CN202840962U - 1500V input-110V output dc power supply - Google Patents
1500V input-110V output dc power supply Download PDFInfo
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- CN202840962U CN202840962U CN 201220124335 CN201220124335U CN202840962U CN 202840962 U CN202840962 U CN 202840962U CN 201220124335 CN201220124335 CN 201220124335 CN 201220124335 U CN201220124335 U CN 201220124335U CN 202840962 U CN202840962 U CN 202840962U
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Abstract
The utility model discloses a 1500V input-110V output dc power supply, which comprises a bleeder circuit, a switching circuit, a rectification circuit and a filter circuit. The output end of the bleeder circuit is connected with the input end of filter circuit via the switching circuit and the rectification circuit; two ends of the bleeder circuit are respectively connected with an anode and a cathode of the power supply, and two ends of the switching circuit are respectively connected with the anode and the cathode of the power supply; two step down transformers are connected in series in the rectification circuit, two ends of the rectification circuit are connected with the output end of the switching circuit, and two full-wave rectifiers are connected in parallel in a back end of the rectification circuit; and the filter circuit is a capacitor filtering circuit, wherein two ends of the filter circuit are respectively connected with two output ends of the rectifiers. The dc power supply of the utility model has the advantages of high input voltage level, stable dc voltage output, simple circuit structure, small switch stress, simplified transformer design, high utilization rate of the power supply, good power supply quality, high stability and safety factor, and low cost, which is suitable for high-voltage high-speed application occasions including subways, multiple units and high-speed railways.
Description
Technical field
The utility model relates to a kind of DC power supply of electric and electronic technical field, specifically a kind of DC power supply of airborne tri-level inversion of 1500V input-110V output.
Background technology
The 110V low-voltage dc power supply that is applied to airborne low voltage equipment is the important component part of subway motor-car high ferro low-voltage distribution system.Along with the fast development of China's subway motor-car high ferro, more and more vigorous for the demand of low-voltage dc power supply, require also more and more higher.Volume is little, lightweight, good stability, coefficient of safety are high, the low-tension supply of extra-high pressure input meets the demand for development of subway motor-car high ferro, has a good application prospect.
The DC power supply of tri-level inversion specifically comprises two voltage transformation links, and one is high voltage direct current input-low-voltage AC output element, and another is low-voltage AC input-low-voltage DC output element.
In order to finish high voltage direct current input-low-voltage AC output element, can adopt single-end ortho-exciting circuit and bridge inverter main circuit.The single-end ortho-exciting circuit is transformed to high-voltage pulse with the high-voltage dc voltage copped wave of input, and this voltage is sent into step-down transformer and is coupled to secondary, and circuit structure is simple, control easily, cost is lower, but the electric pressure that single power device bears is larger, and the power utilization rate is lower; The bridge inverter main circuit structure is classical, and control method is ripe, and multiple functional, performance is high, but its cost is higher, and lower grade of input voltage, can't be applied to the occasion of high-power.
Through the existing retrieval that is fit to the buck converter technology of high-voltage dc voltage input-low-voltage dc voltage output application scenario is found, " design of high voltage input and low-voltage large current output module power supply " (power electronic technology, the 5th phases 43 volume in 2009) and " high voltage input and low-voltage multichannel output Two-stage converter " (electrotechnics journal, the 1st phase the 25th volume in 2010) describe in single-phase-complex structure of blow-up-DC converter, design difficulty is large, input voltage is low, function and poor-performing are difficult to be applied to the high-voltage fields such as airborne direct current and close; China Patent No.: 02224999.0, patent name: obtain the low-tension supply of energy from high-voltage line, the buck converter of description has adopted current transformer and storage battery, and cost is higher, and its topological sum operation principle is all extremely complicated, uses difficulty very high.
In order to finish the output of low-voltage ac voltage input-low-voltage dc voltage, adopt full-wave rectifying circuit, the power utilization rate is high, and each power device only provides half of output current, and output DC stream wave amplitude is little, and power supply quality is high.
