CN202679206U - Hub type permanent magnet brushless DC motor for vehicles - Google Patents
Hub type permanent magnet brushless DC motor for vehicles Download PDFInfo
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- CN202679206U CN202679206U CN 201220345538 CN201220345538U CN202679206U CN 202679206 U CN202679206 U CN 202679206U CN 201220345538 CN201220345538 CN 201220345538 CN 201220345538 U CN201220345538 U CN 201220345538U CN 202679206 U CN202679206 U CN 202679206U
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Abstract
The utility model discloses a hub type permanent magnet brushless DC motor for vehicles, which is composed of an outer rotor and an inner stator, wherein the outer rotor includes a rotor casing, magnetic steel, and an end cover; and the inner stator includes a stator iron core, an iron core support, an armature winding, a center shaft and a Hall sensor. The inner side of the end cover is provided with a magnetic ring which synchronously rotates along with the end cover, wherein the magnetic ring and the magnetic steel are mutually concentric circles, the inner diameter of the magnetic ring is smaller than that of the stator iron core, the magnetic ring is provided with an alternative magnetic pole structure, and the number of the magnetic poles of the magnetic ring is the same as and corresponds to that of the magnetic steel. The Hall sensor is installed on the iron core support and close to the magnetic ring, and a magnetic induction surface of the Hall sensor faces directly to the magnetic ring. The motor disclosed by the utility model can change the temperature environment of the Hall sensor, and reduce the failure rate of the motor caused by malfunction or damage of the Hall sensor.
Description
Technical field
The utility model relates to a kind of motor, is specifically related to a kind of vehicle wheel hub formula permanent-magnet brushless DC electric machine.
Background technology
Wheel-hub permanent-magnet brushless DC motor is used in the electric motor car, and its control system is fairly simple, and cost is lower; Become the form of external rotor can effectively reduce the complexity of drive system of electric motor vehicle mechanical structure this design of electrical motor, can realize relatively easily direct driving, thereby the efficient of whole system is effectively improved, reduce cost.
Existing vehicle wheel hub formula permanent-magnet brushless DC electric machine (referring to Fig. 1, Fig. 2) is installed on the wheel hub 11, and it is made of external rotor and internal stator; External rotor comprises rotor casing 1, magnet steel 2 and end cap 6, and magnet steel is arranged on the rotor casing inner surface, and end cap is connected by screw on rotary piston machine shell-side limit, and rotor casing, magnet steel and end cap rotate synchronously; Internal stator comprises stator core 3, iron core bracket 5, armature winding 9, axis 10 and three Hall elements 8, stator core 3 is positioned at magnet steel 2 inboards, it is fixed on the axis 10 by iron core bracket 5, armature winding 9 is wrapped on the stator core 3, three interior and close magnet steel of groove that Hall element 8 is installed in respectively stator core 3, be used for induction external rotor location status (being the changes of magnetic field of inductive magnetic steel), the external rotor position state signal is flowed to CPU, CPU calculates according to the external rotor position signalling of collecting, and then sends size of current and the sense of current (i.e. commutation control) in the instruction control armature winding.The motor of this structure, three Hall elements are installed in the stator core, because after the energising of the armature winding of internal stator, the stator core heating, its copper loss or iron loss make the temperature of stator core very high, and Hall element is in hot environment, its performance drift, the external rotor position signalling that gathers is inaccurate, impact commutation control, and Hall element also very easily damages simultaneously; 20% electrical fault is all because Hall element is malfunctioning or damage causes.
Summary of the invention
The purpose of this utility model provides a kind of vehicle wheel hub formula permanent-magnet brushless DC electric machine, to change the temperature environment of Hall element, avoids Hall element malfunctioning or damage.
Vehicle wheel hub formula permanent-magnet brushless DC electric machine described in the utility model, consisted of by external rotor and internal stator, described external rotor comprises rotor casing, magnet steel and end cap, and described internal stator comprises stator core, iron core bracket, armature winding, axis and Hall element; Described end cap inboard is provided with the magnet ring that rotates synchronously with end cap, this magnet ring and magnet steel be concentric circles each other, the internal diameter of magnet ring is less than the internal diameter of stator core, magnet ring has the alternating poles structure, the number of magnetic poles of its number of magnetic poles and magnet steel identical and corresponding (the N utmost point that is magnet ring is extremely fully corresponding with the N of magnet steel, and the S utmost point of magnet ring is extremely complete corresponding with the S of magnet steel); Described Hall element is installed on the iron core bracket, and Hall element is near magnet ring, and its magnetic induction face is over against magnet ring.
Further, the quantity of described Hall element is two or three, and Hall element both can be Hall switch sensor, also can be linear hall sensor.
