CN106803722B - Power inverter - Google Patents
Power inverter Download PDFInfo
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- CN106803722B CN106803722B CN201510844089.4A CN201510844089A CN106803722B CN 106803722 B CN106803722 B CN 106803722B CN 201510844089 A CN201510844089 A CN 201510844089A CN 106803722 B CN106803722 B CN 106803722B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
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Abstract
The power inverter of embodiments of the present invention includes: first switching element and second switch element, and the second switch element is connected via the first tie point with the first switching element；First rectifier cell and the second rectifier cell, second rectifier cell are connected via the second tie point with first rectifier cell；Capacitor is arranged in parallel with first rectifier cell and the second rectifier cell；Output voltage test section is arranged in parallel with the capacitor；AC power source is connected between first tie point and second tie point with current detecting part and inductor；Polarity judging part judges the polarity of the AC power source；Multiply calculation portion, the output signal of the output signal of the polarity judging part and the current detecting part is multiplied into calculation, output is rectified into the signal of positive or negative polarity；And control unit drives the first switching element and second switch element according to the signal being rectified.
Description
Technical field
The present invention relates to the power inverters for including totem pole type (totem pole) power rate improvement circuit.
Background technique
Power inverter be the alternating voltage obtained from AC power source is converted to the different DC voltage of voltage, and to
The device that load supplies electric power.In general, the semiconductor element as diode, bidirectional triode thyristor when being supplied electric power from AC power source
In the case that part controls, as become non-linear load if from AC power source and being wrapped from the alternating current that AC power source supplies
Include the electric current flowing of higher hamonic wave.The angle of flow of alternating current including the higher hamonic wave narrows and power rate deteriorates, and becomes invalid
The reason of electric power increases.Therefore, by setting alternating voltage as the sinuous AC current waveform of same-phase, to be connected
Angle expands and power rate optimizes, and has the effect for inhibiting higher harmonic component.It is sinuous circuit quilt by the AC current control
Referred to as power rate improves circuit.
As the composition for realizing power rate improvement circuit, there are booster type power rate shown in Fig. 9 improvement circuit, as shown in Figure 10
Totem pole type power rate improve circuit etc..
Booster type power rate shown in Fig. 9 improves circuit and constitutes alternating voltage in this four diodes by D1, D2, D3, D4
Diode bridge be converted to positive polarity rectify pulsating volage, based on pulsating volage make switch element S1 be connected, flow base
In the electric current of pulsating volage.
When the switch element S1 that the solid line and dotted line of Fig. 9 shows the half period that AC power source Vac is positive is connected, is non-conduction
Current path.AC power source Vac is timing, passes through AC power source Vac → diode D2 → inductor L1 → switch when S1 is connected
Element S1 → detection resistance Rs → diode D3 → AC power source Vac path streaming current.Here, applying electricity to inductor L1
Pressure, the electric current for flowing through inductor L1 increase, and put aside energy.Then, if (opening く) switch element S1 is connected, in switch element
During S1 is on, in order to discharge the energy of inductor L1 savings, pass through AC power source Vac → diode D2 → inductor
L1 → diode D5 → capacitor C1 → detection resistance Rs → diode D3 → AC power source Vac path streaming current.
By above movement, the energy put aside in inductor L1 is released in outlet side, according to opening for switch element S1
The turn-on time of pass carries out boost action, while putting aside charge to capacitor C1, makes alternating current close to sinusoidal wave shape.
The booster type power rate improves circuit using the negative side of capacitor C1 as the reference potential of circuit, reference potential and two poles
Detection is connected between pipe D3 improves the resistance Rs of the electric current flowed in circuit in power rate.Then, by with switch element S1
Conduction/non-conduction electric current, based on detection resistance Rs generate voltage, control ac flow.At this point, detection resistance Rs flows
Dynamic electric current becomes negative polarity full-wave rectified voltage due to flowing to diode D3 from reference potential.
As the other structures for realizing power rate improvement circuit, there are totem pole type power rates shown in Fig. 10 to improve circuit.This
Outside, Figure 10 show the switch element S1 of positive half period conducting, it is non-conduction when current path.Totem pole type power rate improves electricity
Two in four diodes of above-mentioned booster type power rate improvement circuit are replaced into switch element S1 and switch element S2 by road, will
Inductor (inductor) L1 for being configured at the output section of diode bridge DB is configured to be series at AC power source Vac and switch member
Between part S1, S2 tie point.
Improve in circuit in the totem pole type power rate, is flowed in detection circuit in the same manner as above-mentioned booster type power rate improvement circuit
Dynamic electric current, according to conducting, the non-conduction period of polarity of voltage the control switch element S1 or switch element S2 of AC power source.Tool
For body, the voltage of AC power source makes switch element S1 conducting, non-conduction movement in the positive half period, makes out in the negative half period
Close element S2 conducting, non-conduction movement.
