CN2200897Y

CN2200897Y - Quick starter for fluorescent lamp

Info

Publication number: CN2200897Y
Application number: CN 94228149
Authority: CN
Inventors: 高立民
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-03-24
Filing date: 1994-03-24
Publication date: 1995-06-14
Anticipated expiration: 2004-03-24

Abstract

The utility model relates to a quick starter for a fluorescent lamp. The utility model is characterized in that a voltage double rectification type starting method is adopted by the utility model which is not need to preheat a filament. The utility model works in the mode of power saving by the way that a capacitor and an inductor are connected in series. The purpose of the utility model is to provide a starter which is quick start and all can start in lower temperature and lower voltage. The service life of a lamp tube can be extended by using of the starter, and no matter a lamp tube with one end of a filament is broken or both ends of the filament are broken, the lamp tube can be used when the mercury gas can be normally ionized.

Description

Quick starter for fluorescent lamp

The utility model relates to appliance field, a kind of fluorescent lamp starter of definitely saying so.

At present, there is following shortcoming in existing starter:

1, common starter toggle speed is slow, and 20 ℃ of ambient temperatures, when rated voltage was 220V, take-off time was 4 seconds.When on the low side or voltage was on the low side when temperature, take-off was slower, even can not take-off.Because filament of fluorescent lamp is often impacted, fracture of wire is scrapped fluorescent tube to this starter easily when starting.

2, electric ballast formula starter kind is more, but its principle is basic identical.Promptly, produce tens KH by power conversion ₂High-frequency electrical, again by the high frequency transformer boosted voltage, reach the voltage that can make tube starting, though its starting resistor wide ranges, toggle speed is fast, also has certain shortcoming: (1) poor reliability.Because transistor bears overvoltage, the overcurrent impact capacity is poor, damage easily.(2) power output is low, easily makes fluorescent tube not reach nominal brightness.(3) high order harmonic component that produces during its work is to sound, be easy to generate interference as equipment.(4) price is higher, the sexual valence ratio.

3, voltage multiplying rectifier formula starter.The connection of this starter is more, and basic principle is much the same.Promptly use the voltage multiplying rectifier mode to make lamp tube ends voltage reach excitation voltage, light fluorescent tube.Its shortcoming is: what 1. flow through fluorescent tube is pulsating direct current, and fluorescent tube is in single-ended emitting electrons operating state, causes an end to turn black in early days easily.2. in the circuit except that flowing through lamp tube current, also have between capacitor constantly charge and discharge electric current, this electric current fluorescent tube of not flowing through is so power factor is lower.3. can not use the inductance type flow restricter, so power consumption is bigger.

The purpose of this utility model is to provide a kind of startup fast, and temperature and voltage all can start when low, need not give the starter of hot filament.This starter durable, and can make fluorescent tube reach due brightness.

The technical solution of the utility model is achieved in that

Adopt the voltage multiplying rectifier mode when 1, starting, get it and start soon the advantage that the low voltage starting performance is good.For ease of explanation, please referring to the equivalent circuit diagram shown in the figure (2).Its operation principle is: for negative, the lower end is timing on supply voltage, and power supply passes through D ₁To C ₁Charging.The charging result makes VC ₁=

\sqrt{2}

e。When the upper end is positive lower end when negative, VC ₁With supply voltage e superposition, pass through D ₂To C ₂Charging.Make VC ₂=2

\sqrt{2}

E supposes e=220V, then VC ₂=2 *

\sqrt{2}

×220V≈622V。This voltage is enough to excite fluorescent tube to make it conducting.

Adopt electricity-saving type fluorescent lamp power supply circuits when 2, working.This moment, circuit can be simplified to equivalent electric circuit shown in the figure (3).At this moment capacitor C ₁With the current limiting element of inductance series connection as the loop.Can fundamentally improve power factor, reduce reactive loss, reach the purpose of economize on electricity.

The utility model has following beneficial effect:

1. start soon, give electricity just bright; 2. life-span of prolonging lamp tube; This starter does not have extremely tube filament and start to impact, so useful life of prolonging lamp tube greatly.And no matter be an end fracture of wire or the fluorescent tube of two ends fracture of wire, if its mercury gas can also normal electrical from, just can use; 3. efficient height; There is electric capacity to connect during its work, so can improve power factor with Inductive ballast.Economize on electricity is about 20%; 4. simple in structure, reliable, cheap, the cost performance height; 5. improved the power factor of circuit, this is highly beneficial to power supply grid.6. voltage adaptation wide ranges.External voltage changes in 30% scope, and this starter still can normally use.

Figure (1) is the electrical schematic diagram of this starter.

C among the figure ₁, C ₂For starting capacitor; D ₁, D ₂Be common rectifier diode; R ₁Be thermistor; R ₂Be controllable silicon system limit leakage resistance; SCR is an one-way SCR.

Equivalent circuit diagram when Fig. 2 starts for this starter.

Equivalent circuit diagram when Fig. 3 works for this starter.

In conjunction with Fig. 1 working method of the present utility model is done brief description: before the fluorescent tube conducting, silicon controlled is controlled very reverse bias, not conducting. So circuit can be simplified to equivalent circuit shown in Figure 2, fluorescent tube is lighted rapidly. After the fluorescent tube conducting, VC₁Both end voltage descends, and along with the thermistor resistance strengthens, the SCR control electrode potential rises, and rapidly conducting. This moment is because D₁、R ₁Loop current is very little, so just by equivalent circuit work shown in Figure 3. Electric current is through C₁Inductive ballast and fluorescent tube consist of the loop.

In conjunction with Fig. 1 embodiment of the present utility model is illustrated.

All elements all are installed on the bar printing wiring board among the figure.

Start capacitor C ₁One termination power, the other end and thermistor R ₁And rectifier diode D ₂Anode connects.Rectification two poles D ₂Negative terminal joins as the output and the load of starter with after controllable silicon SCK anode is in parallel.

Claims

1, a kind of fluorescent lamp quick starter is by starting electric capacity (C ₁), rectifier diode (D ₁), (D ₂), thermistor (R _T), one-way SCR (SCK), multiplication of voltage capacitor (C ₂) form and it is characterized in that being connected in reverse parallel in rectifier diode (D with an one-way SCR (SCK) ₂) two ends.

2, fluorescent lamp quick starter as claimed in claim 1 is characterized in that terminating at rectifier diode (D with a thermistor one ₁) negative terminal, the other end is connected on rectifier diode (D ₂) anode.

3, fluorescent lamp quick starter as claimed in claim 1 is characterized in that the control utmost point of one-way SCR (SCK) is by current-limiting resistance (R ₁) be connected on thermistor and rectifier diode (D ₁) the tie point place.