Further, described magnet ring is rubber magnet ring or ferromagnetic ring or alloy magnet ring; Described rubber magnet ring is comprised of rubber and magnetic material.
Further, the thickness of described magnet ring is 1mm～150mm; Preferably, the thickness of described magnet ring is 15mm～50mm.
The utility model arranges identical with a magnet steel number of magnetic poles and complete corresponding magnet ring in the end cap inboard, magnet ring and external rotor rotate synchronously, be equivalent to copy a magnet steel, two or three Hall elements are installed on the iron core bracket and close magnet ring, Hall element just can be determined the changes of magnetic field of magnet steel by the changes of magnetic field of this magnet ring of induction, and then definite external rotor location status.The position of Hall element is transferred one away from the place of stator core high-temperature region, thereby Hall element stability and reliability are improved, and the failure rate that motor is malfunctioning because of Hall element or damage causes has obtained reduction.
Description of drawings
Fig. 1 is the structural representation of existing vehicle wheel hub formula permanent-magnet brushless DC electric machine.
Fig. 2 is the schematic diagram that cooperates of external rotor and internal stator among Fig. 1.
Fig. 3 is the first structural representation of the present utility model.
Fig. 4 is the schematic diagram that cooperates of external rotor and internal stator among Fig. 3.
Fig. 5 is the second structural representation of the present utility model.
Fig. 6 is the schematic diagram that cooperates of external rotor and internal stator among Fig. 5.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
Embodiment 1:Vehicle wheel hub formula permanent-magnet brushless DC electric machine as shown in Figure 3, Figure 4, it is installed on the wheel hub 11, is made of external rotor and internal stator; External rotor comprises rotor casing 1, magnet steel 2 and end cap 6, magnet steel 2 is arranged on rotor casing 1 inner surface, end cap 6 is connected by screw at rotor casing 1 side, internal stator comprises stator core 3, iron core bracket 5, armature winding 9, axis 10 and three Hall elements 8, stator core 3 is positioned at magnet steel 2 inboards, it is fixed on the axis 10 by iron core bracket 5, and armature winding 9 is wrapped on the stator core 3; Be provided with rolling bearing 7 in the axis hole of end cap 6, the part that the axis hole outward flange is positioned at end cap 6 inboards is arranged with the magnet ring 4 that rotates synchronously with end cap 6, it is the alloy magnet ring of 45mm that magnet ring 4 adopts thickness, this magnet ring 4 and magnet steel 2 be concentric circles each other, the internal diameter of magnet ring 4 is less than the internal diameter of stator core 3, it (is N that magnet ring 4 has the alternating poles structure, the S interpolar is every arranging), the number of magnetic poles of its number of magnetic poles and magnet steel 2 is identical and corresponding, and (the N utmost point that is magnet ring 4 is extremely fully corresponding with the N of magnet steel 2, the S utmost point of magnet ring 4 is extremely fully corresponding with the S of magnet steel 2), rotor casing 1, magnet steel 2, end cap 6 and magnet ring 4 rotate synchronously; Three Hall elements 8 all adopt Hall switch sensor, it is respectively the arcuation interval and is installed on the iron core bracket 5, three Hall elements 8 are all near magnet ring 4, and its magnetic induction face is all over against the outside wall surface of magnet ring 4, the lead-in wire of three Hall elements 8 and armature winding 9 is outwards drawn by the endoporus of axis 10, in order to be connected with the outside electronic equipments such as electronic controller; Three Hall elements 8 just can be determined the changes of magnetic field of magnet steel 2 by the changes of magnetic field of reaction magnetic ring 4, and then definite external rotor location status.Hall element 8 also can only have two in the present embodiment, magnet ring 4 also can adopt rubber magnet ring or ferromagnetic ring, its thickness can also be for other numerical value between 1mm～150mm, and such as 15mm, 50mm etc., the power in the magnetic field that specifically can provide according to the magnet ring needs is determined.
