CN207743895U - A kind of two-stage type single-phase inverter - Google Patents
A kind of two-stage type single-phase inverter Download PDFInfo
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Abstract
The utility model discloses a kind of two-stage type single-phase inverters, including direct-current input power supplying, the DC DC booster circuit that can switch between SPWM HF switches state and bypass state, the single-phase multi-level inverter circuit that can switch between power frequency commutation state and SPWM HF switch states and control circuit, the input of DC DC booster circuit terminates direct-current input power supplying, the input terminal of output end order phase multi-level inverter circuit.The compound composition sinewave output of two-stage type single-phase inverter prime DC boosting and rear class inverter circuit of the utility model, the front stage of two-stage type framework works in partial power modes, and smaller dc-link capacitance and switching power loss reduction can be used, while multi-level inverter circuit leakage current is smaller, switching power loss further decreases, therefore this inverter is at low cost, high conversion efficiency, safety are good, suitable for various grid types, off-network type and accumulation energy type inverter.
Description
Technical field
The utility model is related to inversion transformation technique more particularly to a kind of two-stage type single-phase inverters.
Background technology
Inverter is one of key technology of field of power electronics, and traditional single phase inverter including power as shown in Figure 1, open
Pipe S1, S2, S3 and S4 are closed, direct current input side is connected to filter capacitor Cin, according to the switch motion of device for power switching, output one
The ac square-wave voltage of consecutive, maximum square wave amplitude are limited to DC input voitage.The inverter is with diagonal line S1 and S4, diagonal
Line S2 and S3 constitute two groups of linkage power switch, and two groups of power switch alternatings are open-minded, as a result, exporting positive and negative in exchange side
The square-wave voltage of handover, using L1, L2 and Cout composition ac filter circuit after export sine voltage.Power device
Specific switching sequence selection, according to the difference of control purpose, there are multiple control modes, such as square wave inversion control, sinusoidal wave pulse
Width modulated (SPWM) etc..The technology maturation of inverter is reliable, is widely used in new energy grid-connected power, uninterruptible power supply
(UPS), the occasions such as inverter and motor driving.
It is relatively low in DC input voitage, DC/DC booster converters can be increased in the DC side of inverter and constitute two
Grade formula inversion framework, as shown in Figure 2.DC/DC booster converters generally using Boost to promote DC input voitage,
Therefore the DC input voitage range of two-stage type single-phase inverter is wider, and it is defeated to be especially suitable for direct current for more convenient practical application
Enter the low application scenario of voltage.In new energy parallel network power generation, it is dirty that the DC voltage of photovoltaic array is often subject to plate face dust
Dirty and climatic environment influence and reduce.Meanwhile with accumulator direct current input electronic power inversion equipment, as ups power,
New energy automobile motor driver etc., DC input voitage also can often change.Therefore, photovoltaic DC-to-AC converter, UPS, electricity drive etc. are big
Part all uses two-stage type framework.
In two-stage type single-phase inversion framework, DC input voitage is generally increased to more than exchange output by Boost
More than the peak value of voltage, therefore prime Boost and rear class inverter all work in full power state.I.e. in the friendship of 3kW
Under the conditions of flowing output power, the output rating of rear class inverter is 3kW, while considering efficiency factor, prime Boost
Output power will be in 3kW or more.Under this operating mode, all device for power switching all work in total power quota, because of work(
Rate device is expensive, quantity is more and complicated, while control strategy enforcement difficulty is big, improve circuit and device at
Originally it, reduces system reliability, increase switching power loss.
Invention content
The two-stage type single-phase inversion that the technical problem to be solved by the present invention is to provide a kind of prices is low, switching power loss is small
Device.
In order to solve the above-mentioned technical problem, the technical solution adopted in the utility model is a kind of two-stage type single-phase inverter,
Including direct-current input power supplying, the DC-DC voltage boosting that can switch between SPWM HF switches state and bypass state electricity
Road, the single-phase multi-level inverter circuit that can switch between power frequency commutation state and SPWM HF switch states and control circuit,
The input of direct current-direct current voltage boost circuit terminates direct-current input power supplying, the input terminal of output end order phase multi-level inverter circuit.
