Permanent magnet linear motor testing device

Abstract

The invention discloses a test device of a permanent magnet linear motor. The test device comprises a stator test bench and a rotor test bench. The stator test bench comprises a base, a screw rod lifter, a linear guide rail, a sensor mounting rack and a coil mounting rack; the lead screw lifting machine and the linear guide rail are both installed above the base, the sensor installation frame is installed above the linear guide rail in a sliding mode, the sensor installation frame is in transmission connection with the lead screw lifting machine, the coil installation frame is installed above the sensor installation frame, and a stator coil is installed on the coil installation frame; the mover test bench comprises a mover fixing support, a rotating platform and a mover test wheel seat which are sequentially installed from bottom to top, the mover test wheel seat and the stator coil are arranged at preset intervals, and a plurality of magnets are continuously laid on the arc surface of the mover test wheel seat. The linear motion of the permanent magnet linear motor can be simulated, the gap between the rotor and the stator of the permanent magnet linear motor can be adjusted, and the occupied space is small.

Description

Technical Field

[0001] The invention belongs to the technical field of permanent magnet linear motors, and in particular relates to a test device for permanent magnet linear motors. Background Art

[0002] Since linear drives can achieve "zero" transmission, their applications in the fields of maglev transportation, wheel-rail transportation, logistics transmission, precision machine tools, etc. are increasingly valued. After using linear motor drives to replace traditional rotary motors, greater climbing ability, higher operating speeds, and stronger environmental adaptability can be achieved. At the same time, there is no contact between the mover and stator of the linear motor, no wear during force transmission, and low noise. Permanent magnets are used as motor movers to be installed on the mobile device. There is no need to provide power to the mobile device through a current receiving device, and the moving parts can be operated without electricity. It is suitable for working in an environment with high safety requirements (such as a workplace that requires explosion-proof).

[0003] In the study of permanent magnet linear motors, it is necessary to test the performance of the motor at different operating speeds. However, when conducting high-speed tests on permanent magnet linear motors, the traditional method requires the construction of a long test line to achieve a high operating speed. This will result in high manufacturing costs for the test device, and a large space is required for installing the test device. Summary of the invention

[0004] The purpose of the present invention is to provide a test device for a permanent magnet linear motor to solve the problems existing in the above-mentioned prior art.

[0005] To achieve the above-mentioned object, the present invention provides a test device for a permanent magnet linear motor, comprising a stator test bench and a mover test bench, which can simulate the linear motion of the permanent magnet linear motor through rotational motion;

[0006] The stator test bench comprises a base, a screw lift, a linear guide, a sensor mounting frame and a coil mounting frame; the screw lift and the linear guide are both installed above the base, the sensor mounting frame is slidably installed above the linear guide, and the sensor mounting frame is transmission-connected to the screw lift, the coil mounting frame is installed above the sensor mounting frame, and a stator coil is installed on the coil mounting frame;

[0007] The mover test bench comprises a mover fixing bracket, a rotating platform and a mover test wheel seat which are sequentially installed from bottom to top. The mover test wheel seat and the stator coil are arranged at a preset interval, and a plurality of magnets are continuously laid on the arc surface of the mover test wheel seat.

[0008] Optionally, the magnets are arranged in a Halbach arrangement or an N, S alternating arrangement.

[0009] Optionally, the stator coil is three-phase, including a plurality of air-core coils or iron-core coils with concentrated windings, and each of the coils is laid on the coil mounting frame at a preset interval.

[0010] Optionally, a plurality of sensors are installed between the sensor mounting frame and the coil mounting frame.

[0011] Optionally, the sensor uses a three-force sensor, which can measure the force generated by the motor in three directions of X / Y / Z.

[0012] Optionally, a slider is installed in the linear guide rail, and the sensor mounting frame is slidably installed above the linear guide rail through the slider.

[0013] Optionally, a lift base is installed on one side of the screw lift, and the other side is transmission-connected to the sensor mounting frame, and the lift base is installed above the base. The gap between the stator coil and the magnet can be adjusted by the screw lift.

[0014] Optionally, the rotating platform can drive the test wheel seat to perform rotational motion at different speeds, and is also electrically connected to a rotation speed measuring device to measure the rotation speed of the test wheel seat.

[0015] Alternatively, the test wheel stand can be driven by inputting three-phase current into the stator coils.

[0016] The technical effects of the present invention are:

[0017] The test device of a permanent magnet linear motor provided by the present invention does not require the construction of a long test track, and occupies a small site; the present invention can approximately simulate the linear motion of the permanent magnet linear motor by adopting a larger rotor test wheel seat, and meet the test research of the permanent magnet linear motor at high speed. The test device of the present invention can drive the rotor test wheel seat through the stator coil, and can also drive the test wheel seat through the rotating platform, and can perform multi-working condition tests on the permanent magnet linear motor, thereby improving the test function of the test device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0020] Figure 1 is a general diagram of a permanent magnet linear motor test device in an embodiment of the present invention;

[0021] Figure 2 is a layout diagram of a stator test bench in an embodiment of the present invention;

[0022] Figure 3 It is a layout diagram of a mover test bench in an embodiment of the present invention;

[0023] Figure 4 is the stator coil arrangement in the embodiment of the present invention; wherein, Figure 4 (a) is the first stator coil arrangement method in the embodiment of the present invention, Figure 4 (b) is a second stator coil arrangement method in an embodiment of the present invention;

[0024] Figure 5 These are three typical arrangements of motor rotor magnets.