AC power source Vac is timing, if turn-on switch component S1, is opened by AC power source Vac → inductor L1 →
Close element S1 → diode D1 → AC power source Vac path streaming current.Here, applying voltage to inductor L1, sense is flowed through
It answers the electric current of device L1 to increase, puts aside energy.
Then, switch element S1 is connected, then by AC power source Vac → inductor L1 → switch element S2 (via parasitism
Diode) → capacitor C1 → diode D1 → AC power source Vac path streaming current.Here, savings is in inductor L1's
Energy is discharged in outlet side, carries out boost action according to the turn-on time of the switch of switch element S1, accumulates electricity to capacitor C1
Lotus, while making alternating current close to sinusoidal wave shape.
In this way, booster type power rate improves circuit, totem pole type power rate improves circuit all with same principle, but also has
Difference.Improve in circuit in booster type power rate, with the continuous electric current flowed in a resistance detecting circuit, is believed based on voltage
Number control ac flow.
On the other hand, totem pole type power rate improves in circuit, also needs to study for continuously detecting electric current.For example,
In the case where resistance Rs is arranged between switch element S1 and reference potential, due in resistance Rs during switch element S1 conducting
Streaming current, therefore the product of the magnitude of current and resistance value generates voltage.But switch element S1 non-conduction period resistance Rs not
Streaming current.Therefore, it is impossible to carry out the detection electric current using resistance Rs.
Similarly, it is arranged between the source terminal of switch element S2 and the tie point of inductor L1 and switch element S1
Resistance Rt, detection flow through the electric current of switch element S2, then only retain the detection of the electric current flowed during switch element S2 has been connected.
In addition, the voltage reference that resistance Rs and resistance Rt is generated is different.
In the prior art, be related to totem pole type power rate improve circuit control in describe can by resistance detection electricity
The circuit of stream is constituted.Figure 11 and Figure 12 shows above-mentioned DC converter circuit figure.
As connecting concatenated two switch elements 13,16 and be series at the current detecting of two switch elements 13,16
The structure of the energy circuit made of resistance 14,17.Then, as shown in figure 12, it is configured to place to go here and there two switch elements 13,16
Other than the current detecting resistance 14,17 for joining connection, there are also the control circuit 15 and 18 that two circuits are arranged, the control circuits
15 and 18 are configured to R-S trigger 31, reset signal forms circuit 32, setting signal generator 33, triangular wave oscillator 35
Deng.
But the base of the reference potential of the switch element 16 of control circuit 15,18 in the prior art and switch element 13
Quasi- current potential is different.Therefore, it is necessary to which current detecting resistance 14, the R-S trigger 31, reset signal for constituting control circuit 15 is arranged
It forms the reference potential of circuit 32, setting signal generator 33 and triangular wave oscillator 35 etc. and constitutes control circuit 18
Current detecting resistance 17, R-S trigger 31, reset signal form the benchmark electricity of circuit 32, setting signal generator 33 etc.
The two reference potentials of position.Therefore, have the shortcomings that circuit is caused to constitute complexity.In addition, two control circuits must be by discrete
Element is constituted, the shortcomings that becoming larger there are circuit scale.
Summary of the invention
To solve the above-mentioned problems, its purpose is to provide can use a reference potential control switch element by the present invention
Power inverter.
The power inverter of embodiments of the present invention includes: first switching element and second switch element, and described
Two switch elements are connected via the first tie point with the first switching element；First rectifier cell and the second rectifier cell, institute
It states the second rectifier cell and connects via the second tie point with first rectifier cell；Capacitor, with first rectifier cell
And second rectifier cell be arranged in parallel；Output voltage test section is arranged in parallel with the capacitor；AC power source, described
Between first tie point and second tie point, connect with current detecting part and inductor；Polarity judging part judges the friendship
The polarity in galvanic electricity source；Multiply calculation portion, the output signal of the output signal of the polarity judging part and the current detecting part multiplied into calculation,
Output is rectified into the signal of positive or negative polarity；And control unit drives the first switch member according to the signal being rectified
Part and second switch element.
Invention effect
Power inverter according to the present invention improves the same current detecting letter of circuit with booster type power rate by generating
Number, to improve circuit control circuit since booster type power rate can be diverted, it is possible to generate the with reference potential
The driving signal of one switch element and second switch element, and simple and small-sized control circuit may be implemented.
Detailed description of the invention
Fig. 1, which shows totem pole type (totem pole) power rate, improves the overall structure of circuit.
Fig. 2 shows the detailed constructions of polarity judging part.
Fig. 3 shows the detailed construction of current detecting part.
Fig. 4 shows the detailed construction for multiplying calculation portion.
