CN103117652A - Thermistor-based single-phase rectifier soft power on circuit - Google Patents
Thermistor-based single-phase rectifier soft power on circuit Download PDFInfo
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- CN103117652A CN103117652A CN2013100481079A CN201310048107A CN103117652A CN 103117652 A CN103117652 A CN 103117652A CN 2013100481079 A CN2013100481079 A CN 2013100481079A CN 201310048107 A CN201310048107 A CN 201310048107A CN 103117652 A CN103117652 A CN 103117652A
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Abstract
The invention provides a thermistor-based single-phase rectifier soft power on circuit. The single-phase rectifier soft power on circuit comprises a single-phase alternating current power supply for supplying power to the thermistor-based single-phase rectifier soft power on circuit, a rectifier circuit which is connected with the single-phase alternating current power supply and used for converting alternating current output by the single-phase alternating current power supply into direct current, a power on circuit which is connected with the single-phase alternating current power supply and the rectifier circuit respectively and used for limiting impact current generated by power on, and an energy storage circuit which is connected with the rectifier circuit and the power on circuit respectively and used for filtering the direct current output by the rectifier circuit and storing electric energy. By the thermistor-based single-phase rectifier soft power on circuit, harmful impact current generated by power on is avoided, and the problems that a switch connected to a power supply side trips, a power device of a rear-stage inverter circuit on a load side is burnt, and the like are solved; and the circuit has a simple structure, is convenient to control and is suitable for frequent start and stop, and direct current voltage cannot be interrupted.
Description
Technical field
The invention belongs to the converters technical field, relate to the soft electrification circuit of a kind of single-phase rectifier, particularly relate to the soft electrification circuit of a kind of single-phase rectifier based on thermistor.
Background technology
For the Technics of Power Electronic Conversion device that contains diode rectifier circuit of ac power supply, need to consider the soft problem that powers on, otherwise will break down at the stage Technics of Power Electronic Conversion device that powers on.The current limiting measures that power on commonly used adopt the startup stage increase in the line the method for current-limiting resistance, specifically comprise four kinds of methods:
(1) series limiting resistor on DC side or interchange live wire, current limliting when powering on, but utilize relay automatically to excise when the end that powers on is rear;
(2) series connection PTC thermistor, utilize its positive temperature characterisitic, current limliting when powering on, but utilize relay automatically to excise after the end that powers on;
(3) series connection NTC thermistor, utilize its negative temperature characteristic, current limliting when powering on, but keep on the line when the end that powers on is rear;
(4) reasonable circuit is set, power on finish after, adopt thyristor or other power device such as the IGBT short circuit resistance that powers on, thyristor or other power device still connect in the line.
The problem of front two kinds of methods is: brought the secondary current shock problem when resistance excises.The problem of the third method is: be only suitable for bearing power less than the application scenario of 200W., for the high-power applications occasion, need to improve the existing current-limiting circuit that powers on for this reason, thoroughly solve the power-on impact current problem.The problem of the 4th kind of method is that during the thyristor current flowing, the formation pressure drop produces consumption, reduces the efficient of whole circuit, causes insoluble heat dissipation problem.
Find through the retrieval to prior art, Zhang Xiangjun etc. have summed up two kinds of traditional soft starting circuits in " Electric Machines and Control " in June, 2011, " a kind of inrush current inhibition circuit " proposed, be the second-class impact current suppressing circuit, the one-shot electric current when this circuit can effectively suppress to start and secondary pulse electric current, but still there is impulse current, harmonic current impulse ratio to electrical network is more serious, and complex structure, component number is many, controls not easy.Adopt relay to cut off and power on power resistor or PTC resistance, can produce the CLICK noise, be unfavorable for equipment by related standards and standard, and after long-time the use, can cause relay damaged, cause fault.In addition, for high power load, be not suitable for adopting the relay excision to power on power resistor or PTC resistance, relay is difficult to type selecting.
