CN2301831Y

CN2301831Y - Electronic ballast for high pressure sodium lamp

Info

Publication number: CN2301831Y
Application number: CN 97214943
Authority: CN
Inventors: 胡崇武
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-04-17
Filing date: 1997-04-17
Publication date: 1998-12-23
Anticipated expiration: 2007-04-17

Abstract

The utility model relates to an electronic ballast for a high voltage sodium lamp, which is characterized in that a high frequency switch oscillating circuit and a voltage boosting circuit are formed by transistors (BG 1, BG 2), a transformer T1 and a voltage boosting transformer T2, block between the positive end of a high voltage sodium lamp N and a positive electrode of rectification filter output can be realized through a blocking capacitor C8, a relay J is connected with a capacitor C7, the relay J is connected with both ends of the blocking capacitor, contacts of the relay J can be utilized to realized the switching on or off of a protective circuit, and the normal work of a lamp tube can be maintained. The utility model has the advantages of good protection feature, effective protection of unexpected voltage fluctuation, effective protection of lamp tube open circuit, good voltage adaptability, convenient operation, etc.

Description

The high-pressure sodium electronic lamp ballast

The utility model relates to a kind of high-pressure sodium electronic lamp ballast.

The electric ballast of high-pressure sodium lamp use at present; because route protection poor performance; in case fluctuation appears in voltage; after high-pressure sodium lamp is extinguished; when voltage raise once more, high-pressure sodium lamp was a heat pipe can not light once more the time, and ballast breaks down easily; after high-pressure sodium lamp burnt out the formation open circuit, ballast also was out of order easily.

It is good that the purpose of this utility model just provides a kind of protective value, the electronic ballast of high voltage sodium lamp that voltage adaptation is good.

Solution of the present utility model is such; Light high-pressure sodium lamp N by formation switch oscillating circuits such as transistor (BG1, BG2), transformer T1 through transformer T2 output high pressure, use capacitance C8 every straight coupling between the anode of high-pressure sodium lamp N and the rectifying and wave-filtering output plus terminal, relay J and the two ends that are connected on capacitance C8 after capacitor C 7 is connected, starting after capacitor C 6 and the starter BK parallel connection connects with the normally-closed contact of relay J receives the two ends of high-pressure sodium lamp N.

The utility model has the advantages that protective value is good, unexpected voltage fluctuation, fluorescent tube open circuit etc. all can effectively be protected, and voltage adaptation is good, and is easy to use, and power savings is obvious.

Accompanying drawing is embodiment of the present utility model.

Accompanying drawing 1 is an electrical schematic diagram of the present utility model.

The utility model is to constitute the HF switch oscillating circuit by transistor (BG1, BG2), transformer T1 etc., light high-pressure sodium lamp N through transformer T2 output high pressure, between the anode of high-pressure sodium lamp N and rectifying and wave-filtering output cathode with capacitance C8 every straight coupling, relay J and the two ends that are connected on capacitance C8 after capacitor C 7 is connected, starting after capacitor C 6 and the starter BK parallel connection connects with the normally-closed contact of relay J receives the two ends of high-pressure sodium lamp N.

Operation principle of the present utility model is such: behind power supply rectification filter, to capacitor C 2 chargings, VD2 conducting when the voltage of capacitor C 2 reaches the puncture voltage of VD2, transistor BG1, VD2, the switching mode high-frequency oscillating circuits starting of oscillation work that the L1L2 coil of transformer T1 and peripheral cell thereof constitute, VD1 has a voltage through the coil L6 of transformer T1 end simultaneously, resistance R 6 makes transistor BG2 starting of oscillation work, by transistor (BG1, BG2), transformer T1 etc. constitute switching mode high frequency push-pull oscillator circuit, enough operating currents are provided and improve its operating efficiency to step-up transformer T2.Because transformer T1 coil L3 is connected with L6, makes transistor BG2 and peripheral cell thereof constitute preposition promotion and lamp works is played the electric current compensating action.

The height of step-up transformer T2 is sent to high-pressure sodium lamp N; because starting capacitor C 6 links with the relay J normally-closed contact; start capacitor C 6 and get electric charging; when capacitor C 6 both end voltage are enough high, light high-pressure sodium lamp N, there is electric current to flow through high-pressure sodium lamp N; relay J thus electric adhesive; the normally opened contact adhesive of relay J, thus start-up circuit and starter BK protective circuit, high-pressure sodium lamp N operate as normal disconnected.If open circuit situation appears in high-pressure sodium lamp N, because no current flows through relay J, relay J is not worked, the adhesive again of its normally-closed contact, the contact adhesive is lighted in capacitor C 6 chargings until starter BK, form streaming current, power supply to circuit breaker J power supply, makes the relay J adhesive from the two ends of capacitor C 8, after the adhesive once more no current flow through relay J, relay J quits work once more, go down and so forth, repeat closing course repeatedly, light till the fluorescent tube again once more until discharging open fault.

When if high-pressure sodium lamp N extinguishes suddenly because of voltage fluctuation, because fluorescent tube is in hot, can not restrike at once, capacitor C 6 was charged again and was lighted until starter BK this moment, the contact adhesive, form streaming current, power supply is powered to relay J from the two ends of capacitor C 8, make the relay J adhesive, disconnect normally-closed contact after the adhesive, make relay electric-loss once more, normally-closed contact is adhesive once more, capacitor C 6 is charged once more and is lighted until starter BK, repeats above-mentioned closing course repeatedly, until fluorescent tube N be cooled to light again till.

Though owing to the utility model in use as long as any reason of high-pressure sodium lamp N when not lighting, relay J is adhesive repeatedly, until lamp tube starting, when fluorescent tube is not bright, the utility model power consumption is few, and because pair transistor pushes the work forward, sample after tested, the utility model is compared with existing inductance type ballast, economize on electricity about 50%.

The utility model can be used on use in the fluorescent tube lighted of useful ballast.

Claims

1, a kind of high-pressure sodium electronic lamp ballast, be to constitute the HF switch oscillating circuit by transistor (BG1, BG2), transformer T1 etc., light high-pressure sodium lamp N through transformer T2 output high pressure, it is characterized in that between the anode of high-pressure sodium lamp N and the rectifying and wave-filtering output cathode with capacitance C8 every straight coupling, relay J and the two ends that are connected on capacitance C8 after capacitor C 7 is connected, starting after capacitor C 6 and the starter BK parallel connection connects with the normally-closed contact of relay J receives the two ends of high-pressure sodium lamp N.