CN108258978A - Motor control assembly - Google Patents
Motor control assembly Download PDFInfo
- Publication number
- CN108258978A CN108258978A CN201810188347.1A CN201810188347A CN108258978A CN 108258978 A CN108258978 A CN 108258978A CN 201810188347 A CN201810188347 A CN 201810188347A CN 108258978 A CN108258978 A CN 108258978A
- Authority
- CN
- China
- Prior art keywords
- motor
- field
- effect tube
- control assembly
- motor control
- 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.)
- Pending
Links
- 238000001514 detection method Methods 0.000 claims abstract description 17
- 230000005669 field effect Effects 0.000 claims description 37
- 238000005070 sampling Methods 0.000 claims description 15
- 230000000712 assembly Effects 0.000 claims 1
- 238000000429 assembly Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 description 8
- 230000005611 electricity Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 239000004020 conductor Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
- H02P29/02—Providing protection against overload without automatic interruption of supply
- H02P29/024—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load
- H02P29/027—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load the fault being an over-current
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/085—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load
- H02H7/0854—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load responsive to rate of change of current, couple or speed, e.g. anti-kickback protection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
- H02P29/02—Providing protection against overload without automatic interruption of supply
- H02P29/032—Preventing damage to the motor, e.g. setting individual current limits for different drive conditions
Abstract
Present invention is disclosed a kind of motor control assembly, described device includes control unit, detection unit and current limiting unit, and control unit is connect respectively with detection unit and current limiting unit, wherein：Detection unit, for detecting the operating current of motor；Control unit, for when operating current is greater than or equal to threshold value, control current limiting unit to stop powering to motor.A kind of motor control assembly that the embodiment of the present invention is provided, by detecting the operating current of motor, when the operating current of motor is excessive, then stop powering to motor, it is excessive and burn out circuit so as to avoid electric current during motor operational failure, improve the safety of circuit.
Description
Technical field
The present invention relates to electronic technology fields, especially relate to a kind of motor control assembly.
Background technology
Machine, equipment driving mechanism usually provide power using motor, motor is in operation process, it is possible to occur
Failure, for example during forward or reverse, there is stuck situation, the operating current moment that at this moment may result in motor increases
Height, so as to burn out circuit.
Therefore, how to avoid during motor operational failure electric current excessive and burn out circuit, improve the safety of circuit, be current
The technical issues of urgent need to resolve.
Invention content
The main object of the present invention is provides a kind of motor control assembly, it is intended to which electric current is excessive when avoiding motor operational failure
And circuit is burnt out, improve the safety of circuit.
To achieve these objectives, the embodiment of the present invention proposes a kind of motor control assembly, and the motor control assembly includes control
Unit processed, detection unit and current limiting unit, described control unit are connect respectively with the detection unit and the current limiting unit,
In：
The detection unit, for detecting the operating current of motor；
Described control unit, for when the operating current is greater than or equal to threshold value, the current limiting unit being controlled to stop
It powers to the motor.
Optionally, the current limiting unit includes the first field-effect tube and the second field-effect tube, first field-effect tube
Source electrode connection power supply, drain electrode connect the power end of described control unit, grid connects the drain electrode of second field-effect tube, described
The source electrode ground connection of second field-effect tube, described control unit output a control signal to the grid of second field-effect tube to control
The break-make of second field-effect tube.
Optionally, the current limiting unit further includes first resistor, and the first resistor both ends connect described first respectively
The drain and gate of effect pipe.
Optionally, the current limiting unit further includes second resistance, and the second resistance both ends connect described second respectively
The grid and source electrode of effect pipe.
Optionally, the current limiting unit further includes 3rd resistor, and the control signal of described control unit output is via described
3rd resistor reaches the grid of second field-effect tube.
Optionally, the detection unit includes sampling resistor and analog-digital converter, and the analog-digital converter is used to detect electricity
The operating current of machine, the ground terminal of the sampling resistor first end connection described control unit, second end ground connection, the modulus turn
Parallel operation connects the first end of the sampling resistor.
Optionally, the sampling resistor is Milliohm resistance.
Optionally, the resistance value of the sampling resistor is 55-57 milliohms.
Optionally, the first resistor is kilo-ohm grade resistance.
Optionally, the second resistance is kilo-ohm grade resistance.
A kind of motor control assembly that the embodiment of the present invention is provided, by detecting the operating current of motor, when motor
When operating current is excessive, then stop powering to motor, it is excessive and burn out circuit so as to avoid electric current during motor operational failure, it carries
The high safety of circuit.
Description of the drawings
Fig. 1 is the connection diagram of the motor control assembly of the present invention；
Fig. 2 is the motor control assembly of the embodiment of the present invention and the circuit connection diagram of motor.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific embodiment
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
The embodiment of the present invention is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, and is only used for explaining the present invention, and is not construed as limiting the claims.
Those skilled in the art of the present technique are appreciated that unless expressly stated, singulative " one " used herein, " one
It is a ", " described " and "the" may also comprise plural form.It is to be further understood that is used in the specification of the present invention arranges
Diction " comprising " refers to there are the feature, integer, step, operation, element and/or component, but it is not excluded that presence or addition
Other one or more features, integer, step, operation, element, component and/or their group.It should be understood that when we claim member
Part is " connected " or during " coupled " to another element, it can be directly connected or coupled to other elements or there may also be
Intermediary element.In addition, " connection " used herein or " coupling " can include wireless connection or wireless coupling.It is used herein to arrange
Take leave whole or any cell and all combination of the "and/or" including one or more associated list items.
Those skilled in the art of the present technique are appreciated that unless otherwise defined all terms used herein are (including technology art
Language and scientific terminology), there is the meaning identical with the general understanding of the those of ordinary skill in fields of the present invention.Should also
Understand, those terms such as defined in the general dictionary, it should be understood that have in the context of the prior art
The consistent meaning of meaning, and unless by specific definitions as here, the meaning of idealization or too formal otherwise will not be used
To explain.
With reference to Fig. 1, one embodiment of motor control assembly of the present invention is proposed, the motor control assembly includes control unit
10th, detection unit 20 and current limiting unit 30, control unit 10 are connect respectively with detection unit 20 and current limiting unit 30.Detection unit
The operating current of 20 real-time or timing detection motors, and testing result is sent to control unit 10, it will detect in other words
Operating current be conveyed to control unit 10.Control unit 10 compares the operating current of motor and the size of threshold value, judges work
Whether electric current is greater than or equal to threshold value, and when operating current is greater than or equal to threshold value, control current limiting unit 30 stops supplying to motor
Electricity；In other words, when operating current is greater than or equal to threshold value, control unit 10 is then triggered sends control letter to current limiting unit
Number, current limiting unit 30 to be controlled to stop powering to motor.So as to which electric current is excessive and burn out circuit when preventing motor operational failure.
As shown in Fig. 2, for the motor control assembly of the embodiment of the present invention and the circuit connection diagram of motor.
In the embodiment of the present invention, preferably chip, ground terminal GND are connect control unit 10 with detection unit 20 in order to control,
Power end Vcc pins are connect with current limiting unit 30, and output terminal OUTA and OUTB is connect with motor 40.
In the embodiment of the present invention, detection unit 20 includes sampling resistor R21 and analog-digital converter ADC.Sampling resistor R21
One end connects the ground terminal GND of control unit 10, and second end ground connection is used for current of electric sampling.Analog-digital converter ADC connections
The first end of sampling resistor R21 is used to detect the operating current of motor 40.Specifically, analog-digital converter ADC in real time or timing
Detectable voltage signals, be computed being converted to electric current, control unit 10 judges whether current value is more than threshold value, when a threshold is exceeded
Control current limiting unit 30 stops powering to motor 40.
Sampling resistor R21 is Milliohm resistance, and the value range of resistance value can be 55m Ω -57m Ω, preferably 56m Ω.
In the embodiment of the present invention, current limiting unit 30 includes the first field-effect tube Q1 and the second field-effect tube Q2, first effect
Should pipe Q1 and the second field-effect tube Q2 be preferably metal-oxide-semiconductor (Metal-Oxide Semiconductor FET, metal-oxide half
Conductor field-effect tube).The source S connection power supply (such as 5V power supplys) of first field-effect tube Q1, the electricity of drain D connection control unit 10
Source Vcc, grid G connect the drain D of the second field-effect tube Q2, and the source S of the second field-effect tube Q2 is grounded, and control unit 10 is defeated
Go out to control signal MOTO_CTR to the grid G of the second field-effect tube Q2 to control the break-make of the second field-effect tube Q2.
