CN2427946Y - Self-ballast and compact type energy-saving lamp - Google Patents

Abstract

A self-ballasted compact fluorescent lamp for lighting. In the existing lamp body, the energy-saving fluorescent lamp tube is electrically connected with a high-frequency electronic ballast, and the high-frequency electronic ballast is electrically connected to the metal lamp cap on the lamp body through wires. A group of passive harmonic suppression circuits is added to the electronic energy-saving lamps with connection structure, so that the passive harmonic suppression circuits are respectively connected to the AC input and DC output terminals of the bridge rectifier circuit in the high-frequency electronic ballast. After the mains is connected to the lamp head, the energy-saving fluorescent lamp will be lit immediately to emit light, and the light efficiency is high, and the power factor can reach more than 0.9.

Description

From the ballast compact type energy-saving lamp

The utility model relates to a kind of illumination electricity-saving lamp, especially adopt the passive filtering mode and make power factor reach low distortion more than 0.9 from the ballast compact type energy-saving lamp.

At present, general electricity-saving lamp is constructed by two classes: a class is an inductive choke coil formula electricity-saving lamp, it mainly is to be made of energy-saving fluorescent lamp, inductance type ballast and starter, by the moment break-make and produce high pressure at the inductance coil two ends and excite lamp lighting-up luminous of starter, be characterized in that the volume of inductance type ballast is big, Heavy Weight, consumptive material is many, power factor is low.Another kind of is the electronic type electricity-saving lamp, wherein have two kinds again: a kind of is the simple type electronic energy-saving lamp, it mainly is made up of current rectifying and wave filtering circuit, high-frequency oscillating circuits and energy-saving fluorescent lamp, the high frequency voltage that produces by high-frequency oscillating circuits comes lamp lighting-up luminous, be characterized in that circuit is simple, the humorous stream of high order that high-frequency oscillating circuits produces is easy to seal in electrical network, influences power grid security, and power factor is low, harmonic content is big, current distortion is serious; Another kind is the high-performance electronic electricity-saving lamp, it mainly suppresses circuit, high-frequency oscillating circuits and energy-saving fluorescent lamp by high-frequency filter circuit, current rectifying and wave filtering circuit, active harmonics and forms, be characterized in that suppressing circuit by high-frequency filter circuit and active harmonics comes the filtering high order harmonic component, improve power factor and reduce current distortion, the circuit complexity, components and parts are many, cost is higher.

The purpose of this utility model provides a kind of from the ballast compact type energy-saving lamp, and not only cost is low for it, saves energy, but also can suppress high order harmonic component, raising merit factor, reduction current distortion effectively, and is easy to utilize and universal.

The purpose of this utility model is achieved in that in lamp body, energy-saving fluorescent lamp and high-frequency electronic ballast are electrically connected, high-frequency electronic ballast and metallic lamp holder are electrically connected, ac input end and dc output end at the bridge rectifier of high-frequency electronic ballast add passive high harmonic inhibition circuit respectively, wherein add a Г type LC passive low ventilating filter and seal in the high order harmonic component that exchanges then in order to filtering circuit at ac input end, and be provided with one at ac input end and exchange virtual earth, a node of the fluorescent tube output loop of high-frequency oscillating circuits is connected on this interchange virtual earth simultaneously, in order to eliminate in the circuit high order harmonic component the influence of ac input end; Dc output end at the bridge rectifier of high-frequency electronic ballast adds a low pass filter of being made up of filter inductance and isolating diode, is used for suppressing high order harmonic component in the circuit to interchange influence then.Harmonic wave by this structure suppresses circuit, reaches the purpose of filtering high order harmonic component, raising power factor, reduction current distortion.

Owing to adopt such scheme, the performance of lamp is greatly improved, and circuit structure is simple, the components and parts number is few, cost is low, be easy to produce and apply, the compact structure of whole lamp body and circuit is being installed and is being used also simple and convenient.

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

Accompanying drawing is circuit theory diagrams of the present utility model.

Among the figure: LAMP is an energy-saving fluorescent lamp, and BX is a fuse, and RT is a semistor, and DB is a bidirectional diode; In the label of combination of numbers: T is a field effect transistor, and R is a resistance, and C is an electric capacity, and D is a diode, and L is an inductance coil.

