CN102044970A - High-voltage direct-current isolating switch power supply - Google Patents
High-voltage direct-current isolating switch power supply Download PDFInfo
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Abstract
The invention discloses a high-voltage direct-current isolating switch power supply which comprises a power conversion circuit, a drive circuit and an output circuit, wherein the power conversion circuit comprises a high-frequency transformer, an IGBT (Insulated Gate Bipolar Transistor) module and a blocking capacitor; N primary and secondary windings of the high-frequency transformer are respectively connected in series; the drive circuit comprises a signal generation circuit and an IGBT drive and protective circuit; the signal generation circuit is used for generating square signals, and the IGBT drive and protective circuit is used for providing complementary drive signals in two channels to the IGBT module; and the output circuit comprises an absorption circuit, a bridge rectifier, a filter inductor and a filter capacitor. The high-voltage direct-current isolating switch power supply can safely and effectively realize isolation from the primary circuit and supply power to the direct-current voltage detection circuit, has the advantages of high input voltage, wide transformation range, simple structure and high safety and reliability, and can keep the input and the output isolated.
Description
Technical field
The present invention relates to a kind of high voltage direct current isolating switch power, the high pressure that is used for the isolation of needs electricity is got the energy occasion, and the direct voltage that is particularly useful for contravariant current transformers such as high voltage converter, Active Power Filter-APF and reactive-load compensator detects the power supply requirement of link.
Background technology
With contravariant current transformers such as high voltage converter, Active Power Filter-APF and reactive-load compensators is that the power electronic equipment of representative just is being widely used in industrial circles such as electric power, coal, metallurgy, weaving, but the control system of contravariant current transformer need detect the voltage signal of DC side.Measuring circuit needs DC power supply in detecting link, yet how getting also easily in the high pressure occasion, the DC power supply that provides of safety is a challenge.
Along with progressively transition of the upgrading of the economic development mode and the industrial structure, the requirement of energy-saving and emission-reduction becomes the common recognition of social development day by day.Have benefited from the development of power electronic device and Semiconductor Converting Technology, the application by power electronic equipments such as high voltage converter, active power filtering and reactive power compensations facts have proved it is a kind of effective means to the requirement that the transformation and upgrade of traditional energy consumption industry reach energy-saving and emission-reduction.
The control system of contravariant current transformers such as high voltage converter, Active Power Filter-APF and reactive-load compensator needs to detect the also voltage of stable DC side according to its control strategy.Usually, the direct voltage testing circuit belongs to secondary circuit, considers easily and need reliably isolate with primary circuit for safety and control.Therefore, for providing the design of the high voltage direct current isolating switch power of power supply, dc detection circuit just seems particularly crucial.
At present, the popular direct-current switch power supply of industry is because the restriction of circuit topological structure, switching device and cost can't directly apply to the power supply occasion of required dc detection circuit.
Summary of the invention
The purpose of this invention is to provide a kind of high voltage direct current isolating switch power that is used to the direct voltage testing circuit power supply of contravariant current transformers such as high voltage converter, Active Power Filter-APF and reactive-load compensator.
For reaching above-mentioned purpose, the present invention has following two kinds of technical solutions:
Scheme 1
High voltage direct current isolating switch power of the present invention comprises power conversion circuit, drive circuit and output circuit;
The – power conversion circuit comprises: N high frequency transformer, IGBT module and capacitance, N is a positive integer, the former and deputy limit winding of N high frequency transformer is connected respectively, connect former limit and the series connection secondary no-load voltage ratio be 10:1, the IGBT module is by two monomer series-connected half-bridge structures of forming of IGBT, one end of N the former limit series connection of high frequency transformer winding is connected with the output of IGBT module, the other end links to each other with an end of capacitance, the other end of capacitance links to each other with IGBT module negative pole and ground connection, and IGBT module positive pole links to each other with input direct voltage is anodal;
The – drive circuit comprises: the signal generating circuit and the IGBT that produce square-wave signal drive and protective circuit, the output of signal generating circuit and IGBT drive and the input of protective circuit links to each other, and the two-way complementary drive signal that IGBT drives and protective circuit is exported links to each other with the grid of two IGBT monomers of IGBT module respectively;
The – output circuit comprises, by first inductance, the absorption circuit that second inductance and electric capacity constitute, the rectifier bridge heap, filter inductance and filter capacitor, one end of N high frequency transformer secondary series connection winding links to each other with an end of first inductance, one end of the other end of first inductance and second inductance and an end of electric capacity connect altogether, the other end of second inductance links to each other with an ac input end of rectifier bridge heap, the connect other end of winding of another ac input end of rectifier bridge heap and the other end of electric capacity and N high frequency transformer secondary connects altogether, the anode of rectifier bridge heap direct current output links to each other with an end of filter inductance, the other end of filter inductance links to each other with the positive pole of filter capacitor, and the negative terminal of rectifier bridge heap direct current output links to each other with the negative pole of filter capacitor and ground connection.The two ends of filter capacitor are the positive and negative electrode of output dc voltage.