For example, when the operating current of motor 40 is more than threshold value, the output control signal of control unit 10 MOTO_CTR is (such as low
Level signal) to the grid G of the second field-effect tube Q2, the grid G of the second field-effect tube Q2 blocks after receiving low level signal
Second field-effect tube Q2.After the grid G of first field-effect tube Q1 detects that the second field-effect tube Q2 is blocked, first effect is also blocked
It should pipe Q1 so that the drain D of the first field-effect tube Q1 stops output current.
Further, current limiting unit 30 further includes first resistor R11, and first resistor R11 both ends connect first effect respectively
Should pipe Q1 drain D and grid G, be used for preferably control the first field-effect tube Q1 conducting, improve circuit control effect.The
One resistance R11 is kilo-ohm grade resistance, and value range can be 45K Ω -50K Ω, preferably 47K Ω.
Further, current limiting unit 30 further includes second resistance R12, and second resistance R12 both ends connect second effect respectively
Should pipe Q2 grid G and source S, be used to carry out partial pressure protection to the second field-effect tube Q2, improve the safety of circuit.Second
Resistance R12 is kilo-ohm grade resistance, and value range can be 8K Ω -13K Ω, preferably 10K Ω.
Further, current limiting unit 30 further includes 3rd resistor R13, and the control signal that control unit 10 exports is via third
Resistance R13 reach the second field-effect tube Q2 grid G, be used for R12 collective effects, preferably to the second field-effect tube Q2 into
Row partial pressure protection, further improves the safety of circuit.3rd resistor R13 is kilo-ohm grade resistance, and value range can be 47K
Ω -100K Ω, preferably 47K Ω.
The motor control assembly of the embodiment of the present invention, by detecting the operating current of motor 40, when the work electricity of motor 40
When flowing through big, then stop powering to motor 40, it is excessive and burn out circuit so as to avoid electric current during 40 operational failure of motor, it improves
The safety of circuit.
The foregoing is merely the preferred embodiment of the present invention, are not intended to limit the scope of the invention, every utilization
The equivalent structure or equivalent flow shift that description of the invention and accompanying drawing content are made directly or indirectly is used in other correlations
Technical field, be included within the scope of the present invention.
Claims (10)
1. a kind of motor control assembly, which is characterized in that including control unit, detection unit and current limiting unit, the control is single
Member is connect respectively with the detection unit and the current limiting unit, wherein：
The detection unit, for detecting the operating current of motor；
Described control unit, for when the operating current is greater than or equal to threshold value, the current limiting unit being controlled to stop to institute
State motor power supply.
2. motor control assembly according to claim 1, which is characterized in that the current limiting unit includes the first field-effect tube
With the second field-effect tube, the source electrode connection power supply of first field-effect tube, power end, the grid of drain electrode connection described control unit
Pole connects the drain electrode of second field-effect tube, the source electrode ground connection of second field-effect tube, described control unit output control
Signal is to the grid of second field-effect tube to control the break-make of second field-effect tube.
3. motor control assembly according to claim 2, which is characterized in that the current limiting unit further includes first resistor,
The first resistor both ends connect the drain and gate of first field-effect tube respectively.
4. motor control assembly according to claim 2, which is characterized in that the current limiting unit further includes second resistance,
The second resistance both ends connect the grid and source electrode of second field-effect tube respectively.
5. motor control assembly according to claim 4, which is characterized in that the current limiting unit further includes 3rd resistor,
The control signal of described control unit output reaches the grid of second field-effect tube via the 3rd resistor.
6. according to claim 1-5 any one of them motor control assemblies, which is characterized in that the detection unit includes sampling
Resistance and analog-digital converter, the analog-digital converter are used to detect the operating current of motor, the sampling resistor first end connection
The ground terminal of described control unit, second end ground connection, the analog-digital converter connect the first end of the sampling resistor.
7. motor control assembly according to claim 6, which is characterized in that the sampling resistor is Milliohm resistance.
