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CN-122026677-A - Speed regulating motor with inner stator

CN122026677ACN 122026677 ACN122026677 ACN 122026677ACN-122026677-A

Abstract

The invention relates to the technical field of motors, in particular to an inner stator speed regulating motor which comprises a base component, a controller, an outer rotor component, an intermediate rotor component and an inner stator component. The machine base assembly comprises a left outer cover, a machine base shell and a right outer cover, the outer rotor assembly comprises a left flange shaft, a rotor shell, an outer winding iron core and a right flange shaft, the middle rotor assembly comprises an inner permanent magnet group, an outer permanent magnet group, a middle rotor shell, a left end cover and a right end cover, and the inner rotor assembly comprises a fixed shaft and an inner winding iron core. The inner stator speed regulating motor adopts a fixed structure of the inner stator winding, eliminates the damage of centrifugal force action on the notch structure of the iron core in the winding rotating process, is highly integrated with the winding permanent magnet speed regulator in the radial direction, and reduces the position size space required by the serial installation of the original two sets of equipment.

Inventors

  • CHEN HAIDONG
  • YANG KEYIN
  • Ran Tiancheng
  • XU JUNFENG

Assignees

  • 江苏磁谷科技股份有限公司

Dates

Publication Date
20260512
Application Date
20260126

Claims (10)

  1. 1. The inner stator speed regulating motor comprises a machine base assembly (1), a controller (2), an outer rotor assembly (3), an intermediate rotor assembly (4) and an inner stator assembly (5), and is characterized in that the machine base assembly (1) comprises a left outer cover (1 a), a machine base shell (1 b) and a right outer cover (1 c), the outer rotor assembly (3) comprises a left flange shaft (31), a rotor shell (32), an outer winding iron core (33) and a right flange shaft (34), the intermediate rotor assembly (4) comprises an inner permanent magnet group (41), an outer permanent magnet group (42), a right end cover (43), a left end cover (44) and an intermediate rotor shell (45), and the inner stator assembly (5) comprises a fixed shaft (51) and an inner winding iron core (52); the outer rotor assembly (3), the middle rotor assembly (4), the inner stator assembly (5) and the base assembly (1) are mutually radially and coaxially nested and supported for rotation through bearings; an inner winding iron core (52) of the inner stator assembly (5) and an inner permanent magnet group (41) of the middle rotor assembly (4) form a motor magnetic coupling pair I, and an electrified magnetic field of the inner winding iron core (52) and a permanent magnetic field of the inner permanent magnet group (41) interact to transfer torque; An outer winding iron core (33) of the outer rotor assembly (3) and an outer permanent magnet group (42) in the middle rotor assembly (4) form a power generation magnetic coupling pair II, and a power generation magnetic field of the outer winding iron core (33) and a permanent magnetic field of the outer permanent magnet group (42) interact to transfer torque; the fixed shaft (51) is connected and fixed with the left outer cover (1 a); the outer winding iron core (33) is connected with the controller (2) through the collecting ring (12) and the carbon brush (13), and the output rotating speed of the outer rotor assembly (3) can be controlled by adjusting the induction current and the voltage of the outer winding iron core (33) through the controller (2).
  2. 2. The internal stator speed regulating motor according to claim 1, wherein the controller (2) is connected with a power grid, and slip power of the external rotor assembly (3) and the intermediate rotor assembly (4) can be fed back to the power grid through the controller (2).
  3. 3. The internal stator speed regulating motor according to claim 1, wherein the inner winding core (52) is connected to a power grid through the lead wire b (15).
  4. 4. The motor according to claim 1, wherein the rotor housing (32) is fixedly connected to the outer winding core (33), and the intermediate rotor housing (45) is fixedly connected to the inner permanent magnet group (41) and the outer permanent magnet group (42), respectively.
  5. 5. The internal stator speed regulating motor according to claim 1, wherein the inner winding core (52), the inner permanent magnet group (41), the intermediate rotor case (45), the outer permanent magnet group (42), the outer winding core (33) and the rotor case (32) are sequentially arranged in a radial direction of the fixed shaft (51).
  6. 6. An internal stator speed regulating motor according to any one of claims 1-5, wherein the external rotor assembly (3) comprises a left flange shaft (31), a rotor housing (32), an external winding core (33), a right flange shaft (34), the external rotor assembly (3) being rotatably supported on the housing assembly (1), the left flange shaft (31) and the right flange shaft (34) being mounted on the left external cover (1 a) and the right external cover (1 c) by means of the first bearing (6) and the second bearing (7), respectively.
  7. 7. An inner stator speed regulating motor according to any one of claims 1-5, characterized in that the fixed shaft (51) is fixed to the left flange shaft (31) and the right flange shaft (34) of the outer rotor assembly (3) through the third bearing (8) and the fourth bearing (9), while the fixed shaft (51) is fixedly connected to the left outer cover (1 a) without rotation.
  8. 8. An internal stator speed regulating motor according to any one of claims 1-5, further comprising a left end cover (44) and a right end cover (43) rotatably supported on the fixed shaft (51), the left end cover (44) and the right end cover (43) being coaxially arranged with the fixed shaft (51) and mounted on the fixed shaft (51) by means of the fifth bearing (10) and the sixth bearing (11), respectively.
  9. 9. The internal stator speed regulating motor according to claim 8, wherein the outer permanent magnet group (42) is fixed to an outer wall of the intermediate rotor housing (45), the inner winding core (52) is located inside the intermediate rotor assembly (4), the inner permanent magnet group (41) is fixed to an inner wall of the intermediate rotor housing (45), and the inner winding core (52) is fixedly connected with the fixed shaft (51).
  10. 10. An internal stator speed regulating motor according to claim 1, wherein the outer winding core (33) is electrically connected with the controller (2) through the collecting ring (12), the carbon brush (13) and the lead a (14), and the collecting ring (12) is sleeved on the shaft neck of the left flange shaft (31).

