch element Q4 is in the larger shape of current value Disconnect under state, so producing switching losses when switch element S4 disconnects.In the present invention, as making above-mentioned second circuit 2 As illustrating in the action that switch element S5, S6 conducting disconnects, relative to switch element Q4 except being parallel with shnt capacitor Beyond C4, the second capacitor Cb is also parallel with, so that the capacity of capacitor becomes big.Equally, relative to switch element Q3 except It is parallel with beyond shnt capacitor C3, is also parallel with the first capacitor Ca, so that the capacity of capacitor becomes big.

Therefore, in moment t22, when switch element Q4 disconnects, shown in such as (b) of Figure 10, in primary coil 11a sides, electric current To pair direction being charged with the switch element Q4 shnt capacitor C4 in parallel and the second capacitor Cb that disconnect, from inductance L, Primary coil 11a, shnt capacitor C4 and the second capacitor Cb, Second terminal T2 and the first terminal T1 sides pass through switch element Q1 Flowing.On the other hand, discharge current passes through switch element Q1, inductance L and primary from shnt capacitor C3 and the first capacitor Ca Coil 11a flows.The capacity for making the capacitor in parallel with switch element S4, S3 of the first circuit 1 for first disconnecting becomes big, and makes The rising of the both end voltage of switch element S4 slows down, and switch when disconnecting so as to the switch element S4 for reducing the first circuit 1 is damaged Lose.

In moment t23, the electric discharge of shnt capacitor C3 and the first capacitor Ca and shnt capacitor C4 and the second electric capacity At the end of the charging of device Cb, such as shown in (c) of Figure 10, the anti-parallel diodes D3 conducting in parallel with switch element Q3.First Level coil 11a sides, using the exciting current of the energy and transformator 11 accumulated in inductance L, electric current to before moment t5 The electric current identical direction flowed in primary coil 11a, inductance L, from inductance L, primary coil 11a the pole of reverse parallel connection two is passed through Pipe D3, switch element Q1 flow.In addition, secondary coil 11b sides electric current continue from moment t21 start by secondary coil The flowing of 11b, unipolarity element D5, third terminal T3 side, forth terminal T4 side and unipolarity element D8.

In moment t24, the driving of the switch element S1 disconnected after making in switch element S1, S4 of groups of first circuit 1 Signal becomes cut-off signal.Because switch element Q1 disconnects, so using the excitation electricity of the transformator flowed before moment t23 Stream, shown in such as (d) of Figure 10, electric current passes through anti-parallel diodes D3, shnt capacitor C1 and inductance L from primary coil 11a Flowing, so as to be charged to shnt capacitor C1.On the other hand, discharge current passes through inductance L, primary from shnt capacitor C2 The flowing of coil 11a, anti-parallel diodes D3, the first terminal T1 and Second terminal T2 side.Now, although switch element Q1 is in electricity Stream disconnects also in the state of flowing, but little when can be the switch element Q4 for making current value ratio first disconnect.Thus, with first disconnect Switch element Q4 compare when disconnecting, the switching losses of switch element Q1 disconnected after can making diminish.

At the end of moment t25, the discharge and recharge of shnt capacitor C1, C2, such as shown in (e) of Figure 10, the pole of reverse parallel connection two Pipe D2 is turned on.In primary coil 11a sides, using the exciting current of transformator 11, electric current to before moment t25 in primary line Circle 11a in flow electric current identical direction, from primary coil 11a by anti-parallel diodes D3, the first terminal T1, second Terminal T2 sides, anti-parallel diodes D2 and inductance L flowing.In addition, the electric current of secondary coil 11b sides continues to be opened from moment t21 The stream by secondary coil 11b, unipolarity element D5, third terminal T3 side, forth terminal T4 side and unipolarity element D8 for beginning It is dynamic.

In moment t26, to switch element S2, S3 of another groups of first circuit 1 Continuity signal is provided.Such as Figure 10 Shown in (f), in primary coil 11a sides, switch element Q2 and switch element Q3 forward conductions, electric current by the first terminal T1 sides, The flowing of switch element Q3, primary coil 11a, inductance L, switch element Q2 and Second terminal T2 side.Due in primary coil 11a The electric current of flowing is with flow direction so far conversely, so in secondary coil 11b sides, unipolarity element D6, unipolarity unit Part D7 forward conductions, electric current passes through unipolarity element D7, third terminal T3, forth terminal T4 side, unipolarity from secondary coil 11b Element D6 flows.It is identical with the situation of (a) of Figure 10, from the electric power being input between the first terminal T1, Second terminal T2 by electricity Sense L to third terminal T3, forth terminal T4 side supply.

