Low voltage energy saving lamp

Abstract

The invention relates to a low voltage energy saving lamp. A rectification filter circuit, a push-pull circuit and a load circuit are connected to form into the low voltage energy saving lamp; the push-pull circuit comprises a boosted circuit and a common base high frequency oscillation circuit; the common base of the common base high frequency oscillation circuit is connected with a pulse secondary winding; the load circuit comprises a lamp tube, a capacitor C43, an inductor L42, a pulse primary winding T31C which is corresponding to the pulse secondary winding and a boosted secondary winding L41C which is corresponding to two boosted primary windings. The low voltage energy saving lamp has the advantages of solving the problems that the circuit is driven by voltages and accordingly power increase, interference generation and imbalance are easy to be caused to the circuit and enabling driving of a triode to be changed from voltage driving into current driving, collector currents of the triode to be determined by the weight of the loads, the currents to be controlled, the inductance to be not easy to saturate and the circuit not to generate imbalance.

Description

technical field [0001] The invention relates to a lighting fixture, in particular to a low-voltage energy-saving lamp with current drive, circuit balance and cost reduction. Background technique [0002] Low-voltage energy-saving lamps are widely used in remote areas, vehicles, ships, and solar lighting systems. The existing low-voltage energy-saving lamp application circuit is generally a self-excited push-pull inverter circuit (Royer), such as figure 1 As shown, this circuit was first invented and designed by American Royer in 1955, but this circuit has the following disadvantages: [0003] 1. The collector peak current of the transistor is determined by the base voltage and has nothing to do with the size and weight of the load. Even with a light load, the collector current of the transistor will saturate the transformer, resulting in increased power consumption and large ripple voltage and noise in the disturbance. [0004] 2. The circuit is extremely prone to unbalan...

AI Technical Summary

Problems solved by technology

[0007] The invention mainly solves the problems in the prior art that the circuit is driven by voltage, which easily causes increased power consumption, interference, and unbalanced circuit, and provides a low-voltage energy-saving lamp with current drive, circuit balance and reduced cost.

Images