CN86211024U

CN86211024U - Linear motor

Info

Publication number: CN86211024U
Application number: CN 86211024
Authority: CN
Inventors: 黄维铭; 林晓鸥; 黄水珍
Original assignee: ANTOMATIZATION INST LUOYANG CITY
Current assignee: ANTOMATIZATION INST LUOYANG CITY
Priority date: 1986-12-30
Filing date: 1986-12-30
Publication date: 1988-02-10

Abstract

The utility model relates to a linear motor, particularly a single-phase alternating current linear induction motor. The primary side of the linear motor is provided with four hollow solenoidal coils. The auxiliary side of the linear motor is an iron core which passes through pores of the hollow solenoidal coils. The four coils are orderly at intervals divided into two groups. Two coils of each group are oppositely connected in parallel. Namely the head and the tail of one coil are respectively connected with the tail and the head of another coil. The two groups of coils are connected with a power cord in parallel after the phases are separated by a capacitance. The efficiency of the single-phase alternating current linear induction motor can be increased by one time and volume can be reduced by a half by adopting the wiring structure.

Description

Linear motor

The invention relates to linear motor, the particularly invention of single-phase AC linear asynchronous motor, the former limit of this motor is made up of several hollow magnetic plugs, and secondary is an iron core that passes hollow magnetic plug mesopore, is surrounded by one deck copper sheet on the iron core.The number of magnetic plug is generally even number, and for single-phase linear asynchronous motor, modal is four magnetic plugs, they respectively are divided into two groups successively, coil in each group is connected in parallel in the same way, and promptly the head of each coil and head are associated in together, and tail and tail are associated in together.The last suitable split-phase capacitor of wherein connecting again behind one group of coils from parallel connection of coils, two groups of coils are parallel on the power line more then.

This straight line electric function is directly changed into electric energy straight-line mechanical energy easily, but its conversion efficiency is not high, and volume is also bigger.

Task of the present invention provides a kind of single-phase AC linear asynchronous motor, and its efficient can double, and volume reduces half.

Its solution is, change original wiring construction, still the motor with four coils is an example, four coils respectively are divided into two groups successively, two coil reverse parallel connections in every group together, promptly the head and tail of a coil links with the tail of another coil and head respectively, in addition, does not do other changes.

Such wiring construction makes the travelling-magnetic-field of linear asynchronous motor more even, thereby the efficient of linear asynchronous motor can be doubled, and volume can dwindle half.

Another improvement of the present invention is the reversing switch back at linear motor, and the PTC element that series connection has positive temperature coefficient plays overload protective function.

Accompanying drawing has been described one embodiment of the present of invention.

What accompanying drawing provided is the winding diagram that the single-phase AC linear asynchronous motor of four coils is arranged.(1), (2) are two reversing switches among the figure, (3), (4) are two PTC elements, (5) be split-phase capacitor, (6), (7), (8), (9) are four hollow magnetic plugs, the be in line former limit of motor of these four coil groups, (10) being iron core, is the secondary of linear motor.A, B, C, D represent the head end of four coils respectively, and W, X, Y, Z represent the tail end of four coils respectively.U is a power supply.

Coil (6) and coil (8) are one group, and coil (7) and coil (9) are one group, and the head end A of coil (6) is associated in the tail end Y of coil (8), the tail end W of coil (6) is associated in the head end C of coil (8), similarly, the B end links with the Z end, and the X end links with the D end.W end and the lower end that is associated in electric capacity (5) after the C end is in parallel, the X end is held the upper end that is associated in electric capacity (5) with D, and all the other four end A, Y, B, Z are connected in parallel.

After Closing Switch (1), coil (7) and coil (9) can be directly electric, and coil (6) and coil (8) will could get by the electric capacity (5) of series connection.Two groups of coils differ 90 ° on electrical degree, so form travelling-magnetic-field between former limit and secondary, at this moment, secondary (10) is walked to the right.Otherwise, after switch (2) closure, coil (6) and coil (8) can be directly electric, and that coil (7) and coil (9) will could get by the electric capacity (5) of series connection is electric, at this moment, secondary (10) is walked left.Certainly switch (1) and switch (2) can not be closed simultaneously.

When any one closure in switch (1) or (2); in PTC element (3) or (4) energising must be arranged; if linear motor overload; the electric current that then flows through this PTC element can make the temperature of PTC element raise; the resistance of PTC element will increase rapidly; electric current is limited on the very little numerical value, thereby plays the effect of overload protection.

The present invention also has a kind of wiring construction of equivalence: four coils respectively are divided into two groups successively, the head and the head end of two coils links in every group, tail and tail end link, but these two coils around to being opposite, exactly because adopt this wiring construction need positive and negative two kinds around to coil, all not too convenient in production technology and production management, thereby not as suggested design.

Claims

1, linear motor, particularly single-phase AC linear asynchronous motor, there are four hollow magnetic plugs on its former limit, and secondary is an iron core that passes hollow magnetic plug mesopore, is surrounded by one deck copper sheet on the iron core.It is characterized in that: four coils respectively are divided into two groups successively, and promptly coil (6) and (8) are one group, and coil (7) and (9) are one group; Two coil reverse parallel connections in every group together, the head end A that is coil (6) is associated in the tail end Y of coil (8), the tail end W of coil (6) is associated in the head end C of coil (8), the tail end Z of the head end B of coil (7) and coil (9) links, and the head end D of the tail end X of coil (7) and coil (9) links; W, C end is connected in the lower end of electric capacity (5), and X, D end is connected in the upper end of electric capacity (5), and all the other four end A, Y, B, Z are connected in parallel.The wiring construction that also has a kind of equivalence in addition: four coils respectively are divided into two groups successively, and the head and the head end of two coils links in every group, and tail and tail end link, still two coils around to being opposite.