CN2091054U

CN2091054U - Induction ballast

Info

Publication number: CN2091054U
Application number: CN 91202142
Authority: CN
Inventors: 朱泰生; 朱卫; 朱史利; 朱史胜
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-02-02
Filing date: 1991-02-02
Publication date: 1991-12-18

Abstract

The utility model relates to the improvement of the structure of an inductance type ballast. The utility model is characterized in that a circle arc air gap is formed at the connection point of the U-shaped shell part of a shell type iron core and a T-shaped tongue centre. The utility model adopts computer-aided design, and has the advantages of reasonable structure, low cost and economy. The inductance type ballast is without increasing equipment, altering prime processes and altering used raw materials, only needs to change silicon steel sheet trimming dies and framework dies, can saves coppers and steels with good economical benefits under the condition of keeping prime quality or improving a little.

Description

Induction ballast

The present invention relates to the improvement of gaseous discharge lamp with the inductance type ballast structure.

Inductance type ballast is made of parts such as winding, skeleton, iron core, base plate, insulating barrier, patch bays.In existing technology, structure unshakable in one's determination has: (A) core formula iron core; (B) shell-type iron core; (C) having the shell-type iron core in fixed air crack, is a kind of improvement of shell-type iron core; (D) the shell-type iron core of being made up of the U-shaped shell portion and the T shape tongue heart is that the another kind of shell-type iron core improves, and leakage field, noise are all less.

Above-mentioned (A), (B), (C) three kinds of core constructions have reflection in " motor engineering handbook " the 6th volume.(D) planting the ballast that core construction sells on market in recent years can see.

More than a common drawback of various core constructions, be that raw materials consumption is bigger, from the overall structure of ballast, do not reach most economical requirement.

Current in the inductance type ballast production technology a vital problem be how to reduce production costs.By cost accounting as can be known, the expense of silicon steel sheet and enamelled wire accounts for 67% of complete cost expense, accounts for 86% of fee of material, and as seen, the key that reduces production costs is to reduce the consumption of silicon steel sheet and enamelled wire.

The purpose of this utility model provides a kind of new core construction, to reach using under the condition that raw material are constant, product quality is qualified, reduces production costs.

The purpose of this utility model is achieved in that the shape of improvement lamination and the overall structure of ballast, gives the alap optimization structure of expense of send as an envoy to silicon steel sheet and enamelled wire.The shell-type iron core is made up of the U-shaped shell portion and the T shape tongue heart, and U-shaped shell portion links to each other with the T shape tongue heart and forms the air gap place, is a bent limit.

Air gap is an arc shaped slits, and its advantage is to make the magnetic flux distribution at air gap place even, thereby under the situation that iron loss allows, can improve the design load of magnetic flux density.Computing formula by umber of turn N:

N=(45 * U _B)/(B _mS) * 10 ⁴(circle)

As can be known, peakflux density B _mRaising, mean and under the condition of same area of core section S, can reduce the value of umber of turn N, promptly reduce the consumption of enamelled wire.

Compare with existing structure, the utility model has the advantages that: do not need increase equipment, do not change former technical process, do not change employed raw material, as long as change silicon steel sheet punch die and skeleton mould, just can keep the product initial quality or make under the situation that quality slightly improves saving copper and steel, reduce cost, economic benefit is considerable.

Below in conjunction with accompanying drawing the utility model is further specified.

Accompanying drawing is the shape figure of lamination.Among the figure 1, the garden arc air gap that forms of the T shape tongue heart 3, shell portion and the tongue heart junction of the U-shaped shell portion 2 of shell-type iron core, shell-type iron core.

At given specification, quality requirement and select for use under the condition of given material, the consumption of required silicon steel sheet and enamelled wire is also relevant with the overall structure of ballast.Adopt computer-aided design, make overall structure the most reasonable, most economical.

The iron core of this structure also can be made and has fixing air gap.

Embodiment:

Choose * * 40W fluorescent lamp ballast that factory produces opposes than test, and the key technical indexes and expense are as follows:

Project	The contrast ballast	Adopt the utility model structure
			Operating current (peace)	0.42	0.42
Noise-measuring (decibel)	32	32
			Power consumption (watt)	7.9	7.8
Normal running conditions lower coil temperature rise (degree)	55	56
			Normal running conditions lower casing temperature rise (degree)	45	43
The silicon steel sheet trade mark, unit price (unit/ton)	D22,2200
			Enamel-cover garden copper cash specification, unit price (unit/kilogram)	QZ-1,26.5
Save silicon steel sheet (gram)	21
			Save enamel-cover garden copper cash (gram)	13.6
Each ballast economical with materials is taken (unit)	0.41

Claims

1, a kind of inductance type ballast has winding, skeleton, iron core, it is characterized in that the shell-type iron core is made up of the U-shaped shell portion and the T shape tongue heart, and shell portion links to each other with the tongue heart and forms the air gap place, is a bent limit.

2, inductance type ballast according to claim 1 is characterized in that the bent limit of shell portion unshakable in one's determination and tongue heart junction being the garden arc.