CN202772735U

CN202772735U - Novel mounting structure for Hall sensors in electric power-assisted vehicle motor stator

Info

Publication number: CN202772735U
Application number: CN2012204056750U
Authority: CN
Inventors: 刘延海; 马建伟
Original assignee: Tianjin Yadi Industry Co Ltd
Current assignee: Tianjin Yadi Industry Co Ltd
Priority date: 2012-08-16
Filing date: 2012-08-16
Publication date: 2013-03-06
Anticipated expiration: 2022-08-16

Abstract

The utility model relates to a novel mounting structure for Hall sensors in an electric power-assisted vehicle motor stator, wherein a motor stator is mounted at the outer edge of a rear wheel axle, a motor rotor is mounted at the inner side of a rear wheel hub, the stator is equipped with three Hall sensors, any two adjacent Hall sensors among the three Hall sensors include an electric phase angle multiples of 60 DEG or 120 DEG, and the three Hall sensors are all embedded at the tooth-shaped outer edge of the stator. According to the technical scheme, the three Hall sensors are all embedded at the tooth-shaped outer edge of the motor stator, and any two adjacent Hall sensors among the three Hall sensors include an electric phase angle multiples of 60 DEG or 120 DEG, such that the waveform zero point of the second Hall sensor mutually coincides with the position zero point of a back electromotive force waveform, thereby reducing motor noise, and increasing motor efficiency by 2%; and the Hall sensors are fixedly mounted on the stator, thereby reducing mounting difficulty and error for operators, and enabling the motor to work more stably and safely.

Description

The mounting structure of Hall element in the Novel electric moped motor stator

Technical field

The utility model relates to the Hall element mounting technique field in the electric booster cycle motor stator, the mounting structure of Hall element in especially a kind of Novel electric moped motor stator.

Background technology

Moped Scooter is the walking-replacing tool that a kind of riding speed is fast, loading capacity is large, and it is by the motor-driven that trailing wheel is installed, and stator and the axletree of this motor are fixed together, and rotor and wheel hub are fixed together, and make Vehicle Driving Cycle when rotor rotates.Three Hall elements are installed on the said stator, and it mainly plays two effects: 1. the position of detection rotor permanent magnet pole relative stator armature winding, to determine the conducting order of power transistor in the electronic commutation circuit; 2. determine the angle of flow of power transistor in the electronic commutation circuit, determine thus the magnetic state of armature field.As seen, Hall element plays an important role to the normal operation of motor.

In actual production, such as Fig. 2, shown in 3, stator 1 is interfixed by a plurality of sheet metals 6 and consists of, then the computational methods by routine calculate three

Hall elements

2,4,5 installation site, electric phase angle between these three Hall elements is the integral multiple of 60 degree or 120 degree, but because existing a lot of producers only consider conveniently when choosing the installation site of three Hall elements, cause the error of installation very large, as shown in Figure 3, the second Hall element 4 is installed in two gaps between the tooth, at this moment, shown in black circles among Fig. 5, deviation appears in the position zero point of the waveform zero point of the second Hall element 4 and back emf waveform, finally causes the raising of motor noise, efficient is lower, and the consistency of motor performance is poor.

The utility model content

The purpose of this utility model is to overcome the deficiencies in the prior art, provides that noise is little, the mounting structure of Hall element in a kind of Novel electric moped motor stator of improving electric efficiency.

The technical scheme that the utility model is taked is:

The mounting structure of Hall element in a kind of Novel electric moped motor stator, comprise vehicle frame, trailing wheel and motor, the stator of motor is installed in the outer rim of axletree of rear wheel, the rotor of motor is installed in the inboard of rear-wheel hub, at stator three Hall elements are installed, electric phase angle in these three Hall elements between adjacent two Hall elements is the integral multiples of 60 degree or 120 degree, it is characterized in that: described three Hall elements all are inlaid in the outer rim of described stator outside profile of tooth.

And described stator outer rim is made groove, setting-in Hall element in this groove.

