CN2233134Y

CN2233134Y - Non-contact frequency-sensing variable resistance starter

Info

Publication number: CN2233134Y
Application number: CN 94208322
Authority: CN
Inventors: 邓泽生; 臧怀沛
Original assignee: SOUTH BRANCH OF DONGBEI HEAVY MACHINERY COLLEGE
Current assignee: SOUTH BRANCH OF DONGBEI HEAVY MACHINERY COLLEGE
Priority date: 1994-04-12
Filing date: 1994-04-12
Publication date: 1996-08-14
Anticipated expiration: 2004-04-12

Abstract

The utility model relates to a non-contact frequency-sensing starter with variable resistances, belonging to the technical field of starting motors or electromechanical transducers. The utility model is characterized in that cylinder iron cores (7) are adopted to be uniformly arranged on the circumferences of a front and a back yoke plates with same diameters (3, 6); radial through grooves (8) are homogeneously arranged on the circumferences of the cylinder iron cores along axis directions; the coils (4) are connected into integration by a wiring terminal (1), etc. Due to the adoption of a novel iron-core structure and the non-contact frequency-sensing starter with variable resistances of a short circuit coil, and thus compared with the old varistors, the utility model has the advantages of low manufacture cost, good starting performance, good running performance, large limit capacity of the starting motor, etc.

Description

The non-contact type frequency-sensitive variable resistance starter

The utility model belongs to starting motor or dynamo-electric converter technical field.

The similar devices that is used to start three-phase winding-type asynchronous motor in the prior art is mounted in the brushless frequency sensitive trheostat (being called for short old-fashioned rheostat) on the motor reel, this old-fashioned rheostat is because its double-layered cylinder structure that adopts unshakable in one's determination, its shortcoming is that structure is comparatively complicated, the diameter of the cylinder of outer iron core can not be done too greatly, (diameter less than 60mm about), thereby make that the starting current of motor is bigger, the power-carrying of starting motor is restricted (motor capacity is less than 150KW).

The purpose of this utility model is to design a kind of novel non-contact type frequency-sensitive variable resistance starter, and this starter is compared characteristics such as have low cost of manufacture, starting and runnability are good with old-fashioned starter, and the power-carrying of starting motor also greatly improves simultaneously.

The non-contact type frequency-sensitive variable resistance starter, comprise binding post (1), nut (2), before, back yoke plate (3,6), cylinder iron core (7), axle sleeve (9), coil compositions such as (4), its main points are: before cylinder iron core (7) is installed in equably, back yoke plate (3,6) on the isodiametric circumference, the quantity of its quantity and binding post (1) is identical, and to be 3～12 can be 3 or 6 or 9 or 12, the circumference upper edge axis direction of cylinder iron core (7) processes some radial grooves 8 with certain width and degree of depth equably, power factor when normally moving in order to improve motor, one or both ends and yoke plate (3 at cylinder iron core (7), the annulus pad (5) that non-magnet material is made is set 6), the axle sleeve (9) that has keyway can make rheostat and rotor coaxial rotation, twining the identical coil of the number of turn (4) on each cylinder iron core (7), binding post (1) is connected into an integral body with these coils (4), and lead-out wire and the coil (4) with the rotor winding links simultaneously.

Further specify below in conjunction with accompanying drawing:

Accompanying drawing 1 is the utility model structure chart

Accompanying drawing 2 is the right view of accompanying drawing

Power factor when normally moving in order to improve motor, can set up short-circuited conducting band at left end or the right-hand member of each cylinder iron core (7) exterior loop (4) position, the number of turn of short-circuited conducting band is 1～40 circle, the material of lead is copper or aluminium, and its sectional area is 1O～1000mm²。

Amount of capacity difference according to actuating motor, the diameter D of cylinder iron core (7) is 10～300mm, the quantity of its groove (8) is 2～30, the width b of groove (8) is 0.5～10mm, degree of depth a is 5～140mm, and (7) material unshakable in one's determination is A₃～No. 60 Steel.

The mid portion of cylinder iron core (7) is cylinder, and the diameter at two ends is littler And be threaded, be fixed on the forward and backward yoke plate (3,6) to use nut (2), Forward and backward yoke plate (3,6) is the annular steel plate. Also install on the front yoke plate (3) Binding post made of copper (1) is arranged, binding post (1) and front yoke plate (3) mutually insulated.

The thickness f that the pad (5) that non-magnet material makes is set between unshakable in one's determination (7) and yoke plate is 0.5～20mm.

Embodiment 1:

Accompanying drawing 1 is the disclosed embodiment of the utility model, this embodiment has six cylinder iron cores (7), be wound with the identical coil of the number of turn (4) on each iron core, six cylinder iron cores (7) use nut (2) to be fixed on equably on the forward and backward yoke plate (3,6) at two ends unshakable in one's determination respectively, the interior circular hole of two yoke plates is used for fixing axle sleeve (9), cylinder core-diameter D=60mm, length L=300mm, 3 grooves are arranged, groove width b=3mm, groove degree of depth a=10mm, core material is No. 45 steel, and this starter can start the 115KW motor.

Embodiment 2:

This embodiment is the novel non-contact type frequency-sensitive variable resistance starter of a starting 380KW motor, it has its core-diameter of six cylinder iron cores (7) D=90mm, length L=350mm, each iron core has 6 grooves (8), the width b=5mm of groove, degree of depth a=15mm, core material are No. 10 steel, unshakable in one's determination near back yoke plate end at each cylinder, it is 150mm that four circle cross sections are housed ²Aluminium matter short-circuited conducting band.

After setting up short-circuited conducting band, the power factor of the normal operation of motor generally can be brought up to about 0.8 by about 0.6.

The foregoing description is good through the field experiment proving effect.

After adopting novel non-contact type frequency-sensitive variable resistance starter, the peak capacity of starting motor can be up to about 1000KW.

New non-contact formula frequency-sensitive variable resistance starter is compared with existing old rheostat , because core construction is simple, be convenient to make, can save core material 50% More than, save machining period about 30%. Concerning motor, adopt novel nothing The motor start-up electric current of contact frequency-sensitive variable resistance starter starting, more same than having The old-fashioned rheostat of size will reduce about 20%, the power of the normal operation of motor Factor improves more, therefore can reduce manufacturing cost and operating cost, gives and makes Producer and applying unit are brought the big economic benefit of tool.

Claims

1, a kind of non-contact type frequency-sensitive variable resistance starter, comprise binding post, nut, before, back yoke plate, the cylinder iron core, axle sleeve, coil, it is characterized in that: before cylinder iron core (7) is installed in equably, back yoke plate (3, on the circumference of same diameter 6), the quantity of its quantity and binding post (1) is identical to be 3～12, axis direction has radial groove (8) equably in the circumference upper edge of cylinder iron core (7), it on their circumferential surface the identical coil of the number of turn (4), binding post (1) is connected into an integral body with these coils (4), lead-out wire and coil (4) with the rotor winding links simultaneously, between the end of cylinder iron core (7) and yoke plate the pad (5) that non-magnet material is made is set.

2, starter according to claim 1 is characterized in that: one end is set up short-circuited conducting band in each cylindrical core (7) coil (4) position, and the number of turn of short-circuited conducting band is 1～40 circle, and the sectional area of lead is 10～1000mm ², the material of lead is copper or aluminium.

3, starter according to claim 1 is characterized in that: the length L of cylinder iron core (7) is 50～800mm, and diameter D is 10～300, and the quantity of groove (8) is 2～30, and the width b of groove (8) is 0.5～10mm, and degree of depth a is 5～140mm.

4, starter according to claim 1 is characterized in that: the thickness f of the pad of non-magnet material (5) is 0.5～20mm.

5, starter according to claim 1 is characterized in that: the material of cylindrical core (7) is A ₃～No. 60 steel.