Fig. 5 shows the structure of control unit.
Fig. 6 shows the structure of control unit when implementing time rectification.
Fig. 7 shows the structure of output voltage test section.
Fig. 8, which shows totem pole type power rate, improves the action of each part waveform of circuit.
Fig. 9, which shows booster type power rate, improves the circuit structure and operating principle of circuit.
Figure 10, which shows totem pole type power rate, improves the circuit structure and operating principle of circuit.
Figure 11 shows the structure that the above-mentioned totem pole type power rate of the prior art improves the control circuit of circuit.
Figure 12 shows the detailed construction that the above-mentioned totem pole type power rate of the prior art improves the control circuit of circuit.
Specific embodiment
(overall description)
It is described with reference to embodiments of the present invention.
Fig. 1 shows the outline structure of power inverter.Power inverter of the invention connects via the first tie point 16
It connects by MOSFET (Metal-Oxide Semiconductor field effect transistor) first switching element 8 constituted and second switch element
9.In addition, connecting the first rectifier cell 10 and the second rectifier cell 11 being made of diode via the second tie point 17.This
Outside, have relative to above-mentioned first rectifier cell 10 and the series connection of the second rectifier cell 11 and capacitor 13 and the output of parallel connection
Voltage detection department 12.
Here, between above-mentioned first tie point 16 and the second tie point 17 by AC power source 0, current detecting part 3 and
Inductor 7 connects and constitutes energy circuit.
The totem pole type power rate improves the control circuit of circuit by judging the polar polarity judging part of above-mentioned AC power source 0
4, multiply calculation portion 5 and control unit 6 is constituted.
Here, above-mentioned polarity judging part 4 is the polar module for judging above-mentioned AC power source 0, and with above-mentioned AC power source 0
Two terminals 1 and 2 connection.Two signal wires connection of above-mentioned polarity judging part 4 is above-mentioned to multiply calculation portion 5 and above-mentioned control unit 6.
Here, the above-mentioned calculation portion 5 that multiplies also is connected to above-mentioned current detecting part 3.In addition, above-mentioned control unit 6 is connected to and sentences from above-mentioned polarity
Two signal wires in disconnected portion 4 and a signal wire for coming involution calculation portion 5.Then, outlet side is connected to above-mentioned first switch member
Part 8 and second switch element 9.
(about polarity judging part 4)
The polarity of AC power source 0 is judged signal and the insulated generation of AC power source 1 by above-mentioned polarity judging part 4, and is exported
First polarity judges that output signal 4a and the second polarity judge output signal 4b.First output signal of above-mentioned polarity judging part 4
4a and the second output signal 4b, which is output to, above-mentioned multiplies calculation portion 5 and above-mentioned control unit 6.Fig. 2 shows the detailed of polarity judging part
Circuit.
Between input terminal 1,2, detect AC power source 0 polarity and connect the first Check up polarity with photoelectrical coupler 18 with
And the second Check up polarity photoelectrical coupler 19, judge the polarity of AC power source 0.
When the half period that AC power source 0 is positive, pass through 1 → current limitation resistor of input terminal, 20 → the first photoelectrical coupler
18 illumination region 18a → input terminal 2 path streaming current.At this point, according to the illumination region 18a's of the first photoelectrical coupler 18
Shine output, the acceptance part 18b conducting of the first photoelectrical coupler, the voltage and current limiting resistance 22 corresponding to DC power supply 25
The electric current of resistance value flow through the first divider resistance 23, generate the electricity for corresponding to the resistance value of electric current and the first divider resistance 23
Pressure.The voltage of the generation is set as H level, the first polarity judges that output signal 4a exports H level.It is shown at (b) of Fig. 8
State the waveform that the first polarity judges output signal 4a.
When the half period being negative due to AC power source 0, the illumination region 18a in the first photoelectric coupling portion 18 becomes back voltage, institute
Become non-conduction with the acceptance part 18b of non-luminous photoelectrical coupler 18, the first polarity judges that output signal 4a exports L level.
Current path at this time is with 2 → the second photoelectrical coupler of input terminal, 19 illumination region 19a → 21 → input terminal of current limitation resistor
The path streaming current of son 1.At this point, according to the luminous output of the illumination region 19a of the second photoelectrical coupler 19, the first photoelectric coupling
The acceptance part 19b of device is connected, and according to the resistance value of DC power supply 25 and current limitation resistor 22, electric current flows through the second divider resistance
24, voltage is generated according to the resistance value of electric current and the second divider resistance 24.Generated voltage is equally used as above-mentioned H level, on
It states the second polarity and judges that output signal 4b exports H level.Above-mentioned second polarity is shown at (c) of Fig. 8 and judges output signal 4b's
Waveform.