Embodiment 2:Such as Fig. 5, vehicle wheel hub formula permanent-magnet brushless DC electric machine shown in Figure 6, it is installed on the wheel hub 11, is made of external rotor and internal stator; External rotor comprises rotor casing 1, magnet steel 2 and end cap 6, magnet steel 2 is arranged on rotor casing 1 inner surface, end cap 6 is connected by screw at rotor casing 1 side, internal stator comprises stator core 3, iron core bracket 5, armature winding 9, axis 10 and three Hall elements 8, stator core 3 is positioned at magnet steel 2 inboards, it is fixed on the axis 10 by iron core bracket 5, and armature winding 9 is wrapped on the stator core 3; Be provided with rolling bearing 7 in the axis hole of end cap 6, the magnet rings 4 that end cap 6 inboards are provided with the axis hole place of keeping at a certain distance away and end cap 6 rotates synchronously, it is the ferromagnetic ring of 4.5mm that magnet ring 4 adopts thickness, this magnet ring 4 and magnet steel 2 be concentric circles each other, the internal diameter of magnet ring 4 is less than the internal diameter of stator core 3, it (is N that magnet ring 4 has the alternating poles structure, the S interpolar is every arranging), the number of magnetic poles of its number of magnetic poles and magnet steel 2 is identical and corresponding, and (the N utmost point that is magnet ring 4 is extremely fully corresponding with the N of magnet steel 2, the S utmost point of magnet ring 4 is extremely fully corresponding with the S of magnet steel 2), rotor casing 1, magnet steel 2, end cap 6 and magnet ring 4 rotate synchronously; Three Hall elements 8 all adopt linear hall sensor, and it is respectively the arcuation interval and is installed on the iron core bracket 5, and three Hall elements 8 are all near magnet ring 4, and its magnetic induction face is all over against the end face of magnet ring 4.The lead-in wire of three Hall elements 8 and armature winding 9 is outwards drawn by the endoporus of axis 10, in order to be connected with the outside electronic equipments such as electronic controller; Three Hall elements 8 just can be determined the changes of magnetic field of magnet steel 2 by the changes of magnetic field of reaction magnetic ring 4, and then definite external rotor location status.Hall element 8 also can only have two in the present embodiment, magnet ring 4 also can adopt rubber magnet ring or alloy magnet ring, its thickness can also be for other numerical value between 1mm～150mm, and such as 10mm, 15mm, 80mm etc., the power in the magnetic field that specifically can provide according to the magnet ring needs is determined.
Claims (5)
1. vehicle wheel hub formula permanent-magnet brushless DC electric machine, consisted of by external rotor and internal stator, described external rotor comprises rotor casing (1), magnet steel (2) and end cap (6), and described internal stator comprises stator core (3), iron core bracket (5), armature winding (9), axis (10) and Hall element (8); It is characterized in that: described end cap (6) inboard is provided with the magnet ring (4) that rotates synchronously with end cap, this magnet ring and magnet steel (2) be concentric circles each other, the internal diameter of magnet ring is less than the internal diameter of stator core (3), magnet ring (4) has the alternating poles structure, and its number of magnetic poles is identical and corresponding with the number of magnetic poles of magnet steel (2); Described Hall element (8) is installed on the iron core bracket (5), and Hall element is near magnet ring, and its magnetic induction face is over against magnet ring.
2. vehicle wheel hub formula permanent-magnet brushless DC electric machine according to claim 1, it is characterized in that: the quantity of described Hall element (8) is two or three.
3. vehicle wheel hub formula permanent-magnet brushless DC electric machine according to claim 1 and 2, it is characterized in that: described magnet ring (4) is rubber magnet ring or ferromagnetic ring or alloy magnet ring.
4. vehicle wheel hub formula permanent-magnet brushless DC electric machine according to claim 3, it is characterized in that: the thickness of described magnet ring (4) is 1mm～150mm.
5. vehicle wheel hub formula permanent-magnet brushless DC electric machine according to claim 4, it is characterized in that: the thickness of described magnet ring (4) is 15mm～50mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220345538 CN202679206U (en) | 2012-07-17 | 2012-07-17 | Hub type permanent magnet brushless DC motor for vehicles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220345538 CN202679206U (en) | 2012-07-17 | 2012-07-17 | Hub type permanent magnet brushless DC motor for vehicles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202679206U true CN202679206U (en) | 2013-01-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220345538 Expired - Fee Related CN202679206U (en) | 2012-07-17 | 2012-07-17 | Hub type permanent magnet brushless DC motor for vehicles |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202679206U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103227544A (en) * | 2013-05-10 | 2013-07-31 | 宁波普尔机电制造有限公司 | Outer motor rotor BLDC (brushless direct current motor) electromotor for roller washing machine |
-
2012
- 2012-07-17 CN CN 201220345538 patent/CN202679206U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103227544A (en) * | 2013-05-10 | 2013-07-31 | 宁波普尔机电制造有限公司 | Outer motor rotor BLDC (brushless direct current motor) electromotor for roller washing machine |
| CN103227544B (en) * | 2013-05-10 | 2015-08-19 | 宁波普尔机电制造有限公司 | The outer rotor BLDC motor of a kind of roller washing machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130116 Termination date: 20140717 |
|
| EXPY | Termination of patent right or utility model |