CN202872682U - Diode clamped hybrid cascade bridge type frequency converter - Google Patents
Diode clamped hybrid cascade bridge type frequency converter Download PDFInfo
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- CN202872682U CN202872682U CN 201220483733 CN201220483733U CN202872682U CN 202872682 U CN202872682 U CN 202872682U CN 201220483733 CN201220483733 CN 201220483733 CN 201220483733 U CN201220483733 U CN 201220483733U CN 202872682 U CN202872682 U CN 202872682U
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Abstract
The utility model discloses a diode clamped hybrid cascade bridge type frequency converter, which comprises a three-level output frequency converter unit and a five-level output frequency converter unit. The three-level output frequency converter unit consists of four controllable switches. The five-level output frequency converter unit consists of eight controllable switches and four diodes. A cascade structure is formed between the three-level output frequency converter unit and the five-level output frequency converter unit. Two output power supplies, which are respectively an output power supply of the three-level output frequency converter unit and an output power supply of the five-level output frequency converter unit, are provided, wherein both ends of the output power supply and both ends of the other output power supply are respectively connected to nodes of the three-level output frequency converter unit and nodes of the five-level output frequency converter unit. The frequency converter, through control of the twelve controllable switches, realizes output of multiple different levels respectively, thereby completing frequency conversion processing of an alternating current power supply; the frequency converter needs few components, is easy to modularized, and is suitable for serving as a frequency converter of a power grid interface.
Description
Technical field
The utility model relates to a kind of frequency converter, relates in particular to a kind of diode-clamped Mixed cascading bridge-type frequency converter that is easy to realize modular construction.
Background technology
Depth development along with modern industry, the application of high-power current converting device in national economy is more and more extensive, such as large-capacity transducer, high-power electric active filter, static passive compensation device, MW level wind-powered electricity generation unit with current transformer etc., and for the high-power converter occasion, often exist contradiction between the power handling capability of high-power switch device and the switching frequency, the larger switching frequency of power is lower usually.Because the restriction of switching frequency is difficult to use the performance that the PWM technology is improved the large capacity current transformer of tradition.Therefore, in the high-power converter occasion, people often wish that high-power, high voltage bearing power electronic equipment can be operated under the high as far as possible switching frequency, in order to improve the quality of output waveform.
Common inverter is also referred to as two level converters usually, this topological structure is fairly simple, high-power in order to obtain, the general switching device that relies on connects to bear high pressure, bearing large electric current, but because the discreteness of power device parameter, this will bring the series of problems such as quiet, dynamic voltage balancing and current-sharing with the switching device parallel connection, technical uncertain factor impact is very large, and reliability is not high; But because output only has two level, voltage fluctuation is large, produces larger harmonic wave.Therefore this structure applications scope is very limited.
Summary of the invention
The purpose of this utility model provides a kind of diode-clamped Mixed cascading bridge-type frequency converter that is easy to realize modular construction with regard to being in order to address the above problem.
The utility model is achieved through the following technical solutions above-mentioned purpose:
Diode-clamped Mixed cascading bridge-type frequency converter described in the utility model comprises three level output frequency converter unit and five level output frequency converter unit, described three level output frequency converter unit is made of four gate-controlled switches, four described gate-controlled switches are the first gate-controlled switch, the second gate-controlled switch, the 3rd gate-controlled switch and the 4th gate-controlled switch, described five level output frequency converter unit is made of eight gate-controlled switches and four diodes, eight described gate-controlled switches are the 5th gate-controlled switch, the 6th gate-controlled switch, the 7th gate-controlled switch, the 8th gate-controlled switch, the 9th gate-controlled switch, the tenth gate-controlled switch, the 11 gate-controlled switch and the 12 gate-controlled switch, four described diodes are the first diode, the second diode, the 3rd diode and the 4th diode; The first end of described the first gate-controlled switch, the second end of described the 3rd gate-controlled switch, the second end of the first end of described the 8th gate-controlled switch and described the tenth gate-controlled switch interconnects, the second end of described the 8th gate-controlled switch, the negative pole of the first end of described the 6th gate-controlled switch and described the 3rd diode interconnects, the first end of described the tenth gate-controlled switch, the second end of described the 12 gate-controlled switch and the positive pole of described the 4th diode interconnect, the second end of described the 7th gate-controlled switch, the negative pole of the first end of described the 5th gate-controlled switch and described the first diode interconnects, the first end of described the 9th gate-controlled switch, the second end of described the 11 gate-controlled switch and the positive pole of described the second diode interconnect, the positive pole of described the first diode, the negative pole of described the second diode, the negative pole of the positive pole of described the 3rd diode and described the 4th diode interconnects; The first end of described the second gate-controlled switch be connected the second end of the 4th gate-controlled switch and all be connected with the first end of input power, the first end of described the 7th gate-controlled switch be connected the second end of the 9th gate-controlled switch and all be connected with the second end of described input power, the second end of described the first gate-controlled switch and the second end of described the second gate-controlled switch all are connected with the first end of the out-put supply of described three level output frequency converter unit, the first end of the first end of described the 3rd gate-controlled switch and described the 4th gate-controlled switch all is connected with the second end of the out-put supply of described three level output frequency converter unit, the second end of described the 5th gate-controlled switch and the second end of described the 6th gate-controlled switch all are connected with the first end of the out-put supply of described five level output frequency converter unit, and the first end of described the 11 gate-controlled switch and the first end of described the 12 gate-controlled switch all are connected with the second end that described five level are exported the out-put supply of frequency converter unit.