Here, in order to which the instantaneous value for determining AC power source 0 is positive or negative, the first polarity judgement output of polarity judging part 4
Signal 4a and the second polarity judge that output signal 4b will not export H level simultaneously.
(about current detecting part)
Above-mentioned current detecting part 3 and the insulated detection of current signal for flowing through above-mentioned inductor 7.Such as using shown in Fig. 3
Current transformer 47.The path that circuital current flows is considered as one turn of a coiling, sets hundreds of for the secondary coiling of insulation
~thousands of turns, with the winding number of 1/ 2 coilings in secondary coiling effluent streaming current.The electric current flows through detection resistance 26 to obtain
With the voltage signal for the current in phase position for flowing through inductor 7.Due to the voltage signal and above-mentioned 7 same-phase of inductor, on
When stating the half period that AC power source 0 is positive, positive voltage signal is obtained from reference potential, from benchmark electricity when the negative half period
Position observation obtains negative voltage.The waveform of the output signal 27 of above-mentioned current detecting part 3 is shown in Fig. 8 (h).
(about calculation portion is multiplied)
The first polarity of the output signal 27 of above-mentioned current detecting part 3 and above-mentioned polarity judging part 4 is sentenced in the above-mentioned calculation portion 5 that multiplies
Disconnected portion's output signal 4a and the second polarity judging part output signal 4b multiplies calculation.Fig. 4 shows the skeleton diagram for multiplying calculation portion 5.Multiply the tool of calculation portion 5
Standby operational amplifier 29,30 and multiply and calculate multiplying for calculation and calculate circuit 33, by the output signal of above-mentioned operational amplifier 29,30
31,32 multiply signal obtained by calculation as the above-mentioned output signal 28 for multiplying calculation portion 5 as the above-mentioned calculation circuit 33 that multiplies.
It is described for when the half period that above-mentioned AC power source 0 is positive.When the half period that above-mentioned AC power source 0 is positive, to
Above-mentioned first polarity that operational amplifier 29 inputs judges that output signal 4a exports H level, and 4b exports L level.These above-mentioned
One polarity judges that output signal 4a and the second polarity judge that output signal 4b is respectively inputted to above-mentioned operational amplifier 29
Inversing input terminal 29 (-) and non-inverting input terminal 29 (+).Since above-mentioned first polarity judges that output signal 4a becomes reversion
Output, so becoming the output signal 31 for being converted to negative voltage from reference potential.For example, if above-mentioned first polarity judges
Output signal 4a is 1V output, then is converted into -1V.Due to above-mentioned second polarity judge output signal 4b for L level, no
Variation.
The output signal 27 of above-mentioned electric current detecting element 3 of above-mentioned operational amplifier 30 is input to due to being input to above-mentioned operation
The non-inverting input terminal 30 (+) of amplifier 30, so the output signal 32 of above-mentioned operational amplifier 30 becomes and above-mentioned electric current
The same signal of the output signal 27 of detecting element 3.The output signal 31 and above-mentioned operational amplifier 30 of above-mentioned operational amplifier 29
Output signal 32 by it is above-mentioned multiply calculate circuit 33 multiply calculation processing, the above-mentioned output signal 28 for multiplying calculation portion 5 exports above-mentioned
Signal after the polarity reversion of current detection signal 27.Action waveforms at this time are shown in the range (i) of period A shown in Fig. 8.
On the other hand, when the half period that above-mentioned AC power source 0 is negative, it is input to above-mentioned the first of above-mentioned operational amplifier 29
Polarity judges that output signal 4a exports L level, and above-mentioned second polarity judges that output signal 4b exports H level.These first polarity
Judge that output signal 4a and the second polarity judge that output signal 4b is input into the above-mentioned above-mentioned operation for multiplying and having inside calculation portion 5
The inversing input terminal 29 (-) and non-inverting input terminal 29 (+) of amplifier 29.Above-mentioned first polarity judges that output signal 4a is
L level does not change.Above-mentioned second polarity judges that output signal 4b is input into non-inverting input terminal 29 (+), and above-mentioned operation is put
The output signal 31 of big device 29 also becomes the signal that output signal 4b same polarity is judged with above-mentioned second polarity.
Be input to the output signal 27 of the above-mentioned above-mentioned electric current detecting element 3 for multiplying the operational amplifier 30 that calculation portion 5 has due to
It is input into the non-inverting input terminal 30 (+) of above-mentioned operational amplifier 30, so the output signal of above-mentioned operational amplifier 30
32 become the signal same with the output signal 27 of above-mentioned electric current detecting element 3.31 He of output signal of above-mentioned operational amplifier 29
The output signal 32 of above-mentioned operational amplifier 30 multiply calculation processing by the above-mentioned calculation circuit 33 that multiplies, above-mentioned to multiply the defeated of calculation portion 5
Signal 28 exports the same signal of output signal 27 of above-mentioned current detecting part 3 out.B during action waveforms at this time are Fig. 8
Range (i) shown in.