For the frequency converter of convertible frequency air-conditioner, above-mentioned four kinds of methods and improve one's methods and all be not suitable with current needs, be mainly manifested in: (1) circuit is complicated; (2) inefficiency; (3) fringe cost is high; Especially the frequent start-stop of (4) on-the-spot test personnel or the convertible frequency air-conditioner that powers on such as test at the operation; the PTC resistance that adopts can produce because of heating very large resistance; can not charge frequently; cause electrochemical capacitor etc. less than charging; further make rear class inverter, Switching Power Supply all can not move; Switching Power Supply can not operation can cause control power supply disappearance; forever exist prior to electrical source of power and require to control power supply in the air-conditioning electrical system; otherwise can cause series of problems, therefore the electrification circuit of original convertible frequency air-conditioner is not suitable for Fraquent start and shutdown.
Summary of the invention
The shortcoming of prior art, the object of the present invention is to provide the soft electrification circuit of a kind of single-phase rectifier based on thermistor in view of the above, be used for to solve the power-on impact current that prior art exists, and causes pressure drop, loss, and the problem of heat radiation etc.
Reach for achieving the above object other relevant purposes, the invention provides the soft electrification circuit of a kind of single-phase rectifier based on thermistor.The soft electrification circuit of described single-phase rectifier comprises:
Single phase alternating current power supply is used to the soft electrification circuit power supply of described single-phase rectifier based on thermistor;
Rectification circuit is connected with described single phase alternating current power supply, is used for converting the alternating current of described single phase alternating current power supply output to direct current; Described rectification circuit comprises the first thyristor, the second thyristor, the first diode and the second diode;
Electrification circuit is connected with rectification circuit with described single phase alternating current power supply respectively, is used for the impulse current that restriction powers on and produces; Described electrification circuit comprises the first thermistor, the second thermistor, the 3rd diode and the 4th diode;
Accumulator is connected with electrification circuit with described rectification circuit respectively, is used for direct current filtering and storing electrical energy to rectification circuit output; Described accumulator comprises an electrochemical capacitor.
Preferably, in described rectification circuit, the negative electrode of the first diode connects the anode of the first thyristor, the anode of anodic bonding second diode of the first diode, the negative electrode of the second diode connects the anode of the second thyristor, and the negative electrode of the second thyristor connects the negative electrode of described the first thyristor.
Preferably, described the first thyristor, the second thyristor, the first diode and the second diode consist of the 2H bridge construction of half control, and the first thyristor and the first diode consist of the first brachium pontis, and the second thyristor and the second diode consist of the second brachium pontis.
Preferably, in described electrification circuit, an end of the first thermistor connects the negative electrode of the first diode in described rectification circuit, the other end of the first thermistor connects the anode of the 3rd diode, the negative electrode of the 3rd diode is connected with the negative electrode of the 4th diode, the anode of the 4th diode is connected with an end of the second thermistor, and the other end of the second thermistor connects the negative electrode of the second diode in described rectification circuit.
Preferably, the first thermistor is connected with the 3rd diode, and the second thermistor is connected with the 4th diode and is used for realizing soft powering on.
Preferably, the positive pole of the described electrochemical capacitor in described accumulator forms the direct current output cathode, and the negative pole of electrochemical capacitor forms the direct current output negative pole.
As mentioned above, the soft electrification circuit of the single-phase rectifier based on thermistor of the present invention has following beneficial effect:
1, avoided because power on and produce the impulse current with harm, can not cause the problems such as power device as switch trip that mains side connects and load-side rear class inverter circuit burns.
2, circuit structure is simple, and it is convenient to control, and is fit to Fraquent start and shutdown, and direct voltage can be not interrupted.
Description of drawings
Fig. 1 is shown as the structural representation of the soft electrification circuit of single-phase rectifier based on thermistor of the present invention.
Fig. 2 is shown as the structural representation of the soft electrification circuit of the single-phase rectifier based on thermistor of the present invention in an instantiation.
