CN107257200A - The many pulse wave resin-cast phase-shifting commutation transformation systems of Large Copacity - Google Patents
The many pulse wave resin-cast phase-shifting commutation transformation systems of Large Copacity Download PDFInfo
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- CN107257200A CN107257200A CN201710612299.XA CN201710612299A CN107257200A CN 107257200 A CN107257200 A CN 107257200A CN 201710612299 A CN201710612299 A CN 201710612299A CN 107257200 A CN107257200 A CN 107257200A
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Classifications
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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
-
- 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
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/02—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc
- H02M5/04—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters
- H02M5/10—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using transformers
- H02M5/12—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using transformers for conversion of voltage or current amplitude only
Abstract
A kind of many pulse wave resin-cast phase-shifting commutation transformation systems of Large Copacity, including the phase-shifting rectifier transformer docked with rectification unit；Phase-shifting rectifier transformer sets m platforms, and each phase-shifting rectifier transformer docks to form n pulse wave rectifiers with rectification unit；Each phase-shifting rectifier transformer is using primary side and secondary side phase shift simultaneously, and wherein primary side phase shift angle is different, secondary side phase shift angle all same；Secondary side is divided into d big winding, and each big winding has n/2md small windings, the magnetic flux of n/2md group outs of phase is produced respectively, the secondary side of each phase-shifting rectifier transformer exports the voltage of n/md angle altogether, differ 360/n ° between each angle, n, m and d are respectively natural number, and n >=48.The present invention finds the probability of suitable number of turns combination and greatly promoted by setting new winding construction and arrangement method to realize the voltage output of Large Copacity pulse wave and higher pulse wave.
Description
Technical field
The present invention relates to bank electricity phase shift converter technique field, more particularly to a kind of many pulse wave resins of the Large Copacity of bank electricity are poured
Note phase-shifting commutation transformation system.
Background technology
With continuing to develop for bank electricity technology, increasing ship is powered when pulling in shore using shore electric power, to substitute
The diesel-driven generator of traditional high pollution is powered.Because the frequency of supply standard of China's power network is 50Hz, and it is external many peculiar to vessel
The electricity consumption frequency of equipment is 60HZ, and in order to comply with the bank electricity demand of external large-tonnage ship, bank electricity portable power source system needs logical
Excessive power converter unit realizes frequency transformation.Power output is bigger, and corresponding supply voltage grade is also higher, due to single
The highest operating voltage of low voltage frequency converter rectification unit is usually no more than 700V, in order to export higher voltage, and also to subtract
Few influence of the harmonic wave to user, need to be realized by the series connection of multiple converter units.One of each converter unit correspondence transformer
Winding is exported, so as to cause the winding quantity of phase-shifting transformer powered to bank electricity also more and more.Therefore to bank electricity frequency conversion system
The phase-shifting rectifier transformer powered unite to Large Copacity, the direction of Multiple coil is developed.
In order to improve the power supply quality of converter power supply, requirement of the current bank electricity user to phase-shifting transformer is commonly：1)
Each secondary idle load output voltage tolerance is -1.5~+2.5%；2) output voltage degree of unbalancedness is not more than 2%；3) phase shifting angle
Error is spent within ± 0.8 °.It is also bigger per the voltage produced by circle line in coil because the capacity of transformer is bigger, and it is each
The output voltage of secondary Phase shift winding is matched with frequency converter, is certain, therefore the number of turn of secondary Phase shift winding is less and less.Move
Phase transformer exports different level angles come what is realized generally by each secondary winding, and the number of windings is more, it is meant that winding
The angle of output voltage is more.And level angle is the number of turn proportioning by the main winding in each small winding and Phase shift winding to determine
Fixed, the number of turn is fewer, can meet different voltage outputs and ensure that the number of turn combination of required precision is fewer.It can be seen that, phase-shifting commutation becomes
It is two conflicting demands that the increasing capacity of depressor and increasing winding, which are exported,；Chinese patent literature number
CN204668101U disclosed a kind of winding construction of separate unit rectifier transformer in the body of September 23 in 2015, specifically disclosed：Using
Net side phase shift, source side winding is in parallel and with two phase shift angles；Valve side has four windings and produces two groups of differences respectively
The magnetic flux of phase, makes the output voltage phase of four groups of valve sides differ 15 ° or 7.5 ° between the two up and down；Described separate unit rectifier
Docking forms 24 pulse wave rectifiers, and two rectifiers dock to form 48 pulse wave rectifiers.During the displaceable valve phase of the structure, the pulse wave of separate unit 24
Product maximum capacity can only accomplish 1250kVA, and either pulse number or capacity can not meet using for high-power bank electricity
It is required that, therefore, it is necessary to be further improved.
