CN205992866U - A kind of brshless DC motor braking circuit and brshless DC motor - Google Patents
A kind of brshless DC motor braking circuit and brshless DC motor Download PDFInfo
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- CN205992866U CN205992866U CN201620815291.4U CN201620815291U CN205992866U CN 205992866 U CN205992866 U CN 205992866U CN 201620815291 U CN201620815291 U CN 201620815291U CN 205992866 U CN205992866 U CN 205992866U
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- motor
- audion
- brshless
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- optocoupler
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Abstract
This utility model belongs to electrical brake circuit technical field, more particularly, to a kind of brshless DC motor braking circuit and brshless DC motor.In this utility model embodiment, brshless DC motor braking circuit includes three-phase windings, motor driver, switch, braking resistor R1 and the brak control unit of brshless DC motor, motor driver and brak control unit are kept completely separate, when motor braking, electric current does not flow through motor driver, thus without the problem causing the damage to motor driver and motor permanent magnet demagnetization.
Description
Technical field
This utility model belongs to electrical brake circuit technical field, more particularly, to a kind of brshless DC motor braking circuit and
Brshless DC motor.
Background technology
In traditional commercial blender, motor generally adopts AC induction motor or series excited machine, the problem having
It is positive/negative transhipment cannot to go and be difficult to speed governing.Brshless DC motor can be very good to solve the problems, such as that conventional motors have.And no
Brushless motor efficiency high, the feature of life-span length also agree with the theory of current energy-conserving and environment-protective very much.
Commercial blender typically carries cutter, needs motor to brake rapidly in emergency situations, in case cutter is to human body
Cause to damage.Solve the key that this problem is that brshless DC motor is flexibly applied to blender.
Because brshless DC motor typically has, phase inductance is little, phase resistance is low, directly brakes according to driver,
Motor can produce great faradic current, and this electric current had not only been likely to result in the damage of driver but also had been likely to result in motor permanent magnet and moved back
Magnetic.
Utility model content
The purpose of this utility model embodiment is to provide a kind of brshless DC motor braking circuit and brshless DC motor,
Aim to solve the problem that present motor braking circuits can cause driver damage and the problem of motor permanent magnet demagnetization.
This utility model embodiment is achieved in that a kind of brshless DC motor braking circuit, including brushless dc
The three-phase windings of machine, described brshless DC motor braking circuit also includes：
The motor driver being connected with the three-phase windings of described brshless DC motor respectively；
It is connected to 3 switches between described motor driver and the three-phase windings of described brshless DC motor；
3 braking resistors R1, the first end of described 3 braking resistors R1 connects described 3 switches, described 3 brakings respectively
Second end of resistance R1 connects jointly；
The brak control unit being connected with described 3 switches respectively.
In said structure, described 3 switches are respectively adopted 3 relay RY1, and the switch of described each relay RY1 moves
End connects the three-phase windings of described brshless DC motor respectively, and switch first fixed end of described each relay RY1 connects described 3 respectively
The first end of individual braking resistor R1, switch second fixed end of described each relay RY1 connects described motor driver respectively.
In said structure, described brak control unit includes：
3 control for brake branch roads, optocoupler U1, optocoupler U2, metal-oxide-semiconductor Q7, metal-oxide-semiconductor Q8, each control for brake branch road bag described
Include audion Q1, audion Q4, resistance R4, resistance R5, resistance R6 and diode D1；
The anode of light emitting diode of described optocoupler U1 and optocoupler U2 and negative electrode meet brake signal end, described optocoupler U1 respectively
The colelctor electrode of audion connect the base stage of the audion Q4 of each control for brake branch road described respectively by described resistance R6, described
The colelctor electrode of the audion of optocoupler U1 also connects the grid of described metal-oxide-semiconductor Q7 and metal-oxide-semiconductor Q8 respectively, the audion of described optocoupler U1
Emitter stage meets the colelctor electrode of the audion of described optocoupler U2, the grounded emitter of the audion of described optocoupler U2, described metal-oxide-semiconductor Q7
With the source ground of metal-oxide-semiconductor Q8, the drain electrode of described metal-oxide-semiconductor Q7 and metal-oxide-semiconductor Q8 connects each system described commonly through described resistance R5
The base stage of the audion Q1 of dynamic controlling brancher, the emitter stage of described audion Q4 connects power supply, and the colelctor electrode of described audion Q4 leads to
Cross the negative electrode that described resistance R4 meets described diode D1, the anode of described diode D1 meets the colelctor electrode of described audion Q1, institute
State the grounded emitter of audion Q1, the anode of described diode D1 and negative electrode connect the coil two of described 3 relay RY1 respectively
End.
