Electric machine

 

The invention relates to the field of electrical engineering, in particular to electrical machines and drives. The invention consists in the following. An electric machine includes a rotor of magnetic conductive material and a stator, in which the magnetic core is made of conductive rings and the longitudinal ends of the strips, the armature winding is made of a ring on the number of phases, distributed in the axial direction and placed between two adjacent conductive rings, while the angular position of the teeth conductive rings of different phases can be distinguished on the corner 2/m El. radians, where m is the number of phases on the motor rotor mounted permanent magnets with the polarity alternating in the tangential direction, the number of teeth on the annular magnetic stator is made twice the smaller number of poles of the rotor and the teeth of the annular magnetic circuit, between which is placed an annular winding is shifted by an angle an angle equal to the angular width of the rotor poles. The technical result is an increase in torque and power output shaft, increased efficiency, and reduced weight and size. 2 C.p. f-crystals, 6 ill.

Closest to the proposed car multiphase induction machine (U.S. Pat. Of the Russian Federation No. 2037940, BI No. 17, 1995), containing the rotor of the conductive material with the teeth on the surface, passing in the axial direction, and a stator, in which the magnetic core is made of conductive rings and the longitudinal ends of the strips. Armature winding is made of a ring on the number of phases, distributed in the axial direction and placed between two adjacent conductive rings. The number of teeth on the rotor and on each of the annular magnetic circuit of the stator in the same way. The angular position of the teeth of the two conductive rings located on the sides of each of the phases are the same and the angular position of the conductive rings of different phases can be distinguished on the corner 2/m radians, where m is the number of phases.

The present invention will create a motor with high torque and power output shaft of the machine, efficiency, and with less weight and size.

This is achieved by the fact that poverhnosti. The number of teeth on the conductive rings of the stator is two times less than the number of rotor poles and the teeth of the two ring cores, between which is placed an annular winding of one phase shifted in angular coordinates by an angle equal to the angular width of the rotor poles. Ring winding of each phase is divided into two or more annular sections disposed between adjacent annular magnetic circuit, the number of annular magnetic phases is greater by one than the number of annular sections of the phase, while the angular position of the teeth on the odd-numbered and even-numbered annular magnetic cores of this phase differs by an angle equal to the angular width of the rotor poles. Packages longitudinal magnetic trailing magnetic ring cores, divided by the number of parts equal to the number of phases, and installed so that each of the packages longitudinal magnetic circuits connected annular magnetic cores, only one phase. The motor housing is made of a nonmagnetic material.

Placement on the rotor permanent magnets and offset teeth of the annular magnetic circuit of one phase by an angle equal to the angular width of the rotor poles, increases the torque, power and efficiency of the machine as an electric machine with an active rotor there is a few sections, placed between the annular magnetic circuit, the number of which is greater by one than the number of sections phase, reduces the magnetic flows in the axial direction, and can reduce the cross-section packages longitudinal magnetic circuit, thus reducing the weight and dimensions of the machine. Separation packages longitudinal magnetic trailing magnetic ring cores, the number of parts equal to the number of phases and the execution of the motor housing of non-magnetic material reduces stray magnetic fluxes of the engine, and, consequently, to increase the torque, power and efficiency of the electric machine, and to reduce the weight and dimensions.

In Fig.1 shows an axial section of the proposed engine. In Fig.2 and Fig.3 - a few Diametric sections of the engine. In Fig.4 is an axial section of the engine is divided into sections phases. In Fig.5 is a part axial section of the engine is divided into sections phases in an enlarged scale. In Fig.6 is an axial section of a motor with split packages longitudinal magnetic circuit of the stator.

In depicted in Fig.1 the engine body 1 is placed a steel rotor 2 mounted on a shaft 3 mounted in bearings 4. The magnetic field of the rotor 2 create permanent magnets is I in Fig.1-3, alternates on the angular coordinate, see for example the design of the engine on the rotor 2 are six permanent magnets 5. In case 1, the engine still has a stator consisting of an annular magnetic circuits 6, 7, 8, 9, 10 and 11, recruited from separate plates. Between the pairs of annular magnetic cores, 6-7, 8-9, 10-11 has three annular windings 12, 13 and 14, which are the phases of the stator. For closing the magnetic flux passing through the ring cores 6, 7, 8, 9, 10 and 11, the body 1 is installed packages cores 15, recruited from the plate and held in axial direction.