It is same with during the action for disconnecting switch element S5, S6 conducting of above-mentioned second circuit 2, make second circuit 2 Bridge-type connects in action of the circuit as whole bridge rectifier circuit function, due to first with switch respectively before moment t26 Anti-parallel diodes D2, D3 conducting part Q2, Q3 in parallel, so as shown in figure 8, switch element S2, S3 of the first circuit 1 exist ZVT can be realized during conducting.

The action of switch element S2, S3 of another groups of first circuit 1 after moment t26 groups of is opened with above-mentioned Close cell S 1, S4 identical to the action of moment t26 from moment t21.I.e., for example, control circuit 3 make groups of switch element S2, The switch element Q3 in parallel with the first capacitor Ca in S3 first disconnects, and afterwards disconnects switch element Q2, thus makes the 3rd end Output voltage between sub- T3, forth terminal T4 becomes desired value.

In the changer of above-mentioned first embodiment, enter exercise above-mentioned second circuit 2 bridge-type connection circuit conduct During the action of whole bridge rectifier circuit function, even if adjusting to the pulse amplitude and frequency of the switch element of the first circuit System, when being nor close to desired value from the detected value of the voltage exported between third terminal T3, forth terminal T4, control circuit 3 switch to the action for disconnecting switch element S5, S6 conducting of second circuit 2.Conversely, exercising above-mentioned second circuit 2 entering During the action that switch element S5, S6 conducting disconnects, even if the pulse amplitude and frequency to switch element S5, S6 of second circuit 2 It is modulated, when being nor close to desired value from the detected value of the voltage exported between third terminal T3, forth terminal T4, control electricity Road 3 switches to makes the bridge-type of second circuit 2 connect circuit as the action of whole bridge rectifier circuit function.By to two Action is switched over, with the number of turns of transformator 11 than etc. circuit constant and loading condition it is unrelated, can correspond to be input on a large scale Output voltage electric current.

In addition, same when turning on the action for disconnecting with switch element S5, the S6 for making above-mentioned second circuit 2, make it is second electric In action of the bridge-type connection circuit on road 2 as whole bridge rectifier circuit function, the groups of switch element of the first circuit 1 In the capacitor in parallel with the switch element for first disconnecting capacity more than the capacitor in parallel with the switch element of rear disconnection Capacity.Additionally, in order that switch element S1, S2 of rear the first circuit 1 for disconnecting realize ZVT, it is necessary first to make excitation Electric current become can make switch element S2 or switch element S1 both end voltage drop to zero size.Furthermore, it is necessary to arrange make Td during the common disconnection of switch element S1, S2, the both end voltage for enabling switch element S2 or switch element S1 passes through excitation Electric current drops to zero.

Td is preferably switch element S1 or switch element during switch element S1, S2 of the first circuit 1 is disconnected jointly The both end voltage of S2 drop to zero during degree.Additionally, the appearance of the capacitor in parallel with switch element Q1, Q2 of rear disconnection Shnt capacitor C1, C2 of amount becomes the less capability value such as the built-in parasitic capacitance of switch element S1, S2, so according to portion There is deviation in part.Therefore, it can the built-in parasitic capacitance of switch element S1, S2 is in parallel with the capacitor being separately provided, by This is using combined capacity as above-mentioned shnt capacitor C1, C2.

In addition, illustrating of following action in Fig. 2, Fig. 7：There is provided as first simultaneously in moment t8, moment t26 The Continuity signal of the drive signal of switch element S2, S3 of circuit 1, and switch element Q2 and switch element Q3 start positive guide It is logical.But, however it is not limited to of the action of above-mentioned embodiment, there is provided the time point of the Continuity signal of switch element S2, S3 Can not simultaneously.Further it is provided that the time point of the Continuity signal of switch element S2, S3 can also be anti-parallel diodes D2, D3 During conducting.In this case, there is provided the time point and switch element Q2 of the Continuity signal of switch element S2, S3 and switch unit The time point that part Q3 starts forward conduction is inconsistent, for example, make anti-parallel diodes D2, D3 turn on electric current reach zero it Afterwards, electric current starts forward direction and flows through switch element Q2 and switch element Q3.Additionally, switch element Q2 when reverse direction current flow, The voltage of Q3 is dropped by less than the forward voltage declined as the voltage of anti-parallel diodes D2, D3 during electric current forward flow When, Continuity signal can be provided to switch element S2, S3, switch element Q2, Q3 reverse-conducting is made, so as to reduce switch element The conduction losses of S2, S3.The situation of switch element S1, S4 of another groups of first circuit 1 is similarly.