It is to provide a kind of brshless DC motor, described brshless DC motor in the another object of this utility model embodiment
Including the three-phase windings of brshless DC motor, described brshless DC motor braking circuit also includes：
The motor driver being connected with the three-phase windings of described brshless DC motor respectively；
It is connected to 3 switches between described motor driver and the three-phase windings of described brshless DC motor；
3 braking resistors R1, the first end of described 3 braking resistors R1 connects described 3 switches, described 3 brakings respectively
Second end of resistance R1 connects jointly；
The brak control unit being connected with described 3 switches respectively.
In said structure, described 3 switches are respectively adopted 3 relay RY1, and the switch of described each relay RY1 moves
End connects the three-phase windings of described brshless DC motor respectively, and switch first fixed end of described each relay RY1 connects described 3 respectively
The first end of individual braking resistor R1, switch second fixed end of described each relay RY1 connects described motor driver respectively.
In said structure, described brak control unit includes：
3 control for brake branch roads, optocoupler U1, optocoupler U2, metal-oxide-semiconductor Q7, metal-oxide-semiconductor Q8, each control for brake branch road bag described
Include audion Q1, audion Q4, resistance R4, resistance R5, resistance R6 and diode D1；
The anode of light emitting diode of described optocoupler U1 and optocoupler U2 and negative electrode meet brake signal end, described optocoupler U1 respectively
The colelctor electrode of audion connect the base stage of the audion Q4 of each control for brake branch road described respectively by described resistance R6, described
The colelctor electrode of the audion of optocoupler U1 also connects the grid of described metal-oxide-semiconductor Q7 and metal-oxide-semiconductor Q8 respectively, the audion of described optocoupler U1
Emitter stage meets the colelctor electrode of the audion of described optocoupler U2, the grounded emitter of the audion of described optocoupler U2, described metal-oxide-semiconductor Q7
With the source ground of metal-oxide-semiconductor Q8, the drain electrode of described metal-oxide-semiconductor Q7 and metal-oxide-semiconductor Q8 connects each system described commonly through described resistance R5
The base stage of the audion Q1 of dynamic controlling brancher, the emitter stage of described audion Q4 connects power supply, and the colelctor electrode of described audion Q4 leads to
Cross the negative electrode that described resistance R4 meets described diode D1, the anode of described diode D1 meets the colelctor electrode of described audion Q1, institute
State the grounded emitter of audion Q1, the anode of described diode D1 and negative electrode connect the coil two of described 3 relay RY1 respectively
End.
In this utility model embodiment, brshless DC motor braking circuit include brshless DC motor three-phase windings,
Motor driver, switch, braking resistor R1 and brak control unit, motor driver and brak control unit are kept completely separate, when
During motor braking, electric current does not flow through motor driver, thus without causing the damage to motor driver and motor permanent magnetism
The problem of body demagnetization.
Brief description
Fig. 1 is the function structure chart of the brshless DC motor braking circuit that this utility model embodiment provides；
Fig. 2 is the structure chart of the brshless DC motor braking circuit that this utility model embodiment provides.
Specific embodiment
In order that the purpose of this utility model, technical scheme and advantage become more apparent, below in conjunction with accompanying drawing and enforcement
Example, is further elaborated to this utility model.It should be appreciated that specific embodiment described herein is only in order to explain
This utility model, is not used to limit this utility model.
