CN206164417U - Control device for brushless motor - Google Patents
Control device for brushless motor Download PDFInfo
- Publication number
- CN206164417U CN206164417U CN201621051596.9U CN201621051596U CN206164417U CN 206164417 U CN206164417 U CN 206164417U CN 201621051596 U CN201621051596 U CN 201621051596U CN 206164417 U CN206164417 U CN 206164417U
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- China
- Prior art keywords
- rotor
- motor
- brushless
- transverter
- power transistor
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Abstract
The utility model relates to a motor control technology field, in particular to control device for brushless motor, the utility model discloses a brushless DC motor and the defeated entry control mechanism of setting in brushless DC motor, defeated entry control mechanism includes power supply unit and the controller that is connected, the power supply unit includes power input end, transverter, rotor -position sensor and dc -to -ac converter trigger circuit, the utility model discloses in, power input end output voltage changes into the three phase voltage through the transverter and drives brushless DC motor, and the transverter provides PWM ( pulse width modulation ) as the switch of control flow through brushless DC motor's coil, controller, through rotor -position sensor response brushless DC motor's the present position of rotor, decides to open power transistor's in (closing) transverter order according to the stator wire winding, the utility model discloses simple structure, control is convenient, still can maintain certain speed by controlling rotor at the rated load within range during as load changes.
Description
Technical field
The utility model is related to motor control technology field, more particularly to a kind of brushless motor control device.
Background technology
In brushless electric machine sensorless strategy, need to detect the counter electromotive force of motor.The purpose of detection is
Extracting the crossover point signal of counter electromotive force carries out motor commutation operation, and general conventional scheme is to motor using hardware comparator
Counter electromotive force and central point signal are compared, and obtain the upset of comparator crossover point signal.And controlling operating brushless electricity
All with PWM clutter and other noise jammings, needs are filtered process to machine counter electromotive force.It is most simple conventional effective
Method is exactly to pass through RC low-pass filter circuits by noise filtering.More pure back-emf signal can thus be obtained to enter into
Comparator.
At present, RC low-pass filter circuits can produce certain delayed phase to signal, and with the increasing of frequency input signal
Large time delay effect is more serious.Existing brushless electric machine counter electromotive force filter circuit is all the RC low-pass filter circuits of preset parameter,
I.e. time constant is fixed, and the noise on counter electromotive force can be preferably filtered in electric motor starting, and comparator output is also more stable.
But because RC filtering parameters are fixed, when improving with motor speed, counter electromotive force phase is delayed more serious, when delayed phase angle
After more than 30 degree, cause motor commutation delayed, be unfavorable for that motor normally runs.Can be to a certain degree after RC filter factors are reduced
It is upper to reduce the angle of phase lag signal, but can cause that noise cannot be effective filtered out when starting, comparator output is unstable,
Difficulty in starting is caused, so current fixed RC parametric filterings scheme between the two cannot be preferable in electric motor starting and high-speed cruising
Take into account.
Utility model content
Described above in order to overcome the shortcomings of, the purpose of this utility model is to provide a kind of brushless motor control device, its
Simple structure, it is easy to control, can still control the speed that rotor remains certain when the load in rated load ranges.
The technical scheme in the invention for solving the technical problem is：
A kind of brushless motor control device, wherein, including brshless DC motor and be arranged in the brshless DC motor
Input controlling organization, the input controlling organization includes the power supply unit that is connected and controller, and the power supply unit includes power supply
Input, transverter, rotor-position sensor and inverter triggers circuit, the power input is connected with transverter, described
Transverter is connected respectively with the brshless DC motor, inverter triggers circuit, the brshless DC motor and the rotor position
Sensor connection is put, the rotor-position sensor is connected with the inverter triggers circuit；The transverter includes upper arm work(
Rate transistor and lower wall power transistor, the upper arm power transistor includes power transistor Q1, the power crystalline substance being connected in parallel
Body pipe Q3, power transistor Q5, the underarm power transistor includes power transistor Q2, the power transistor being connected in parallel
Q4, power transistor Q6.