Switch element S1, S4 and switch element S2 in the above-described first embodiment, in groups of first circuit 1, Switch element S4, S3 that the upper underarm of second area 13 is made in S3 first disconnects, but can also make the upper underarm of first area 12 Switch element S1, S2 first disconnect.In this case, make the first capacitor Ca, the second capacitor Cb respectively with first disconnect Switch element S1, S2 connect.Additionally, the switch element of the first circuit 1 for first disconnecting can be first area 12 and second area Switch element S1, S3 of 13 upper arm or can be first area 12 and second area 13 underarm switch element S2, S4.In this case, make the first capacitor Ca, the second capacitor Cb respectively with switch element S1, the S3 or switch for first disconnecting Cell S 2, S4 is in parallel.

Additionally, in the above-described first embodiment, in the bridge-type connection circuit of the second circuit 2 shown in Fig. 1, it is connected to The series circuit of switch element S5, S6 between third terminal T3, forth terminal T4 and the series circuit of unipolarity element D7, D8 Position can be exchanged.In this case, the second circuit that the 3rd capacitor Cc, the 4th capacitor Cd also disconnect respectively with conducting 2 switch element S5, S6 is in parallel.Additionally, second circuit 2 can be the circuit of mixing bridge type connection constitute, by unipolarity element The series circuit of the switch element S5 or switch element S6 of D7 or unipolarity element D8 and second circuit 2 is connected to the 3rd end Between sub- T3, forth terminal T4.In this case, the 3rd capacitor Cc, the 4th capacitor Cd also disconnect respectively with conducting Switch element S5, S6 of second circuit 2 is in parallel.

Additionally, in the explanation of above-mentioned embodiment 1, using diode as the unipolarity element D7 of second circuit 2, unidirectionally Property element D8, but be not restricted to that above-mentioned one, as long as make the element that electric current is turned on to a direction.Additionally, conduct Unipolarity element, can be with switch element S5, S6 equally using the internal body diodes of switch element.By above-mentioned second circuit 2 Bridge-type connection explanation of the circuit as the action of whole bridge rectifier circuit function in, can be in unipolarity element D5, D6 During conducting, for example, to switch element S5, S6 of Fig. 1 Continuity signal is provided, make switch element Q5, Q6 reversely, i.e. unipolarity Element D5, D6 forward conduction.The voltage of switch element Q5, Q6 when reverse direction current flow is dropped by less than as electric current forward stream During the forward voltage that the voltage of reverse unipolarity element D5, D6 when dynamic declines, unipolarity element D5, D6 can be further reduced Conduction losses.Equally, using switch element S7, S8 or in parallel with unipolarity element D7, D8 comprising unipolarity element D7, D8 Switch element S7, S8 when, it is also possible to switch element Q7, Q8 reverse-conducting is made, so as to further reduce unipolarity element D7, D8 Conduction losses.In addition, when above-mentioned changer only makes to be less than to the voltage exported between third terminal T3 and forth terminal T4 When used in the action of output voltage by obtained from switch element S5, S6 for making second circuit 2 turn on the action for disconnecting, as long as Second circuit 2 at least have as whole bridge rectifier circuit action unipolarity element D5～D8 or make electric current to unipolarity unit The switch element of the positive identical direction flowing of part D5～D8.

The changer of the present invention is made using the inductance being connected with the primary coil or second coil side of transformator by realization Action and the bridge-type of second circuit is connected into circuit as whole bridge rectifier circuit that the switching means conductive of second circuit disconnects The action of function, can correspond to large-scale input and output voltage electric current.Furthermore, it is possible to reduce the state in electric current flowing Under make the switching losses that switch element produces when disconnecting, and can reduce making in the switch element of groups of first circuit The switching losses produced when disconnecting after individual.Additionally, by realizing ZVT, it is possible to achieve reduce switching losses.