The element numbers explanation
1 single phase alternating current power supply
2 rectification circuits
3 electrification circuits
4 accumulators
Embodiment
Below by specific instantiation explanation embodiments of the present invention, those skilled in the art can understand other advantages of the present invention and effect easily by the disclosed content of this specification.The present invention can also be implemented or be used by other different embodiment, and the every details in this specification also can be based on different viewpoints and application, carries out various modifications or change under spirit of the present invention not deviating from.
See also accompanying drawing.Need to prove, the diagram that provides in the present embodiment only illustrates basic conception of the present invention in a schematic way, satisfy only show in graphic with the present invention in relevant assembly but not component count, shape and size drafting when implementing according to reality, during its actual enforcement, kenel, quantity and the ratio of each assembly can be a kind of random change, and its assembly layout kenel also may be more complicated.
The invention provides the soft electrification circuit of a kind of single-phase rectifier based on thermistor, be used for to solve the problem of the power-on impact current that prior art exists.Below will elaborate principle and the execution mode of a kind of soft electrification circuit of single-phase rectifier based on thermistor of the present invention, and make those skilled in the art not need creative work can understand the soft electrification circuit of a kind of single-phase rectifier based on thermistor of the present invention.
The present invention is described in detail below in conjunction with embodiment and accompanying drawing.
The present embodiment provides the soft electrification circuit of single-phase rectifier based on thermistor, and as shown in Figure 1, the soft electrification circuit of described single-phase rectifier based on thermistor comprises:
Single phase alternating current power supply 1 is used to the soft electrification circuit power supply of described single-phase rectifier based on thermistor, and described single phase alternating current power supply 1 is the two-phase alternating current power supply, comprises a live wire ACL and and zero line ACN.
Electrification circuit 3 is connected with rectification circuit with described single phase alternating current power supply 1 respectively and is connected, and is used for the impulse current that restriction powers on and produces.Described electrification circuit 3 comprises the first thermistor VR1, the second thermistor VR2, the 3rd diode D3 and the 4th diode D4.Described the first thermistor VR1 and the second thermistor VR2 are also replaceable is common power resistance.The first thermistor VR1 connects with the 3rd diode D3, and the second thermistor VR2 connects with the 4th diode D4.Wherein, the end of the first thermistor VR1 connects the negative electrode of the first diode D1 in described rectification circuit 2, the other end of the first thermistor VR1 connects the anode of the 3rd diode D3, the negative electrode of the 3rd diode D3 is connected with the negative electrode of the 4th diode D4, the anode of the 4th diode D4 is connected with the end of the second thermistor VR2, and the other end of the second thermistor VR2 connects the negative electrode of the second diode D2 in described rectification circuit 2.The first thermistor VR1 connects with the 3rd diode D3, and the second thermistor VR2 connects with the 4th diode D3, is used for realizing soft powering on.
Accumulator 4, respectively with described rectification circuit 2 be connected electrification circuit 3 and be connected, be used for direct current filtering and storing electrical energy to rectification circuit 2 outputs.Described accumulator 4 comprises electrochemical capacitor C.The positive pole of described electrochemical capacitor C forms direct current output cathode DCP, and the negative pole of electrochemical capacitor C forms direct current output negative pole DCN.
The specific works process of the described soft electrification circuit of single-phase rectifier based on thermistor of the present embodiment is as follows:
When if the back does not connect electric circuit 3, described single phase alternating current power supply 1 is the two-phase alternating current power supply, and the alternating current of single phase alternating current power supply 1 output is through obtaining the direct current of two pulsation after rectification circuit 2.Electrochemical capacitor C load filtering and energy storage in described accumulator 4.If under electrochemical capacitor C cold conditions, the direct current of two pulsation directly is electrochemical capacitor C charging, described electrochemical capacitor C can produce the current spike of higher magnitude, flow through the two-phase alternating current electrical network, can bring a series of harm like this, burn etc. as the power device of switch trip that mains side connects and load-side rear class inverter circuit.And the effect of described electrification circuit 3 is exactly the deleterious current spike that produces when limiting described single phase alternating current power supply 1 and powering on.
