CN201294458Y - Bridge type converter capable of preventing bridge arm from direct connection and electronic equipment - Google Patents
Bridge type converter capable of preventing bridge arm from direct connection and electronic equipment Download PDFInfo
- Publication number
- CN201294458Y CN201294458Y CNU2008202121960U CN200820212196U CN201294458Y CN 201294458 Y CN201294458 Y CN 201294458Y CN U2008202121960 U CNU2008202121960 U CN U2008202121960U CN 200820212196 U CN200820212196 U CN 200820212196U CN 201294458 Y CN201294458 Y CN 201294458Y
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- optical coupler
- transistor
- bridge arm
- bridge
- source electrode
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Abstract
The utility model discloses a bridge type converter which can prevent the straight-through of a bridge arm, the bridge type converter comprises a bridge type circuit which is formed from four transistors and is conducted and closed through alternating two groups of diagonal bridge arms. The bridge type converter is characterized by further comprising a bridge arm straight-through limit circuit which is respectively arranged between the two groups of the diagonal bridge arms, is used for identifying the working state of a transistor according to the voltage between the source electrode and the drain of the transistor and generating a control signal which is corresponding to the working state of the transistor to interlock and limit the working state of the diagonal bridge arms, or is respectively arranged between two groups of upper and lower bridge arms, and is used for identifying the working state of the transistor according to the grid electrode voltage of the transistor or the current in a detecting return circuit and generating the control signal which is corresponding to the working state of the transistor to interlock and limit the upper and the lower bridge arms to form the straight-through. The utility model further discloses an electronic device which uses the bridge type converter. The converter has the advantages that the circuit has simple structure and the converter has high reliability, and can effectively prevent the upper and the lower bridge arms to form the straight-through.
Description
Technical field
The utility model relates to bridge conversion circuit, and the operating state that especially relates to a kind of interlocking restriction diagonal angle brachium pontis prevents to form the bridge converter of bridge arm direct pass, and the electronic equipment with this bridge converter.
Background technology
As shown in Figure 1, be the schematic diagram that has the bridge converter of forming by 4 transistors now.Wherein, transistor Q1, Q2, Q3 and Q4 form 4 brachium pontis: transistor Q1 and Q4 are one group of diagonal angle brachium pontis, and transistor Q2 and Q3 are another group diagonal angle brachium pontis; Transistor Q1 and Q3 are one group of upper and lower bridge arm, and transistor Q2 and Q4 are another group upper and lower bridge arm.Bridge converter is when operate as normal, and two groups of mutual alternate conduction of upper and lower bridge arm and ending are converted to specific voltage U 1 with the voltage U of input through transformer T and are power electronic equipment.
Yet,, prevent that upper and lower bridge arm from forming straight-through and burn out the higher transistor of price in order to improve the security performance of bridge converter.The common way of industry is to utilize PWM chip periphery capacitance resistance ware to control the Dead Time of bridge converter, yet when the parameter of capacitance resistance ware changed, it can not effectively be controlled the bridge converter upper and lower bridge arm and form straight-through.
As the applying date be on August 5th, 2004, application number is 200410070508.5, name is called the Chinese patent application of " having the bridge synchronization rectification circuit that Dead Time is adjusted ", it utilizes the synchronous winding of Circuit Fault on Secondary Transformer, signal according to this transformer secondary side output, in order to exporting a pulse signal, and trigger an electronic switch by this pulse signal, the RC unit of arranging in pairs or groups simultaneously, a comparing unit are in order to export a Dead Time signal.But this technical scheme need be utilized devices such as transformer, inductance, makes that control is complicated, and realizes that cost is higher.
The utility model content
The operating state that the purpose of this utility model is to propose a kind of interlocking restriction diagonal angle brachium pontis prevents to form the bridge converter of bridge arm direct pass, and the electronic equipment with this bridge converter, can't effectively prevent to form between the upper and lower bridge arm straight-through technical problem in the present bridge circuit to solve.
For reaching above-mentioned purpose, the utility model discloses a kind of bridge converter that prevents bridge arm direct pass that has, this bridge converter comprises by 4 transistors and forming and two groups of diagonal angle brachium pontis alternate conduction and the bridge circuit that ends, it is characterized in that, also comprise: be arranged at respectively between two groups of diagonal angle brachium pontis, be used for the operating state of coming interlocking restriction diagonal angle brachium pontis according to the transistorized operating state of voltage identification between transistorized source electrode and the drain electrode and the control signal that produces corresponding transistor operating state, perhaps be arranged at respectively between two groups of upper and lower bridge arms, be used for according to transistorized grid voltage or detect the control signal that the loop electric current discerns transistorized operating state and produce corresponding transistor operating state and come interlocking restriction upper and lower bridge arm to form straight-through bridge arm direct pass restriction circuit.