(about control unit)
Above-mentioned control unit 6 is configured to that power rate improvement control unit 35 and selector portion 37 is arranged.Fig. 5 shows above-mentioned control unit
Skeleton diagram.Above-mentioned power rate improves control unit 35 and has the control logic used when control booster type power rate improvement circuit, such as
Being able to use the booster type power rate sold in the market improves circuit control IC (integrated circuit) etc..
Improve control unit 35 to above-mentioned power rate and inputs the above-mentioned output signal 28 for multiplying calculation portion 5 and above-mentioned output voltage test section
Output signal 34, export single driving signal 36.Showing at (d) of Fig. 8 from above-mentioned power rate improves what control unit 35 exported
Driving signal 36.
(e), (f) of middle Fig. 8 shows the output signal 38 and 39 of above-mentioned selector 37.
Above-mentioned first polarity, which is inputted, to above-mentioned selector 37 judges that output signal 4a and the second polarity judge output signal
4b and improve the driving signal 36 that control unit 35 exports from above-mentioned power rate, and exports as above-mentioned first switching element 8 and the
The driving signal 38 and 39 of the driving signal distribution of two switch elements 9.
(about output voltage test section)
Above-mentioned output voltage test section 12 has concatenated third partial pressure between the terminal of terminal 40 and 44 shown in Fig. 7
Resistance 41 and the 4th divider resistance 43, the electricity that will be generated in the tie point 42 of third divider resistance 41 and the 4th divider resistance 43
The output signal 34 as above-mentioned output voltage test section is pressed to export.
Terminal 40 shown in Fig. 7 improves the same current potential of output terminal 14 of circuit, terminal with totem pole type power rate shown in FIG. 1
44 with the same current potential of output terminal 15 shown in FIG. 1.That is, totem pole type power rate is improved the output voltage of circuit with above-mentioned third point
The resistance ratios of piezoresistance 41 and the 4th divider resistance 43 partial pressure, output signal 34, which is connected to above-mentioned power rate, improves control unit
35.Wherein, it includes the control logic that totem pole type power rate improves circuit that power rate, which improves control unit,.
(movement that input voltage is timing)
Referring to action waveforms shown in Fig. 8, the electric power that the totem pole type power rate that narration has above-mentioned composition improves circuit turns
The movement of changing device.
Fig. 8 shows the alternating voltage waveform (a) of above-mentioned AC power source 0, above-mentioned first polarity judges signal output waveform
4a (b), above-mentioned second polarity judge signal output waveform 4b (c), open for driving above-mentioned power rate to improve the single of control unit 35
Close the waveform (d) of the driving signal 36 of element, the waveform (e) of the output signal 38 in above-mentioned selector portion 37, above-mentioned selector portion
The current waveform (g) that waveform (f), the above-mentioned inductor 7 of 37 output signal 39 flow, the output letter of above-mentioned current detecting part 3
Numbers 27 waveform (h), the waveform (i) of the above-mentioned output signal 28 for being rectified into positive or negative polarity for multiplying calculation portion 5, from above-mentioned exchange
The AC current waveform (j) that power supply 0 supplies.
Here, when illustrating the half period that AC power source 0 is positive, i.e. during Fig. 8 when A, above-mentioned first polarity judgement output
Signal 4a exports the case where H level.
When above-mentioned first polarity judges output signal 4a for H level, the second polarity judges that output signal 4b becomes L level.
Above-mentioned power rate improves the driving signal 36 of control unit 35 and above-mentioned polarity judges output signal 4a by being input to above-mentioned selector
Portion 37, the output signal 39 in above-mentioned selector portion 37 are assigned to above-mentioned first switching element 8, the driving signal output of H/L level
To above-mentioned first switching element 8.On the other hand, since the output signal 38 in above-mentioned selector portion 37 remains L level, so the
Two switch elements 9 continue to L level.
Based on the driving signal, above-mentioned second switch element 9 repeats conduction/non-conduction movement, accompanies this action above-mentioned sense
Device 7 is answered to repeat savings/electric discharge of energy.During the A of Fig. 8 shown in (g), in above-mentioned 7 streaming current of capacitor.Above-mentioned electric current inspection
Coiling in survey portion 3 and inductor 7 flow same electric current, and detection resistance 26 shown in Fig. 3 generates voltage, such as the A of Fig. 8
Shown in period (h), the output signal 27 of above-mentioned current detecting part 3 is obtained.The output signal 27 of above-mentioned current detecting part 3 is input to
It is above-mentioned to multiply calculation portion 5, it will enter into above-mentioned polarity and judge the output signal 31 of above-mentioned operational amplifier 29 of output signal 4a and upper
The output signal 27 for stating current detecting part 3 multiplies calculation, and what polarity shown in (i) was reversed to negative polarity during obtaining the A such as Fig. 8 multiplies calculation
The output signal 28 in portion 5.
By polarity be reversed to negative polarity the above-mentioned output signal 28 for multiplying calculation portion 5 and above-mentioned output voltage test section 12
Output signal 34, controlling above-mentioned power rate improves the H level time of driving signal 36 of control unit 35.
When the alternating current of above-mentioned AC power source 0 forces down, since the supply amount to above-mentioned capacitor 13 savings charge is few, so
The H level time that above-mentioned power rate improves the single driving signal 36 of control unit 35 increases, and controls the energy put aside to above-mentioned inductor 7
The amount savings time increases.
When the alternating voltage of above-mentioned AC power source 0 is high, increase to the supply amount of above-mentioned capacitor 13 savings charge.Therefore,
Control, which is shortened to the energy of above-mentioned inductor 7, puts aside the time.Therefore, above-mentioned power rate improves the H of the driving signal 36 of control unit 35
Level time shortens.In this way, controlling the conduction/non-conduction of above-mentioned first switching element 8 with the alternating voltage of above-mentioned AC power source 0
Time, thus the waveform shown in (g) during the electric current of above-mentioned inductor 7 flowing becomes the A of Fig. 8, the friendship with the positive half period
Galvanic electricity pressure is same-phase.
(movement when input voltage is negative)
On the other hand, when illustrating the half period that AC power source 0 is negative, i.e. during Fig. 8 when B, above-mentioned second polarity judgement
Output signal 4b exports the case where H level.
When above-mentioned second polarity judges output signal 4b for H level, above-mentioned first polarity judges that signal 4a becomes L level
Output.Above-mentioned power rate improves the single driving signal 36 of control unit 35 and above-mentioned second polarity judges that output signal 4b is entered
To above-mentioned selector portion 37, so that the output signal 39 in above-mentioned selector portion 37 is assigned to above-mentioned second switch element 9, H/L electricity
Flat driving signal is output to above-mentioned first switching element.Based on the driving signal, the above-mentioned repetition of second switch element 9 conducting/
Non-conduction movement accompanies this action savings/electric discharge that above-mentioned inductor 7 repeats energy.In the flowing of above-mentioned inductor 7 such as Fig. 8
Electric current shown in period B (g).
Coiling of above-mentioned current detecting part 3 and inductor 7 similarly streaming current, detection resistance shown in Fig. 3
26 generate voltage, the output signal 27 of above-mentioned current detecting part 3 shown in (h) during obtaining the B such as Fig. 8.Above-mentioned current detecting 3
Output signal 27 be input into it is above-mentioned multiply calculation portion 5, above-mentioned polarity is judged into the defeated of output signal 4b and above-mentioned current detecting part 3
Signal 27 multiplies calculation out, the above-mentioned output signal 28 for multiplying calculation portion 5 of negative polarity shown in (i) during obtaining the B such as Fig. 8.
Pass through the output signal 34 of the above-mentioned output signal 28 for multiplying calculation portion 5 and above-mentioned output voltage test section 12 of negative polarity
Controlling above-mentioned power rate improves the H level time of single driving signal 36 of control unit 35.
As hereinbefore, when the alternating current of above-mentioned AC power source 0 forces down, due to the confession to above-mentioned capacitor 13 savings charge
Few to amount, so the H level time that above-mentioned power rate improves the single driving signal 36 of control unit 35 increases, control increases to above-mentioned
The energy of inductor 7 puts aside the time.
When the alternating voltage of above-mentioned AC power source 0 is high, increase to the supply amount of above-mentioned capacitor 13 savings charge.Therefore,
Control, which is shortened to the energy of above-mentioned inductor 7, puts aside the time.Therefore, above-mentioned power rate improves the single driving signal of control unit 35
36 H level time shortens.In this way, being led with the conducting of the alternating voltage of above-mentioned AC power source 0 control second switch element 9/non-
The logical time, thus the waveform shown in (g) during the electric current of above-mentioned inductor 7 flowing becomes the B of Fig. 8, with the negative half period
Alternating voltage is same-phase.
(about time rectification)
The embodiment that above-mentioned totem pole type power rate improves circuit describes above-mentioned first switching element 8 and second switch
Element 9 judges the polarity of the alternating voltage of above-mentioned AC power source 0, by alternately control conduction/non-conduction movement, thus in control
The alternating voltage of the electric current and above-mentioned AC power source 0 of stating the flowing of inductor 7 is same-phase.