(second embodiment)

Figure 11 represents the electrical circuit diagram of the reversible transducer of second embodiment of the invention.In the second embodiment party of the invention In the reversible transducer of formula, represent that identical is constituted with the reference identical element of the changer of first embodiment Key element.Here, the main pair of composition different from the changer of first embodiment and action are illustrated.

In the reversible transducer of second embodiment, in order to carry out bidirectional-movement, second circuit is same with the first circuit The composition of sample.Therefore, Tu11Zhong, second circuit 22 is constituted switch element as the circuit of the upper underarm in two regions.This Outward, drive signal is provided to switch element S7, S8 of second circuit 22 in this control circuit 23.In addition, the first of the first circuit 1 3rd region 24 and the composition shown in the Fig. 1 described in first embodiment of region 12, second area 13 and second circuit 22 It is identical.Additionally, same with Fig. 1, in fig. 11, inductance L is connected with primary coil 11a sides, but can also be with secondary coil 11b Side connects.

In first circuit 1 in switch element S1, S4 and switch element S2, S3 of groups of first circuit 1, first disconnect The upper underarm in a region, here for the upper underarm of second area 13 switch element S3, S4 series connection.First for first disconnecting is electric Switch element S3, the S4 on road 1 is in parallel with first, second capacitor Ca, Cb respectively.

As shown in figure 11, the 3rd region 24 of second circuit 22, the 4th region 25 are connected in parallel on respectively third terminal T3 and Between four terminal T4.3rd region 24, the 4th region 25 become the circuit of the full-bridge type connection being made up of switch element S5～S8. Additionally, switch element S5～S8 be parallel with respectively switch element Q5～Q8, unipolarity element D5～D8 and shnt capacitor C5～ C8.In addition, same with first embodiment, as shown in figure 11, unipolarity element D5～D8 can opening using second circuit 22 Close the diode-built-in of 5～S8 of cell S, it is also possible to using the switch element S5～independent peripheral hardwares of S8 relative to second circuit 22 Diode, can also be combinations thereof.Equally, as shown in figure 11, shnt capacitor C5～C8 can use second circuit 22 Switch element S5～S8 parasitic capacitance, it is also possible to using relative to second circuit 22 switch element S5～independent peripheral hardwares of S8 Capacitor, can also be combinations thereof.

When from second circuit 22 to the side of the first circuit 1 provide electric power when, in second circuit 22 groups of switch element S5, In S8 and switch element S6, S7, the upper underarm in the region for first disconnecting, the upper underarm herein for the 3rd region 24 are opened Close the series connection of cell S 5, S6.Switch element S5, the S6 for first disconnecting is in parallel with the three, the 4th capacitor Cc, Cd respectively.

When electric power is provided from the first circuit 1 to the side of second circuit 22, carry out same with the record in above-mentioned embodiment 1 Action.Additionally, when from second circuit 22 to the side of the first circuit 1 provide electric power when, control circuit 23 make in second circuit 22 into Group switch element S5, S8 and switch element S6, S7 in be parallel with respectively the three, the 4th capacitor Cc, Cd switch element S5, S6 first disconnects.

When electric power is provided from the first circuit 1 to the side of second circuit 22, opening for the second circuit 22 as outlet side is made It is same with first embodiment when closing unit conducting and disconnecting, control circuit 23 make second circuit 22 to be parallel with the three, the 4th electric Switch element S5, S6 conducting of container Cc, Cd disconnects.Additionally, when electric power is provided from second circuit 22 to the side of the first circuit 1, When the disconnection of the switching means conductive of the first circuit 1 of outlet side is become, control circuit 23 makes parallel connection respectively in the first circuit 1 Switch element S3, S4 conducting for having first circuit 1 of first, second capacitor Ca, Cb disconnects.In addition, working as to enter to exercise outlet side Voltage less than by obtained from the action that the switching means conductive for making second circuit or the first circuit disconnects output voltage move When making, as described in first embodiment, the switch element S5～S8 or the first circuit 1 of the second circuit 22 of outlet side Switch element S1～S4 as rectification circuit function.

Additionally, entering to exercise the action of the circuit 1 of second circuit 22 or first as rectification circuit function of outlet side When, even if the pulse amplitude and frequency of the first circuit 1 or the switch element of second circuit 22 are modulated, but from third terminal The detected value of the voltage exported between T3, forth terminal T4 or between the first terminal T1, Second terminal T2 still keeps off target During value, control circuit 23 switches to the action that the switching means conductive of the circuit 1 of second circuit 22 or first for making outlet side disconnects.

