CN207884471U - DC brushless motor and electric vehicle - Google Patents
DC brushless motor and electric vehicle Download PDFInfo
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- CN207884471U CN207884471U CN201820339854.6U CN201820339854U CN207884471U CN 207884471 U CN207884471 U CN 207884471U CN 201820339854 U CN201820339854 U CN 201820339854U CN 207884471 U CN207884471 U CN 207884471U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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Abstract
It includes motor body and controller that the utility model, which provides a kind of DC brushless motor and electric vehicle, the DC brushless motor,；Main field sensor and auxiliary magnetic field sensor are provided on motor body；It is additionally provided with multiple magnetoresistive bits in the mechanical structure with rotor rotation of motor body；The position of magnetoresistive bit is corresponding in same level with the position of auxiliary magnetic field sensor；Main field sensor and auxiliary magnetic field sensor are connect with controller respectively；Main field sensor is used to acquire the sector of motor body operation；Auxiliary magnetic field sensor is for acquiring operation angle of the motor body in sector；Controller exports corresponding control signal, to control direction of rotation and the output current of motor body for receiving sector and operation angle.The utility model setting auxiliary magnetic field sensor can increase phase acquisition precision, so as to accurately control the commutation angle in advance of DC brushless motor, while effectively inhibit the peak current generated in motor operation course.
Description
Technical field
The utility model is related to motor control technology fields, more particularly, to a kind of DC brushless motor and electric vehicle.
Background technology
Along with the rapid development of national new energy pure electric vehicle, the control technology of electric vehicle DC brush-less motor and its production
Product are used widely, and Control Technology for Brushless DC Electromotor plays a key effect to the development of electric vehicle.
DC brushless motor is run in the ideal situation, and when motor speed is higher than rated speed, motor torque can be with
The increase of motor speed and reduce, due to being limited by voltage saturation, DC brushless motor when rated speed operates above,
Its speed adjustable range is restricted, and DC brushless motor cannot achieve constant power output in high-speed cruising.By control direct current without
Brush motor commutates can solve the above problems in advance.
In addition in operation, due to being influenced by inductor saturation effect, phase current will produce larger DC brushless motor
Spike, the peak value of peak current can exceed that twice or more of average phase current, this high-power especially for pure electric automobile
Driving motor, peak current must limit, and the high power device selected by no person can be multiplied cost.By accurately controlling
DC brushless motor output processed can solve the above problems.
The method that currently used control DC brushless motor commutates in advance is to calculate advance angle according to motor speed to correspond to
Commutating period.Using above method prediction advance angle corresponding commutating period, since the fluctuation of load leads to relative speed variation mistake
Big or master will influence the precision to commutate in advance and response time when signal is interfered suddenly, it is excessive that advance angle deviates desired value
Controller will be directly resulted in burn.
The currently used method for inhibiting DC brushless motor peak current is by changing motor stator tooth socket, using
The above method, the applicable speed adjustable range of motor is narrow, can not fully meet service requirement under pure electric automobile full working scope.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of DC brushless motor and electric vehicle, to increase phase
Position acquisition precision, so as to accurately control the commutation angle in advance of DC brushless motor, while effectively inhibiting motor operation
The peak current generated in the process.
In a first aspect, the utility model embodiment provides a kind of DC brushless motor, including motor body and controller；
Main field sensor and auxiliary magnetic field sensor are provided on motor body；The machinery with rotor rotation of motor body is tied
Multiple magnetoresistive bits are additionally provided on structure；The position of magnetoresistive bit is corresponding in same level with the position of auxiliary magnetic field sensor；
Main field sensor and auxiliary magnetic field sensor are connect with controller respectively；Main field sensor is for acquiring motor body operation
Sector；Auxiliary magnetic field sensor is for acquiring operation angle of the motor body in sector；Controller for receive sector and
Operation angle exports corresponding control signal, to control direction of rotation and the output current of motor body.
With reference to first aspect, the utility model embodiment provides the first possible embodiment of first aspect,
In, main field sensor includes main Hall sensor；Auxiliary magnetic field sensor includes auxiliary Hall sensor.