The annular magnetic circuits 6, 7, 8, 9, 10 and 11 in the inner cavity have teeth 16 (Fig.2 and 3), passing in the axial direction. The angular width of the teeth 16 is approximately equal to the angular width of the pole 5 of the rotor 2, and the number of teeth 16 on each annular magnetic core 6, 7, 8, 9, 10 and 11 in two times less than the number of poles 5 of the rotor 2. The teeth 16 in each of the pairs of annular magnetic cores 6 and 7, 8 and 9, 10 and 11 are shifted in angular coordinates by an angle equal to the angular width of the pole 5. A pair of annular magnetic cores 6 and 7, 8 and 9, 10 and 11, between which is placed an annular windings 12, 13 and 14, mounted in the housing 1 so that their teeth are offset by an angle relative to druginformation phases shifted by one third of the pole division.

We offer electric machine operates as follows. Let is current conditional positive direction in the winding 12 and the windings 13 and 14 is de-energized. The magnetic flux f (shown in Fig.1 and 2 by dashed lines) generated by coil 12, will be held in the radial direction through the annular magnetic core 6 in the axial direction through the packs of laminations 15, again in the radial direction through the annular magnetic core 7 double-crosses the air gap between the rotor 2 and the stator and finally through the rotor. Let the positive direction of the current in the winding 12, the teeth 16 of the magnetic circuit 6 will have a South polarity, and the teeth 16 of the magnetic core 7 - North polarity. Then under the action of electromagnetic torque, the rotor will be set in the position shown in Fig.2, in which the magnetic flux of the rotor 2 and the magnetic flux created by the winding 12 will be directed according. While the North poles of the rotor 2 will be the same angle with the teeth 16 of annular magnetic core 6 (Fig.2,a), and the South poles of the rotor 2 will coincide with the teeth 16 of the ring of the magnetic circuit 7 (Fig.2). The location of the teeth 16 of the other annular magnetic circuits 8, 9, 10 and 11 in this position of the rotor 2 relative to the pole 5 of the rotor 2 the second phase is closed through the annular magnetic cores 8 and 9, thus, the teeth of the ring 16 of the magnetic circuit 8 will have a South polarity, and the teeth 16 of the magnetic circuit 9 North polarity. Arise electromagnetic torque, unwrapping the rotor 2 so that the magnetic fluxes of the winding 13 and the rotor 2 coincided in direction. The rotor 2 will be forced to develop at an angle 2/m El. radians counterclockwise. The North poles of the rotor 2 will be the same angle with the teeth 16 of annular magnetic core 8 and South poles of the rotor 2 will coincide with the teeth 16 of the ring magnet 9.

If a positive current will flow in the winding 14 and the windings 12 and 13 are turned off, the magnetic flux will pass through the annular magnetic cores 10 and 11, and the rotor 2 will unfold another angle 2/m El. radians counterclockwise.

Then again, you should enable the winding 12, the rotor 2 will unfold one step, etc. For changing the direction of rotation you want to change the order of the switching phases of the motor on the back. In accordance with the above description the engine is running in step mode with alternate switching phases. For engine management, you can use other switching system, for example, by applying to phase them different is rder="0">/m, the motor will operate as a synchronous - uniform rotation of the rotor and the shaft.

When to commutate the motor phase signals of the sensor rotor position, the motor will operate as a contactless DC motor.

We offer electric machine can also be used in generator mode.

In the proposed electric car changing the design of the magnetic circuit of the stator is allowed to set on the rotor permanent magnets. As is known, the electric machine with permanent magnets with the same dimensions have more torque, power and efficiency than induction motors, because the rotor has its own magnetic field.