In the drawings, after the 220V alternating current inserts lamp, the at first full-wave bridge rectifier circuit rectification of forming through D1-D4, alternating current is converted to the direct current of pulsation, then through the L1 choked flow, the D5 isolation rectification, provide dc supply for high-frequency oscillating circuits behind the C4 smothing filtering, L0 at ac input end, C1, C2, the low pass filter that C3 forms is inoperative to the alternating current of 50HZ, only the high order harmonic component composition that flows in the circuit is played the choked flow filter action, wherein, L0, C1 forms the Г mode filter, C2 with capacity, C3 is in series and is attempted by the two ends of AC power, forms one at its tie point place and exchanges virtual earth; R1-R6, C5-C10, D6-D11, L2-L5, T1, T2, DB, Rt and fluorescent tube constitute the high-frequency oscillating circuits of electric ballast together, wherein, R1 is a discharge resistance, R2, C5, C6, DB, R3 constitute the circuits for triggering that shake that open of oscillating circuit, R2 is a current-limiting resistance, C5, C6 constitute voltage divider, and DB is a trigger tube, and R3 is that the grid of T2 triggers current-limiting resistance; T1, T2, D6-D9, R5, R6, L2-L4 constitute the push-pull type oscillating circuit, wherein, R5, R6 are the grid current-limiting resistance of field effect transistor, voltage stabilizing didoe D6 and D7, D8 and D9 differential concatenation respectively are connected on the grid of two field effect transistor in order to increase stability and to protect field effect transistor, L2, L3, L4 form pulse transformer, for oscillating circuit provides polar switching voltage; R4, C7 are the protective circuit of oscillating circuit; L5, D10, D11, C8, C9, C10, Rt constitute the output circuit of electric ballast, wherein, L5 is a high frequency choke coil, Rt is a semistor, for filament provides the startup preheat curent, C10 is a resonant capacitance, D10, D11, C8, C9 form bleeder circuit on the one hand, be back to the loop node of oscillating circuit on the other hand again as the high-frequency current of load lamp, for avoiding high order harmonic component that high-frequency oscillating circuits produces to electric network influencing, this node links together with the virtual earth that exchanges of ac input end.Two high-power switch tube T1, T2 should select MOS type insulated gate N channel field-effect pipe for use.After oscillating circuit obtains working power, begin to open and shake, producing high-frequency resonant voltage at capacitor C10 two ends lights lamp lighting-up, in this moment circuit in the oscillation circuit of forming with T1, T2 respectively by C8, C9, C10, fluorescent tube, L4, L5, because L4 is to the effect of L2, L3, make T1 and T2 take turns conducting and ending, high-frequency resonant takes place, and under the effect of the higher-order of oscillation electric current lamp is worked reliably.The high order harmonic component of oscillating circuit generation simultaneously can be by being back on the formed interchange virtual earth of ac input end C2, C3 by the formed node of C8, C9 in the oscillation circuit, at this moment, for the 50Hz alternating current of input, the high order harmonic component composition is a ground connection, can not influence AC power.On the other hand, flow into a part of high order harmonic component composition in the circuit work power, because the buffer action of D5, add the choked flow of L1, controlled the influence of high order harmonic component again further to ac input end, a part seals in the high order harmonic component of ac input end again can be by the formed Г type of L0, C1 low pass filter filters out, thereby make the higher harmonic components in the circuit be reduced to minimum to the influence of AC network, make the combination property of overall lamp can greatly improve under the condition of not using active harmonics inhibition circuit, the power factor of lamp can reach more than 0.9.

Claims (3)

1. A self-ballasted compact fluorescent lamp. In the lamp body, the energy-saving fluorescent tube is electrically connected to the high-frequency electronic ballast, and the high-frequency electronic ballast is electrically connected to the metal lamp cap. It is characterized in that: A passive harmonic suppression circuit is added to the AC input and DC output of the bridge rectifier circuit of the rectifier. 2. The self-ballasted compact fluorescent lamp according to claim 1, characterized in that: the harmonic suppression circuit at the AC input end of the bridge rectifier circuit is composed of an inductor (L0) and capacitors (C1, C2, C3), wherein , L0, C1 form a Г-type LC low-pass filter, C2, C3 are connected in series to form an AC virtual ground at its connection point; the harmonic suppression circuit of the DC output end of the bridge rectifier circuit is composed of a filter inductor (L1) and isolation Composed of diodes (D5), one end of the filter inductor (L1) is connected to the positive pole of the bridge rectifier circuit, the other end is connected to the negative pole of the isolation diode (D5), and the positive pole of the isolation diode (D5) is connected to the positive terminal of the power supply of the circuit. 3. The self-ballasted compact fluorescent lamp according to claim 1, characterized in that: in the high-frequency oscillating circuit, a node of the lamp output loop formed by capacitors C8 and C9 is simultaneously connected to the node connected by C2 and C3 And the exchange virtual ground formed.

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