TR201801413A2 - - Google Patents

Abstract

The present invention provides a stator system (2) having a stator yoke (6) and stator teeth (4) winding around it, and a rotor yoke (7), each of which is positioned at a different relative position above said rotor yoke (7). The present invention relates to an axial flux electric machine (1) comprising a rotor system (3) having a very permanent magnet (8).

Description

DESCRIPTION AXIAL WITH PERMANENT MAGNET WITH ADDITIONAL WINDING ARRANGEMENT SMART ELECTRIC MACHINE The present invention is a permanent magnet axial flux electric electric with an additional winding arrangement. relates to the machine.

Permanent magnet synchronous motors (PMSM: Permanent-magnet synchronous motor), high efficiency and without excitation winding and electronic They are switching motors. Due to its preferred properties, this engines are widely used. permanent magnet synchronous motors, according to the direction of the magnetic flux, radially, axially and transversely. are categorized. Radial flux motors, conventional motors, lamination and the most common because of their structure similar to windings and their easy production. is the type used. Axial flux motors, a different construction or insulated pure iron powder or as Soft Magnetic Composite (SMC: Soft Magnetic Composite) Because it requires the aforementioned material, it is used less.

In recent years, thanks to the developments in materials science, axial flux motors, started to be used in a wider application area. axial wise permanent machines with magnets, fewer cores due to high power-to-weight ratio Due to the fact that they require material and disk-shaped rotor and stator structures. radial flux permanent magnet machines due to their smaller dimensions has significant advantages over Compared to radial flux motors, axial flux motors have high power and torque density W/m3, Nm/m3).

Since high output power can be obtained with small motor dimensions, axial flow type motors, especially electric cars, bicycles and wind It is being used more and more in applications such as turbines.

The output power of axial flux motors is proportional to the cube of the outer radius of the motor.

Axial length due to windings around the stator windings is getting angry. If the number of turns can be kept limited, the axial length of the motor can be can be minimized. However, if the number of turns is not sufficient, the motor's axial the length has to be increased to obtain the required number of turns. An axial drive in which the stator and a rotor are placed parallel to a rotating shaft. cavity motor is described. In particular, in broadcast, easily produced and an axial clearance motor with improved efficiency is described. axial In a cavity motor, the stator is a rear yoke, each of which forms a magnetic path. having a central portion parallel to the rotating shaft and multiple stator cores connected to the yoke and each associated stator It consists of multiple stator coils wrapped around the central part of its core. casting or milling, punching and hydrocutting or wire cutting winding with grooves and produced by a combination of methods such as axial flow permanent magnet motors consisting of coil elements such as The coils used are described. Also, connecting each coil element It also includes grooves for the connector. In addition to the document, wavy winding type by casting or by milling, punching and hydrocutting or produced by a combination of methods such as wire cutting and Coils used in axial flow permanent magnet motors are described.

The first phase of the coils consists of a single coil element or smaller. It is assembled with parts and when placed on the assembly table, it is completely includes upward-facing grooves. Said grooves are fitted with grooves on both sides. so that it fits into the downward facing grooves in the second coil element with is placed. not filled by the grooves in the second coil element with grooves in the first coil element in the upward facing second element grooves, the first coil with grooves facing downwards only to be filled with grooves in the third coil element, which may be identical with the is placed in a row. Other exemplary patent documents are USZOl40285048, On the other hand, with this invention, in addition to the windings in the stator coils, there are additional windings. and in this way, the number of windings in the stator coils can be reduced. is provided. In this way, the axial length of the motor can be reduced and the motor it has a more compact structure.

With this invention, additional windings are defined by the features characterized in claim 1. A permanent magnet axial flux electric machine is realized.

The object of this invention is to use a permanent magnet axial flux with a shortened axial length. realization of electrical machine.

The axial electric machine of the invention is a stator system and a rotor system. contains. Multiple symmetrical toroidal winding stators in additional winding form placed on the yoke and between each pair of stator coils. at least partially between the planar sides of said stator yoke extends radially.

The accompanying figures only outline above the advantages over the prior art. a permanent-magnet axial axis described and described in detail below It is given for the purpose of exemplifying the smart electric machine.

The figures do not limit the scope of protection defined in the claims and this without reference to the technical explanation in the explanation part of the invention, alone for the purpose of interpreting the scope defined in the claims should not be used. The figures are given for illustrative purposes only and dimensions and the purpose of reflecting the relative sizes of the relevant components of the system. does not carry.

Figure 1 is an axial flux electric in art with stator and rotor systems. is the perspective view of the machine.

Figure 2 is an embodiment of the invention, in the assembled condition, with the stator yoke. is a perspective view of the stator system with and stator teeth.

Figure 3 shows the stator and rotor systems and the additional stator in one embodiment of the invention. This is a perspective view of an axial flux electric machine with windings.

Figure 4 shows the stator and rotor systems and the additional stator in one embodiment of the invention. side view of an axial flux electric machine with windings.

The parts in the figures are numbered one by one and the corresponding numbers are given below: 1. Axial intelligent electric machine 2. Stator system 3. Rotor system 4. Stator teeth . stator coil 6. Stator yoke 7. Rotor yoke 8. Permanent magnet 9. Additional winding The subject of the invention is the permanent magnet (8) axial flux electric machine (1). comprises stator and rotor systems (2 and 3) in the known manner.

The permanent magnets (8) are attached to the rotor yoke (7). stator and rotor yokes (6, 7) are both carrying stator coils (5) producing axial flux. It is mounted to the stator teeth (4) in a manner known in the art. Stator teeth (4) It is preferably formed separately to be attached to the yoke. Permanent rotor by means of magnets (8), corresponding protrusions (not shown in the figures) it is fixed to the yoke (7). Preferably, the stator teeth (4) are pure insulated iron powder (SMC: Soft Magnetic Composite) material) and the relevant protrusions (in figures) (not shown) to be attached to the stator yoke (6) via as wrapped. SMC for obtaining stator and rotor systems (2 and 3) material and ferromagnetic sheet lamination can be used together.

In one embodiment of the invention, toroidal windings in the form of additional winding (9) are The stator yoke (6) is attached to the structure so that the stator coil (5) remains between the pair. is added. Between both planar sides of the stator yoke (6) Additional windings (9) extending at least partially radially are usually reliably supported above.

Additional windings (9) are wound on the coils as three-phase on the stator.

In order to obtain the desired output power from the axial electric machine (1), The ampere windings of the system must be sufficient. System insufficient amperage When it has windings, the current or the number of turns needs to be increased.

Increasing the current increases the motor losses and improves the efficiency of the motor. decreases. On the other hand, in such cases, the length of the stator teeth (4) The winding must be increased and the external axial dimensions of the motor must be increased. Increasing the number is not always appropriate. Instead of these approaches, this invention With the additional winding, the windings are placed on the yoke between the coils. area is provided.

In this invention, there is a corresponding 23% of the windings on the stator coils (5). if the amount is wound in addition to the stator yokes (6), the average It was observed that the torque increased by 11.5% without causing additional oscillation.

Therefore, the motor performances of systems with additional windings (9) and especially the direct result of the proposed arrangement when the output torques are compared can be seen. Since the additional windings (9) are not placed in the axial direction, the stator they do not contribute as much as the windings wrapped around their teeth (4). However, this supplement the windings (9) still cause a noticeable effect, i.e. axial it increases the output power or efficiency of the electrical machine (1).

If it is desired to increase the efficiency, the windings on the stator coils (5) should be Reducing the number of coils and using larger diameter coils will reduce the resistance. and will minimize copper losses. In this way, the same ampere winding is obtained. will be. Another advantage of this system is the winding around the stator teeth (4). same number, keeping the number constant and adding additional windings (9) on the yoke. It is possible to obtain higher output power from the current. In summary, with the present invention, a stator yoke (6) and windings are wound around the stator. a stator system (2) having teeth (4) and a rotor yoke (7) and each one in a different relative position above said rotor yoke (7) comprising a rotor system (3) with multiple permanent magnets (8) placed an axial electric machine (1) is realized.

In one embodiment of this invention, multiple symmetrical coils in the form of additional winding (9) are used. toroidal winding, each of said additional windings (9) the stator so that it completely surrounds a radial extension of the yoke (6) it is placed on the yoke (6).

In another embodiment of the invention, said toroidal in the form of additional winding (9) each of the windings is placed between each pair of stator coil (5).

In another embodiment of the invention, said additional windings (9) are securely both planar sides of the stator yoke (6) so that it is supported lies at least partially radially between them.

In another embodiment of the invention, each of the stator and rotor yokes 6, 7 It is produced from laminated sheets.

In another embodiment of the invention, the stator teeth (4) are made of soft magnetic composite. material, without being mounted on the stator yoke (6) is wound, then attached to the stator yoke (6).

In another embodiment of the invention, the stator teeth (4) and permanent magnets (8), the stator and to be attached to the corresponding protrusions of the rotor yokes (6, 7) contain grooves on their surfaces.

In another embodiment of the invention, toroidal windings in the form of additional windings (9), fixed to the stator yoke (6) and removed from said stator yoke (6) in place by the protruding cutting tool (not shown in the figures). are held.

In this way, thanks to this invention, additional An axial flux motor that takes up less axial space through the windings (9) is carried out.

Claims (7)

REQUESTS 1) A stator system (2) having a stator yoke (6) and stator teeth (4) around which windings are wound, and a rotor yoke (7), and a plurality of multiples each located in a different relative position above said rotor yoke (7). With multiple symmetrical toroidal windings in the form of additional windings (9), each of which is placed on top of the stator yoke (6), completely surrounding a radial extension of said rotor yoke (6), comprising a rotor system (3) having a permanent magnet (8) characterized by an axial intelligent electric machine (1). 2) An axial flux electric machine (1) as in Claim 1, characterized by each said toroidal winding in the form of an additional winding (9) placed between each pair of stator coil (5). 3) An axial flux electric machine (1) as in claim 1 or 2, characterized by said additional windings (9) extending at least partially radially between both planar sides of the stator yoke (6) so as to be securely supported. . 4) An axial flux electric machine (1) as in any one of the above claims, characterized by stator and rotor yokes (6, 7), each of which is produced from laminated plate. 5) An axial flux electric machine (1) as in any one of the above claims, characterized by stator teeth (4) produced using soft magnetic composite material, wound on the stator yoke (6) without being mounted, and then attached to the stator yoke (6). 6) An axial electric machine (1) as in any one of the above claims, characterized by stator teeth (4) and permanent magnets (8), which contain grooves on their base surfaces, to be attached to the corresponding protrusions of the stator and rotor yokes (6, 7). 7) An axial electric machine (1) as in any of the above claims, characterized by toroidal windings in the form of additional windings (9) fixed to the stator yoke (6) and held in place by the cutting means protruding from said stator yoke (6).