As a kind of improvement of the present utility model, stator, rotor, fan blade, axle are provided with the brshless DC motor and are used
Jump ring, gear and output shaft, the controller is connected with the rotor, and the stator is connected with the rotor engagement, described turn
Sub to be connected with the fan blade, the main shaft of the rotor connection is connected with the gear, and the gear is blocked by axle with jump ring, institute
State gear to be connected with the output shaft.
Used as further improvement of the utility model, the rotor is provided with clutch shaft bearing with the junction of the controller
And spring washer, rear wind loop is provided between the clutch shaft bearing and the rotor.
Further improve as of the present utility model, wind loop is provided between the rotor and the fan blade, it is described
The main shaft of rotor connection is connected with second bearing, and the two ends of the gear are respectively cooperating with being connected with 3rd bearing and fourth bearing.
In the utility model, power input output voltage, it is brushless straight to drive to change into three-phase voltage through transverter
Stream motor, transverter flows through the switch of the coil of brshless DC motor as control, and controller provides PWM, and (pulse width is adjusted
System), the current position of rotor of brshless DC motor is sensed by rotor-position sensor, determine to open according to stator winding
The order of power transistor in (/ closing) transverter；The utility model simple structure, it is easy to control, in rated load ranges
The speed that rotor remains certain can be still controlled when the load.
Description of the drawings
For ease of explanation, the utility model is described in detail by following preferred embodiments and accompanying drawing.
Fig. 1 is internal structure schematic diagram of the present utility model；
Fig. 2 is the annexation figure of input controlling organization of the present utility model；
Reference：1- brushless motor control devices, 11- brshless DC motors, 111- stators, 112- rotors, 113- wind
Leaf, 114- axle jump rings, 115- gears, 116- output shafts, 117- clutch shaft bearings, 118- spring washers, wind loop after 119-,
1110- wind loops, 1111- second bearings, 1112- 3rd bearings, 1113- fourth bearings, 12- input controlling organizations, 121- is electric
Source portion, 1211- power inputs, 1212- transverters, 1213- rotor-position sensors, 1214- inverter triggers circuits, 122-
Controller.
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 the utility model.It should be appreciated that specific embodiment described herein is only to explain
The utility model, is not used to limit the utility model.
As depicted in figs. 1 and 2, a kind of brushless motor control device 1 of the present utility model, including brshless DC motor 11 and
The input controlling organization 12 being arranged in brshless DC motor 11.
Input controlling organization includes power supply unit 121 and the controller 122 being connected, and power supply unit 121 includes power input
1211st, transverter 1212, rotor-position sensor 1213 and inverter triggers circuit 1214, power input 1211 and transverter
1212 connections, transverter 1212 is connected respectively with brshless DC motor 11, inverter triggers circuit 1214, brshless DC motor 11
It is connected with rotor-position sensor 1213, rotor-position sensor 1213 is connected with inverter triggers circuit 1214.
Transverter 1212 includes upper arm power transistor and lower wall power transistor, and upper arm power transistor includes in parallel company
Power transistor Q1, power transistor Q3, the power transistor Q5 for connecing, underarm power transistor includes that the power being connected in parallel is brilliant
Body pipe Q2, power transistor Q4, power transistor Q6.
In the utility model, the output voltage of power input 1211 changes into three-phase voltage to drive through transverter 1212
Dynamic brshless DC motor 11, transverter 1212 flows through the switch of the coil of brshless DC motor 11 as control, and controller 122 is carried
For PWM (pulse width modulation), the current institute of rotor for sensing brshless DC motor 11 by rotor-position sensor 1213 is in place
Put, the order for opening power transistor in (/ closing) transverter is determined according to stator winding.
