CN201041960Y - Doubly Salient Permanent Magnet Hub Motor - Google Patents

Abstract

The utility model discloses a double-salient-pole permanent-magnet hub electric motor. The electric motor essentially consists of a stator and a rotor. The stator and the rotor take a double-salient-pole shape. A permanent magnet is arranged on the stator or on the rotor, a concentrated winding is arranged on the stator, and the rotor is integrated with the hub. The stator is fixed on a bracket through the support from a bearing arranged on an axis, and the bracket is fixed with the axis through a screw. The hub electric motor has compact structure, high power density, wide speed-regulating range, reliable and stable operation, easy dismounting and maintenance as well as excellent controllability.

Description

Doubly Salient Permanent Magnet Hub Motor

technical field

The utility model relates to a permanent magnet hub motor, in particular to a double salient pole permanent magnet hub motor.

Background technique

At present, the in-wheel motors used in electric vehicles include DC motors, induction motors, permanent magnet brushless DC motors, and switched reluctance motors. DC motors are expensive, large in size and weight, and have poor reliability due to easy wear and tear of components such as brushes and mechanical commutators. Induction motors need to use large-capacity frequency conversion and voltage conversion devices, and the speed regulation is also poor. The cost of the control system of the induction motor is much higher than the motor itself. The permanent magnet brushless DC motor is affected and limited by the permanent magnet material process, and the power density is small. The biggest feature of switched reluctance motor (SR) is its high reliability, very simple motor structure and wide speed range. However, from the viewpoint of energy conversion, the efficiency of the SR motor is not high, and the noise and torque ripple are high.

In view of the deficiencies of the above-mentioned motors, the Guangdong Provincial Natural Science Foundation approved a project (05006516) for double salient pole permanent magnet hub motors in 2005, and the utility model was completed under the funding of this project.

Utility model content

The purpose of this utility model is to provide a double-salient pole permanent magnet wheel hub motor suitable for electric vehicles, which can not only be directly installed on the wheel shaft, but also can be easily installed and disassembled, and has a simple structure. , high efficiency and good speed regulation performance.

The double-salient pole permanent magnet hub motor of the utility model is mainly composed of a stator and a rotor. Both the stator and the rotor are double-salient pole structures. The multi-phase concentrated windings are symmetrically distributed on the inner stator poles, and the yoke of the stator is symmetrical. distributed permanent magnets.

The stator is fixed on the bracket, the bracket is connected with the shaft, the stator and the rotor are concentric with the shaft, the rotor and the hub are integrated, supported by bearings, and the permanent magnet is placed on the yoke of the rotor.

In a specific application, the axial length of the hub motor matches the axial length of the rear wheel of the automobile; the outer rotor of the motor and the hub are assembled together in a tight fit; the entire motor is disc-shaped, short and thick. The concentrated armature windings wound on the salient poles of the stator, the radially opposite pole windings are connected in series as one phase, and the permanent magnets are symmetrically inserted in the stator yoke.

The utility model has the advantages that the entire motor has a compact structure, and the external dimensions of the motor coincide with the inner cavity of the wheel rim at the drive wheel of the automobile, thereby effectively utilizing the space. The force on the working face of the fixed bearing is reasonable. The loading mode of the wheel hub is similar to that of a traditional car, and the operation is reliable. The permanent magnets and windings are placed on the stator to ensure the mechanical strength and stability of the rotor at high speed. The parts of the motor are easy to disassemble and easy to maintain.

Description of drawings

Fig. 1 is a schematic diagram of the structure of the double salient pole permanent magnet hub motor of the present invention. In the figure: shaft 1, wheel hub 2, bracket 3, bearing 4, rotor 5, stator 6.

Fig. 2 is a schematic diagram of stator and rotor stampings of the double salient pole permanent magnet hub motor of the present invention. In the figure: rotor 5, stator 6, coil winding 7, permanent magnet 8.

specific implementation plan

Below in conjunction with accompanying drawing, the utility model is further described.

As shown in Figures 1 and 2, in the double-salient pole permanent magnet hub motor of the present invention, the stator 6 and the rotor 5 are double-salient pole structures, and the multi-phase concentrated coil windings 7 are symmetrically distributed on the inner stator poles. 6 The permanent magnets 8 are symmetrically distributed on the yoke.

The stator 6 is fixed on the bracket 3, the bracket 3 is connected with the shaft 1, the stator 6 and the rotor 5 are concentric with the shaft 1, the rotor 5 and the hub 2 are integrated, supported by the bearing 4, and the permanent magnet 8 is placed on the yoke of the rotor 5 .

In Fig. 1, the shaft 1 is a stepped shaft made of alloy steel, the hub 2 and the bracket 3 are cast from aluminum alloy, and the bearing 4 is a pair of single-row deep groove ball bearings. Shaft 1 and bracket 3 are fixed by screws. The stator 6 and the bracket 3 are fixed by axial through-hole screws. The rotor 5 and the hub 2 are integrated by a tight fit method, and rotate around the shaft 1 through the bearing 4 . The hub 2 is fixed to the rim by screws, and the shaft 1 is fixed to the vehicle frame.

In Fig. 2, the stator 6 and the rotor 5 are formed by laminating silicon steel sheets.

Claims (3)

1. A double-salient pole permanent magnet wheel hub motor, mainly composed of a stator and a rotor, is characterized in that: the stator and the rotor are double-salient pole structures, and multi-phase concentrated windings are symmetrically distributed on the inner stator poles, and the stator yoke The permanent magnets are distributed symmetrically. 2. The in-wheel motor according to claim 1, characterized in that: the stator is fixed on the bracket, the bracket is connected with the shaft, the stator and the rotor are concentric with the shaft, and the rotor and the hub are integrated and supported by bearings. 3. The in-wheel motor according to claim 1 or 2, characterized in that the permanent magnet is placed on the rotor yoke.

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