CN108667226B - Flat three-phase permanent magnet brushless direct current motor core - Google Patents
Flat three-phase permanent magnet brushless direct current motor core Download PDFInfo
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- CN108667226B CN108667226B CN201810562093.5A CN201810562093A CN108667226B CN 108667226 B CN108667226 B CN 108667226B CN 201810562093 A CN201810562093 A CN 201810562093A CN 108667226 B CN108667226 B CN 108667226B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/21—Devices for sensing speed or position, or actuated thereby
- H02K11/215—Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/30—Structural association with control circuits or drive circuits
- H02K11/33—Drive circuits, e.g. power electronics
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- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Brushless Motors (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
A flat three-phase permanent magnet brushless DC motor core integrates a three-phase permanent magnet brushless DC motor body, a Hall sensor and a control core, wherein the DC motor body comprises a stator core body, a rotor core body, a rotating shaft, a coil and a permanent magnet; the Hall sensor comprises three switch type Hall elements, three circular arc-shaped openings with 120-degree adjacent included angles and a Hall sensor protection seat on a support, wherein the circular arc-shaped openings are used for installing the Hall sensor; the control core part comprises a PCB circuit board, a wireless receiving chip, a 315MHz surface acoustic wave filter, a single chip microcomputer, a driving chip, a switching power supply chip, a VMOS tube, a signal conditioning chip, a high-frequency transformer, a constantan sampling resistor and a power inductor, wherein a motor body and the control core part are connected into a whole through a bracket, the diameter of the assembled core can be as low as 55mm, the thickness of the core is not more than 25mm, and the control core part is most economical and optimal in whole.
Description
Technical Field
The invention relates to a flat three-phase permanent magnet brushless direct current motor core which is mainly applied to the fields of household appliances, industrial robots, novel medical instruments and industrial automation control.
Background
Due to the limitation of size or installation size in the fields of household appliances, industrial robots, novel medical instruments and industrial automation, a three-phase permanent magnet brushless direct current motor with high efficiency, energy conservation, small size and flattening is often needed, but in order to reduce rotational inertia, a common three-phase permanent magnet brushless direct current motor is used to adopt a long and thin long-wheelbase structure, and the main size of the motor is determined by the following formula:
D2L=6.1*103/(αiAB＆)*P/n(m3)
in the formula, D is the diameter of the armature, L is the length of the armature, P is the calculated power, A is the electric load, B & is the magnetic load, n is the rated rotating speed, and α i is the polar arc coefficient.
The above formula shows that when the rated power and rated rotating speed of the three-phase permanent magnet brushless DC motor are determined, the main size D of the motor2L depends on the selection of the rotating speed n of the motor and the electromagnetic load AB & lt & gt of the motor, and the size of the motor can be small when the rotating speed n of the motor is higher; the higher the value of the electromagnetic load AB & the smaller the main dimension D2L of the motor. This means that the lighter the weight of the machine, the higher the power density.
From the perspective of motor design, to achieve high power density, a material with good magnetic conductivity should be selected to improve magnetic load B & lt & gt; under the condition of ensuring insulation, a high-temperature-resistant insulating material needs to be selected to improve the heat load capacity of the motor.
After the motor material is selected, the iron loss of the motor is increased along with the increase of the magnetic load B & lt & gt, and the copper loss is in direct proportion to the product of the charge A and the current density J. Therefore, the size of the motor can be reduced by increasing the electromagnetic load AB & lt & gt, but the loss per unit area of the surfaces of the stator and the rotor is increased, so that the temperature of the motor is increased, and the efficiency is reduced. It is therefore of great importance to select the electromagnetic load AB & and the topology of the machine appropriately.
Under the condition of a certain product of electromagnetic load AB & lt & gt, an optimized proportional relation exists between the electric load A and the magnetic load B & lt & gt: generally, in order to improve the commutation performance of the motor, it is desirable to choose a larger B & and a smaller A value; the motor running under the low-speed working condition has small iron loss and can select the B & value to be large; the motor running at high speed has larger iron loss and smaller B & value.
