CN201918894U - Soft-starting circuit - Google Patents
Soft-starting circuit Download PDFInfo
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- CN201918894U CN201918894U CN 201020638807 CN201020638807U CN201918894U CN 201918894 U CN201918894 U CN 201918894U CN 201020638807 CN201020638807 CN 201020638807 CN 201020638807 U CN201020638807 U CN 201020638807U CN 201918894 U CN201918894 U CN 201918894U
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- soft
- bipolar transistor
- insulated gate
- gate bipolar
- starting
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Abstract
The utility model relates to a soft-starting circuit, which is characterized by comprising an insulated gate bipolar transistor module and a soft-starting resistor, wherein the insulated gate bipolar transistor module is connected in parallel with the soft-starting resistor. The insulated gate bipolar transistor module comprises an insulated gate bipolar transistor and an antiparallel diode; the anode of the antiparallel diode is connected with the emitter of the insulated gate bipolar transistor; and the cathode of the antiparallel diode is connected with the collector of the insulated gate bipolar transistor. The insulated gate bipolar transistor module provided by the utility model comprises two modules connected in parallel, and the soft-starting resistor provided by the utility model comprises two resistors connected in parallel. The soft-starting circuit has the following advantages: a main contactor and a soft-starting contactor are omitted, so that the installation space and the cost of devices are saved; the charging and discharging times of bus capacitors are reduced, and the service life of both a capacitor and the soft-starting resistors is prolonged; and the contactors have low probability of electric sparks.
Description
Technical field
The utility model relates to a kind of soft starting circuit, is mainly used in the soft start of DC-AC conversion power electronic equipment.
Background technology
In ac/dc conversion power electronic equipment field, ubiquitous soft starting device in the equipment, be used for process to the bus capacitor charging, charging current is limited, prevent to cause in the charge circuit: fuse opening, diode blow or problem such as life loss, bus capacitor life loss.The soft starting device of the maturation that extensively adopts has following several:
1, series resistance soft start---limit impulse current by the resistance that in this time period of charging to bus capacitor, seals in certain resistance in to main circuit.
2, thyristor soft start---the ON time by the control thyristor is controlled the size that the bus capacitor charging current is impacted, and the mode that increases gradually by ON time realizes soft start.
3, series thermal-sensitive resistance soft start---the method mainly is used in the soft starting circuit of small-power electric power electronic installation, and resistance reduces the resistance of negative temperature coefficient because generate heat, and then the electric current in the main circuit is increased.
4, special-purpose soft start transformer or charge power supply---this kind special equipment generally is applicable to the Technics of Power Electronic Conversion device of super high power, as high-voltage dc transmission power station etc.
In the extensive large power power electronic appliance that uses now, above-mentioned 1,2 two kind of device adopted widely because have that cost is low, control is simple, advantage such as reliable operation, circuit structure are succinct.But inevitable shortcoming is arranged also:
1, the crosstalk resistance starts needs control two contactors---the soft contactor that opens in contactor and the main circuit, and wherein the cost of main contactor is considerable;
In the main circuit that does not adopt the half control device, half control devices such as use thyristor carry out soft start and are equivalent to increase identical extra cost, and half control device such as thyristor also needs to drive, and the driving of this type of half control device is the current mode driving, can't be compatible with the voltage-type driving of current full-control type IGBT, further increase the complexity and the cost of system.
The utility model content
Technical problem to be solved in the utility model is to overcome existing above-mentioned deficiency in the prior art, and provide a kind of design of bus IGBT soft starting circuit, save main contactor and the soft contactor that opens in the main loop of power circuit, with one or two IGBT replacement in parallel, to realize the reduction of main circuit device cost, take the minimizing of volume, improve the power density of power electronic equipment.
The utility model solves the problems of the technologies described above the technical scheme that is adopted: this soft starting circuit, it is characterized in that forming by IGBT module and soft start resistance, and IGBT module is in parallel with soft start resistance.
