CN207720051U - A kind of brshless DC motor - Google Patents
A kind of brshless DC motor Download PDFInfo
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- CN207720051U CN207720051U CN201721674100.8U CN201721674100U CN207720051U CN 207720051 U CN207720051 U CN 207720051U CN 201721674100 U CN201721674100 U CN 201721674100U CN 207720051 U CN207720051 U CN 207720051U
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Abstract
The utility model embodiment is related to electronic technology field, discloses a kind of brshless DC motor.In the utility model, brshless DC motor, including：Motor body, drive control unit and the inversion unit for including the combination of N number of power switch tube, N are the integer more than 2；Motor body is electrically connected with inversion unit；Drive control unit combines connection with N number of power switch tube respectively, when the inversion unit starts, combines the conducting information be connected for the first time for recording N number of power switch tube, and the conducting for the first time of N number of power switch tube combination is controlled according to conducting information.The brshless DC motor of the utility model extends the service life of each power switch tube, enhances the service life of the brshless DC motor.
Description
Technical field
The utility model embodiment is related to electronic technology field, more particularly to a kind of brshless DC motor.
Background technology
Currently, brshless DC motor (Brushless Direct Current Motor, referred to as " BLCD "), has overcome
The birth defects of brushless motor, with electronic commutator instead of mechanical commutator, so brshless DC motor had both had directly
The features such as galvanic electricity machine good speed adjusting performance, and the simple, non-commutation spark, reliable for operation and be easy to tie up with ac motor structure
The advantages that shield.The essence of brshless DC motor is DC supply input, and direct current is converted to alternating current using electronic inverter,
There is the three-phase AC permanent magnet synchronous motor that rotor-position is fed back.Brshless DC motor obtains in fields such as household electrical appliances, robot, electric vehicles
It obtained and was widely applied.
Inventor has found that at least there are the following problems in the prior art：Brshless DC motor starts from totally stationary state
When, the rush of current that the power switch tube first turned in driver is subject to is big, and current Brushless DC drive motor
The power switch tube of fixed position, after prolonged use, the fixed position is often connected in start-up course in driver for the first time
Power switch tube performance decline speed will be faster than other power switch tubes, cause fixed position power switch tube and its
The performance of his power switch tube is different, influences the performance of brshless DC motor, simultaneously as fixed position is connected for a long time
Power switch tube causes the probability of damage of the power switch tube of fixed position to be much higher than other power switch tubes, shortens
The service life of brshless DC motor.
Utility model content
The utility model embodiment is designed to provide a kind of brshless DC motor, extends making for each power switch tube
With the service life, enhance the service life of brshless DC motor.
In order to solve the above technical problems, the embodiment of the utility model provides a kind of brshless DC motor, including：Electricity
Machine ontology, drive control unit and the inversion unit for including the combination of N number of power switch tube, N are the integer more than 2；Motor body
It is electrically connected with inversion unit；Drive control unit combines connection with N number of power switch tube respectively, when the inversion unit starts,
The conducting information be connected for the first time is combined for recording N number of power switch tube, and N number of power switch tube group is controlled according to conducting information
The conducting for the first time closed.
The utility model embodiment in terms of existing technologies, since drive control unit is opened with N number of power respectively
Pipe combination connection is closed, the N number of power switch tube combination of fast recording can for the first time be led when inversion unit starts by connection relation
Logical conducting information, when inversion unit starts, drive control unit can determine according to the conducting information of record and wait leading for the first time
Logical power switch tube combination avoids inversion unit and is starting to control the conducting for the first time of N number of power switch tube combination
When, the power switch tube combination of fixed position is connected for the first time, to balance being connected for the first time for each power switch tube combination
Number is connected so that the performance gap of the power switch tube in N number of power switch tube combination reduces, and improves the whole of inversion unit
Body performance enhances the service life of brshless DC motor.
In addition, conducting information includes：The location information and each power that each power switch tube combination is connected for the first time are opened
Close the conducting mark that pipe combination is connected for the first time.Conducting information includes the location information be connected for the first time and for the first time of power switch tube
The conducting of conducting identifies, and can quickly determine power switch tube combination to be connected for the first time when inversion unit starts.
In addition, conducting mark is used to indicate whether the power switch tube combination when inversion unit starts is connected for the first time, drive
Control unit is specifically used for：In the case where inversion unit receives enabled instruction, according to default the leading of N number of power switch tube combination
Clear and coherent sequence, the conducting for detecting the combination of each power switch tube identifies whether that instruction is connected for the first time, if so, detecting next group of work(
Rate switching tube combines, and otherwise, the power switch tube combination of current detection is connected for the first time.Driving unit according to default turn-on sequence,
It detects whether the combination of each power switch tube indicates to be connected for the first time, avoids the occurrence of the feelings for combining missing inspection to N number of power switch tube
Condition, meanwhile, it can quickly determine power switch tube combination to be connected for the first time, enhance the startup speed of inversion unit.
In addition, the conducting number that conducting mark is connected for the first time for marking power switch tube to combine, drive control unit tool
Body is used for：In the case where inversion unit receives enabled instruction, according to the default turn-on sequence that N number of power switch tube combines, inspection
The conducting for surveying the combination of each power switch tube identifies marked conducting number；The conducting combined according to N number of power switch tube
Number and default turn-on sequence determine power switch tube combination to be connected for the first time, and determining work(to be connected for the first time are connected
Rate switching tube combines.Driving unit according to default turn-on sequence, detect each power switch tube combination be connected for the first time lead
Logical number avoids the occurrence of the case where combining missing inspection to N number of power switch tube, meanwhile, it, can be fast and accurately by the way that number is connected
Determine power switch tube combination to be connected for the first time.
In addition, drive control unit is additionally operable to：Store the default turn-on sequence of N number of power switch tube combination.Allow to
Turn-on sequence is preset in flexible setting.
In addition, inversion unit is the Three-phase full-bridge inversion unit for including 3 bridge arms, each bridge arm is by multiple power switch
Pipe parallel connection is constituted, and the intermediate node of 3 bridge arms is electrically connected with three interfaces of motor body respectively, wherein each power switch
The power switch tube that pipe combination includes is belonging respectively to different bridge arms.
In addition, brshless DC motor further includes：Position sensor；Position sensor be arranged on motor body, respectively with
Motor body is connected with drive control unit, and the location information be connected for the first time is combined for detecting N number of power switch tube.Pass through position
The conducting situation for the first time of N number of power switch tube combination can fast and accurately be determined by setting sensor.
In addition, power switch tube is mos field effect transistor.Power switch tube is metal oxide
Semiconductor field effect transistor is convenient for the control of drive control unit.
It in addition, N is 6, and include 2 power switch tubes in the combination of each power switch tube, wherein drive control unit
It is electrically connected with each power switch tube.
Description of the drawings
One or more embodiments are illustrated by the picture in corresponding attached drawing, these exemplary theorys
The bright restriction not constituted to embodiment, the element with same reference numbers label is expressed as similar element in attached drawing, removes
Non- to have special statement, composition does not limit the figure in attached drawing.
Fig. 1 is the inside connection signal according to a kind of brshless DC motor provided in the utility model first embodiment
Figure；
Fig. 2 is connected according to a kind of specific circuit of the brshless DC motor provided in the utility model first embodiment
Connect schematic diagram；
Fig. 3 is the drive control unit according to a kind of brshless DC motor provided in the utility model first embodiment
Structural schematic diagram；
Fig. 4 is the drive control unit according to a kind of brshless DC motor provided in the utility model second embodiment
Structural schematic diagram.
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
Each embodiment of utility model is explained in detail.However, it will be understood by those skilled in the art that in this practicality
In novel each embodiment, in order to make the reader understand this application better, many technical details are proposed.But even if do not have
These technical details and various changes and modifications based on the following respective embodiments can also realize that the application is claimed
Technical solution.
The first embodiment of the utility model is related to a kind of brshless DC motor.The brshless DC motor, including：Motor
Ontology 101, drive control unit 102 and the inversion unit 103 for including the combination of N number of power switch tube, N are the integer more than 2.Figure
1 is the connection diagram inside the brshless DC motor.
Motor body 101 is electrically connected with inversion unit 103；Drive control unit 102 is combined with N number of power switch tube respectively
Connection combines the conducting information be connected for the first time, and in inversion when inversion unit 103 starts for recording N number of power switch tube
When unit 103 starts, the conducting for the first time of N number of power switch tube combination is controlled according to conducting information.
Specifically, it in the combination of each power switch tube can include multiple power switch tubes, and the mode root combined
It needs to be determined that, for example, can include 2 power switch tubes in the combination of each power switch tube, it can also be wrapped according to actual circuit
Containing 4 power switch tubes.Wherein, there are the power switch tubes of repeatable position in 6 power switch tube combinations, for example, it is assumed that having 6
A power switch tube, respectively Q1, Q2, Q3, Q4, Q5, Q6 have 6 power switch tube combinations, and each power switch tube combination
In include 2 power switch tubes, then constitute 6 power switch tubes combination can be：Q1 and Q6, Q2 and Q6, Q2 and Q4, Q3 and
Q4, Q3 and Q5, Q1 and Q5.Certainly, the value of N can be 3,4,5 etc..In present embodiment, N 6, and each power switch
Include 2 power switch tubes in pipe combination, wherein drive control unit 102 is electrically connected with each power switch tube.For example,
Assuming that there is the combination of 6 power switch tubes, Q1 and Q6, Q2 and Q6, Q2 and Q4, Q3 and Q4, Q3 and Q5, Q1 and Q5, then 6 power open
The power switch tube that 6 different locations are contained in pipe combination is closed, respectively：Q1, Q2, Q3, Q4, Q5, Q6, then drive control list
Member 102 is electrically connected with Q1, Q2, Q3, Q4, Q5, Q6 respectively.
In one specific embodiment, inversion unit 103 is the Three-phase full-bridge inversion unit for including 3 bridge arms, often
A bridge arm is made of multiple power switch tube parallel connections, and the intermediate node of 3 bridge arms is electric with three interfaces of motor body 101 respectively
Connection, wherein the power switch tube that each power switch tube combination includes is belonging respectively to different bridge arms.Specific circuit connection
Figure is as shown in Figure 2.
Specifically, each bridge arm can be 2 power switch tube parallel connections, alternatively, each bridge arm can be that 4 power are opened
Parallel connection two-by-two is closed, is illustrated so that each bridge arm is 2 power switch tube parallel connections as an example in present embodiment, as shown in Figure 2,
Power switch tube Q1 and power switch tube Q2 is as a bridge arm, power switch tube Q3 and power switch tube Q4 as a bridge
Arm, power switch tube Q5 and power switch tube Q6 are as a bridge arm.Two capacitances of parallel connection are gone back in Fig. 2, to realize exchange-
The conversion of DC-AC.6 pins of drive control unit 102 are connect with the grid of 6 power switch tubes respectively, i.e., such as Fig. 2
Shown in, the pin S1 of drive control unit 102 is connect with the grid of power switch tube Q1, pin S2 and power switch tube Q2's
Grid connects, and pin S3 is connect with the grid of power switch tube Q3, and pin S4 is connect with the grid of power switch tube Q4, pin S5
It is connect with the grid of power switch tube Q5, pin S6 is connect with the grid of power switch tube Q6.
Drive control unit 102 is discussed in detail below in conjunction with the specific circuit diagram in Fig. 2 and records N number of power switch tube
The conducting information of combination, and when the inversion unit 103 starts, leading for N number of power switch tube combination is controlled according to conducting information
Logical detailed process.
In one specific embodiment, conducting information includes：The position letter that each power switch tube combination is connected for the first time
The conducting mark that breath and each power switch tube combination are connected for the first time.
Specifically, when inversion unit 103 starts, the power switch tube be connected at first in N number of power switch combination combines
It is defined as the conducting for the first time of power switch combination.For example, there is 3 power switch tube combinations, respectively power switch tube combines
1, power switch tube combination 2 and power switch tube combination 3, it is assumed that when inversion unit 103 starts, in 3 power switch tube combinations
The power switch tube of power switch tube combination 1 is connected at first, and the work(in power switch tube combination 2 and power switch tube combination 3
Rate switching tube does not turn on also at this time, it can be said that when inversion unit 103 starts, power switch tube combination 1 is connected for the first time.6 work(
Rate switching tube is connect according to mode shown in Fig. 2 with drive control unit 102, drive control unit 102 according to pin S1~
The level value of S6, it may be determined that the location information for going out the power switch tube combination be connected for the first time, for example, it is assumed that drive control unit
102 when starting, in drive control unit 102 level value of pin S1 and pin S6 be first high level, then can determine with
The power switch tube Q1 of the S1 pins connection and power switch tube Q6 being connect with S6 pins is to be connected for the first time, i.e. power switch tube group
Q1 and Q6 is closed to be connected for the first time.
In one specific embodiment, conducting mark is used to indicate the power switch tube when the inversion unit 103 starts
Whether combination is connected for the first time, and drive control unit 102 is specifically used for：In the case where inversion unit 103 receives enabled instruction, press
According to the default turn-on sequence of N number of power switch tube combination, the conducting for detecting the combination of each power switch tube identifies whether to indicate
It is connected for the first time, if so, otherwise detect next group of power switch tube combination is connected the power switch tube group of current detection for the first time
It closes.
Specifically, inversion unit 102 combines positive/negative rotaring signal to generate effective six state encodings signal：101、100、
110,010,011,001, connection type as shown in Figure 2 is handled by logic establishment, i.e. power switch tube Q1 and Q6 conducting,
Q2 and Q6 conductings, Q2 and Q4 conductings, Q3 and Q4 conductings, Q3 and Q5 conductings, Q1 and Q5 conductings, 6 are connected according to the turn-on sequence
Power switch tube combines, you can driving motor main body 101.In present embodiment, the default conducting of 6 power switch tubes combination is suitable
Above driving sequence may be used in sequence, i.e., default turn-on sequence is：Power switch tube Q1 and Q6 conducting, Q2 and Q6 conductings, Q2
With Q4 conductings, Q3 and Q4 conductings, Q3 and Q5 conductings, Q1 and Q5 conductings.
When drive control unit 102 receives the enabled instruction for starting inversion unit 103, drive control unit 102 is pressed
According to default turn-on sequence, the conducting mark of each power switch tube combination is detected successively, if conducting mark instruction is connected for the first time,
Show that the power switch tube combination of current detection was connected for the first time when inversion unit starts, then detects next group of power switch tube
Combination；If conducting mark instruction does not turn on for the first time, show that the power switch tube of current detection is combined when inversion unit 102 starts
It did not turned on for the first time, drive control unit 102 determines that the power switch tube of current detection is combined as the startup of this inversion unit 103
When the power switch tube combination that first turns on, then the power switch tube combination of conducting current detection for the first time, and by the power switch
The conducting mark of pipe is changed to be connected.For example, it is assumed that 6 power switch tubes are combined as：Q1 and Q6, Q2 and Q6, Q2 and Q4, Q3 and
Q4, Q3 and Q5, Q1 and Q5, it is assumed that conducting is identified as D, and is connected for the first time with " 1 " instruction when inversion unit starts, " 0 " instruction
It is not turned on for the first time when inversion unit starts；When inversion unit receives enabled instruction, the conducting of Q1 and Q2 combinations is detected first
Mark detects next group of power switch tube if being " 1 " if the conducting mark D1 that Q1 and Q2 is combined and combines Q2 and Q6, if Q2 and Q6 groups
The conducting mark D2 of conjunction is " 0 ", then drive control unit determines that the power switch tube that first turns on is combined as Q2 and Q6, and by D2
It is changed to " 1 ".
If it is noted that N number of power switch tube combination conducting mark indicate to be connected for the first time, drive control list
The conducting mark Change All that N number of power switch tube combines is not turn on by member 102, is examined again according to default turn-on sequence
It surveys.
In addition, drive control unit 102 is additionally operable to store the default turn-on sequence of N number of power switch tube combination.Wherein, it drives
Dynamic control unit 102 includes storage unit 1021, and it is suitable to store the default conducting that N number of power switch tube combines by storage unit 1021
Sequence, certainly, storage unit 1021 can also store the conducting information of N number of power switch tube combination.Certainly, drive control unit packet
Processor 1022 is included, drive control unit 102 can be microcontroller, and the structure of the drive control unit is as shown in Figure 3.
The utility model embodiment in terms of existing technologies, since drive control unit is opened with N number of power respectively
Pipe combination connection is closed, the N number of power switch tube combination of fast recording can for the first time be led when inversion unit starts by connection relation
Logical conducting information, when inversion unit starts, drive control unit can determine according to the conducting information of record and wait leading for the first time
Logical power switch tube combination avoids inversion unit and is starting to control the conducting for the first time of N number of power switch tube combination
When, the power switch tube combination of fixed position is connected for the first time, to balance being connected for the first time for each power switch tube combination
Number is connected so that the performance gap of the power switch tube in N number of power switch tube combination reduces, and improves the whole of inversion unit
Body performance enhances the service life of brshless DC motor.
The second embodiment of the utility model is related to a kind of brshless DC motor.In the utility model second embodiment
In, the conducting number that conducting mark is connected for the first time for marking power switch tube to combine, drive control unit 102 is specifically used for：
In the case where inversion unit receives enabled instruction, according to the default turn-on sequence that N number of power switch tube combines, each is detected
The conducting of power switch tube combination identifies marked conducting number；According to the conducting number of N number of power switch tube combination and in advance
If turn-on sequence, power switch tube combination to be connected for the first time is determined, and determining power switch tube to be connected for the first time is connected
Combination.
Specifically, drive control unit 102 can also include counter 1023, pass through when inversion unit 103 starts
Counter 1023 records the conducting number of the power switch tube combination first turned on, structure such as Fig. 3 of drive control unit 1022
It is shown.Certainly, it counts N number of power switch tube and combines the conducting number be connected for the first time, can also be recorded using other modes, it is unlimited
The mode mentioned in present embodiment.When drive control unit 102 receives the enabled instruction for starting inversion unit 103,
According to default turn-on sequence, the conducting for detecting the combination of each power switch tube successively is marked drive control unit 102
Conducting number, drive control unit chooses the power switch tube corresponding to conducting number minimum value according to default turn-on sequence
It combines and is combined as power switch tube to be connected for the first time；Certainly, if in the combination of N number of power switch tube, there are 2 or more groups
When the conducting identical situation of number of conjunction, power switch tube to be connected for the first time is determined according to the sequencing of default turn-on sequence
Combination.Wherein, preset turn-on sequence with it is roughly the same in first embodiment, details are not described herein again.It will illustrate below detailed
Introduce the process：
For example, such as circuit connecting mode in Fig. 2, it is assumed that have 6 power switch tube combinations, then 6 power switch tube combinations
Default turn-on sequence be power switch tube Q1 and Q6 combination, Q2 and Q6 combinations, Q2 and Q4 combinations, Q3 and Q4 combinations, Q3 and Q5
Combination, Q1 and Q5 combinations, it is assumed that the conducting numbers that are marked of conducting mark D1 of Q1 and Q2 combinations are 4 times, Q2 and Q6 combinations
The conducting number that conducting mark D2 is marked is 4 times, and the conducting number that the conducting mark D3 of Q2 and Q4 combinations is marked is 4 times,
The conducting number that the conducting mark D4 of Q3 and Q4 combinations is marked is 3 times, and what the conducting mark D5 that Q3 and Q5 are combined was marked leads
Logical number is 3 times, and the conducting number that the conducting mark D6 of Q1 and Q5 combinations is marked is 3 times, then drive control unit according to
Default turn-on sequence detects the conducting label of each power switch tube combination successively, and 3 be minimum conducting number, wherein D4,
The conducting number of D5 and D6 is equal, then power switch tube to be connected for the first time is determined according to the sequencing of default turn-on sequence
Combination, hence, it can be determined that the corresponding power switch tubes of D4 are combined as current power switch tube combination to be connected for the first time.
The brshless DC motor that present embodiment provides, when inversion unit starts, driving unit is suitable according to default conducting
Sequence detects the conducting number of each power switch tube combination, avoids the occurrence of the case where combining missing inspection to N number of power switch tube,
Meanwhile by the conducting number of label be connected for the first time, it can fast and accurately determine power switch tube to be connected for the first time
Combination.By the control of drive control unit, avoids when starting the brshless DC motor every time, first turn on fixed position
Power switch tube combines, and reduces the performance difference of the power switch tube between N number of power switch tube combination, it is brushless to enhance this
The service life of direct current generator.
The third embodiment of the utility model is related to a kind of brshless DC motor.In the utility model third embodiment
In, brshless DC motor further includes：Position sensor；Position sensor be arranged on motor body, respectively with motor body and
Drive control unit connects, and the location information be connected for the first time is combined for detecting N number of power switch tube.
Specifically, drive control unit receives the signal of position sensor, and can be obtained according to the signal and be led for the first time
The location information of logical power switch tube combination and conducting identify, for example, it is assumed that drive control unit on startup, receives for the first time
The signal of position sensor transmission be " 101 ", then by processing, you can it is Q1 and Q2 to obtain the power switch tube that is connected for the first time
Combination.Therefore, the conducting situation of N number of power switch tube combination can be fast and accurately determined by position sensor.
Drive control unit controls N number of power switch when inversion unit starts according to conducting information in present embodiment
The conducting of pipe combination is roughly the same with first embodiment or second embodiment, and details are not described herein again.
The brshless DC motor that present embodiment provides, further includes position sensor, is believed by the position of position sensor
Breath, drive control unit can fast and accurately determine the conducting information of N number of power switch tube combination, accelerate drive control list
The speed of member control power switch tube conducting.
It will be understood by those skilled in the art that the respective embodiments described above are to realize the specific implementation of the utility model
Example, and in practical applications, can to it, various changes can be made in the form and details, without departing from the spirit of the utility model
And range.
Claims (9)
1. a kind of brshless DC motor, which is characterized in that including：Motor body, drive control unit and include N number of power switch
The inversion unit of pipe combination, N are the integer more than 2；
The motor body is electrically connected with the inversion unit；
The drive control unit combines connection with N number of power switch tube respectively, when the inversion unit starts, is used for
It records N number of power switch tube and combines the conducting information be connected for the first time, and N number of power switch is controlled according to the conducting information
The conducting for the first time of pipe combination.
2. brshless DC motor according to claim 1, which is characterized in that the conducting information includes：Each power is opened
Close the location information that pipe combination is connected for the first time and the conducting mark that the combination of each power switch tube is connected for the first time.
3. brshless DC motor according to claim 2, which is characterized in that the conducting mark is used to indicate described inverse
Whether the power switch tube combination is connected for the first time when becoming unit starting, and the drive control unit is specifically used for：
In the case where the inversion unit receives enabled instruction, according to the default turn-on sequence that N number of power switch tube combines, inspection
The conducting for surveying the combination of each power switch tube identifies whether that instruction is connected for the first time, if so, detecting next group of power switch tube
Otherwise the power switch tube combination of current detection is connected in combination for the first time.
4. brshless DC motor according to claim 2, which is characterized in that the conducting mark is for marking the power
Switching tube combines the conducting number be connected for the first time, and the drive control unit is specifically used for：
In the case where the inversion unit receives enabled instruction, according to the default turn-on sequence that N number of power switch tube combines, inspection
The conducting for surveying the combination of each power switch tube identifies marked conducting number；
According to the conducting number of N number of power switch tube combination and default turn-on sequence, power switch tube to be connected for the first time is determined
Combination, and the power switch tube combination to be connected for the first time of the determination is connected.
5. the brshless DC motor according to claim 3 or 4, which is characterized in that the drive control unit is additionally operable to：
Store the default turn-on sequence of N number of power switch tube combination.
6. brshless DC motor according to claim 5, which is characterized in that the inversion unit be include 3 bridge arms
Three-phase full-bridge inversion unit, each bridge arm are made of multiple power switch tube parallel connections, the intermediate nodes of 3 bridge arms respectively with institute
State the three interfaces electrical connection of motor body, wherein the power switch tube that each power switch tube combination includes belongs to respectively
In different bridge arms.
7. brshless DC motor according to claim 5, which is characterized in that the brshless DC motor further includes：Position
Sensor；
The position sensor is arranged on the motor body, connects respectively with the motor body and the drive control unit
It connects, the location information be connected for the first time is combined for detecting N number of power switch tube.
8. brshless DC motor according to claim 7, which is characterized in that the power switch tube is metal oxide half
Conductor field-effect transistor.
9. according to brshless DC motor described in claim 8, which is characterized in that N 6, and each power switch tube combines
In include 2 power switch tubes, wherein the drive control unit is electrically connected with each power switch tube.
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| CN201721674100.8U CN207720051U (en) | 2017-12-05 | 2017-12-05 | A kind of brshless DC motor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110120761A (en) * | 2017-12-05 | 2019-08-13 | 追觅科技（天津）有限公司 | A kind of brshless DC motor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110120761A (en) * | 2017-12-05 | 2019-08-13 | 追觅科技（天津）有限公司 | A kind of brshless DC motor |
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