Dual-winding disc motor with additional torque and driving method thereof

Abstract

The application belongs to the field of high-speed disc type motor, and particularly relates to a double-winding disc type motor with additional torque and a driving method thereof. The double-winding disc type motor comprises a stator shell, a motor stator embedded wire part installed in the stator shell, a motor main shaft and a motor rotor. The motor stator embedded wire part comprises a stator core, winding slots arranged on the stator core and a stator winding regularly embedded in the winding slots. The stator winding comprises a main winding and an auxiliary winding separated by a separation structure. The main winding is a double-layer lap winding, and the auxiliary winding is a single-layer winding. The stator shell is further provided with a main winding leading-out wire connected with the main winding and an auxiliary winding leading-out wire connected with the auxiliary winding. In the application, the disc type motor can provide high power when starting to speed up, guaranteeing the large load dragging capacity of the motor, and can provide rated power when at rated speed, guaranteeing the operation economy of the motor.

Description

Technical Field

[0001] This invention belongs to the field of high-speed disc motors, and particularly relates to a dual-winding disc motor with additional torque and its driving method. Background Technology

[0002] Disc motors are widely used in high-speed rotating machinery, especially in engineering applications such as electric vehicles, energy storage flywheels, and wind power generation, due to their compact structure and high efficiency.

[0003] In practical engineering, when a disc motor drives a large load for starting, it often experiences insufficient starting torque and slow acceleration. If a high-power motor design with a large margin is adopted, it will result in power redundancy and affect the economic efficiency of motor operation.

[0004] To solve this technical problem, it is urgent to design a disc motor structure that can provide high power during startup and speed-up to ensure the motor's ability to drive heavy loads, while also providing rated power at rated speed to ensure the motor's economical operation. Summary of the Invention

[0005] The purpose of this invention is to provide a dual-winding disc motor and its driving method that can output large torque during startup and meet the requirements of long-term, high-speed stable operation of high-speed rotating machinery. By designing reasonable structural dimensions and winding parameters for the main stator winding, the long-term stable operation and economical operation of the high-speed rotating machinery are ensured; by designing the structure and parameters of the auxiliary winding, the disc motor can output a large starting torque.

[0006] The technical solution adopted by the present invention to solve this problem is as follows:

[0007] A dual-winding disc motor with additional torque includes a stator housing, a motor stator winding assembly installed within the stator housing, a motor main shaft, and a motor rotor. The motor stator winding assembly includes a stator core, winding slots disposed on the stator core, and stator windings embedded in the winding slots according to a certain rule. The stator windings include a main winding and an auxiliary winding separated by an isolation structure. The main winding is a double-layer lap winding, and the auxiliary winding is a single-layer winding. The stator housing is also provided with main winding leads connected to the main windings and auxiliary winding leads connected to the auxiliary windings.

[0008] Preferably, the stator slot inside the stator housing is an annular slot structure, and the inner diameter of the annular slot where the motor stator winding component is located is 30mm to 40mm, the outer diameter is 130mm to 150mm, and the depth is 23mm to 28mm.

[0009] Further preferably, the motor rotor is a center-holed permanent magnet or soft magnetic disc, which is rotatably installed in the stator shell by a motor spindle, the inner diameter of the motor rotor is 15-20mm, the outer diameter is 90-105mm, and the thickness is 1-3mm.

[0010] Further preferably, the stator core is fixedly installed on the inner side wall of the stator shell, the inner diameter of the motor stator core is 65-75mm, the outer diameter is 90-105mm, and the height is 23-28mm.

[0011] Further preferably, the upper end surface of the stator core is circumferentially and uniformly distributed with 24 slots.

[0012] Further preferably, the main winding is star-connected, each slot has a double-layer lap winding, the number of coils of each phase is 8, the number of turns of each coil winding is 30-60 turns, and the wire diameter is 0.30-0.50mm.

[0013] Further preferably, the auxiliary winding is star-connected, each slot has a single-layer winding, the number of coils of each phase is 8, the number of turns of each coil winding is 10-20 turns, and the wire diameter is 0.20-0.40mm.

[0014] Further preferably, the isolation structure is a partition plate arranged between the main winding and the auxiliary winding, and the partition plate is an annular strip-shaped magnetic insulation structure.

[0015] Further preferably, the supply voltage of the main winding lead-out wire and the auxiliary winding lead-out wire is 300-450V.