Specifically, when electric power is provided from the first circuit 1 to the side of second circuit 22,23 pairs of the first circuits 1 of control circuit Switch element S4 or switch element S3 carry out Pulse Width Control so that groups of first circuit switch element S1, S4 or open Energy that cell S 2, S3 period in the conduction state is input into from the first terminal T1 and Second terminal T2 side is closed by inductance L to the Three terminal T3 and forth terminal T4 side supply.Now, switch element S5, S6 of second circuit 22 not forward conduction is made.From above-mentioned State, the switch element S5 or switch element S6 of the second circuit 22 for making to be parallel with the 3rd capacitor Cc or the 4th capacitor Cd are just To conducting so that groups of first circuit switch element S1, S4 or switch element S2, S3 period in the conduction state from The energy deposition of one terminal T1 and the input of Second terminal T2 side is in inductance L.Afterwards, switch in the first circuit for making first to disconnect 1 switch element S4 or switch element S3 makes the switch element S6 or switch element of the second circuit 22 of forward conduction before disconnecting The action that S5 disconnects.

Conversely, when entering to exercise the action of the switching means conductive of the circuit 1 of second circuit 22 or first of outlet side disconnection, Even if the pulse amplitude and frequency of the switch element of the circuit 1 of second circuit 22 or first are modulated, but from third terminal T3, The detected value of the voltage exported between forth terminal T4 or between the first terminal T1, Second terminal T2 still keeps off desired value When, control circuit 23 switches to the action for making the circuit 1 of second circuit 22 or first of outlet side as rectification circuit function.

Specifically, when providing electric power from the first circuit 1 to the side of second circuit 22, control circuit 23 makes to be parallel with the 3rd electric The switch element S5 or switch element S6 forward conductions of the second circuit 22 of container Cc or the 4th capacitor Cd, so that groups of Switch element S1, S4 of first circuit 1 or switch element S2, S3 period in the conduction state are from the first terminal T1 and Second terminal The energy deposition of T2 sides input is in inductance L.Now, the pulse of the switch element S6 or switch element S5 of second circuit 22 is carried out Control, made the second electric of forward conduction before the switch element S4 or switch element S3 of the first circuit 1 for making first to disconnect disconnect The switch element S6 or switch element S5 on road 22 disconnects.Then, the switch element for making second circuit 22 is switched to from above-mentioned action The not action of forward conduction, so as to be in switch element S1, S4 or switch element S2, S3 of groups of first circuit 1 The energy being input into from the first terminal T1 and Second terminal T2 side during state passes through inductance L to third terminal T3 and forth terminal T4 Side supplies.

In the above described manner switching action, carries out the first circuit, the Pulse Width Control of the switch element of second circuit, makes from 3rd, the close desired value of detected value of the voltage exported between forth terminal or between first, second terminal.Moved by switching above-mentioned two Make, with the number of turns of transformator than etc. circuit constant and loading condition it is unrelated, large-scale input and output voltage electric current can be corresponded to.

As described above, in the present invention, in the groups of switch element of first or second circuit of input side, and first break Capacity of the capacity of the capacitor of the switch element parallel connection opened more than the capacitor in parallel with the switch element of rear disconnection.Equally, The second circuit of outlet side or the switch element of the first circuit that conducting disconnects also is parallel with capacitor.Thus, it is possible to reduce by The switching losses that produce when switch element, the switching means conductive of second circuit of one circuit, when disconnecting.

Additionally, in order that the switch element S7 of switch element S1, S2 of rear the first circuit 1 for disconnecting or second circuit 22, S8 realizes ZVT, for example, disconnects in the switch element S7 of the switch element S1 or second circuit 22 for making the first circuit 1 When, need the first switch element S2 of circuit 1 in another arm that identical region is in it or opening for second circuit 22 The both end voltage for closing cell S 8 drops to zero backward switch element Q2 or switch element Q8 offer Continuity signal.Encouraged using above-mentioned The flowing of magnetoelectricity stream carries out discharging action, and is discharged to the switch element S2 of above-mentioned first circuit 1 or the switch of second circuit 22 Till the both end voltage of cell S 8, the i.e. voltage of capacitor C2 or capacitor C8 reach zero.