In sum, the input voltage grade of existing high input voltage-low pressure out-put supply is low, structure and control more complicated, and the higher power supply cost of input voltage is high, the topology more complicated, output voltage stability is relatively poor, all is not suitable for airborne direct current etc. at a high speed and the occasion of high pressure.Along with the expansion of application in practice, design a kind of simple in structure, task of top priority that buck converter that control is easy, with low cost, the input voltage grade is high, power supply quality is high has become those skilled in the art.
The utility model content
The utility model provides a kind of DC power supply of 1500V input-110V output for the above-mentioned deficiency of prior art, achieves the DC/DC conversion, has simple in structure, easy, with low cost, the power supply quality advantages of higher of control.
The utility model is achieved through the following technical solutions, and the utility model comprises: bleeder circuit, switching circuit, rectification circuit and filter circuit, and wherein: the output of bleeder circuit links to each other with the input of filter circuit with rectification circuit by switching circuit; Described bleeder circuit is the capacitance partial pressure circuit: four electrochemical capacitors are connected successively, these four electric capacity are divided into two groups, supply voltage is divided into impartial two parts, wherein the tie point of the second electric capacity and the 3rd electric capacity is Section Point, the tie point of the first electric capacity and the second electric capacity is first node, and the tie point of the 3rd electric capacity and the 4th electric capacity is the 3rd node; Each electric capacity grading resistor all in parallel, first to fourth resistance is respectively first to fourth capacitor voltage equalizing; The 5th resistance and the series connection of the 6th resistance, two ends link to each other with Section Point with input power is anodal respectively, are the first electric capacity and the second capacitor voltage equalizing; The 7th resistance and the series connection of the 8th resistance, two ends link to each other with the input power negative pole with Section Point respectively, are the 3rd electric capacity and the 4th capacitor voltage equalizing; The structure of described switching circuit is that four contrary switches of leading are connected, two ends link to each other with negative pole with input power is anodal respectively, wherein the second contrary switch and the 3rd of leading is the 4th node against the tie point of leading switch, first contrary lead switch and be connected the contrary switch of leading connect, the 3rd contrary switch of leading connects with the 4th contrary switch of leading; Described contrary gate pole of leading switch is accepted the pwm pulse control signal, so that four contrary three grades of level AC-AC voltages of switch output of leading; Described rectification circuit comprises the sub-rectification circuit of two input series connection-outputs parallel connection, every sub-rectification circuit specifically comprises: step-down transformer and full-wave rectifier, described step-down transformer has a former limit winding and two secondary windings, wherein two secondary windings divide with upper and lower region, and link to each other with full-wave rectifier, the former limit windings in series of two step-down transformers, two ends link to each other with Section Point with the 4th node respectively.
Contrary lead switch and be provided with five on off states, be respectively for described four: 1. first contraryly lead switch and the second contrary switch of leading is open-minded simultaneously, the 3rd contraryly leads switch and the 4th contrary switch of leading turn-offs; 2. second contrary lead switch and the 3rd contrary switch of leading is open-minded simultaneously, the first contrary switch and the 4th of leading is contraryly led switch and is turn-offed simultaneously; 3. the 3rd contrary lead switch and the 4th contrary switch of leading is open-minded, the first contrary switch and second of leading is contraryly led switch and is turn-offed simultaneously; 4. second contrary lead switch and the 3rd contrary switch of leading is open-minded, the first contrary switch and the 4th of leading is contraryly led switch and is turn-offed simultaneously; 5. synchronization can only have two switch conductions, and first can not be open-minded simultaneously against leading switch against leading switch and the 4th; So three grades of level AC-AC voltages are exported in circulation.
The circuit structure of described sub-rectification circuit is identical, concrete method of attachment: the positive pole of the first diode links to each other with the positive pole of the upper secondary winding of the first step-down transformer, negative pole links to each other with out-put supply is anodal, the positive pole of the second diode links to each other with the negative pole of the upper secondary winding of the first step-down transformer, negative pole links to each other with out-put supply is anodal, one end of the first inductance links to each other with the centre cap of the secondary winding of the first step-down transformer, and an other end links to each other with the out-put supply negative pole; The negative pole of first, second, third, fourth diode links to each other with out-put supply is anodal, and the right-hand member of the first to second inductance links to each other with the out-put supply negative pole.
