CN103888010A - High-frequency isolated type three-level inverter based on push-pull converter - Google Patents
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- CN103888010A CN103888010A CN201410115038.3A CN201410115038A CN103888010A CN 103888010 A CN103888010 A CN 103888010A CN 201410115038 A CN201410115038 A CN 201410115038A CN 103888010 A CN103888010 A CN 103888010A
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Abstract
The invention provides a high-frequency isolated type three-level inverter based on a push-pull converter. The high-frequency isolated type three-level inverter is composed of an input direct-current power source unit, an input filter, a push-pull three-level inversion unit, a high-frequency transformer, a frequency converter, an output filter and an output alternating current load which are connected in sequence. The input direct-current power source unit is connected with one end of the input filter. The other end of the input filter is connected with one end of the push-pull three-level inversion unit. The other end of the push-pull three-level inversion unit is connected with a primary winding of the high-frequency transformer. A secondary winding of the high-frequency transformer is connected with the input end of the frequency converter. The output end of the frequency converter is connected with the input end of the output filter. The output end of the output filter is connected with the output alternating current load. The high-frequency isolated type three-level inverter has the advantages that the number of levels of power conversion is small, few power switch elements exist, voltage stress of a power switch tube is low, bidirectional power current and high-frequency electric isolation are achieved, and the voltage spectral characteristic of the front end of the output filter is good.
Description
Technical field
The invention belongs to Technics of Power Electronic Conversion technical field, particularly a kind of high frequency isolation type three-level inverter based on push-pull converter.
Background technology
Directly-friendship (DC-AC) converter technique is applied power semiconductor device, direct current energy is converted to a kind of static ac dc converter technology of constant voltage constant frequency AC energy, this constant voltage constant frequency alternating current can generate electricity by way of merging two or more grid systems for AC load electricity consumption or with AC network, is now widely used in the many aspects such as industrial production, scientific research.Directly-AC-AC converter is the key that realizes this static ac dc converter technology.At present, the domestic and international development for straight-AC-AC converter, mainly concentrate on two level straight-AC-AC converter and many level straight-straight, straight-hand over and friendship-DC converter, and for many level straight-the inverter research of AC-AC converter, the especially conversion of many level of high frequency isolation type two stage power is rarely seen has correlation technique open.
Existing multi-electrical level inverter mainly contains three class topological structures: (1) Diode-clamped inverter; (2) capacitor-clamped type inverter; (3) there is the cascaded inverter of independent DC power supply direct current.Diode-clamped, capacitor-clamped type multi-electrical level inverter have advantages of and are applicable to high input voltage high-power inverter occasion: the cascade multilevel inverter with independent DC power supply has and is applicable to low input, high output voltage high power contravariant occasion.But diode-clamped, the flat inversion transformation technique of capacitor-clamped many level of type multiple spot exist topological form single, without defects such as electrical isolation: there is the defects such as the complicated input side power factor of circuit topology is low, conversion efficiency is on the low side, power density is low in the cascading multiple electrical level inversion transformation technique with independent DC power supply.
Up to now, mainly concentrate on the two level DC/AC converters such as non-electrical isolation formula, low frequency and high frequency electrical isolation formula both at home and abroad for the research and development of DC/AC converter, to the research of push-pull converter, mainly concentrate on push-pull type DC/DC, AC/AC, AC/DC converter, comprise non-electrical isolation formula and electrical isolation formula.But traditional push-pull type two-level inverter, because it has the defects such as switching tube both end voltage stress is high, input side power factor (PF) is low, is not suitable for high-power occasion.
Summary of the invention
For the problem that multi-electrical level inverter in prior art is high at switching tube both end voltage stress, input side power factor (PF) is low, the object of the invention is to provide a kind of high frequency isolation type three-level inverter based on push-pull converter, it has that two stage power conversion (direct current DC-high-frequency ac HFAC-low-frequency ac LFAC), bidirectional power flow, output filter front voltage spectral characteristic are good, the voltage stress of high power density, switching device is low, and can realize AC load and DC power supply high frequency electrical isolation.