IGBT module described in the utility model comprises insulated gate bipolar transistor and inverse parallel diode, the inverse parallel diode cathode connects the insulated gate bipolar transistor emitter, and the inverse parallel diode cathode connects the insulated gate bipolar transistor collector electrode.
IGBT module described in the utility model is two modules in parallel.
Soft start resistance described in the utility model is two resistance in parallel.
The beneficial effects of the utility model are, have saved main contactor and the soft contactor that opens, and have saved installing space and device cost; Reduce the number of times that discharges and recharges of bus capacitor, prolonged the life-span of electric capacity and soft start resistance; Contactor is not easy to occur electric spark.Shortcoming is that the design of bus copper bar is comparatively complicated, and stray inductance is bigger than normal easily; Need disconnect the switch of prime during maintenance.
Description of drawings
Fig. 1 is the circuit structure diagram of the utility model embodiment.
Fig. 2 is the system construction drawing of the utility model embodiment when using.
The equivalent circuit structure figure of system when Fig. 3 is the disconnection of Fig. 2 IGBT module.
The equivalent circuit structure figure of system when Fig. 4 is Fig. 2 IGBT module closure.
Embodiment
Reach embodiment in conjunction with the accompanying drawings the utility model is carried out further detailed description.
Referring to Fig. 1, Fig. 2, the IGBT module 1(between the IGBT switching circuit 3 and dc-link capacitance filter circuit 4 is called bus IGBT to present embodiment on the dc bus by being series at) and the soft start resistance 2 of IGBT module 1 parallel connection therewith form.Described IGBT module 1 comprises insulated gate bipolar transistor D1 and inverse parallel diode D2, inverse parallel diode D2 positive pole connects insulated gate bipolar transistor D1 emitter, the input of dc-link capacitance filter circuit 4 just, inverse parallel diode D2 negative pole connects insulated gate bipolar transistor D1 collector electrode, the just dc output end of IGBT switching circuit 3.
Its operation principle is as follows:
After the input switch of power electronic equipment prime series connection closes, it is off-state that control logic is initially controlled bus IGBT, circuit topological structure as shown in Figure 3, electrical network input AC electricity is not controlled after the rectification through the inverse parallel diode D2 of insulated gate bipolar transistor D1, and the pulsating dc voltage of formation charges by 2 pairs of dc-link capacitance filter circuit 4 electric capacity of soft start resistance.Because soft start resistance 2 itself possesses certain resistance, therefore, be limited to the value that each device can both repeat to bear within a certain period of time in the circuit for the charging current of dc-link capacitance filter circuit 4 electric capacity, and along with increasing of the electric charge that stores in dc-link capacitance filter circuit 4 electric capacity, DC bus-bar voltage begins to raise gradually, and charging current is corresponding to be reduced gradually.When DC bus-bar voltage rises to certain value, bus IGBT conducting this moment, soft start resistance 2 is bypassed, and the topological structure of circuit becomes as shown in Figure 4.
After bus IGBT opens, the voltage of dc-link capacitance filter circuit 4 electric capacity be charged to certain lower slightly value of line voltage peak value on.Along with the increase or the minimizing of DC load, the electrical network energy is sent to the load of dc-link capacitance filter circuit 4 electric capacity and dc terminal continually through the rectification of inverse parallel diode D2 and the conducting of bus IGBT.When the situation of energy feedback appearred in DC load, the inverse parallel diode D2 of dc energy process bus IGBT flowed to insulated gate bipolar transistor D1 and pours into the front end electrical network.This moment, insulated gate bipolar transistor D1 was open-minded, provided dc energy to flow to the path of electrical network.
When any fault appearred in main circuit system, bus IGBT turn-offed, and soft start resistance 2 takes back in the middle of the main circuit again.Soft start resistance 2 only bears the discharging current of direct-current discharge resistance at this moment, much smaller than the rated power of soft start resistance 2.And if the input switch of power electronic equipment prime series connection this moment does not disconnect, the voltage of dc-link capacitance also maintains on the summary low value of grid ac voltage peak value always, when system starts once more, does not need dc-link capacitance is charged.If the switch of prime series connection disconnects, then repeat above-mentioned soft start-up process.
Effect of the present utility model:
The design advantage of the novel soft starting circuit of this kind is: saved main contactor and the soft contactor that opens, saved installing space and device cost; Reduce the number of times that discharges and recharges of bus capacitor, prolonged electric capacity and soft life-span of opening resistance; The disjunction of contactor machinery, combined floodgate cause electric spark easily, and in responsive occasion such as some explosion-proof grade, this kind of soft starting circuit does not have the above-mentioned shortcoming that electric spark occurs. Shortcoming is: the bus bar copper row design is comparatively complicated, and stray inductance is easily bigger than normal; Need to disconnect the switch of prime during maintenance.
Every simple deformation of the present utility model or equivalent transformation should be thought to fall into protection domain of the present utility model.
Claims (4)
1. soft starting circuit, it is characterized in that: be made up of IGBT module and soft start resistance, IGBT module is in parallel with soft start resistance.
2. soft starting circuit according to claim 1, it is characterized in that: described IGBT module comprises insulated gate bipolar transistor and inverse parallel diode, the inverse parallel diode cathode connects the insulated gate bipolar transistor emitter, and the inverse parallel diode cathode connects the insulated gate bipolar transistor collector electrode.
3. soft starting circuit according to claim 1 and 2 is characterized in that: described IGBT module is two modules in parallel.
4. soft starting circuit according to claim 1 and 2 is characterized in that: described soft start resistance is two resistance in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020638807 CN201918894U (en) | 2010-12-02 | 2010-12-02 | Soft-starting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020638807 CN201918894U (en) | 2010-12-02 | 2010-12-02 | Soft-starting circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201918894U true CN201918894U (en) | 2011-08-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201020638807 Expired - Fee Related CN201918894U (en) | 2010-12-02 | 2010-12-02 | Soft-starting circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201918894U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103887787A (en) * | 2014-01-29 | 2014-06-25 | 北方工业大学 | Arc extinguishing method of intrinsically safe inductive circuit |
| CN105743379A (en) * | 2014-12-12 | 2016-07-06 | 中车大连电力牵引研发中心有限公司 | Inverter charging switch and inverter |
| CN109660117A (en) * | 2018-12-26 | 2019-04-19 | 国网江苏省电力有限公司电力科学研究院 | A kind of electric power electric transformer starting control method |
-
2010
- 2010-12-02 CN CN 201020638807 patent/CN201918894U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103887787A (en) * | 2014-01-29 | 2014-06-25 | 北方工业大学 | Arc extinguishing method of intrinsically safe inductive circuit |
| CN103887787B (en) * | 2014-01-29 | 2016-08-17 | 北方工业大学 | Arc extinguishing method of intrinsically safe inductive circuit |
| CN105743379A (en) * | 2014-12-12 | 2016-07-06 | 中车大连电力牵引研发中心有限公司 | Inverter charging switch and inverter |
| CN105743379B (en) * | 2014-12-12 | 2019-05-24 | 中车大连电力牵引研发中心有限公司 | Inverter charge switch and inverter |
| CN109660117A (en) * | 2018-12-26 | 2019-04-19 | 国网江苏省电力有限公司电力科学研究院 | A kind of electric power electric transformer starting control method |
| CN109660117B (en) * | 2018-12-26 | 2021-06-08 | 国网江苏省电力有限公司电力科学研究院 | Power electronic transformer starting control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHANGHAI HI-TECH CONTROL SYSTEM CO., LTD. Free format text: FORMER OWNER: ZHEJIANG HAIDE NEW ENERGY CO., LTD. Effective date: 20140430 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 314500 JIAXING, ZHEJIANG PROVINCE TO: 201114 MINHANG, SHANGHAI |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20140430 Address after: 201114, No. 777, Chun Chun Road, Shanghai, Minhang District Patentee after: Shanghai Haide Control System Co., Ltd. Address before: 314500 Tongxiang City, Jiaxing Province, near the South Ring Road No. 1320, No. Patentee before: Zhejiang Haide New Energy Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110803 Termination date: 20171202 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |