CN207488418U - A kind of detecting system of H bridges - Google Patents
A kind of detecting system of H bridges Download PDFInfo
- Publication number
- CN207488418U CN207488418U CN201721589004.3U CN201721589004U CN207488418U CN 207488418 U CN207488418 U CN 207488418U CN 201721589004 U CN201721589004 U CN 201721589004U CN 207488418 U CN207488418 U CN 207488418U
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- Prior art keywords
- bridges
- nmos tube
- connect
- current potential
- power cathode
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Abstract
The utility model discloses a kind of detecting systems of H bridges.The utility model provides a kind of detecting system of H bridges, including pulse-generating circuit, the first sampling resistor, the second sampling resistor and current potential comparison circuit, after pulse-generating circuit generates the power cathode end of the first H bridges of pulse input, whether the power cathode end that the first H bridges are detected by current potential comparison circuit is consistent with the current potential at the power cathode end of the 2nd H bridges, to judge the connection status of the first H bridges and the 2nd H bridges, circuit structure is simple and can realize the detection of the connection status of H bridges.
Description
Technical field
The utility model is related to motor drive area, more particularly, to a kind of detecting system of H bridges.
Background technology
In motor driving, motor is driven using H bridges inside driving chip, a stepper motor is driven to need two
A H bridges drive a brush direct current motor to need a H bridge.Now in order to increase driving force of the H bridges to motor, by two H
It is used for driving same motor after bridge parallel connection, so as to increase driving current, the driving force to motor is increased, in such case
Under, delay is generated since signal transmission path is different, two H bridges can be caused to gang up phenomenon so that two H bridges do not have
Effect is together in parallel, and can not realize the normal application in parallel of H bridges, it is therefore desirable to which whether in parallel, and according to detecting if detecting two H bridges
Whether result in parallel is further is handled.
Utility model content
In order to solve the above-mentioned technical problem, the purpose of this utility model is to provide a kind of detecting system of H bridges, for detecting
Whether two H bridges are application in parallel.
Technical solution is used by the utility model：A kind of detecting system of H bridges, the detecting system of the H bridges include
First H bridges, the 2nd H bridges, pulse-generating circuit, the first sampling resistor, the second sampling resistor and current potential comparison circuit, described first
H bridges, the 2nd H bridges are used to driving motor, be it is to be detected whether two H bridges in parallel, the first H bridges, the 2nd H bridges and motor
Connection；The output terminal of the pulse-generating circuit is connect with the power cathode end of the first H bridges, for exporting transient pulse to first
The power cathode end of H bridges；The power cathode end of the first H bridges is grounded by the first sampling resistor, the power supply of the 2nd H bridges
Negative pole end is grounded by the second sampling resistor；The ungrounded end (i.e. the power cathode end of the first H bridges) of first sampling resistor,
The ungrounded end (i.e. the power cathode end of the 2nd H bridges) of second sampling resistor is connect with the input terminal of current potential comparison circuit；It is described
Current potential comparison circuit is used for when transient pulse is input to the power cathode end of the first H bridges, detects the power cathode end of the first H bridges
It is whether consistent with the current potential at the power cathode end of the 2nd H bridges, to judge the connection status of the first H bridges and the 2nd H bridges.
Further, the first H bridges include the first NMOS tube, the second NMOS tube, third NMOS tube and the 4th NMOS tube,
The drain electrode of first NMOS tube, the drain electrode of the second NMOS tube are connect as the power positive end of the first H bridges with positive pole, institute
The source electrode for stating the first NMOS tube is connect with the drain electrode of third NMOS tube, the source electrode of second NMOS tube and the leakage of the 4th NMOS tube
Pole connects, the power cathode end of the source electrode of the third NMOS tube, the source electrode of the 4th NMOS tube as the first H bridges.
Further, the 2nd H bridges include the 5th NMOS tube, the 6th NMOS tube, the 7th NMOS tube and the 8th NMOS tube,
The drain electrode of 5th NMOS tube, the drain electrode of the 6th NMOS tube are connect as the power positive end of the 2nd H bridges with positive pole, institute
The source electrode for stating the 5th NMOS tube is connect with the drain electrode of the 7th NMOS tube, the source electrode of the 6th NMOS tube and the leakage of the 8th NMOS tube
Pole connects, the power cathode end of the source electrode of the 7th NMOS tube, the source electrode of the 8th NMOS tube as the 2nd H bridges.