On the other hand, the existing three-phase permanent magnet brushless direct current motor can not be used independently, and is matched with an external controller and an internal Hall sensor for use. The Hall sensor plays a role in detecting the position of the rotor magnetic pole in the three-phase permanent magnet brushless direct current motor, correct reversing information is provided for a logic switch circuit, namely, a position signal of the rotor magnetic steel magnetic pole is converted into an electric signal, then the reversing conduction of the stator winding is controlled, the armature reaction and the position change of the Hall sensor have large influence on the Hall detection signal, the current conversion of the motor winding is directly influenced, and the torque fluctuation of the motor is caused, so that the noise is brought. Therefore, one purpose of the invention is to design a flat three-phase permanent magnet brushless direct current motor core which integrates a motor body, a control core and a Hall sensor into a whole, and can be used as an asynchronous motor after being directly electrified by matching with a bearing and different shells.
Disclosure of Invention
Accordingly, the invention provides a design scheme of a flat three-phase permanent magnet brushless direct current motor core. In the scheme, the three-phase permanent magnet brushless dc motor body refers to a three-phase permanent magnet brushless dc motor (excluding a motor housing) which only has an electromagnetic component and does not have an electronic control component, and the specific contents are as follows:
the utility model provides a flat three-phase permanent magnetism brushless DC motor core, comprises three-phase permanent magnetism brushless DC motor body, control core, hall sensor triplex, and its main points lie in:
three-phase permanent magnet brushless DC motor body, control core and hall sensor three pass through the leg joint respectively, close three and be one, constitute a flat three-phase permanent magnet brushless DC motor core, wherein:
the three-phase permanent magnet brushless direct current motor body comprises a rotor core body, a stator core body, a permanent magnet, a rotating shaft and a coil;
the stator core body is provided with a coil embedding groove, a coil is embedded into the coil embedding groove, the stator core body is provided with a hole for fixing a bracket, the outer side edge of the stator core body is provided with four wedge-shaped side groove stator core bodies with adjacent 90-degree included angles, and the inner side edge of each stator core body is provided with three arc-shaped openings with adjacent 120-degree included angles;
the rotor core body is provided with permanent magnet caulking grooves, a separation groove is arranged between two adjacent permanent magnet caulking grooves at the edge of the rotor core body, and the permanent magnets are buried and embedded into the permanent magnet caulking grooves;
the rotating shaft is provided with a rotating shaft disc which is tightly embedded into the rotor core body;
the control machine core and the Hall sensor part comprise a PCB (printed circuit board), the PCB is in a ring shape, a wireless receiving chip, a 315MHz surface acoustic wave filter, a single chip microcomputer, a driving chip, a switching power supply chip, a VMOS (virtual machine operating System) tube, a programming download socket, a Hall sensor, a signal conditioning chip, a high-frequency transformer, a constantan sampling resistor and a power inductor are welded on the PCB, the Hall sensor is a three-wire direct-insertion switch type Hall element, a PCB mounting hole, a Hall-A wiring welding hole, a Hall-B wiring welding hole and a Hall-C wiring welding hole are formed in the PCB, the VMOS tube is packaged in a patch mode and is directly surface-mounted and welded on the PCB;
