Variable frequency drive system dynamic response type intelligent reactor device

Abstract

The utility model discloses a kind of dynamic response type intelligent reactors of frequency conversion driving system, including support and the coil of being wound in iron cylinder, iron cylinder inner chamber is equipped with iron core and the piston piece that can slide up and down, piston piece is connected with driving device and is formed with the adjustable volume magnetic conduction filling space with iron cylinder inner wall.Magnetic conduction filling space and liquid storage box, pressure relief cylinder constitute closed loop magnetic conduction fluid circuit, and the injection amount of magnetic conduction fluid is accurately adjusted by piston displacement.Solved the technical problems of traditional mechanical adjustment large vibration, magnetic valve type reactor harmonic distortion high.

Description

Technical Field

[0001] This utility model relates to the field of reactor technology, and in particular to a dynamic response intelligent reactor device for a frequency conversion drive system. Background Technology

[0002] Traditional reactor regulation technology mainly suffers from the following technical bottlenecks: 1. Mechanically adjustable reactors, which adjust inductance by moving the air gap in the iron core, have the following drawbacks: direct coupling between the mechanical transmission components and the iron core results in: vibration noise exceeding 60dB during the adjustment process; and wear rate of moving parts >0.1mm / thousand cycles. 2. Magnetic valve-type controllable reactors, which rely on the saturation characteristics of the iron core for adjustment, suffer from: magnetic circuit asymmetry leading to harmonic distortion rate >8% (IEC 61000-3-6 test); and dynamic response time >100ms, failing to meet the requirements for rapid compensation. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a dynamic response intelligent reactor device for a frequency conversion drive system, which realizes inductance adjustment through hydraulic drive.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is: a dynamic response intelligent reactor device for a variable frequency drive system, including a support and a coil. An iron cylinder is located at the center of the support, and the coil is wound around the iron cylinder with electrode plates. The bottom surface of the iron cylinder is closed, and an iron core is located at the center of the cylinder cavity. A piston is slidably installed on the upper part of the cylinder cavity, and the piston is connected to a driving device. The piston and the inner wall of the iron cylinder surround a magnetically conductive filling space with an adjustable volume. The iron core is located within the magnetically conductive filling space. A liquid storage box is located on the side of the support, and a pressure relief cylinder is connected to the top of the liquid storage box. The liquid storage box is connected to the magnetically conductive filling space, and the magnetically conductive filling space and the interior of the liquid storage box are filled with magnetically conductive fluid.

[0005] In a further technical solution, the magnetic fluid meets the following conditions: magnetic permeability μ_r ≥ 500 and viscosity < 50 cP.

[0006] In a further technical solution, the top of the bracket is provided with a connecting seat, the top of the connecting seat is provided with a linear bearing, a drive rod is slidably assembled inside the linear bearing, the lower end of the drive rod is connected to a piston, the upper end of the drive rod is connected to a drive seat, the drive seat is set in the shape of an inverted cup, the inner cavity of the drive seat is movably sleeved on the outside of the linear bearing, and the drive seat is connected to a drive device.

[0007] In a further technical solution, the outer wall of the drive base is formed with a drive rack, which extends vertically and has limit stops formed on both sides; the top of the bracket is provided with a motor base, which is fixed with a servo motor, and the output shaft of the servo motor is provided with a drive gear, which meshes with the drive rack, and the side wall of the drive gear is respectively clearance-fitted with the inner side of the corresponding limit stop.

[0008] In a further technical solution, a vertical plate is provided on the side of the motor mount, and the servo motor is fixedly installed on the vertical plate.

[0009] In a further technical solution, the pressure relief cylinder includes a cylinder body, with an opening at the bottom of the cylinder body connected to a liquid storage box; a passive piston is slidably installed inside the cylinder body, and a solenoid valve is connected to the top of the cylinder body.

[0010] In a further technical solution, a control circuit is also provided, which is electrically connected to the solenoid valve and the drive device respectively.

[0011] The advantages of this invention compared to the prior art after adopting the above structure are:

[0012] 1. The adjustable magnetically filled space formed by the piston and the iron cylinder, combined with a magnetically permeable fluid with a permeability μ_r≥500, results in lower noise, greater durability, and reduced hysteresis loss compared to traditional air gap adjustment methods.

[0013] 2. The rigid coupling design of linear bearings and drive rack, combined with the precise control of servo motors, achieves a displacement resolution of ≤0.01mm and a shorter response time.

[0014] 3. The closed magnetic circuit structure in which the iron core is completely immersed in the magnetic fluid can reduce the leakage flux density and improve the heat dissipation efficiency compared with the traditional open magnetic circuit. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 This is a cross-sectional schematic diagram of the present invention. Detailed Implementation

[0018] The following are merely preferred embodiments of the present invention and do not limit the scope of protection of the present invention.

[0019] like Figure 1 and Figure 2As shown, the variable frequency drive system dynamic response intelligent reactor device includes a support 1 and a coil 3. An iron cylinder 4 is located at the center of the support 1, and the coil 3 is wound around the iron cylinder 4. The coil 3 is equipped with electrode plates. The bottom surface of the iron cylinder 4 is closed. An iron core 2 is located at the center of the cylinder cavity of the iron cylinder 4. A piston 22 is slidably installed on the upper part of the cylinder cavity of the iron cylinder 4. The piston 22 is connected to a driving device. The piston 22 and the inner wall of the iron cylinder 4 surround to form an adjustable magnetic filling space 20. The iron core 2 is located inside the magnetic filling space 20. A liquid storage box is located on the side of the support 1. A pressure relief cylinder is connected to the top of the liquid storage box. The liquid storage box is connected to the magnetic filling space 20, and the magnetic filling space 20 and the interior of the liquid storage box are filled with magnetic fluid.