Above-described two-stage type single-phase inverter, which is characterized in that control circuit includes controller, input voltage sampling
Circuit, output voltage sampling circuit, the first driving circuit and the second driving circuit, the sampled signal of input voltage sample circuit are defeated
The control of outlet, the control terminal and the second driving circuit of the sampled signal output end of output voltage sampling circuit, the first driving circuit
End processed connects microcontroller respectively；The driving signal output end of first driving circuit connects direct current-direct current voltage boost circuit, the second driving electricity
The driving signal output end order phase multi-level inverter circuit on road.
Above-described two-stage type single-phase inverter, which is characterized in that control circuit include input current sample circuit and
Output current sample circuit, the sampled signal of the sampled signal output end and output current sample circuit of input current sample circuit
Output end connects microcontroller respectively.
Above-described two-stage type single-phase inverter, which is characterized in that direct current-direct current voltage boost circuit includes Boost transformation
Circuit, Boost translation circuits include third inductance, the 7th switching tube, diode and dc-link capacitance, and the first of third inductance
Terminate the anode of direct-current input power supplying, the anode of the hot end and diode of the second the 7th switching tube of termination；The moon of diode
Pole connects the anode of dc-link capacitance, the low potential termination direct-current input power supplying of the cathode of dc-link capacitance and the 7th switching tube
Cathode, the 7th switching tube control termination the first driving circuit driving signal output end.
Above-described two-stage type single-phase inverter, which is characterized in that single-phase multi-level inverter circuit includes the more level of H6
Inverter circuit with exchange output filter circuit, 6 switching tubes of H6 multi-level inverter circuits, switching tube includes body diode；First
The anode of the hot end of switching tube and the high potential termination Boost translation circuit output ends of third switching tube；Second switch pipe
Cold end and the 4th switching tube low potential termination Boost translation circuit output ends cathode；The low electricity of first switch pipe
The hot end of position the 6th switching tube of termination, the hot end of the low potential termination second switch pipe of the 6th switching tube；Third is opened
The low potential for closing pipe terminates the hot end of the 4th switching tube；The low potential of the high potential termination third switching tube of 5th switching tube
End, the hot end of the low potential termination second switch pipe of the 5th switching tube；It includes the first inductance, the to exchange output filter circuit
Two inductance and third capacitance, the first inductance are connected on the cold end and the first of how single-phase multi-level inverter circuit of first switch pipe
Between ac output end, the second inductance is connected on the cold end of third switching tube and single-phase multi-level inverter circuit second exchange it is defeated
Between outlet；Third capacitance is connected between two ac output ends of how single-phase multi-level inverter circuit, H6 multi-level inverse conversion electricity
The control terminal of 6 switching tubes in road connects the corresponding driving signal output end of the second driving circuit respectively.
Above-described two-stage type single-phase inverter, which is characterized in that single-phase multi-level inverter circuit includes HERIC more
Level inverter circuit includes 6 switching tubes with output filter circuit, HERIC multi-level inverter circuits is exchanged, and switching tube includes body
Diode；The anode of the hot end of first switch pipe and the high potential termination Boost translation circuit output ends of third switching tube；
The low potential of the cold end of second switch pipe and the 4th switching tube terminates the cathode of Boost translation circuit output ends；First opens
The hot end of the low potential termination second switch pipe of pipe is closed, the low potential of third switching tube terminates the high potential of the 4th switching tube
End；The cold end of the high potential termination first switch pipe of 5th switching tube, the 6th switch of low potential termination of the 5th switching tube
The cold end of pipe, the high potential of the 6th switching tube terminate the hot end of the 4th switching tube；Exchanging output filter circuit includes
First inductance, the second inductance and third capacitance, the first inductance be connected on first switch pipe cold end and how single-phase more level it is inverse
Become between the first ac output end of circuit, the second inductance is connected on the cold end and single-phase multi-level inverse conversion electricity of third switching tube
Between the second ac output end of road；Third capacitance is connected between two ac output ends of how single-phase multi-level inverter circuit,
The control terminal of 6 switching tubes of HERIC multi-level inverter circuits connects the corresponding driving signal output end of the second driving circuit respectively.