Advantage of the present utility model and good effect are:

In the utility model, three Hall elements all are inlaid in the outer rim of stator outside profile of tooth of motor and the electric phase angle between adjacent two Hall elements is the integral multiples of 60 degree or 120 degree, the position of the waveform zero point of the second Hall element and back emf waveform overlaps zero point thus, reduced the noise of motor, improved electric efficiency approximately 2%, stator is installed the position of Hall element and is fixed, operating personnel's installation difficulty and error have been reduced, make the work of motor more stable, the consistency of performance also improves.

Description of drawings

Fig. 1 is structural representation of the present utility model;

Fig. 2 is the vertical view that the first Hall element is installed profile of tooth among Fig. 1;

Fig. 3 is the structural representation of prior art;

Fig. 4 is the schematic diagram of the second Hall element waveform of the present utility model and back emf waveform;

Fig. 5 is the second Hall element waveform of prior art and the schematic diagram of back emf waveform;

Fig. 6 is three the Hall element installation site schematic diagrames (groove refers to two gaps between the profile of tooth, and the utmost point refers to the quantity of permanent magnet on the rotor) in 51 grooves, 46 utmost point stators;

Fig. 7 is three the Hall element installation site schematic diagrames (groove refers to two gaps between the profile of tooth, and the utmost point refers to the quantity of permanent magnet on the rotor) in 18 grooves, 20 utmost point stators.

Embodiment

Below in conjunction with embodiment, the utility model is further specified, following embodiment is illustrative, is not determinate, can not limit protection range of the present utility model with following embodiment.

The mounting structure of Hall element in a kind of Novel electric moped motor stator, shown in Fig. 1～7, comprise vehicle frame, trailing wheel and motor, this three is prior art, label not in the accompanying drawing, be not described in detail herein, the stator 1 of said motor is installed in the outer rim of axletree of rear wheel, the rotor of motor is installed in the inboard of rear-wheel hub, at stator the first Hall element 2 is installed, the second Hall element 4 and the 3rd Hall element 5, electric phase angle between two two adjacent Hall elements is the integral multiples of 60 degree or 120 degree, and innovation of the present utility model is: above-mentioned the first Hall element, the second Hall element and the 3rd Hall element all are inlaid in the outer rim of described stator outside profile of tooth 3.

In the present embodiment, stator fixedly consists of by a plurality of sheet metal 6 is mutually coaxial, behind the global formation, makes groove 7 in the outer rim of profile of tooth, the interior setting-in Hall element of groove.

As shown in Figure 6, be the stator structure in 51 grooves, 46 utmost point motors among this figure, when definition was the 1st profile of tooth topmost, three Hall elements were installed in respectively the 23rd, 26,29 profile of tooth outer rims.(groove refers to two gaps between the profile of tooth, and the utmost point refers to the quantity of permanent magnet on the rotor).As shown in Figure 7, be the stator structure in 18 grooves, 20 utmost point motors among this figure, when definition was the 1st profile of tooth topmost, three Hall elements were installed in respectively the 1st, 4,7 profile of tooth outer rims.

In the utility model, three Hall elements all are inlaid in the outer rim of stator outside profile of tooth of motor and the electric phase angle between adjacent two Hall elements is the integral multiples of 60 degree or 120 degree, after adopting this structure, shown in black circles among Fig. 4, the waveform zero point of the second Hall element and the position of back emf waveform overlap zero point, reduced the noise of motor, improved electric efficiency approximately 2%, stator is installed the position of Hall element and is fixed, operating personnel's installation difficulty and error have been reduced, make the work of motor more stable, the consistency of performance also improves.。

Claims

1. the mounting structure of Hall element in the Novel electric moped motor stator, comprise vehicle frame, trailing wheel and motor, the stator of motor is installed in the outer rim of axletree of rear wheel, the rotor of motor is installed in the inboard of rear-wheel hub, at stator three Hall elements are installed, electric phase angle in these three Hall elements between adjacent two Hall elements is the integral multiples of 60 degree or 120 degree, it is characterized in that: described three Hall elements all are inlaid in the outer rim of described stator outside profile of tooth.

2. the mounting structure of Hall element in a kind of Novel electric moped motor stator according to claim 1, it is characterized in that: described stator outer rim is made groove, setting-in Hall element in this groove.