Described filter circuit is capacitor filter, the 5th electric capacity and the 6th capacitances in series, two ends are connected with the out-put supply negative pole with out-put supply is anodal respectively, the 5th electric capacity two ends the 9th resistance in parallel wherein, the 6th electric capacity two ends the tenth resistance in parallel, the 9th resistance and the tenth resistance are respectively the 5th electric capacity and the 6th capacitor voltage equalizing.
Adopt technique scheme, the utility model is converted to low-voltage in conjunction with bleeder circuit and switching circuit with high voltage and processes, the transformer series connection reduces the pressure drop of single transformer, formulated the buck converter of high input voltage-low pressure output, bleeder circuit and switching circuit are simple in structure, control is convenient, the high input voltage step-down can be processed, switch stress is little, design of transformer is simplified, and full-wave rectifier power utilization rate is high, and output voltage stability is good, coefficient of safety is high, can adapt to the high-speed high-tension application scenarios such as subway motor-car high ferro.The utlity model has project organization novelty, highly versatile, low cost and other advantages.
Description of drawings
Fig. 1 is the circuit theory diagrams of the utility model embodiment.
Embodiment
The below elaborates to embodiment of the present utility model, and the present embodiment is implemented as prerequisite take technical solutions of the utility model, provided detailed execution mode and concrete operating process, but protection range of the present utility model is not limited to following embodiment.
As shown in Figure 1, the present embodiment provides a kind of DC power supply of 1500V input-110V output, the bleeder circuit 1, switching circuit 2, rectification circuit 3 and the filter circuit 4 that comprise successively cascade, the output of bleeder circuit 1 links to each other with the input of rectification circuit 3 with filter circuit 4 by switching circuit 2.
Described bleeder circuit 1 is the capacitance partial pressure circuit: four electrochemical capacitors are connected successively, these four electric capacity are divided into two groups, supply voltage is divided into impartial two parts, wherein the tie point of the second electric capacity and the 3rd electric capacity is Section Point O 2, the tie point of the first electric capacity and the second electric capacity is first node O1, and the tie point of the 3rd electric capacity and the 4th electric capacity is the 3rd node O3; Each electric capacity grading resistor all in parallel, first to fourth resistance is respectively first to fourth capacitor voltage equalizing; The 5th resistance and the series connection of the 6th resistance, two ends link to each other with Section Point O2 with input power is anodal respectively, are the first electric capacity and the second capacitor voltage equalizing; The 7th resistance and the series connection of the 8th resistance, two ends link to each other with the input power negative pole with Section Point O2 respectively, are the 3rd electric capacity and the 4th capacitor voltage equalizing.
Described electric capacity E1～E4 is electrochemical capacitor 450V/680uF.
Described resistance R 1～R8 is 50k Ω, 1%, 5W.
The structure of described switching circuit 2 is that 4 contrary switch S 1～S4 that lead connect, two ends connect with the anodal P1 of input power and negative pole N2 respectively, wherein the second contrary switch S 2 and the 3rd of leading is O4 against the tie point of leading switch S 3, the first contrary switch S 1 and second of leading is A against the tie point of leading switch S 2, and the 3rd contrary switch S 3 and the 4th of leading is B against the tie point of leading switch S 4.Described contrary gate pole of leading switch is accepted the pwm pulse control signal, so that four contrary three grades of level AC-AC voltages of switch output of leading, and so that four contrary orders that turn on and off of leading switch are: first contraryly leads switch and the second contrary switch of leading is open-minded simultaneously, and the 3rd contraryly leads switch and the 4th contrary switch of leading turn-offs; Second contrary leads switch and the 3rd contrary switch of leading is open-minded simultaneously, and the first contrary switch and the 4th of leading is contraryly led switch and turn-offed simultaneously; The 3rd contrary leads switch and the 4th contrary switch of leading is open-minded, and the first contrary switch and second of leading is contraryly led switch and turn-offed simultaneously; Second contrary leads switch and the 3rd contrary switch of leading is open-minded, and the first contrary switch and the 4th of leading is contraryly led switch and turn-offed simultaneously; Synchronization can only have two switch conductions, and first contrary lead switch and the 4th contrary lead switch can not be open-minded simultaneously, so three grades of level AC-AC voltages are exported in circulation.
Described is power MOSFET 1200V/75A/100 ℃ against leading switch S 1～S4, and contrary driving pulse of leading switch S 1～S4 is regulated according to the required output waveform of switching circuit, and switching frequency is 10kHz;
Described rectification circuit 3 is processed the input voltage of input power, the sub-rectification circuit that comprises the parallel connection of two input series connection-outputs, every sub-rectification circuit specifically comprises: step-down transformer and full-wave rectifier, described step-down transformer has a former limit winding and two secondary windings, wherein two secondary windings divide with upper and lower region, and link to each other with full-wave rectifier, the former limit windings in series of two step-down transformers, two ends link to each other with Section Point O2 with the 4th node O4 respectively.
The circuit structure of described sub-rectification circuit is identical, concrete method of attachment: the positive pole of the first diode links to each other with the positive pole of the upper secondary winding of the first step-down transformer, negative pole links to each other with out-put supply is anodal, the positive pole of the second diode links to each other with the negative pole of the upper secondary winding of the first step-down transformer, negative pole links to each other with out-put supply is anodal, one end of the first inductance links to each other with the centre cap of the secondary winding of the first step-down transformer, and an other end links to each other with the out-put supply negative pole; The negative pole of first, second, third, fourth diode links to each other with out-put supply is anodal, and the right-hand member of the first to second inductance links to each other with the out-put supply negative pole.
Described transformer T1, T2 are voltage-dropping type, and no-load voltage ratio is 2:1:1, adopt a plurality of primary to connect to promote voltage endurance capability.
Described diode FRD1～FRD4 is 600V/20A/100 ℃ on oppositely fast quick-recovery type, 5 parallel connections.
Described inductance L 1～L2 is amorphous material, and the sense value is 500uH.
Described resistance is that R25～R28 is 2.7k Ω, 1%, 1/10W.
Described filter circuit 4 is capacitor filter, the 5th electric capacity and the 6th capacitances in series, two ends are connected with the out-put supply negative pole with out-put supply is anodal respectively, the 5th electric capacity two ends the 9th resistance in parallel wherein, the 6th electric capacity two ends the tenth resistance in parallel, the 9th resistance and the tenth resistance are respectively the 5th electric capacity and the 6th capacitor voltage equalizing.The output output dc voltage of described filter circuit.
Described electric capacity E5, E6 are electrochemical capacitor 680 μ F/400V;
Described resistance R 9, R10 are 0.5k Ω, 5%, 1/2W.
In the present embodiment, input ac voltage is 1500V, and output dc voltage is 110V.
The present embodiment carries out work in the following manner: bleeder circuit 1 is inputted voltage averaged two five equilibriums up and down of being with high voltage direct current, grading resistor guarantees that two equal portions stabilized input voltage are balanced, switching circuit 2 is driven by specific pulse signal, input voltage is processed, high voltage direct current can be inputted voltage and become three grades of level AC-AC voltages that amplitude is input voltage 1/2nd sizes, greatly reduced switch stress, synchronization can only have two switch conductions, and first can not be open-minded simultaneously against leading switch against leading switch and the 4th, the total on off state of switching circuit 1: the first is contrary leads switch and the second contrary switch of leading is open-minded simultaneously, and the 3rd contraryly leads switch and the 4th contrary switch of leading turn-offs; On off state 2: the second is contrary leads switch and the 3rd contrary switch of leading is open-minded simultaneously, and the first contrary switch and the 4th of leading is contraryly led switch and turn-offed simultaneously; On off state 3: the three is contrary leads switch and the 4th contrary switch of leading is open-minded, and the first contrary switch and second of leading is contraryly led switch and turn-offed simultaneously.As example, when first contrary lead switch and second contrary when leading switch conduction output voltage be the 1/2nd, first electric capacity and second capacitances to supply power of input voltage; When second contrary lead switch and the 3rd contrary when leading switch conduction output voltage be 0; When the 3rd contrary lead switch and the 4th contrary when leading switch conduction output voltage be negative the 1/2nd, the 3rd electric capacity and the 4th capacitances to supply power of input voltage.For switching circuit, alternately equal duty ratio ground selection mode 1,2,3,2 produces suitable pulse control signal and drives respectively four against leading switch, can process sending into transformer after the high input voltage step-down.Three grades of level AC-AC voltages of switching circuit 2 outputs are sent into the step-down transformer of series connection, and are coupled to secondary, and like this, the single transformer input terminal voltage reduces, and has greatly simplified the design of transformer.Two step-down transformers output low-voltage ac voltage applies respectively full-wave rectifier separately, and full-wave rectifier carries out to low-voltage AC that rectification and output are in parallel to produce low-voltage, high-current output.