More excellent, described bridge arm direct pass restriction circuit comprises: the first, the 4th optical coupler; The signal emission part of this first, the 4th optical coupler is not serially connected with between the first, the 4th transistorized source electrode and drain electrode of one group of diagonal angle brachium pontis, and the signal receiving part of the first, the 4th optical coupler is attempted by the 4th respectively, between the grid and source electrode of the first transistor, the second, three optical coupler with organize second and third transistorized electrical relation of brachium pontis separately in like manner as above.
More excellent, described bridge arm direct pass restriction circuit comprises: the first, the signal receiving part of the signal emission part of the 4th optical coupler second, third optical coupler in parallel, and all be connected between the first, the 4th transistorized grid and source electrode of one group of upper and lower bridge arm; The signal receiving part of the second, the three optical coupler emission part parallel connection first, the 4th optical coupler, and all be connected between second, third transistorized grid and source electrode of one group of upper and lower bridge arm.
More excellent, described bridge arm direct pass restriction circuit comprises: the first, the 3rd optical coupler emission part respectively the crosstalk resistance be attempted by on the inspection leakage resistance of the first, the 3rd transistor source; And its signal receiving part is attempted by respectively between the first, the 3rd transistorized grid and the source electrode; The second, four optical coupler and two, four transistorized electrical relation are in like manner as above.
More excellent, 4 transistors in the described bridge circuit are N transistor npn npn (also referring to MOSFET and IGBT).
The utility model also discloses a kind of above-mentioned electronic equipment with the bridge converter that prevents bridge arm direct pass that uses.
Compared with prior art, the utlity model has following beneficial effect:
The utility model utilizes optical coupler, and both as the detecting element of particular current, voltage, conduct prevented that upper and lower bridge arm from forming straight-through executive component, had the effect of Signal Spacing simultaneously again; Therefore, the utlity model has the high advantage of the simple and reliable property of circuit structure, it is straight-through to prevent effectively that upper and lower bridge arm from forming, and has effectively protected the transistor in the bridge converter.
Description of drawings
Fig. 1 is the circuit diagram that has the bridge converter of being made up of transistor now;
Fig. 2 is the circuit diagram of the utility model first embodiment;
Fig. 3 is the circuit diagram of the utility model second embodiment;
Fig. 4 is the circuit diagram of the utility model the 3rd embodiment.
Embodiment
First embodiment
As shown in Figure 2, in the bridge converter of forming by transistor, come to come interlocking to restrict the operating state of diagonal angle brachium pontis according to transistorized operating state of voltage identification between transistorized source electrode and the drain electrode and the control signal that produces corresponding transistor operating state by increasing by 4 optical couplers.Specific as follows:
Between the source electrode that the signal emission part U1-A of first optical coupler serial connection current-limiting resistance R1 is connected transistor Q1 and the drain electrode, the signal receiving part U1-B of first optical coupler be connected and the grid and source electrode of the transistor Q4 of transistor Q1 formation diagonal angle brachium pontis between; And the signal emission part U4-A of the 4th optical coupler serial connection current-limiting resistance R4 is connected between the source electrode and drain electrode of transistor Q4, and the signal receiving part U4-B of the 4th optical coupler is connected between the grid and source electrode of transistor Q1.Form between the transistor Q2 of diagonal angle brachium pontis and the Q3 in another group with the same manner second optical coupler (being made up of signal emission part U2-A and signal receiving part U2-B) and the 3rd optical coupler (being made up of signal emission part U3-A and signal receiving part U3-B) are set.
The operation principle of circuit shown in Figure 2 is as follows:
When transistor Q1 that forms one group of diagonal angle brachium pontis and Q4 conducting, the transistor Q2 and the Q3 of another group diagonal angle brachium pontis end.When transistor Q1 and Q4 conducting, at this moment, the signal emission part U4-A of the signal emission part U1-A of first optical coupler and the 4th optical coupler is all by transistor Q1 and Q4 short circuit and end; And since the source electrode of transistor Q2 and Q3 with drain between by certain voltage (Vin provides by external power source), so make the signal emission part U3-A conducting of signal emission part U2-A and the 3rd optical coupler of second optical coupler, thereby make the grid voltage of transistor Q2 and Q3 be clamped down on into electronegative potential and remain off mutually, prevent mutual conduction between transistor Q1 and Q3 and transistor Q2 and the Q4 and form straight-through purpose thereby reached.
