SU1459580A1 - Method of producing helical magnetic core of electric machine - Google Patents

Abstract

The invention relates to the technology of manufacturing twisted magnetic conductors of electrical machines and can be used in electrical engineering. The invention makes it possible to improve the quality of the manufactured magnetic cores by reducing the size of the work hardening and obtaining accurate geometrical parameters of the magnetic drive. The method is carried out in a follow-up manner. The solid part of the belt is rolled with rotating conic rollers. The parameters of the trapezoidal clearance in the plane passing through the axes of rotation of these rolls are set and fixed so that the outer radius of the pre-rolled tape R, p exceeds a predetermined magnet radius of a certain value depending on the parameters of bending and the properties of the material to be bent. . Then, the outer edge of the tape is brought into contact with the side surface of the roller. Thus, radial forces are applied to the outer edge of the tape, due to reactions at the points of contact with the rollers. When this occurs, the additional bending moment of MDF f acting on the tape in the zone of its exit from the conical rolls. Moreover, the radial forces are transmitted by means of an elastic arm, a portion of the tape. In the event of vibration, in the case of K-p oscillations, the reaction forces at the point of application of the radial force and the value of MDD change accordingly. 1 hp f-ly, 3 ill. 3 4; ate CD SL 00

Description

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The invention relates to the technology of manufacturing twisted magnetic cores of electrical machines and can be used in electrical engineering.

The aim of the invention is to improve the quality of the manufactured magnetic core by reducing the size of the work hardening and obtaining accurate geometrical parameters of the magnetic core.

FIG. 1 and 2 depict a method and scheme for manufacturing a twisted ferrite magnet; in fig. 3 depicts

scheme of preliminary defining ribbons in conic rolls.

The twisted magnets wiring and electrical wiring: is carried out as follows. The solid part of ei-1 with pre-cutting down of the lead pairs is compressed by rotating conical rollers 2 and 3 or cylindrical, set at an angle. The parameters of the trapezoidal gap in the plane passing through the axes of rotation of these rolls are set and fixed so that the outer radius of the previously bent tape R "exceeds the predetermined radius of the magnetic conductor and that the ratio d is ensured; ; -, the outer side surface is free-. But the end is pre-curved. the tapes are brought into contact with the outer surface of the roller 5 to apply a radial force thereto. Lastly, the final bending is performed by an additional moment applied to the pre-deformation zone (A) of the continuous part of the belt 1, and the calibration of the final radius of the Kzhlgi magnetic core forces the force into the pre-deformation zone by means of the elastic arm of the solid part of the OA tape, through which a possible change in B. et al. For example, in the case when R „is more than the allowable value, the reaction force N at point A increases and weishchin replenishing bending moment M. When I is less than the permissible AO. ..imoit.t 1a

1459580

The location of the point of application of the radial force relative to the preliminary deformation zone W is determined experimentally in dependence on the parameters of bending and fixed in the following range: along the tape supply line (0.6-0.95) K, g, g perpendicularity - (0.6-1.00)

ten

t "irzh ftp,

The values are reduced accordingly and as a result, the accuracy of the formation of the spiral of the magnetic circuit is improved.

It was established experimentally that the value of N is significantly less than the radiated pressing force P. Therefore, in order to obtain R and arn °, the proposed method accordingly reduces the power of the drive of the pressing rollers and the amount of work hardening of the crimped part of the tape. Consequently, for the irradiation of the proposed method, the power of the drive for the squeeze rolls and the amount of work-hardening of the crimped part of the tape are respectively reduced.

For example, it is required to fabricate a spiral of the magnetic conductor (101 mm) of the stator of an AI63 asynchronous motor.

ts Manufacturing of stator twisted magnetic circuit is carried out as follows.

in a way.

The width of the rolls 2 and 3 is equal to the height of the solid part of the tape. 20 The initial gap between the minimum roll diameters is set equal to the initial tape thickness. The solid part of the tape 1 is inserted into the trapezoidal gap 4, where it is gripped by the rotating rollers 2 and 3. In the adjustment mode, the arc is pre-bent equal to a quarter of a turn of the helix. The special pattern is made to control the role of R "c. If necessary, a change in the gap between the squeeze rolls establishes th „p from 120 to 123 mm. The position of the squeeze rolls is fixed. The pre-curved tape is brought into contact with the side surface of the rollers 5. Upon reaching-R, the magicians of the axis of the rollers are fixed and then bending is performed in the working mode to ensure accuracy

t 0.5 mm.

The invention allows to improve the quality of the manufactured magnetic circuit.

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Claims (1)

1. A method of manufacturing a twisted magnet of an electrical machine by putting out grooves in a continuous tape forming a helix magnetic circuit including crimping a solid part tape rolls, so that, in order to increase quality by reducing the amount of work hardening and obtaining accurate hermetic parameters of the magnet pipeline, when forming the helix, crimping rollers are carried out with a force that gives the helix radius 0 For example, it is required to fabricate a spiral of the magnetic conductor (101 mm) of the stator of an AI63 asynchronous motor. s The manufacture of a stator twisted magnetic circuit is carried out as follows. in a way. The width of the rolls 2 and 3 is equal to the height of the solid part of the tape. 0 The initial gap between the minimum roll diameters is set equal to the initial tape thickness. The solid part of the tape 1 is inserted into the trapezoidal gap 4, where it is gripped by the rotating rollers 2 and 3. In the adjustment mode, the arc is pre-bent equal to a quarter of a turn of the helix. The special pattern is made to control the role of R "c. If necessary, a change in the gap between the squeeze rolls establishes th „p from 120 to 123 mm. The position of the swage rolls is fixed. The pre-curved tape is brought into contact with the side surface of the rollers 5. Upon reaching-R, the rollers of the axis of the rollers are fixed and further bending is performed in the working mode to ensure accuracy within t 0.5 mm. The invention allows to improve the quality of the manufactured magnetic circuit. 35 40 45 Formula of gaining 1. A method of manufacturing a twisted magnetic circuit of an electrical machine by cutting out grooves in a continuous tape and forming a spiral of a magnetic circuit, including crimping a solid part tape rolls, with the fact that, in order to increase quality by reducing the size of work hardening and obtaining accurate hermetic parameters of the magnetowire, when forming a helix, the squeezing of the tape by rolls is carried out by the force that leads to obtaining the helix radius .f /. (pic 2