Weight and dimensions of the proposed motor can be reduced by reducing the cross-section packages longitudinal magnetic core 15. In Fig.4 shows an axial section of the proposed electric machine, in which each phase is divided into several sections (Fig.4, each phase is divided into three sections). In Fig.5 shows an enlarged fragment design electrical machines, highlighted in Fig.4 by the dashed line. The number of annular magnetic circuit of one phase must be one greater than the number of partitions of the phase. For example, the first phase of the composition are connected in parallel or in series, but so that the sign of the magnetizing forces of sections 17, 18 and 19 were followed in the axial direction. The direction of the magnetizing forces of sections 17, 18 and 19 shown in Fig.5 in the selected circles. The angular position of the teeth 16 on even 20 and 22 and odd 21 and 23 of annular magnetic cores of this phase differs by an angle equal to the angular width of the rotor poles. That is, the teeth 16 of the ring cores 20 and 22 should be located as well as the teeth 16 of annular magnetic core 6 (Fig.2,a), and the teeth 16 of the ring cores 21 and 23 must be located as well as the teeth 16 of the ring of the magnetic circuit 7 (Fig.2).

The winding ring and the magnetic circuits of the second and third phases are executed in a similar manner, with the annular magnetic circuits of the second and third phases shifted by angle relative to the annular magnetic circuits of the first phase by the angle 2/m El. radians.

If the first phase of its sections 17, 18 and 19 to generate multiple magnetic fluxes f (Fig.5) passing through the annular magnetic circuits 20, 21, 22 and 23 and the packets of laminations 15. Under the action of electromagnetic torque, the rotor will rotate to the position where the magnetic phase and the permanent magnets of the rotor will be directed according. This relatively zu the 6 ring cores 21 and 23 of the rotor 2 will be located, as shown in Fig.2,century

When switching phases of the motor shown in Fig.5, the motor will operate similar to the engine shown in Fig.1.

Compared with the prototype and the engine depicted in Fig.1, in the engine shown in Fig.5, the magnetic flux of each phase is divided into multiple threads, the number of which equals the number of partitions of phases, in this example, three threads. Therefore, the magnetic flux passing through any cross-section of the packet of laminations 15, reduced three times. Hence, the cross section of the packet of laminations 15 in the proposed engine compared to the prototype it is possible to reduce the number of times equal to the number of sections phases, reducing the weight and dimensions of the engine.

In the proposed design of the engine (Fig.1 and 4) enabling each phase occur stray magnetic fluxes, reducing engine torque. For example, if the winding 12 of the motor shown in Fig.1, and turned off the windings 13 and 14, the magnetic flux created by the winding 12 will take place not only through the annular magnetic core 7, but other annular magnetic circuits 8, 9, 10 and 11, located to the right of the winding 12 in Fig.1. As if to neglect the magnetic potential drop in mahnaimi the magnetic circuit 7, 8, 9, 10 and 11, will be the same. To eliminate stray magnetic flux and increase of the engine torque packets of the magnetic circuit 15 should be divided into a number of parts equal to the number of phases m so that each of the packets of the cores 24, 25 and 26 closed magnetic flux of only one phase, as shown in Fig.6. The housing 1 of the motor must be made of nonmagnetic material. Reducing stray magnetic flux will increase the torque and power of the proposed engine.

Claims

1. Electrical machine containing the rotor of the conductive material and the stator, in which the magnetic core is made of conductive rings and the longitudinal ends of the strips, the armature winding is made of a ring on the number of phases, distributed in the axial direction and placed between two adjacent conductive rings, while the angular position of the teeth conductive rings of different phases can be distinguished on the corner 2/m El.rad., where m is the number of phases, wherein the motor rotor mounted permanent magnets with the polarity alternating in the tangential direction, the number of teeth on the annular magnetic stator made the first winding, offset angle by an angle equal to the angular width of the rotor poles.

2. Electric machine under item 1, characterized in that each phase is divided into several sections with different signs magnetizing force is located between the annular magnetic circuit, the number of which is greater by one than the number of sections of the phase, while the angular position of the teeth on the even-numbered and odd-numbered annular magnetic cores of this phase differs by an angle equal to the angular width of the rotor poles.

3. Electric machine under item 1 or 2, characterized in that the packages longitudinal magnetic trailing magnetic ring cores, divided by the number of parts equal to the number of phases, and installed so that each of the packages longitudinal magnetic circuits connected annular magnetic only one phase, and the motor housing is made of a nonmagnetic material.



 

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