Thus, for the switch element S8 of the switch element S2 of the first circuit 1 of disconnection or second circuit 22 after realizing ZVT, it is necessary first to which becoming exciting current can make the first switch element S2 of circuit 1 or opening for second circuit 22 The both end voltage for closing cell S 8 drops to zero size.Furthermore, it is necessary to arrange make switch element S1, S2 of the first circuit 1 or Switch element S7, S8 of two circuits 22 jointly disconnect during Td, make the switch element S2 or second circuit 22 of the first circuit 1 The both end voltage of switch element S8 can drop to zero using exciting current.The switch element S1 of the first circuit 1 for disconnecting afterwards, When the switch element S7 of two circuits 22 realizes ZVT similarly.Need to arrange the switch element that can make the first circuit 1 The both end voltage of the switch element S7 of S1 or second circuit 22 drops to the exciting current of zero size and makes opening for the first circuit 1 Td during closing the common disconnection of switch element S7, S8 of cell S 1, S2 or second circuit 22.

In addition, if Td is set as larger value during switch element S1, S2 for making the first circuit 1 are disconnected jointly, Then drop to after zero in the both end voltage of switch element S1 or switch element S2, voltage rises again, i.e. capacitor C1 or electricity Container C2 is electrically charged after being discharged to zero.Therefore, Td is preferably switch element S1 during switch element S1, S2 disconnects jointly Or the both end voltage of switch element S2 drop to zero during degree.Switch element S7, S8 of second circuit 22 is similarly.This Outward, shnt capacitor C1, C2 of the capacity of the capacitor in parallel with switch element Q1, Q2 of rear disconnection becomes the first circuit 1 The less capability value such as the built-in parasitic capacitance of switch element S1, S2, therefore deviation is had according to part.Therefore, it can will The parasitic capacitance that switch element S1, S2 of first circuit 1 are built-in is in parallel with the capacitor being separately provided, using combined capacity as upper State shnt capacitor C1, C2.Shnt capacitor C7, C8 of second circuit 22 is similarly.

In above description of the invention, in order that exciting current becomes appropriate size, the primary line with transformator 11 The inductance composition that circle or parallel connection of secondary windings are arranged is also contained in the magnetizing inductance of above-mentioned transformator.Additionally, in described above In, the combination inductance formed using the inductance composition of the magnetizing inductance by transformator 11 and setting connected in parallel and the electric current for flowing In being also contained in above-mentioned exciting current.The magnetizing inductance of transformator for example can be using between magnetic core in the structure of transformator Away from, the number of turns of coil, the material of magnetic core etc. be adjusted.

In above-mentioned first, second embodiment, control circuit 3,23 is made by the output voltage detection means of second circuit 18th, the close desired value of magnitude of voltage that the output voltage detection means 19 of the first circuit is detected, but the detected value for using except Can be output current value or output power, can also be combinations thereof.Equally, it is also possible to make voltage, the electric current of input side Or the close desired value of detected value of electric power.In addition, in general, as the detected value of electric power, using the voltage to detecting and Electric current carries out the value of calculation of multiplication calculating.The detected value of voltage, electric current or electric power in above-mentioned output or the voltage of input, In the detected value of electric current or electric power, calculate comprising the multiplication and division by a certain coefficient of above-mentioned value multiplication and division or carry out plus-minus meter with a certain value Calculation etc. is worth obtained from calculating.

The present invention makes outlet side using the inductance being connected with the primary coil or second coil side of transformator by realization Action that the switching means conductive of second circuit or the first circuit disconnects and using the second circuit of outlet side or the first circuit as The action of rectification circuit function, can correspond to large-scale input and output voltage electric current.Furthermore, it is possible to reduce in electric current stream The switching losses for making switch element produce when disconnecting in the state of dynamic, and can reduce making the switch list of groups of first circuit The switching losses that in unit produces when disconnecting afterwards.Additionally, by realizing ZVT, it is possible to achieve reduce switch and damage Lose.

In the electric circuit of the present invention, junction point refers to electrical connection and becomes idiostatic position, does not imply that thing Reason junction point.Additionally, the composition of each several part in the changer and reversible transducer of the present invention, structure, quantity, configuration, shape, Material etc. is not limited to above-mentioned specific example, and those skilled in the art can carry out appropriate selection, as long as comprising the present invention's Objective, is included in the scope of the present invention.