With reference to first aspect, the utility model embodiment provides second of possible embodiment of first aspect,
In, auxiliary magnetic field sensor is set on the rear end cap of motor body.
With reference to first aspect, the utility model embodiment provides the third possible embodiment of first aspect,
In, multiple magnetoresistive bits are set on the blast fan of the motor body.
The third possible embodiment, the utility model embodiment provide the 4th of first aspect with reference to first aspect
The possible embodiment of kind, wherein multiple magnetoresistive bits are uniformly distributed along the circumferential position of blast fan.
The third possible embodiment, the utility model embodiment provide the 5th of first aspect with reference to first aspect
The possible embodiment of kind, wherein further include motor fan housing；The rear end cap of motor fan housing and motor body connects；Fan
Impeller is set between motor fan housing and the rear end cap.
The third possible embodiment, the utility model embodiment provide the 6th of first aspect with reference to first aspect
The possible embodiment of kind, wherein controller includes singlechip chip or dsp chip.
With reference to first aspect, the utility model embodiment provides the 7th kind of possible embodiment of first aspect,
In, stator winding is provided in motor body；Stator winding includes threephase stator winding.
With reference to first aspect, the utility model embodiment provides the 8th kind of possible embodiment of first aspect,
In, further include electronic switch circuit；Multiple device for power switching are provided in electronic switch circuit；Device for power switching is for controlling
Make the motor body commutation.
Second aspect, the utility model embodiment provide a kind of electric vehicle, the above-mentioned brush DC electricity of the electric vehicle
Machine.
The utility model embodiment provides a kind of DC brushless motor and electric vehicle, and main magnetic is provided on motor body
Field sensor and auxiliary magnetic field sensor；Main field sensor is used to acquire the sector of motor body operation；Auxiliary magnetic field senses
Device is for acquiring operation angle of the motor body in sector；Controller is corresponded to for receiving the sector and operation angle, output
Control signal, to control direction of rotation and the output current of motor body.Which can by the way that auxiliary magnetic field sensor is arranged
To increase phase acquisition precision, so as to accurately control the commutation angle in advance of DC brushless motor, while effectively inhibiting
The peak current generated in motor operation course.
Other feature and advantage of the utility model will illustrate in the following description, alternatively, Partial Feature and advantage
Can deduce from specification or unambiguously determine, or by implement the utility model above-mentioned technology it can be learnt that.
To enable the above objects, features, and advantages of the utility model to be clearer and more comprehensible, better embodiment cited below particularly,
And coordinate appended attached drawing, it is described in detail below.
Description of the drawings
It, below will be right in order to illustrate more clearly of specific embodiment of the present invention or technical solution in the prior art
Specific implementation mode or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, it is described below
In attached drawing be that some embodiments of the utility model are not paying creativeness for those of ordinary skill in the art
Under the premise of labour, other drawings may also be obtained based on these drawings.
Fig. 1 is a kind of structural schematic diagram for DC brushless motor that the utility model embodiment provides；
Fig. 2 is the structural schematic diagram for another DC brushless motor that the utility model embodiment provides；
Fig. 3 is a kind of control method flow chart for DC brushless motor that the utility model embodiment provides；
Fig. 4 is the control method flow chart for another DC brushless motor that the utility model embodiment provides；
Fig. 5 is the control sequential figure of motor in the control method for the DC brushless motor that the utility model embodiment provides；
Fig. 6 is the phase current schematic diagram in the DC brushless motor operational process that the utility model embodiment provides；
Fig. 7 is obtained adjustment point waveform in the control method of DC brushless motor that the utility model embodiment provides
Figure.
Icon：100- motor bodies；110- controllers；101- main field sensors；102- auxiliary magnetic field sensors；103-
Magnetoresistive bit；200- motor fan housings；201- electric motor fans；210- magnetoresistive bits；211- assists Hall sensor.
Specific implementation mode
To keep the purpose, technical scheme and advantage of the utility model embodiment clearer, below in conjunction with attached drawing to this
The technical solution of utility model is clearly and completely described, it is clear that described embodiment is that the utility model part is real
Example is applied, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making
The every other embodiment obtained under the premise of creative work, shall fall within the protection scope of the present invention.
Currently, the control method that common DC brushless motor commutates in advance is easy to be believed by the fluctuation of load or main Hall
Number distortion influence, cause the angle control precision to commutate in advance decline.And the suppressing method of DC brushless motor peak current
Also service requirement under pure electric automobile full working scope can not be fully met.Based on this, one kind that the utility model embodiment provides is straight
Brushless motor and its control method are flowed, can be applied to during the control of DC brushless motor, it is particularly possible to be applied to pure electricity
In the DC brushless motor of electrical automobile.
A kind of structural schematic diagram of DC brushless motor shown in Figure 1, the DC brushless motor include motor body
100 and controller 110；Main field sensor 101 and auxiliary magnetic field sensor 102 are provided on motor body；Motor body
It is additionally provided with multiple magnetoresistive bits 103 in mechanical structure with rotor rotation；The position of magnetoresistive bit 103 is sensed with auxiliary magnetic field
The position of device 102 is corresponding in same level；Main field sensor 101 and auxiliary magnetic field sensor 102 respectively with controller
110 connections；Main field sensor 101 is used to acquire the sector of motor body operation；Auxiliary magnetic field sensor 102 is for acquiring electricity
Operation angle of the machine ontology in sector；Controller 110 is used to receive sector and operation angle, exports corresponding control signal,
To control direction of rotation and the output current of motor body 100.
Specifically, above-mentioned main field sensor includes main Hall sensor；Auxiliary magnetic field sensor includes that auxiliary Hall passes
Sensor；Above controller includes singlechip chip or DSP (Digital Signal Processing, Digital Signal Processing) core
Piece；Stator winding is provided in motor body, which includes threephase stator winding.
Further, which further includes motor fan housing；The rear end of the motor fan housing and motor body
Lid connection；Blast fan is set between motor fan housing and rear end cap；The DC brushless motor further includes electronic switch circuit；
Multiple device for power switching are provided in the electronic switch circuit；The device for power switching is for controlling motor body commutation.
The utility model embodiment provides a kind of DC brushless motor, including motor body and controller；Motor body
On be provided with main field sensor and auxiliary magnetic field sensor；Main field sensor is used to acquire the sector of motor body operation；
Magnetoresistive bit in the mechanical structure with rotor rotation of auxiliary magnetic field sensor and motor body cooperates, and acquires motor
Operation angle of the ontology in sector；Main field sensor and auxiliary magnetic field sensor are connect with controller respectively；Controller connects
Sector and operation angle are received, corresponding control signal is exported, to control direction of rotation and the output current of motor body.Which
Phase acquisition precision can be increased by the way that auxiliary magnetic field sensor is arranged, so as to accurately control carrying for DC brushless motor
Preceding commutation angle, while effectively inhibiting the peak current generated in motor operation course.
The structural schematic diagram of another DC brushless motor shown in Figure 2, the DC brushless motor include motor sheet
Body, auxiliary hall sensing device and controller；The motor body is three-phase direct-current brushless motor, contains two pairs of motor poles；Motor
Main Hall sensor is provided on ontology；Motor body includes motor fan housing 200, electric motor fan 201 and back end cover for motor；Electricity
Machine fan guard is connect with back end cover for motor；Electric motor fan impeller is set between motor fan housing and rear end cap；Hall is assisted to pass
Induction device includes magnetoresistive bit 210 and auxiliary Hall sensor 211；Auxiliary Hall sensor is fixed on motor rear end and covers, 60
Magnetoresistive bit is uniformly embedded in blast fan, and auxiliary Hall sensor faces magnetoresistive bit, in normal course of operation magnetoresistive bit with
Fan rotates；Main Hall sensor and auxiliary Hall sensor are connect with controller respectively；Main Hall sensor is used for acquiring electricity
The phase sequence of machine ontology；Auxiliary Hall sensor is used to acquire the operation angle of motor body；Controller is for receiving phase sequence and fortune
Row angle exports corresponding control signal, to control direction of rotation and the output current of motor body.
