CN103580464A - Self-protection H bridge driving circuit - Google Patents
Self-protection H bridge driving circuit Download PDFInfo
- Publication number
- CN103580464A CN103580464A CN201310476158.1A CN201310476158A CN103580464A CN 103580464 A CN103580464 A CN 103580464A CN 201310476158 A CN201310476158 A CN 201310476158A CN 103580464 A CN103580464 A CN 103580464A
- Authority
- CN
- China
- Prior art keywords
- switch element
- bridge
- driving
- comparator
- self
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Abstract
The invention provides a self-protection H bridge driving circuit. The self-protection H bridge driving circuit comprises an H bridge driving unit and an H bridge driving control unit. Four switch elements are located on diagonal lines, an upper left and lower right driving branch is formed by the switch element of an upper left arm and the switch element of a lower right arm, an upper right and lower left driving branch is formed by the switch element of an upper right arm and the switch element of a lower left arm, and the H bridge driving control unit controls the two driving branches to be connected alternately and controls the direction of a load current; in the same driving branch, one switch element controls output of the load driving current, and the other switch element controls the duty ratio of the load driving current. When one or two switch elements on one driving branch in the H bridge driving unit are connected, the H bridge driving control unit stops the two switch elements on the other driving branch from being connected, and thus the self-protection function is achieved. Because the independent switch elements are adopted by the H bridge driving unit to built the driving circuit, when different loads are driven by the circuit, the switch elements different in driving capacity can be selected according to currents required for driving the loads, and thus the self-protection H bridge driving circuit is high in flexibility.
Description
Technical field
The present invention relates to a kind of H bridge drive circuit.
Technical background
It is because its shape exactly likes alphabetical H that H bridge drive circuit is gained the name in " H bridge drive circuit ".4 switch elements become 4 vertical legs of H, and driven load is exactly the whippletree in H.H bridge drive circuit comprises 4 switch elements and a load.Make loaded work piece, the pair of switches element on the diagonal of conducting simultaneously.The conducting situation right according to different switch elements, electric current may be from left to right or is flow through from right to left load, thus the operating state of control load.For example, as shown in Figure 3, triode Q1, Q2, Q3, Q4 are as 4 switch elements in H bridge drive circuit as shown in the figure, and the load of H bridge drive circuit is motor.When Q1 pipe and the conducting of Q4 pipe, electric current just passes motor from positive source through Q1 from left to right, and then gets back to power cathode through Q4.Thereby drive motors rotates (motor arrow is around designated as clockwise direction) by specific direction.
While driving load, on assurance H bridge, conducting is simultaneously not extremely important for two switch elements of homonymy.As shown in Figure 3, if triode Q1 and Q2 conducting simultaneously, electric current will directly be got back to negative pole through two triodes from positive pole so.Now, in circuit, except triode, there is no other any loads, so the electric current on circuit will reach maximum (this electric current is limited by power source performance only), even burn out triode.For these reasons, in actual drive circuits, conventionally to control easily with hardware circuit the switch of triode.
Common solution mainly contains and adopts the special driving chip of integrated hardware circuit or with discreet logic device, build control circuit and realize, special driving chip is as IR2110, L298N, TLE5209 etc., the weak point of these solutions is that cost compare is high, flexibility is poor, while driving high power load, also need outside high power switch element to coordinate, take PCB area more.Therefore a kind of with self-shield ability, flexibility is high, cost is low H bridge control circuit in the urgent need to designing.
Summary of the invention
The object of the invention is for the deficiencies in the prior art part, provide a kind of with self-shield ability, flexibility is high, cost is low H bridge control circuit.
