CN201478810U - Zero-impact current soft start circuit - Google Patents
Zero-impact current soft start circuit Download PDFInfo
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- CN201478810U CN201478810U CN2009201546192U CN200920154619U CN201478810U CN 201478810 U CN201478810 U CN 201478810U CN 2009201546192 U CN2009201546192 U CN 2009201546192U CN 200920154619 U CN200920154619 U CN 200920154619U CN 201478810 U CN201478810 U CN 201478810U
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- inductance
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Abstract
The utility model relates to a soft start circuit capable of realizing the zero impact of the current during the soft start. The utility model provides a zero-impact current soft start circuit, which at least comprises a power supply, a current limiting resistor, a condensive load and a current switching device. The utility model is characterized in that the zero-impact current soft start circuit also comprises an inductor, and the inductor is connected in series with the current limiting resistor. The utility model has a simple structure, and has high practicability.
Description
Technical field
The utility model relates to soft starting circuit, is specifically related to realize the soft starting circuit of zero impulse current.
Background technology
Present soft start policy adopts the mode of resistance current limliting usually, and charging current all exists steeper rank to cross journey, and promptly the charging current gradual slow of not starting from scratch changes, and the rank of this electric current are referred to as impulse current more.Because the existence of impulse current may cause contacting the sparking arcing of moment contact, brings out accidents such as fire easily.
Fig. 1 is traditional soft start-up circuit 1 figure, soft starting circuit mainly is made up of power supply, current-limiting resistance, capacitive load and current switching device, after input current charged to certain voltage value by current-limiting resistance to capacitive load earlier, the current switching device action was with the current-limiting resistance short circuit.Adopt soft starting circuit shown in Figure 1, though there is current-limiting resistance to carry out current limliting, soft start moment, formula is got on the still unexpected rank of electric current to be increased, its uphill process is very steep, owing to there is rush of current in the moment of starting shooting, to late-class circuit life-span and the very big hidden danger of reliability existence.
Fig. 2 is traditional soft start-up circuit 2 figure, and as shown in the figure, soft starting circuit mainly is made up of power supply, hot plug contact, current switching device, current-limiting resistance and capacitive load.This circuit often is used in the plug-and-play circuit, and when the hot plug contact contacted, flow through current switching device and current-limiting resistance of electric current charged to capacitive load, when the voltage of capacitive load is charged to certain voltage value, and the current switching device action, formation is opened circuit.In this soft starting circuit, still there is rush of current in soft start moment, and still there are hidden danger in late-class circuit life-span and reliability.The current switching device can be a hot plug diode in this circuit, needs only conducting when the hot plug diode is satisfied to charge to capacitive load, and the requirement that charging ends after finishing is just passable.
Summary of the invention
The purpose of this utility model provides novel soft starting circuit, realizes the soft start-up process of zero impulse current.The utility model is achieved in that a kind of soft starting circuit of zero impulse current, comprises power supply, current-limiting resistance, capacitive load and current switching device at least, also comprises an inductance, and inductance is connected with current-limiting resistance.Flow through inductance and current-limiting resistance of electric current charges to capacitive load.Current switching device and inductance, current-limiting resistance are in parallel.Inductance and current-limiting resistance can integrate.The action after the capacitive load charging is finished of current switching device is with inductance and current-limiting resistance short circuit.
A kind of soft starting circuit of zero impulse current comprises power supply, hot plug contact, current switching device, current-limiting resistance and capacitive load at least: also comprise an inductance, inductance is connected with current-limiting resistance.Flow through current switching device, inductance and current-limiting resistance of electric current charges to capacitive load.Inductance and current-limiting resistance can integrate.The current switching device is finished the back in capacitive load charging and is moved, and makes electric current can't flow through inductance and current-limiting resistance.
The soft starting circuit that adopts the utility model to provide, simple in structure, zero of electric current impacts in the time of can realizing soft start.
Description of drawings
Fig. 1 traditional soft start-up circuit 1 figure.
Fig. 2 traditional soft start-up circuit 2 figure.
Fig. 3 the utility model soft starting circuit 1 figure.
Fig. 4 the utility model soft starting circuit 2 figure.
Specific embodiment
Below in conjunction with accompanying drawing the utility model is done more detailed description.
Fig. 3 is the utility model soft starting circuit 1 figure.As shown in the figure, present embodiment is compared with traditional soft start-up circuit 1 figure shown in Figure 1, has added an inductance L, inductance and current-limiting resistance series connection.Because the electric current on the inductance can not suddenly change, so starting from scratch, input current slowly increases, the rush of current situation in its circuit has obtained tangible improvement.After capacitive load charged to certain voltage value, the current switching device action was with the current-limiting resistance short circuit.Current-limiting resistance and inductance can also be integrated in the utility model, for example can be with the internal resistance of inductance as current-limiting resistance.