Specifically, in motor operation course, by assisting hall sensing device to be converted into motor operation angle signal
Pulse signal.After auxiliary Hall sensor conversion, angle signal is converted into intuitive mechanical hard signal, utilizes this machine
Tool hard signal controls the angle logic of DC brushless motor.
The DC brushless motor that the utility model embodiment provides assists Hall sensor, by motor operation by increase
The specific angular transition of each sector increases the precision of phase acquisition at auxiliary Hall pulse signal in the process；Compared to biography
For system method by calculating each sector run time of motor, the method for calculating phase angle using run time is simpler efficient.
On the other hand, motor angle is acquired using auxiliary Hall sensor, is actually converted into the mechanical angle of motor
Pulse signal, in motor operation course mechanical angle with electrical angle always at a fixed proportionate relationship, so motor is being transported
No matter how how rotating speed and load change during row, and collected pulse signal can correspond to the electrical angle of motor always.So should
Mode can meet pure electric automobile different rotating speeds and load, the various application demands of load and relative speed variation greatly.
A kind of control method flow chart of DC brushless motor shown in Figure 3, this method be applied to above-mentioned direct current without
The controller of brush motor, this method comprises the following steps：
It is defeated to calculate auxiliary magnetic field sensor according to the motor number of pole-pairs of the quantity of magnetoresistive bit and motor body by step S300
The corresponding motor angle of single pulse gone out；
Step S302 calculates practical commutation angle according to the ideal commutation angle of motor body and preset commutation angle in advance；
Step S304 calculates practical commutation angle pair according to practical commutation angle and the corresponding motor angle of single pulse
The umber of pulse for the auxiliary magnetic field sensor answered；
Step S306, the time interval of acquisition reversal point and first pulse in the current commutation cycle；
Step S308 is calculated after above-mentioned umber of pulse, the commutating period also needed to wait for according to the practical angle that commutates；
Specifically, above-mentioned steps S308 can specifically be accomplished in the following manner：By following formula, when calculating commutation
Between TH：
TH=agl_value*T_pulse/agl_pulse-T1-n_pulse*T_pulse
Wherein, agl_value is practical commutation angle；The single pulse pair that magnetic assist field sensor exports supplemented by T_pulse
The time answered；The corresponding motor angle of single pulse that magnetic assist field sensor exports supplemented by agl_pulse；T1 be reversal point with work as
The time interval of first pulse in the preceding commutation cycle；N_pulse is the corresponding auxiliary magnetic field sensor of practical commutation angle
Umber of pulse.
Step S310, verifies time interval and commutating period；
Specifically, step S310 can specifically be accomplished in the following manner：
Judge time interval and commutating period whether and meanwhile meet following formula：
TH<T_pulse,
T1<T_pulse,
(T1+TH)<T_pulse,
If so, determining that verification passes through.
Step S312 after reaching commutating period, generates interrupt function, control motor body commutation if verification passes through；
Wherein, it generates to interrupt and as calls interrupt function.
Further, this method further includes：By following formula, calculate after reaching commutating period, the reality of motor body
Commutate angle：
Agl_value=(T1+TH+n_pulse*T_pulse) * 360*n_pole/T_m；
Wherein, n_pole is motor number of pole-pairs；T_m is the mechanical cycle length of motor body.
Further, this method further includes：Acquire peak location of the phase current of motor body output within each period；
The operation angle of motor body is acquired by auxiliary magnetic field sensor；When operation angle reaches peak location, controller is reduced
The duty ratio of output voltage, to reduce the peak current size of peak location.
Specifically, it is above-mentioned when operation angle reach peak location when, reduce controller output voltage duty ratio the step of,
It can specifically be accomplished in the following manner：At the hopping edge position of the pulse signal of auxiliary magnetic field sensor output, detection fortune
Whether row angle reaches peak location；If reached, interrupt function is generated, to reduce the duty ratio of controller output voltage.
