CN206977175U - The motor of double air gaps design - Google Patents

Abstract

The utility model provides a kind of motor of double air gaps design, including stator and rotor, and it is mainly theed improvement is that, rotor it is cylindrical be in staged, i.e. rotor outer circle middle part indent, rotor outer circle both ends are boss；Air gap between rotor and stator includes the first air gap delta₁With interstice δ₂；First air gap delta₁Between rotor outer circle both ends boss and stator, interstice δ₂Between indent position among rotor outer circle and stator, length L₂.The utility model is rational in infrastructure, and technique is simple；Edge effect reduces, and reduces the electromagnetic sound of motor, and no-load current reduces, power factor (PF) increase；The increase of air gap, optimize harmonic field and harmonic leakage reactance, reduce added losses and temperature rise, reduce noise of motor, improve electric efficiency.

Description

The motor of double air gaps design

Technical field

It the utility model is related to a kind of motor, especially a kind of motor improved to air gap.

Background technology

As shown in figure 1, motor includes stator 1 and rotor 2, the air gap delta of motor is the space between motor stator and rotor, Its numerical value is decided by the rotor length between the diameter and bearing of diameter of stator bore, axle substantially.Stator does not turn, and rotor needs to rotate, institute It is necessary with air gap, different according to motor, size of gaps is also different.There is air-gap field 3 in air gap.

The size of air gap mainly has an impact to exciting current and power factor (PF) added losses, and air gap needs in the case of permission Will as far as possible take it is smaller come reduce exciting current increase power factor (PF).But air gap can not be too small, otherwise except influence Mechanical Reliability Outside, it can also increase harmonic field and harmonic leakage reactance, cause starting torque and torque capacity to reduce, harmonic torque and added losses Increase, and then temperature rise rising and noise become big.

In having designed, main flux not only passes through air gap in the range of iron core overall length, and has sub-fraction to turn from fixed Sub- end face is crossed, so as to produce edge effect.

The content of the invention

For the deficiencies in the prior art, the utility model provides a kind of motor of double air gaps design so that rotor It is cylindrical to make the air gap increase of motor middle part in staged, and edge air gap is constant, passes through the staged knot of rotor outer circle Structure, increase air gap, optimization design on the premise of edge effect is reduced.The technical solution adopted in the utility model is：

A kind of motor of double air gaps design, including stator and rotor, it is mainly theed improvement is that,

Rotor it is cylindrical be in staged, i.e. rotor outer circle middle part indent, rotor outer circle both ends are boss；Turn Air gap between son and stator includes the first air gap delta₁With interstice δ₂；

First air gap delta₁Between rotor outer circle both ends boss and stator,

Interstice δ₂Between indent position among rotor outer circle and stator, length L₂；

Interstice δ₂Width is more than the first air gap delta₁Width.

Further, two the first air gap deltas between rotor outer circle both ends boss and stator₁Length is identical, is L₁。

Further, L₂Length is L₁9~11 times of length.

Most preferably, L₂Length is L₁10 times of length.

The utility model has the advantage of：Outer circle of motor rotor Vehicle Processing is in staged, increases air gap, reduces edge effect Should；The utility model is rational in infrastructure, and technique is simple；Edge effect reduces, and reduces the electromagnetic sound of motor, and no-load current reduces, work( Rate factor increases；The increase of air gap, optimize harmonic field and harmonic leakage reactance, reduce added losses and temperature rise, reduce noise of motor, Improve electric efficiency.

Brief description of the drawings

Fig. 1 is traditional gap structure schematic diagram.

Fig. 2 is gap structure schematic diagram of the present utility model.

Embodiment

With reference to specific drawings and examples, the utility model is described in further detail.

As shown in Fig. 2 a kind of motor, including stator 1 and rotor 2；Stator 1 and rotor 2 respectively depict a half hitch in Fig. 2 Structure, another half structure are identical；

Rotor 2 passes through Vehicle Processing so that the cylindrical of rotor 2 is in staged, i.e. the cylindrical middle part indent of rotor 2, outside Circle both ends boss with existing rotor 2 is cylindrical is consistent；

The length at the cylindrical middle indent position of rotor 2 is L₂, cylindrical both ends boss length is L₁, thus, rotor 2 Air gap between stator 1 includes the first air gap delta₁With interstice δ₂；

First air gap delta₁Between the cylindrical both ends boss of rotor 2 and stator 1, length is L₁, both ends L can be reduced₁ The edge effect of length, the electromagnetic sound of motor is reduced, no-load current reduces, power factor (PF) increase；

Interstice δ₂Between the cylindrical middle indent position of rotor 2 and stator 1, length L₂, interstice δ₂Width More than the first air gap delta₁Width；L between motor stator 1 and rotor 2₂Length air gap increases, and optimizes harmonic field and harmonic leakage reactance, drop Lower added loss and temperature rise, noise of motor is reduced, improves electric efficiency；L₂Length is L₁9~11 times of length, 10 times is most It is good.

First air gap delta₁Width is equal to existing motor gas-gap δ width；Core length L=2L of motor₁+L₂。

Claims (4)

1. a kind of motor of double air gaps design, including stator (1) and rotor (2), it is characterised in that

The cylindrical of rotor (2) is in staged, i.e. the cylindrical middle part indent of rotor (2), and rotor (2) cylindrical both ends are lug boss Position；Air gap between rotor (2) and stator (1) includes the first air gap delta₁With interstice δ₂；

First air gap delta₁Between the cylindrical both ends boss of rotor (2) and stator (1),

Interstice δ₂Between the cylindrical middle indent position of rotor (2) and stator (1), length L₂；

Interstice δ₂Width is more than the first air gap delta₁Width.

2. the motor of double air gaps design as claimed in claim 1, it is characterised in that

Two the first air gap deltas between the cylindrical both ends boss of rotor (2) and stator (1)₁Length is identical, is L₁。

3. the motor of double air gaps design as claimed in claim 2, it is characterised in that

L₂Length is L₁9~11 times of length.

4. the motor of double air gaps design as claimed in claim 3, it is characterised in that

L₂Length is L₁10 times of length.