More specifically, for example, element for being illustrated using reference as semiconductor element etc. is not limited to Specific electrical equipment is stated, be may be constructed comprising single electrical equipment or multiple electric units with same function or effect The electric circuit of part, above-mentioned whole deformation is within the scope of the present invention.Equally, with diode, capacitor, switch element Quantity and configuration relation for each component of representative etc., those skilled in the art have carried out the content of appropriately designed change Within the scope of the present invention.

Claims

1. a kind of changer, it is characterised in that include：

Transformator, with primary coil and secondary coil；

First circuit, is connected with the primary side, and has：First area and second area, are connected in parallel on respectively first end Between son and Second terminal, and using switch element as upper underarm, the switch element has and is parallel with reverse parallel connection respectively The switch element of diode and shnt capacitor；First capacitor, with the first area or the upper underarm of second area One switch element parallel connection of the upper arm or underarm of individual switch element or the first area and second area；And second electric capacity Device, with another switch element or the first area of the first area or the upper underarm of second area and second area Another switch element of upper arm or underarm is in parallel；

Second circuit, is connected with the second coil side, and has：Bridge-type connects circuit, and in bridge-type the transformator is connected to The unipolarity element of secondary coil at least two in the unipolarity element between third terminal and forth terminal difference Switch element is parallel with, the switch element includes the switch element for being parallel with shnt capacitor respectively；And the 3rd capacitor With the 4th capacitor, it is at least in parallel with two switch elements respectively；

Inductance, passes through between the junction point of the upper underarm of the junction point and the second area of the upper underarm of the first area The primary coil connection, or connect the company of the same polarity series connection between the unipolarity element in circuit in the bridge-type Connected by the secondary coil between another junction point of same polarity series connection between contact and the unipolarity element；And

Control circuit, makes switch element and the second area or the first area of the upper arm of the first area or second area Underarm switch element in groups alternate conduction disconnect, the direct current being input into from first, second terminals side is converted to into exchange And from first circuit output, when the control for exercising the groups of switch element alternate conduction disconnection is entered, make to be in and lead The switch element of the upper arm of the described groups of first area or second area of logical state and the second area or first The switch element that first capacitor or second capacitor are parallel with the switch element of the underarm in region first breaks Open,

The control circuit in the switch element period in the conduction state of groups of first circuit so that from described First, the mode of the energy deposition in the inductance of Second terminal side input, makes to be parallel with the 3rd capacitor or the 4th electric The switch element forward conduction of container, and before the switch element for making first circuit for first disconnecting disconnects, make The switch element of the second circuit of the forward conduction disconnects so that from described the export between three, forth terminal voltage, The detected value or close from the detected value of the voltage, electric current or electric power being input between first, second terminal of electric current or electric power Desired value.

2. changer according to claim 1, it is characterised in that

With the switch unit of the switch element of first circuit for first disconnecting in the switch element of groups of first circuit The joint capacity of the part shnt capacitor in parallel and first capacitor or the second capacitor, more than the institute with rear disconnection The capacity of the shnt capacitor of the switch element parallel connection of the switch element of the first circuit is stated,

The transformator has magnetizing inductance, and the magnetizing inductance makes the size discharged the electric charge of the shnt capacitor Exciting current flowing so that with the switch element of the switch element of first circuit of rear disconnection be located at same area it is another It is attached that the both end voltage of the switch element of the switch element of the one upper arm or underarm shnt capacitor in parallel drops to zero Closely,

The control circuit arranges following period：Until the switch element position with the switch element of first circuit of rear disconnection In the two ends of the switch element of the switch element of another upper arm or underarm of the same area shnt capacitor in parallel Till voltage drops to zero because of the exciting current nearby, the switch unit of the switch element of rear first circuit for disconnecting is made During part and the switch element for being located at the switch element of another upper arm or underarm of same area with it disconnect jointly.

3. changer according to claim 1, it is characterised in that

The anti-parallel diodes in parallel with the switch element of the switch element of first circuit are described first The diode-built-in of the switch element of circuit, relative to first circuit the independent peripheral hardware of switch element diode or it Combination, the shnt capacitor in parallel with the switch element of the switch element of first circuit is described first The parasitic capacitance of the switch element of circuit, relative to first circuit the independent peripheral hardware of switch element capacitor or they Combination,

The unipolarity element in parallel with the switch element of the switch element of the second circuit is the second circuit Switch element diode-built-in, relative to the second circuit the independent peripheral hardware of switch element diode or they Combination, the shnt capacitor in parallel with the switch element of the switch element of the second circuit is opening for the second circuit Close unit parasitic capacitance, relative to the second circuit the independent peripheral hardware of switch element capacitor or combinations thereof.