The content of the invention
The purpose of the present invention aims to provide a kind of Large Copacity for the voltage output that can realize Large Copacity pulse wave and higher pulse wave
Many pulse wave resin-cast phase-shifting commutation transformation systems, to overcome weak point of the prior art.
By this purpose design a kind of many pulse wave resin-cast phase-shifting commutation transformation systems of Large Copacity, including with rectification unit
The phase-shifting rectifier transformer of docking；It is characterized in that：The phase-shifting rectifier transformer sets m platforms, each phase-shifting rectifier transformer with
Rectification unit docks to form n pulse wave rectifiers；Each phase-shifting rectifier transformer is using primary side and secondary side phase shift simultaneously, wherein once
Side phase shift angle is different, secondary side phase shift angle all same；Secondary side is divided into d big winding, and each big winding has n/2md
Individual small winding, produces the magnetic flux of n/2md group outs of phase respectively, and the secondary side of each phase-shifting rectifier transformer exports n/md angle altogether
360/n ° is differed between the voltage of degree, each angle, n, m and d are respectively natural number, and n >=48.
The primary side phase shift angle of at least one phase-shifting rectifier transformer is+180/n °, at least one phase-shifting commutation
The primary side phase shift angle of transformer is -180/n °.
The secondary side phase shift angle of each phase-shifting rectifier transformer is is ± 720i/n ° or ± 360i/n °, and i is natural number.
Each small winding is arranged in order the one big winding of composition by phase shift angle from big to small；Major windings press upper, middle and lower successively
It is arranged to make up a phase coil.
The phase-shifting rectifier transformer is provided with boss, and boss side is provided with tap nut, and boss opposite side is provided with
Non- tap nut.
Be provided with assists winding and cooling fan on the phase-shifting rectifier transformer, assists winding be used for pre-magnetizing in advance and
Powered for cooling fan.
It is used as specific embodiment：The phase-shifting rectifier transformer setting two, each phase-shifting rectifier transformer and rectification list
Member docking forms 60 pulse wave rectifiers；The secondary side of each phase-shifting rectifier transformer is divided into 3 big winding, and each big winding is divided into 5
Small winding, and the magnetic flux of 5 groups of outs of phase is produced, the secondary side of two phase-shifting rectifier transformers is exported the electricity of 10 angles altogether
6 ° are differed between pressure, each angle.
It is used as another specific embodiment：The phase-shifting rectifier transformer sets two, each phase-shifting rectifier transformer with it is whole
Stream unit docks to form 72 pulse wave rectifiers；The secondary side of each phase-shifting rectifier transformer is divided into 3 big winding, and each big winding is divided into
6 small windings, and the magnetic flux of 6 groups of outs of phase is produced, the secondary side of two phase-shifting rectifier transformers is exported 12 angles altogether
Voltage, 5 ° are differed between each angle.
The present invention winding construction new by setting and arrangement method can realize the voltage of Large Copacity pulse wave and higher pulse wave
Export, and find the probability of suitable number of turns combination and greatly promote；By setting tap nut to concentrate on the side of boss, non-tap
Nut concentrates on the opposite side of boss to facilitate user discrimination and wiring；By setting assists winding to reduce to power network
Temperature rise when pollution and reduction transformer station high-voltage side bus, improves the operational reliability of transformer.
