CN201113582Y - Hub-type dc electric machine structure - Google Patents

Abstract

The utility model discloses a wheel hub type direct current motor structure, wherein a center frame of a wheel hub is provided with a stator evenly provided with 63 winding slots, outer sides of which are provided with 56 magnetic steel sheets arranged in 28 pairs, and a rotor is arranged between the inner side of an outer wheel hub and the stator; each winding slot is semi pyriform parallel tooth shaped; the diameter of each magnetic steel sheet is more than or equal to 250mm and less than or equal to 280mm. The utility model solves the problems existing in fractional-slot motors in present market that the design is unreasonable, the fractional ratio is not scientific, low speed and high speed control points are quite different and the saturation position is easily entered. Moreover, the direct current motor structure also has the advantages of making the motor uniformly stressed while operating, solving the problems of over large pulsation torque and abnormal shake and further improving the noise and vibration of the motor.

Description

The hub-type DC motor structure

Technical field

The utility model relates to a kind of motor, particularly a kind of structure of hub-type direct current machine.

Background technology

Motor of electric motor car is generally the hub-type direct current machine at present, requires the slow-speed of revolution, high pulling torque, low noise, high efficiency.But there are a lot of problems in used motor on the market now: the firstth, and efficient can not be done height; The secondth, the margin of power is little; The 3rd is that noise is bigger than normal; The 4th is that loss is big.The former of problem exists a lot of defectives, former motor to be mainly integer groove motor because of design, perhaps is the skewed slot motor.Integer groove motor can solve inefficient problem, but because its location moment of torsion is big, thereby it is excessive to cause pulsing, the sound abnormal sound.The skewed slot motor can solve the big problem of pulsation, but because out of plumb during the twist of magnetic field has very big influence to efficient.

Solve above problem and have only the fractional-slot motor to meet the demands, the fractional-slot motor subject matter on the present market is to design unreasonable, and the mark ratio is science not, and low speed and High-speed Control point differ far away, enter saturated place easily.

The utility model content

The purpose of this utility model is, provides a kind of durability good, widely used motor of electric motor car.

Adopt following technological means to realize in the utility model year:

A kind of hub-type DC motor structure, the center bearing bracket of wheel hub is provided with stator, is provided with rotor between the inboard of outer wheel hub and stator, and said stator is provided with several slot for windings, in the arranged outside of slot for winding several magnetic links is arranged;

Described winding slot is 63 of evenly issue; Described magnetic links is 28 pairs 56;

Aforesaid slot for winding is the parallel profile of tooth of half pyriform.

The diameter of aforesaid magnetic links is: 250mm≤diameter≤280mm.

The utility model compared with prior art has following remarkable advantages and beneficial effect:

A kind of hub-type DC motor structure of the utility model, problem at present existence, design the motor of 56 magnetic links of 63 grooves, because grooved and common electric machine have obvious difference, magnetic circuit is widened, and is equivalent to 7 cell cubes and works simultaneously, it is excessive so promptly to have solved the pulsation moment of torsion, shake has unusually solved the situation that efficient reduces again, most importantly can augmented reserve power, really solve the not science part that motor of electric motor car exists.

Description of drawings

Fig. 1 is the profile of the utility model hub-type DC motor structure.

Embodiment

Below in conjunction with accompanying drawing specific embodiment of the utility model is illustrated:

See also shown in Figure 1ly, be the profile of a kind of hub-type DC motor structure of the utility model, as can be seen from the figure:

1 outer wheel hub for connecting as one with rotor, 4 be winding slot, from illustrate, can obviously find out, this winding slot 4 be shaped as pyriform parallel teeth flute profile; Flute profile tooth portion cross section gradually changes, owing to adopted this shape, has therefore obviously improved intensity.

Be provided with the magnetic links 2 and 3 that is respectively the N utmost point and the S utmost point in the outside of winding slot.

In the present embodiment, fractional-slot motor mark ratio is:

$q=\frac{\mathrm{<figure-callout\; id="2"\; label="z"\; filenames="Y20072017543000061.png"\; state="\{\{state\}\}">z</figure-callout>}}{2\mathrm{pm}}$

In the formula: q is every mutually every utmost point groove number, and z is total groove number, and p is the magnetic pole logarithm, and 2p then is total magnetic links number, and m is the number of phases.Because this motor is 63 grooves, 56 magnet steel,

Following formula can be:

$q=\frac{63}{2*28*3}=\frac{63}{168}=\frac{3}{8}$

It is the mark that can not make an appointment with again, so per 8 extremely every 3 grooves that account for mutually.

Utmost point groove greatest common divisor; Kt=7, this motor can be divided into seven element analysises.

Adjacent slot spacing: a=p.360 °/z=28 * 360 °/63=160 ° electrical degree.

Pole span: τ=z/2p=63/56=9/8.

According to top each data as can be known this motor be fractional slot winding.

In the diagram motor, rotor is made up of 63 grooves and 56 magnet steel, then:

$q=\frac{63}{2*28*3}=\frac{3}{8}$

Be per 8 extremely every 3 grooves that account for mutually, that is to say that per 8 just can have 9 integer grooves extremely down, therefore through 8 extremely after mmf waves just duplicating, promptly whenever just form one-period after extremely through 8.This design has effectively reduced the Reeb that stator winding slot ripples magnetic field produces, and has reduced the size of radial load.Because this structure has guaranteed 7 cell cubes and has worked simultaneously, make motor stressed in working order evenly, it is excessive to have solved the pulsation moment of torsion, shake situations such as unusual, therefore motor oscillating and noise have also obtained very big improvement, thus also the raising of electric efficiency and peak power output has been play a part certain, simultaneously owing to stator slot shape is designed to the flute profile of parallel teeth, flute profile tooth portion cross section gradually changes, and intensity obviously obtains higher.

Because motor stator of the present utility model is made up of 63 grooves and 56 magnet steel, so can be divided into 7 parts to it, average every part is made up of 9 grooves and 8 magnet steel.When motor moves, the operation characteristic of these 7 parts, service behaviours etc. are on all four, we regard each part wherein as a cell cube, so machine operation is equivalent to 7 cell cubes and works simultaneously.

In the present embodiment, the diameter of magnetic links is: 250mm≤diameter≤280mm.

It should be noted that at last: above embodiment only in order to the explanation the utility model and and the described technical scheme of unrestricted the utility model; Therefore, although this specification has been described in detail the utility model with reference to each above-mentioned embodiment,, those of ordinary skill in the art should be appreciated that still and can make amendment or be equal to replacement the utility model; And all do not break away from the technical scheme and the improvement thereof of the spirit and scope of utility model, and it all should be encompassed in the middle of the claim scope of the present utility model.

Claims (3)

1. hub-type DC motor structure, the center bearing bracket of wheel hub is provided with stator, is provided with rotor between the inboard of outer wheel hub and stator, and said stator is provided with several slot for windings, in the arranged outside of slot for winding several magnetic links is arranged; It is characterized in that:

Described winding slot is 63 of evenly issue;

Described magnetic links is 28 pairs 56.

2. hub-type DC motor structure according to claim 1 is characterized in that: described slot for winding is the parallel profile of tooth of half pyriform.

3. hub-type DC motor structure according to claim 1 is characterized in that: the diameter of described magnetic links is: 250mm≤diameter≤280mm.

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