the single chip microcomputer is a core device, an I/O pin of the single chip microcomputer is connected with an input pin of a driving chip, an output pin of the driving chip is connected with a grid electrode of a VMOS tube, a 315MHz surface acoustic wave filter is connected with a wireless receiving chip, an output pin of the wireless receiving chip is connected with a serial pin on the single chip microcomputer, sampling data of the constantan sampling resistor is preprocessed by a signal conditioning chip and then is sent to an A/D pin of the single chip microcomputer, three position sensing signals from a Hall sensor are respectively sent to an external interrupt pin of the single chip microcomputer, and a programming download socket is connected with a program download pin of the single chip microcomputer;
an external direct current power supply is transmitted to one end of the input side of the high-frequency transformer, the other end of the input side of the high-frequency transformer is connected with the switching power supply chip, and a voltage signal at the output side of the high-frequency transformer is rectified and filtered by the power inductor and the capacitor to provide a power supply for the PCB;
the support is in a ring shape and is formed by injection molding of heat-resistant ABS engineering plastics, a circular inner lining plate extends out of a central opening, three Hall sensor protection seats with adjacent included angles of 120 degrees and four support steps with adjacent included angles of 90 degrees are arranged at the bottom of the support, wedge-shaped grooves are formed in the edges of the support steps, and a support hole is formed in the middle of the support steps;
when the device is installed, the circular PCB is placed in the bracket, the wedge-shaped groove on the step of the bracket corresponds to the wedge-shaped edge groove at the outer edge of the stator core body, the pins of the three Hall sensors penetrate through the Hall sensor protection seat and are respectively connected with the Hall-A wiring welding hole, the Hall-B wiring welding hole and the Hall-C wiring welding hole on the PCB, the Hall sensors after being firmly welded are embedded into the arc-shaped opening on the stator core body, and fixed by welding glue, the magnetic induction plane of the Hall sensor faces to the rotor iron core body, then, the screw passes through PCB circuit board mounting hole, support hole on the support step and is even as an organic whole with the fixed bolster hole on the stator core body, and the triplex becomes one, and the three-phase permanent magnetism brushless DC motor core diameter after the assembly is as low as 55mm, and the core thickness (even the pivot together) is no longer than 25 mm.
Furthermore, the permanent magnet is made of neodymium iron boron materials.
Furthermore, the coil is wound by an oxygen-free copper wire.
Furthermore, the constantan sampling resistor is bent into an M shape.
Furthermore, the wireless receiving chip supports the operation of a 315MHz handheld wireless remote controller.
Drawings
In order to clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required in the embodiments will be briefly described below.
Fig. 1 is a first external view of a flat three-phase permanent magnet brushless dc motor core;
fig. 2 is a second outline view of a flat three-phase permanent magnet brushless dc motor core;
fig. 3 is an exploded view of a flat three-phase permanent magnet brushless dc motor core;
fig. 4 is an exploded view of a flat three-phase permanent magnet brushless dc motor core;
FIG. 5 is a schematic diagram of a PCB circuit board of a flat three-phase permanent magnet brushless DC motor core;
FIG. 6 is a mounting diagram of a bracket and a Hall element;
FIG. 7 is a schematic view of the rotor shaft, the rotor core, the stator core and the coil;
FIG. 8 is a schematic view of the rotor core, the rotor core and the stator core.