Fig. 1 shows the modular structure of the brshless DC motor braking circuit that this utility model embodiment provides, in order to just
In explanation, illustrate only the part related to this utility model embodiment.
A kind of brshless DC motor braking circuit, including the three-phase windings 1 of brshless DC motor, described brshless DC motor
Braking circuit also includes：
The motor driver 2 being connected with the three-phase windings 1 of described brshless DC motor respectively；
It is connected to 3 switches between described motor driver and the three-phase windings of described brshless DC motor；
3 braking resistors R1, the first end of described 3 braking resistors R1 connects described 3 switches 3, described 3 brakings respectively
Second end of resistance R1 connects jointly；
The brak control unit 4 being connected with described 3 switches respectively.
Fig. 2 shows the structure of the brshless DC motor braking circuit that this utility model embodiment provides, for the ease of saying
Bright, illustrate only the part related to this utility model embodiment.
As this utility model one embodiment, described 3 switches 3 are respectively adopted 3 relay RY1, each relay described
The switch moved end of device RY1 connects the three-phase windings 1 of described brshless DC motor, the switch first of described each relay RY1 respectively
Fixed end connects the first end of described 3 braking resistors R1 respectively, and switch second fixed end of described each relay RY1 connects described respectively
Motor driver 2.
As this utility model one embodiment, described brak control unit 4 includes：
3 control for brake branch roads 41, optocoupler U1, optocoupler U2, metal-oxide-semiconductor Q7, metal-oxide-semiconductor Q8, each control for brake branch road described
41 include audion Q1, audion Q4, resistance R4, resistance R5, resistance R6 and diode D1；
The anode of light emitting diode of described optocoupler U1 and optocoupler U2 and negative electrode connect brake signal end J1, described optocoupler respectively
The colelctor electrode of the audion of U1 connects the base stage of the audion Q4 of each control for brake branch road 41 described respectively by described resistance R6,
The colelctor electrode of the audion of described optocoupler U1 also connects the grid of described metal-oxide-semiconductor Q7 and metal-oxide-semiconductor Q8, three poles of described optocoupler U1 respectively
The emitter stage of pipe meets the colelctor electrode of the audion of described optocoupler U2, the grounded emitter of the audion of described optocoupler U2, described MOS
Pipe Q7 and the source ground of metal-oxide-semiconductor Q8, the drain electrode of described metal-oxide-semiconductor Q7 and metal-oxide-semiconductor Q8 connects described every commonly through described resistance R5
The base stage of the audion Q1 of individual control for brake branch road 41, the emitter stage of described audion Q4 connects power supply, the collection of described audion Q4
Electrode connects the negative electrode of described diode D1 by described resistance R4, and the anode of described diode D1 connects the current collection of described audion Q1
Pole, the grounded emitter of described audion Q1, the anode of described diode D1 and negative electrode connect described 3 relay RY1's respectively
Coil two ends.
The another object of this utility model embodiment is to provide a kind of brshless DC motor, described brshless DC motor bag
Include the three-phase windings 1 of brshless DC motor, described brshless DC motor braking circuit also includes：
The motor driver 2 being connected with the three-phase windings 1 of described brshless DC motor respectively；
It is connected to 3 switches between described motor driver and the three-phase windings of described brshless DC motor；
3 braking resistors R1, the first end of described 3 braking resistors R1 connects described 3 switches 3, described 3 brakings respectively
Second end of resistance R1 connects jointly；
The brak control unit 4 being connected with described 3 switches respectively.
Fig. 2 shows the structure of the brshless DC motor braking circuit that this utility model embodiment provides, for the ease of saying
Bright, illustrate only the part related to this utility model embodiment.
