Motor wheel for drive of vehicles

FIELD: engines and pumps.

SUBSTANCE: multi-pole synchronous electric motor with excitation from permanent magnets comprises a stator with even number of poles 2p, on the poles there is a winding made of one coil per pole, a salient-pole rotor with even number of poles, permanent magnets with tangential magnetisation are located on the rotor radially between poles, the salient-pole rotor with tangential magnetisation of poles is made with number of poles equal to the number of poles on the stator, and equal pitch between poles, pole tips of identical poles on the stator differ in their width from width of poles of the opposite polarity.

EFFECT: simplified design.

1 dwg

 

The technical field to which the invention relates.

The invention relates to electrical engineering, namely, electric motors for drive-wheel motor vehicles with a simultaneous reduction of speed.

The level of technology

Known multi-pole motors for the drive-wheel motor vehicles with a simultaneous reduction of the rotation frequency of the magnetic field containing the stator 2P salient poles with windings in the form of a coil on each pole, the rotor is placed on the poles of the permanent magnets with an even number of poles that differ by an even number of poles on the stator [1]. Working magnetic flux generated by the windings of the stator of this motor is closed through air gaps between the stator poles and rotor, radially spaced permanent magnets, which leads to less efficient use of the energy of the working magnetic flux. Because the conductivity of the permanent magnet is equal to the conductivity of the air gap, a significant part of the magnetomotive forces of the windings of the stator is spent on overcoming the magnetic resistance of the section of magnetic circuit with permanent magnets and the air gap.

Also known multipolar synchronous electric motor with excitation from permanent magnets, with an even number field, the s 2P on the stator, at the poles placed winding consisting of a single coil on the pole, salient-pole rotor with an even number of poles different from the number of poles on the stator on an even number. Permanent magnets with tangential magnetization are located on the rotor radially between the poles [2]. In creating the rotating moment in these engines simultaneously participate 2/3 of the total number of poles. To bring the rotation of the rotor of the electric motor in the design of the motor, you must have the sensor rotor position.

Similar multi-pole motors with excitation from permanent magnets on the stator with an even number of poles 2P, at the poles placed winding consisting of a single coil on the pole, salient-pole rotor with a posted permanent magnets with tangential magnetization with an even number of poles different from the number of poles on the stator on an even number, managed from the inverter described in [3 and 4]. In these motors torque also create no more than 2/3 of the total number of poles. In addition, to obtain a torque on the rotor, you must have the sensor position of the rotor relative to the stator poles.

The invention

The most close, essentially, the present invention is a multi-pole synchronous electrodes the tel with excitation from permanent magnets, on the stator with an even number of poles 2P, at the poles placed winding consisting of a single coil on the pole, salient-pole rotor with an even number of poles different from the number of poles on the stator on an even number. Permanent magnets with tangential magnetization are located on the rotor radially between the poles. To bring the rotation of the rotor of the electric motor in the design of the motor, you must have the sensor rotor position.

The aim of the invention is to increase the torque and to simplify the design of the motor.

Goal to increase the torque of the motor is achieved by the fact that salient-pole rotor with tangential magnetization of the poles made a number of poles equal to the number of poles on the stator, and equal spacing between poles, pole pieces like poles on the stator differ in their width from the width of the poles of the opposite polarity. This leads to the increase of simultaneously operating poles when creating torque, therefore, increase the torque of the rotor under other equal conditions with the prototype.

The goal of simplifying the design of the motor is achieved by the fact that to create a torque of the rotor of the electric motor simultaneously excited all the poles of the stator, and in alternating what I order. For continuous rotation of the rotor it is necessary to periodically change the polarity of the stator poles, i.e., to change the direction of the current in the coils of the stator winding. This is possible with the power of stator windings of an alternating current or a sequence of pulses of direct current of alternating polarity. Thus, there is no information about the position of the rotor relative to the stator poles, i.e., the position sensor rotor. This leads to simplification of the structure of the motor.

List of figures, drawings and other materials

The drawing shows a longitudinal section of the active part of the proposed motor.

Information confirming the possibility of carrying out the invention

The proposed motor (see drawing) contains the outer pole with an even number of poles of the cylindrical rotor housing 1 of a nonmagnetic material, the magnetic core 3 of the electrical steel or other magnetic material and the permanent magnet excitation system 2 tangential bias, placed between oppositely charged poles of the rotor. The stator is located inside the rotor concentric with and consists of a magnetic circuit of the electrical steel or other magnetic material 5 contains an equal number of salient poles of the rotor. At the poles of the stator hosted exchange rate is TKA stator 4 - one coil on the pole.

The electric motor operates as follows. The magnetic flux of permanent magnets is closed through the air gap between the stator and rotor magnetic circuit formed by the salient poles of the rotor and the stator, and the back of the magnetic rotor. Magnetic lines of force shown in the drawing. denoted by fPM. Under the action of magnetic forces of attraction of the rotor occupies the position shown in the drawing, a pair of poles N-S and a pair of poles on the stator have the same step. Thus, the rotor develops a certain braking torque. The rotor is set in motion when connecting the stator winding so that the coils on the poles of the stator, a magnetic field opposing the magnetic field of permanent magnets polarity, as shown in the drawing. The lines of force of this field is denoted by farticle. Thus the interaction of two magnetic fields causes a repulsive same field strength. Because of the magnetic asymmetry of the opposite poles this force has directed action. In the form shown in the drawing, if the force is directed clockwise. Created named forces torque causes the rotor to a rotary motion. Rotor poles change its position by moving one pole division. When powered stator winding by an alternating current or a pulse sequence is lsow DC variable polarity current in the windings of the stator changes its direction. Pole stator change its polarity and between the poles of the stator and rotor resurface repulsive forces prior to their move to one pole division. Thus formed electromagnetic torque acting on the rotor. When this occurs the reduction of the speed of rotation of the rotor: when changing the polarity of the magnetic field, the rotor is rotated one pole division. For complete rotation of the rotor it is necessary to change the polarity of the magnetic field of the stator is equal to the number of stator poles times.

Compared with other engines in the proposed all-pole rotor and stator act simultaneously and coherently, i.e., act in the same direction. This leads to the increase of the torque of the rotor.

In the proposed motor there is no need for information about the position of the rotor relative to the poles of the stator winding, as is customary when powered from the inverter. This leads to simplification of the structure of the motor.

Literature.

1. Optimization design of low-speed brushless motor with two coils to drive the motor-wheel. J. "Electrical engineering", No. 12, 1999, pp. 6-13.

2. Multi-pole synchronous machine with fractional q<1 subcommi windings with excitation from permanent magnets. J. "Electrical engineering", No. 9, 2007, page 3-8.

3. RF patent №2181091. B 2002, No. 10.

4. RF patent №2278797. B 2006, No. 18.

Multi-pole synchronous motor with excitation from permanent magnets on the stator with an even number of poles 2P, at the poles placed winding consisting of a single coil on the pole, salient-pole rotor with an even number of poles, permanent magnets with tangential magnetization are located on the rotor radially between the poles, wherein the salient-pole rotor with tangential magnetization of the poles are made with a number of poles equal to the number of poles on the stator, and equal spacing between poles, pole pieces like poles on the stator different in width from the width of the poles of the opposite polarity.



 

Same patents:

FIELD: electricity.

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4 cl, 3 dwg

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Borehole motor // 2516472

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FIELD: electricity.

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8 cl, 4 dwg

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3 dwg

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3 cl, 2 dwg

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5 cl, 3 dwg

FIELD: electric engineering and electric-mechanical engineering, in particular, engineering of synchronous generators with excitation by permanent magnets.

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6 cl, 3 dwg

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11 cl, 7 dwg

Electric machine // 2306657

FIELD: electric engineering, in particular - electric machines and electric drive.

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4 dwg

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3 cl, 2 dwg

FIELD: electric engineering, namely - electric machines with magnetic systems on constant magnets, possible use in compact power plants, electric propelling system motors of sea vessels, submarines with unique vibration-noise characteristics, compact constant current energy systems.

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EFFECT: creation, for sea vessels and submarines, of a nominal row of electro-mechanical transformers with specific power for a unit of volume and weight being several times higher compared to existing ones, with small axial length, dimensions and weight, with weak reaction of magnetic system to load current and with rigid proportionality of torque to load current, and also with low pulsations of torque in terms of rotor rotation angle, making it possible to ensure unique vibration-noise characteristics of submarines.

10 cl, 5 dwg

FIELD: electrical engineering; electrical machines such as low-speed high-torque wheel motors for driving vehicles, elevators, for use as motor-car starting generators and low-speed generators for wind-electric and dam-free hydroelectric power plants, and the like.

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8 cl, 2 dwg, 1 tbl

FIELD: electrical engineering; electrical machines that can be used as direct- or alternating-current motors and/or generators for industry and domestic appliances.

SUBSTANCE: proposed electrical machine of first design alternate has frame; power supply; magnetic inductor with shaft-mounted commutator and two shaft-mounted armatures provided with commutators and brushes and disposed coaxially in tandem; armatures are mounted in opposition at butt-ends of magnetic inductor; the latter is cylindrical in shape made in the form of alternating reverse-polarity permanent magnets and electromagnets with their poles facing the armatures. Electrical machine of second design alternate has frame; power supply; coaxially disposed magnetic inductor with commutator and armature with commutator and brushes around the latter, all mounted on their respective shafts; magnetic inductor is made in the form of alternating reverse-polarity permanent magnets and electromagnets abutting against each other , their poles facing the armature. Electrical machine of third design alternate has frame; power supply; magnetic inductor with commutator and armature with commutator and brushes coaxially disposed on their respective shafts; armature is mounted around magnetic inductor; the latter is assembled of two parts abutting against one another; one of these parts is built of one or more reverse-polarity permanent magnets and other one, of one or more reverse-polarity electromagnets, permanent-magnet and electromagnet poles facing the armature. Electrical machine of fourth design alternate has frame; power supply; magnetic inductor with commutator and two armatures with commutators and brushes, all mounted on their respective shafts; armatures are disposed in opposition on butt-ends of magnetic inductor; the latter is assembled of two parts abutting against one another; one of them is made of reverse-polarity permanent magnets and other part, of reverse-polarity electromagnets; permanent-magnet and electromagnet poles are facing respective armatures.

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25 cl, 10 dwg

FIELD: electric engineering, specific features of realization of motors with constant magnets on rotor.

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EFFECT: usage of claimed highly efficient motor with constant magnets ensures reduction of reactive flow of anchor, improvement of magnetic flow distribution in external core, and, therefore, reduced noise and vibration.

6 cl, 11 dwg

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