The control method for the DC brushless motor that the utility model embodiment provides, increases the precision of phase acquisition, into
One step improves the angle precision to commutate in advance.This method can be adjusted adaptively, meet client to the more rotating speeds of motor, more power
Application, so that motor is always worked in high efficient district, and ensure the high rotating speed power output of motor, improve the use of motor in this way
Range, while motor delivery efficiency is improved, reduce motor use cost.
Further, this method utilizes auxiliary Hall pulse-break tune according to phase current changing rule in each phase sequence
Whole controller output voltage, can effectively inhibit the peak current generated in DC brushless motor operational process.By inhibiting point
Peak current can reduce device heating amount, reduce device loss, reduce device cost, while promoting product reliability.
Participate in the control method flow chart of another DC brushless motor shown in Fig. 4.This method is applied to above-mentioned direct current
The controller of brushless motor, this method comprises the following steps：
Step S400 calculates the corresponding motor angle of each pulsation according to magnetoresistive bit quantity and motor number of pole-pairs；
Specifically, total magnetic resistance the piece number corresponds to the umber of pulse of a complete mechanical period, and motor electrical angle is equal to mechanical angle
Multiply number of pole-pairs.The expression formula of the single corresponding electrical angle of pulsation is as follows：
Agl_pulse=360*n_pole/n_numbe,
Wherein, agl_pulse is that single auxiliary hall signal pulse corresponds to electrical angle, and n_pole is motor number of pole-pairs, n_
Numbe is magnetoresistive bit quantity.
Step S402 calculates the corresponding auxiliary Hall sensor umber of pulse of practical commutation angle；
Specifically, step S402 includes the following steps：
(1) advance angle according to demand calculates practical commutation angle：
Agl_value=agl_set-agl_ahead
Wherein, agl_value is practical commutation angle；Agl_set is ideally motor commutation angle, general three-phase
DC brushless motor is 60 °；Agl_ahead is the commutation angle in advance of demand.
(2) electrical angle is corresponded to according to single Hall pulse, calculates practical commutation angle respective pulses number：
N_pulse=agl_value/agl_pulse,
Wherein, n_pulse is actual angle respective pulses quantity, and is positive integer.
Step S404 calculates the last one auxiliary arteries and veins according to reversal point to the time interval of first auxiliary pulse signal
Rush signal to next reversal point time；
Specifically, it is realized by following steps：
(1) it calculates single pulse and corresponds to the time：
T_pulse=T_m/n_numbe,
Wherein T_pulse is that single pulse corresponds to the time；N_numbe is magnetoresistive bit quantity；When T_m is a Machine cycle
Between.
(2) calculate the last one auxiliary pulse signal to next reversal point time：
T4=agl_value*T_pulse/agl_pulse-T1-n_pulse*T_pulse
Wherein, T4 is time of the last one auxiliary pulse signal to next reversal point；T1 is reversal point to first
The time interval of auxiliary pulse signal.
Step S406, commutating period verification；
Specifically, judge that the last one auxiliary pulse signal is auxiliary to first to the time of next reversal point and reversal point
Help pulse signal time interval whether and meanwhile meet following formula：
T4<T_pulse,
T1<T_pulse,
(T1+T4)<T_pulse,
If it is, verification passes through.It otherwise, need to be by adjusting since magnetoresistive bit quantity determines that a pulse corresponds to the time
The quantity of magnetoresistive bit ensures that motor advance angle reaches required precision.
Step S408, control DC brushless motor commutation；
Step S410 adjusts controller output signal according to auxiliary hall signal pulse.
Specifically, interruption is arranged in the hopping edge for pulse signal being collected using auxiliary Hall sensor, is adjusted as signal
Point.In the duty ratio of the adjustable controller output voltage of signal adjustment point, adjustment output voltage is to inhibit peak current.
It realizes that the above method needs to acquire the time of T1, calculates the time of T4, T_m；N_pulse, n_pole quantity.n_
Pulse, n_pole can be calculated simply according to motor characteristic, and T_m is by assisting Hall sensor or main Hall sensor can
Accurate acquisition.Fig. 5 is shown in the control method of DC brushless motor, and the control sequential figure of motor, HALL_REF is to assist suddenly
That sensor signal, HALL_A, HALL_B, HALL_C are main Hall sensor signal, OUT_UH, OUT_UL, OUT_VH, OUT_
VL, OUT_WH, OUT_WL are electric machine controller output signals.T1 is reversal point between the time of first auxiliary pulse signal
Every；T2 is practical commutating period；T3a is that ideally motor commutation time, T5 are the commutating period in advance of demand.
In actual implementation, it is assumed that DC brushless motor is three-phase direct-current brushless motor, has two pairs of motor poles, is provided with
1 auxiliary Hall sensor, 60 magnetoresistive bits.It is each that Hall sensor pulse is assisted to correspond to 12 ° of electric angles by taking this motor as an example
Degree, if current request advance angle is 15 °, the practical angle that commutates is 45 °.The angle that commutates corresponds to 4 auxiliary Hall sensor arteries and veins
Punching adds T1 the and T4 times, tests the T1 times, calculates the T4 times, and timer interruption controls motor commutation after reaching the T4 times.
The phase current schematic diagram being illustrated in figure 6 in DC brushless motor operational process, has everywhere in each commutation cycle
Peak current；Within each commutation cycle, PWM adjustment is controlled by auxiliary magnetic field sensor level；Be illustrated in figure 7 direct current without
In the control method of brush motor, obtained adjustment point oscillogram, Trg is that PWM controls trigger signal.Reversing point position does not adjust
PWM duty cycle shares 7 output adjustment points (as shown in Figure 5), passes through reality according to low and high level trigger signal during output
When adjustment controller output, achieve the purpose that inhibit inhibit peak current.
A kind of control method for DC brushless motor that the utility model embodiment provides, need to be by auxiliary Hall sensor
It realizes.When auxiliary Hall sensor is not arranged in motor, if measuring the main Hall position of three phase electric machine by main Hall sensor
It is set to 001, can only judge motor current rotor position for 1 sector of state, but specific location is unclear；Increase auxiliary Hall to pass
After sensor, if having run the position of 2 auxiliary Hall pulses after measuring motor operation to 1 sector again, corresponded to according to single pulsation
Electrical angle can calculate the specific angle position of motor.To which the operation angle by DC brushless motor in each sector is further thin
Point, can precise acquisition motor operation position, to improve the commutation precision of motor.
During peak current inhibits, it is the equal of a references angle letter to assist the pulse signal of Hall sensor
Number, motor output signal is controlled as external interrupt using this references angle signal, ensures the precision of output time, more
Effectively inhibit peak current.
In addition, in the description of the utility model embodiment unless specifically defined or limited otherwise, term " installation ",
" connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally connect
It connects；It can be mechanical connection, can also be electrical connection；It can be directly connected, can also indirectly connected through an intermediary, it can
To be the connection inside two elements.For the ordinary skill in the art, it can understand above-mentioned term with concrete condition
Concrete meaning in the present invention.
It, can be with if the function is realized in the form of SFU software functional unit and when sold or used as an independent product
It is stored in a computer read/write memory medium.Based on this understanding, the technical solution of the utility model substantially or
Person says that the part of the part that contributes to existing technology or the technical solution can be expressed in the form of software products,
The computer software product is stored in a storage medium, including some instructions are used so that computer equipment (can be with
Personal computer, server or the network equipment etc.) execute each embodiment the method for the utility model whole or portion
Step by step.And storage medium above-mentioned includes：USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), with
Machine accesses various Jie that can store program code such as memory (RAM, Random Access Memory), magnetic disc or CD
Matter.
It is in the description of the present invention, it should be noted that term "center", "upper", "lower", "left", "right", " perpendicular
Directly ", the orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, and is only
The utility model and simplifying describes for ease of description, do not indicate or imply the indicated device or element must have it is specific
Orientation, with specific azimuth configuration and operation, therefore should not be understood as limiting the present invention.In addition, term " the
One ", " second ", " third " are used for description purposes only, and are not understood to indicate or imply relative importance.
Finally it should be noted that：Embodiment described above, only specific embodiment of the present utility model, to illustrate this
The technical solution of utility model, rather than its limitations, the scope of protection of the utility model is not limited thereto, although with reference to aforementioned
The utility model is described in detail in embodiment, it will be understood by those of ordinary skill in the art that：It is any to be familiar with this skill
The technical staff in art field within the technical scope disclosed by the utility model, still can be to the skill recorded in previous embodiment
Art scheme modify or can readily occur in variation or equivalent replacement of some of the technical features；And these modifications,
Variation is replaced, the spirit and model of the utility model embodiment technical solution that it does not separate the essence of the corresponding technical solution
It encloses, should be covered within the scope of the utility model.Therefore, the scope of protection of the utility model is answered described is wanted with right
Subject to the protection domain asked.
Claims (10)
1. a kind of DC brushless motor, which is characterized in that including motor body and controller；
Main field sensor and auxiliary magnetic field sensor are provided on the motor body；The motor body with rotor
Multiple magnetoresistive bits are additionally provided in the mechanical structure of rotation；The position of the position of the magnetoresistive bit and the auxiliary magnetic field sensor
It is corresponding in same level；The main field sensor and the auxiliary magnetic field sensor are connect with the controller respectively；
The main field sensor is used to acquire the sector of the motor body operation；The auxiliary magnetic field sensor is for acquiring
Operation angle of the motor body in the sector；The controller is used to receive the sector and the operation angle,
Corresponding control signal is exported, to control direction of rotation and the output current of the motor body.
2. DC brushless motor according to claim 1, which is characterized in that the main field sensor includes that main Hall passes
Sensor；The auxiliary magnetic field sensor includes auxiliary Hall sensor.
3. DC brushless motor according to claim 1, which is characterized in that the auxiliary magnetic field sensor is set to described
On the rear end cap of motor body.
4. DC brushless motor according to claim 1, which is characterized in that multiple magnetoresistive bits are set to the motor
On the blast fan of ontology.
5. DC brushless motor according to claim 4, which is characterized in that multiple magnetoresistive bits are along the fan leaf
The circumferential position of wheel is uniformly distributed.
6. DC brushless motor according to claim 4, which is characterized in that further include motor fan housing；
The motor fan housing is connect with the rear end cap of the motor body；The blast fan is set to the motor fan housing
Between the rear end cap.
7. DC brushless motor according to claim 4, which is characterized in that the controller include singlechip chip or
Dsp chip.
8. DC brushless motor according to claim 1, which is characterized in that be provided in the motor body stator around
Group；
The stator winding includes threephase stator winding.
9. DC brushless motor according to claim 1, which is characterized in that further include electronic switch circuit；
Multiple device for power switching are provided in the electronic switch circuit；The device for power switching is for controlling the motor
Ontology commutation.
10. a kind of electric vehicle, which is characterized in that the electric vehicle include claim 1-9 any one of them direct current without
Brush motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820339854.6U CN207884471U (en) | 2018-03-12 | 2018-03-12 | DC brushless motor and electric vehicle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820339854.6U CN207884471U (en) | 2018-03-12 | 2018-03-12 | DC brushless motor and electric vehicle |
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| CN207884471U true CN207884471U (en) | 2018-09-18 |
Family
ID=63496868
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108429425A (en) * | 2018-03-12 | 2018-08-21 | 武汉菱电汽车电控系统股份有限公司 | DC brushless motor and its control method |
| CN113014156A (en) * | 2019-12-18 | 2021-06-22 | 珠海格力电器股份有限公司 | Motor control method and device, motor and readable storage medium |
-
2018
- 2018-03-12 CN CN201820339854.6U patent/CN207884471U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108429425A (en) * | 2018-03-12 | 2018-08-21 | 武汉菱电汽车电控系统股份有限公司 | DC brushless motor and its control method |
| CN108429425B (en) * | 2018-03-12 | 2024-03-19 | 武汉菱电汽车电控系统股份有限公司 | DC brushless motor and control method thereof |
| CN113014156A (en) * | 2019-12-18 | 2021-06-22 | 珠海格力电器股份有限公司 | Motor control method and device, motor and readable storage medium |
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