Description

Speed regulating motor with inner stator Technical Field The invention relates to the technical field of motors, in particular to an internal stator speed regulating motor. Background The speed regulation operation is one of the best modes for realizing the energy saving of the motor, and mainly comprises three modes of electromagnetic speed regulation, cascade speed regulation and variable frequency speed regulation. The electromagnetic speed regulation efficiency is low, slip power loss is large, the axial length is long, the occupied space of equipment is large, and the field installation is inconvenient. The cascade speed regulation does not have low voltage ride through capability, and when the voltage of the power grid drops, the motor keeps the output torque unchanged, the stator current increases, and the rotor side induced current is larger. Because the frequency converter of the slip power conversion device is directly connected in series on the rotor loop, the slip power conversion device is easy to burn out due to overlarge current, and the motor is stopped from fault. The key device of variable frequency speed regulation has large capacity, complex technology, high manufacturing cost, high requirement on installation environment and difficult maintenance and overhaul. The motor has the advantages of high efficiency, small volume, capability of bearing short-time voltage drop, simple and stable structure, low cost, and high concentricity with the existing standard motor, thereby replacing the existing common motor on the market. Disclosure of Invention The invention aims to solve the technical problems that the slip speed regulating equipment is complex in structure and large in volume and cannot resist voltage drop, and radially integrates the high-efficiency permanent magnet motor and the high-efficiency permanent magnet speed regulator. The invention solves the technical problems by adopting the technical scheme that the internal stator speed regulating motor comprises a base component, a controller, an external rotor component, an intermediate rotor component and an internal stator component, wherein the base component comprises a left external cover, a base shell and a right external cover, the external rotor component comprises a left flange shaft, a rotor shell, an external winding iron core and a right flange shaft, the intermediate rotor component comprises an internal permanent magnet group, an external permanent magnet group, a right end cover, a left end cover and an intermediate rotor shell, and the internal stator component comprises a fixed shaft and an internal winding iron core; The outer rotor assembly, the middle rotor assembly, the inner stator assembly and the base assembly are mutually radially and coaxially nested and supported for rotation through bearings; An inner winding iron core of the inner stator assembly and an inner permanent magnet group of the middle rotor assembly form a motor magnetic coupling pair I, and an electrified magnetic field of the inner winding iron core and a permanent magnetic field of the inner permanent magnet group interact to transfer torque; An outer winding iron core of the outer rotor assembly and an outer permanent magnet group in the middle rotor assembly form a second electromagnetic coupling pair, and an induced magnetic field of the outer winding iron core interacts with a permanent magnetic field of the outer permanent magnet group to transfer torque; the fixed shaft is connected and fixed with the left outer cover; the outer winding iron core is connected with the controller through the collecting ring and the carbon brush, and the output rotating speed of the outer rotor assembly can be controlled by adjusting the induction current and the voltage of the outer winding iron core through the controller. The controller is connected with a power grid, and slip power of the outer rotor assembly and the middle rotor assembly can be fed back to the power grid through the controller. And the inner winding iron core is connected with a power grid through the lead b. The rotor shell is fixedly connected with the outer winding iron core, and the inner and outer walls of the middle rotor shell are respectively provided with the inner permanent magnet group and the outer permanent magnet group. The inner winding iron core, the inner permanent magnet group, the middle rotor shell, the outer permanent magnet group, the outer winding iron core and the rotor shell are sequentially arranged along the radial direction of the fixed shaft. The outer rotor assembly comprises a left flange shaft, a rotor shell, an outer winding iron core and a right flange shaft, the outer rotor assembly can be rotatably supported on the base assembly, and the left flange shaft and the right flange shaft are respectively installed on the left outer cover and the right outer cover through a first bearing and a second bearing. The fixed shaft is fixed on a left flange shaf