Description of reference numerals:
1 rotor core body
11 permanent magnet caulking groove
12 dividing groove
2 stator core body
21 coil caulking groove
22 fixed support hole
23 circular arc opening
24 wedge-shaped side groove
3 permanent magnet
4 rotating shaft
41 rotating shaft disc
5 thread package
6 PCB circuit board
60 wireless receiving chip
61 single chip microcomputer
62 drive chip
63 switching power supply chip
64 surface acoustic wave filter
65 VMOS pipe
66 programming download socket
67 Hall sensor
68 signal conditioning chip
69 high-frequency transformer
690 Hall-A wiring soldering hole
691 Hall-B wiring hole
692 Hall-C wiring hole
693 PCB circuit board mounting hole
694 constantan sampling resistor
695 power inductor
7 support
71 circular inner lining plate
72 support step
73 bracket hole
74 wedge-shaped groove
75 Hall sensor protective seat
Detailed Description
The following description of the embodiments of the present invention is provided with reference to the accompanying drawings:
the utility model provides a flat three-phase permanent magnetism brushless DC motor core, comprises three-phase permanent magnetism brushless DC motor body, control core and hall sensor triplex, and its main points lie in:
three-phase permanent magnet brushless DC motor body, control core and hall sensor three connect through support 7 respectively, close three and be one, constitute a flat three-phase permanent magnet brushless DC motor core, wherein:
the three-phase permanent magnet brushless direct current motor body comprises a rotor core body 1, a stator core body 2, a permanent magnet 3, a rotating shaft 4 and a coil 5;
the stator core body 2 is provided with a coil embedding groove 21, a coil 5 is embedded in the coil embedding groove 21, the stator core body 2 is provided with a fixing support hole 22, the outer side edge of the stator core body 2 is provided with four wedge-shaped side grooves 24 with adjacent included angles of 90 degrees, and the inner side edge of the stator core body 2 is provided with three arc-shaped openings 23 with adjacent included angles of 120 degrees;
the rotor core body 1 is provided with permanent magnet caulking grooves 11, a separation groove 12 is formed between two adjacent permanent magnet caulking grooves 11 at the edge of the rotor core body 1, and the permanent magnets 3 are buried and embedded in the permanent magnet caulking grooves 11;
the rotating shaft 4 is provided with a rotating shaft disc 41, and the rotating shaft disc 41 is tightly embedded into the rotor core body 1;
the control machine core and the Hall sensor part comprise a PCB (printed circuit board) 6, the PCB 6 is in a ring shape, a wireless receiving chip 60, a 315MHz surface acoustic wave filter 64, a single chip microcomputer 61, a driving chip 62, a switching power supply chip 63, a VMOS (virtual vehicle operating system) tube 65, a programming download socket 66, a Hall sensor 67, a signal conditioning chip 68, a high-frequency transformer 69, a constantan sampling resistor 694 and a power inductor 695 are welded on the PCB 6, the Hall sensor 67 is a three-wire switch type Hall element, a PCB mounting hole 693, a Hall-A wiring welding hole 690, a Hall-B wiring welding hole 691 and a Hall-C wiring welding hole 692 are formed in the PCB 6, and the VMOS tube 65 is packaged by a patch and is directly welded on the PCB 6 in a surface-pasting manner;
the single chip microcomputer 61 is a core device, an I/O pin of the single chip microcomputer 61 is connected with an input pin of a driving chip 62, an output pin of the driving chip 62 is connected with a grid electrode of a VMOS tube, a 315MHz surface acoustic wave filter 64 is connected with a wireless receiving chip 60, an output pin of the wireless receiving chip 60 is connected with a serial pin on the single chip microcomputer 61, sampling data of the constantan sampling resistor 694 is preprocessed by a signal conditioning chip 68 and then sent to an A/D pin of the single chip microcomputer 61, three position sensing signals from a Hall sensor 67 are respectively sent to an external interrupt pin of the single chip microcomputer 61, and the programming download socket 66 is connected with a program download pin of the single chip microcomputer 61;
an external direct current power supply is sent to one end of the input side of the high-frequency transformer 69, the other end of the input side of the high-frequency transformer 69 is connected with the switching power supply chip 63, and a voltage signal at the output side of the high-frequency transformer 69 is rectified, filtered by the power inductor 695 and the capacitor and then provides a power supply for the PCB 6;
the support 7 is in a ring shape, a circular inner lining plate 71 extends out of a central opening, three Hall sensor protection seats 75 with adjacent included angles of 120 degrees and four support steps 72 with adjacent included angles of 90 degrees are arranged at the bottom of the support 7, wedge-shaped grooves 74 are formed in the edges of the support steps 72, and support holes 73 are formed in the middle of the support steps;
during installation, the circular PCB 6 is placed in the bracket 7, the wedge-shaped groove 74 on the bracket step 72 corresponds to the wedge-shaped edge groove 24 on the outer edge of the stator core body 2, the pins of the three Hall sensors 67 penetrate through the Hall sensor retainer 75 and then are respectively connected with the Hall-A wiring welding hole 690, the Hall-B wiring welding hole 691 and the Hall-C wiring welding hole 692 on the PCB 6, the firmly welded Hall sensors 67 are embedded into the arc-shaped opening 23 on the stator core body 2 and are fixed by welding glue, the magnetic induction plane of the Hall sensors 67 faces to the rotor core body 1, then the screws penetrate through the PCB mounting hole 693 and the bracket hole 73 on the bracket step 72 and then are connected with the fixed bracket hole 22 on the stator core body 2 into a whole, the three parts are a whole, the diameter of the assembled three-phase permanent magnet brushless DC motor core is as low as 55mm, the thickness of the movement (together with the rotating shaft) is not more than 25 mm.