[0016] The second inventive purpose of the application is to also provide a driving method of the double-winding disc motor with additional torque, comprising the following steps:

[0017] S101: when the disc motor is started, the main winding lead-out wire and the auxiliary winding lead-out wire supply power to the main winding and the auxiliary winding respectively, and the double windings work together to ensure large torque output during startup and speed-up;

[0018] S102: when the disc motor is speeded up to the rated speed, the power supply to the auxiliary winding is stopped, and the disc motor is driven by the main winding for long-term stable operation.

[0019] The application has the advantages and positive effects that:

[0020] 1. In the application, the double windings work together during startup of the disc motor to ensure large torque output during startup and speed-up, and the auxiliary winding is cut off during rated operation, and the disc motor is operated by the main winding to ensure long-term stable operation of the disc motor, which can simultaneously meet the dual operating point operation requirements of rated operation and startup and speed-up of high-speed rotating machinery.

[0021] 2. In the application, the disc type motor can provide large power when starting to speed up, ensuring the large load drag capacity of the motor, and can provide rated power when rated speed, ensuring the economy of the motor operation.

[0022] 3. In the application, by designing the reasonable structure size and winding parameters of the main stator winding, the long-term stable operation and operation economy of the high-speed rotating machine are ensured; by designing the structure and parameters of the auxiliary winding, the disc type motor can output larger starting torque.

[0023] 4. In the application, the selection of each structure size parameter makes the overall axial size of the disc type motor short, which can be applied to narrow space or special occasions requiring high torque density, and has structural particularity.

[0024] 5. In the application, the auxiliary winding is applied in the motor starting process, and the auxiliary motor starts by itself, which is suitable for occasions with load starting or difficult starting.

[0025] 6. In the application, the selection of each structure size parameter makes the disc type motor suitable for small power level and high speed application occasions.

[0026] 7. In the application, by selecting appropriate main winding parameters and motor rotor parameters, the disc type motor can realize high-speed operation of more than 50,000 rpm per minute at the power level of hundreds of watts, which benefits from the compact design of stator parameters and the simple and reliable disc type structure design of the motor rotor.

[0027] 8. In the application, by selecting appropriate auxiliary winding parameters, the motor can provide more than 20% additional output torque during the speed-up process, which can effectively drive the motor to speed up. BRIEF DESCRIPTION OF DRAWINGS

[0028] The technical solutions of the application will be further described in detail below in combination with the drawings and embodiments, but it should be known that these drawings are designed only for explanatory purposes, and therefore do not limit the scope of the application. In addition, unless specifically indicated, these drawings are only intended to conceptually illustrate the structural configuration described herein, and do not necessarily be drawn in proportion.

[0029] Figure 1 is a schematic diagram of a disc type motor structure with additional torque provided by the application;

[0030] Figure 2 is a schematic diagram of the structure in the motor stator slot;

[0031] Figure 3 is a schematic diagram of the top view structure of the motor stator wire embedding part in the application.

[0032] In the figure: 1, motor rotor; 2, motor stator embedded wire part; 3, motor main shaft; 4, motor stator shell; 5, stator core; 6, stator winding; 7, main winding lead; 8, auxiliary winding lead; 9, main winding; 10, auxiliary winding; 11, partition. DETAILED DESCRIPTION

[0033] First of all, it needs to be noted that the specific structure, features and advantages of the present application will be specifically described below in an exemplary manner, however, all the descriptions are only for illustration and should not be understood as forming any limitation on the present application. In addition, any single technical feature described or implied in the embodiments mentioned in the present text, or any single technical feature shown or implied in the drawings, can still continue to be combined or deleted between these technical features (or their equivalents), so as to obtain more other embodiments of the present application which can not be directly mentioned in the present text. In addition, for the purpose of simplifying the drawing, the same or similar technical features can only be marked in one place in the same drawing.

[0034] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "setting", "connecting", "fixing", "screwed" and other terms should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited, the above-mentioned terms in the present application can be understood according to the specific meaning by the person skilled in the art. The present application will be specifically described below in conjunction with the drawings.

[0035] Example 1:

[0036] An additional torque double-winding disc motor, comprising a stator shell 4, a motor stator embedded wire part 2 mounted in the stator shell 4, a motor main shaft 3 and a motor rotor 1, the motor stator embedded wire 2 comprises a stator core 5, a winding slot arranged on the stator core 5 and a stator winding 6 regularly embedded in the winding slot, the stator winding 6 comprises a main winding 9 and an auxiliary winding 10 separated by a partition structure, the main winding 9 is a double-layer lap winding, and the auxiliary winding 10 is a single-layer winding; the stator shell 4 is further provided with a main winding lead-out wire 7 connected with the main winding 9 and an auxiliary winding lead-out wire 8 connected with the auxiliary winding 10.

[0037] In this embodiment, the double-winding disc motor comprises a motor stator embedded wire part 2 (consisting of a stator core, a main stator winding, and an auxiliary stator winding), a motor rotor 1, a stator housing 4, an insulation structure, and a motor main shaft 3. Among them: the motor stator embedded wire part 2 is composed of a stator core 5 and a stator winding 6 regularly embedded in the stator core slot, the stator core 5 is provided with a winding slot, the stator winding 6 includes a main winding 9 and an auxiliary winding 10, the main winding lead-out wire 7 supplies power to the main winding 9, and the auxiliary winding lead-out wire 8 supplies power to the auxiliary winding 10.

[0038] When the disc motor starts, the main winding lead-out wire 7 supplies power to the main winding 9, and the auxiliary winding lead-out wire 8 supplies power to the auxiliary winding 10, and the double windings work together to ensure large torque output during startup speed-up; during rated operation, the auxiliary winding 10 is cut off (stopping power supply through the auxiliary winding lead-out wire 8), and the main winding 9 operates to ensure the long-term stable operation of the disc motor, which can meet the dual operating point operation requirements of high-speed rotating machinery rated operation and startup speed-up, so that the disc motor can provide high power during startup speed-up to ensure the large load dragging capacity of the motor, and can provide rated power at rated speed to ensure the economy of the motor operation.

[0039] Further, in this embodiment, the stator slot in the stator housing 4 is a ring slot structure, the ring slot in which the motor stator embedded wire part 2 is located has an inner diameter of 30mm to 40mm, an outer diameter of 130mm to 150mm, and a depth of 23mm to 28mm.

[0040] Further, in this embodiment, the motor rotor 1 is rotatably installed in the stator housing 4 through the motor main shaft 3, the motor rotor 1 is a center-holed disc, the material is permanent magnet or soft magnetic material, the inner diameter is 15mm to 20mm, the outer diameter is 90mm to 105mm, and the thickness is 1mm to 3mm.

[0041] Further, in this embodiment, the stator core 5 is fixedly installed on the inner side wall of the stator housing 4, the motor stator core 5 has an inner diameter of 65mm to 75mm, preferably 72mm, an outer diameter of 90mm to 105mm, preferably 105mm, and a height of 23mm to 28mm, preferably 25mm.

[0042] Further, in this embodiment, the upper end surface of the stator core 5 is circumferentially distributed with 24 slots.

[0043] The selection of the size parameters of the above ring slot structure, the motor rotor 1, and the stator core 5 makes the overall axial size of the disc motor short, which can be applied to narrow spaces or special occasions requiring high torque density, and has a special structure.

[0044] Embodiment 2:

[0045] By designing the reasonable structure size and winding parameters of the main stator winding, the long-term stable operation and the operation economy of the high-speed rotating machine are ensured; by designing the structure and parameters of the auxiliary winding, the disc-type motor can output larger starting torque. For example, the main winding 9 is star-connected, double-layer winding is arranged in each slot, the number of coils of each phase is 8, the number of turns of each coil winding is 30 turns to 60 turns, preferably 35 turns, the wire diameter is 0.30 mm to 0.50 mm, preferably 0.38 mm, by designing the reasonable structure size and winding parameters of the main stator winding, the long-term stable operation and the operation economy of the high-speed rotating machine are ensured. The auxiliary winding 10 is star-connected, single-layer winding is arranged in each slot, the number of coils of each phase is 8, the number of turns of each coil winding is 10 turns to 20 turns, preferably 15 turns, the wire diameter is 0.20 mm to 0.40 mm, preferably 0.33 mm, by designing the structure and parameters of the auxiliary winding, the disc-type motor can output larger starting torque.

[0046] The selection of the size parameters of the above main winding 9, auxiliary winding 10, motor rotor 1 and stator core 5 can achieve the following effects:

[0047] From the structure, the selection of the above size parameters makes the overall axial size of the disc-type motor short, which can be applied to special occasions such as narrow space or high torque density, and has structural particularity.

[0048] From the function, the auxiliary winding is applied to the motor starting process, the auxiliary motor is self-starting, and is suitable for occasions with load starting or difficult starting.

[0049] From the main size parameters, the set of structure parameters is suitable for application occasions of small power level and high speed. On the one hand, by appropriately selecting the main motor winding parameters and the motor rotor parameters, the disc-type motor can realize high-speed operation of more than 50,000 rpm per minute at the power level of hundreds of watts, which benefits from the compact design of the stator parameters and the simple and reliable disc-type structure design of the motor rotor, which is the advantage of the motor design. On the other hand, the design of the auxiliary winding can provide more than 20% of the additional output torque for the motor during the speed-up process, which can effectively drive the motor to speed up.

[0050] Furthermore, in the present embodiment, the isolation structure can be considered as a partition plate 11 arranged between the main winding 9 and the auxiliary winding 10, the partition plate is a magnetic isolation material, as a preferred, the partition plate 11 is a ring-shaped magnetic isolation material, which is used to isolate and insulate the main winding and the auxiliary winding, and is used to isolate the electromagnetic interference between the main winding and the auxiliary winding.

[0051] Further, it is also considered in the embodiment that the supply voltage of the main winding lead 7 and the auxiliary winding lead 8 is 300-450V, preferably 380V.

[0052] In the embodiment, the main winding and the auxiliary winding are supplied with power simultaneously during the speed-up process of the disc motor, the double windings work together to provide large torque for auxiliary starting and speed-up; when the disc motor is speeded up to the rated speed, the supply of power to the auxiliary winding is stopped, and the disc motor is driven by the main winding for long-term stable operation.

[0053] Embodiment 3

[0054] A driving method of the double-winding disc motor with additional torque, comprising the following steps:

[0055] S101: when the disc motor is started, the main winding lead 7 and the auxiliary winding lead 8 supply power to the main winding 9 and the auxiliary winding 10 respectively, and the double windings work together to ensure large torque output during the starting and speed-up process;

[0056] S102: when the disc motor is speeded up to the rated speed, the supply of power to the auxiliary winding 10 is stopped, and the disc motor is driven by the main winding 9 for long-term stable operation. The auxiliary winding outputs large torque during the starting process of the disc motor, which can meet the requirements of long-term and high-speed stable operation of the high-speed rotating machinery.

[0057] The above embodiments have been described in detail, but the content described is only the preferred embodiment of the present application, and cannot be considered as limiting the implementation range of the present application. Any equivalent changes and improvements made according to the scope of the present application should still belong to the patent coverage range of the present application.

Claims

1. A dual-winding disc motor with additional torque, comprising a stator housing (4), a motor stator winding member (2) installed within the stator housing (4), a motor main shaft (3), and a motor rotor (1), characterized in that: The motor stator winding component (2) includes a stator core (5), winding slots disposed on the stator core (5), and stator windings (6) embedded in the winding slots according to a rule. The stator windings (6) include a main winding (9) and an auxiliary winding (10) separated by an isolation structure. The main winding (9) is star-connected, and each slot contains a double-layer lap winding. The auxiliary windings (10) are star-connected, and each slot contains a single-layer winding. The isolation structure is a partition (11) disposed between the main winding (9) and the auxiliary winding (10). The partition (11) is an annular strip magnetic insulation structure. The stator housing (4) is also provided with a main winding lead (7) connected to the main winding (9) and an auxiliary winding lead (8) connected to the auxiliary winding (10).

2. The dual-winding disc motor with additional torque according to claim 1, characterized in that: The stator slot inside the stator housing (4) is an annular slot structure. The inner diameter of the annular slot where the motor stator insert (2) is located is 30mm~40mm, the outer diameter is 130mm~150mm, and the depth is 23mm~28mm.

3. A dual-winding disc motor with additional torque according to claim 2, characterized in that: The motor rotor (1) is rotatably mounted in the stator housing (4) via the motor spindle (3). The motor rotor (1) is a permanent magnet or soft magnetic disk with a central hole, the inner diameter of which is 15~20mm, the outer diameter of which is 90~105mm, and the thickness of which is 1~3mm.

4. A dual-winding disc motor with additional torque according to claim 3, characterized in that: The stator core (5) is fixedly installed on the inner wall of the stator housing (4). The inner diameter of the stator core (5) is 65mm~75mm, the outer diameter is 90mm~105mm, and the height is 23mm~28mm.

5. A dual-winding disc motor with additional torque according to claim 4, characterized in that: The upper end face of the stator core (5) has 24 slots evenly distributed along the circumference.

6. A dual-winding disc motor with additional torque according to claim 1, characterized in that: The power supply voltage for the main winding lead (7) and the auxiliary winding lead (8) is 300-450V.

7. A driving method for a dual-winding disc motor with additional torque, characterized in that: Includes the following steps: S101: When the disc motor starts, the main winding lead (7) and the auxiliary winding lead (8) supply power to the main winding (9) and the auxiliary winding (10) respectively. The two windings work together to ensure a large torque output when starting and accelerating. S102: When the disc motor speeds up to the rated speed, it stops supplying power to the auxiliary winding (10) and the main winding (9) drives the disc motor to run stably for a long time.

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