For achieving the above object, the technical solution adopted in the present invention is: a kind of self-shield H bridge drive circuit, comprise: by two driver output terminals, four H bridge driver element and H bridge driving control unit that switch element forms, it is characterized in that, four switch elements are on diagonal, the switch element of left upper arm and bottom right arm forms bottom right, a upper left and drives branch road, the switch element of right upper arm and lower-left arm forms lower-left, a upper right and drives branch road, above-mentioned two driving branch roads and load drive current direction are controlled by H bridge driving control unit, realize alternate conduction, in same driving branch road, a switch element control load drive current output, another switch element control load drive current duty ratio.H bridge driver element adopts an inverter passage, two comparator passages and four resistance to be built into independently switch element driver circuit, in H bridge driver element, while having one or two switch element conducting on a driving branch road, H bridge driving control unit stops another to drive two switch element conductings on branch road, only have when the conducting simultaneously of two switch elements, load drives loop circuit just to form the path to " driving power-" by " driving power+", realizes load drive current pulse-width modulation (PWM) and controls.
Owing to adopting such scheme, the present invention has the following advantages: H bridge driver element of the present invention adopts independently switch element to build drive circuit, while driving in the face of different loads, can, according to driving the required electric current of load to select the switch element of different driving ability, there is higher flexibility.Build H bridge driving control unit and only need an inverter passage, two comparator passages and four resistance.Because H bridge driving control unit number of devices is few, build simply, so only need less PCB area to realize, further improved the reliability of system and reduced the cost of system.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described.
Fig. 1 is self-shield H bridge driving circuit principle figure of the present invention.
Fig. 2 is H bridge driving control unit schematic diagram of the present invention.
Fig. 3 is the principle schematic of prior art typical case H bridge drive circuit.
In figure: 100 drive duty cycle control signal input, 101 voltage signals, 102 inverter inputs, 103 inverter output, 104 comparator A outputs, 105 comparator B outputs.
Embodiment
Consult Fig. 1.In embodiment described below, described self-shield H bridge drive circuit comprises H bridge driving control unit and H bridge driver element, wherein, H bridge driver element is by two driver output terminals, four switch elements form, four switch elements are on diagonal, the switch element of left upper arm and bottom right arm forms bottom right, a upper left and drives branch road, the switch element of right upper arm and lower-left arm forms lower-left, a upper right and drives branch road, above-mentioned two driving branch roads are controlled by H bridge driving control unit and are realized alternate conduction, the direction of control load drive current, in same driving branch road, a switch element control load drive current output, another switch element control load drive current duty ratio, H bridge driver element adopts an inverter passage, two comparator passages and four resistance to build independently switch element driver circuit, in H bridge driver element, while having one or two switch element conducting on a driving branch road, H bridge driving control unit stops another to drive two switch element conductings on branch road, only have when the conducting simultaneously of two switch elements, load driving circuits just forms the path to " driving power-" by " driving power+", thereby realize load drive current pulse-width modulation (PWM), controls.
Consult Fig. 2.H bridge driving control unit comprises: the comparator passage that comparator A is connected with comparator B forward end and contact are altogether connected in divider resistance R1, the divider resistance R2 of comparator A and comparator B negative end comparator passage mutually, and be connected on successively between comparator A and comparator B backward end, by current-limiting resistance R3 and the current-limiting resistance R4 of inverter positive input and inverse output terminal, it is an inverter passage that current-limiting resistance R3, inverter and current-limiting resistance R4 build respectively.Two current-limiting resistance R3, R4 and inverter are connected between two comparator output terminals.Two comparator passages are connected with four resistance positive inputs, and access driving duty cycle control signal, the connected divider resistance of negative input, divider resistance R1 and divider resistance R2 series connection, and two ends connect respectively power supply VCC and power supply ground.The voltage signal current potential that divider resistance dividing potential drop obtains is between the low and high level of input signal.The resistance of divider resistance R1 and divider resistance R2 is selected according to the comparator model of selecting in side circuit and other circuit parameter.Current-limiting resistance R3 and current-limiting resistance R4 resistance are selected according to the inverter model of selecting in side circuit, comparator model and other circuit parameter.Comparator A is connected with comparator B positive input, connects simultaneously and drives duty cycle control signal input 100; Comparator A is connected with comparator B negative input, the tie point that simultaneously connects divider resistance R1 and divider resistance R2 accesses the voltage signal 101 being obtained from VCC dividing potential drop by divider resistance R1 and divider resistance R2, for identifying the low and high level that drives duty cycle control signal.Comparator A output 104 is by the connected inverter output 103 of current-limiting resistance R3, contact connects lower-left arm switch element controling signal end altogether, inverter input 102 connects left upper arm switch element control signal ends, when the input 102 of inverter is while be high, and the conducting of control left upper arm switch element; Because inverter output signal is low, comparator A output 104 signals pull down to low, and left upper arm switch element control signal and lower-left arm switch element controling signal can not be high simultaneously, guarantee the not conducting simultaneously of two switch elements in H bridge left side.Comparator B output 105 is by the connected inverter input 102 of current-limiting resistance R4, and contact connects bottom right arm switch element controling signal end altogether.The inverter output 103 right upper arm switch element control signal end that is connected, when the output 103 of inverter is while be high, the conducting of control right upper arm switch element.Because inverter input signal is low, comparator B output 105 signals pull down to low, and right upper arm switch element control signal and bottom right arm switch element controling signal can not be high simultaneously, guarantee the not conducting simultaneously of two switch elements on H bridge right side.The input 102 of inverter is connected with left upper arm switch element control signal end, and the output 103 of inverter is connected with right upper arm switch element control signal end.Inverter input and output two ends can not be high simultaneously, so left and right upper arm switching element control signal can not be high simultaneously, guarantee the not conducting simultaneously of upper arm switching element of two branch roads.Article two, the underarm switch element control signal end of driving branch road is connected to inverter input and output two ends by a current-limiting resistance respectively, to guarantee the not conducting simultaneously of underarm switch element of two branch roads.External drive direction control signal is by the input 102 input H bridge driving control unit of inverter, when external drive direction control signal is high level, left upper arm switch element control signal end input high level is controlled the conducting of left upper arm switch element, right upper arm switch element control signal end input low level is controlled right upper arm switch element and is turn-offed, and arm switch element controling signal end input in lower-left is that low level control lower-left arm switch element turn-offs by clamper.External drive duty cycle control signal is by driving duty cycle control signal input 100 input H bridge driving control unit.
According to the control logic of H bridge driving control unit: two switch elements of H bridge driver element homonymy are conducting simultaneously not, the upper arm switching element of two branch roads is conducting simultaneously not, and the underarm switch element of two branch roads is conducting simultaneously.While having one or two switch element conducting on a driving branch road in H bridge driver element, H bridge driving control unit stops another to drive two switch element conductings on branch road, thereby realizes self-protection function.
H bridge drive circuit all working state is as shown in the table.
Claims (10)
1. a self-shield H bridge drive circuit, comprise: by two driver output terminals, four H bridge driver element and H bridge driving control unit that switch element forms, it is characterized in that, four switch elements are on diagonal, the switch element of left upper arm and bottom right arm forms bottom right, a upper left and drives branch road, the switch element of right upper arm and lower-left arm forms lower-left, a upper right and drives branch road, above-mentioned two driving branch roads and load drive current direction are controlled by H bridge driving control unit, realize alternate conduction, in same driving branch road, a switch element control load drive current output, another switch element control load drive current duty ratio.
2. self-shield H bridge drive circuit as claimed in claim 1, it is characterized in that: H bridge driver element adopts an inverter passage, two comparator passages and four resistance are built into independently switch element driver circuit, in H bridge driver element, while having one or two switch element conducting on a driving branch road, H bridge driving control unit stops another to drive two switch element conductings on branch road, only have when the conducting simultaneously of two switch elements, load drives loop circuit just to form the path to " driving power-" by " driving power+", realizing load drive current pulse-width modulation (PWM) controls.
3. self-shield H bridge drive circuit as claimed in claim 1; it is characterized in that: H bridge driving control unit comprises: the comparator passage that comparator A is connected with comparator B forward end and contact are altogether connected in divider resistance R1, the divider resistance R2 of comparator A and comparator B negative end comparator passage mutually; and be connected on successively between comparator A and comparator B backward end; respectively by current-limiting resistance R3 and the current-limiting resistance R4 of inverter positive input and inverse output terminal, the inverter passage that current-limiting resistance R3, inverter and current-limiting resistance R4 build.
4. self-shield H bridge drive circuit as claimed in claim 3, is characterized in that: comparator A is connected with comparator B positive input, connects simultaneously and drives duty cycle control signal input (100); Comparator A is connected with comparator B negative input, the tie point that simultaneously connects divider resistance R1 and divider resistance R2 accesses the voltage signal (101) being obtained from VCC dividing potential drop by divider resistance R1 and divider resistance R2, for identifying the low and high level that drives duty cycle control signal.
5. self-shield H bridge drive circuit as claimed in claim 4; it is characterized in that: comparator A(104) output is by the connected inverter output (103) of current-limiting resistance R3; contact connects lower-left arm switch element controling signal end altogether; inverter input (102) connects left upper arm switch element control signal end; when the input (102) of inverter is while being high, control the conducting of left upper arm switch element.
6. self-shield H bridge drive circuit as claimed in claim 3, is characterized in that: comparator B output (105) is by the connected inverter input (102) of current-limiting resistance R4, and contact connects bottom right arm switch element controling signal end altogether.
7. self-shield H bridge drive circuit as claimed in claim 6, is characterized in that: inverter output (103) the right upper arm switch element control signal end that is connected, when the output (103) of inverter is while being high, control the conducting of right upper arm switch element.
8. self-shield H bridge drive circuit as claimed in claim 5, is characterized in that: the input of inverter (102) is connected with left upper arm switch element control signal end, and the output of inverter (103) is connected with right upper arm switch element control signal end.
9. self-shield H bridge drive circuit as claimed in claim 8; it is characterized in that: external drive direction control signal is by input (102) the input H bridge driving control unit of inverter; when external drive direction control signal is high level; left upper arm switch element control signal end input high level is controlled the conducting of left upper arm switch element; right upper arm switch element control signal end input low level is controlled right upper arm switch element and is turn-offed, and arm switch element controling signal end input in lower-left is that low level control lower-left arm switch element turn-offs by clamper.
10. self-shield H bridge drive circuit as claimed in claim 1; it is characterized in that: while having one or two switch element conducting on a driving branch road in H bridge driver element; H bridge driving control unit stops another to drive two switch element conductings on branch road, realizes self-protection function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310476158.1A CN103580464B (en) | 2013-10-13 | 2013-10-13 | Self-protection H bridge drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310476158.1A CN103580464B (en) | 2013-10-13 | 2013-10-13 | Self-protection H bridge drive circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103580464A true CN103580464A (en) | 2014-02-12 |
| CN103580464B CN103580464B (en) | 2015-10-28 |
Family
ID=50051591
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310476158.1A Active CN103580464B (en) | 2013-10-13 | 2013-10-13 | Self-protection H bridge drive circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103580464B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106803729A (en) * | 2015-11-26 | 2017-06-06 | 国家电网公司 | Self-shield direct current motor drive circuit and direct current drive twist grinding machine |
| CN109656282A (en) * | 2017-10-11 | 2019-04-19 | 湖南中部芯谷科技有限公司 | A kind of optical fibre gyro thermoelectric cooling driver |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0160896A2 (en) * | 1984-05-10 | 1985-11-13 | Kabushiki Kaisha Toshiba | Current flow reversing circuit |