Second embodiment
As shown in Figure 3.Optical coupler is to come interlocking restriction upper and lower bridge arm to form straight-through according to the control signal that transistorized grid voltage is discerned transistorized operating state and produced corresponding transistor operating state.Specific as follows:
Hand between the transistor Q1 and Q3, transistor Q2 and Q4 of arm all following connection optical coupler up and down in formation.Be connected to example explanation with transistor Q1 and Q3 and optical coupler.The signal receiving part U3-B of the 3rd optical coupler in parallel behind the signal emission part U1-A serial connection current-limiting resistance R1 of first optical coupler, and all be connected between the grid and source electrode of transistor Q1; And the signal receiving part U1-B of first optical coupler in parallel behind the signal emission part U3-A of the 3rd optical coupler serial connection current-limiting resistance R3, and all be connected between the grid and source electrode of transistor Q3.
When transistor Q1 that forms one group of diagonal angle brachium pontis and Q4 conducting, transistor Q2 and Q3 that another group forms the diagonal angle brachium pontis end.At this moment, the grid-control voltage of transistor Q1 is a high potential, makes the signal emission part U1-A conducting of first optical coupler, thus also conducting and make the grid voltage of transistor Q3 keep electronegative potential of the signal receiving part U1-B of first optical coupler.In like manner, during transistor Q4 conducting, transistor Q2 keeps definitely ending; Vice versa; Thereby reached and prevented transistor Q1 and Q3, transistor Q2 and Q4 conducting and form straight-through purpose.
The 3rd embodiment
As shown in Figure 4.Optical coupler is to come interlocking restriction upper and lower bridge arm to form straight-through according to detecting the control signal that electric current in the loop discerns transistorized operating state and produce corresponding transistor operating state.Hand between the transistor Q1 and Q3, transistor Q2 and Q4 of arm all following connection optical coupler up and down in formation.
Be connected to example explanation with transistor Q1 and Q3 and optical coupler: the source electrode of transistor Q1 and Q3 is connected in series inspection leakage resistance R12 and R32 respectively; Inspection leakage resistance R12 behind the signal emission part U1-A serial connection current-limiting resistance R11 of first optical coupler on the parallel transistor Q1 source path, and the signal receiving part U3-B of the 3rd optical coupler is attempted by between the grid and source electrode of transistor Q1; Inspection leakage resistance R32 behind the signal emission part U3-A serial connection current-limiting resistance R31 of the 3rd optical coupler on the source path of parallel transistor Q3, and the signal receiving part U1-B of first optical coupler is attempted by between the grid and source electrode of transistor Q3.
Its operation principle is as follows: when transistor Q1 that forms one group of diagonal angle brachium pontis and Q4 conducting, transistor Q2 and Q3 that another group forms the diagonal angle brachium pontis end.At this moment, electric current produces the signal emission part U1-A conducting that voltages make first optical coupler in resistance R 12 on the source path of transistor Q1, thus the signal receiving part U1-B of first optical coupler also conducting and make the grid voltage of transistor Q3 keep electronegative potential and by.In like manner, the signal emission part U4-A conducting of the 4th optical coupler and make body pipe Q2 grid voltage keep electronegative potential and definitely by; Vice versa; Thereby reached and prevented transistor Q1 and Q3, transistor Q2 and Q4 conducting and form straight-through purpose.
To sum up, the utility model utilizes optical coupler, and both the detecting element as specific electric current, voltage (was not limited to use electric current Amplifier output signal is in order to drive the optical coupler emission part), again as preventing that upper and lower bridge arm from forming straight-through executive component and (not limitting Flow to strengthen the conducting implementation capacity of optical coupler receiving portion in external expansion), have simultaneously the effect that signal is isolated; Therefore, this practicality Novel have a high advantage of the simple and reliable property of circuit structure, and it is straight-through to prevent effectively that upper and lower bridge arm from forming, and effectively protects Protected the transistor in the bridge converter.
Claims (10)
1, a kind of have a bridge converter that prevents bridge arm direct pass, this bridge converter comprises by 4 transistors and forming and two groups of diagonal angle brachium pontis alternate conduction and the bridge circuit that ends, it is characterized in that, also comprise: be arranged at respectively between two groups of diagonal angle brachium pontis, be used for the operating state of coming interlocking restriction diagonal angle brachium pontis according to the transistorized operating state of voltage identification between transistorized source electrode and the drain electrode and the control signal that produces corresponding transistor operating state, perhaps be arranged at respectively between two groups of upper and lower bridge arms, be used for according to transistorized grid voltage or detect the control signal that the loop electric current discerns transistorized operating state and produce corresponding transistor operating state and come interlocking restriction upper and lower bridge arm to form straight-through bridge arm direct pass restriction circuit.
