CN201937426U

CN201937426U - Brushless direct current (DC) permanent-magnetic motor

Info

Publication number: CN201937426U
Application number: CN2010206965797U
Authority: CN
Inventors: 李建军
Original assignee: ZHEJIANG SHUNGHUAN GEARS GROUP CO Ltd
Current assignee: ZHEJIANG SHUNGHUAN GEARS GROUP CO Ltd
Priority date: 2010-12-26
Filing date: 2010-12-26
Publication date: 2011-08-17
Anticipated expiration: 2020-12-26

Abstract

The utility model discloses a brushless direct current (DC) permanent-magnetic motor. Due to the permanent magnets of the traditional motor are stuck and wound on an ion core of a rotor, and additionally the temperature in the motor is relatively high, the permanent magnets are easy to loosen and break away when a high-power motor is in a condition with large torque and high-speed rotation. In the brushless DC permanent-magnetic motor, a plurality of protruded ribs are arranged on the outer wall of the iron core of the rotor, the upper end parts of the ribs are extended towards two sides, the permanent magnets are clamped between two adjacent ribs, the permanent magnets are fixedly clamped on the iron core, so that the permanent magnets cannot break away.

Description

A kind of brushless direct-current permanent magnet motor

[technical field]

The utility model belongs to the DC motor technical field, is meant a kind of brushless direct-current permanent magnet motor specifically.

[background technology]

Brshless DC motor replaces traditional mechanical commutation because of it by electronic commutation, possess plurality of advantages such as high life, high efficiency, low noise, good speed adjustment features, obtained paying attention to widely and developing, the brushless dc machine technology of small-power (generally below 4KW) has obtained significant progress, especially the appearance of high performance permanent magnetic materials makes small-power brushless dc machine technology be tending towards perfect.But along with the enhancing of people's environmental consciousness, the electric automobile industry is risen gradually in recent years, and low power direct current machine obviously is (electric automobile required motor power is more than the 10KW at present) of the power demand of the electric automobile that can't satisfy.And existing motor permanent magnet all is to paste or bondage is wrapped on the iron core of rotor of motor, and powerful motor is under big torque and high speed rotating situation, and it is higher to add the motor interior temperature, and permanent magnet is loosening easily to break away from.

[utility model content]

The purpose of this utility model provides a kind of brushless direct-current permanent magnet motor scheme, solves motor breaks away from iron core easily at high-power operation permanent magnet down problem.

The technical solution of the utility model is as follows: a kind of brushless direct-current permanent magnet motor, comprise a housing, pass the main shaft and the stator, rotor and the commutator that are arranged at housing of housing, rotor is made up of iron core and permanent magnet and is connected on the main shaft, the outer wall of described iron core is provided with the complex root rib of projection, extend to both sides and form the T font in the rib upper end, described permanent magnet is stuck between two adjacent ribs.

As further improvement of the utility model and optimization, the utility model is taked following measure:

Described rib vertically is distributed on the outer wall of iron core, and described rib has 2 to 8.Rib vertically distributes, and makes things convenient for permanent magnet from the loading and unloading of the end of iron core, rib quantity at most permanent magnet be stuck on the iron core firm more, but cost of manufacture also increases relatively.

Described iron core is cylinder, middle hollow out.Hollow out iron core under the intensity assurance situation, economical with materials are being arranged.

Described permanent magnet material is a neodymium iron boron.

Compared with prior art, outstanding advantage of the present utility model is: permanent magnet and iron core clamping make permanent magnet can not be thrown out of disengaging when motor rotates, and have adopted high temperature resistant and have the Nd-Fe-B permanent magnet of high-coercive force.

[description of drawings]

Fig. 1 is the utility model explosive view;

Fig. 2 is a rotor core structure schematic diagram of the present utility model;

Fig. 3 loads onto the schematic diagram of permanent magnet for the iron core of Fig. 2;

Fig. 4 is the left view of Fig. 2.

[embodiment]

Below in conjunction with accompanying drawing the utility model is done concrete description.

A kind of brushless direct-current permanent magnet motor, comprise a housing, pass the main shaft 1 of housing and be arranged at housing interior rotor 2, stator 3 and commutator, referring to Fig. 1, housing is by the radiating machine casing 4 of tubbiness, and front end housing 5 and rear end cap 6 are formed, and main shaft 1 is provided with packing ring 7 with the contact position of front and rear cover, stator 3 is enclosed within on the rotor 2, and rotor 2 is fixed on the main shaft 1.

Referring to Fig. 2-4, described rotor 2 is made up of iron core 21 and permanent magnet 22, the outer wall of described iron core 21 is provided with the complex root rib 23 of projection, extend to both sides and form the T font in rib 23 upper ends, described permanent magnet 22 is stuck between two adjacent ribs 23, and permanent magnet 22 materials are high temperature resistant and have the neodymium iron boron neodymium iron boron of high-coercive force.Described iron core 21 is cylinder, middle hollow out.Hollow out iron core 21 under the intensity assurance situation, economical with materials are being arranged.

Described rib 23 vertically is distributed on the outer wall of iron core 21, make things convenient for permanent magnet 22 from the loading and unloading of the two ends of iron core 21, described rib 23 has 8, rib 23 quantity at most permanent magnet 22 be stuck on the iron core 21 firm more, but cost of manufacture also increases relatively, 8 be compare comparatively ideal.

In the operation process of the high-power big torque of motor, the utility model adopts the mode of permanent magnet 22 and iron core 21 clampings, makes permanent magnet 22 can not be thrown out of disengaging when motor rotates.

Claims

1. brushless direct-current permanent magnet motor, comprise a housing, pass the main shaft of housing and be arranged at housing interior stator, rotor and commutator, rotor is made up of iron core and permanent magnet and is connected on the main shaft, it is characterized in that: the outer wall of described iron core is provided with the complex root rib of projection, extend to both sides and form the T font in the rib upper end, described permanent magnet is stuck between two adjacent ribs.

2. brushless direct-current permanent magnet motor according to claim 1 is characterized in that: described rib vertically is distributed on the outer wall of iron core.

3. brushless direct-current permanent magnet motor according to claim 2 is characterized in that: described rib has 2 to 8.

4. according to claim 1 or 3 described brushless direct-current permanent magnet motors, it is characterized in that: described iron core is cylinder, middle hollow out.

5. brushless direct-current permanent magnet motor according to claim 4 is characterized in that: described permanent magnet material is a neodymium iron boron.