[0025] Explanation of the numbers: 1. Base; 2. Screw lift; 3. Linear guide; 4. Sensor mounting frame; 5. Three-force sensor; 6. Coil mounting frame; 7. Mover fixing bracket; 8. Rotating platform; 9. Mover test wheel seat; 10. Permanent magnet; 11. Stator coil. DETAILED DESCRIPTION

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0027] To facilitate understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are given. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0028] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an element in the middle; when an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an element in the middle at the same time; the terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only;

[0029] The words “include,” “including,” “have,” “contain,” etc. used in this article are open-ended terms, meaning including but not limited to.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which the present invention belongs. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0031] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0032] Embodiment 1

[0033] like Figure 1-Figure 5 As shown, in this embodiment, a test device for a permanent magnet linear motor is provided, including a stator test bench and a mover test bench, which can simulate the linear motion of the permanent magnet linear motor by rotational motion; the stator test bench includes a base 1, a screw lift 2, a linear guide 3, a sensor mounting frame 4 and a coil mounting frame 6; the screw lift 2 and the linear guide 3 are both installed above the base 1, the sensor mounting frame 4 is slidably installed above the linear guide 3, and the sensor mounting frame 4 is transmission-connected to the screw lift 2, the coil mounting frame 6 is installed above the sensor mounting frame 4, and a stator coil 11 is installed on the coil mounting frame 6; the mover test bench includes a mover fixing bracket 7, a rotating platform 8 and a mover test wheel seat 9 installed in sequence from bottom to top, the mover test wheel seat 9 and the stator coil 11 are arranged at a preset interval, and a plurality of magnets are continuously laid on the arc surface of the mover test wheel seat 9.

[0034] The present embodiment relates to a test device for a permanent magnet linear motor, which is mainly composed of two parts: a stator test bench and a mover test bench. The stator test bench mainly includes a base 1, a screw lift 2, a linear guide 3, a sensor mounting frame 4, a three-force sensor 5, a coil mounting frame 6 and a stator coil 11, etc., which are used to carry and measure the load from the mover component, and the gap between the mover and the stator can be adjusted as needed. The mover test bench mainly includes a mover fixing bracket 7, a rotating platform 8, a mover test wheel seat 9, a permanent magnet 10, etc., which are used to make the permanent magnet 10 produce a rotational motion to achieve the required speed.

[0035] The test device of this embodiment mainly includes two parts: a stator test bench and a mover test bench. The stator test bench mainly includes a base 1, a screw lift 2, a linear guide 3, a sensor mounting frame 4, a three-force sensor 5, a coil mounting frame 6 and a stator coil 11, etc., which are used to carry and measure the load from the mover component, and can adjust the gap between the arc permanent magnet motor mover and the stator according to the test needs through the screw lift 2 and the linear guide 3, and drive or brake the mover part of the motor. The mover test bench mainly includes a mover fixing bracket 7, a rotating platform 8, a mover test wheel seat 9, a permanent magnet 10 mounting frame, a permanent magnet 10, etc. The rotating platform 8 is used to drive or brake the mover test wheel seat 9, so that the motor mover permanent magnet 10 installed on the mover test wheel seat 9 produces a rotational motion to reach the required speed, or generates a braking force on the moving mover test wheel seat 9 to slow down or stop it. At the same time, it can also generate the load required by the motor during the test. The three-force sensor 5 is used to measure the forces borne by the motor stator in the longitudinal, transverse and vertical directions.

[0036] The permanent magnet 10 of the arc permanent magnet motor is composed of multiple magnets with different magnetic field directions, and the arrangement of the magnets can adopt the Halbach arrangement method or the N and S alternating arrangement method. The permanent magnet 10 is installed along the rotor test wheel seat 9 and laid continuously on the wheel seat arc surface. Figure 5 There are three typical motor rotor magnet arrangements. Figure 5 The arrow in the middle indicates the direction of the magnetic field of the magnet.

[0037] The stator of the circular arc permanent magnet motor adopts an air-core coil or an iron-core coil with concentrated winding, which is laid on an arc-shaped coil mounting frame 6. The stator coil 11 is 3-phase, and the stator coil 11 of the motor is arranged in the order of A+, A-, B+, B-, C+, C-, or in the order of A+, C-, B+, A-, C+, B-. The stator coil 11 can be laid continuously or at a certain distance.

[0038] The stator coil 11 and the rotating platform 8 of the circular arc permanent magnet motor are powered by a set of independent power supplies. The two sets of power supplies can independently drive or brake the mover test wheel seat 9 equipped with the permanent magnet 10 by powering the stator coil 11 or the rotating platform 8. At the same time, both sets of power supplies have a speed adjustment function, which can adjust the running speed of the mover test wheel seat 9. The rotating platform 8 is equipped with a set of speed measuring devices, which can measure the speed of the mover test wheel seat 9.

