CN205490265U - No hall sensor DC Brushless motor square wave drive arrangement - Google Patents
No hall sensor DC Brushless motor square wave drive arrangement Download PDFInfo
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- CN205490265U CN205490265U CN201620211229.4U CN201620211229U CN205490265U CN 205490265 U CN205490265 U CN 205490265U CN 201620211229 U CN201620211229 U CN 201620211229U CN 205490265 U CN205490265 U CN 205490265U
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Abstract
The utility model relates to a no hall sensor DC Brushless motor square wave drive arrangement has power, dc -to -ac converter to and the control signal receiver that connects gradually, MCU arithmetic unit and PWM, the input of the output termination dc -to -ac converter of power, the output termination DC Brushless motor's of dc -to -ac converter input, the input termination internal current reading device and the electric motor rotor speed position feedback device of MCU arithmetic unit, electric motor rotor speed position feedback device is including forcing the commutation device, force the commutation device to start unit, compulsory positioning unit, force commutation unit, commutation position to observe estimation unit and parameter of electric machine operation unit form by the control signal who connects gradually. The utility model discloses can solve no hall sensor DC Brushless motor square wave drive arrangement moment when low -speed starts little with the big defect of vibration, make the motor start to become and effectively strengthen the start -up force moment of motor gentle and agreeable the time, be fit for more market and use.
Description
Technical field
This utility model relates to DC brushless motor technical field, particularly to a kind of without Hall element
DC brushless motor square wave drive device.
Background technology
Along with the continuous renewal of electronic technology develops, the range of application of DC brushless motor is increasingly wider,
Market usage amount is increasing, and motor manufacturing technology also constantly retrofit, this just requires corresponding
Motor driver simplify better and better.
The most most square wave drive device of DC brushless motor without Hall element all exists
The defects such as low rate start moment is little, vibration is big, thus affect its popularization and use.
Summary of the invention
The purpose of this utility model is the defect overcoming prior art to exist, it is provided that one can solve
The square wave drive device of DC brushless motor without Hall element moment when low rate start is little and vibration is big
Defect, make electric motor starting become submissive while the staring torque of effective expanded motor, be suitable for more
The DC brushless motor without Hall element of market application.
The technical scheme realizing this utility model purpose is: a kind of without Hall element DC brushless motor
Square wave drive device, has power supply, an inverter, and be sequentially connected with control signal receptor, MCU
Arithmetical unit and PWM；The input of the output termination inverter of described power supply；The outfan of described inverter
Connect the input of DC brushless motor；The input termination internal current reading device of described MCU arithmetical unit
With motor rotor speed/position feedback device；Described motor rotor speed/position feedback device includes by force
Commutation device processed；Described pressure commutation device is fixed by the control signal start unit being sequentially connected with, pressure
Bit location, pressure commutation unit, commutation position detection evaluation unit and parameter of electric machine running unit composition.
The position of the back-EMF determination in motor rotor speed/position feedback device described in technique scheme
Put three branch roads that observation circuit includes being connected respectively with three-phase electricity U, V, W；Every branch road all includes
First resistance, the second resistance, audion and the 3rd resistance；Described first resistance and the second resistant series
It is followed by the colelctor electrode of audion；The grounded emitter of described audion, colelctor electrode meets the one of the 3rd resistance
End；Article three, the other end of the 3rd resistance of branch road is connected；First resistance of each branch road and the second resistance
Common port all by corresponding pull down resistor ground connection；The two ends of each pull down resistor are all parallel with correspondence
Electric capacity.
Using after technique scheme, this utility model has a following positive effect:
(1) this utility model can solve to exist without Hall element DC brushless motor square wave drive device
During low rate start, moment is little and the big defect of vibration, make electric motor starting become submissive while effectively strengthen
The staring torque of motor, is suitable for the application of more market.
(2) this utility model is forced commutation device by increasing and improves the position detection of back-EMF determination
Circuit effectively reduces vibration during electric motor starting, and significantly improves motor low rate start moment, before making
The square wave drive device of DC brushless motor without Hall element that may be only available for low-power load startup obtains
It is generalized to more application, it might even be possible to drive with traditional Hall sensor motor that has to extend
Mode compares favourably, but the production method of motor is simpler, installs more convenient, simultaneously motor driver
Integrated level the most more high stability is more preferable.
Accompanying drawing explanation
In order to make content of the present utility model be easier to be clearly understood, below according to specific embodiment
And combine accompanying drawing, this utility model is described in further detail, wherein
Fig. 1 is structural representation of the present utility model；
Fig. 2 is the schematic diagram of pressure commutation device of the present utility model；
Fig. 3 is the position detection circuit diagram of back-EMF determination of the present utility model；
Accompanying drawing is numbered: power supply 1, inverter 2, control signal receptor 3, MCU arithmetical unit 4,
PWM5, DC brushless motor 6, internal current reading device 7, motor rotor speed/position feedback dress
Put 8, force commutation device 9, control signal start unit 10, pressure positioning unit 11, pressure to be changed
Facies unit 12, commutation position detection evaluation unit 13, parameter of electric machine running unit the 14, first resistance
15, the second resistance 16, audion the 17, the 3rd resistance 1, pull down resistor 19, electric capacity 20.