Brief description of the drawings
Fig. 1 is that the first winding phase shift angle of phase-shifting rectifier transformer 1 of first embodiment of the invention is -3 ° of vectogram.
Fig. 2 is that the first winding phase shift angle of phase-shifting rectifier transformer 1 of first embodiment of the invention is+24 ° of vectogram.
Fig. 3 is that the first winding phase shift angle of phase-shifting rectifier transformer 1 of first embodiment of the invention is+12 ° of vectogram.
Fig. 4 is that the first winding phase shift angle of phase-shifting rectifier transformer 1 of first embodiment of the invention is 0 ° of vectogram.
Fig. 5 is that the first winding phase shift angle of phase-shifting rectifier transformer 1 of first embodiment of the invention is -12 ° of vectogram.
Fig. 6 is that the first winding phase shift angle of phase-shifting rectifier transformer 1 of first embodiment of the invention is -24 ° of vectogram.
Fig. 7 is that the first winding phase shift angle of phase-shifting rectifier transformer 2 of first embodiment of the invention is+3 ° of vectogram.
Fig. 8 is that the first winding phase shift angle of phase-shifting rectifier transformer 2 of first embodiment of the invention is+24 ° of vectogram.
Fig. 9 is that the first winding phase shift angle of phase-shifting rectifier transformer 2 of first embodiment of the invention is+12 ° of vectogram.
Figure 10 is that the first winding phase shift angle of phase-shifting rectifier transformer 2 of first embodiment of the invention is 0 ° of vectogram.
Figure 11 is that the first winding phase shift angle of phase-shifting rectifier transformer 2 of first embodiment of the invention is -12 ° of vector
Figure.
Figure 12 is that the first winding phase shift angle of phase-shifting rectifier transformer 2 of first embodiment of the invention is -24 ° of vector
Figure.
Figure 13 is the structural representation of secondary winding in first embodiment of the invention.
Figure 14 is the operating diagram of assists winding in first embodiment of the invention.
Embodiment
Below in conjunction with the accompanying drawings and embodiment the invention will be further described.
First embodiment
Referring to Fig. 1-Figure 14, many pulse wave resin-cast phase-shifting commutation transformation systems of Large Copacity of this bank electricity include respectively with
Two phase-shifting rectifier transformers (m takes 2) of rectification unit docking, two phase-shifting rectifier transformers dock to form 60 with rectification unit
(n takes 60) pulse wave rectifier；Each phase-shifting rectifier transformer uses primary side and secondary side phase shift simultaneously, wherein, a phase-shifting commutation
The primary side phase shift angle of transformer is+3 ° (+180/n °), the primary side phase shift angle of another phase-shifting rectifier transformer for-
3°(-180/n°)；Secondary side phase shift angle all same, be (0 °, ± 720/n °, ± 1440/n ° ...) or (± 360/n °,
± 1080/n °, ± 1800/n ° ...), i.e., the connection group of wherein one phase-shifting rectifier transformer for D (+180/n °) d (0 °,
± 720/n °, ± 1440/n ° ...), the connection group of another phase-shifting rectifier transformer is D (- 180/n °) d (0 °, ± 720/
N °, ± 1440/n ° ...), or wherein one phase-shifting rectifier transformer connection group for D (+180/n °) d (± 360/n °,
± 1080/n °, ± 1800/n ° ...), the connection group of another phase-shifting rectifier transformer is D (- 180/n °) d (± 360/
N °, ± 1080/n °, ± 1800/n ° ...)；The secondary side of each phase-shifting rectifier transformer is individual big around component per 3 (m takes 3) are mutually divided into
Not Dui Ying frequency converter output U, V, W phase, each big winding has the individual small windings of 5 (n/2md=5), 5 (n/2md=5) produced respectively
The magnetic flux of group out of phase, the secondary side of each phase-shifting rectifier transformer exports the voltage of 10 (n/md=10) individual angles altogether, each
6 ° (360/n °=6 °) are differed between angle.Wherein, the performance parameter of phase-shifting rectifier transformer meets following condition：1) it is each secondary
Side idle voltage output tolerance is -1.5~+2.5%；2) output voltage degree of unbalancedness is not more than 2%；3) phase shift angle is missed
Difference is within ± 0.8 °.
