CN207950041U - A kind of driving of electric wheelchair using brushless motor driving and braking circuit - Google Patents
A kind of driving of electric wheelchair using brushless motor driving and braking circuit Download PDFInfo
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- CN207950041U CN207950041U CN201720758361.1U CN201720758361U CN207950041U CN 207950041 U CN207950041 U CN 207950041U CN 201720758361 U CN201720758361 U CN 201720758361U CN 207950041 U CN207950041 U CN 207950041U
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Abstract
A kind of driving of electric wheelchair using brushless motor driving disclosed by the utility model and braking circuit, including electric wheelchair and a pair of of deflecting roller that chair frame bottom is arranged in the electric wheelchair and a pair of of power wheel, each power wheel is by a three-phase brushless motor driving and braking, an operation handle is provided in the chair frame of the electric wheelchair, three-phase brushless motor driving and braking circuit are provided in operation handle, driving circuit controls the A in three-phase brushless motor, B, C three-phase coil rotations are powered and the change current direction drives three-phase brushless motor to rotate；If closing power supply, A, B, C three-phase coil all no powers in three-phase brushless motor, driving wheel is with regard to free to rotate；If being only added a not nyctitropic voltage wherein one, three-phase brushless motor is at locking state.The utility model eliminates external brake, further mitigates the weight of electric wheelchair, reduces cost.
Description
Technical field
The utility model is related to electric wheelchair technical field more particularly to a kind of electric wheelchairs driven using brushless motor
Driving and braking circuit.
Background technology
Wheelchair is lower limb physical disabilities and the indispensable walking-replacing tool of old and frail people.Most of wheelchairs are by multiplying
Member's both hands drive trailing wheel to travel, and also have direct current motor driven electric wheelchair or electric wheel-chair vehicle.Electric wheel-chair vehicle is one
Kind is using accumulator as the energy, the power wheel Wheel-chair of electronic device control driving.User can pass through control device voluntarily driving wheel
Wheel-chair is advanced.
Each power wheel in existing electric wheelchair has a motor to be driven by reduction gear, however is used for
Drive the load pressure of the coil of motor of power wheel, carbon brush and gear big, service life is short, and existing dynamic for driving
The volume of the motor of wheels is larger, causes electric wheelchair very heavy.
Brshless DC motor is made of motor body and driver, is a kind of typical electromechanical integrated product.Due to
Brushless direct current motor is run with autocontrol, so will not turn as the synchronous motor of heavy load starting under frequency control
Another plus startup winding, will not generate oscillation and step-out in load sudden change on son.The brushless direct current motor of Small And Medium Capacity
Permanent magnet mostly uses rare-earth Nd-Fe-B (Nd-Fe-B) material of high energy product now.Therefore, rare earth permanent magnetic brushless motor
Volume ratio reduces a seat No. with capacity threephase asynchronous.
Brushless motor has the following advantages that compared with brush motor：
1, brushless, low interference
Brushless motor eliminates brush, and most directly variation is exactly the electric spark generated when being operated without brush motor,
Thus greatly reduce interference of the electric spark to remote-control radio electric equipment.
2, low noise, smooth movements
Brushless motor is without brush, and frictional force greatly reduces when operating, and operation is smooth, and noise can be much lower, this is excellent
Point is a huge support for model running stability.
3, long lifespan, low-maintenance cost
Brush is lacked, the abrasion of brushless motor is mainly on bearing, and from a mechanical point of view, brushless motor is almost one
The non-maintaining motor of kind when necessary, need to only do some dedustings maintenance.
In addition, the brake of existing electric wheelchair is typically all to be carried out using external brake, by pulling external brake
It brakes, operates very inconvenient, and increase the middle weight that external brake also increases electric wheelchair
For this purpose, applicant carried out beneficial exploration and trial, a kind of completely new driving collection braking circuit is applied to brushless
On motor-driven electric wheelchair, technical solution described below generates in this background.
Utility model content
The technical problem to be solved by the utility model is to：In order to overcome existing electric wheelchair external brake to be deposited
Inconvenient for operation, the bulky defect of electric wheelchair, a kind of driving of the electric wheelchair driven using brushless motor is now provided
With braking circuit, cancel external brake so that electric wheelchair operation is more convenient, and the weight of electric wheelchair reduces, more
It is light.