As this utility model one embodiment, described 3 switches 3 are respectively adopted 3 relay RY1, each relay described
The switch moved end of device RY1 connects the three-phase windings 1 of described brshless DC motor, the switch first of described each relay RY1 respectively
Fixed end connects the first end of described 3 braking resistors R1 respectively, and switch second fixed end of described each relay RY1 connects described respectively
Motor driver 2.
As this utility model one embodiment, described brak control unit 4 includes：
3 control for brake branch roads 41, optocoupler U1, optocoupler U2, metal-oxide-semiconductor Q7, metal-oxide-semiconductor Q8, each control for brake branch road described
41 include audion Q1, audion Q4, resistance R4, resistance R5, resistance R6 and diode D1；
The anode of light emitting diode of described optocoupler U1 and optocoupler U2 and negative electrode connect brake signal end J1, described optocoupler respectively
The colelctor electrode of the audion of U1 connects the base stage of the audion Q4 of each control for brake branch road 41 described respectively by described resistance R6,
The colelctor electrode of the audion of described optocoupler U1 also connects the grid of described metal-oxide-semiconductor Q7 and metal-oxide-semiconductor Q8, three poles of described optocoupler U1 respectively
The emitter stage of pipe meets the colelctor electrode of the audion of described optocoupler U2, the grounded emitter of the audion of described optocoupler U2, described MOS
Pipe Q7 and the source ground of metal-oxide-semiconductor Q8, the drain electrode of described metal-oxide-semiconductor Q7 and metal-oxide-semiconductor Q8 connects described every commonly through described resistance R5
The base stage of the audion Q1 of individual control for brake branch road 41, the emitter stage of described audion Q4 connects power supply, the collection of described audion Q4
Electrode connects the negative electrode of described diode D1 by described resistance R4, and the anode of described diode D1 connects the current collection of described audion Q1
Pole, the grounded emitter of described audion Q1, the anode of described diode D1 and negative electrode connect described 3 relay RY1's respectively
Coil two ends.
The ultimate principle of brshless DC motor braking is mutually to connect machine winding.Due on brushless DC motor rotor
Equipped with permanent magnet, when motor coast, phase winding can produce induced voltage, in the presence of induced voltage, in machine winding
Produce faradic current.Machine winding has resistance in itself, and when there being electric current to pass through in winding, machine winding can be generated heat.So will
Rotor mechanical energy is converted into machine winding heat energy, and then realizes braking.
For high-voltage high-speed motor, rated voltage is more than 300V, generally below 1 ohm of winding resistance.So, braking
An instantaneous faradic current more than 100A can be produced in winding in journey, this electric current not only can motor damage phase winding, also can make
Become the demagnetization of motor permanent magnet.
For this reason, this utility model to control brake squeal electric current using braking resistor R1.As shown in figure 1, working as motor braking
When, the three-phase windings 1 of brshless DC motor mutually short circuit again of each connecting after braking resistor R1 gets up.Thus can root
Rated voltage according to motor selects braking resistor R1 of suitable resistance, and then stalling current is controlled in zone of reasonableness it is ensured that electricity
Machine permanent magnet does not demagnetize.Simultaneously as the resistance of braking resistor R1 is much larger than motor phase windings resistance, produce during braking
The most of loss of energy and then protects motor phase windings not to be burned out in brake resistor.Realized to motor by braking resistor R1
Faradic control during braking.
Consider the requirement about reliability in product Safety Approval, that is, in circuit, any single element is damaged it is impossible to affect
Braking ability.Braking circuit takes Redundancy Design.Two components and parts are set on each electric loop, prevent because single
Component failure and cause brake fade.
Optocoupler U1, U2 form redundancy pair.If node C input low level, even if any of which optocoupler damages, also can ensure
Node A exports high level.
Metal-oxide-semiconductor Q7, metal-oxide-semiconductor Q8 form redundancy pair.If node A is high level, even if any of which metal-oxide-semiconductor damages, also
Node B output low level can be ensured.
Audion Q1, audion Q4 form redundancy pair.The node A output high level low electricity of node B output simultaneously when circuit
At ordinary times, even if arbitrary audion damages, also can ensure that relay RY1 winding ends, so ensure that machine winding and system
Galvanic electricity resistance R1 connects.
The operation principle of other control for brake branch roads 41 is the same, repeats no more here.
To sum up, when brake signal gives (node C input low level), in circuit any single element along bad all without
Impact machine winding and the connection of braking resistor, equally would not affect the braking of motor.
In this utility model embodiment, brshless DC motor braking circuit include brshless DC motor three-phase windings,
Motor driver, switch, braking resistor R1 and brak control unit, motor driver and brak control unit are kept completely separate, when
During motor braking, electric current does not flow through motor driver, thus without causing the damage to motor driver and motor permanent magnetism
The problem of body demagnetization.
The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model, all this
Any modification, equivalent and improvement made within the spirit of utility model and principle etc., should be included in this utility model
Protection domain within.
Claims (6)
1. a kind of brshless DC motor braking circuit, the three-phase windings including brshless DC motor are it is characterised in that described brushless
Direct current generator braking circuit also includes：
The motor driver being connected with the three-phase windings of described brshless DC motor respectively；
It is connected to 3 switches between described motor driver and the three-phase windings of described brshless DC motor；
3 braking resistors R1, the first end of described 3 braking resistors R1 connects described 3 switches, described 3 braking resistors respectively
Second end of R1 connects jointly；
The brak control unit being connected with described 3 switches respectively.
2. brshless DC motor braking circuit as claimed in claim 1 is it is characterised in that described 3 switches are respectively adopted 3
The switch moved end of relay RY1, described each relay RY1 connects the three-phase windings of described brshless DC motor respectively, described every
Switch first fixed end of individual relay RY1 connects the first end of described 3 braking resistors R1 respectively, described each relay RY1's
Switch the second fixed end and connect described motor driver respectively.
3. brshless DC motor braking circuit as claimed in claim 2 is it is characterised in that described brak control unit includes：
3 control for brake branch roads, optocoupler U1, optocoupler U2, metal-oxide-semiconductor Q7, metal-oxide-semiconductor Q8, each control for brake branch road described includes three
Pole pipe Q1, audion Q4, resistance R4, resistance R5, resistance R6 and diode D1；
The anode of light emitting diode of described optocoupler U1 and optocoupler U2 and negative electrode connect brake signal end respectively, and the three of described optocoupler U1
The colelctor electrode of pole pipe connects the base stage of the audion Q4 of each control for brake branch road described, described optocoupler respectively by described resistance R6
The colelctor electrode of the audion of U1 also connects the grid of described metal-oxide-semiconductor Q7 and metal-oxide-semiconductor Q8, the transmitting of the audion of described optocoupler U1 respectively
Pole connects the colelctor electrode of the audion of described optocoupler U2, the grounded emitter of the audion of described optocoupler U2, described metal-oxide-semiconductor Q7 and
The source ground of metal-oxide-semiconductor Q8, the drain electrode of described metal-oxide-semiconductor Q7 and metal-oxide-semiconductor Q8 connects each braking described commonly through described resistance R5
The base stage of the audion Q1 of controlling brancher, the emitter stage of described audion Q4 connects power supply, and the colelctor electrode of described audion Q4 passes through
Described resistance R4 connects the negative electrode of described diode D1, and the anode of described diode D1 connects the colelctor electrode of described audion Q1, described
The grounded emitter of audion Q1, the anode of described diode D1 and negative electrode connect the coil two of described 3 relay RY1 respectively
End.
4. a kind of brshless DC motor, described brshless DC motor include brshless DC motor three-phase windings it is characterised in that
Described brshless DC motor braking circuit also includes：
The motor driver being connected with the three-phase windings of described brshless DC motor respectively；
It is connected to 3 switches between described motor driver and the three-phase windings of described brshless DC motor；
3 braking resistors R1, the first end of described 3 braking resistors R1 connects described 3 switches, described 3 braking resistors respectively
Second end of R1 connects jointly；
The brak control unit being connected with described 3 switches respectively.
