CN103887947A

CN103887947A - Built-in tangential permanent magnet steel hub driving motor of electric vehicle

Info

Publication number: CN103887947A
Application number: CN201410140664.8A
Authority: CN
Inventors: 张学义; 杜钦君; 马清芝; 高松; 尤迪
Original assignee: Shandong University of Technology
Current assignee: Shandong University of Technology
Priority date: 2014-04-10
Filing date: 2014-04-10
Publication date: 2014-06-25

Abstract

The invention provides a built-in tangential permanent magnet steel hub driving motor of an electric vehicle and belongs to the technical field of automobile motor electric appliances. The built-in tangential permanent magnet steel hub driving motor of the electric vehicle consists of a shaft, a front end cover, a rear end cover, a hub casing, a rotor, a stator and a stator support. A first piece of rectangular permanent magnet steel and the other piece of rectangular permanent magnet steel are sequentially installed in radial rectangular grooves of a rotor iron core in a mode that an N-pole of the first piece of rectangular permanent magnet steel is opposite to an N-pole of the other piece of rectangular permanent magnet steel, and an S-pole of the first piece of rectangular permanent magnet steel is opposite to an S-pole of the other piece of rectangular permanent magnet steel, a tangential permanent magnet rotor with N-poles and S-poles arranged at intervals is formed, the structure is a rotor magnetic bypass structure and can effectively prevent the permanent magnet steel from producing irreversible demagnetization under the armature reaction effect of impact current, and excitation loss of the permanent magnet steel is ensured. A rotor magnetic field of the hub driving motor is provided by the permanent magnet steel without electro-magnetic windings, electric energy consumption is low, carbon brushes and mechanical commutators are not adopted, the failure rate is low, and the built-in tangential permanent magnet steel hub driving motor has high-efficiency, high-power-density and remarkable magnetic focusing effect and can provided enough power for the electric vehicle.

Description

The embedded tangential permanent magnet steel wheel hub of electric automobile drive motors

Technical field

The invention provides the embedded tangential permanent magnet steel wheel hub of a kind of electric automobile drive motors, belong to electric motor of automobile technical field of electric appliances.

Background technology

Current and the matching used drive motors of electric automobile mostly adopts the direct current machine with carbon brush and mechanical commutator, although DC motor structure is simple, controllability is high, speed-regulating range width, control circuit is relatively simple, cost is lower, but because the magnetic field of direct-drive motor is produced by electric excitation winding, power consumption is many, power output is little, in addition owing to having carbon brush and mechanical commutator, not only limit the raising of drive motors overload capacity and speed, if long-play, often maintenance be certainly will need and carbon brush and commutator changed, therefore direct current machine energy consumption is large, failure rate is high, its serviceability needs further improvement.

Summary of the invention

The object of this invention is to provide one and can overcome above-mentioned defect, the magnetic field of drive motors is provided by permanent-magnet steel, few without electric excitation winding, power consumption, there is no the embedded tangential permanent magnet steel wheel hub of the electric automobile drive motors of carbon brush and mechanical commutator, failure rate is low, its technology contents is:

The embedded tangential permanent magnet steel wheel hub of the electric automobile drive motors being made up of axle, front end housing, rear end cap, hub-type casing, rotor, stator, stator support, is characterized in that: hub driven motor rotor is the p-m rotor of embedded tangential permanent magnet steel;

The p-m rotor of embedded tangential permanent magnet steel is by rotor core, rectangle permanent-magnet steel, hub-type casing composition, on rotor core, be evenly equipped with the radially rectangular channel that even number runs through rotor core thickness, radially between the inner of rectangular channel and the inner circle of rotor core, be not communicated with, the distance of connected component is not 1.5mm, adjacent two radially between the outer end of rectangular channel, be provided with run through rotor core thickness be shaped as tangential rectangular channel every magnetic air gap, multiple tangential rectangular channels all tangent with same circumference every magnetic air gap, and be not communicated with rectangular channel radially, the distance of connected component is not 1.5mm, minimum range between outer end every magnetic air gap and the rotor core cylindrical of tangential rectangular channel is 3mm, the mode that the N utmost point of first block of rectangle permanent-magnet steel is extremely relative with the N of adjacent another piece rectangle permanent-magnet steel, and the mode that the S utmost point of first block of rectangle permanent-magnet steel is extremely relative with the S of adjacent another piece rectangle permanent-magnet steel is arranged in the radially rectangular channel of rotor core successively, the like, rotor core is fixed on the inner side of hub-type casing.

operation principle:when permanent magnetism hub driven motor passes into by three-phase inverter after the three-phase alternating current of pulse-width modulation, hub driven motor stator produces a space rotating magnetic field, the magnetic field interaction that it and rotor permanent magnet steel produce, rotor produces the rotating torques consistent with stator winding rotating magnetic field direction, hub driven motor p-m rotor is rotated, and then drive electric automobile operation.