Furtherly, due to the equal phase shift of first winding and secondary winding of phase-shifting rectifier transformer, primary side and secondary side
Cooperated on output voltage and output angle, scope control can be will deviate to minimum.Conventional phase-shifting transformer is only two
Secondary phase shift, phase shift angle is more and can not meet the voltage of all outputs and the precision of angle.The present embodiment is by taking 60 pulse waves as an example：Pass
The phase shift of system becomes the phase-shifting rectifier transformer that way is two 30 pulse waves, wherein the secondary phase shift of 1 phase-shifting rectifier transformer be-
21 °, -9 °, 3 °, 15 °, 27 °, the secondary phase shift of another phase-shifting rectifier transformer is -27 °, -15 °, -3 °, 9 °, 21 °, i.e., every
The corresponding phase shift angle of platform has 5；And one or two equal phase shift systems of the present invention are used, two phase-shifting rectifier transformers are secondary
Side phase shift angle is 0 °, ± 12 °, ± 24 °, because positive-angle can be adjusted with negative angle by changing winding external connection mode
It is whole, therefore actually only need to meet the phase shift angle of 12 °, 24 ° two angles, find the probability of suitable number of turns combination significantly
Lifting；Wherein, primary side is due to voltage height, and the number of turn is more, and the number of turn combination for meeting 3 ° of phase shifts is also easily found.
Furtherly, it is the balance of ampere-turn above and below each winding of guarantee, each small winding presses phase shift angle from big to small successively
It is arranged to make up one big winding；Major windings are arranged in order one phase coil of composition by upper, middle and lower.
Furtherly, traditional structure needs to be connected to the outlet cable of user due to outlet nut, and remaining nut needs logical
Connecting line interconnection is crossed, therefore outlet structure is intricate, the phase-shifting rectifier transformer of this structure is provided with boss, boss one
Side concentrated setting tap nut, the non-tap nut of boss opposite side concentrated setting, so as to facilitate user discrimination and wiring.
Furtherly, because phase-shifting rectifier transformer is placed on 1 container together with other parts such as the frequency converter of user
Interior, container is placed out of doors, and degree of protection is high, and area of dissipation is small；And space is limited in case, it is highly detrimental to transformer and dissipates
Heat, very high request is proposed to phase-shifting rectifier transformer operational reliability, it is seen that the design of phase-shifting rectifier transformer aeration structure
It is just very crucial, furthermore, it is contemplated that transformer when being charged to ship, it is necessary to often put into power network；Referring to Figure 14, therefore, moving
Assists winding and cooling fan are provided with commutating phase transformer, assists winding is used for pre-magnetizing in advance and supplied for cooling fan
Electricity；When phase-shifting rectifier transformer starts, assists winding shifts to an earlier date pre-magnetizing to reduce the excitation surge current (figure of phase-shifting rectifier transformer
Dotted line direction in 14 represents the sense of current before first winding energization first to pre-magnetizing unshakable in one's determination), so as to reduce the dirt to power network
Dye；After phase-shifting rectifier transformer is successfully started up, assists winding serves as the power supply of cooling fan, and (the solid line direction in Figure 14 is represented
The sense of current that fan is powered after first winding is powered), powered to cooling fan, temperature rise during reduction transformer station high-voltage side bus is carried
The operational reliability of high transformer.
Concrete operating principle：
Illustrate by taking 60 pulse waves as an example, pre-magnetizing winding is wound on iron core, in order to ensure pre-magnetizing winding and main winding
Phase is consistent, and pre-magnetizing winding also band phase shift, phase shift angle is consistent with main winding.First winding is placed on the outside of iron core, is moved
Phase winding tap is drawn from end turn, and secondary winding is placed in the outside of first winding, is divided into 15 small windings, outlet passes through convex
Platform nut is drawn.