[0039] A set of linear guide rails 3 is installed between the coil mounting frame 6 and the fixed bracket, the moving slider of the linear guide rail 3 is connected to the coil mounting frame 6, and the track part is connected to the fixed bracket. The screw lift 2 installed on the fixed bracket can adjust the gap between the stator coil 11 and the permanent magnet 10 through the screw to meet various test requirements under different motor gaps.

[0040] The arc permanent magnet motor realizes rotational motion through the permanent magnet 10 on the rotor test wheel seat 9. The permanent magnet 10 is arranged in the circumferential direction and driven by the rotating platform 8 to rotate at different speeds. The stator coil 11 of the motor is a concentrated winding made of 3-phase copper wire or aluminum wire, installed on the arc-shaped coil mounting frame 6, and powered by a variable voltage and frequency power supply to control the rotation speed. The stator coil 11 can move along the linear guide 3, and the gap between it and the permanent magnet 10 can be adjusted by the screw lift 2. The permanent magnet 10 can be arranged in a Halbach array or with alternating N and S poles. Two three-force sensors 5 are arranged on the stator coil 11 support to detect the forces exerted on the stator coil 11 in the three directions of X, Y, and Z. The rotating platform 8 has the functions of adjusting the rotation speed, braking, and speed measurement.

[0041] This embodiment can simulate various operating speeds of the permanent magnet linear motor through the rotational movement of the permanent magnet 10 of the circular arc permanent magnet motor relative to the motor stator, and test the performance at different operating speeds.

[0042] This embodiment uses the rotational motion of the arc permanent magnet motor to simulate the linear motion of the permanent magnet linear motor, thereby solving the problems of high cost and large site required for high-speed testing of the permanent magnet linear motor, which requires the construction of a long track.

[0043] The test device of this embodiment does not need to build a long test track, and the site occupancy is small; by using a larger mover test wheel seat 9, this embodiment can approximately simulate the linear motion of the permanent magnet linear motor, meeting the test research of the permanent magnet linear motor at high speed. The test device of this embodiment can drive the mover test wheel seat 9 through the stator coil 11, and can also drive the test wheel seat through the rotating platform 8, so that the permanent magnet linear motor can be tested under multiple working conditions, thereby improving the test function of the test device.

[0044] The above is only a preferred specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A test device for a permanent magnet linear motor, characterized in that: It includes stator test bench and mover test bench, which can simulate the linear motion of permanent magnet linear motor through rotational motion; The stator test bench comprises a base (1), a screw lift (2), a linear guide rail (3), a sensor mounting frame (4) and a coil mounting frame (6); the screw lift (2) and the linear guide rail (3) are both mounted above the base (1); the sensor mounting frame (4) is slidably mounted above the linear guide rail (3); the sensor mounting frame (4) is transmission-connected to the screw lift (2); the coil mounting frame (6) is mounted above the sensor mounting frame (4); and a stator coil (11) is mounted on the coil mounting frame (6); The mover test bench comprises a mover fixing bracket (7), a rotating platform (8) and a mover test wheel seat (9) which are installed in sequence from bottom to top; the mover test wheel seat (9) and the stator coil (11) are arranged at a preset interval, and a plurality of permanent magnets (10) are continuously laid on the arc surface of the mover test wheel seat (9).

2. A test device for a permanent magnet linear motor according to claim 1, characterized in that: The arrangement of the permanent magnets (10) adopts a Halbach arrangement or an N and S alternating arrangement.

3. A test device for a permanent magnet linear motor according to claim 1, characterized in that: The stator coil (11) is three-phase and includes a plurality of air-core coils or iron-core coils with concentrated windings, and each of the coils is laid on the coil mounting frame (6) at a preset interval.

4. A test device for a permanent magnet linear motor according to claim 1, characterized in that: A plurality of sensors are installed between the sensor mounting frame (4) and the coil mounting frame (6).

5. A test device for a permanent magnet linear motor according to claim 4, characterized in that: The sensor can measure forces in three directions, X, Y and Z, simultaneously.

6. A test device for a permanent magnet linear motor according to claim 1, characterized in that: A sliding block is installed in the linear guide rail (3), and the sensor mounting frame (4) is slidably installed above the linear guide rail (3) via the sliding block.

7. A test device for a permanent magnet linear motor according to claim 1, characterized in that: A lift base (1) is installed on one side of the screw lift (2), and the other side is transmission-connected to the sensor mounting frame (4). The lift base (1) is installed above the base (1), and the gap between the stator coil (11) and the mover permanent magnet (10) can be adjusted by the screw lift (2).

8. The test device for a permanent magnet linear motor according to claim 1, characterized in that: The rotating platform (8) can drive the test wheel seat (9) to rotate at different speeds. The rotating platform (8) is also electrically connected to a rotation speed measuring device, which can measure the rotation speed of the test wheel seat (9).

9. A test device for a permanent magnet linear motor according to claim 1, characterized in that: The test wheel seat (9) can also be driven by inputting a three-phase current into the stator coil (11).

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