2, according to claim 1 have a bridge converter that prevents bridge arm direct pass, it is characterized in that, described bridge arm direct pass restriction circuit comprises:
First, second optical coupler;
The signal emission part of this first, second optical coupler is not serially connected with between first, second transistorized source electrode and drain electrode of one group of diagonal angle brachium pontis, and the signal receiving part of first, second optical coupler is serially connected in second respectively, between the grid and source electrode of the first transistor.
3, according to claim 1 have a bridge converter that prevents bridge arm direct pass, it is characterized in that, described bridge arm direct pass restriction circuit comprises:
First, second optical coupler;
The signal receiving part of the signal emission part of first optical coupler second optical coupler in parallel, and all be serially connected with between the grid and source electrode of the first transistor of one group of upper and lower bridge arm;
The signal receiving part of the signal emission part of second optical coupler first optical coupler in parallel, and all be serially connected with between the grid and source electrode of transistor seconds of this group upper and lower bridge arm.
4, according to claim 1 have a bridge converter that prevents bridge arm direct pass, it is characterized in that, described bridge arm direct pass restriction circuit comprises:
First, second optical coupler;
Two inspection leakage resistances that are serially connected in first, second transistor source of one group of upper and lower bridge arm respectively;
Inspection leakage resistance on the signal emission part of first optical coupler the first transistor source path in parallel, and the signal receiving part of second optical coupler is serially connected between the grid and source electrode of the first transistor;
Inspection leakage resistance on the signal emission part of second optical coupler transistor seconds source path in parallel, and the signal receiving part of first optical coupler is serially connected between the grid and source electrode of transistor seconds.
5, describedly have a bridge converter that prevents bridge arm direct pass according to claim 2 or 3 or 4, it is characterized in that described bridge arm direct pass restriction circuit comprises: two current-limiting resistances that are connected in series with the signal emission part of first, second optical coupler respectively.
6, according to claim 1 have a bridge converter that prevents bridge arm direct pass, it is characterized in that 4 transistors in the described bridge circuit are the N transistor npn npn.
7, a kind of described electronic equipment of claim 1 that uses with the bridge converter that prevents bridge arm direct pass, wherein, this bridge converter comprises by 4 transistors and forming and two groups of diagonal angle brachium pontis alternate conduction and the bridge circuit that ends, it is characterized in that, this bridge converter also comprises: be arranged at respectively between two groups of diagonal angle brachium pontis, be used for the operating state of coming interlocking restriction diagonal angle brachium pontis according to the transistorized operating state of voltage identification between transistorized source electrode and the drain electrode and the control signal that produces corresponding transistor operating state, perhaps be arranged at respectively between two groups of upper and lower bridge arms, be used for according to transistorized grid voltage or detect the control signal that the loop electric current discerns transistorized operating state and produce corresponding transistor operating state and come interlocking restriction upper and lower bridge arm to form straight-through bridge arm direct pass restriction circuit.
8, electronic equipment according to claim 7 is characterized in that, described bridge arm direct pass restriction circuit comprises:
First, second optical coupler;
The signal emission part of this first, second optical coupler is not serially connected with between first, second transistorized source electrode and drain electrode of one group of diagonal angle brachium pontis, and the signal receiving part of first, second optical coupler is serially connected in second respectively, between the grid and source electrode of the first transistor.
9, electronic equipment according to claim 7 is characterized in that, described bridge arm direct pass restriction circuit comprises:
First, second optical coupler;
The signal receiving part of the signal emission part of first optical coupler second optical coupler in parallel, and all be serially connected with between the grid and source electrode of the first transistor of one group of upper and lower bridge arm;
The signal receiving part of the signal emission part of second optical coupler first optical coupler in parallel, and all be serially connected with between the grid and source electrode of transistor seconds of this group upper and lower bridge arm.