[0020] The adjustable magnetically filled space 20 formed by the piston 22 and the iron cylinder 4, combined with a magnetically permeable fluid with a permeability μ_r≥500, has lower noise, is more durable, and reduces hysteresis loss compared to the traditional air gap adjustment method.

[0021] The closed magnetic circuit structure in which the iron core 2 is completely immersed in the magnetic fluid can reduce the leakage flux density and improve the heat dissipation efficiency compared with the traditional open magnetic circuit.

[0022] Specifically, the magnetic fluid meets the following conditions: magnetic permeability μ_r = 1000 and viscosity = 45 cP.

[0023] Specifically, the top of the bracket 1 is provided with a connecting seat 6, the top of the connecting seat 6 is provided with a linear bearing 61, a drive rod 21 is slidably assembled inside the linear bearing 61, the lower end of the drive rod 21 is connected to a piston 22, the upper end of the drive rod 21 is connected to a drive seat 5, the drive seat 5 is set in the shape of an inverted cup, the inner cavity of the drive seat 5 is movably sleeved on the outside of the linear bearing 61, and the drive seat 5 is connected to a drive device.

[0024] The rigid coupling design of the linear bearing 61 and the drive rack 51, combined with the precise control of the servo motor 71, achieves a displacement resolution of ≤0.01mm and a shorter response time.

[0025] Specifically, the outer wall of the drive base 5 is formed with a drive rack 51, which extends vertically and has limit stops 52 formed on both sides; the top of the bracket 1 is provided with a motor base 7, which is fixed with a servo motor 71. The output shaft of the servo motor 71 is provided with a drive gear 72, which meshes with the drive rack 51, and the side wall of the drive gear 72 is respectively clearance-fitted with the inner side of the corresponding limit stops 52.

[0026] Specifically, the motor base 7 has a vertical plate on its side, and the servo motor 71 is fixedly installed on the vertical plate.

[0027] Specifically, the pressure relief cylinder includes a cylinder body, with an opening at the bottom of the cylinder body connected to a liquid storage box; a passive piston 23 is slidably installed inside the cylinder body, and a solenoid valve 24 is connected to the top of the cylinder body.

[0028] Specifically, a control circuit is also provided, which is electrically connected to the solenoid valve 24 and the drive device.

[0029] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. A dynamic response intelligent reactor device for a variable frequency drive system, comprising a support (1) and a coil (3), characterized in that: An iron cylinder (4) is provided at the center of the support (1), and a coil (3) is wound around the iron cylinder (4). The coil (3) is provided with electrode plates. The bottom surface of the iron cylinder (4) is closed. An iron core (2) is provided at the center of the cylinder cavity of the iron cylinder (4). A piston (22) is slidably installed on the upper part of the cylinder cavity of the iron cylinder (4). The piston (22) is connected to a driving device. The piston (22) and the inner wall of the iron cylinder (4) surround each other to form an adjustable magnetic filling space (20). The iron core (2) is located within the magnetic filling space (20). The side of the support (1) is provided with a liquid storage box, and the top of the liquid storage box is connected to a pressure relief cylinder. The liquid storage box is connected to the magnetic filling space (20), and the magnetic filling space (20) and the interior of the liquid storage box are filled with magnetic fluid.

2. The dynamic response intelligent reactor device for a variable frequency drive system according to claim 1, characterized in that: The magnetic fluid meets the following conditions: magnetic permeability μ_r ≥ 500 and viscosity < 50 cP.

3. The dynamic response intelligent reactor device for a variable frequency drive system according to claim 2, characterized in that: The top of the bracket (1) is provided with a connecting seat (6), the top of the connecting seat (6) is provided with a linear bearing (61), a drive rod (21) is slidably assembled inside the linear bearing (61), the lower end of the drive rod (21) is connected to the piston (22), the upper end of the drive rod (21) is connected to a drive seat (5), the drive seat (5) is set in the shape of an inverted cup, the inner cavity of the drive seat (5) is movably sleeved on the outside of the linear bearing (61), and the drive seat (5) is connected to the drive device.

4. The dynamic response intelligent reactor device for a variable frequency drive system according to claim 3, characterized in that: The outer wall of the drive seat (5) is formed with a drive rack (51), which extends vertically and has limit stops (52) formed on both sides. The top of the bracket (1) is provided with a motor seat (7), which is fixed with a servo motor (71). The output shaft of the servo motor (71) is provided with a drive gear (72), which meshes with the drive rack (51). The side wall of the drive gear (72) is respectively clearance-fitted with the inner side of the corresponding limit stop (52).

5. The dynamic response intelligent reactor device for a variable frequency drive system according to claim 4, characterized in that: The motor mount (7) has a vertical plate on its side, and the servo motor (71) is fixedly installed on the vertical plate.

6. The dynamic response intelligent reactor device for a variable frequency drive system according to claim 1, characterized in that: The pressure relief cylinder includes a cylinder body, with an opening at the bottom of the cylinder body connected to the liquid storage box; a passive piston (23) is slidably installed inside the cylinder body, and a solenoid valve (24) is connected to the top of the cylinder body.

7. The dynamic response intelligent reactor device for a variable frequency drive system according to claim 6, characterized in that: It also includes a control circuit, which is electrically connected to the solenoid valve (24) and the drive device.

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