For reaching above-mentioned purpose, the technical solution adopted in the present invention is as follows:
A kind of high frequency isolation type three-level inverter based on push-pull converter, by the input dc power source unit connecting successively, input filter, push-pull type tri-level inversion unit, high frequency transformer, frequency converter, output filter and output AC load form, wherein: input dc power source unit is connected with one end of input filter, the other end of input filter is connected with one end of push-pull type tri-level inversion unit, the other end of push-pull type tri-level inversion unit is connected with the armature winding of high frequency transformer, the secondary winding of high frequency transformer is connected with the input of frequency converter, the output of frequency converter is connected with the input of output filter, the output of output filter is connected with output AC load.
Further, in embodiment, described frequency converter is bridge-type frequency converter.
Further in embodiment, described input filter comprises input filter inductance and input filter capacitor, wherein, the reference positive pole of input DC power is connected with one end of input filter inductance, the other end of input filter inductance respectively with one end of positive pole and the push-pull type tri-level inversion unit of input filter capacitor, the negative pole of input filter capacitor is connected with the reference negative pole of input DC power;
Described high frequency transformer comprises the first former limit winding, the second former limit winding and the 3rd secondary winding, and the first former limit winding is connected with described push-pull type tri-level inversion unit with the second former limit winding, and the 3rd secondary winding is connected with described frequency converter;
Described push-pull type tri-level inversion unit comprises the first power switch pipe and the first diode, the second power switch pipe and the second diode, the 3rd power switch pipe and the 3rd diode, the 4th power switch pipe and the 4th diode, the 5th power switch pipe and the 5th diode, the 6th power switch pipe and the 6th diode, wherein, the drain electrode of anode respectively with the second power switch pipe and the drain electrode of the 3rd power switch pipe of the first power switch pipe are connected, the first diode, the second diode and the inverse parallel of the 3rd diode difference are in the first power switch pipe, the two ends of the second power switch pipe and the 3rd power switch pipe, the negative electrode of the first diode is connected with the drain electrode of the first power switch pipe, the anode of the first diode is connected with the source electrode of the first power switch pipe, the negative electrode of the second diode is connected with the drain electrode of the second power switch pipe, the anode of the second diode is connected with the source electrode of the second power switch pipe, the negative electrode of the 3rd diode is connected with the drain electrode of the 3rd power switch pipe, the anode of the 3rd diode is connected with the source electrode of the 3rd power switch pipe, the drain electrode of the anode of the 4th power switch pipe the respectively with five power switch pipe and the drain electrode of the 6th power switch pipe are connected, the 4th diode, the 5th diode and the inverse parallel of the 6th diode difference are in the 4th power switch pipe, the two ends of the 5th power switch pipe and the 6th power switch pipe, the negative electrode of the 4th diode is connected with the drain electrode of the 4th power switch pipe, the anode of the 4th diode is connected with the source electrode of the 4th power switch pipe, the negative electrode of the 5th diode is connected with the drain electrode of the 5th power switch pipe, the anode of the 5th diode is connected with the source electrode of the 5th power switch pipe, the negative electrode of the 6th diode is connected with the drain electrode of the 6th power switch pipe, the anode of the 6th diode is connected with the source electrode of the 6th power switch pipe, the source electrode of the second power switch pipe is connected with the Same Name of Ends of the first former limit winding of high frequency transformer, the source electrode of the 5th power switch pipe is connected with the non-same polarity of the second former limit winding of high frequency transformer, after being connected with the Same Name of Ends of the second former limit winding, the non-same polarity of the first former limit winding is connected with the source electrode of the 3rd power switch pipe and the source electrode of six power switch pipes, the source electrode of the source electrode of the 3rd power switch pipe and the 6th power switch pipe is connected with the negative pole of input filter after connecting, be connected with the negative pole of input DC power again,
Described bridge-type frequency converter is by the first four-quadrant power switch pipe, the second four-quadrant power switch pipe, the 3rd four-quadrant power switch pipe, the 4th four-quadrant power switch pipe forms, the first four-quadrant power switch pipe is by the 7th power switch pipe, the 8th power switch pipe, the 7th diode, the 8th diode forms, the second four-quadrant power switch pipe is by the 9th power switch pipe, the tenth power switch pipe, the 9th diode, the tenth diode forms, the 3rd four-quadrant power switch pipe is by the 11 power switch pipe, the 12 power switch pipe, the 11 diode, the 12 diode forms, the 4th four-quadrant power switch pipe is by the 13 power switch pipe, the 14 power switch pipe, the 13 diode, the 14 diode forms, wherein:
The drain electrode of the Same Name of Ends of the 3rd secondary winding of high frequency transformer and the 8th power switch pipe of described bridge-type frequency converter, the negative electrode of the 8th diode, the drain electrode of the 11 power switch pipe, the negative electrode of the 11 diode link together, and the source electrode of the source electrode of the 8th power switch pipe of described bridge-type frequency converter, the anode of the 8th diode, the 7th power switch pipe, the anodic bonding of the 7th diode are together;
The drain electrode of the drain electrode of the 7th power switch pipe of described bridge-type frequency converter, the negative electrode of the 7th diode, the 9th power switch pipe, the negative electrode of the 9th diode link together, and the source electrode of the source electrode of the 8th device power switch pipe of described bridge-type frequency converter, the anode of the 9th diode, the tenth power switch pipe, the anodic bonding of the tenth diode are together;
The drain electrode of the tenth power switch pipe of described bridge-type frequency converter, the negative electrode of the tenth diode, the drain electrode of the 13 power switch pipe, the negative electrode of the 13 diode link together, and the drain electrode of the non-same polarity of the 3rd secondary winding of high frequency transformer and the tenth power switch pipe of described bridge-type frequency converter, the negative electrode of the tenth diode, the drain electrode of the 13 power switch pipe, the negative electrode of the 13 diode link together;
Together, the drain electrode of the 14 power switch pipe of described bridge-type frequency converter, the negative electrode of the 14 diode, the drain electrode of the 12 power switch pipe, the negative electrode of the 12 diode link together for the source electrode of the source electrode of the 13 power switch pipe of described bridge-type frequency converter, the anode of the 13 diode, the 14 power switch pipe, the anodic bonding of the 13 diode;
The source electrode of the source electrode of the 12 power switch pipe of described bridge-type frequency converter, the anode of the 12 diode, the 11 power switch pipe, the anodic bonding of the 11 diode are together;
Described output filter comprises output inductor and output filter capacitor, wherein, the positive pole of output filter capacitor is connected with the drain electrode of the 7th power switch pipe in frequency converter, the negative electrode of the 7th diode, the drain electrode of the 9th power switch pipe, the negative electrode of the 9th diode, and the negative pole of output filter capacitor is connected with the drain electrode of the 12 power switch pipe in frequency converter, the negative electrode of the 12 diode, the drain electrode of the 14 power switch pipe, the negative electrode of the 14 diode;
The positive pole of the output filter capacitor of described output filter and negative pole are connected respectively the two ends of output AC load.
Further, in embodiment, should adopt the pulse modulation chopping way of active-clamp to control by the high frequency isolation type three-level inverter based on push-pull converter.
From the above technical solution of the present invention shows that, the high frequency isolation type three-level inverter based on push-pull converter that the present invention proposes, compared with prior art, its remarkable advantage is:
(1) drawing formula High Frequency Link three-level inverter compares with push-pull type two-level inverter, the power switch both end voltage of this inverter is three level voltage ripples, reduce the voltage stress of power switch, can be applicable to the high-voltage inverted occasion of high frequency electrical isolation, widen the application of three-level inverter;
(2) in input DC power and AC load, insert high-frequency isolation transformer, can realize the electrical isolation of input side and load-side, the use of high-frequency isolation transformer can realize miniaturization, the lightweight of converter, improves the efficiency of converter;
(3), compared with traditional multi-electrical level inverter, this inverter circuit topology is succinct, reduced power conversion progression, and can realize the two-way flow of power.
(4) output voltage stabilization, efficiency is high, applicable to the high-voltage large-capacity occasion that requires electrical isolation.
Accompanying drawing explanation
Fig. 1 is the circuit topology figure of the high frequency isolation type three-level inverter of an embodiment of the present invention based on push-pull converter.
Embodiment
In order more to understand technology contents of the present invention, especially exemplified by specific embodiment and coordinate appended graphic being described as follows.
Figure 1 shows that the circuit topology graph structure of the high frequency isolation type three-level inverter of an embodiment of the present invention based on push-pull converter, wherein, a kind of high frequency isolation type three-level inverter based on push-pull converter, by the input dc power source unit 1 connecting successively, input filter 2, push-pull type tri-level inversion unit 3, high frequency transformer 4, frequency converter 5, output filter 6 and output AC load 7 form, input dc power source unit 1 is connected with one end of input filter 2, the other end of input filter 2 is connected with one end of push-pull type tri-level inversion unit 3, the other end of push-pull type tri-level inversion unit 3 is connected with the armature winding of high frequency transformer 4, the secondary winding of high frequency transformer 4 is connected with the input of frequency converter 5, the output of frequency converter 5 is connected with the input of output filter 6, the output of output filter 6 is connected with output AC load 7.
As preferred embodiment, frequency converter 5 is selected bridge-type frequency converter.
As shown in Figure 1, in the present embodiment, input filter 2 comprises input filter inductance L
0with input filter capacitor C
0, wherein, input DC power U
ireference anodal with input filter inductance L
0one end connect, input filter inductance L
0the other end respectively with input filter capacitor C
0positive pole and one end of push-pull type tri-level inversion unit 3, input filter capacitor C
0negative pole and input DC power U
ireference negative pole connect.
Described high frequency transformer comprises the first former limit winding N1, the second former limit winding N2 and the 3rd secondary winding N3, the first former limit winding N1 is connected with described push-pull type tri-level inversion unit 3 with the second former limit winding N2, and the 3rd secondary winding N3 is connected with described frequency converter 5.The first former limit winding N1, the second former limit winding N2 are described armature winding, and the 3rd secondary winding N3 is described secondary winding.
Described push-pull type tri-level inversion unit 3 comprises the first power switch tube S 1 and the first diode D1, the second power switch tube S 2 and the second diode D2, the 3rd power switch tube S 3 and the 3rd diode D3, the 4th power switch tube S 4 and the 4th diode D4, the 5th power switch tube S 5 and the 5th diode D5, the 6th power switch tube S 6 and the 6th diode D6, wherein:
The drain electrode of anode respectively with the second power switch tube S 2 and the drain electrode of the 3rd power switch tube S 3 of the first power switch tube S 1 are connected, the first diode D1, the second diode D2 and the inverse parallel of the 3rd diode D3 difference are in the first power switch tube S 1, the two ends of the second power switch tube S 2 and the 3rd power switch tube S 3, the negative electrode D1 of the first diode is connected with the drain electrode of the first power switch tube S 1, the anode of the first diode D1 is connected with the source electrode of the first power switch tube S 1, the negative electrode of the second diode D2 is connected with the drain electrode of the second power switch tube S 2, the anode of the second diode D2 is connected with the source electrode of the second power switch tube S 2, the negative electrode of the 3rd diode D3 is connected with the drain electrode of the 3rd power switch tube S 3, the anode of the 3rd diode D3 is connected with the source electrode of the 3rd power switch tube S 3, the drain electrode of the anode of the 4th power switch tube S 4 the respectively with five power switch tube S 5 and the drain electrode of the 6th power switch tube S 6 are connected, the 4th diode D4, the 5th diode D5 and the inverse parallel of the 6th diode D6 difference are in the 4th power switch tube S 4, the two ends of the 5th power switch tube S 5 and the 6th power switch tube S 6, the negative electrode D4 of the 4th diode is connected with the drain electrode of the 4th power switch tube S 4, the anode of the 4th diode D4 is connected with the source electrode of the 4th power switch tube S 4, the negative electrode of the 5th diode D5 is connected with the drain electrode of the 5th power switch tube S 5, the anode of the 5th diode D5 is connected with the source electrode of the 5th power switch tube S 5, the negative electrode of the 6th diode D6 is connected with the drain electrode of the 6th power switch tube S 6, the anode of the 6th diode D6 is connected with the source electrode of the 6th power switch tube S 6, the source electrode of the second power switch tube S 2 is connected with the Same Name of Ends of the first former limit winding N1 of high frequency transformer 4, the source electrode of the 5th power switch tube S 5 is connected with the non-same polarity of the second former limit winding N2 of high frequency transformer 4, after being connected with the Same Name of Ends of the second former limit winding N2, the non-same polarity of the first former limit winding N1 is connected with the source electrode of the 3rd power switch tube S 3 and the source electrode of six power switch tube S 6, the source electrode of the source electrode of the 3rd power switch tube S 3 and six power switch tube S 6 is connected with the negative pole of input filter 2 after connecting, again with input DC power U
inegative pole connect.
