Intersegmental dephasing asymmetric six-phase permanent-magnet linear servo-actuator

A permanent magnet linear and servo motor technology, applied in the direction of electrical components, electromechanical devices, electric components, etc., can solve the problems of low product precision, large motor volume, long longitudinal length, etc., to suppress harmonic thrust fluctuations and reduce drive power , Improve the effect of running stability and reliability

Inactive Publication Date: 2007-05-23
SHENYANG POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The existing permanent magnet synchronous linear motors for machine tools adopt measures such as fractional slot modulation. Although it has a significant effect on weakening the end effect of the linear motor and the thrust fluctuation of the cogging effect, it cannot completely eliminate the thrust generated by the end effect of the motor. The impact of fluctuations
Especially for the linear feed system of high-thrust CNC machine tools, the motor is large in size and long in longitudinal length, and many workbenches are driven by multiple motors in parallel, as shown in Figure 1. The existing motor technical measures cannot better eliminate its The impact of the end effect on the thrust fluctuation cannot meet the high-precision requirements of high-end CNC machine tools, resulting in poor working results and low product precision

Method used

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  • Intersegmental dephasing asymmetric six-phase permanent-magnet linear servo-actuator
  • Intersegmental dephasing asymmetric six-phase permanent-magnet linear servo-actuator
  • Intersegmental dephasing asymmetric six-phase permanent-magnet linear servo-actuator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: As shown in Figure 3(a), the two-unit motors adopt 12-slot 13-pole linear motors, which are installed in series. The primary 7 magnetic circuits of the two-unit motors are independent of each other, and there are non-magnetic materials 9 between the segments. The two units The phase shift interval between the corresponding winding axes of the motor is 2kπ-90°, at this time k=7, and the windings 10 of the two unit motors adopt an asymmetrical six-phase winding structure, that is, the three-phase windings of the two unit motors adopt a double-star structure, corresponding to the windings of each phase The phase difference between the axes is 30° electrical angle; the primary 7 of the two-unit motor is installed on the mobile platform 2 together, and placed above the secondary of the permanent magnet to form a whole motor.

[0023] The used lifting motor includes primary iron core, primary winding, stator yoke, permanent magnet, linear guide rail, and machine ...

Embodiment 2

[0030] Embodiment 2: The structure of the unit motor used in this example is the same as that of the unit motor in Embodiment 1. The total number of coils of the unit motor is still 6, but the installation method of the motor is different. As shown in Figure 5, the two unit motors are installed in parallel. The secondary permanent magnet magnetic circuits of the two-unit motors are independent of each other, and are installed in parallel corresponding to the 90° electrical angle of the phase shift. The primary stages of the two-unit motors are installed together on a mover platform, and the axes of the corresponding windings of the two unit motors are coincident, and are respectively placed above the secondary sides of the corresponding permanent magnets.

[0031]After the above design and installation, the windings of the two unit motors can still form the same asymmetrical six-phase winding structure as in Example 1, that is, the three-phase windings of the two unit motors ad...

Embodiment 3

[0036] Embodiment 3: The structure of the unit motor used in this example is basically the same as that of the motor in Embodiment 1, except that the number of coils of the motor winding is different. In this example, the number of winding coils per phase is N i = 3 unit linear motor, its structure schematic diagram is shown in Fig. 6. The specific parameters of the unit motor in this example are as follows: the tooth width of the primary core a=7mm, the slot width b=8mm, the slot height h=25mm, the number of winding coils per phase of the motor N i =3, the number of motor winding phases m=3, the total number of coils of the unit motor N c =mN i =3×3=9; number of primary core slots Q=2N c = 2mN i =18, Electrical angle, equivalent slot pitch angle Electrical angle, slot distance τ y =180°±Δτ y =180°±10°; all the coils of the primary winding of the motor are divided into three symmetrical sections, each section belongs to a phase winding, that is, the relationship bet...

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PUM

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Abstract

The invention relates to an inter-section phase-shift asymmetry six-phase permanent-magnetic straight servo motor, wherein it comprises two unit motors serially or parallel connected; the initial magnetic circuits of said two motors are independent; the section are distanced via non-conductive material; the relative windings or relative second axles of two unit motors are distanced via 2k pi+-90degree, while k is integer; the windings are asymmetry six-phase structure; their initial stages are mounted on movable platform and above the second stage of permanent magnet. The invention can restrain winding harmonic wave of synchronous straight motor, reduce driving power of each phase, and improve the stability of servo controller.

Description

technical field [0001] The invention belongs to the technical field of motors, in particular to an asymmetrical six-phase permanent magnet linear servo motor with inter-segment phase shifting. Background technique [0002] The existing permanent magnet synchronous linear motors for machine tools adopt measures such as fractional slot modulation. Although it has a significant effect on weakening the end effect of the linear motor and the thrust fluctuation of the cogging effect, it cannot completely eliminate the thrust generated by the end effect of the motor. The impact of fluctuations. Especially for the linear feed system of high-thrust CNC machine tools, the motor is large in size and long in longitudinal length, and many workbenches are driven by multiple motors in parallel, as shown in Figure 1. The existing motor technical measures cannot better eliminate its The impact of the end effect on the thrust fluctuation cannot meet the high-precision requirements of high-en...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K16/00H02K41/02H02K41/03H02K3/28H02K3/12
Inventor 夏加宽王成元黄伟周美文
Owner SHENYANG POLYTECHNIC UNIV
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