8. motor control assembly according to claim 7, which is characterized in that the resistance value of the sampling resistor is 55-57 millis
Europe.
9. motor control assembly according to claim 3, which is characterized in that the first resistor is kilo-ohm grade resistance.
10. motor control assembly according to claim 4, which is characterized in that the second resistance is kilo-ohm grade resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810188347.1A CN108258978A (en) | 2018-03-07 | 2018-03-07 | Motor control assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810188347.1A CN108258978A (en) | 2018-03-07 | 2018-03-07 | Motor control assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108258978A true CN108258978A (en) | 2018-07-06 |
Family
ID=62746056
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810188347.1A Pending CN108258978A (en) | 2018-03-07 | 2018-03-07 | Motor control assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108258978A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113009997A (en) * | 2021-02-19 | 2021-06-22 | 山东英信计算机技术有限公司 | Control method and system of high-power direct-current power supply system |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5867357A (en) * | 1997-06-19 | 1999-02-02 | Eaton Corporation | Dynamic protection circuit for a motor type load |
| CN202094833U (en) * | 2011-06-30 | 2011-12-28 | 利尔达科技有限公司 | Digital controller of single-phase brushless motor |
| CN202261136U (en) * | 2011-09-28 | 2012-05-30 | 珠海格力电器股份有限公司 | Motor and overcurrent detection circuit thereof |
| CN103022963A (en) * | 2012-12-04 | 2013-04-03 | 北京经纬恒润科技有限公司 | High-end over-current protection circuit |
| CN203243311U (en) * | 2013-04-28 | 2013-10-16 | 宜宾三江机械有限责任公司 | Switching value detection apparatus based on analog-to-digital converter |
| CN103390877A (en) * | 2013-08-07 | 2013-11-13 | 北京经纬恒润科技有限公司 | Overcurrent detection and protection circuit |
| CN104126270A (en) * | 2012-02-15 | 2014-10-29 | 日立工机株式会社 | Electric working machine |
| CN204795668U (en) * | 2015-07-13 | 2015-11-18 | 佛山市顺德区美的电热电器制造有限公司 | Power supply circuit of electromagnetic heating culinary art device and electromagnetic heating culinary art device |
| CN205946252U (en) * | 2016-07-13 | 2017-02-08 | 深圳Tcl数字技术有限公司 | Led actuating device |
-
2018
- 2018-03-07 CN CN201810188347.1A patent/CN108258978A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5867357A (en) * | 1997-06-19 | 1999-02-02 | Eaton Corporation | Dynamic protection circuit for a motor type load |
| CN202094833U (en) * | 2011-06-30 | 2011-12-28 | 利尔达科技有限公司 | Digital controller of single-phase brushless motor |
| CN202261136U (en) * | 2011-09-28 | 2012-05-30 | 珠海格力电器股份有限公司 | Motor and overcurrent detection circuit thereof |
| CN104126270A (en) * | 2012-02-15 | 2014-10-29 | 日立工机株式会社 | Electric working machine |
| CN103022963A (en) * | 2012-12-04 | 2013-04-03 | 北京经纬恒润科技有限公司 | High-end over-current protection circuit |
| CN203243311U (en) * | 2013-04-28 | 2013-10-16 | 宜宾三江机械有限责任公司 | Switching value detection apparatus based on analog-to-digital converter |
| CN103390877A (en) * | 2013-08-07 | 2013-11-13 | 北京经纬恒润科技有限公司 | Overcurrent detection and protection circuit |
| CN204795668U (en) * | 2015-07-13 | 2015-11-18 | 佛山市顺德区美的电热电器制造有限公司 | Power supply circuit of electromagnetic heating culinary art device and electromagnetic heating culinary art device |
| CN205946252U (en) * | 2016-07-13 | 2017-02-08 | 深圳Tcl数字技术有限公司 | Led actuating device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113009997A (en) * | 2021-02-19 | 2021-06-22 | 山东英信计算机技术有限公司 | Control method and system of high-power direct-current power supply system |
| CN113009997B (en) * | 2021-02-19 | 2022-11-04 | 山东英信计算机技术有限公司 | Control method and system of high-power direct-current power supply system |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180706 |