Input DC power U
ireference anodal with input filter inductance L
0one end connect, input filter inductance L
0the other end respectively with input filter capacitor C
0positive pole and the drain electrode of the first power switch tube S 1, the drain electrode of the 4th power switch tube S 4 be connected.
Described bridge-type frequency converter 5 is by the first four-quadrant power switch tube S A, the second four-quadrant power switch tube S B, the 3rd four-quadrant power switch tube S C, the 4th four-quadrant power switch tube S D forms, the first four-quadrant power switch tube S A is by the 7th power switch tube S 7, the 8th power switch tube S 8, the 7th diode D7, the 8th diode D8 forms, the second four-quadrant power switch tube S B is by the 9th power switch tube S 9, the tenth power switch tube S 10, the 9th diode D9, the tenth diode D10 forms, the 3rd four-quadrant power switch tube S C is by the 11 power switch tube S 11, the 12 power switch tube S 12, the 11 diode D11, the 12 diode D12 forms, the 4th four-quadrant power switch tube S D is by the 13 power switch tube S 13, the 14 power switch tube S 14, the 13 diode D13, the 14 diode D14 forms, wherein:
The 3rd Same Name of Ends of secondary winding N3 of high frequency transformer 4 and the drain electrode of the 8th power switch tube S 8 of described bridge-type frequency converter 5, the negative electrode of the 8th diode D8, the drain electrode of the 11 power switch tube S 11, the negative electrode of the 11 diode D11 links together, the source electrode of the 8th power switch tube S 8 of described bridge-type frequency converter 5, the anode of the 8th diode D8, the source electrode of the 7th power switch tube S 7, the anodic bonding of the 7th diode D7 together, the drain electrode of the 7th power switch tube S 7 of described bridge-type frequency converter (5), the negative electrode of the 7th diode D7, the drain electrode of the 9th power switch tube S 9, the negative electrode of the 9th diode D9 links together, the source electrode of the 8th device power switch tube S 9 of described bridge-type frequency converter 5, the anode of the 9th diode D9, the source electrode of the tenth power switch tube S 10, the anodic bonding of the tenth diode D10 together, the drain electrode of the tenth power switch tube S 10 of described bridge-type frequency converter 5, the negative electrode of the tenth diode D10, the drain electrode of the 13 power switch tube S 13, the negative electrode of the 13 diode D13 links together, the 3rd non-same polarity of secondary winding N3 of high frequency transformer 4 and the drain electrode of the tenth power switch tube S 10 of described bridge-type frequency converter 5, the negative electrode of the tenth diode D10, the drain electrode of the 13 power switch tube S 13, the negative electrode of the 13 diode D13 links together, the source electrode of the 13 power switch tube S 13 of described bridge-type frequency converter 5, the anode of the 13 diode D13, the source electrode of the 14 power switch tube S 14, the anodic bonding of the 13 diode D14 together, the drain electrode of the 14 power switch tube S 14 of described bridge-type frequency converter 5, the negative electrode of the 14 diode D14, the drain electrode of the 12 power switch tube S 12, the negative electrode of the 12 diode D12 links together, the source electrode of the 12 power switch tube S 12 of described bridge-type frequency converter 5, the anode of the 12 diode D12, the source electrode of the 11 power switch tube S 11, the anodic bonding of the 11 diode D11 together.
As Fig. 1, described output filter 6 comprises output inductor Lf and output filter capacitor Cf, wherein, the positive pole of output filter capacitor Cf is connected with the drain electrode of the 7th power switch tube S 7 in frequency converter 5, the negative electrode of the 7th diode D7, the drain electrode of the 9th power switch tube S 9, the negative electrode of the 9th diode D9, and the negative pole of output filter capacitor Cf is connected with the drain electrode of the 12 power switch tube S 12 in frequency converter 5, the negative electrode of the 12 diode D12, the drain electrode of the 14 power switch tube S 14, the negative electrode of the 14 diode D14.
Described output AC load 7 comprises AC load ZL, and the two ends of AC load ZL are connected with positive pole and the negative pole of output filter capacitor Cf respectively.
The high frequency isolation type three-level inverter based on push-pull converter shown in Fig. 1 embodiment, preferably adopts the control mode of pulse modulation (SPWM) copped wave of active-clamp.As unsettled high input voltage direct current U
iduring to AC load ZL transmitted power, by the alternate conduction of power switch pipe, can make power switch pipe two ends obtain three kinds of level u1, u2, u3, input supply voltage is modulated into ambipolar high-frequency pulse voltage through high frequency isolation type tri-level inversion unit, by the isolation of high frequency transformer, after transmission, frequency converter is demodulated into unipolar low-frequency pulse voltage, after carrying out output filtering, stablized by output filter again or adjustable sinusoidal voltage uo, this inverter has four-quadrant operation ability, therefore can be with perception, capacitive, resistive and rectified load, the control circuit of this inverter can be adjusted according to the character of AC load, thereby stablized or adjustable voltage at output.Unsettled high voltage direct current is transformed into stable or adjustable sine electricity by this converter, and reduce power conversion progression, realize high frequency electrical isolation, being applicable to high voltage direct-alternation carry over closes, Lf, Cf form output filter, high pressure harmonic wave in the output voltage of the frequency converter described in this output filter filtering, thus high-quality sinusoidal voltage uo obtained in output AC load-side.
Although the present invention discloses as above with preferred embodiment, so it is not in order to limit the present invention.Persond having ordinary knowledge in the technical field of the present invention, without departing from the spirit and scope of the present invention, when being used for a variety of modifications and variations.Therefore, protection scope of the present invention is when being as the criterion depending on claims person of defining.
Claims (4)
1. the high frequency isolation type three-level inverter based on push-pull converter, it is characterized in that, by the input dc power source unit connecting successively, input filter, push-pull type tri-level inversion unit, high frequency transformer, frequency converter, output filter and output AC load form, wherein: input dc power source unit is connected with one end of input filter, the other end of input filter is connected with one end of push-pull type tri-level inversion unit, the other end of push-pull type tri-level inversion unit is connected with the armature winding of high frequency transformer, the secondary winding of high frequency transformer is connected with the input of frequency converter, the output of frequency converter is connected with the input of output filter, the output of output filter is connected with output AC load.
2. the high frequency isolation type three-level inverter based on push-pull converter according to claim 1, is characterized in that, described frequency converter is bridge-type frequency converter.
3. the high frequency isolation type three-level inverter based on push-pull converter according to claim 2, it is characterized in that, described input filter comprises input filter inductance and input filter capacitor, wherein, the reference positive pole of input DC power is connected with one end of input filter inductance, the other end of input filter inductance respectively with one end of positive pole and the push-pull type tri-level inversion unit of input filter capacitor, the negative pole of input filter capacitor is connected with the reference negative pole of input DC power;
Described high frequency transformer comprises the first former limit winding, the second former limit winding and the 3rd secondary winding, and the first former limit winding is connected with described push-pull type tri-level inversion unit with the second former limit winding, and the 3rd secondary winding is connected with described frequency converter;
Described push-pull type tri-level inversion unit comprises the first power switch pipe and the first diode, the second power switch pipe and the second diode, the 3rd power switch pipe and the 3rd diode, the 4th power switch pipe and the 4th diode, the 5th power switch pipe and the 5th diode, the 6th power switch pipe and the 6th diode, wherein, the drain electrode of anode respectively with the second power switch pipe and the drain electrode of the 3rd power switch pipe of the first power switch pipe are connected, the first diode, the second diode and the inverse parallel of the 3rd diode difference are in the first power switch pipe, the two ends of the second power switch pipe and the 3rd power switch pipe, the negative electrode of the first diode is connected with the drain electrode of the first power switch pipe, the anode of the first diode is connected with the source electrode of the first power switch pipe, the negative electrode of the second diode is connected with the drain electrode of the second power switch pipe, the anode of the second diode is connected with the source electrode of the second power switch pipe, the negative electrode of the 3rd diode is connected with the drain electrode of the 3rd power switch pipe, the anode of the 3rd diode is connected with the source electrode of the 3rd power switch pipe, the drain electrode of the anode of the 4th power switch pipe the respectively with five power switch pipe and the drain electrode of the 6th power switch pipe are connected, the 4th diode, the 5th diode and the inverse parallel of the 6th diode difference are in the 4th power switch pipe, the two ends of the 5th power switch pipe and the 6th power switch pipe, the negative electrode of the 4th diode is connected with the drain electrode of the 4th power switch pipe, the anode of the 4th diode is connected with the source electrode of the 4th power switch pipe, the negative electrode of the 5th diode is connected with the drain electrode of the 5th power switch pipe, the anode of the 5th diode is connected with the source electrode of the 5th power switch pipe, the negative electrode of the 6th diode is connected with the drain electrode of the 6th power switch pipe, the anode of the 6th diode is connected with the source electrode of the 6th power switch pipe, the source electrode of the second power switch pipe is connected with the Same Name of Ends of the first former limit winding of high frequency transformer, the source electrode of the 5th power switch pipe is connected with the non-same polarity of the second former limit winding of high frequency transformer, after being connected with the Same Name of Ends of the second former limit winding, the non-same polarity of the first former limit winding is connected with the source electrode of the 3rd power switch pipe and the source electrode of six power switch pipes, the source electrode of the source electrode of the 3rd power switch pipe and the 6th power switch pipe is connected with the negative pole of input filter after connecting, be connected with the negative pole of input DC power again,
Described bridge-type frequency converter is by the first four-quadrant power switch pipe, the second four-quadrant power switch pipe, the 3rd four-quadrant power switch pipe, the 4th four-quadrant power switch pipe forms, the first four-quadrant power switch pipe is by the 7th power switch pipe, the 8th power switch pipe, the 7th diode, the 8th diode forms, the second four-quadrant power switch pipe is by the 9th power switch pipe, the tenth power switch pipe, the 9th diode, the tenth diode forms, the 3rd four-quadrant power switch pipe is by the 11 power switch pipe, the 12 power switch pipe, the 11 diode, the 12 diode forms, the 4th four-quadrant power switch pipe is by the 13 power switch pipe, the 14 power switch pipe, the 13 diode, the 14 diode forms, wherein:
The drain electrode of the Same Name of Ends of the 3rd secondary winding of high frequency transformer and the 8th power switch pipe of described bridge-type frequency converter, the negative electrode of the 8th diode, the drain electrode of the 11 power switch pipe, the negative electrode of the 11 diode link together, and the source electrode of the source electrode of the 8th power switch pipe of described bridge-type frequency converter, the anode of the 8th diode, the 7th power switch pipe, the anodic bonding of the 7th diode are together;
The drain electrode of the drain electrode of the 7th power switch pipe of described bridge-type frequency converter, the negative electrode of the 7th diode, the 9th power switch pipe, the negative electrode of the 9th diode link together, and the source electrode of the source electrode of the 8th device power switch pipe of described bridge-type frequency converter, the anode of the 9th diode, the tenth power switch pipe, the anodic bonding of the tenth diode are together;
The drain electrode of the tenth power switch pipe of described bridge-type frequency converter, the negative electrode of the tenth diode, the drain electrode of the 13 power switch pipe, the negative electrode of the 13 diode link together, and the drain electrode of the non-same polarity of the 3rd secondary winding of high frequency transformer and the tenth power switch pipe of described bridge-type frequency converter, the negative electrode of the tenth diode, the drain electrode of the 13 power switch pipe, the negative electrode of the 13 diode link together;
Together, the drain electrode of the 14 power switch pipe of described bridge-type frequency converter, the negative electrode of the 14 diode, the drain electrode of the 12 power switch pipe, the negative electrode of the 12 diode link together for the source electrode of the source electrode of the 13 power switch pipe of described bridge-type frequency converter, the anode of the 13 diode, the 14 power switch pipe, the anodic bonding of the 13 diode;
The source electrode of the source electrode of the 12 power switch pipe of described bridge-type frequency converter, the anode of the 12 diode, the 11 power switch pipe, the anodic bonding of the 11 diode are together;
Described output filter comprises output inductor and output filter capacitor, wherein, the positive pole of output filter capacitor is connected with the drain electrode of the 7th power switch pipe in frequency converter, the negative electrode of the 7th diode, the drain electrode of the 9th power switch pipe, the negative electrode of the 9th diode, and the negative pole of output filter capacitor is connected with the drain electrode of the 12 power switch pipe in frequency converter, the negative electrode of the 12 diode, the drain electrode of the 14 power switch pipe, the negative electrode of the 14 diode;
The positive pole of the output filter capacitor of described output filter and negative pole are connected respectively the two ends of output AC load.
4. the high frequency isolation type three-level inverter based on push-pull converter according to claim 1, is characterized in that, should adopt the pulse modulation chopping way of active-clamp to control by the high frequency isolation type three-level inverter based on push-pull converter.
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| CN201410115038.3A CN103888010A (en) | 2014-03-26 | 2014-03-26 | High-frequency isolated type three-level inverter based on push-pull converter |
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| CN201410115038.3A CN103888010A (en) | 2014-03-26 | 2014-03-26 | High-frequency isolated type three-level inverter based on push-pull converter |
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Cited By (6)
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| CN104167925A (en) * | 2014-09-01 | 2014-11-26 | 南京理工大学 | Two-way direct-current converter based on phase-shifted full bridge and synchronous rectification |
| CN105048850A (en) * | 2015-07-02 | 2015-11-11 | 南京航空航天大学 | Single-stage ZVS-type push-pull-type high-frequency link DC/AC converter |
| CN105990877A (en) * | 2015-03-19 | 2016-10-05 | Tdk株式会社 | Series compensating electric power transmission system |
| CN108712083A (en) * | 2018-05-28 | 2018-10-26 | 钟曙 | A kind of three switch push-pulls input High Frequency Link single-stage inverter circuit |
| CN109861541A (en) * | 2018-12-26 | 2019-06-07 | 东北大学 | Five level H-bridges of one kind recommend bidirectional, dc transformation topology structure |
| CN112653349A (en) * | 2020-12-22 | 2021-04-13 | 航天科技控股集团股份有限公司 | Main circuit of 2000W vehicle-mounted inverter |
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| CN101931337A (en) * | 2010-09-09 | 2010-12-29 | 西安交通大学 | Chopper inverter circuit for photovoltaic power generation and control method thereof |
| CN102969898A (en) * | 2012-11-29 | 2013-03-13 | 盐城工学院 | Low-voltage wide-input three-level full-bridge converter and control method thereof |
| CN203933435U (en) * | 2014-03-26 | 2014-11-05 | 南京理工大学 | High frequency isolation type three-level inverter based on push-pull converter |
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| CN101931337A (en) * | 2010-09-09 | 2010-12-29 | 西安交通大学 | Chopper inverter circuit for photovoltaic power generation and control method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104167925A (en) * | 2014-09-01 | 2014-11-26 | 南京理工大学 | Two-way direct-current converter based on phase-shifted full bridge and synchronous rectification |
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| CN105990877A (en) * | 2015-03-19 | 2016-10-05 | Tdk株式会社 | Series compensating electric power transmission system |
| CN105990877B (en) * | 2015-03-19 | 2018-10-16 | Tdk株式会社 | Series compensation type electrical power transmission system |
| CN105048850A (en) * | 2015-07-02 | 2015-11-11 | 南京航空航天大学 | Single-stage ZVS-type push-pull-type high-frequency link DC/AC converter |
| CN105048850B (en) * | 2015-07-02 | 2018-10-16 | 南京航空航天大学 | A kind of single-stage ZVS types push-pull type high frequency link DC/AC converters |
| CN108712083A (en) * | 2018-05-28 | 2018-10-26 | 钟曙 | A kind of three switch push-pulls input High Frequency Link single-stage inverter circuit |
| CN109861541A (en) * | 2018-12-26 | 2019-06-07 | 东北大学 | Five level H-bridges of one kind recommend bidirectional, dc transformation topology structure |
| CN112653349A (en) * | 2020-12-22 | 2021-04-13 | 航天科技控股集团股份有限公司 | Main circuit of 2000W vehicle-mounted inverter |
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