Particularly, described gate-controlled switch comprises a triode and a diode, the emitter of described triode is connected with the positive pole of described diode, the collector electrode of described triode is connected with the negative pole of described diode, the first end of the very described gate-controlled switch of the emission of described triode, the second end of the very described gate-controlled switch of the current collection of described triode, the base stage of described triode are the control input end of described gate-controlled switch.
The beneficial effects of the utility model are:
The utility model realizes respectively the output of multiple varying level, thereby finishes the frequency-conversion processing to AC power by to the control of 12 gate-controlled switches, have required device quantity few, be easy to modular advantage, be suitable as the frequency converter of electrical network interface; Respectively the selection of redundant state is kept balance by four diodes simultaneously, form the clamp control to output voltage.
Description of drawings
Fig. 1 is the electrical block diagram of diode-clamped Mixed cascading bridge-type frequency converter described in the utility model.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing:
As shown in Figure 1, diode-clamped Mixed cascading bridge-type frequency converter described in the utility model comprises three level output frequency converter unit and five level output frequency converter unit, described three level output frequency converter unit is made of four gate-controlled switches, four described gate-controlled switches are the first controllable switch S 1, the second controllable switch S 2, the 3rd controllable switch S 3 and the 4th controllable switch S 4, described five level output frequency converter unit is made of eight gate-controlled switches and four diodes, eight described gate-controlled switches are the 5th controllable switch S 5, the 6th controllable switch S 6, the 7th controllable switch S 7, the 8th controllable switch S 8, the 9th controllable switch S 9, the tenth controllable switch S 10, the 11 controllable switch S 11 and 12, four described diodes of the 12 controllable switch S are the first diode D1, the second diode D2, the 3rd diode D3 and the 4th diode D4; The first end of the first controllable switch S 1, the second end of the 3rd controllable switch S 3, the second end of the first end of the 8th controllable switch S 8 and the tenth controllable switch S 10 interconnects, the second end of the 8th controllable switch S 8, the negative pole of the first end of the 6th controllable switch S 6 and the 3rd diode D3 interconnects, the first end of the tenth controllable switch S 10, the second end of the 12 controllable switch S 12 and the positive pole of the 4th diode D4 interconnect, the second end of the 7th controllable switch S 7, the negative pole of the first end of the 5th controllable switch S 5 and the first diode D1 interconnects, the first end of the 9th controllable switch S 9, the second end of the 11 controllable switch S 11 and the positive pole of the second diode D2 interconnect, the positive pole of the first diode D1, the negative pole of the second diode D2, the negative pole of the positive pole of the 3rd diode D3 and the 4th diode D4 interconnects; The second end of the first end of the second controllable switch S 2 and the 4th controllable switch S 4 all is connected with the first end of input power Vin, the second end of the first end of the 7th controllable switch S 7 and the 9th controllable switch S 9 all is connected with the second end of input power Vin, the second end of the second end of the first controllable switch S 1 and the second controllable switch S 2 all is connected with the first end of the out-put supply Vout1 of described three level output frequency converter unit, the first end of the first end of the 3rd controllable switch S 3 and the 4th controllable switch S 4 all is connected with the second end of the out-put supply Vout1 of described three level output frequency converter unit, the second end of the second end of the 5th controllable switch S 5 and the 6th controllable switch S 6 all is connected with the first end of the out-put supply Vout2 of described five level output frequency converter unit, and the first end of the 11 controllable switch S 11 and the first end of the 12 controllable switch S 12 all are connected with the second end that described five level are exported the out-put supply Vout2 of frequency converter unit.
As shown in Figure 1, gate-controlled switch comprises a triode and a diode, the emitter of triode is connected with the positive pole of diode, the collector electrode of triode is connected with the negative pole of diode, the emission of triode is the first end of gate-controlled switch very, the current collection of triode is the second end of gate-controlled switch very, and the base stage of triode is the control input end of gate-controlled switch.The structure of above-mentioned gate-controlled switch is conventional structure, so the symbol of mark triode and diode in the drawings not.
By the control to the base signal of each gate-controlled switch, realize the open and close state of each gate-controlled switch, thereby the output varying level is combined as the power supply of different frequency again by these level.Any time, the out-put supply Vout of each three level output frequency converter unit is+E ,-one of E and zero level, so be called the output of three level; The out-put supply Vout of each five level output frequency converter unit is+2E ,+E ,-E ,-one of 2E and zero level, so be called the output of five level.Whole diode-clamped Mixed cascading bridge-type frequency converter comprises three level output frequency converter unit and five a level output frequency converter unit, can carry out the series and parallel combination, thereby realizes the more power supply output of multivoltage and frequency.
Claims (2)
1. diode-clamped Mixed cascading bridge-type frequency converter, it is characterized in that: comprise three level output frequency converter unit and five level output frequency converter unit, described three level output frequency converter unit is made of four gate-controlled switches, four described gate-controlled switches are the first gate-controlled switch, the second gate-controlled switch, the 3rd gate-controlled switch and the 4th gate-controlled switch, described five level output frequency converter unit is made of eight gate-controlled switches and four diodes, eight described gate-controlled switches are the 5th gate-controlled switch, the 6th gate-controlled switch, the 7th gate-controlled switch, the 8th gate-controlled switch, the 9th gate-controlled switch, the tenth gate-controlled switch, the 11 gate-controlled switch and the 12 gate-controlled switch, four described diodes are the first diode, the second diode, the 3rd diode and the 4th diode; The first end of described the first gate-controlled switch, the second end of described the 3rd gate-controlled switch, the second end of the first end of described the 8th gate-controlled switch and described the tenth gate-controlled switch interconnects, the second end of described the 8th gate-controlled switch, the negative pole of the first end of described the 6th gate-controlled switch and described the 3rd diode interconnects, the first end of described the tenth gate-controlled switch, the second end of described the 12 gate-controlled switch and the positive pole of described the 4th diode interconnect, the second end of described the 7th gate-controlled switch, the negative pole of the first end of described the 5th gate-controlled switch and described the first diode interconnects, the first end of described the 9th gate-controlled switch, the second end of described the 11 gate-controlled switch and the positive pole of described the second diode interconnect, the positive pole of described the first diode, the negative pole of described the second diode, the negative pole of the positive pole of described the 3rd diode and described the 4th diode interconnects; The first end of described the second gate-controlled switch be connected the second end of the 4th gate-controlled switch and all be connected with the first end of input power, the first end of described the 7th gate-controlled switch be connected the second end of the 9th gate-controlled switch and all be connected with the second end of described input power, the second end of described the first gate-controlled switch and the second end of described the second gate-controlled switch all are connected with the first end of the out-put supply of described three level output frequency converter unit, the first end of the first end of described the 3rd gate-controlled switch and described the 4th gate-controlled switch all is connected with the second end of the out-put supply of described three level output frequency converter unit, the second end of described the 5th gate-controlled switch and the second end of described the 6th gate-controlled switch all are connected with the first end of the out-put supply of described five level output frequency converter unit, and the first end of described the 11 gate-controlled switch and the first end of described the 12 gate-controlled switch all are connected with the second end that described five level are exported the out-put supply of frequency converter unit.
2. diode-clamped Mixed cascading bridge-type frequency converter according to claim 1, it is characterized in that: described gate-controlled switch comprises a triode and a diode, the emitter of described triode is connected with the positive pole of described diode, the collector electrode of described triode is connected with the negative pole of described diode, the first end of the very described gate-controlled switch of the emission of described triode, the second end of the very described gate-controlled switch of the current collection of described triode, the base stage of described triode are the control input end of described gate-controlled switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220483733 CN202872682U (en) | 2012-09-21 | 2012-09-21 | Diode clamped hybrid cascade bridge type frequency converter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201220483733 CN202872682U (en) | 2012-09-21 | 2012-09-21 | Diode clamped hybrid cascade bridge type frequency converter |
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| CN202872682U true CN202872682U (en) | 2013-04-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103684011A (en) * | 2012-09-21 | 2014-03-26 | 成都市思博睿科技有限公司 | Diode clamping type hybrid cascaded bridge type frequency converter |
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- 2012-09-21 CN CN 201220483733 patent/CN202872682U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103684011A (en) * | 2012-09-21 | 2014-03-26 | 成都市思博睿科技有限公司 | Diode clamping type hybrid cascaded bridge type frequency converter |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130410 Termination date: 20130921 |