Following technical scheme can be used to realize in technical problem to be solved in the utility model：
A kind of driving of electric wheelchair using brushless motor driving and braking circuit, including driving circuit, the driving
Circuit includes a driving chip, six driving triodes, six diodes, is in addition arranged in the peritrochanteric of the brushless motor
Three Hall sensors, the output end of three Hall sensors connect with three hall signal input terminals on the driving chip
It connects, six driving triodes are divided into the first to the 6th driving triode, and six diodes are divided into the first to the 6th diode, described
The base stage of first to the 6th driving triode is connect with six driving signal output ends of the driving chip respectively, and first to the
The both ends of six diodes are connected on the collector and emitting stage of the first to the 6th driving triode, wherein first to the 6th
The anode of diode is connect with the emitting stage of the first to the 6th driving triode respectively, the cathode difference of the first to the 6th diode
It is connect with the current collection grade of the first to the 6th driving triode；The first driving triode, the second driving triode, third driving
The collector of triode, which links together, connects the anode of DC power supply, the 4th driving triode, the 5th driving triode, the
The emitter of six driving triodes, which links together, connects the cathode of DC power supply；Coil in three-phase brushless motor is divided into A, B, C
Three-phase coil, A, B, C three-phase coil are connected using star connection, and one end of the A phase coils is driven with described first
The collector connection of the emitter of dynamic triode and the 6th driving triode, one end of the B phase coils drives with described second
The collector connection of the emitter of triode and the 5th driving triode, one end and the third of the C phase coils drive three
The collector connection of the emitter of grade pipe and the 4th driving triode；
A, B, C three-phase coil rotation in the driving circuit control three-phase brushless motor is powered and the change electric current side
Always driving three-phase brushless motor rotation；If closing power supply, A, B, C three-phase coil all no powers in three-phase brushless motor,
Driving wheel is with regard to free to rotate；If being only added a not nyctitropic voltage wherein one, three-phase brushless motor, which is at, to be embraced
Death situation state.
As a result of technical solution as above, the beneficial effects of the utility model are：The driving of the utility model with
A, B, C three-phase coil rotation in braking circuit control three-phase brushless motor is powered and the change current direction drives three-phase
Brushless motor rotates, driving power wheel rotation.If closing power supply, A, B, C three-phase coil in three-phase brushless motor are all obstructed
Electricity, power wheel are carried out getting up manually more laborsaving with regard to free to rotate.If being only added a not nyctitropic electricity wherein one
Pressure, three-phase brushless motor are at locking state, and external force is difficult that it is made to rotate, and plays braking effect so that the utility model
External brake is eliminated, the weight of electric wheelchair is further mitigated, reduces cost.
Description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, other drawings may also be obtained based on these drawings.
Fig. 1 is the driving circuit principle schematic diagram of the utility model.
Specific implementation mode
In order to make the technical means, creative features, achievement of purpose, and effectiveness of the utility model be easy to understand, under
Face combines and is specifically illustrating, and the utility model is expanded on further.
A kind of driving of electric wheelchair using brushless motor driving disclosed by the utility model and braking circuit, including electricity
Wheelchair and a pair of of the deflecting roller and a pair of power wheel that chair frame bottom is arranged in electric wheelchair, each power wheel is by one three
Phase brushless motor drives and braking, and an operation handle is provided in the chair frame of the electric wheelchair, is provided in operation handle
One three-phase brushless motor drives and braking circuit.
Referring to Fig. 1, three-phase brushless motor driving and braking circuit include a driving chip MCU, driving triode Q1~
Q6, diode D1~D6, are in addition arranged three Hall sensor T1~T3 around the rotor of three-phase brushless motor 412, three
The output end of Hall sensor T1~T3 is connect with three hall signal input terminal IC1~IC3 on driving chip MCU.
Drive the base stage of triode Q1~Q6 respectively with six driving signal output end PWM1 of driving chip MCU~
The both ends of PWM6 connections, diode D1~D6 are connected on the collector and emitting stage of driving triode Q1~Q6, wherein
The anode of diode D1~D6 is connect with the emitting stage of driving triode Q1~Q6 respectively, the cathode difference of diode D1~D6
It is connect with the current collection grade of driving triode Q1~Q6.
The collector of driving triode Q1~Q3, which links together, connects the anode of DC power supply DC, and driving triode Q4~
The emitter of Q6, which links together, connects the cathode of DC power supply DC.
Coil in three-phase brushless motor is divided into A, B, C three-phase coil, and A, B, C three-phase coil are connected using star connection
To come, one end of A phase coils is connect with the collector of the emitter of driving triode Q1 and driving triode Q6, and the one of B phase coils
The collector with the emitter of driving triode Q2 and driving triode Q5 is held to connect, one end and the driving triode of C phase coils
The emitter of Q3 is connected with the collector of driving triode Q4.
A, B, C three-phase coil rotation in above-mentioned driving circuit control three-phase brushless motor is powered and the change electric current side
Always driving three-phase brushless motor rotation, driving power wheel rotation.If closing power supply, A, B, C tri- in three-phase brushless motor
Phase coil all no powers, power wheel are carried out getting up manually more laborsaving with regard to free to rotate.If being only added one wherein one
Not nyctitropic voltage, three-phase brushless motor are at locking state, and external force is difficult that it is made to rotate, and plays braking effect, makes
It obtains the utility model and eliminates external brake, further mitigate the weight of electric wheelchair, reduce cost.
The advantages of basic principles and main features and the utility model of the utility model have been shown and described above.One's own profession
The technical staff of industry is it should be appreciated that the present utility model is not limited to the above embodiments, described in above embodiments and description
Only illustrate the principles of the present invention, on the premise of not departing from the spirit and scope of the utility model, the utility model is also
It will have various changes and improvements, these various changes and improvements fall within the scope of the claimed invention.The utility model
Claimed range is defined by the appending claims and its equivalent thereof.
Claims (1)
1. a kind of driving of electric wheelchair using brushless motor driving and braking circuit, which is characterized in that including driving circuit,
The driving circuit includes a driving chip, six driving triodes, six diodes, in addition in the rotor of the brushless motor
Three Hall sensors are arranged in surrounding, and the output end of three Hall sensors and three hall signals on the driving chip are defeated
Enter end connection, six driving triodes are divided into the first to the 6th driving triode, and six diodes are divided into the first to the 6th 2 pole
The base stage of pipe, the described first to the 6th driving triode is connect with six driving signal output ends of the driving chip respectively,
The both ends of first to the 6th diode are connected on the collector and emitting stage of the first to the 6th driving triode, wherein the
The anode of one to the 6th diode is connect with the emitting stage of the first to the 6th driving triode respectively, the first to the 6th diode
Cathode is connect with the current collection grade of the first to the 6th driving triode respectively；It is described first driving triode, second driving triode,
The collector of third driving triode, which links together, connects the anode of DC power supply, the 4th driving triode, the 5th driving
Triode, the 6th drive the emitter of triode to link together and connect the cathode of DC power supply；Coil in three-phase brushless motor
It is divided into A, B, C three-phase coil, A, B, C three-phase coil is connected using star connection, one end of the A phase coils and institute
State the first driving triode emitter and the 6th driving triode collector connection, one end of the B phase coils with it is described
The collector connection of the emitter of second driving triode and the 5th driving triode, one end of the C phase coils and described the
The collector connection of the emitter of three driving triodes and the 4th driving triode；
A, B, C three-phase coil rotation in the driving circuit control three-phase brushless motor is powered and changes current direction to drive
Dynamic three-phase brushless motor rotation；If closing power supply, A, B, C three-phase coil all no powers in three-phase brushless motor, driving wheel
With regard to free to rotate；If being only added a not nyctitropic voltage wherein one, three-phase brushless motor is at locking state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720758361.1U CN207950041U (en) | 2017-06-27 | 2017-06-27 | A kind of driving of electric wheelchair using brushless motor driving and braking circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720758361.1U CN207950041U (en) | 2017-06-27 | 2017-06-27 | A kind of driving of electric wheelchair using brushless motor driving and braking circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207950041U true CN207950041U (en) | 2018-10-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720758361.1U Active CN207950041U (en) | 2017-06-27 | 2017-06-27 | A kind of driving of electric wheelchair using brushless motor driving and braking circuit |
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| CN (1) | CN207950041U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107343833A (en) * | 2017-06-27 | 2017-11-14 | 上海互邦智能康复设备股份有限公司 | The brake method and driving and braking circuit of a kind of electric wheelchair using brushless electric machine driving |
| TWI673045B (en) * | 2018-10-17 | 2019-10-01 | 財團法人工業技術研究院 | Electric wheelchair control system and electric wheelchair control method |
-
2017
- 2017-06-27 CN CN201720758361.1U patent/CN207950041U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107343833A (en) * | 2017-06-27 | 2017-11-14 | 上海互邦智能康复设备股份有限公司 | The brake method and driving and braking circuit of a kind of electric wheelchair using brushless electric machine driving |
| TWI673045B (en) * | 2018-10-17 | 2019-10-01 | 財團法人工業技術研究院 | Electric wheelchair control system and electric wheelchair control method |
| US11123244B2 (en) | 2018-10-17 | 2021-09-21 | Industrial Technology Research Institute | Electric wheelchair control system and electric wheelchair control method |
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