Scheme 2
High voltage direct current isolating switch power of the present invention comprises power conversion circuit, drive circuit and output circuit;
The – power conversion circuit comprises: N high frequency transformer, IGBT module and capacitance, N is a positive integer, the former and deputy limit winding of N high frequency transformer is connected respectively, connect former limit and the series connection secondary no-load voltage ratio be 10:1, the IGBT module is by two monomer series-connected half-bridge structures of forming of IGBT, one end of N the former limit series connection of high frequency transformer winding is connected with the output of IGBT module, the other end links to each other with an end of capacitance, the other end of capacitance links to each other with IGBT module negative pole and ground connection, and IGBT module positive pole links to each other with input direct voltage is anodal;
The – drive circuit comprises: the signal generating circuit and the IGBT that produce square-wave signal drive and protective circuit, the output of signal generating circuit and IGBT drive and the input of protective circuit links to each other, and the two-way complementary drive signal that IGBT drives and protective circuit is exported links to each other with the grid of two IGBT monomers of IGBT module respectively;
The – output circuit comprises, rectifier bridge heap, filter inductance and filter capacitor, one end of N high frequency transformer secondary series connection winding links to each other with an ac input end of rectifier bridge heap, another ac input end of rectifier bridge heap links to each other with the other end of N high frequency transformer secondary series connection winding, the anode of rectifier bridge heap direct current output links to each other with an end of filter inductance, the other end of filter inductance links to each other with the positive pole of filter capacitor, and the negative terminal of rectifier bridge heap direct current output links to each other with the negative pole of filter capacitor and ground connection.The two ends of filter capacitor are the positive and negative electrode of output dc voltage.
Beneficial effect of the present invention is:
The high voltage direct current isolating switch power can be realized powering with the isolation of primary circuit and to the direct voltage testing circuit safely and effectively.This power input voltage height, transformation range broadness, simple in structure, safe and reliable.Series connection high frequency transformer has wherein been shared the input dc high voltage, makes the High-Voltage Insulation problem obtain appropriate processing.
Description of drawings
Fig. 1 is a kind of electrical block diagram of high voltage direct current isolating switch power.
Fig. 2 is the another kind of electrical block diagram of high voltage direct current isolating switch power.