By above-mentioned movement, for example, above-mentioned AC power source 0 be positive half period when, above-mentioned first switching element 8 is led
Logical/non-conduction movement, above-mentioned second switch element 9 become above-mentioned first switching element 8 and release above-mentioned induction in non-conduction period
The path when energy that device 7 is put aside.At this point, if above-mentioned first switching element 8 is defined as main switch element, by above-mentioned second
Switch element 9 is defined as auxiliary switch element, then first via auxiliary switch is built in when the energy put aside above-mentioned inductor 7 is released
The body diode of part puts aside charge to above-mentioned capacitor 13.At this point, the power loss in auxiliary switch element is in auxiliary switch element
The product of the electric current of flowing and the clockwise direction voltage for the body diode for being built in auxiliary switch element.
In contrast, when main switch element is switched to non-conduction, make auxiliary switch element conductive.It is produced when auxiliary switch element conductive
Raw resistance components and the flowing of auxiliary switch element electric current square product situation compared to auxiliary switch element two pole of body
The product of pipe and the electric current of flowing, can reduce loss, have the effect of reducing loss.The movement is known as time rectification, due to this
Invention is configured to that the driving for driving above-mentioned first switching element 8 and second switch element 9 can be generated with a reference potential
Signal, so the composition for changing above-mentioned control unit 6 shown in fig. 5 can be with time rectification.Describe its details.
The difference of explanatory diagram 5 and Fig. 6.(for diode rectification referring to Fig. 5, additional time rectification is Fig. 6)
Control unit 6 shown in Fig. 6 is the composition for realizing above-mentioned time rectification, is above-mentioned control unit shown in fig. 56
Above-mentioned power rate improves the structure that time rectification signal generation portion 45 is connected between control unit 35 and above-mentioned selector portion 37.It is above-mentioned same
The output signal 46 of phase rectified signal generating unit inverts the single switch element of the above-mentioned power rate improvement control unit 35 of output driving
Driving signal 36.
The output signal 46 of above-mentioned time rectification signal generation portion 45, above-mentioned power rate are improved to the single drive of control unit 35
Dynamic signal 36, above-mentioned polarity judge that output signal 4a, above-mentioned polarity judge that output signal 4b is input to above-mentioned selector portion 37.On
When stating polarity and judging output signal 4a for H level, the output of output signal 38 in above-mentioned selector portion 37 improves with above-mentioned power rate to be controlled
The driving signal of 36 same-phase of single driving signal in portion 35 processed defines above-mentioned first switching element 8 and is used as main switch element, on
Stating second switch element 9 is auxiliary switch element.During above-mentioned first switching element 8 is main switch element conducting, above-mentioned second is opened
Closing element 9 is auxiliary switch element non-conductive.On the other hand, above-mentioned first switching element 8 i.e. main switch element is switched to non-conduction
When, above-mentioned second switch element 9 is that auxiliary switch element is switched to conducting.
The half period that above-mentioned AC power source 0 is negative, contrary to the above, above-mentioned second switch element 9 is main switch element, is connect
By the driving signal for single 36 same-phase of driving signal for improving control unit 35 with above-mentioned power rate.Above-mentioned movement interaction carries out,
By can reduce loss via the body diode for being built in switch element.
(effect)
As described above, the totem pole type power rate of present embodiment improves in the power inverter of circuit, insulated detection
Current signal, due to that the output signal 27 of above-mentioned current detecting part 3 can be rectified into positive or negative polarity as needed, so energy
Enough booster type power rates of directly diverting improve circuit control IC, can realize that totem pole type power rate improves electricity by simple structure
The control circuit of the power inverter on road.In addition, driving first switching element and second switch element in present embodiment
When, due to can be with time rectification, so having the advantages that can reduce the loss based on switch element.
Claims (9)
1. a kind of power inverter characterized by comprising
First switching element and second switch element, the second switch element is via the first tie point and first switch member
Part series connection；
First rectifier cell and the second rectifier cell, second rectifier cell is via the second tie point and the first rectification member
Part series connection；
Capacitor is arranged in parallel with first rectifier cell and the second rectifier cell；
Output voltage test section is arranged in parallel with the capacitor；
AC power source is connected between first tie point and second tie point with current detecting part and inductor；
Polarity judging part judges the polarity of the AC power source, and exports the first polarity and judge that output signal and the second polarity are sentenced
Disconnected output signal；
Multiply calculation portion, the output signal of the output signal of the polarity judging part and the current detecting part is multiplied into calculation, output rectification
For the signal of positive or negative polarity, and have the first operational amplifier and second operational amplifier；And
Control unit drives the first switching element and second switch element according to the signal being rectified,
Multiply in calculation portion described, first polarity is judged that output signal and second polarity judge that output signal difference is defeated
Enter the inversing input terminal and non-inverting input terminal of first operational amplifier, the output signal of the current detecting part is defeated
Enter the non-inverting input terminal to the second operational amplifier so that the output signal of the second operational amplifier become with
The same signal of the output signal of the current detecting part, and by first operational amplifier and the second operational amplifier
Output be multiplied.