5. brshless DC motor as claimed in claim 4 is it is characterised in that described 3 switches are respectively adopted 3 relays
The switch moved end of RY1, described each relay RY1 connects the three-phase windings of described brshless DC motor, each relay described respectively
Switch first fixed end of device RY1 connects the first end of described 3 braking resistors R1, the switch of described each relay RY1 respectively
Two fixed ends connect described motor driver respectively.
6. brshless DC motor as claimed in claim 5 is it is characterised in that described brak control unit includes：
3 control for brake branch roads, optocoupler U1, optocoupler U2, metal-oxide-semiconductor Q7, metal-oxide-semiconductor Q8, each control for brake branch road described includes three
Pole pipe Q1, audion Q4, resistance R4, resistance R5, resistance R6 and diode D1；
The anode of light emitting diode of described optocoupler U1 and optocoupler U2 and negative electrode connect brake signal end respectively, and the three of described optocoupler U1
The colelctor electrode of pole pipe connects the base stage of the audion Q4 of each control for brake branch road described, described optocoupler respectively by described resistance R6
The colelctor electrode of the audion of U1 also connects the grid of described metal-oxide-semiconductor Q7 and metal-oxide-semiconductor Q8, the transmitting of the audion of described optocoupler U1 respectively
Pole connects the colelctor electrode of the audion of described optocoupler U2, the grounded emitter of the audion of described optocoupler U2, described metal-oxide-semiconductor Q7 and
The source ground of metal-oxide-semiconductor Q8, the drain electrode of described metal-oxide-semiconductor Q7 and metal-oxide-semiconductor Q8 connects each braking described commonly through described resistance R5
The base stage of the audion Q1 of controlling brancher, the emitter stage of described audion Q4 connects power supply, and the colelctor electrode of described audion Q4 passes through
Described resistance R4 connects the negative electrode of described diode D1, and the anode of described diode D1 connects the colelctor electrode of described audion Q1, described
The grounded emitter of audion Q1, the anode of described diode D1 and negative electrode connect the coil two of described 3 relay RY1 respectively
End.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620815291.4U CN205992866U (en) | 2016-07-29 | 2016-07-29 | A kind of brshless DC motor braking circuit and brshless DC motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620815291.4U CN205992866U (en) | 2016-07-29 | 2016-07-29 | A kind of brshless DC motor braking circuit and brshless DC motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205992866U true CN205992866U (en) | 2017-03-01 |
Family
ID=58106052
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620815291.4U Withdrawn - After Issue CN205992866U (en) | 2016-07-29 | 2016-07-29 | A kind of brshless DC motor braking circuit and brshless DC motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205992866U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106026789A (en) * | 2016-07-29 | 2016-10-12 | 捷和电机制品(深圳)有限公司 | Brushless DC motor braking circuit and brushless DC motor |
| CN110392777A (en) * | 2017-03-06 | 2019-10-29 | 黑拉有限责任两合公司 | Purging pumping system with emergent stopping |
-
2016
- 2016-07-29 CN CN201620815291.4U patent/CN205992866U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106026789A (en) * | 2016-07-29 | 2016-10-12 | 捷和电机制品(深圳)有限公司 | Brushless DC motor braking circuit and brushless DC motor |
| CN106026789B (en) * | 2016-07-29 | 2018-08-24 | 捷和电机制品(深圳)有限公司 | A kind of brshless DC motor braking circuit and brshless DC motor |
| CN110392777A (en) * | 2017-03-06 | 2019-10-29 | 黑拉有限责任两合公司 | Purging pumping system with emergent stopping |
| CN110392777B (en) * | 2017-03-06 | 2021-11-30 | 黑拉有限责任两合公司 | Purge pump system with emergency stop |
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| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170301 Effective date of abandoning: 20180824 |