CN201256477Y

CN201256477Y - DC electricity supply energy saving lamp

Info

Publication number: CN201256477Y
Application number: CNU2008201641440U
Authority: CN
Inventors: 曹锡行; 李庆明; 严敏杰
Original assignee: Individual
Current assignee: HANGZHOU KEMEI LIGHTING CO Ltd
Priority date: 2008-09-18
Filing date: 2008-09-18
Publication date: 2009-06-10
Anticipated expiration: 2018-09-18

Abstract

The utility model relates to the lighting lamp field and provides a direct current supply energy-saving lamp. A power polarity reversed protecting and current-limiting circuit (1), a DC/AC inverting circuit (2) and an output circuit (3). The direct current supply energy-saving lamp solves the problem that the current energy-saving lamp can only use direct current supply and cannot use under the condition of direct current supply, which can use under the condition of direct current supply and has the advantages of simple structure and convenient utilization.

Description

A kind of direct current supply electricity-saving lamp

Technical field

The utility model relates to the illuminating lamp field, relates in particular to a kind of electricity-saving lamp of direct current supply.

Background technology

Energy shortage is the hot issue of the world today, and electricity-saving lamp in illuminating industry is because multiple advantages such as its efficient, energy-saving and environmental protection, long-life are to replace the energy consumption height, the first-selection of the traditional lighting lamp that the life-span is short.Electricity-saving lamp in the market all is could use by Alternating Current Power Supply, and direct current supply can not be used, and so just exists some to use galvanic place can't use the situation of electricity-saving lamp.

Summary of the invention

Goal of the invention of the present utility model is in order to solve the technical problem that existing electricity-saving lamp exists, a kind of electricity-saving lamp that uses by direct current supply to be provided.

In order to realize above-mentioned purpose, the utility model has adopted following technical scheme:

A kind of direct current supply electricity-saving lamp is provided with electric power polarity and connects anti-protection and current-limiting circuit, DC/AC inverter circuit and output circuit in the described electricity-saving lamp; Described electric power polarity connects anti-protection and current-limiting circuit by the choke L1 of the sudden change that is used for the control circuit electric current be used for the fast recovery diode D3 that the DC power supply input connects anti-protection and constitute; Described DC/AC inverter circuit is made of the elementary winding of R1, R2, Q1, Q2, C1 and transformer L, the anode of direct voltage is directly delivered to the elementary winding of transformer L, the primary winding coil two ends are connected with the collector electrode of switching transistor Q1, Q2 respectively, the equal ground connection of the emitter of Q1, Q2; Described output circuit constitutes the capacitor C 2 of lamp current near sinusoidal ripple by secondary winding and the filtering residue harmonics of transformer L, and the secondary main winding two ends of transformer L produce alternating voltage and light fluorescent tube.

A kind of direct current supply electricity-saving lamp by the technique scheme design, solved existing electricity-saving lamp and can only use the problem that under situation, to use by Alternating Current Power Supply in direct current supply, can under the situation of direct current supply, use, have advantage simple in structure, easy to use simultaneously.

Description of drawings

Fig. 1: the theory diagram of the utility model embodiment.

Fig. 2: the circuit diagram of the utility model embodiment.

Embodiment

Below in conjunction with Fig. 1, Fig. 2 present embodiment is described in detail.

A kind of as shown in Figure 1 and Figure 2 direct current supply electricity-saving lamp is provided with electric power polarity and connects anti-protection and current-limiting circuit 1, DC/AC inverter circuit 2 and output circuit 3 in the electricity-saving lamp.

Electric power polarity connects anti-protection and current-limiting circuit 1 by the choke L1 of the sudden change that is used for the control circuit electric current be used for the fast recovery diode D3 that the DC power supply input connects anti-protection and constitute; in this circuit; the effect of choke L1 is the sudden change of control circuit electric current, for the steady operation of late-class circuit provides safeguard.Because diode has unidirectional on state characteristic, fast recovery diode D3 plays the DC power supply input and connects anti-protection.

DC/AC inverter circuit 2 is made of the elementary winding of R1, R2, Q1, Q2, C1 and transformer L, the anode of direct voltage is directly delivered to the elementary winding centre cap of transformer L, the primary winding coil two ends are connected with the collector electrode of switching transistor Q1, Q2 respectively, the equal ground connection of the emitter of Q1, Q2 (power cathode).The auxiliary winding of transformer L provides necessary positive feedback driving Q1, and Q2 takes turns conducting.Is opposite to the Q1 collector electrode with direction to the alternating current of Q2 collector electrode by the elementary winding centre cap of L.Q1, vibration forms an alternating current in the elementary winding of transformer L thereby the Q2 transistor takes turns the conducting generation.

Output circuit 3 constitutes the capacitor C 2 of lamp current near sinusoidal ripple by secondary winding and the filtering residue harmonics of transformer L, utilize the mutual inductance effect of transformer L, produce very high alternating voltage at the secondary main winding two ends of transformer L and light fluorescent tube, transformer L places between main power source and the fluorescent tube, not only have the power transfer function, but also play buffer action.In the starting stage that power supply applies, fluorescent tube is high impedance status, and the transformer output current is only by two Filament Winding, the filament of capacitor C 2 and lamp tube ends, use as a lamp bright after, fluorescent tube presents the low-resistance conducting state.In the lamp ignition procedures, two Filament Winding play the filament pre-heating effect and prolong burn-out life, but capacitor C 2 filtering residue harmonics make lamp current near sinusoidal ripple.

Above-mentioned only is preferred embodiment of the present utility model, and all equalizations of being done according to the utility model claim change and modify, and all should belong to the covering scope of the utility model patent.

Claims

1, a kind of direct current supply electricity-saving lamp is characterized in that being provided with in the described electricity-saving lamp electric power polarity and connects anti-protection and current-limiting circuit (1), DC/AC inverter circuit (2) and output circuit (3); Described electric power polarity connects anti-protection and current-limiting circuit (1) by the choke L1 of the sudden change that is used for the control circuit electric current be used for the fast recovery diode D3 that the DC power supply input connects anti-protection and constitute; Described DC/AC inverter circuit (2) is made of the elementary winding of R1, R2, Q1, Q2, C1 and transformer L, the anode of direct voltage is directly delivered to the elementary winding of transformer L, the primary winding coil two ends are connected with the collector electrode of switching transistor Q1, Q2 respectively, the equal ground connection of the emitter of Q1, Q2; Described output circuit (3) constitutes the capacitor C 2 of lamp current near sinusoidal ripple by secondary winding and the filtering residue harmonics of transformer L, and the secondary main winding two ends of transformer L produce alternating voltage and light fluorescent tube.