Embodiment
Shown in Figure 1 is the present invention program 1 electrical block diagram, and the high voltage direct current isolating switch power comprises power conversion circuit 1, drive circuit 2 and output circuit 3;
– power conversion circuit 1 comprises: N high frequency transformer T1～TN, IGBT module S and capacitance C2, N is a positive integer, N high frequency transformer former, the secondary winding is connected respectively, connect former limit and the series connection secondary no-load voltage ratio be 10:1, IGBT module S is by two monomer series-connected half-bridge structures of forming of IGBT, one end of N the former limit series connection of high frequency transformer winding is connected with the output of IGBT module S, the other end links to each other with the end of capacitance C2, the other end of capacitance C2 links to each other with IGBT module S negative pole and ground connection, and IGBT module S positive pole links to each other with input direct voltage is anodal;
– drive circuit 2 comprises: the signal generating circuit 2.1 and the IGBT that produce square-wave signal drive and protective circuit 2.2, the output of signal generating circuit 2.1 and IGBT drive and the input of protective circuit 2.2 links to each other, and the two-way complementary drive signal that IGBT drives and protective circuit 2.2 is exported links to each other with the grid of two IGBT monomers of IGBT module S respectively;
– output circuit 3 comprises, by first inductance L 1, the absorption circuit that second inductance L 2 and capacitor C 3 constitute, rectifier bridge heap D, filter inductance L3 and filter capacitor C4, one end of N high frequency transformer secondary series connection winding links to each other with an end of first inductance L 1, one end of the other end of first inductance L 1 and second inductance L 2 and an end of capacitor C 3 connect altogether, the other end of second inductance L 2 links to each other with the ac input end of rectifier bridge heap D, the connect other end of winding of another ac input end of rectifier bridge heap D and the other end of capacitor C 3 and N high frequency transformer secondary connects altogether, the anode of rectifier bridge heap D direct current output links to each other with the end of filter inductance L3, the other end of filter inductance L3 links to each other with the positive pole of filter capacitor C4, and the negative terminal of rectifier bridge heap D direct current output links to each other with the negative pole of filter capacitor C4 and ground connection.The two ends of filter capacitor C4 are the positive and negative electrode of output dc voltage.
Operation principle is as follows: duty ratio of signal generating circuit 2.1 outputs is about 50% square-wave signal to IGBT driving and protective circuit 2.2; provide two-way complementary drive signal by IGBT driving and protective circuit 2.2 for IGBT module S; IGBT module S carries out copped wave with the dc high voltage of input; series connection high frequency transformer T1's to TN is former; the secondary no-load voltage ratio is 10:1; the voltage square wave that series connection high frequency transformer T1 to TN forms the IGBT copped wave of former limit carries out decompression transformation and obtains the voltage square wave that the secondary amplitude is former limit about 1/10; the voltage square wave of secondary is again through absorbing circuit L1; L2; C3; rectifier bridge heap D; the filter action of filter inductance L3 and filter capacitor C4 can obtain required low-voltage dc voltage, is follow-up electric.Wherein, the high frequency transformer T1 to TN of series connection has shared the input dc high voltage, makes the High-Voltage Insulation problem obtain appropriate processing.
Shown in Figure 2 is the present invention program 2 electrical block diagram, and the high voltage direct current isolating switch power comprises power conversion circuit 1, drive circuit 2 and output circuit 3;
– power conversion circuit 1 comprises: N high frequency transformer T1～TN, IGBT module S and capacitance C2, N is a positive integer, N high frequency transformer former, the secondary winding is connected respectively, connect former limit and the series connection secondary no-load voltage ratio be 10:1, IGBT module S is by two monomer series-connected half-bridge structures of forming of IGBT, one end of N the former limit series connection of high frequency transformer winding is connected with the output of IGBT module S, the other end links to each other with the end of capacitance C2, the other end of capacitance C2 links to each other with IGBT module S negative pole and ground connection, and IGBT module S positive pole links to each other with input direct voltage is anodal;
– drive circuit 2 comprises: the signal generating circuit 2.1 and the IGBT that produce square-wave signal drive and protective circuit 2.2, the output of signal generating circuit 2.1 and IGBT drive and the input of protective circuit 2.2 links to each other, and the two-way complementary drive signal that IGBT drives and protective circuit 2.2 is exported links to each other with the grid of two IGBT monomers of IGBT module S respectively;
– output circuit 3 comprises, rectifier bridge heap D, filter inductance L3 and filter capacitor C4, one end of N high frequency transformer secondary series connection winding links to each other with the ac input end of rectifier bridge heap D, another ac input end of rectifier bridge heap D links to each other with the other end of N high frequency transformer secondary series connection winding, the anode of rectifier bridge heap D direct current output links to each other with the end of filter inductance L3, the other end of filter inductance L3 links to each other with the positive pole of filter capacitor C4, and the negative terminal of rectifier bridge heap D direct current output links to each other with the negative pole of filter capacitor C4 and ground connection.The two ends of filter capacitor C4 are the positive and negative electrode of output dc voltage.
Operation principle is as follows: duty ratio of signal generating circuit 2.1 outputs is about 50% square-wave signal to IGBT driving and protective circuit 2.2; provide two-way complementary drive signal by IGBT driving and protective circuit 2.2 for IGBT module S; IGBT module S carries out copped wave with the dc high voltage of input; series connection high frequency transformer T1's to TN is former; the secondary no-load voltage ratio is 10:1; the voltage square wave that series connection high frequency transformer T1 to TN forms the IGBT copped wave of former limit carries out decompression transformation and obtains the voltage square wave that the secondary amplitude is former limit about 1/10; the voltage square wave of secondary is through rectifier bridge heap D; the filter action of filter inductance L3 and filter capacitor C4 can obtain required low-voltage dc voltage, is follow-up electric.Wherein, the high frequency transformer T1 to TN of series connection has shared the input dc high voltage, makes the High-Voltage Insulation problem obtain appropriate processing.
Claims (2)
1. the high voltage direct current isolating switch power is characterized in that: comprise power conversion circuit (1), drive circuit (2) and output circuit (3);
– power conversion circuit (1) comprising: and N high frequency transformer (T1～TN), IGBT module (S) and capacitance (C2), N is a positive integer, N high frequency transformer former, the secondary winding is connected respectively, connect former limit and the series connection secondary no-load voltage ratio be 10:1, IGBT module (S) is by two monomer series-connected half-bridge structures of forming of IGBT, one end of N the former limit series connection of high frequency transformer winding is connected with the output of IGBT module (S), the other end links to each other with an end of capacitance (C2), the other end of capacitance (C2) links to each other with IGBT module (S) negative pole and ground connection, and IGBT module (S) is anodal to link to each other with input direct voltage is anodal;
– drive circuit (2) comprising: the signal generating circuit (2.1) and the IGBT that produce square-wave signal drive and protective circuit (2.2), the output of signal generating circuit (2.1) and IGBT drive and the input of protective circuit (2.2) links to each other, and the two-way complementary drive signal that IGBT drives and protective circuit (2.2) is exported links to each other with the grid of two IGBT monomers of IGBT module (S) respectively;
– output circuit (3) comprises, by first inductance (L1), the absorption circuit that second inductance (L2) and electric capacity (C3) constitute, rectifier bridge heap (D), filter inductance (L3) and filter capacitor (C4), one end of N high frequency transformer secondary series connection winding links to each other with an end of first inductance (L1), one end of one end of the other end of first inductance (L1) and second inductance (L2) and electric capacity (C3) connects altogether, the other end of second inductance (L2) links to each other with an ac input end of rectifier bridge heap (D), the connect other end of winding of another ac input end of rectifier bridge heap (D) and the other end of electric capacity (C3) and N high frequency transformer secondary connects altogether, the anode of rectifier bridge heap (D) direct current output links to each other with an end of filter inductance (L3), the other end of filter inductance (L3) links to each other with the positive pole of filter capacitor (C4), the negative terminal of rectifier bridge heap (D) direct current output also ground connection that links to each other with the negative pole of filter capacitor (C4), the two ends of filter capacitor (C4) be output dc voltage just, negative pole.
2. the high voltage direct current isolating switch power is characterized in that: comprise power conversion circuit (1), drive circuit (2) and output circuit (3);
– power conversion circuit (1) comprising: and N high frequency transformer (T1～TN), IGBT module (S) and capacitance (C2), N is a positive integer, N high frequency transformer former, the secondary winding is connected respectively, connect former limit and the series connection secondary no-load voltage ratio be 10:1, IGBT module (S) is by two monomer series-connected half-bridge structures of forming of IGBT, one end of N the former limit series connection of high frequency transformer winding is connected with the output of IGBT module (S), the other end links to each other with an end of capacitance (C2), the other end of capacitance (C2) links to each other with IGBT module (S) negative pole and ground connection, and IGBT module (S) is anodal to link to each other with input direct voltage is anodal;
– drive circuit (2) comprising: the signal generating circuit (2.1) and the IGBT that produce square-wave signal drive and protective circuit (2.2), the output of signal generating circuit (2.1) and IGBT drive and the input of protective circuit (2.2) links to each other, and the two-way complementary drive signal that IGBT drives and protective circuit (2.2) is exported links to each other with the grid of two IGBT monomers of IGBT module (S) respectively;
– output circuit (3) comprises, rectifier bridge heap (D), filter inductance (L3) and filter capacitor (C4), one end of N high frequency transformer secondary series connection winding links to each other with an ac input end of rectifier bridge heap (D), another ac input end of rectifier bridge heap (D) links to each other with the other end of N high frequency transformer secondary series connection winding, the anode of rectifier bridge heap (D) direct current output links to each other with an end of filter inductance (L3), the other end of filter inductance (L3) links to each other with the positive pole of filter capacitor (C4), the negative terminal of rectifier bridge heap (D) direct current output also ground connection that links to each other with the negative pole of filter capacitor (C4), the two ends of filter capacitor (C4) be output dc voltage just, negative pole.
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| CN 201110025637 CN102044970A (en) | 2011-01-24 | 2011-01-24 | High-voltage direct-current isolating switch power supply |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104917397A (en) * | 2015-06-12 | 2015-09-16 | 昆山禾信质谱技术有限公司 | High-voltage radio frequency power supply for mass spectrometer |
| CN105467314A (en) * | 2016-01-26 | 2016-04-06 | 云南电网有限责任公司电力科学研究院 | High voltage DC isolation switch performance detection device |
| CN107839525A (en) * | 2017-10-25 | 2018-03-27 | 安徽中科海奥电气股份有限公司 | A kind of 10KV inputs multichannel rectification copped wave integration charging station |
| CN109039089A (en) * | 2018-08-21 | 2018-12-18 | 珠海瑞捷电气股份有限公司 | The isolating switch power of super wide voltage input |
| CN110572019A (en) * | 2018-06-06 | 2019-12-13 | 青岛鼎信通讯股份有限公司 | wide-range, high-reliability and low-EMI flyback switching power supply |
| CN112701921A (en) * | 2020-12-22 | 2021-04-23 | 苏州笑聪电气设备有限公司 | Intelligent power distribution control system |
| CN117955427A (en) * | 2024-02-01 | 2024-04-30 | 中科智寰(北京)科技有限公司 | Low-voltage output direct-current electric energy router and photovoltaic access power supply system |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104917397A (en) * | 2015-06-12 | 2015-09-16 | 昆山禾信质谱技术有限公司 | High-voltage radio frequency power supply for mass spectrometer |
| CN105467314A (en) * | 2016-01-26 | 2016-04-06 | 云南电网有限责任公司电力科学研究院 | High voltage DC isolation switch performance detection device |
| CN107839525A (en) * | 2017-10-25 | 2018-03-27 | 安徽中科海奥电气股份有限公司 | A kind of 10KV inputs multichannel rectification copped wave integration charging station |
| CN107839525B (en) * | 2017-10-25 | 2024-03-29 | 安徽中科海奥电气股份有限公司 | 10KV input multipath rectification and chopping integrated charging station |
| CN110572019A (en) * | 2018-06-06 | 2019-12-13 | 青岛鼎信通讯股份有限公司 | wide-range, high-reliability and low-EMI flyback switching power supply |
| CN109039089A (en) * | 2018-08-21 | 2018-12-18 | 珠海瑞捷电气股份有限公司 | The isolating switch power of super wide voltage input |
| CN109039089B (en) * | 2018-08-21 | 2024-06-04 | 珠海瑞捷电气股份有限公司 | Ultra-wide voltage input isolating switch power supply |
| CN112701921A (en) * | 2020-12-22 | 2021-04-23 | 苏州笑聪电气设备有限公司 | Intelligent power distribution control system |
| CN117955427A (en) * | 2024-02-01 | 2024-04-30 | 中科智寰(北京)科技有限公司 | Low-voltage output direct-current electric energy router and photovoltaic access power supply system |
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Application publication date: 20110504 |