10, electronic equipment according to claim 7 is characterized in that, described bridge arm direct pass restriction circuit comprises:
First, second optical coupler;
Two inspection leakage resistances that are serially connected in first, second transistor source of one group of upper and lower bridge arm respectively;
Inspection leakage resistance on the signal emission part of first optical coupler the first transistor source path in parallel, and the signal receiving part of second optical coupler is serially connected between the grid and source electrode of the first transistor;
Inspection leakage resistance on the signal emission part of second optical coupler transistor seconds source path in parallel, and the signal receiving part of first optical coupler is serially connected between the grid and source electrode of transistor seconds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202121960U CN201294458Y (en) | 2008-09-28 | 2008-09-28 | Bridge type converter capable of preventing bridge arm from direct connection and electronic equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202121960U CN201294458Y (en) | 2008-09-28 | 2008-09-28 | Bridge type converter capable of preventing bridge arm from direct connection and electronic equipment |
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| CN201294458Y true CN201294458Y (en) | 2009-08-19 |
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| CNU2008202121960U Expired - Fee Related CN201294458Y (en) | 2008-09-28 | 2008-09-28 | Bridge type converter capable of preventing bridge arm from direct connection and electronic equipment |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102623963A (en) * | 2011-01-31 | 2012-08-01 | 北京昆兰新能源技术有限公司 | Method and system for protecting switch tube in bridge arm |
| CN102709884A (en) * | 2012-06-01 | 2012-10-03 | 深圳市朗科电器有限公司 | Bridge type LC (inductance capacitance) resonance circuit with overcurrent protection function |
| CN103532362A (en) * | 2012-07-04 | 2014-01-22 | 北京精密机电控制设备研究所 | Safety circuit for preventing power module from driving upper and lower power tubes of bridge arm to be directly connected |
| CN103746577A (en) * | 2013-05-10 | 2014-04-23 | 东风汽车电气有限公司 | Low-rectification loss type optocoupler type automobile generator synchronous rectifier |
| CN103780067A (en) * | 2012-10-23 | 2014-05-07 | 库卡罗伯特有限公司 | Electronic power circuit, electronic machine, and method for checking functionality of electronic power circuit |
| CN105337484A (en) * | 2015-11-25 | 2016-02-17 | 宁波中焱光伏科技有限公司 | Upper and lower bridge arm shoot-through protection circuit of H bridge inverter |
| CN108450051A (en) * | 2015-11-19 | 2018-08-24 | 科巴有限公司 | Electric drive for industrial robot |
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2008
- 2008-09-28 CN CNU2008202121960U patent/CN201294458Y/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102623963A (en) * | 2011-01-31 | 2012-08-01 | 北京昆兰新能源技术有限公司 | Method and system for protecting switch tube in bridge arm |
| CN102623963B (en) * | 2011-01-31 | 2014-09-17 | 北京昆兰新能源技术有限公司 | Method and system for protecting switch tube in bridge arm |
| CN102709884A (en) * | 2012-06-01 | 2012-10-03 | 深圳市朗科电器有限公司 | Bridge type LC (inductance capacitance) resonance circuit with overcurrent protection function |
| CN102709884B (en) * | 2012-06-01 | 2015-01-21 | 深圳市朗科电器有限公司 | Bridge type LC (inductance capacitance) resonance circuit with overcurrent protection function |
| CN103532362A (en) * | 2012-07-04 | 2014-01-22 | 北京精密机电控制设备研究所 | Safety circuit for preventing power module from driving upper and lower power tubes of bridge arm to be directly connected |
| CN103532362B (en) * | 2012-07-04 | 2016-01-27 | 北京精密机电控制设备研究所 | A kind of safety circuit preventing power model from driving brachium pontis lower power tube straight-through |
| CN103780067B (en) * | 2012-10-23 | 2017-08-08 | 库卡罗伯特有限公司 | Power electronic circuit, electric mechanical and the method for detecting power electronic circuit function |
| CN103780067A (en) * | 2012-10-23 | 2014-05-07 | 库卡罗伯特有限公司 | Electronic power circuit, electronic machine, and method for checking functionality of electronic power circuit |
| CN103746577A (en) * | 2013-05-10 | 2014-04-23 | 东风汽车电气有限公司 | Low-rectification loss type optocoupler type automobile generator synchronous rectifier |
| CN103746577B (en) * | 2013-05-10 | 2016-02-03 | 东风汽车电气有限公司 | Low rectifier loss type optical coupling type automobile current generator synchronous rectifier |
| CN108450051A (en) * | 2015-11-19 | 2018-08-24 | 科巴有限公司 | Electric drive for industrial robot |
| CN108450051B (en) * | 2015-11-19 | 2020-07-03 | 科巴有限公司 | Electric drive for an industrial robot |
| CN105337484A (en) * | 2015-11-25 | 2016-02-17 | 宁波中焱光伏科技有限公司 | Upper and lower bridge arm shoot-through protection circuit of H bridge inverter |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090819 Termination date: 20150928 |
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| EXPY | Termination of patent right or utility model |