Fig. 4 is the utility model soft starting circuit 2 figure, and as shown in the figure, present embodiment is compared with traditional soft start-up circuit 2 figure shown in Figure 2, has added an inductance L, and inductance is connected with current-limiting resistance.Because the electric current on the inductance can not suddenly change, so starting from scratch, input current slowly increases, the situation of rush of current has obtained tangible improvement in its circuit.After capacitive load charges to certain voltage value, the current switching device action, formation is opened circuit, and makes electric current can't flow through inductance and current-limiting resistance.Current-limiting resistance in this utility model and inductance can integrate, for example can be with the internal resistance of inductance as current-limiting resistance.
Claims (10)
1. the soft starting circuit of one kind zero impulse current comprises power supply, current-limiting resistance, capacitive load and current switching device at least, and it is characterized in that: also comprise an inductance, described inductance is connected with described current-limiting resistance.
2. the soft starting circuit of zero impulse current according to claim 1 is characterized in that: flow through described inductance and described current-limiting resistance of electric current charges to described capacitive load.
3. the soft starting circuit of zero impulse current according to claim 1 is characterized in that: described current switching device and described inductance, described current-limiting resistance are in parallel.
4. the soft starting circuit of zero impulse current according to claim 1, it is characterized in that: described inductance and described current-limiting resistance can integrate.
5. the soft starting circuit of zero impulse current according to claim 1, it is characterized in that: described current switching device is finished the back in described capacitive load charging and is moved, with described inductance and described current-limiting resistance short circuit.
6. the soft starting circuit of one kind zero impulse current comprises power supply, hot plug contact, current switching device, current-limiting resistance and capacitive load at least, and it is characterized in that: also comprise an inductance, described inductance is connected with described current-limiting resistance.
7. as the soft starting circuit of zero impulse current as described in the claim 6, it is characterized in that: flow through described current switching device, described inductance and described current-limiting resistance of electric current charges to described capacitive load.
8. as the soft starting circuit of zero impulse current as described in the claim 6, it is characterized in that: described current switching device is connected with described inductance, described current-limiting resistance.
9. as the soft starting circuit of zero impulse current as described in the claim 6, it is characterized in that: described inductance and described current-limiting resistance can integrate.
10. as the soft starting circuit of zero impulse current as described in the claim 6, it is characterized in that: described current switching device is finished the back in described capacitive load charging and is moved, and makes electric current can't flow through described inductance and described current-limiting resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201546192U CN201478810U (en) | 2009-05-15 | 2009-05-15 | Zero-impact current soft start circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201546192U CN201478810U (en) | 2009-05-15 | 2009-05-15 | Zero-impact current soft start circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201478810U true CN201478810U (en) | 2010-05-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201546192U Expired - Lifetime CN201478810U (en) | 2009-05-15 | 2009-05-15 | Zero-impact current soft start circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN201478810U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103378720A (en) * | 2012-04-27 | 2013-10-30 | 珠海格力电器股份有限公司 | Compressor capacity charge control device and method and compressor |
| CN103414175A (en) * | 2013-07-29 | 2013-11-27 | 西安交通大学 | Short-circuit fault current limiter |
| CN107026436A (en) * | 2017-04-17 | 2017-08-08 | 顺丰科技有限公司 | Electricity is relieved a garrison the functional module of firing circuit, electron speed regulator and high-voltage great-current |
| CN107370132A (en) * | 2017-08-14 | 2017-11-21 | 苏州市博得立电源科技有限公司 | Electric bicycle motor delaying time of controller start-up circuit based on temperature negative-feedback |
-
2009
- 2009-05-15 CN CN2009201546192U patent/CN201478810U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103378720A (en) * | 2012-04-27 | 2013-10-30 | 珠海格力电器股份有限公司 | Compressor capacity charge control device and method and compressor |
| CN103414175A (en) * | 2013-07-29 | 2013-11-27 | 西安交通大学 | Short-circuit fault current limiter |
| CN107026436A (en) * | 2017-04-17 | 2017-08-08 | 顺丰科技有限公司 | Electricity is relieved a garrison the functional module of firing circuit, electron speed regulator and high-voltage great-current |
| CN107370132A (en) * | 2017-08-14 | 2017-11-21 | 苏州市博得立电源科技有限公司 | Electric bicycle motor delaying time of controller start-up circuit based on temperature negative-feedback |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100519 |