CN205622553U - Dynamic braking circuit and motor drive - Google Patents
Dynamic braking circuit and motor drive Download PDFInfo
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- CN205622553U CN205622553U CN201620383683.8U CN201620383683U CN205622553U CN 205622553 U CN205622553 U CN 205622553U CN 201620383683 U CN201620383683 U CN 201620383683U CN 205622553 U CN205622553 U CN 205622553U
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- energy
- power supply
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- motor
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- 239000004065 semiconductor Substances 0.000 claims description 24
- 238000005265 energy consumption Methods 0.000 claims description 14
- 230000005611 electricity Effects 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000036461 convulsion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
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- Stopping Of Electric Motors (AREA)
Abstract
The utility model provides dynamic braking circuit and motor drive, the dynamic braking circuit is connected with motor power supplying bus, and the dynamic braking circuit includes: a trigger element, the input termination motor power supplying bus, the output is in output signal of telecommunication during motor power supplying bus overtension, a drive unit, the power termination the output of trigger element, drive unit receives outlet driving signal behind the signal of telecommunication, a power switch, the control termination drive unit's output under driving, drive signal switches on, a power consumption unit, a termination motor power supplying bus, the other end passes through the power switch connects geothermal water ware operating circuit and water heater, adopts the hardware control dynamic braking circuit, need not to occupy motor drive's main control chip software resource, and the signal does not have the delay, and the protection action is fast, reliable and stable.
Description
Technical field
This utility model relates to motor and drives field, particularly relates to a kind of energy-dissipating brake circuit and motor drives
Device.
Background technology
In rare-earth permanent-magnet electric machine controller, often require that realizing motor quickly responds, i.e. motor is in anxious rising
In jerk state, motor, as inductive load, can produce high inverse electromotive force when quick shutdown, this
Circuit may be caused damage by peak voltage.It is thus desirable to arrange safe operating voltage, when circuit busbar electricity
When pressing through high, energy-dissipating brake circuit is operated, and consumes excess energy in circuit to reach to protect hardware mesh
's.
Current general energy-dissipating brake circuit is to detect busbar voltage, when overtension being detected by main control chip
Time trigger energy-consumption braking circuit, after voltage is normal, close again energy-consumption braking circuit.It is thus desirable to it is higher
AD (analog digital conversion) frequency acquisition, need to take certain software resource.When main control chip AD acquisition rate relatively
Time low, back-emf still has the possibility damaging circuit.
Utility model content
Based on this, have and a kind of safe and reliable energy-dissipating brake circuit of offer is provided.
This utility model provides a kind of energy-dissipating brake circuit, is connected with motor power supply buses, including:
One trigger element, input terminates described motor power supply buses, and outfan is at described motor power supply buses electricity
The signal of telecommunication is exported when pressing through high；
One driver element, power supply terminates the outfan of described trigger element, and described driver element receives described electricity
Output drive signal after signal；
One power switch, controls to terminate the outfan of described driver element, leads under described driving signal drives
Logical；
One power consumption unit, one terminates described motor power supply buses, and the other end passes through described power switch ground connection.
Preferably, described trigger element includes that a stabilivolt, the negative electrode of described stabilivolt connect described motor and power
Bus, anode connects the power end of described driver element.
Preferably, described power switch includes that a N-type metal-oxide-semiconductor, the grid of described N-type metal-oxide-semiconductor are
The control end of described power switch, the drain electrode of described N-type metal-oxide-semiconductor connects the other end of described power consumption unit,
The source ground of described N-type metal-oxide-semiconductor.
Preferably, also include that a pull down resistor, described pull down resistor one terminate the grid of described N-type metal-oxide-semiconductor
Pole, other end ground connection.
Preferably, described driver element is metal-oxide-semiconductor driving chip.
Preferably, described power consumption unit includes an energy consumption resistor and a diode, and the anode of described diode leads to
Crossing described power switch ground connection, negative electrode connects described motor power supply buses, described energy consumption resistor and described diode
In parallel.
This utility model additionally provides a kind of motor driver, including above-mentioned energy-dissipating brake circuit.
Such scheme uses hardware controls energy-dissipating brake circuit, it is not necessary to the main control chip taking motor driver is soft
Part resource, signal is without postponing, and protection act is fast, reliable and stable.Avoid and need to carry out energy consumption guarantor at some
In the pure analog circuit protected, because carrying out the collection of busbar voltage without main control chip, dynamic braking greatly tired
The problem disturbed.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of energy-dissipating brake circuit in this utility model preferred embodiment.
Detailed description of the invention
In order to make the technical problems to be solved in the utility model, technical scheme and beneficial effect clearer,
Below in conjunction with drawings and Examples, this utility model is further elaborated.Should be appreciated that herein
Described specific embodiment, only in order to explain this utility model, is not used to limit this utility model.
Referring to Fig. 1, in this utility model preferred embodiment, energy-dissipating brake circuit can be applicable to motor driver,
Energy-dissipating brake circuit is connected with motor power supply buses DC+, and energy-dissipating brake circuit includes: trigger element 11, drive
Moving cell 12, power switch M1 and power consumption unit 13.
The input of trigger element 11 terminates described motor power supply buses DC+, and the outfan of trigger element 11 exists
The signal of telecommunication is exported during described motor power supply buses DC+ overtension；The power supply termination of driver element 12 is described
The outfan of trigger element 11, described driver element 12 receives output drive signal after the described signal of telecommunication；Merit
Rate switch M1 controls to terminate the outfan of described driver element 12, and power switch M1 drives letter described
Number drive lower conducting；The one described motor power supply buses DC+ of termination of power consumption unit 13, the other end passes through institute
State power switch M1 ground connection.
In the present embodiment, trigger element 11 includes that a stabilivolt D1, the negative electrode of described stabilivolt D1 meet institute
Stating motor power supply buses DC+, anode connects the power end of described driver element 12.In other embodiments,
Can replace with existing voltage sampling circuit.
Described driver element 12 is metal-oxide-semiconductor driving chip U1, such as IRS2003.Power switch M1 includes
One N-type metal-oxide-semiconductor, the grid of described N-type metal-oxide-semiconductor is the control end of described power switch M1, institute
The drain electrode stating N-type metal-oxide-semiconductor connects the other end of described power consumption unit 13, the source electrode of described N-type metal-oxide-semiconductor
Ground connection.In other embodiments, can replace with p-type metal-oxide-semiconductor or IGBT.
Power consumption unit 13 includes an an energy consumption resistor R1 and diode D2, and the anode of described diode D2 leads to
Crossing described power switch M1 ground connection, negative electrode meets described motor power supply buses DC+, described energy consumption resistor R1
In parallel with described diode D2.
Energy-dissipating brake circuit also includes that a pull down resistor R2, described pull down resistor R2 mono-terminate described N-type
The grid of metal-oxide-semiconductor, other end ground connection.Pull down resistor R2 ensures that N-type metal-oxide-semiconductor acquiescence is closed mode,
Drop-down maintenance system working stability.
In this programme: when motor power supply buses DC+ overtension, stabilivolt D1 works, and metal-oxide-semiconductor drives
Dynamic chip U1 output signal controls metal-oxide-semiconductor conducting, and energy consumption resistor R1 generates heat consumed energy.When bus electricity
When being pressed in circuit safety voltage range, stabilivolt D1 quits work, and metal-oxide-semiconductor closes output, now energy consumption
Braking circuit does not works.When needs adjust difference protection point, revise device parameters.
This programme uses pure hardware circuit to realize dynamic braking, reaches protection circuit purpose, it is not necessary to take software
Resource.The concrete stabilivolt D1 of employing detects motor power supply buses DC+ voltage, as motor power supply buses DC+
During overtension, stabilivolt D1 works and is that metal-oxide-semiconductor driving chip U1 powers, driving chip and then defeated
Going out signal and control metal-oxide-semiconductor conducting, energy consumption resistor R1 i.e. proceeds by power consumption process.Use hardware controls energy
Consumption braking circuit, it is not necessary to take main control chip software resource, signal is without postponing, and protection act is fast, stably may be used
Lean on.
The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model,
All any amendment, equivalent and improvement etc. made within spirit of the present utility model and principle, all should
Within being included in protection domain of the present utility model.
Claims (7)
1. an energy-dissipating brake circuit, is connected with motor power supply buses, it is characterised in that including:
One trigger element, input terminates described motor power supply buses, and outfan is at described motor power supply buses electricity
The signal of telecommunication is exported when pressing through high；
One driver element, power supply terminates the outfan of described trigger element, and described driver element receives described electricity
Output drive signal after signal；
One power switch, controls to terminate the outfan of described driver element, leads under described driving signal drives
Logical；
One power consumption unit, one terminates described motor power supply buses, and the other end passes through described power switch ground connection.
2. energy-dissipating brake circuit as claimed in claim 1, it is characterised in that described trigger element includes
Stabilivolt, the negative electrode of described stabilivolt connects described motor power supply buses, and anode connects the power supply of described driver element
End.
3. energy-dissipating brake circuit as claimed in claim 1, it is characterised in that described power switch includes
N-type metal-oxide-semiconductor, the control end that grid is described power switch of described N-type metal-oxide-semiconductor, described N-type
The drain electrode of metal-oxide-semiconductor connects the other end of described power consumption unit, the source ground of described N-type metal-oxide-semiconductor.
4. energy-dissipating brake circuit as claimed in claim 3, it is characterised in that also include a pull down resistor,
Described pull down resistor one terminates the grid of described N-type metal-oxide-semiconductor, other end ground connection.
5. energy-dissipating brake circuit as claimed in claim 3, it is characterised in that described driver element is MOS
Pipe driving chip.
6. energy-dissipating brake circuit as claimed in claim 1, it is characterised in that described power consumption unit includes
Energy consumption resistor and a diode, the anode of described diode passes through described power switch ground connection, and negative electrode connects described
Motor power supply buses, described energy consumption resistor and described diodes in parallel.
7. a motor driver, it is characterised in that include the energy consumption described in any one of claim 1 to 6
Braking circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620383683.8U CN205622553U (en) | 2016-04-29 | 2016-04-29 | Dynamic braking circuit and motor drive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620383683.8U CN205622553U (en) | 2016-04-29 | 2016-04-29 | Dynamic braking circuit and motor drive |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205622553U true CN205622553U (en) | 2016-10-05 |
Family
ID=57024951
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620383683.8U Expired - Fee Related CN205622553U (en) | 2016-04-29 | 2016-04-29 | Dynamic braking circuit and motor drive |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205622553U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109742933A (en) * | 2019-01-22 | 2019-05-10 | 浙江众邦机电科技有限公司 | A kind of motor driven systems and its auxiliary power-off system |
-
2016
- 2016-04-29 CN CN201620383683.8U patent/CN205622553U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109742933A (en) * | 2019-01-22 | 2019-05-10 | 浙江众邦机电科技有限公司 | A kind of motor driven systems and its auxiliary power-off system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161005 |