CN103427616A - Large-size frequency converter and electrifying buffer circuit on control power supply of large-size frequency converter - Google Patents
Large-size frequency converter and electrifying buffer circuit on control power supply of large-size frequency converter Download PDFInfo
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- CN103427616A CN103427616A CN2013103812232A CN201310381223A CN103427616A CN 103427616 A CN103427616 A CN 103427616A CN 2013103812232 A CN2013103812232 A CN 2013103812232A CN 201310381223 A CN201310381223 A CN 201310381223A CN 103427616 A CN103427616 A CN 103427616A
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Abstract
The invention provides a large-size frequency converter which comprises a control power supply. The control power supply supplies power to a load through a positive direct-current bus and a negative direct-current bus which are connected between a rectifier bridge and the load. The control power supply comprises an electrifying buffer circuit. The electrifying buffer circuit comprises a first capacitor, a buffer resistor, a second capacitor and a diode. The first capacitor is a uF-level small-capacity capacitor, and the first capacitor is connected between the positive direct-current bus and the negative direct-current bus. The second capacitor is an mF-level large-capacity capacitor, and the buffer resistor and the second capacitor are connected between the positive direct-current bus and the negative direct-current bus in series. The anode of the diode is connected to the connection point of the second capacitor and the buffer resistor, and the cathode of the diode is connected to the positive direct-current bus. The invention further provides the corresponding electrifying buffer circuit. According to the large-size frequency converter and the corresponding electrifying buffer circuit, through the small-capacity capacitor and the large-capacity capacitor which are connected in parallel, both safe and quick charge and power-down protection can be achieved.
Description
Technical field
The present invention relates to the frequency converter field, more particularly, relate to the buffer circuit that powers on of a kind of large-size variable-frequency device and control power supply thereof.
Background technology
In the large-size variable-frequency device, need to be to control veneer etc. to provide stable, reliable low-voltage DC (such as 5V, 12V etc.) by controlling power supply, to guarantee to control the veneer steady operation.For the large electric current of avoiding powered on moment for example, impacts load (controlling veneer), these are controlled in power supply has the buffer circuit of powering on mostly.
As shown in Figure 1, the current buffer circuit that powers on is mainly by relay K 1 and buffering resistance R 1 realization in parallel.In this buffer circuit that powers on, when just starting to power on, by buffer resistance R1, be capacitor C 1 charging, when capacitor C 1 voltage acquires a certain degree, the load R power supply that closing relay K1 is back.Yet, in this powers on buffer circuit, the closure of relay K 1 need to be controlled, realize trouble; Simultaneously, this circuit can not be load supplying after powering at once, need to capacitor charging, after certain degree or relay closes, could be load supplying by buffer resistance.
In addition, as shown in Figure 2, also can belong to thermistor by NTC(NTC, temperature is higher, and the resistance presented is less) buffering is powered on.When just starting to power on, the resistance value of NTC is larger, thereby has limited impulse current; NTC self-heating in the process for the NTC charging, its resistance value slowly is decreased to stable state, now can be load R power supply.Yet, NTC be subject to temperature and while powering on the peak value of input voltage affect larger, cause the impulse current of NTC unstable, thereby cause the reliability deficiency of NTC itself.
Summary of the invention
The technical problem to be solved in the present invention is, realizes the problem of trouble and reliability deficiency for the above-mentioned buffer circuit that powers on, and the buffer circuit that powers on of a kind of large-size variable-frequency device and control power supply thereof is provided.
The technical scheme that the present invention solves the problems of the technologies described above is, provide and comprise that control power supply and this control power supply are load supplying by positive direct-current bus and the negative DC bus be connected between rectifier bridge and load, described control power supply comprises that power on buffer circuit and this buffer circuit that powers on comprise the first electric capacity, buffer resistance, the second electric capacity and diode, and wherein: described the first electric capacity is that uF level low capacity electric capacity and this first electric capacity are connected between positive direct-current bus and negative DC bus; The large bulk capacitance that described the second electric capacity is the mF level and described buffer resistance and this second capacitances in series are connected between positive direct-current bus and negative DC bus; The anodic bonding of described diode is connected to the positive direct-current bus at tie point, the negative pole of the second electric capacity and buffer resistance.
In large-size variable-frequency device of the present invention, described load is for controlling veneer.
In large-size variable-frequency device of the present invention, the output voltage of described rectifier when 110V AC inputs is that 155V, the output voltage when 220V AC inputs are 310V.
The present invention also provides a kind of large-size variable-frequency device to control the buffer circuit that powers on of power supply, described control power supply is load supplying by positive direct-current bus and the negative DC bus be connected between rectifier bridge and load, the described buffer circuit that powers on comprises the first electric capacity, buffer resistance, the second electric capacity and diode, and wherein: described the first electric capacity is that uF level low capacity electric capacity and this first electric capacity are connected between positive direct-current bus and negative DC bus; The large bulk capacitance that described the second electric capacity is the mF level and described buffer resistance and this second capacitances in series are connected between positive direct-current bus and negative DC bus; The anodic bonding of described diode is connected to the positive direct-current bus at tie point, the negative pole of the second electric capacity and buffer resistance.
The buffer circuit that powers on of large-size variable-frequency device of the present invention and control power supply thereof; the first electric capacity by low capacity is load supplying at the initial stage of powering on, is jumbo the second capacitor charging by buffer resistance simultaneously; and when the input power down; jumbo the second electric capacity is that load maintains power supply by diode, thereby realizes power-down protection.
The accompanying drawing explanation
Fig. 1 is the schematic diagram of the existing buffer circuit that powers on.
Fig. 2 is the schematic diagram of another existing buffer circuit that powers on.
Fig. 3 is the schematic diagram that large-size variable-frequency device of the present invention is controlled the buffer circuit embodiment that powers on of power supply.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
As shown in Figure 3, be the schematic diagram that large-size variable-frequency device of the present invention is controlled the buffer circuit embodiment that powers on of power supply, wherein above-mentioned large-size variable-frequency device control power supply is load R power supply by positive direct-current bus and the negative DC bus be connected between rectifier bridge and load R.The buffer circuit that powers in the present embodiment comprises the first capacitor C 1, buffer resistance R1, the second capacitor C 2 and diode D, and wherein the first capacitor C 1 is connected between positive direct-current bus and negative DC bus for uF level low capacity electric capacity and this first capacitor C 1; The second capacitor C 2 is connected in series in (buffer resistance R1 is connected the positive direct-current bus) between positive direct-current bus and negative DC bus for the large bulk capacitance of mF level and buffer resistance R1 with this second capacitor C 2; The anodic bonding of diode D is connected to the positive direct-current bus at tie point, the negative pole of the second capacitor C 2 and buffering resistance R 1.
After powering on, after rectifier bridge is done the rectification processing by input power, by positive direct-current bus and negative DC bus, directly give the first capacitor C 1 charging, and simultaneously for being connected to the load R power supply of positive direct-current bus and negative DC bus.Because the capacity of the first capacitor C 1 is less, so the charging current between positive direct-current bus and negative DC bus is also less, has avoided the impact of impulse current on load.
When rectifier is the first capacitor C 1 charging, positive direct-current bus and negative DC bus are the second capacitor C 2 chargings by buffer resistance R1.
When the input power power down, the second capacitor C 2 maintains power supply by diode D to load R, thereby realizes power-down protection.
The buffer circuit that powers on that above-mentioned large-size variable-frequency device is controlled power supply can be applied directly to the large-size variable-frequency device, and this large-size variable-frequency device comprises that control power supply and this control power supply are load supplying by positive direct-current bus and the negative DC bus be connected between rectifier bridge and load.
Above-mentioned control power supply comprises that power on buffer circuit and this buffer circuit that powers on comprise the first electric capacity, buffer resistance, the second electric capacity and diode, and wherein: the first electric capacity is that uF level low capacity electric capacity and this first electric capacity are connected between positive direct-current bus and negative DC bus; The large bulk capacitance that the second electric capacity is the mF level and buffer resistance and this second capacitances in series are connected between positive direct-current bus and negative DC bus; The anodic bonding of diode is connected to the positive direct-current bus at tie point, the negative pole of the second electric capacity and buffer resistance.
In above-mentioned large-size variable-frequency device, the load that is connected to positive direct-current bus and negative DC bus can be for controlling veneer.The control power supply can be above-mentioned control veneer provides direct current, and for example rectifier provides the 155V direct current for controlling veneer, when 220V AC inputs, for controlling veneer, provides the 310V direct current when 110V AC inputs.
The above; be only the present invention's embodiment preferably, but protection scope of the present invention is not limited to this, anyly is familiar with in technical scope that those skilled in the art disclose in the present invention; the variation that can expect easily or replacement, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (4)
1. a large-size variable-frequency device, comprise that control power supply and this control power supply are load supplying by positive direct-current bus and the negative DC bus be connected between rectifier bridge and load, it is characterized in that: described control power supply comprises that power on buffer circuit and this buffer circuit that powers on comprise the first electric capacity, buffer resistance, the second electric capacity and diode, and wherein: described the first electric capacity is that uF level low capacity electric capacity and this first electric capacity are connected between positive direct-current bus and negative DC bus; The large bulk capacitance that described the second electric capacity is the mF level and described buffer resistance and this second capacitances in series are connected between positive direct-current bus and negative DC bus; The anodic bonding of described diode is connected to the positive direct-current bus at tie point, the negative pole of the second electric capacity and buffer resistance.
2. large-size variable-frequency device according to claim 1 is characterized in that: described load is for controlling veneer.
3. large-size variable-frequency device according to claim 1, it is characterized in that: the output voltage of described rectifier when 110V AC inputs is that 155V, the output voltage when 220V AC inputs are 310V.
4. a large-size variable-frequency device is controlled the buffer circuit that powers on of power supply, described control power supply is load supplying by positive direct-current bus and the negative DC bus be connected between rectifier bridge and load, it is characterized in that: the described buffer circuit that powers on comprises the first electric capacity, buffer resistance, the second electric capacity and diode, and wherein: described the first electric capacity is that uF level low capacity electric capacity and this first electric capacity are connected between positive direct-current bus and negative DC bus; The large bulk capacitance that described the second electric capacity is the mF level and described buffer resistance and this second capacitances in series are connected between positive direct-current bus and negative DC bus; The anodic bonding of described diode is connected to the positive direct-current bus at tie point, the negative pole of the second electric capacity and buffer resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103812232A CN103427616A (en) | 2013-08-28 | 2013-08-28 | Large-size frequency converter and electrifying buffer circuit on control power supply of large-size frequency converter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013103812232A CN103427616A (en) | 2013-08-28 | 2013-08-28 | Large-size frequency converter and electrifying buffer circuit on control power supply of large-size frequency converter |
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| CN103427616A true CN103427616A (en) | 2013-12-04 |
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| CN2013103812232A Pending CN103427616A (en) | 2013-08-28 | 2013-08-28 | Large-size frequency converter and electrifying buffer circuit on control power supply of large-size frequency converter |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105024536A (en) * | 2015-07-10 | 2015-11-04 | 广东美的制冷设备有限公司 | Power supply circuit of inverter power supply and household appliance having same |
| CN106300939A (en) * | 2015-06-03 | 2017-01-04 | 广州汽车集团股份有限公司 | A kind of bus capacitor circuit and vehicle-mounted three phase electric machine inverter |
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| JPH07284272A (en) * | 1994-04-08 | 1995-10-27 | Nichicon Corp | Smoothing circuit |
| US5689409A (en) * | 1994-07-27 | 1997-11-18 | Deutsche Thomson-Brandt Gmbh | Switched-mode power supply |
| CN1240063A (en) * | 1996-12-10 | 1999-12-29 | 松下冷机株式会社 | Power unit |
| CN1535496A (en) * | 2001-07-31 | 2004-10-06 | 汤姆森特许公司 | Switched-mode power supply with damping network |
| CN101877530A (en) * | 2010-03-11 | 2010-11-03 | 荣信电力电子股份有限公司 | Fully-controlled converter injection enhanced gate transistor (IEGT)-based high-capacity H bridge power unit |
| CN202524283U (en) * | 2012-04-11 | 2012-11-07 | 中国矿业大学 | Buffer circuit structure of modular multi-level converter sub-module |
| CN202857064U (en) * | 2012-09-27 | 2013-04-03 | 杭州鸿德照明科技有限公司 | Novel wide-input-voltage LED non-isolated single-chip constant-current drive circuit |
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2013
- 2013-08-28 CN CN2013103812232A patent/CN103427616A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4029221A1 (en) * | 1990-09-14 | 1992-03-19 | Thomson Brandt Gmbh | Switching circuit component e.g. for electronic video equipment - ensures negative-bias availability at base of prim. switching transistor driven by integrated PWM control circuit |
| JPH07284272A (en) * | 1994-04-08 | 1995-10-27 | Nichicon Corp | Smoothing circuit |
| US5689409A (en) * | 1994-07-27 | 1997-11-18 | Deutsche Thomson-Brandt Gmbh | Switched-mode power supply |
| CN1240063A (en) * | 1996-12-10 | 1999-12-29 | 松下冷机株式会社 | Power unit |
| CN1535496A (en) * | 2001-07-31 | 2004-10-06 | 汤姆森特许公司 | Switched-mode power supply with damping network |
| CN101877530A (en) * | 2010-03-11 | 2010-11-03 | 荣信电力电子股份有限公司 | Fully-controlled converter injection enhanced gate transistor (IEGT)-based high-capacity H bridge power unit |
| CN202524283U (en) * | 2012-04-11 | 2012-11-07 | 中国矿业大学 | Buffer circuit structure of modular multi-level converter sub-module |
| CN202857064U (en) * | 2012-09-27 | 2013-04-03 | 杭州鸿德照明科技有限公司 | Novel wide-input-voltage LED non-isolated single-chip constant-current drive circuit |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106300939A (en) * | 2015-06-03 | 2017-01-04 | 广州汽车集团股份有限公司 | A kind of bus capacitor circuit and vehicle-mounted three phase electric machine inverter |
| CN106300939B (en) * | 2015-06-03 | 2019-04-02 | 广州汽车集团股份有限公司 | A kind of bus capacitor circuit and vehicle-mounted three-phase motor inverter |
| CN105024536A (en) * | 2015-07-10 | 2015-11-04 | 广东美的制冷设备有限公司 | Power supply circuit of inverter power supply and household appliance having same |
| CN105024536B (en) * | 2015-07-10 | 2018-01-02 | 广东美的制冷设备有限公司 | The power supply circuit of inverter and there are its household electrical appliance |
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Effective date of registration: 20160224 Address after: Wuzhong District Wuzhong Economic Development Zone, Suzhou City, Jiangsu province 215000 Wang Xiang Shan Industrial Park Road on the north side of friends Applicant after: Suzhou Huichuan Technology Co.,Ltd. Applicant after: Shenzhen Inovance Technology Co., Ltd. Address before: Wuzhong District Wuzhong Economic Development Zone, Suzhou City, Jiangsu province 215000 Wang Xiang Shan Industrial Park Road on the north side of friends Applicant before: Suzhou Huichuan Technology Co.,Ltd. Applicant before: Suzhou Monarch Control Technology Co., Ltd. Applicant before: Shenzhen Inovance Technology Co., Ltd. |
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Application publication date: 20131204 |
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