Above-described two-stage type single-phase inverter, which is characterized in that direct current-direct current voltage boost circuit includes n friendship in parallel
Wrong Boost translation circuits.
The compound composition sine wave of two-stage type single-phase inverter prime DC boosting and rear class inverter circuit of the utility model
The front stage of output, two-stage type framework works in partial power modes, and smaller dc-link capacitance and switching power loss can be used
Reduce, while multi-level inverter circuit leakage current is smaller, switching power loss further decreases, therefore this inverter is at low cost, turns
Change that efficient, safety is good, suitable for various grid types, off-network type and accumulation energy type inverter.
Description of the drawings
Utility model will be further described in detail below with reference to the attached drawings and specific embodiments.
Fig. 1 is the schematic diagram of prior art single stage type single-phase inverter.
Fig. 2 is the schematic diagram of prior art two-stage type single-phase inverter.
Fig. 3 is the circuit diagram of the utility model embodiment two-stage type time-sharing multiplex single phase multilevel inverter.
Fig. 4 is the operation principle of the utility model embodiment two-stage type time-sharing multiplex single phase multilevel inverter time-sharing multiplex
Figure.
Fig. 5 is the circuit diagram of 1 two-stage type time-sharing multiplex single phase multilevel inverter of the utility model embodiment.
Fig. 6 be exchanged under 1 two-stage type time-sharing multiplex single phase multilevel inverter Boost patterns of the utility model embodiment it is defeated
Go out the schematic diagram of sine voltage positive half cycle.
Fig. 7 be exchanged under 1 two-stage type time-sharing multiplex single phase multilevel inverter Boost patterns of the utility model embodiment it is defeated
Go out the schematic diagram of sine voltage negative half period.
Schematic diagram under 1 two-stage type time-sharing multiplex single phase multilevel inverter Buck patterns of Fig. 8 the utility model embodiments.
Fig. 9 is the schematic diagram of 2 two-stage type time-sharing multiplex single phase multilevel inverter of the utility model embodiment
Figure 10 is the principle of 3 crisscross parallel two-stage type time-sharing multiplex single phase multilevel inverter of the utility model embodiment
Figure.
Specific implementation mode
Circuit theory such as Fig. 3 to Fig. 8 of 1 two-stage type time-sharing multiplex single phase multilevel inverter of the utility model embodiment
Shown, in two-stage type time-sharing multiplex single phase multilevel inverter and its control strategy schematic diagram shown in Fig. 3, inverter is by preceding
The single-phase multi-level inverter circuit of grade direct current-direct current voltage boost circuit combination rear class is constituted.
Direct-current input power supplying Vin is supplied to direct current-straight after DC filter capacitor C1 filtering, with stable direct current input
Stream booster circuit obtains high voltage on dc-link capacitance C2, then by obtaining high frequency side after single-phase multi-level inverter circuit
Wave, finally by obtaining sinewave output after output inductor L1, L2 and the filtering of capacitance C3 ac high frequencies.
The control circuit of this inverter includes controller, and controller includes time-sharing multiplex logical operation and processing unit,
Time-sharing multiplex logical operation uses microcontroller (MCU) with processing unit, and internal concrete function is realized by embedded software, is driven
Dynamic circuit either controller a part, individual devices can also be set.Input signal is input voltage sampled signal
OP1, output voltage sampled signal OP2 and input are sampled with output current, and control is generated using internal logic operation and after handling
Signal processed, and via the drive signal for generating DC boosting and inverter circuit device for power switching after each driving circuit, thus
Obtain stable sinewave output.Sine wave instantaneous value Vacpk real-time changes are exported by exchange, controller automatically switches direct current
It boosts, the working condition of inverter circuit, to realize the time-sharing multiplex function of inverter, exports sine wave instantaneous value namely exchange
Voltage peak.
As shown in figure 4, the operation principle of two-stage type time-sharing multiplex is divided into Boost patterns and Buck patterns, so-called Boost moulds
Formula, that is, direct current-direct current voltage boost circuit works in high_frequency sine wave pulsewidth modulation (SPWM) state and multi-level inverter circuit works
In power frequency commutation state；Buck patterns, that is, single-phase multi-level inverter circuit works in SPWM states and direct current-direct current voltage boost circuit
Bypass state is worked in, the switching of operating mode is determined by DC input voitage and ac output voltage instantaneous value.Direct current
When input voltage vin is less than ac output voltage instantaneous value Vacpk, direct current-direct current voltage boost circuit works in SPWM, therefore can obtain
To the C2 both end voltage waveforms of diagram, and single-phase multi-level inverter circuit works in power frequency commutation state, only simply C2
Both end voltage is transmitted to exchange outlet side；Otherwise direct current-direct current voltage boost circuit works in bypass mode namely direct-passing mode, and
Single-phase multi-level inverter circuit works in SPWM.Prime DC boosting and rear class inverter circuit is compound constitutes friendship as shown in Figure 4
Stream output sine voltage, the front stage of two-stage type framework work in partial power modes, power device without full power operation,
And smaller dc-link capacitance and switching power loss reduction can be used, while multi-level inverter circuit leakage current is smaller, switching power loss
It further decreases.
In addition, this inverter is used for new energy photovoltaic with wind power-generating grid-connected type in application, at can be by sample circuit
Phase, the frequency of reason network voltage obtain the phase of current reference signal, frequency information, and by other increased maximum power point
Tracking (MPPT) control strategy obtains the amplitude information of current reference signal, so as to be precisely controlled phase, the frequency of grid-connected current
Rate and amplitude, while increasing electric voltage feed forward, Repetitive controller scheduling algorithm, control performance can be further improved.To which controller is realized
The time-sharing multiplex function of inverter, while also realizing electric power detection, communication, the protection etc. of AC and DC side.
The embodiment 1 of two-stage type time-sharing multiplex single phase multilevel inverter is as shown in figure 5, direct current-direct current voltage boost circuit, list
Phase multi-level inverter circuit is made of Boost, H6 multi-level inverter circuits respectively.Inductance L3, power switch tube S 7, work(
Rate diode D8 and dc-link capacitance C2 constitutes Boost, and wherein D7 is the body diode of S7；Power switch tube S 1,
S2, S3, S4, S5, S6 constitute inverter bridge leg, and wherein D1, D2, D3, D4, D5, D6, D7 is respectively S1, S2, S3, S4, S5, S6
Body diode, inductance L1, L2 and capacitance C3 constitute exchange output filter, and inverter bridge leg is collectively formed with output filter is exchanged
Single-phase multi-level inverter circuit, in addition RL be output loading, and AC be parallel network reverse when AC network.
When DC input voitage Vin is less than ac output voltage instantaneous value Vacpk, inverter works in Boost patterns,
I.e. Boost works in SPWM HF switches state, H6 multi-level inverter circuits work in power frequency commutation state.Fig. 6 institutes
It is shown as a kind of power frequency commutation mode, such case corresponds to exchange output sine voltage positive half cycle.At this point, by L3, S7, D8 and directly
The Boost that stream bus capacitor C2 is constituted works in SPWM HF switch states, to be obtained on dc-link capacitance C2
To Sine Modulated waveform.S1 and S4 are constantly on state simultaneously, the energy of Vin and L3 by S1, S4 and by L1, L2,
And C3 gives output loading RLEnergy is provided, and provides energy to AC network AC in parallel network reverse.
Fig. 7 show another power frequency commutation mode, and such case corresponds to exchange output sine voltage negative half period.This
When, the Boost being made of L3, S7, D8 and dc-link capacitance C2 still operates in SPWM HF switch states, from
And Sine Modulated waveform is obtained on dc-link capacitance C2.S2, S3 and S6 are constantly on state, the energy of Vin and L3 simultaneously
Amount gives output loading R by S2, S3, S6 and by L1, L2 and C3LEnergy is provided, and energy is provided in parallel network reverse
Give AC network AC.
Since two groups of inverter bridge leg power switch tubes work in the positive and negative half cycle of sine wave respectively, while exchanging output AC and being
Low-frequency power frequency period, thus referred to as power frequency commutation.It should be noted that inverter works under Boost patterns, inversion
The power switch tube S 5 of bridge arm does not switch work.
As shown in figure 8, when DC input voitage Vin is more than ac output voltage instantaneous value Vacpk, inverter works in
Buck patterns, i.e. Boost work in bypass mode, and H6 multi-level inverter circuits work in SPWM HF switch shapes
State.L3, D8 that direct-current input power supplying Vin passes through in Boost charge to dc-link capacitance C2, to be obtained on C2
To DC voltage identical with Vin.Since under this pattern, D8 is constantly on, therefore referred to as bypass mode or straight-through mould
Formula.At this point, inverter bridge leg works in SPWM HF switch states, and two groups of inverse switch pipes are working in exchange output just respectively
The positive and negative half cycle of string wave.Under sine wave positive half cycle, S1, S4 are SPWM HF switch states, and S5, D6 work in freewheeling state, directly
The energy of stream input power Vin gives output loading R by S1, S4 and by L1, L2 and C3LEnergy is provided, and grid-connected inverse
AC network AC is provided energy to when change.Under sine wave negative half period, S2, S3 and S6 are SPWM HF switch states, D5, S6
Freewheeling state is worked in, the energy of direct-current input power supplying Vin by S2, S3, S6 and passes through L1, L2 and C3 to output loading
RLEnergy is provided, and provides energy to AC network AC in parallel network reverse.It should be noted that inverter works in Buck
Under pattern, the power switch tube S 7 of Boost does not switch work.
In another two-stage type time-sharing multiplex single phase multilevel inverter of embodiment two as shown in Figure 9, direct current-direct current
Booster circuit, single-phase multi-level inverter circuit are made of Boost, HERIC multi-electrical level inverters respectively.Inductance L3, work(
Rate switching tube S7, power diode D8 and dc-link capacitance C2 constitute Boost converters, and wherein D7 is the body diode of S7；
Power switch tube S 1, S2, S3, S4, S5, S6 constitute inverter bridge leg, wherein D1, D2, D3, D4, D5, D6, D7 be respectively S1, S2,
The body diode of S3, S4, S5, S6, and S5, S6, D5, D6 constitute afterflow branch, it is defeated that inductance L1, L2 and capacitance C3 constitute exchange
Go out filter, inverter bridge leg collectively forms single-phase multi-level inverter circuit with output filter is exchanged, in addition RLFor output loading,
And AC be parallel network reverse when AC network.The operation principle of this inverter is similar to embodiment 1 shown in Fig. 8 to Fig. 5,
Explanation is not repeated herein.
In the crisscross parallel two-stage type time-sharing multiplex single phase multilevel inverter schematic diagram of embodiment three as shown in Figure 10, together
Sample, inverter is made of prime Boost combination rear class HERIC multi-electrical level inverters.Compared with Fig. 9, by one
Boost and use n mutually isostructural Boost instead and constitute, be crisscross parallel control between each Boost
System, it is 360 °/n to control the phase being staggered between signal.Interleaving and Transformer Paralleling can reduce input, output current ripple, thus can
Reduce input, the size of output capacitance and capacity.In addition, Interleaving and Transformer Paralleling is for new energy photovoltaic and wind power-generating grid-connected type
Multichannel MPPT functions are realized in application, can be facilitated by this n Boost.The basic functional principle and figure of this inverter
5 is similar to embodiment 1 shown in Fig. 8, and explanation is not repeated herein.
What needs to be explained here is that prime direct current-direct current voltage boost circuit is other than using above-mentioned Boost,
Other kinds of isolation and non-isolation DC/DC converters can be used；Simultaneously the single-phase multi-level inverter circuit of rear class in addition to using on
It states other than H6, HERIC inverter, it is possible to use other kinds of single phase multilevel inverter.From the foregoing it will be appreciated that direct current input electricity
When pressure is less than ac output voltage peak value, direct current-direct current voltage boost circuit works in SPWM HF switch states, and single-phase more level
Inverter circuit works in power frequency commutation state；Otherwise direct current-direct current voltage boost circuit works in bypass mode, and single-phase more level are inverse
Become circuit and works in SPWM HF switches.Exchange output sine wave instantaneous value real-time change, controller can automatically switch direct current liter
Pressure, the working condition of inverter circuit, to realize the time-sharing multiplex function of inverter.Prime DC boosting and rear class inverter circuit
The front stage of compound composition sinewave output, two-stage type framework works in partial power modes, and smaller DC bus can be used
Capacitance and switching power loss reduction, while multi-level inverter circuit leakage current is small, switching power loss further decreases, therefore it is this inverse
Become that device is at low cost, high conversion efficiency, safety are good, can be applied to variable-frequency power sources, uninterruptible power supply (UPS), motor driving and
The occasions such as new energy photovoltaic generation and wind-power electricity generation.
The advantages of the utility model above example and effect：
1, prime DC boosting and the compound composition sinewave output of rear class inverter circuit, the front and back level work of two-stage type framework
In partial power modes, power device need not work in full power state；
2, in the case of same output power, power device cost is lower；
3, in the case of same output power, switching power loss is lower, transfer efficiency higher；
4, in the case of same output power, leakage current is smaller, safety is more preferable；
5, in the case of same output power, dc-link capacitance is smaller, inverter longevity is longer；
6, multiple DC voltage booster circuits can reduce current ripples in Interleaving and Transformer Paralleling, and facilitate realization to generate electricity by way of merging two or more grid systems and answer
Multichannel MPPT functions.
Claims (6)
1. a kind of two-stage type single-phase inverter, which is characterized in that including direct-current input power supplying, can SPWM HF switches state with
The direct current-direct current voltage boost circuit that switches between bypass state, can power frequency commutation state and SPWM HF switches state it
Between the single-phase multi-level inverter circuit that switches and control circuit, the input of direct current-direct current voltage boost circuit terminates direct-current input power supplying,
The input terminal of output end order phase multi-level inverter circuit；Control circuit includes controller, input voltage sample circuit, output electricity
Press sample circuit, the first driving circuit and the second driving circuit, sampled signal output end, the output electricity of input voltage sample circuit
Sampled signal output end, the control terminal of the first driving circuit and the control terminal of the second driving circuit of pressure sample circuit connect micro- respectively
Controller；The driving signal output end of first driving circuit connects direct current-direct current voltage boost circuit, the drive signal of the second driving circuit
Output end order phase multi-level inverter circuit.
2. two-stage type single-phase inverter according to claim 1, which is characterized in that control circuit includes input current sampling
Circuit and output current sample circuit, the sampled signal output end of input current sample circuit and adopting for output current sample circuit
Sample signal output end connects microcontroller respectively.
3. two-stage type single-phase inverter according to claim 1, which is characterized in that direct current-direct current voltage boost circuit includes
Boost translation circuits, Boost translation circuits include third inductance, the 7th switching tube, diode and dc-link capacitance, third
The anode of first termination direct-current input power supplying of inductance, the anode of the hot end and diode of the second the 7th switching tube of termination；
The cathode of diode connects the anode of dc-link capacitance, and the low potential termination of the cathode of dc-link capacitance and the 7th switching tube is straight
Flow the cathode of input power, the driving signal output end of control the first driving circuit of termination of the 7th switching tube.
4. two-stage type single-phase inverter according to claim 3, which is characterized in that single-phase multi-level inverter circuit includes H6
Multi-level inverter circuit with to exchange output filter circuit, 6 switching tubes of H6 multi-level inverter circuits, switching tube include two pole of body
Pipe；The anode of the hot end of first switch pipe and the high potential termination Boost translation circuit output ends of third switching tube；Second
The low potential of the cold end of switching tube and the 4th switching tube terminates the cathode of Boost translation circuit output ends；First switch pipe
Low potential terminate the 6th switching tube hot end, the 6th switching tube low potential termination second switch pipe hot end；
The low potential of third switching tube terminates the hot end of the 4th switching tube；The high potential termination third switching tube of 5th switching tube
Cold end, the hot end of the low potential termination second switch pipe of the 5th switching tube；It includes first to exchange output filter circuit
Inductance, the second inductance and third capacitance, the first inductance are connected on the cold end and how single-phase multi-level inverse conversion electricity of first switch pipe
Between first ac output end on road, the second inductance is connected on the cold end of third switching tube and single-phase multi-level inverter circuit the
Between two ac output ends；Third capacitance is connected between two ac output ends of how single-phase multi-level inverter circuit, and how electric H6 is
The control terminal of 6 switching tubes of flat inverter circuit connects the corresponding driving signal output end of the second driving circuit respectively.
5. two-stage type single-phase inverter according to claim 3, which is characterized in that single-phase multi-level inverter circuit includes
HERIC multi-level inverter circuits include 6 switching tubes, switching tube with output filter circuit, HERIC multi-level inverter circuits is exchanged
Including body diode；The hot end of first switch pipe and the high potential of third switching tube terminate Boost translation circuit output ends
Anode；The low potential of the cold end of second switch pipe and the 4th switching tube terminates the cathode of Boost translation circuit output ends；
The hot end of the low potential termination second switch pipe of first switch pipe, the low potential of third switching tube terminate the 4th switching tube
Hot end；The cold end of the high potential termination first switch pipe of 5th switching tube, the low potential termination the of the 5th switching tube
The cold end of six switching tubes, the high potential of the 6th switching tube terminate the hot end of the 4th switching tube；Exchange output filtered electrical
Road includes the first inductance, the second inductance and third capacitance, the first inductance be connected on the cold end of first switch pipe with it is how single-phase more
Between first ac output end of level inverter circuit, the second inductance is connected on the cold end of third switching tube and single-phase more level
Between the second ac output end of inverter circuit；Third capacitance be connected on how single-phase multi-level inverter circuit two ac output ends it
Between, the control terminal of 6 switching tubes of HERIC multi-level inverter circuits connects the corresponding drive signal output of the second driving circuit respectively
End.
6. two-stage type single-phase inverter according to claim 3, which is characterized in that direct current-direct current voltage boost circuit includes n
The Boost translation circuits of paralleling and interleaving.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110011558A (en) * | 2019-05-13 | 2019-07-12 | 东莞市港奇电子有限公司 | A kind of novel intelligent inverter and its control method |
| CN115664248A (en) * | 2022-12-14 | 2023-01-31 | 惠州市乐亿通科技有限公司 | Bidirectional inverter circuit and bidirectional inverter |
| WO2024009057A1 (en) * | 2022-07-06 | 2024-01-11 | Latent Drive Ltd | Apparatus for treatment of electrodes |
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2017
- 2017-11-08 CN CN201721479579.XU patent/CN207743895U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110011558A (en) * | 2019-05-13 | 2019-07-12 | 东莞市港奇电子有限公司 | A kind of novel intelligent inverter and its control method |
| CN110011558B (en) * | 2019-05-13 | 2024-02-23 | 东莞市港奇电子有限公司 | Control method for controlling novel intelligent inverter |
| WO2024009057A1 (en) * | 2022-07-06 | 2024-01-11 | Latent Drive Ltd | Apparatus for treatment of electrodes |
| CN115664248A (en) * | 2022-12-14 | 2023-01-31 | 惠州市乐亿通科技有限公司 | Bidirectional inverter circuit and bidirectional inverter |
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