Referring to Fig. 1-Figure 12, two+3 ° and-3 ° of phase-shifting rectifier transformer primary sides difference phase shifts, secondary side phase shift is 0 °,
±12°、±24°。
What following table was provided is a various secondary sides and combination and the parameter index of the assists winding number of turn.
Table 1
Table 2
Table 3
It is similar, when two+2.5 ° of phase shifts of phase-shifting rectifier transformer primary sides difference, -2.5 °, secondary side phase shift for ±
At 5 °, ± 15 °, ± 25 °, output angle is respectively：Phase-shifting rectifier transformer 1：(- 22.5 °, -12.5 °, -2.5 °, 27.5 °,
17.5 °, 7.5 °)；Phase-shifting rectifier transformer 2：(- 27.5 °, -17.5 °, -7.5 °, 22.5 °, 12.5 °, 2.5 °), i.e. phase-shifting commutation
The connection group of transformer 1 is D (+2.5 °) d (- 22.5 °, -12.5 °, -2.5 °, 27.5 °, 17.5 °, 7.5 °), and phase-shifting commutation becomes
The connection group of depressor 2 is D (- 2.5 °) d (- 27.5 °, -17.5 °, -7.5 °, 22.5 °, 12.5 °, 2.5 °), the output of secondary side
Angle has 12, it is each between differ 5 °, therefore form the output of 72 pulse waves in 360 ° of a cycle.
Second embodiment
This bank electricity many pulse wave resin-cast phase-shifting commutation transformation systems of Large Copacity are different from being in place of first embodiment：
Phase-shifting rectifier transformer sets two, and each phase-shifting rectifier transformer docks to form 72 pulse wave rectifiers with rectification unit；Each phase shift is whole
The secondary side of convertor transformer is divided into 3 big winding, and each big winding is divided into 6 small windings, and produces the magnetic of 6 groups of outs of phase
It is logical, the secondary side of two phase-shifting rectifier transformers is exported altogether and 5 ° are differed between the voltage of 12 angles, each angle.
Other not described same first embodiments in part, are no longer elaborated here.
The above-mentioned preferred scheme for the present invention, has been shown and described general principle, principal character and the present invention of the present invention
Advantage.Those skilled in the art should be recognized that the present invention is not limited to the above embodiments, above-described embodiment and specification
Described in merely illustrate the principles of the invention, without departing from the spirit and scope of the present invention the present invention also have it is various
Changes and improvements, these changes and improvements all fall within the protetion scope of the claimed invention.The claimed scope of the invention is by institute
Attached claims and its equivalent are defined.
Claims (8)
1. a kind of many pulse wave resin-cast phase-shifting commutation transformation systems of Large Copacity, including the phase-shifting commutation docked with rectification unit become
Depressor；It is characterized in that：The phase-shifting rectifier transformer sets m platforms, and each phase-shifting rectifier transformer docks to form n with rectification unit
Pulse wave rectifier；Each phase-shifting rectifier transformer is using primary side and secondary side phase shift simultaneously, the wherein mutual not phase of primary side phase shift angle
Together, secondary side phase shift angle all same；Secondary side is divided into d big winding, and each big winding has n/2md small windings, produced respectively
The magnetic flux of raw n/2md group outs of phase, the secondary side of each phase-shifting rectifier transformer exports the voltage of n/md angle, each angle altogether
360/n ° is differed between degree, n, m and d are respectively natural number, and n >=48.
2. many pulse wave resin-cast phase-shifting commutation transformation systems of Large Copacity according to claim 1, it is characterised in that：At least
The primary side phase shift angle of one phase-shifting rectifier transformer is+180/n °, the primary side of at least one phase-shifting rectifier transformer
Phase shift angle is -180/n °.
3. many pulse wave resin-cast phase-shifting commutation transformation systems of Large Copacity according to claim 2, it is characterised in that：Each phase shift
The secondary side phase shift angle of rectifier transformer is is ± 720i/n ° or ± 360i/n °, and i is natural number.
4. many pulse wave resin-cast phase-shifting commutation transformation systems of Large Copacity according to claim 3, it is characterised in that：It is each it is small around
Group is arranged in order the one big winding of composition by phase shift angle from big to small；Major windings are arranged in order one phase line of composition by upper, middle and lower
Circle.
5. many pulse wave resin-cast phase-shifting commutation transformation systems of Large Copacity according to claim 4, it is characterised in that：It is described to move
Commutating phase transformer is provided with boss, and boss side is provided with tap nut, and boss opposite side is provided with non-tap nut.
6. many pulse wave resin-cast phase-shifting commutation transformation systems of Large Copacity according to claim 5, it is characterised in that：It is described to move
Assists winding and cooling fan are provided with commutating phase transformer, assists winding is used for pre-magnetizing in advance and supplied for cooling fan
Electricity.
7. according to many pulse wave resin-cast phase-shifting commutation transformation systems of any one of the claim 1-6 Large Copacities, its feature exists
In：The phase-shifting rectifier transformer sets two, and each phase-shifting rectifier transformer docks to form 60 pulse wave rectifiers with rectification unit；Respectively
The secondary side of phase-shifting rectifier transformer is divided into 3 big winding, and each big winding is divided into 5 small windings, and produces 5 groups of outs of phase
Magnetic flux, make the secondary side of two phase-shifting rectifier transformers export altogether between the voltage of 10 angles, each angle differ 6 °.
8. according to many pulse wave resin-cast phase-shifting commutation transformation systems of any one of the claim 1-6 Large Copacities, its feature exists
In：The phase-shifting rectifier transformer sets two, and each phase-shifting rectifier transformer docks to form 72 pulse wave rectifiers with rectification unit；Respectively
The secondary side of phase-shifting rectifier transformer is divided into 3 big winding, and each big winding is divided into 6 small windings, and produces 6 groups of outs of phase
Magnetic flux, make the secondary side of two phase-shifting rectifier transformers export altogether between the voltage of 12 angles, each angle differ 5 °.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4002663A1 (en) * | 2020-11-24 | 2022-05-25 | Delta Electronics (Shanghai) Co., Ltd | Design method of transformer |
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| US20100073970A1 (en) * | 2008-09-24 | 2010-03-25 | Mehdi Abolhassani | Modular multi-pulse transformer rectifier for use in symmetric Multi-level power converter |
| CN201682423U (en) * | 2010-03-29 | 2010-12-22 | 北京利德华福电气技术有限公司 | Resonant-type precharge circuit for high-voltage frequency converter |
| CN102945735A (en) * | 2012-11-06 | 2013-02-27 | 保定天威集团有限公司 | Pre-magnetizing transformer with voltage regulator and manufacture method thereof |
| CN104766707A (en) * | 2015-03-27 | 2015-07-08 | 顺特电气设备有限公司 | Winding structure of single rectifier transformer |
| CN105609275A (en) * | 2016-01-13 | 2016-05-25 | 苏州吴变电气科技有限公司 | 54 pulse wave phase shift rectifier transformer |
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2017
- 2017-07-25 CN CN201710612299.XA patent/CN107257200A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100073970A1 (en) * | 2008-09-24 | 2010-03-25 | Mehdi Abolhassani | Modular multi-pulse transformer rectifier for use in symmetric Multi-level power converter |
| CN201682423U (en) * | 2010-03-29 | 2010-12-22 | 北京利德华福电气技术有限公司 | Resonant-type precharge circuit for high-voltage frequency converter |
| CN102945735A (en) * | 2012-11-06 | 2013-02-27 | 保定天威集团有限公司 | Pre-magnetizing transformer with voltage regulator and manufacture method thereof |
| CN104766707A (en) * | 2015-03-27 | 2015-07-08 | 顺特电气设备有限公司 | Winding structure of single rectifier transformer |
| CN105609275A (en) * | 2016-01-13 | 2016-05-25 | 苏州吴变电气科技有限公司 | 54 pulse wave phase shift rectifier transformer |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4002663A1 (en) * | 2020-11-24 | 2022-05-25 | Delta Electronics (Shanghai) Co., Ltd | Design method of transformer |
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