Detailed description of the invention
(embodiment 1)
See that Fig. 1 to Fig. 3, this utility model have power supply 1, inverter 2, and the control being sequentially connected with
Signal receiver 3 processed, MCU arithmetical unit 4 and PWM5；The input of the output termination inverter 2 of power supply 1
End；The input of the output termination DC brushless motor 6 of inverter 2；The input of MCU arithmetical unit 4
Connect internal current reading device 7 and motor rotor speed/position feedback device 8；Motor rotor speed/
Position feedback device 8 includes forcing commutation device 9；Force commutation device 9 by the control letter being sequentially connected with
Number start unit 10, force positioning unit 11, force commutation unit 12, commutation position detection pro form bill
Unit 13 and parameter of electric machine running unit 14 form.
The position detection circuit of the back-EMF determination in motor rotor speed/position feedback device 8 includes point
Three branch roads not being connected with three-phase electricity U, V, W；Every branch road all includes the first resistance 15, second
Resistance 16, audion 17 and the 3rd resistance 18；First resistance 15 and the series connection of the second resistance 16 are followed by
The colelctor electrode of audion 17；The grounded emitter of audion 17, colelctor electrode meets the one of the 3rd resistance 18
End；Article three, the other end of the 3rd resistance 18 of branch road is connected；First resistance 15 of each branch road and
The common port of two resistance 16 is all by corresponding pull down resistor 19 ground connection；The two ends of each pull down resistor 19
All it is parallel with the electric capacity 20 of correspondence.
Operation principle of the present utility model is:
1, DC supply input, is converted to internal circuit work through DC-DC and provides running voltage；
2, according to control signal requirement, motor enters forces station-keeping mode, allows motor initially enter preparation
Running status (and electric motor starting phase place of system default), that causes during for reducing forced motor location trembles
Dynamic phenomenon, it is fixed that the electric current applied when we are by the location of motor uses the mode slowly risen to be finally reached
The purpose of position also reduces the shake of motor simultaneously；
3, enter after forced motor has positioned and force commutation pattern to allow motor start slowly to operate, pass through
After motor position observer calculates the optimal commutation position of motor, system exits pressure commutation pattern, this
The design at place can effectively increase the staring torque of motor makes startup become submissive simultaneously.
Particular embodiments described above, to the purpose of this utility model, technical scheme and beneficial effect
Further described, be it should be understood that the foregoing is only of the present utility model specifically
Embodiment, is not limited to this utility model, all spirit of the present utility model and principle it
In, any modification, equivalent substitution and improvement etc. done, should be included in protection of the present utility model
Within the scope of.
Claims (2)
1., without Hall element DC brushless motor square wave drive device, there is power supply (1), inverter
(2), and be sequentially connected with control signal receptor (3), MCU arithmetical unit (4) and PWM (5)；
The input of output termination inverter (2) of described power supply (1)；The output of described inverter (2)
The input of termination DC brushless motor (6)；The input termination of described MCU arithmetical unit (4) is internal
Current reading device (7) and motor rotor speed/position feedback device (8)；It is characterized in that: institute
State motor rotor speed/position feedback device (8) to include forcing commutation device (9)；Described pressure is changed
Phase device (9) by the control signal start unit (10) being sequentially connected with, force positioning unit (11),
Force commutation unit (12), commutation position detection evaluation unit (13) and parameter of electric machine running unit (14)
Composition.
The square wave drive device of DC brushless motor without Hall element the most according to claim 1,
It is characterized in that: the position of the back-EMF determination in described motor rotor speed/position feedback device (8)
Put three branch roads that observation circuit includes being connected respectively with three-phase electricity U, V, W；Every branch road all includes
First resistance (15), the second resistance (16), audion (17) and the 3rd resistance (18)；Described
One resistance (15) and the second resistance (16) series connection are followed by the colelctor electrode of audion (17)；Described three
The grounded emitter of pole pipe (17), colelctor electrode connects one end of the 3rd resistance (18)；Article three, branch road
The other end of the 3rd resistance (18) is connected；First resistance (15) of each branch road and the second resistance (16)
Common port all by corresponding pull down resistor (19) ground connection；The two ends of each pull down resistor (19) are equal
It is parallel with the electric capacity (20) of correspondence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620211229.4U CN205490265U (en) | 2016-03-17 | 2016-03-17 | No hall sensor DC Brushless motor square wave drive arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620211229.4U CN205490265U (en) | 2016-03-17 | 2016-03-17 | No hall sensor DC Brushless motor square wave drive arrangement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205490265U true CN205490265U (en) | 2016-08-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620211229.4U Active CN205490265U (en) | 2016-03-17 | 2016-03-17 | No hall sensor DC Brushless motor square wave drive arrangement |
Country Status (1)
| Country | Link |
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| CN (1) | CN205490265U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105723611A (en) * | 2013-11-12 | 2016-06-29 | 株式会社电装 | Drive control device and fuel pump driving system |
| CN113507244A (en) * | 2021-06-08 | 2021-10-15 | 捷和电机制品(深圳)有限公司 | Motor control method and device and electronic equipment |
-
2016
- 2016-03-17 CN CN201620211229.4U patent/CN205490265U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105723611A (en) * | 2013-11-12 | 2016-06-29 | 株式会社电装 | Drive control device and fuel pump driving system |
| CN105723611B (en) * | 2013-11-12 | 2017-10-20 | 株式会社电装 | Drive dynamic control device and fuel pump drive system |
| CN113507244A (en) * | 2021-06-08 | 2021-10-15 | 捷和电机制品(深圳)有限公司 | Motor control method and device and electronic equipment |
| CN113507244B (en) * | 2021-06-08 | 2023-05-23 | 捷和电机制品(深圳)有限公司 | Motor control method and device and electronic equipment |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |