High-power-density multi-layer flat linear motor

Abstract

The invention, which relates to the technical field of the motor equipment, discloses a high-power-density multi-layer flat linear motor comprising a stator fixing plate, an iron core and coil supporting plate, a three-phase iron core and coil, an air gap, a permanent magnet, a mover groove and a permanent magnet groove. Wherein the stator fixing plate fixes the four iron cores and the coil supporting plates, the three-phase iron cores and the three-phase coils are placed on the iron cores and the coil supporting plates, the electrifying phase sequence of the coils is A-B-C-A-B-C, and the directions of currents of the corresponding phases of coils of adjacent layers are opposite. The three permanent magnet grooves are embedded into the rotor groove, the three pairs of permanent magnets are correspondingly embedded into the three permanent magnet grooves respectively, and the arrangement mode of the magnetic poles of the permanent magnets is that the transverse magnetic poles and the longitudinal magnetic poles are arranged in an N-S alternating mode. According to the invention, the number of layers of the flat linear motor is reasonably increased, mechanical layout is carried out on the multi-layer flat linear motor, and three-phase alternating current is correctly introduced to control the direction and size of a stator magnetic field to be matched with a permanent magnet magnetic field on a rotor, so that unnecessary space and magnetic energy waste of the flat linear motor can be greatly reduced; reliability, efficiency and power density of operation of the multi-layer flat linear motor are improved.

Description

Technical Field

[0001] The invention relates to the technical field of motor equipment, and in particular to a high-power-density multi-layer flat linear motor. Background Art

[0002] A linear motor is a transmission device that converts electrical energy directly into linear motion mechanical energy without any intermediate conversion mechanism. It can be regarded as a rotating motor cut radially and unfolded into a plane.

[0003] A linear motor consists of two parts, a stator and a mover. Both the stator and the mover can be excited by electric excitation or permanent magnet excitation according to needs. Traditional flat linear motors are generally single-layer flat linear motors with simple structure and easy control. However, factors such as magnetic field edge effect, mechanical structure limitation, and low magnetic energy utilization will lead to low space utilization and power density. For specific small space and high power density working scenarios, single-layer flat linear motors often cannot meet the working requirements. Therefore, a high power density multi-layer flat linear motor is proposed. Summary of the invention 1. Technical issues to be resolved

[0004] In view of the deficiencies in the prior art, the present invention provides a high-power-density multi-layer flat linear motor, which solves the technical problems of low space utilization and power density of traditional single-layer flat linear motors. (II) Technical solution

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] A high-power-density multi-layer flat linear motor adopts an overall motor mechanical structure of stator-air gap-motor-air gap-stator-air gap-motor-air gap-stator-air gap-motor-air gap-stator, wherein four stators are fixed together to form a complete stator, and three movers are fixed together to form a complete mover.

[0007] A stator fixing plate of a high-power density multi-layer flat linear motor fixes 4 layers of iron cores and coil support plates, and 2 groups of three-phase iron cores and coils are placed on each layer of iron core and coil support plates.

[0008] A high-power-density multi-layer flat linear motor has a flat core and coil on each layer with an ABCABC phase sequence. The currents of each phase coil corresponding to adjacent layers are in opposite directions. For example, if the current of the three-phase coil on the first support plate is ABCABC, then the current of the three-phase coil on the second support plate is (-A)-(-B)-(-C)-(-A)-(-B)-(-C), and the current of the three-phase coil on the third support plate is ABCABC, and so on.

[0009] Three permanent magnet slots of a high-power-density multilayer flat linear motor are embedded in mover slots, and three pairs of permanent magnets are correspondingly embedded in the three permanent magnet slots.

[0010] A permanent magnet pole arrangement method of a high power density multi-layer flat linear motor is that the transverse and longitudinal poles are arranged alternately NS, such as the first longitudinal group of transverse poles is NS, the second longitudinal group of transverse poles is SN, and the third longitudinal group of transverse poles is NS, then the first transverse group of longitudinal poles is NSN, and the second transverse group of longitudinal poles is SNS. Beneficial Effects

[0011] 1. Half of the stator magnetic field of a traditional single-layer flat linear motor cannot act on the mover, while for a multi-layer flat linear motor, only half of the stator magnetic field of the first and last layers cannot act on the mover, and the stator magnetic field of the middle layer will not be wasted. By reasonably increasing the number of layers of the flat linear motor, the power of the motor can be greatly increased under the same volume, and the power density of the motor can be improved.

[0012] 2. Reasonable mechanical layout of the multi-layer flat linear motor and correct introduction of three-phase alternating current to control the direction and size of the stator magnetic field and the coordination of the permanent magnet magnetic field on the mover can greatly reduce unnecessary space waste of the multi-layer flat linear motor and improve the reliability, efficiency and power density of the multi-layer flat linear motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings.

[0014] Figure 1 The internal structure diagram of the high power density multi-layer flat linear motor of the present invention

[0015] Figure 2 This is the appearance diagram of the high power density multi-layer flat linear motor of the present invention

[0016] Figure 3 Schematic diagram of the local mechanical structure of the high power density multi-layer flat linear motor rotor of the present invention

[0017] Figure 4 Schematic diagram of the local mechanical structure of the permanent magnet slot of the high power density multi-layer flat linear motor of the present invention

[0018] Figure 5 Schematic diagram of the local mechanical structure of the permanent magnet of the high power density multi-layer flat linear motor of the present invention

[0019] Figure 6This is an embodiment diagram of the high power density multi-layer flat linear motor of the present invention DETAILED DESCRIPTION

[0020] The embodiment of the present application effectively solves the technical problems of low space utilization and power density of traditional single-layer flat linear motors by providing a high power density multi-layer flat linear motor.

[0021] Example

[0022] The technical solution in the embodiment of the present application effectively solves the technical problems of low space utilization and power density of traditional single-layer flat linear motors. The overall idea is as follows:

[0023] In view of the problems existing in the prior art, the present invention provides a high power density multi-layer flat linear motor, such as Figure 6 , including a multi-layer arrangement structure from top to bottom, the first layer is for placing iron core and winding, and the power-on phase sequence is (-A)-(-B)-(-C)-(-A)-(-B)-(-C)...; the second layer is for placing permanent magnets, and the magnetic poles of the permanent magnets are NSNS...; the third layer is for placing two layers of iron core and winding, the first layer is for a power-on phase sequence of ABCABC..., and the second layer is for a power-on phase sequence of (-A)-(-B)-(-C)-(-A)-(-B)-(-C)...; the fourth layer is for placing a permanent magnet layer, which is the same as the second layer; the fifth layer is for placing iron core and winding, which is the same as the third layer; the sixth layer is for placing a permanent magnet layer, which is the same as the second layer; the seventh layer is for placing iron core and winding, and the power-on phase sequence is ABCABC...

[0024] Working principle:

[0025] In the first step, the flat linear motor adopts a multi-layer structure, stacked up and down, with multiple layers of movers, placing more iron cores, windings and permanent magnets in a limited space to improve the utilization of their magnetic energy, which can greatly increase the power density of the flat linear motor.

[0026] The second step is to energize the coils and winding layers of the multi-layer flat linear motor in the correct phase sequence and place the magnetic poles in the permanent magnet layers in the correct order to ensure the reliability of the flat linear motor. At the same time, the middle layer of the coil and winding layers of the multi-layer flat linear motor can provide magnetic energy to the upper and lower permanent magnet layers at the same time, further improving the power density.

[0027] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from this are still within the scope of protection of the present invention.

Claims

1. A high power density multi-layer flat linear motor, characterized in that: The invention comprises a high power density multi-layer flat linear motor mechanical layout, wherein the motor mechanical layout is an iron core and coil support plate (01) - a three-phase iron core and coil (05) - an air gap (09) - a permanent magnet (15) - an air gap (10) - a three-phase iron core and coil (06) - an iron core and coil support plate (02) - an air gap (11) - a permanent magnet (16) - an air gap (12) - a three-phase iron core and coil (07) - an iron core and coil support plate (03) - an air gap (13) - a permanent magnet (17) - an air gap (14) - a three-phase iron core and coil (08) - an iron core and coil support plate (04), wherein the multi-layer mover and the stator work together to achieve the effect of improving the power density.

2. A high power density multi-layer flat linear motor, characterized in that: The invention comprises a stator structure of a high-power-density multi-layer flat linear motor, wherein the mover structure comprises a stator fixing plate (18), an iron core and a coil supporting plate (01, 02, 03, 04), and a three-phase iron core and a coil (05, 06, 07, 08). The stator fixing plate (18) fixes four iron cores and coil support plates (01, 02, 03, 04), and three-phase iron cores and coils (05, 06, 07, 08) are placed on the iron core and coil support plates (01, 02, 03, 04) respectively, so as to fix the entire stator part.

3. A high power density multi-layer flat linear motor, characterized in that: The invention includes a coil power-on mode for the high-power-density multi-layer flat linear motor core and the coil support plate, wherein the coil power-on mode is that the coils on each layer of core and coil support plate are two groups of three-phase core coils, and the coil power-on phase sequence is ABCABC, which achieves the effect of alternating arrangement of three phases A, B, and C. Any three adjacent cores and coils can be regarded as independent three phases. Except for the edge magnetic field, there are four groups of three-phase AC magnetic fields. Secondly, the currents of each phase coil corresponding to the adjacent layers are in opposite directions. For example, the current of the three-phase coil on the first support plate is (-A)-(-B)-(-C)-(-A)-(-B)-(-C), the current of the three-phase coil on the second support plate is ABCABC, and the current of the three-phase coil on the third support plate is (-A)-(-B)-(-C)-(-A)-(-B)-(-C), and so on, so as to improve the utilization rate of the magnetic field energy.

4. A high power density multi-layer flat linear motor, characterized in that: A mover structure of a high-power-density multi-layer flat-plate linear motor is provided, wherein the stator structure comprises a mover slot (19), a permanent magnet slot (20, 21, 22), and a permanent magnet (15, 16, 17). The three permanent magnet slots (20, 21, 22) are embedded in the mover slot (19), and the three pairs of permanent magnets (15, 16, 17) are respectively and correspondingly embedded in the three permanent magnet slots (20, 21, 22), thereby achieving the effect of fixing the mover part.

5. A high power density multi-layer flat linear motor, characterized in that: The invention comprises a high power density multi-layer flat linear motor permanent magnet pole arrangement mode, wherein the permanent magnet pole arrangement mode is that the transverse and longitudinal poles are arranged alternately in the NS manner, such as the first longitudinal transverse pole group is NS (15), the second longitudinal transverse pole group is SN (16), and the third longitudinal transverse pole group is NS (17). Then the first transverse longitudinal pole group is NSN, and the second transverse longitudinal pole group is SNS, which cooperate and work with the stator magnetic field.

Images