The permanent magnet 3 is made of neodymium iron boron materials.
The coil 5 is wound by an oxygen-free copper wire.
The constantan sampling resistor 694 is bent into an M shape.
The wireless receiving chip 60 supports the operation of a 315MHz handheld wireless remote controller.
It should be noted that the hall sensor 67 has the following position sensing relationship: when the rotor rotates, when the magnetic induction plane of the Hall sensor 67 detects that the magnetic induction intensity of the permanent magnet 3 buried in the permanent magnet embedding slot 11 in the rotor core body 1 reaches a trigger threshold value, the switch of the Hall sensor 67 is switched on; when the magnetic induction intensity decreases to the closing threshold, the switch of the hall sensor 67 is turned off; when the magnetic induction B forms an angle θ with the normal of the plane of the hall sensor 67, the effective magnetic field acting on the hall sensor 67 is a component in the normal direction, i.e., Bcos θ, and when the hall sensor 67 is mounted with an angular deviation, the effective magnetic field of the hall sensor will change, and the deviation angle at this time is θ, so that the error value generated depends on the angle θ and the degree of change of the magnetic density in the normal direction of the magnetic sensitive region, and the hall sensor 67 is accurately inserted into the circular arc opening 23 on the stator core body 2, thereby overcoming the assembly error.
The invention has the following beneficial effects:
1. the invention relates to a three-phase permanent magnet brushless direct current motor core integrating three parts of a three-phase permanent magnet brushless direct current motor body, a Hall sensor and a control core, which changes the slender topological structure mode of the traditional three-phase permanent magnet brushless direct current motor and tends to be flat in structure, in particular to the combination of electromechanical, position sensor, real-time control, on-line protection and wireless remote control technologies into a whole, and a user can use the motor after assembling a bearing and a shell on the core and electrifying the motor, and the assembly is simple, thereby providing a solution of the flat three-phase permanent magnet brushless direct current motor core with low cost, large-scale production and convenient maintenance.
2. The invention adopts the system engineering design idea of the most economical and overall optimal system, is dedicated to the design of small size and flattening, has the diameter as low as 55mm, has the core thickness (together with a rotating shaft) not more than 25mm, and is particularly suitable for various small household appliances and novel medical instruments.
3. The invention uses the constantan sampling resistor as a current monitoring element, thereby strengthening the online protection of the control machine core to the motor, being capable of coping with the locked-rotor current and the surge overcurrent in time and playing a good protection role to the VMOS tube.
4. The invention adopts 315MHz wireless receiving mode, can carry on the operation, stop, reverse, accelerate, slow down to the three-phase permanent magnet brushless DC motor and carry on the wireless control, the concrete scheme is, after the serial pin of the one-chip computer receives the data from 315MHz wireless receiving chip output, through its decoding operation, can carry on the operation, stop, reverse, accelerate, slow down control to the drive circuit of the three-phase permanent magnet brushless DC motor, thus does not need to add the control line additionally.
In the present invention, the inventor does not draw a specific motor housing, and if the motor housing is to be installed in a motor housing provided by a third party, the inside of the externally-equipped motor housing is required to be provided with a wedge-shaped rib, so that the three-phase permanent magnet brushless dc motor core can be uniformly and tightly inserted into the motor housing with the inner wedge-shaped rib through the wedge-shaped groove 74 on the bracket step 72 and the wedge-shaped edge groove 24 at the outer edge of the stator core body 2.
In the invention, the inventor does not embed a bearing on the rotating shaft, and the intention of throwing bricks and leading jade is obvious: if the three-phase permanent magnet brushless DC motor core is matched with different shells and wireless remote controllers, various wireless remote control type soymilk makers, juicers, mixers, massage instruments, ventilation fans, electric fans, centrifuges, electric shredders, automatic floor sweepers and electric mops can be manufactured. In a word, the imagination is more wonderful, and the world in which the imagination is applied is more abundant.
What has been described above is a preferred embodiment of the present invention. In the present specification, the principle and the embodiment of the present invention are described by using specific examples, which are only used to help understand the core idea of the present invention and should not be construed as limiting the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (5)
1. The utility model provides a flat three-phase permanent magnetism brushless DC motor core, comprises three-phase permanent magnetism brushless DC motor body, control core and hall sensor triplex, its characterized in that:
three-phase permanent magnet brushless DC motor body, control core, hall sensor three connect through support (7) respectively, close three and be one, constitute a flat three-phase permanent magnet brushless DC motor core, wherein:
the three-phase permanent magnet brushless direct current motor body comprises a rotor core body (1), a stator core body (2), a permanent magnet (3), a rotating shaft (4) and a coil (5);
the stator core body (2) is provided with a coil embedding groove (21), a coil (5) is embedded into the coil embedding groove (21), the stator core body (2) is provided with a fixing support hole (22), the outer side edge of the stator core body (2) is provided with four wedge-shaped side grooves (24) with adjacent 90-degree included angles, and the inner side edge of the stator core body (2) is provided with three arc-shaped openings (23) with adjacent 120-degree included angles;
the rotor core body (1) is provided with permanent magnet caulking grooves (11), a separation groove (12) is formed between two adjacent permanent magnet caulking grooves (11) at the edge of the rotor core body (1), and the permanent magnets (3) are buried and embedded into the permanent magnet caulking grooves (11);
the rotating shaft (4) is provided with a rotating shaft disc (41), and the rotating shaft disc (41) is tightly embedded into the rotor core body (1);
the control machine core and the Hall sensor part comprise a PCB (printed circuit board) (6), the PCB (6) is in a circular ring shape, a wireless receiving chip (60), a 315MHz surface acoustic wave filter (64), a singlechip (61), a driving chip (62), a switching power supply chip (63), a VMOS tube (65), a programming download socket (66), a Hall sensor (67), a signal conditioning chip (68), a high-frequency transformer (69), a constantan sampling resistor (694) and a power inductor (695) are welded on the PCB, the Hall sensor (67) is a three-wire direct insertion switch type Hall element, a PCB mounting hole (693), a Hall-A wiring welding hole (690), a Hall-B wiring welding hole (691) and a Hall-C wiring welding hole (692) are formed in the PCB (6), the VMOS tube (65) is packaged by a patch, the direct surface is pasted and welded on the PCB (6);
the single chip microcomputer (61) is a core device, an I/O pin of the single chip microcomputer (61) is connected with an input pin of a driving chip (62), an output pin of the driving chip (62) is connected with a grid electrode of a VMOS (VMOS) tube, a 315MHz surface acoustic wave filter (64) is connected with a wireless receiving chip (60), an output pin of the wireless receiving chip (60) is connected with a serial pin on the single chip microcomputer (61), sampling data of a constantan sampling resistor (694) is preprocessed by a signal conditioning chip (68) and then sent to an A/D pin of the single chip microcomputer (61), three position sensing signals from a Hall sensor (67) are respectively sent to an external interrupt pin of the single chip microcomputer (61), and a programming download socket (66) is connected with a program download pin of the single chip microcomputer (61);
an external direct current power supply is sent to one end of the input side of the high-frequency transformer (69), the other end of the input side of the high-frequency transformer (69) is connected with the switching power supply chip (63), and a voltage signal at the output side of the high-frequency transformer (69) is rectified, filtered by the power inductor (695) and the capacitor and then provided for a power supply of the PCB (6);
the support (7) is annular and is formed by injection molding of heat-resistant ABS engineering plastics, a circular inner lining plate (71) extends out of a central opening, three Hall sensor guard seats (75) with adjacent included angles of 120 degrees and four support steps (72) with adjacent included angles of 90 degrees are arranged at the bottom of the support (7), wedge-shaped grooves (74) are formed in the edges of the support steps (72), and a support hole (73) is formed in the middle of the support step;
when the device is installed, the circular PCB (6) is placed in a support (7), the wedge-shaped groove (74) on the step (72) of the support corresponds to the wedge-shaped side groove (24) on the outer side edge of the stator iron core body (2), the pins of the three Hall sensors (67) penetrate through the Hall sensor retaining seats (75) and are respectively connected with the Hall-A wiring welding holes (690), the Hall-B wiring welding holes (691) and the Hall-C wiring welding holes (692) on the PCB (6), the Hall sensors (67) after being welded are embedded into the circular-arc-shaped openings (23) on the stator iron core body (2) and are fixed by welding glue, the magnetic induction plane of the Hall sensors (67) faces the rotor iron core body (1), then, the screws penetrate through the PCB mounting holes (693) and the support holes (73) on the step (72) of the support and are connected with the fixed support holes (22) on the stator iron core body (2) into a whole, the three parts are combined into one, the diameter of the assembled three-phase permanent magnet brushless direct current motor core is as low as 55mm, and the thickness of the whole motor is not more than 25 mm.
2. The flat three-phase permanent magnet brushless DC motor core of claim 1, characterized in that: the permanent magnet (3) is made of neodymium iron boron materials.
3. The flat three-phase permanent magnet brushless DC motor core of claim 1, characterized in that: the coil (5) is wound by an oxygen-free copper wire.
4. The flat three-phase permanent magnet brushless DC motor core of claim 1, characterized in that: the constantan sampling resistor (694) is bent into an M shape.
5. The flat three-phase permanent magnet brushless DC motor core of claim 1, characterized in that: the wireless receiving chip (60) supports the operation of a 315MHz handheld wireless remote controller.
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| CN201810562093.5A CN108667226B (en) | 2018-06-04 | 2018-06-04 | Flat three-phase permanent magnet brushless direct current motor core |
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| CN201810562093.5A CN108667226B (en) | 2018-06-04 | 2018-06-04 | Flat three-phase permanent magnet brushless direct current motor core |
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| CN108667226B true CN108667226B (en) | 2020-02-14 |
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| CN107317452A (en) * | 2017-08-21 | 2017-11-03 | 彭希南 | Integrated permanent magnetism brushless direct current wheel hub motor |
| CN107482867A (en) * | 2017-08-21 | 2017-12-15 | 彭希南 | A kind of three-phase permanent brushless DC hub motor |
| CN107332373A (en) * | 2017-08-22 | 2017-11-07 | 彭希南 | Permanent magnetic brushless stator and rotor structure of a kind of high pulling torque with cooling water pipe |
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| CN108667226A (en) | 2018-10-16 |
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Effective date of registration: 20230920 Address after: No. 29 Jinqiao Road, Zone A, Jianqiao Industrial Park, Dadukou District, Chongqing, 400000 Patentee after: Chongqing Huarui Miki Electrical Co.,Ltd. Address before: 410003 Hunan province Changsha Kaifu District Sifangping teachers village 5 Building No. 402 Patentee before: Peng Xinan |