CN2494571Y - High-frequency switch power source current equalizing device - Google Patents
High-frequency switch power source current equalizing device Download PDFInfo
- Publication number
- CN2494571Y CN2494571Y CN 00253319 CN00253319U CN2494571Y CN 2494571 Y CN2494571 Y CN 2494571Y CN 00253319 CN00253319 CN 00253319 CN 00253319 U CN00253319 U CN 00253319U CN 2494571 Y CN2494571 Y CN 2494571Y
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- resistance
- current
- comparison amplifier
- relay
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Abstract
The utility model discloses a high-frequency switch power source current equalizing device with the advantages of low cost and easy apparatus part purchasing. When the power source goes wrong or has no output, the device cuts off the connection between a current equalizing generatrix and other high-frequency switch power source current equalizing circuits and prevents the influence on other high-frequency switch power source. The utility model feeds a current feedback signal in a positive terminal of the current equalizing generatrix to form a current equalizing generatrix voltage to reflect the current size, carries through proportional-integral calculation on the voltage signal of the positive terminal of the current equalizing generatrix and the current feedback signal of a local machine and forms a current equalizing adjusting signal. The current equalizing generatrix is cut off or connected by a relay and a control end is arranged to control the connection or cutting off of the relay.
Description
The device of the mean allocation electric current when the utility model belongs to many high frequency switch powers and connects work
As everyone knows, when many high frequency switch powers carry out the parallel connection use, need their mean allocation electric currents.Often adopt two kinds of methods: a kind of is the software current-sharing, and another kind is the hardware current-sharing for this reason.And hardware flow equalizing circuit wherein mainly is to be the circuit structure of representative with special-purpose current-sharing chip UC3907 and UC3902, but that their price all compares is expensive, and is subject to the influence of source of goods shortage, and this will bring very big inconvenience to production.
The utility model purpose is to adopt general operational amplifier to design a kind of high frequency switch power current equalizer.Not only with low cost, and components and parts are very easy to buy.When a certain high frequency switch power fault or when not exporting, this flow equalizing circuit ends V1, J1 opens, cut off this high frequency switch power on current equalizing bus bar with the getting in touch of other high frequency switch power flow equalizing circuit, thereby prevented influence to other high frequency switch power.
In order to achieve the above object, on the one hand with current feedback signal feed-in current equalizing bus bar+end, form current equalizing bus bar voltage, react the size of this high frequency switch power electric current with this, on the other hand the current feedback signal of the voltage signal of current equalizing bus bar+end and this machine is carried out the proportional integral computing, and form current-sharing adjustment signal, thereby control the increase or the minimizing of this high frequency switch power output current.Increase a relay and cut off or connect current equalizing bus bar, and establish the on-off that a control end removes control relay.The current feedback signal of high frequency electric source is connected to the anode of comparison amplifier V1A by resistance R 15.The output that the negative terminal of V1A meets comparison amplifier V1A 1 is connected in shared current equalizing bus bar positive pole through resistance R 4 to relay R 4 to relay J.The comparison amplifier output is connected to the anode of comparison amplifier V1C through resistance R 5.Relay J 1C connects the anode of comparison amplifier V1B through resistance R 3, and comparison amplifier V1B, V1C are in identical operation ratio state.Resistance R 6, R7, R8 and diode D3, D2 are its peripheral cell, and comparison amplifier V1B, the output of V1C are respectively through resistance R 9, and R10 is connected to two inputs of comparison amplifier V1D.Wherein comparison amplifier V1B is connected to the anode of V1C.The output of comparison amplifier V1D is connected to the current-sharing adjustment through resistance R 14.Wherein resistance R 12, and relay J 1 drive circuit is to be connected control end by base stage through resistance R 1 between the negative input end that capacitor C 1 and C2 and resistance R 13 series circuits are connected to V1D mutually and the output.Its output load is relay J 1 actuating coil, and diode D1 and relay actuating coil also connect.The negative wire ground connection of another contact control current equalizing bus bar of relay.