The present invention compared with prior art, tangential magnetic field permanent-magnet steel is embedded in rotor core, this structure is rotor magnetic bypass structure, can effectively prevent that permanent-magnet steel from producing the problem of irreversible demagnetization under the armature reaction effect of impulse current, guarantee not loss of excitation of permanent-magnet steel, the rotor field of hub driven motor is provided by permanent-magnet steel, few without electric excitation winding, power consumption, there is no carbon brush and mechanical commutator, failure rate is low, there is high efficiency, high power density and significant magnet accumulating cap, can provide enough large power for electric automobile.

Accompanying drawing explanation

Fig. 1 is the structural representation of the embodiment of the present invention.

Fig. 2 is profile embodiment illustrated in fig. 1.

In figure: 1, axle 2, front end housing 3, hub-type casing 4, rectangle permanent-magnet steel 5, rotor core 6, stator 7, stator support 8, rear end cap 9, every magnetic air gap.

Embodiment

Below in conjunction with accompanying drawing, the invention will be further described:

The embedded tangential permanent magnet steel wheel hub of the electric automobile drive motors being made up of axle 1, front end housing 2, rear end cap 8, hub-type casing 3, rotor, stator 6, stator support 7, is characterized in that: hub driven motor rotor is the p-m rotor of embedded tangential permanent magnet steel;

The p-m rotor of embedded tangential permanent magnet steel is by rotor core 5, rectangle permanent-magnet steel 4, hub-type casing 3 forms, on rotor core 5, be evenly equipped with the radially rectangular channel that even number runs through rotor core 5 thickness, radially between the inner of rectangular channel and the inner circle of rotor core 5, be not communicated with, the distance of connected component is not 1.5mm, adjacent two radially between the outer end of rectangular channel, be provided with run through rotor core 5 thickness be shaped as tangential rectangular channel every magnetic air gap 9, multiple tangential rectangular channels all tangent with same circumference every magnetic air gap 9, and be not communicated with rectangular channel radially, the distance of connected component is not 1.5mm, minimum range between outer end every magnetic air gap 9 and rotor core 5 cylindricals of tangential rectangular channel is 3mm, the mode that the N utmost point of first block of rectangle permanent-magnet steel 4 is extremely relative with the N of adjacent another piece rectangle permanent-magnet steel 4, and the mode that the S utmost point of first block of rectangle permanent-magnet steel 4 is extremely relative with the S of adjacent another piece rectangle permanent-magnet steel 4 is arranged in the radially rectangular channel of rotor core 5 successively, the like, rotor core 5 is fixed on the inner side of hub-type casing 3.

Claims

1. the embedded tangential permanent magnet steel wheel hub of an electric automobile drive motors, formed by axle (1), front end housing (2), rear end cap (8), hub-type casing (3), rotor, stator (6), stator support (7), it is characterized in that: hub driven motor rotor is the p-m rotor of embedded tangential permanent magnet steel;

The p-m rotor of embedded tangential permanent magnet steel is by rotor core (5), rectangle permanent-magnet steel (4), hub-type casing (3) composition, on rotor core (5), be evenly equipped with the radially rectangular channel that even number runs through rotor core (5) thickness, radially between the inner circle of the inner of rectangular channel and rotor core (5), be not communicated with, the distance of connected component is not 1.5mm, adjacent two radially between the outer end of rectangular channel, be provided with run through rotor core (5) thickness be shaped as tangential rectangular channel every magnetic air gap (9), multiple tangential rectangular channels all tangent with same circumference every magnetic air gap (9), and be not communicated with rectangular channel radially, the distance of connected component is not 1.5mm, minimum range between outer end every magnetic air gap (9) and rotor core (5) cylindrical of tangential rectangular channel is 3mm, the mode that the N utmost point of first block of rectangle permanent-magnet steel (4) is extremely relative with the N of adjacent another piece rectangle permanent-magnet steel (4), and the mode that the S utmost point of first block of rectangle permanent-magnet steel (4) is extremely relative with the S of adjacent another piece rectangle permanent-magnet steel (4) is arranged in the radially rectangular channel of rotor core (5) successively, the like, rotor core (5) is fixed on the inner side of hub-type casing (3).