The utility model adopts capacitance partial pressure circuit and switching circuit, high input voltage is reduced to original 1/2nd to be processed, the further dividing potential drop of transformer cascaded structure, realization is transformed to low-voltage alternating current power supply by high-voltage DC power supply, adopt again full-wave rectifier to realize low-voltage ac voltage-low-voltage direct output, and output is in parallel, can obtain low-voltage, high-current output.This circuit structure is simple, novel in design, dexterously large voltage being converted into small voltage processes, switch stress reduces greatly, the design simplification of transformer, and cost descends, adopt full-wave rectifier to improve the power utilization rate, guaranteed power supply quality, the controller design is also also uncomplicated, has obtained simulation analysis and experiment preliminary identification.And the weak point of existing buck converter scheme comprises: the input voltage grade is too low, is difficult to accomplish high-power, and circuit stability is poor, and efficient is lower, and complex structure is controlled loaded down with trivial detailsly, be difficult for to realize.
Although content of the present utility model has been done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to restriction of the present utility model.After those skilled in the art have read foregoing, for multiple modification of the present utility model with to substitute all will be apparent.Therefore, protection range of the present utility model should be limited to the appended claims.
Claims (5)
1. the DC power supply of 1500V input-110V output comprises: bleeder circuit, switching circuit, rectification circuit and filter circuit, and wherein: the output of bleeder circuit links to each other with the input of filter circuit with rectification circuit by switching circuit; It is characterized in that:
Described bleeder circuit is the capacitance partial pressure circuit: four electrochemical capacitors are connected successively, these four electric capacity are divided into two groups, supply voltage is divided into impartial two parts, wherein the tie point of the second electric capacity and the 3rd electric capacity is Section Point (O2), the tie point of the first electric capacity and the second electric capacity is first node (O1), and the tie point of the 3rd electric capacity and the 4th electric capacity is the 3rd node (O3); Each electric capacity grading resistor all in parallel, first to fourth resistance is respectively first to fourth capacitor voltage equalizing; The 5th resistance and the series connection of the 6th resistance, two ends link to each other with Section Point (O2) with input power is anodal respectively, are the first electric capacity and the second capacitor voltage equalizing; The 7th resistance and the series connection of the 8th resistance, two ends link to each other with the input power negative pole with Section Point (O2) respectively, are the 3rd electric capacity and the 4th capacitor voltage equalizing;
The structure of described switching circuit is that four contrary switches of leading are connected, two ends link to each other with negative pole with input power is anodal respectively, wherein the second contrary switch and the 3rd of leading is the 4th node (O4) against the tie point of leading switch, first contrary lead switch and be connected the contrary switch of leading connect, the 3rd contrary switch of leading connects with the 4th contrary switch of leading; Described contrary gate pole of leading switch is accepted the pwm pulse control signal, so that four contrary three grades of level AC-AC voltages of switch output of leading;
Described rectification circuit comprises the sub-rectification circuit of two input series connection-outputs parallel connection, every sub-rectification circuit specifically comprises: step-down transformer and full-wave rectifier, described step-down transformer has a former limit winding and two secondary windings, wherein two secondary windings divide with upper and lower region, and link to each other with full-wave rectifier, the former limit windings in series of two step-down transformers, two ends link to each other with Section Point (O2) with the 4th node (O4) respectively.
2. the DC power supply of 1500V input-110V according to claim 1 output, it is characterized in that, contrary lead switch and be provided with five on off states, be respectively for described four: 1. first contraryly lead switch and the second contrary switch of leading is open-minded simultaneously, the 3rd contraryly leads switch and the 4th contrary switch of leading turn-offs; 2. second contrary lead switch and the 3rd contrary switch of leading is open-minded simultaneously, the first contrary switch and the 4th of leading is contraryly led switch and is turn-offed simultaneously; 3. the 3rd contrary lead switch and the 4th contrary switch of leading is open-minded, the first contrary switch and second of leading is contraryly led switch and is turn-offed simultaneously; 4. second contrary lead switch and the 3rd contrary switch of leading is open-minded, the first contrary switch and the 4th of leading is contraryly led switch and is turn-offed simultaneously; 5. synchronization can only have two switch conductions, and first can not be open-minded simultaneously against leading switch against leading switch and the 4th.
3. the DC power supply of 1500V input-110V according to claim 1 and 2 output, it is characterized in that, the circuit structure of described sub-rectification circuit is identical, concrete method of attachment: the positive pole of the first diode links to each other with the positive pole of the upper secondary winding of the first step-down transformer, negative pole links to each other with out-put supply is anodal, the positive pole of the second diode links to each other with the negative pole of the upper secondary winding of the first step-down transformer, negative pole links to each other with out-put supply is anodal, one end of the first inductance links to each other with the centre cap of the secondary winding of the first step-down transformer, and an other end links to each other with the out-put supply negative pole; The negative pole of first, second, third, fourth diode links to each other with out-put supply is anodal, and the right-hand member of the first to second inductance links to each other with the out-put supply negative pole.
4. the DC power supply of 1500V input-110V according to claim 1 and 2 output, it is characterized in that, described filter circuit is capacitor filter, the 5th electric capacity and the 6th capacitances in series, two ends are connected with the out-put supply negative pole with out-put supply is anodal respectively, the 5th electric capacity two ends the 9th resistance in parallel wherein, the 6th electric capacity two ends the tenth resistance in parallel, the 9th resistance and the tenth resistance are respectively the 5th electric capacity and the 6th capacitor voltage equalizing.
5. the DC power supply of 1500V input-110V output according to claim 4 is characterized in that the output output dc voltage of described filter circuit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201220124335 CN202840962U (en) | 2012-03-29 | 2012-03-29 | 1500V input-110V output dc power supply |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201220124335 CN202840962U (en) | 2012-03-29 | 2012-03-29 | 1500V input-110V output dc power supply |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110391748A (en) * | 2018-04-12 | 2019-10-29 | 广州迈斯宝新能源科技有限公司 | A kind of single channel dual transformer resonance DC converter |
| CN111835221A (en) * | 2020-07-17 | 2020-10-27 | 特变电工西安电气科技有限公司 | DC/AC power conversion device |
| WO2022088738A1 (en) * | 2020-10-26 | 2022-05-05 | 国网江苏省电力有限公司电力科学研究院 | Isolated low-voltage direct-current switching circuit and circuit switching apparatus, and control method |
-
2012
- 2012-03-29 CN CN 201220124335 patent/CN202840962U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110391748A (en) * | 2018-04-12 | 2019-10-29 | 广州迈斯宝新能源科技有限公司 | A kind of single channel dual transformer resonance DC converter |
| CN111835221A (en) * | 2020-07-17 | 2020-10-27 | 特变电工西安电气科技有限公司 | DC/AC power conversion device |
| WO2022088738A1 (en) * | 2020-10-26 | 2022-05-05 | 国网江苏省电力有限公司电力科学研究院 | Isolated low-voltage direct-current switching circuit and circuit switching apparatus, and control method |
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Granted publication date: 20130327 Termination date: 20140329 |