Fig. 1 is the utility model embodiment circuit diagram
As shown in Figure 1, just constituted the flow equalizing circuit of high frequency switch power by the general integrated operational amplifier circuit of a slice and some resistance capacitances etc.Wherein current feedback signal is on the one hand through R15, U1A, and R4, J1 have been sent to the current equalizing bus bar positive pole, and on the other hand again through R15, U1A, R5 have been sent to U1C and have carried out scale operation, and then send the negative terminal of U1D to.When many high frequency switch power parallel connections made, the current equalizing bus bar positive pole all should be linked together, and the current equalizing bus bar negative pole also should be linked together.When the output current of other high frequency switch power is higher than this electromechanics stream, the voltage of resistance R 4 upper ends will be than the voltage height of lower end, so this higher current equalizing bus bar voltage will be by J1, R3 is sent to U1B and carries out scale operation, and then send into the anode of U1D, carry out the proportional integral computing with the signal of negative terminal.Because the computing ratio of U1B and U1C is identical, thus the anode of U1D than negative terminal voltage height, this makes the output voltage of U1D rise, and carries out the current-sharing adjustment by R14, makes the increase of this machine output current.On the contrary, when the output current of other high frequency switch power is lower than this electromechanics stream, the voltage of resistance R 4 upper ends will be lower than the voltage of lower end, and this will make the output voltage of U1D to reduce, thereby this machine of adjustment output current descends.Like this, finally all high frequency switch powers that use in parallel will be tending towards a certain point of safes, and electric current is mean allocation, that is: current-sharing work.In use in parallel, when a certain high frequency switch power fault or when not exporting, the control end of this flow equalizing circuit will be gone into low level by value, thereby V1 is ended, J1 opens, so just cut off this high frequency switch power on current equalizing bus bar with the getting in touch of other high frequency switch power flow equalizing circuit, thereby prevented influence to other high frequency switch power.
Claims (1)
1. high frequency switch power current equalizer, constitute by the general integrated operational amplifier circuit of a slice and some resistance capacitances, the current feedback signal of high frequency electric source is connected to the anode of comparison amplifier V1A by resistance R 15, the output that the negative terminal of comparison amplifier V1A meets comparison amplifier V1A through resistance R 4 to relay J 1 to the current equalizing bus bar positive pole; The output of comparison amplifier V1A is connected to the anode of comparison amplifier V1C through resistance R 5; Relay J 1C connects the anode of comparison amplifier V1B through resistance R 3, and comparison amplifier V1B, V1C are in identical operation ratio state; Resistance R 6, R7, R8 and diode D3, D2 are its peripheral cell, and comparison amplifier V1B, the output of V1C are respectively through resistance R 9, and R10 is connected to two inputs of comparison amplifier V1D; Wherein comparison amplifier V1B is connected to the anode of V1C, the output of comparison amplifier V1D is connected to the current-sharing adjustment through resistance R 14, wherein resistance R 12, and relay J 1 drive circuit is to be connected control end by base stage through resistance R 1 between the negative input end that capacitor C 1 and C2 and resistance R 13 series circuits are connected to V1D mutually and the output; Its output load is relay J 1 actuating coil, and diode D1 and relay actuating coil also connect, the negative wire ground connection of another contact control current equalizing bus bar of relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00253319 CN2494571Y (en) | 2000-12-05 | 2000-12-05 | High-frequency switch power source current equalizing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00253319 CN2494571Y (en) | 2000-12-05 | 2000-12-05 | High-frequency switch power source current equalizing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2494571Y true CN2494571Y (en) | 2002-06-05 |
Family
ID=33610791
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00253319 Expired - Lifetime CN2494571Y (en) | 2000-12-05 | 2000-12-05 | High-frequency switch power source current equalizing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2494571Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100379112C (en) * | 2005-07-07 | 2008-04-02 | 艾默生网络能源有限公司 | Average current type current-equalizing circuit and its formed power supply and power supply system |
| CN103441491A (en) * | 2013-07-03 | 2013-12-11 | 中国船舶重工集团公司第七二四研究所 | Method for achieving paralleled current sharing of high-voltage and high-power source |
-
2000
- 2000-12-05 CN CN 00253319 patent/CN2494571Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100379112C (en) * | 2005-07-07 | 2008-04-02 | 艾默生网络能源有限公司 | Average current type current-equalizing circuit and its formed power supply and power supply system |
| CN103441491A (en) * | 2013-07-03 | 2013-12-11 | 中国船舶重工集团公司第七二四研究所 | Method for achieving paralleled current sharing of high-voltage and high-power source |
| CN103441491B (en) * | 2013-07-03 | 2016-01-20 | 中国船舶重工集团公司第七二四研究所 | The implementation method of a kind of high voltage, large power supply parallel current-sharing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20101205 Granted publication date: 20020605 |