2. power inverter according to claim 1, which is characterized in that
The control unit includes:
Power rate improves control unit, improves the control logic of circuit including booster type power rate, and the power rate improves control unit according to institute
The output voltage for stating the output signal, the output voltage test section that multiply calculation portion, exports the driving signal of single switch element；
And
Selector portion, according to the output signal of the polarity judging part, using the power rate improve the output signal of control unit as
The first switching element or the driving signal of second switch element are allocated.
3. power inverter according to claim 2, which is characterized in that
The control unit includes time rectification signal generation portion, and the time rectification signal generation portion reversion exports the power rate and changes
The output signal of kind control unit.
4. power inverter according to claim 3, which is characterized in that
The selector portion inputs the output signal of the polarity judging part, the power rate improves the output signal of control unit, institute
The output signal of time rectification signal generation portion is stated, and according to the output signal of the polarity judging part, the power rate is improved
The output signal of control unit, the output signal of the time rectification signal generation portion are as first switching element or second switch member
The driving signal of part is allocated.
5. power inverter according to claim 2, which is characterized in that
The control logic that the booster type power rate improves circuit is that booster type power rate improves circuit control integrated circuit.
6. power inverter according to claim 1, which is characterized in that
The polarity judging part is connect with two terminals of the AC power source, two signal wires connection of the polarity judging part
Described to multiply calculation portion and the control unit, the calculation portion that multiplies is connected to the current detecting part, and the control unit is connected to from institute
It states two signal wires of polarity judging part and from a signal wire for multiplying calculation portion, outlet side is connected to described first and opens
Close element and the second switch element.
7. power inverter according to claim 1, which is characterized in that
The output voltage test section is included in concatenated third divider resistance and the 4th divider resistance between terminal, will be described
Output of the voltage that the tie point of third divider resistance and the 4th divider resistance generates as the output voltage test section
Signal output.
8. power inverter according to claim 2, which is characterized in that
The output voltage test section is included in concatenated third divider resistance and the 4th divider resistance between terminal, will be described
Output of the voltage that the tie point of third divider resistance and the 4th divider resistance generates as the output voltage test section
Signal output.
9. power inverter according to claim 7, which is characterized in that
The control unit includes that power rate improves control unit, and it includes that totem pole type power rate improves circuit that the power rate, which improves control unit,
Control logic,
The totem pole type power rate improves the output voltage of circuit with the third divider resistance and the 4th divider resistance
Resistance ratios partial pressure, the output signal of the output voltage test section, which is connected to the power rate, improves control unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510844089.4A CN106803722B (en) | 2015-11-26 | 2015-11-26 | Power inverter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510844089.4A CN106803722B (en) | 2015-11-26 | 2015-11-26 | Power inverter |
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| Publication Number | Publication Date |
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| CN106803722A CN106803722A (en) | 2017-06-06 |
| CN106803722B true CN106803722B (en) | 2019-02-19 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3829087B2 (en) * | 2001-11-20 | 2006-10-04 | 三菱電機株式会社 | Power factor correction equipment |
| JP2007074799A (en) * | 2005-09-06 | 2007-03-22 | Fuji Electric Holdings Co Ltd | Controller of rectifying circuit |
| CN101584107A (en) * | 2007-01-24 | 2009-11-18 | 松下电器产业株式会社 | DC power supply device and air conditioner using the same |
| CN101682267A (en) * | 2007-06-04 | 2010-03-24 | 松下电器产业株式会社 | Electric power source control device and heat pump device using the electric power source control device |
| CN102843025A (en) * | 2012-08-06 | 2012-12-26 | 台达电子工业股份有限公司 | Control circuit, control method, and power supply system for power factor correction (PFC) circuit |
-
2015
- 2015-11-26 CN CN201510844089.4A patent/CN106803722B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3829087B2 (en) * | 2001-11-20 | 2006-10-04 | 三菱電機株式会社 | Power factor correction equipment |
| JP2007074799A (en) * | 2005-09-06 | 2007-03-22 | Fuji Electric Holdings Co Ltd | Controller of rectifying circuit |
| CN101584107A (en) * | 2007-01-24 | 2009-11-18 | 松下电器产业株式会社 | DC power supply device and air conditioner using the same |
| CN101682267A (en) * | 2007-06-04 | 2010-03-24 | 松下电器产业株式会社 | Electric power source control device and heat pump device using the electric power source control device |
| CN102843025A (en) * | 2012-08-06 | 2012-12-26 | 台达电子工业股份有限公司 | Control circuit, control method, and power supply system for power factor correction (PFC) circuit |
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| CN106803722A (en) | 2017-06-06 |
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