| US6664750B2 (en) * | 2002-03-13 | 2003-12-16 | Pelko Electric (Hk) Ltd. | D.C. motor bridge coil driver |
| CN201282438Y (en) * | 2008-09-26 | 2009-07-29 | 耿乐 | H bridge DC motor drive circuit |
| CN202261207U (en) * | 2011-10-11 | 2012-05-30 | 中国电子科技集团公司第五十八研究所 | High-speed complementary switch drive circuit with dead zone enhanced protection |
| CN102570970A (en) * | 2012-01-18 | 2012-07-11 | 成都启臣微电子有限公司 | H bridge motor driver and motor equipment |
| CN202586764U (en) * | 2012-03-05 | 2012-12-05 | 绍兴光大芯业微电子有限公司 | H bridge output circuit driven by motor |
-
2013
- 2013-10-13 CN CN201310476158.1A patent/CN103580464B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0160896A2 (en) * | 1984-05-10 | 1985-11-13 | Kabushiki Kaisha Toshiba | Current flow reversing circuit |
| US6664750B2 (en) * | 2002-03-13 | 2003-12-16 | Pelko Electric (Hk) Ltd. | D.C. motor bridge coil driver |
| CN201282438Y (en) * | 2008-09-26 | 2009-07-29 | 耿乐 | H bridge DC motor drive circuit |
| CN202261207U (en) * | 2011-10-11 | 2012-05-30 | 中国电子科技集团公司第五十八研究所 | High-speed complementary switch drive circuit with dead zone enhanced protection |
| CN102570970A (en) * | 2012-01-18 | 2012-07-11 | 成都启臣微电子有限公司 | H bridge motor driver and motor equipment |
| CN202586764U (en) * | 2012-03-05 | 2012-12-05 | 绍兴光大芯业微电子有限公司 | H bridge output circuit driven by motor |
Non-Patent Citations (1)
| Title |
|---|
| 黄子涵: "一种基于H桥的功率驱动芯片的设计与仿真", 《中国优秀硕士学位论文全文数据库 信息科技辑》, vol. 2013, no. 7, 15 July 2013 (2013-07-15), pages 135 - 365 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106803729A (en) * | 2015-11-26 | 2017-06-06 | 国家电网公司 | Self-shield direct current motor drive circuit and direct current drive twist grinding machine |
| CN109656282A (en) * | 2017-10-11 | 2019-04-19 | 湖南中部芯谷科技有限公司 | A kind of optical fibre gyro thermoelectric cooling driver |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103580464B (en) | 2015-10-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108400721B (en) | Electric drive, grid drive and inverter for a vehicle | |
| EP3314656B1 (en) | Physical topology for a power converter | |
| JP2018011404A (en) | Drive circuit for switch to be driven | |
| CN202586329U (en) | Self-discharge circuit | |
| CN103138554B (en) | Upper half-bridge and lower half-bridge driving interlocking method of brushless direct current motor driver | |
| CN106464122A (en) | Gate driver controlling a collector to emitter voltage variation of an electronic switch and circuits including the gate driver | |
| CN204131481U (en) | The low-loss high speed push-pull driver circuit of low cost | |
| CN102780384A (en) | High-performance low-cost IGBT (Insulated Gate Bipolar Translator) negative pressure bootstrap drive circuit | |
| CN102946205A (en) | Three-level inverter and power supply equipment | |
| CN102780199A (en) | Overcurrent protection circuit and lamp | |
| CN102437771A (en) | Passive discharging circuit of inverter input terminal | |
| JP2017200291A (en) | Electronic circuit | |
| CN103580464B (en) | Self-protection H bridge drive circuit | |
| CN102611343B (en) | Three-level inverter | |
| JP6769350B2 (en) | Semiconductor switch drive | |
| CN206524334U (en) | A kind of multistage pressure high current Darlington transistor | |
| CN104283537A (en) | Power semiconductor circuit | |
| CN105576816A (en) | Switching circuit | |
| CN201956958U (en) | H bridge driving circuit of DC motor | |
| CN104521122A (en) | Inverter drive circuit | |
| CN208241591U (en) | A kind of novel double electrical level inverters using thyristor and IGBT | |
| CN103138618A (en) | Novel power unit module applicable to modularized multi-level current converter | |
| CN203193501U (en) | Upper-lower half-bridge driving interlocking device of DC brushless motor driver | |
| US20140091738A1 (en) | Inverter Circuit having Switching Means Operating with Linear Operation | |
| CN104124949A (en) | Bootstrap circuit, inverter and air conditioner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |