CN2696092Y

CN2696092Y - Controllable transformer

Info

Publication number: CN2696092Y
Application number: CN 03263723
Authority: CN
Inventors: 徐炳禄
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-05-26
Filing date: 2003-05-26
Publication date: 2005-04-27
Anticipated expiration: 2013-05-26

Abstract

The utility model discloses a controllable transformer whose structure is simple. Voltage and current outputted by the controllable transformer can be continuously and smoothly carried through adjusting from 0 to a maximum outputted value range designed. The utility model is that an enamel covered wire is wound into a solenoid on an annular iron core, a primary coil and a secondary coil are respectively and independently wound, and commercial power is efficiently isolated. The primary coil adopts a single wire which is flatly wound on an inner layer, and the secondary coil adopts multiple wires which are grouped and are orderly wound in parallel. The width of the contact surface of a carbon brush is accurately controlled and is the product of wound wire diameters and combined wire numbers, and in this way, the carbon brush only can contact the width of the combined wire numbers no matter that the carbon brush is adjusted to any positions. Not only the current outputted capability of the controllable transformer is increased, but also the interturn short circuit of the coils absolutely can not be caused. The wire diameters, the turn numbers, and the combined wire numbers of the coils can be conveniently designed according to the requirements of outputted current. The annular iron core which is rolled by a common silicon strip, and a common covered wire are adopted. The controllable transformer has easy material taking, convenient manufacture, and the strong load capacity of the outputted current, and can be extensive used for the electric devices of small and medium size charge, plating, etc.

Description

Controllable transformer

Technical field

The utility model relates to a kind of controllable transformer that can adjust output voltage, electric current by load request.Especially can continuous stepless adjustable, output smoothing be stable, and output fully and mains isolation, and is safe and reliable.Be specially adapted among the power conversion devices such as charging, plating.

Background technology

At present, in various power conversion devices, mostly use transformer to come voltage of transformation, electric current, especially for the rectifying installation of usefulness of charging, plating, because of the needs that load is different are adjusted often to the output voltage electric current.Normally used way is to change the tapped transformer tap with switch to adjust.This way not weak point is that transformer output is jumping characteristic, at interval several volts even tens volts, continuous adjustment that can not be level and smooth, feasible output is accurate inadequately, influence the work effect to some extent, the use carbon brush contact that has is rotated variable autotransformer adjustment civil power and is controlled another transformer as output, reach the purpose of level and smooth adjustment output, but element increases like this, connect numerous and diverse, and after the wearing and tearing of self coupling transformation carbon brush, cause the voltage regulator coil turn-to-turn short circuit easily, cause and burn fault.Also have by electronic control means (for example controllable silicon etc.), reach level and smooth adjustment output, but like that, complex circuit, cost up, failure rate is big.

Summary of the invention

The utility model will provide a kind of controllable transformer exactly, and this transformer control is easy, and output smoothing is simple in structure, is fit to very much middle-size and small-size electric device and uses.

The technical scheme that the utility model adopted is: design on the principle basis of carbon brush contact rotation variable autotransformer.On annular core, with enamelled wire coiled line bag, and be fixed on the base, rotating shaft is equipped with at the base center, and carbon brush arm, carbon brush are housed in the rotating shaft, and carbon brush presses on the coating removal face of the online bag outside, and its sliding scale is 360 °.The independent coiling respectively of primary coil and secondary coil so just unites two into one voltage regulator and transformer.Isolated civil power effectively, can design and produce according to output current neatly.Primary coil adopts single line flat around internal layer, secondary coil adopt multi-thread grouping successively and around, accurately the width of control carbon brush contact-making surface for coiling directly with the product of institute's doubling number, like this, no matter carbon brush transfers to any position, can only contact the width of institute's doubling number, not only increased the electric current fan-out capability of transformer, and can never cause the turn-to-turn short circuit of coil, effectively overcome the numbness disease of the easy turn-to-turn short circuit of common voltage regulator.This key problem in technology just of the present utility model place.

The beneficial effects of the utility model are: can be level and smooth when carbon brush rotates along (contrary) hour hands to designed maximum output valve scope, adjust output from 0, current load ability is strong, isolate civil power, safe, the annular core and the common enamelled wire that adopt the ordinary silicon steel band to be rolled into are made, draw materials easily, simple in structure.

Fig. 1 is the overall schematic of controllable transformer

Fig. 2 be of the present utility model be electrical schematic diagram

Fig. 3 is that the controllable transformer secondary winding launches to contact schematic diagram with carbon brush

1. 2. 3. 4. 5. 6. 7. 8. 9. 10. line bag carbon brush (moving clockwise) signal carbon brush (moving counterclockwise) initial head of signal secondary coil that moves to left that moves to right of coating removal layer contact-making surface of base of annular core of primary coil of insulating material of secondary coil of rotating shaft of carbon brush arm of carbon brush and lead-out wire among the figure.

Embodiment

The utility model is described in further detail below in conjunction with drawings and Examples.

1. carbon brush is fixed on the carbon brush arm and 2. goes up in Fig. 1,3. drives clockwise or rotates in 360 ° of scopes counterclockwise and change contact position and play a part to adjust and export by being connected in rotating shaft that 8. base go up.10. the line bag is fixed on base and 8. goes up, outer upper be wide about 25mm the coating removal face 9., can see by section, the line bag 10. outermost layer be secondary coil 4., be followed successively by insulant 5. primary coil 6. annular core is 7..

By Fig. 3 the working condition of carbon brush and secondary coil group once is described, among Fig. 3 secondary coil be three-way and around, secondary initial head (13) is connected together, then respectively by 1,2,3 numbered packets successively and around, until around intact.Like this, if carbon brush is 1. when a fixed position, the wire size that is contacted is 1 of a c group, 2,3, when moving to right the position of (seeing ) single line at carbon brush, the wire size that is contacted is 2 of a c group, 3 and d group 1, just in time also be that one group of line is 2,3,1, when moving to left the position of (seeing ) single line at carbon brush, the wire size that is contacted be b group 3 and

c group

1,2, just in time still one group of line is 3,1,2, so no matter where carbon brush transfers to, because the width of carbon brush accurately is controlled at the width of three lines, contact is one group of line forever, so will not cause turn-to-turn short circuit, by parity of reasoning no matter institute's doubling number is several, as long as by group successively and around, and the width of accurately controlling carbon brush just can design and produce out suitable controllable transformer by exporting requirement easily and flexibly for institute and coiling footpath and the institute product of number also.

Claims

1, a kind of controllable transformer, on annular core, with enamelled wire coiled line bag, and be fixed on the base, rotating shaft is equipped with at the base center, and carbon brush arm, carbon brush are housed in the rotating shaft, it is characterized in that: the primary coil of line bag and secondary coil are independent separately, the insulating material separator is arranged between two coils, and carbon brush slides with rotating shaft.

2, according to the described controllable transformer of claim 1, it is characterized in that: described line bag, primary coil adopt single line flat around internal layer, and secondary coil adopts multi-thread grouping successively and around skin, and outer upper is the coating removal face about width 30cm.

3, according to the described controllable transformer of claim 1, it is characterized in that: described carbon brush is pressed on the coating removal face of secondary coil outer upper, carbon brush is secondary wire astragal footpath and the product of institute's doubling number along the width of wire-wound direction, and carbon brush can be along the slip of (contrary) hour hands in 360 ° of scopes by rotating shaft.