4. a kind of changer, it is characterised in that include：

Transformator, with primary coil and secondary coil；

The control circuit in the switch element period in the conduction state of groups of first circuit so that from described First, the energy of Second terminal side input makes described second the inductance to by way of the supply of the described 3rd, forth terminal side The switch element of circuit not forward conduction, so that from the described the voltage, electric current or electric power exported between three, forth terminal Detected value or the close desired value of detected value from the voltage, electric current or electric power being input between first, second terminal.

5. changer according to claim 4, it is characterised in that

6. changer according to claim 4, it is characterised in that

7. a kind of changer, it is characterised in that include：

Transformator, with primary coil and secondary coil；

The control circuit is from following action：In the switch element period in the conduction state of groups of first circuit, with Make the energy being input into from first, second terminals side the inductance to by way of the supply of the described 3rd, forth terminal side, Carry out Pulse Width Control to the switch element of first circuit, and make the switch element of the second circuit not forward conduction, Switch to following action：In the switch element period in the conduction state of groups of first circuit, so that from described first, Mode of the energy deposition of Second terminal side input in the inductance, makes to be parallel with the 3rd capacitor or the 4th capacitor The second circuit switch element forward conduction, and disconnect it in the switch element for making first circuit for first disconnecting Before, the switch element for making the second circuit of the forward conduction disconnects, so that from the output between three, forth terminal The detected value of voltage, electric current or electric power or the detected value from the voltage, electric current or electric power being input between first, second terminal Close desired value.

8. changer according to claim 7, it is characterised in that

9. changer according to claim 7, it is characterised in that

10. a kind of changer, it is characterised in that include：

Transformator, with primary coil and secondary coil；

The control circuit is from following action：In the switch element period in the conduction state of groups of first circuit, with Mode of the energy deposition in the inductance from first, second terminals side input is made, makes to be parallel with the 3rd electric capacity The switch element forward conduction of the second circuit of device or the 4th capacitor, and make first circuit for first disconnecting Before switch element disconnects, enter the second circuit that the switch element of the second circuit for exercising the forward conduction disconnects and open The Pulse Width Control of unit is closed, following action is switched to：In the switch element phase in the conduction state of groups of first circuit Between, so as to supplied to the described 3rd, forth terminal side by the inductance from the energy of first, second terminals side input Mode, makes the switch element of the second circuit not forward conduction, so that from the described the electricity exported between three, forth terminal The detected value of pressure, electric current or electric power or the detected value from the voltage, electric current or electric power that are input between first, second terminal connect Close-target value.

11. changers according to claim 10, it is characterised in that

12. changers according to claim 10, it is characterised in that

13. a kind of reversible transducers, it is characterised in that with the changer described in any one in claim 1 to 12,

The upper underarm of the first area or second area as first circuit, will be parallel with first capacitor The switch element of the switch element of first circuit and first circuit for being parallel with second capacitor connects,

The bridge-type of the second circuit connects circuit by the 3rd area being connected in parallel on respectively between third terminal and forth terminal Domain and the 4th region composition, the 3rd region and the 4th region are using the switch element of the second circuit as upper underarm, institute The switch element for stating second circuit has the switch unit for being parallel with the unipolarity element and the shnt capacitor respectively Part, as underarm on the 3rd region or four-range, will be parallel with the second circuit of the 3rd capacitor The switch element of switch element and the second circuit for being parallel with the 4th capacitor connects,

The control circuit makes the switch element and the described 4th of the second circuit of the 3rd region or four-range upper arm In groups alternate conduction disconnects the switch element of the second circuit of the underarm in region or the 3rd region, will be from the three, the 4th end The direct current of sub- side input is converted to exchange and from second circuit output, when entering the switch of exercising the groups of second circuit During the control that units alternately conducting disconnects, make on described groups of described 3rd region in the conduction state or four-range In the switch element of the second circuit of the underarm in the switch element of the second circuit of arm and the 4th region or the 3rd region, and The switch element for being associated with the second circuit of the 3rd capacitor or the 4th capacitor first disconnects.