CN2276687Y

CN2276687Y - Rare earth permanent magnet outer rotor wheeled electrical machinery

Info

Publication number: CN2276687Y
Application number: CN 96233949
Authority: CN
Inventors: 曾怀谋; 甘顺铃
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-10-28
Filing date: 1996-10-28
Publication date: 1998-03-18
Anticipated expiration: 2006-10-28

Abstract

The utility model relates to a wheel type electrical machine with an outer rotor made of rare earth permanent magnets. The utility model is characterized in that a rotor is composed of two sets of permanent magnets 2 sintered by rare earth and Nd-Fe-B, and the permanent magnets 2 are distributed intensively and symmetrically and are fixed on the inner side of a casing body 1; a stator is composed of windings 3 fixed on a shaft 4; the lateral panel 7 of the rotor is connected with the shaft 4 through a bearing 5 and rotates around the shaft; the rotor and the windings 3 keep even gaps; the flange of the casing 1 is provided with a connecting piece 6 which is tightly and fixedly connected with relevant rotary wheels along an axial direction or a radial direction; connecting lines of the windings 3 lead out electrical connection piles along the axial direction by an insulating mode, and the electrical connection piles are respectively connected with a power supply and an inverter. The utility model can be used as a generator and a drive device for electric vehicles.

Description

Rare-earth permanent magnet external rotor wheel motor

The utility model is with relevant as the synchronous motor and the generator of magnet with rare earth permanent-magnetic material.

Existing permanent magnet external rotor electric machine is the high-speed synchronous motor that utilizes the rare earth permanent-magnetic material design, includes stator and rotor two parts.Stator is positioned in the middle of the motor, is equipped with single-phase on the stator or three phase windings, and its electromagnetic structure is identical with the winding motor rotor, and the mounting flange 31 by both sides goes out terminals.Annular poles two parts that the rare earth permanent-magnetic material that bonds on shell that outside rotor is made by non magnetic steel and the inwall thereof is made constitute, and are bearing on the stator by high-speed bearing to rotate freely.Annular poles is to be formed by stacking by many magnets, along the bonding formation annular barrel of the whole casing inwall formation magnetic pole that magnetizes again.Make complexity, it is heavier to conduct oneself with dignity.Motor radiating is difficult for, and fault is more, and single direct current all made by existing permanent magnet external rotor electric machine or alternating current drives.When using as motor, a side of rotor needs driving parts such as cogged, scroll bar, drive mechanism complexity.Existing permanent magnet external rotor electric machine generally can only be made motor and use, and is more single as generator use need kit, function as need.

The purpose of this utility model provides a kind of simple in structure, and from heavy and light, failure rate is low, and diverse in function is easy to operate, and is energy-conservation, is suitable for the rare-earth permanent magnet external rotor wheel motor that motor vehicle drives.

The utility model is achieved in that

By being fixed in housing 1 inboard, concentrate the NbFeB sintered permanent magnet 2 of two group rare-earths of symmetric arrangement to constitute rotor, constitute stator by the winding 3 that is fixed on the axle 4, rotor-side panel 7 is connected with axle by bearing 5 and sways, rotor and winding 3 keep uniform gap, the flange 10 of housing 1 has connector 6 to be fastenedly connected with relevant runner vertically or radially, and winding 3 tie lines insulate vertically and draw electrical wiring, is connected with inverter with power supply respectively.

The central angle of every group of permanent magnet of the utility model 2 is 90 °-120 °, and its inside and outside cambered surface is all on the cylinder of garden.

The peripheral circuit of winding 3 of the present utility model is controlled by cpu chip.

The utility model rotor adopts the rare-earth Nd-Fe-B sintered permanent magnet to be arranged on the shell of rotation to constitute, and stator is fixed on the axle by iron core, embeds three phase windings and constitutes, and does not in servicely rotate.Both can be used as motor and used, and also can be used as generator and use.Can drive by direct current or alternating current when using as motor, diverse in function, easy to use.When winding feeds three-phase alternating current, drive the permanent magnet external rotor and rotate, be to be the motor operation.Rotating speed changes with the frequency change of alternating current.When permanent magnet external rotor during in the rotation of external force or inertia-activated, winding can be exported by special circuit with the different alternating voltages that produce different frequency of rotating speed, and at this moment, the utility model is as generator operation.When power supply is direct current (as storage battery), electric current converts three-phase alternating current to by the inverter on the circuit, and input winding then p-m rotor rotates with different rotating speeds with the different frequency of this alternating current equally; Otherwise when the rotor rotation was generated electricity, the three-phase alternating current of output is converted to direct current by rectification can send electricity to DC power supply, such as being charge in batteries.Alternating current-direct current in the special circuit exchanges, and the frequency translation and the control of the alternating current of input motor are undertaken by the cpu chip in the circuit, need only send simple instruction by keyboard and can arbitrarily operate.The utility model diverse in function, easy to operate.Rotor permanent magnet adopts rare-earth Nd-Fe-B (NaFeB) prescription sintered body, and is with two groups of symmetric arrangement, easy to manufacture, simple in structure.From heavy and light, good heat dissipation, fault is few.The motor low-speed characteristic is good, dynamic response is fast, torque fluctuations is little, and overload capacity is strong, and electric efficiency is higher than 85%, housing of the present utility model can be directly as the wheel hub of wheel, be used for vehicle traction cumbersome speed change, differential attachment are saved, Dai Ding does not have mechanical loss there not to be wearing and tearing, noiseless circuit control can be widely used in the driving of two-wheel, three-wheel, four-wheel electric vehicle.The utility model is strong as the hill climbing capacity that motor vehicle drives, when inertia traveling after running at high speed and descending, the electric current that the generator operation of motor can produce winding send to vehicle power is counter after circuit conversion, as power supply is that storage battery then forms the floating charge to battery pack, this not only can the recovery section electric energy and energy-conservation, and makes once that charging back distance travelled strengthens.

Fig. 1 is a structure chart of the present utility model.

Fig. 2 is Figure 1A-A view.

Following is embodiment of the present utility model:

Metal rigidity housing 1 both as the shell of motor, as the wheel hub of wheel, was set concentrated two symmetrical groups rare-earth Nd-Fe-B (NaFeB) permanent magnet 2 in its annular cavity garden cambered surface again.Every group of permanent magnet 2 looked the combination that the big I of power of motor is used monomer or used the polylith different volumes, but it is clean and tidy that outward appearance all should be the standard of 90 °-120 ° of center angles, lines are the arc body that flushes of title, angle, cross section all, its internal and external cambered surface should each on a complete garden cylinder.Permanent magnet is worn the bolt mode with adopting on the permanent magnet perforate being connected of shell, or the slot wedge bonding, and mode is pressed in embedding, but must be firmly.

Rotor-side panel 7 is the sealing maintenance layer of motor, also is the fixedly supporter of magnet anchor ring, or the moment driving member of rotor, must have enough strength and stiffness, can bear burn into and beat, and the face seal performance is good, and anti-cleaning.Side panel 7 is connected with axle 4 by bearing 5, constitutes around the rotation of axle 4 rotations to pay.

Winding 3 is made by the iron core and the copper cash of routine, is anchored on the surface of axle 4.Integral body is the garden post rule body of rule.Its garden cylinder keeps dynamic clearance uniformly with rare-earth permanent magnet between the garden cylinder that forms on the rotor, the winding tie lines insulate vertically and is drawn out to relevant electric pile crown, divides supplementary biography to power supply or inverter.

Sealing plate 8 is connected with housing 1 by bolt.

Claims

1, a kind of rare-earth permanent magnet external rotor wheel motor, it is characterized in that by being fixed in housing (1) inboard, concentrate the NbFeB sintered permanent magnet of two group rare-earths (2) of symmetric arrangement to constitute rotor, constitute stator by the winding (3) that is fixed on the axle (4), rotor-side panel (7) is connected with axle by bearing (5) and sways, rotor and winding (3) keep uniform gap, the flange (10) of housing (1) has connector (6) to be fastenedly connected with relevant runner vertically or radially, winding (3) tie lines insulate vertically and draws electrical wiring, is connected with inverter with power supply respectively.

2, rare-earth permanent magnet external rotor wheel motor according to claim 1, the central angle that it is characterized in that every group of permanent magnet (2) is 90 °-120 °, its inside and outside cambered surface is all on the cylinder of garden.

3, rare-earth permanent magnet external rotor wheel motor according to claim 1 and 2 is characterized in that the peripheral circuit of winding (3) is controlled by cpu chip.