Further, the current potential comparison circuit includes potential comparator, the ungrounded end of first sampling resistor, the
The ungrounded end of two sampling resistors and the input terminal of potential comparator connect.
Further, the current potential comparison circuit further includes microcontroller, the output terminal and microcontroller of the potential comparator
Input terminal connection.
Further, the current potential comparison circuit further includes testing result prompt unit, the output terminal of the microcontroller with
The input terminal connection of testing result prompt unit.
Further, the testing result prompt unit is indicator light and/or voice-output unit and/or display unit.
The beneficial effects of the utility model are：
A kind of detecting system of H bridges of the utility model, including pulse-generating circuit, the first sampling resistor, the second sampling electricity
Resistance and current potential comparison circuit, it is more electric by current potential after pulse-generating circuit generates the power cathode end of the first H bridges of pulse input
Road detect the first H bridges power cathode end it is whether consistent with the current potential at the power cathode end of the 2nd H bridges, with judge the first H bridges with
The connection status of 2nd H bridges, circuit structure is simple and can realize the connection status detection of two H bridges.
Description of the drawings
Specific embodiment of the present utility model is described further below in conjunction with the accompanying drawings：
Fig. 1 is an a kind of specific embodiment schematic diagram of the detecting system of H bridges of the utility model.
Specific embodiment
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the application can phase
Mutually combination.
A kind of detecting system of H bridges, with reference to figure 1, Fig. 1 is an a kind of specific reality of detecting system of H bridges of the utility model
It applies illustration to be intended to, the detecting system of H bridges includes the first H bridges, the 2nd H bridges, pulse-generating circuit (not shown), the first sampling resistor
R1, the second sampling resistor R2 and current potential comparison circuit, the first H bridges and the 2nd H bridges are opposite concept, in the present embodiment, the first H
Bridge is A, and the 2nd H bridges are B, and the first H bridges A, the 2nd H bridges B are used to driving motor, be it is to be detected whether two H bridges in parallel, the
One H bridges, the 2nd H bridges are connect with motor；The output terminal of pulse-generating circuit is connect with the power cathode end of the first H bridges A, for defeated
Go out transient pulse to the power cathode end of the first H bridges A；The power cathode end of first H bridges A is grounded by the first sampling resistor R1,
The power cathode end of 2nd H bridges B is grounded by the second sampling resistor R2；Ungrounded end (i.e. the first H bridges of first sampling resistor R1
Power cathode end), the ungrounded end (i.e. the power cathode end of the 2nd H bridges) of the second sampling resistor R2 and current potential comparison circuit
Input terminal connects；Current potential comparison circuit is used for when transient pulse is input to the power cathode end of the first H bridges A, detects the first H bridges
Whether the power cathode end of A is consistent with the current potential at the power cathode end of the 2nd H bridges B, to judge the first H bridges A's and the 2nd H bridges B
Connection status.Wherein, transient pulse be input to the 2nd H bridges B power cathode end it is also feasible, in the present embodiment, transient pulse is defeated
Enter to the power cathode end of the 2nd H bridges B, and current potential comparison circuit detects the power cathode end (i.e. A1 points) and second of the first H bridges A
The current potential at the power cathode end (i.e. B1 points) of H bridges B is to judge the connection status of the first H bridges A and the 2nd H bridges B.
In the utility model, a kind of detecting system of H bridges is adopted including the first H bridges, the 2nd H bridges, pulse-generating circuit, first
Sample resistance, the second sampling resistor and current potential comparison circuit；Pulse-generating circuit is used to export transient pulse to the power supply of the first H bridges
Negative pole end, current potential comparison circuit are used for when transient pulse is input to the power cathode end of the first H bridges, detect the electricity of the first H bridges
Whether the current potential at the power cathode end of source negative pole end and the 2nd H bridges is consistent, to judge the connection status of the first H bridges and the 2nd H bridges,
When the current potential at the power cathode end of the first H bridges and the power cathode end of the 2nd H bridges is equal, the output of current potential comparison circuit is height,
First H bridges and the 2nd H bridges are applications in parallel, and the motor of the first H bridges and the driving of the 2nd H bridges is same motor；The electricity of first H bridges
When the current potential at the power cathode end of source negative pole end and the 2nd H bridges is unequal, the output of current potential comparison circuit is low, the first H bridges and the
The non-application in parallel of two H bridges, the utility model, which not only realizes, to be detected two the in parallel of H bridges, but also the structure letter of detecting system
It is single.