In the present embodiment, at the beginning of powering on, on the rear class DC line of described electrification circuit 3 access rectification circuits 2, be electrochemical capacitor C charging by the first thermistor VR1, charge constant is first thermistor VR1(the second thermistor VR2) with the product of electrochemical capacitor C, first thermistor VR1(the second thermistor VR2) resistance is larger, charges slower, and the current spike with harm of generation is less.According to the capacitance size of electrochemical capacitor C, first thermistor VR1(the second thermistor VR2 is set rationally) resistance, just can not cause that like this power device as switch trip that mains side connects and load-side rear class inverter circuit such as burns at the problem.In the present embodiment, adopt two groups of diodes, i.e. the first diode D1, the second diode D2 and the 3rd diode D3, the 4th diode D4 and thermistor, i.e. the first thermistor VR1 and the second thermistor VR2 series connection is used for realizing soft powering on, and prevent that single thermistor from crossing thermal impact and powering on, eliminate the situation that Switching Power Supply that DC side connects can not get electricity, especially be fit to the application scenario that frequent starting powers on.
During near single phase poaer supply voltage max or other suitable magnitude of voltage, need excision first thermistor VR1(the second thermistor VR2 when the voltage of described electrochemical capacitor C), otherwise whole circuit can't work and maybe can't realize controlled powering on.At this moment, process according to single-phase half-controlled phase control rectifier circuit, the pilot angle that the first thyristor VT1, the second thyristor VT2 are set is zero, in different single phase poaer supplies intervals, the first thyristor VT1 of described rectification circuit 2, the second thyristor VT2 be forward bias respectively, through two conductings of overdriving.After the first thyristor VT1, the second thyristor VT2 conducting, electric current flow through the first thyristor VT1, the second thyristor VT2, pipe presses pressure drop in the 1.7V left and right, is equivalent to short circuit first thermistor VR1(the second thermistor VR2), whole circuit enters the state of normal operation.
In case after described the first thyristor VT1 conducting, if late-class circuit does not quit work, the first thyristor VT1 just can not fall from dynamic circuit breaker so.
Therefore to sum up, charge complete after, the first thyristor VT1 in described rectification circuit 2 and the second thyristor VT2 can triggering and conducting for first thermistor VR1(the second thermistor VR2 of short circuit electrification circuit 3).First thermistor VR1(the second thermistor VR2 in described electrification circuit 3) can be used for realizing soft powering on.The first diode D1, the 3rd diode D3, the 4th diode D4 are used for preventing the phase fault of single phase poaer supply, and the position of its anode and negative electrode can exchange.
In the present embodiment, described single phase alternating current power supply 1 is the two-phase alternating current power supply that can adopt the free voltage grades such as 220V or 110V.Two phase commit bridge in described rectification circuit 2 is for supporting 35A/100 ° of C, the two phase commit bridge of 600V.Electrochemical capacitor C in described accumulator 4 is 4 * 680 μ F, single only withstand voltage 450V.The first thermistor VR1 in described electrification circuit 3 and the second thermistor VR2 cold conditions value are 68 Ω and support 5W power.The first thyristor VT1, the second thyristor VT2 support 75A/100 ° of C, 800V.The 3rd diode D3, the 4th diode D4 support 10A/100 ° of C, 600V.The first diode D1, the second diode D2 support 35A/100 ° of C, 600V.
See also Fig. 2, Fig. 2 is the structural representation of the soft electrification circuit of the single-phase rectifier based on thermistor of the present invention in an instantiation.