As shown in figure 1, brshless DC motor 11 in be provided with stator 111, rotor 112, fan blade 113, axle jump ring 114,
Gear 115 and output shaft 116, controller 122 is connected with rotor 112, and stator 111 is connected with rotor 112, rotor 112 with
Fan blade 113 connects, and the main shaft of the connection of rotor 112 is connected with gear 115, and gear 115 is blocked by axle jump ring 114, gear 115
It is connected with output shaft 116, rotor 112 is rotated around stator 111, gear 115 is stuck in brushless direct-current by axle jump ring 114
In motor 11, output shaft 116 is driven to export power by gear 115.
Further, the junction of rotor 112 and controller 122 is provided with clutch shaft bearing 117 and spring washer 118, and first
Rear wind loop 119 is provided between bearing 117 and rotor 112, clutch shaft bearing 117 is used for fixed rotation, and spring washer 118 is used for
Closing and protective effect, rear wind loop 119 is used for closed protective.
Further, wind loop 1110 is provided between rotor 112 and fan blade 113, the main shaft of the connection of rotor 112 is connected with
Second bearing 1111, the two ends of gear 115 are respectively cooperating with being connected with 3rd bearing 1112 and fourth bearing 1113,3rd bearing
1112 and fourth bearing 1113 can preferably fix swing pinion 115.
Preferred embodiment of the present utility model is the foregoing is only, it is all at this not to limit the utility model
Any modification, equivalent and improvement made within the spirit and principle of utility model etc., should be included in the utility model
Protection domain within.
Claims (4)
1. a kind of brushless motor control device, it is characterised in that including brshless DC motor and be arranged on the brushless dc
Input controlling organization in machine, the input controlling organization includes power supply unit and the controller being connected, and the power supply unit includes
Power input, transverter, rotor-position sensor and inverter triggers circuit, the power input is connected with transverter,
The transverter is connected respectively with the brshless DC motor, inverter triggers circuit, the brshless DC motor with described turn
Sub- position sensor connection, the rotor-position sensor is connected with the inverter triggers circuit；The transverter includes upper
Arm power transistor and underarm power transistor, the upper arm power transistor includes power transistor Q1, the work(being connected in parallel
Rate transistor Q3, power transistor Q5, the underarm power transistor includes power transistor Q2, the power crystal being connected in parallel
Pipe Q4, power transistor Q6.
2. a kind of brushless motor control device according to claim 1, it is characterised in that set in the brshless DC motor
Be equipped with stator, rotor, fan blade, axle jump ring, gear and output shaft, the controller is connected with the rotor, the stator with
The rotor engagement connection, the rotor is connected with the fan blade, and the main shaft of the rotor connection is connected with the gear, described
Gear is blocked by axle with jump ring, and the gear is connected with the output shaft.
3. a kind of brushless motor control device according to claim 2, it is characterised in that the rotor and the controller
Junction be provided with clutch shaft bearing and spring washer, rear wind loop is provided between the clutch shaft bearing and the rotor.
4. a kind of brushless motor control device according to claim 3, it is characterised in that the rotor and the fan blade it
Between be provided with wind loop, the main shaft of the rotor connection is connected with second bearing, and the two ends of the gear are respectively cooperating with being connected with
3rd bearing and fourth bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621051596.9U CN206164417U (en) | 2016-08-30 | 2016-08-30 | Control device for brushless motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621051596.9U CN206164417U (en) | 2016-08-30 | 2016-08-30 | Control device for brushless motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206164417U true CN206164417U (en) | 2017-05-10 |
Family
ID=58651657
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621051596.9U Active CN206164417U (en) | 2016-08-30 | 2016-08-30 | Control device for brushless motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206164417U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109088516A (en) * | 2018-09-20 | 2018-12-25 | 冉隆春 | A kind of energy-saving direct-current motor that stall is not burnt |
-
2016
- 2016-08-30 CN CN201621051596.9U patent/CN206164417U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109088516A (en) * | 2018-09-20 | 2018-12-25 | 冉隆春 | A kind of energy-saving direct-current motor that stall is not burnt |
| CN109088516B (en) * | 2018-09-20 | 2023-07-14 | 冉隆春 | Energy-saving direct-current motor with dead-stop and unfired rotor |
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