As being further improved for technical solution, with reference to figure 1, the first H bridges A includes the first NMOS tube Q1, the second NMOS tube
Q2, third NMOS tube Q3 and the 4th NMOS tube Q4, the drain electrode of the first NMOS tube Q1, the drain electrode of the second NMOS tube Q2 are as the first H
The power positive end of bridge A is connect with positive pole Vm, and the source electrode of the first NMOS tube Q1 is connect with the drain electrode of third NMOS tube Q3, the
The source electrode of two NMOS tube Q2 is connect with the drain electrode of the 4th NMOS tube Q4, the source electrode of third NMOS tube Q3, the source of the 4th NMOS tube Q4
Power cathode end of the pole as the first H bridges A；
2nd H bridges B include the 5th NMOS tube Q5, the 6th NMOS tube Q6, the 7th NMOS tube Q7 and the 8th NMOS tube Q8, the 5th
The drain electrode of NMOS tube Q5, the drain electrode of the 6th NMOS tube Q6 are connect as the power positive end of the 2nd H bridges B with positive pole Vm, the
The source electrode of five NMOS tube Q5 is connect with the drain electrode of the 7th NMOS tube Q7, the leakage of the source electrode and the 8th NMOS tube Q8 of the 6th NMOS tube Q6
Pole connects, the power cathode end of the source electrode of the 7th NMOS tube Q7, the source electrode of the 8th NMOS tube Q8 as the 2nd H bridges B.
In addition, the break-make that a metal-oxide-semiconductor control circuit is used to control the NMOS tube of above-mentioned two H bridges is also set up, first
The grid of NMOS tube Q1, the grid of the second NMOS tube Q2, the grid of third NMOS tube Q3, the grid of the 4th NMOS tube Q4, the 5th
The grid of NMOS tube Q5, the grid of the 6th NMOS tube Q6, the grid of the 7th NMOS tube Q7, the 8th NMOS tube Q8 grid and MOS
Pipe control circuit connects.
As being further improved for technical solution, above-mentioned NMOS tube can be replaced using triode.
As being further improved for technical solution, current potential comparison circuit includes potential comparator (i.e. voltage comparator) and uses
In data processing and the microcontroller judged, the ungrounded end of the first sampling resistor, the ungrounded end of the second sampling resistor and current potential
The input terminal connection of comparator, the output terminal of potential comparator and the input terminal of microcontroller connect.Potential comparator is used for comparing
The power cathode end of first H bridges and the current potential at the power cathode end of the 2nd H bridges, the data that detection is obtained are sent into microcontroller and are carried out
Processing.
As being further improved for technical solution, current potential comparison circuit further includes testing result prompt unit, microcontroller
Output terminal is connect with the input terminal of testing result prompt unit.Testing result prompt unit is indicator light and/or voice output list
LED light may be used to realize in member and/or display unit, indicator light, is represented not by the way that LED light is controlled to show different colors
With testing result, for example, green light represents testing result to pass through, two H bridges are applications in parallel, red light represent testing result as
Do not pass through, the non-application in parallel of two H bridges；And voice-output unit is then directly by testing result using audible devices such as loud speakers
Speech play output is carried out, user is facilitated directly to know testing result；Display unit is then directly will detection using display screen
As a result it is shown, such as display printed words " parallel connection " or " non-parallel connection "；It is it is in fact possible to single using three kinds of testing result promptings
Member one kind therein is used to realize testing result output or be combined with each other.
It is that the preferable of the utility model is implemented to be illustrated, but the invention is not limited to the reality above
Example is applied, those skilled in the art can also make various equivalent variations without departing from the spirit of the present invention
Or replace, these equivalent deformations or replacement are all contained in the application claim limited range.
Claims (7)
1. a kind of detecting system of H bridges, the detecting systems of the H bridges includes the first H bridges and the 2nd H bridges, the first H bridges, the
Two H bridges are used to driving motor, and the first H bridges, the 2nd H bridges are connect with motor；It is characterized in that,
It is more electric that the detecting system of the H bridges further includes pulse-generating circuit, the first sampling resistor, the second sampling resistor and current potential
Road；The output terminal of the pulse-generating circuit is connect with the power cathode end of the first H bridges, for exporting transient pulse to the first H
The power cathode end of bridge；The power cathode end of the first H bridges is grounded by the first sampling resistor, the power supply of the 2nd H bridges
Negative pole end is grounded by the second sampling resistor；The ungrounded end of first sampling resistor, the ungrounded end of the second sampling resistor
It is connect with the input terminal of current potential comparison circuit；The current potential comparison circuit is used to be input to the power supply of the first H bridges when transient pulse
During negative pole end, whether the power cathode end for detecting the first H bridges is consistent with the current potential at the power cathode end of the 2nd H bridges, to judge the
The connection status of one H bridges and the 2nd H bridges.
2. the detecting system of H bridges according to claim 1, which is characterized in that the first H bridges include the first NMOS tube,
Second NMOS tube, third NMOS tube and the 4th NMOS tube, the drain electrode of first NMOS tube, the drain electrode of the second NMOS tube are as
The power positive end of one H bridges is connect with positive pole, and the source electrode of first NMOS tube is connect with the drain electrode of third NMOS tube, institute
The source electrode for stating the second NMOS tube is connect with the drain electrode of the 4th NMOS tube, the source electrode of the third NMOS tube, the source of the 4th NMOS tube
Power cathode end of the pole as the first H bridges.
3. the detecting system of H bridges according to claim 1, which is characterized in that the 2nd H bridges include the 5th NMOS tube,
6th NMOS tube, the 7th NMOS tube and the 8th NMOS tube, the drain electrode of the 5th NMOS tube, the drain electrode of the 6th NMOS tube are as
The power positive end of two H bridges is connect with positive pole, and the source electrode of the 5th NMOS tube is connect with the drain electrode of the 7th NMOS tube, institute
The source electrode for stating the 6th NMOS tube is connect with the drain electrode of the 8th NMOS tube, the source electrode of the 7th NMOS tube, the source of the 8th NMOS tube
Power cathode end of the pole as the 2nd H bridges.
4. the detecting system of H bridges according to any one of claims 1 to 3, which is characterized in that the current potential comparison circuit packet
Include potential comparator, the ungrounded end of first sampling resistor, the ungrounded end of the second sampling resistor and potential comparator
Input terminal connects.
5. the detecting system of H bridges according to claim 4, which is characterized in that the current potential comparison circuit further includes monolithic
Machine, the output terminal of the potential comparator and the input terminal of microcontroller connect.
6. the detecting system of H bridges according to claim 5, which is characterized in that the current potential comparison circuit further includes detection
As a result prompt unit, the output terminal of the microcontroller are connect with the input terminal of testing result prompt unit.
7. the detecting system of H bridges according to claim 6, which is characterized in that the testing result prompt unit is instruction
Lamp and/or voice-output unit and/or display unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721589004.3U CN207488418U (en) | 2017-11-23 | 2017-11-23 | A kind of detecting system of H bridges |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721589004.3U CN207488418U (en) | 2017-11-23 | 2017-11-23 | A kind of detecting system of H bridges |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207488418U true CN207488418U (en) | 2018-06-12 |
Family
ID=62472586
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721589004.3U Withdrawn - After Issue CN207488418U (en) | 2017-11-23 | 2017-11-23 | A kind of detecting system of H bridges |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207488418U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107861019A (en) * | 2017-11-23 | 2018-03-30 | 深圳市巴丁微电子有限公司 | A kind of detecting system and detection method of H bridges |
-
2017
- 2017-11-23 CN CN201721589004.3U patent/CN207488418U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107861019A (en) * | 2017-11-23 | 2018-03-30 | 深圳市巴丁微电子有限公司 | A kind of detecting system and detection method of H bridges |
| CN107861019B (en) * | 2017-11-23 | 2023-09-05 | 深圳市巴丁微电子有限公司 | H-bridge detection system and detection method |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20180612 Effective date of abandoning: 20230905 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20180612 Effective date of abandoning: 20230905 |