The operation principle of this instantiation and above-mentioned embodiment are identical.Unique difference is circuit structure, be the first thyristor VT1 and the position of the second thyristor VT2 and the location swap of the first diode D1 and the second diode D2 in described rectification circuit 2, namely the first diode D1 and the second diode D2 are placed in high-endly, and the first thyristor VT1 and the second thyristor VT2 are placed in low side.Correspondingly, described electrification circuit 3 is placed in low side.
Described rectification circuit 2 is connected with described single phase alternating current power supply 1, is used for converting the alternating current of described single phase alternating current power supply 1 output to direct current.In this instantiation, described rectification circuit 2 comprises the first thyristor VT1, the second thyristor VT2, the first diode D1 and the second diode D2.Wherein, the negative electrode of anodic bonding the first thyristor VT1 of the first diode D1, the negative electrode of the first diode D1 connects the negative electrode of the second diode D2, the negative electrode of anodic bonding the second thyristor VT2 of the second diode D2, the anode of described the first thyristor VT1 of the anodic bonding of the second thyristor VT2.The first thyristor VT1 and the first diode D1 consist of the first brachium pontis, and the second thyristor VT2 and the second diode D2 consist of the second brachium pontis.
Described electrification circuit 3 is connected with rectification circuit with described single phase alternating current power supply 1 respectively and is connected, and is used for the impulse current that restriction powers on and produces.Described electrification circuit 3 comprises the first thermistor VR1, the second thermistor VR2, the 3rd diode D3 and the 4th diode D4.Described the first thermistor VR1 and the second thermistor VR2 are also replaceable is common power resistance.Wherein, the negative electrode of the 3rd diode D3 connects the anode of the first diode D1 in described rectification circuit 2, the end of anodic bonding the first temperature-sensitive VR1 of the 3rd diode D3, the other end of the first thermistor VR1 connects the end of the second thermistor VR2, the other end of the second thermistor VR2 connects the anode of the 4th diode D4, and the negative electrode of the 4th diode D4 connects the anode of the second diode D2 in described rectification circuit 2.
This instantiation is taked low side half control structure in control, be the driving Switching Power Supplies that need to adopt two tunnel isolation in theory, and during still for employing isolating transformer drive scheme, low side half control structure only needs one tunnel driving Switching Power Supply.
The soft electrification circuit of single-phase rectifier based on thermistor of the present invention has been avoided producing the impulse current with harm because power on, can not cause that power device as switch trip that mains side connects and load-side rear class inverter circuit such as burns at the problem, its circuit structure is simple, it is convenient to control, and direct voltage is steady.The soft electrification circuit of described single-phase rectifier based on thermistor can be widely used in the power converter that all front stage circuits are single-phase rectifier, and as convertible frequency air-conditioner, convertible frequency air-conditioner has a large capacity and a wide range.
In sum, the present invention has effectively overcome various shortcoming of the prior art and the tool high industrial utilization.
Above-described embodiment is illustrative principle of the present invention and effect thereof only, but not is used for restriction the present invention.Any person skilled in the art scholar all can under spirit of the present invention and category, modify or change above-described embodiment.Therefore, have in technical field under such as and know that usually the knowledgeable modifies or changes not breaking away from all equivalences of completing under disclosed spirit and technological thought, must be contained by claim of the present invention.
Claims (6)
1. the soft electrification circuit of the single-phase rectifier based on thermistor, is characterized in that, the soft electrification circuit of described single-phase rectifier comprises:
Single phase alternating current power supply is used to the soft electrification circuit power supply of described single-phase rectifier based on thermistor;
Rectification circuit is connected with described single phase alternating current power supply, is used for converting the alternating current of described single phase alternating current power supply output to direct current; Described rectification circuit comprises the first thyristor, the second thyristor, the first diode and the second diode;
Electrification circuit is connected with rectification circuit with described single phase alternating current power supply respectively, is used for the impulse current that restriction powers on and produces; Described electrification circuit comprises the first thermistor, the second thermistor, the 3rd diode and the 4th diode;
Accumulator is connected with electrification circuit with described rectification circuit respectively, is used for direct current filtering and storing electrical energy to rectification circuit output; Described accumulator comprises an electrochemical capacitor.
2. the soft electrification circuit of the single-phase rectifier based on thermistor according to claim 1, it is characterized in that: in described rectification circuit, the negative electrode of the first diode connects the anode of the first thyristor, the anode of anodic bonding second diode of the first diode, the negative electrode of the second diode connects the anode of the second thyristor, and the negative electrode of the second thyristor connects the negative electrode of described the first thyristor.
3. the soft electrification circuit of the single-phase rectifier based on thermistor according to claim 2, it is characterized in that: described the first thyristor, the second thyristor, the first diode and the second diode consist of the 2H bridge construction of half control, the first thyristor and the first diode consist of the first brachium pontis, and the second thyristor and the second diode consist of the second brachium pontis.
4. the soft electrification circuit of the single-phase rectifier based on thermistor according to claim 1, it is characterized in that: in described electrification circuit, an end of the first thermistor connects the negative electrode of the first diode in described rectification circuit, the other end of the first thermistor connects the anode of the 3rd diode, the negative electrode of the 3rd diode is connected with the negative electrode of the 4th diode, the anode of the 4th diode is connected with an end of the second thermistor, and the other end of the second thermistor connects the negative electrode of the second diode in described rectification circuit.
5. the soft electrification circuit of the single-phase rectifier based on thermistor according to claim 4, it is characterized in that: the first thermistor is connected with the 3rd diode, and the second thermistor is connected with the 4th diode and is used for realizing soft powering on.
6. the soft electrification circuit of the single-phase rectifier based on thermistor according to claim 1, is characterized in that: the positive pole formation direct current output cathode of the described electrochemical capacitor in described accumulator, the negative pole formation direct current output negative pole of electrochemical capacitor.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105515410A (en) * | 2015-12-22 | 2016-04-20 | 上海交通大学 | Rectifying circuit with isolation drive and soft power-on functions |
| CN113328609A (en) * | 2021-06-03 | 2021-08-31 | 深圳弘远电气有限公司 | Drive circuit suitable for converter rectifier circuit silicon controlled rectifier |
| EP4016825A1 (en) * | 2020-12-18 | 2022-06-22 | STMicroelectronics (Tours) SAS | Voltage converter |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US10483869B1 (en) * | 2018-07-13 | 2019-11-19 | Stmicroelectronics Ltd | Power conversion circuit having inrush current limiting resistor bypass |
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| CN101127484A (en) * | 2007-05-23 | 2008-02-20 | 中国科学院电工研究所 | A digital high voltage DC power |
| CN201388156Y (en) * | 2009-03-05 | 2010-01-20 | 安徽颐和新能源科技股份有限公司 | Novel cascade type high-voltage inverter pre-charging circuit |
| CN102594116A (en) * | 2012-03-06 | 2012-07-18 | 广州金升阳科技有限公司 | Power starting circuit |
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| CN101127484A (en) * | 2007-05-23 | 2008-02-20 | 中国科学院电工研究所 | A digital high voltage DC power |
| CN201388156Y (en) * | 2009-03-05 | 2010-01-20 | 安徽颐和新能源科技股份有限公司 | Novel cascade type high-voltage inverter pre-charging circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105515410A (en) * | 2015-12-22 | 2016-04-20 | 上海交通大学 | Rectifying circuit with isolation drive and soft power-on functions |
| EP4016825A1 (en) * | 2020-12-18 | 2022-06-22 | STMicroelectronics (Tours) SAS | Voltage converter |
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Effective date of registration: 20191023 Address after: 201906 985 Fu Lian Road, Baoshan District, Shanghai, 4 Patentee after: Shanghai Confucian automation equipment Co., Ltd. Address before: 200433 No. 1803, 1805, 1806, 335 and 1807, building 2, National Road, Yangpu District, Shanghai Patentee before: Shanghai Ruking Electronic Science & Technology Co., Ltd. |