D.C. power source device

Abstract

The invention relates to a DC power supply device for elevator illumination, comprising step-down rectifier, characterized in that the step-down rectifier is connected with constant current source circuit and illuminating circuit in order, the constant current source circuit is connected of constant current source branch, biasing circuit, constant current failure protection sampling amplifying circuit, and constant current sampling amplifying circuit in order, and the illuminating circuit is connected of at least two LED series circuits in parallel. As compared with the existing technique, because it connects the step-down rectifier with the constant current source circuit and emergency power supply circuit and connects the emergency power supply circuit and PWM step-up constant voltage circuit with overdischange limiting circuits, it can assure elevator safety operation. Thus, it is a DC power supply device applied to elevator cribs.

Description

technical field [0001] The invention belongs to the technical field of direct current power supply, and in particular relates to a direct current power supply device. Background technique [0002] In the prior art, the application of DC power supply has been relatively common, but the existing DC power supply often only plays the role of replacing the battery, and it is difficult to be suitable for occasions that are frequently used and require high stability and reliability. It is one of the basic measures to facilitate the use of elevators by generally setting lights in the bridge compartments for special equipment for going up and down stairs that are frequently used. With the development of the economy and the improvement of living standards, the role of separate lighting for elevator bridge compartments It is no longer suitable for actual use requirements. In daily life, the bridge compartment is already a window to reflect the corporate image and promote corporate prod...

AI Technical Summary

Problems solved by technology

[0002] In the prior art, the application of DC power supply has been relatively common, but the existing DC power supply often only plays the role of replacing the battery, and it is difficult to be suitable for occasions that are frequently used and require high stability and reliability. It is one of the basic measures to facilitate the use of elevators by generally setting lights in the bridge compartments for special equipment for going up and down stairs that are frequently used. With the development of the economy and the improvement of living standards, the role of separate lighting for elevator bridge compartments It is no longer suitable for actual use requirements. In daily life, the bridge compartment is already a window to reflect the corporate image and promote corporate products. However, at present, the bridge compartment is usually illuminated by high-power incandescent lamps, fluorescent lamps and other lamps, which have high energy consumption and long service life. Short, and the use of light-emitting diodes as the lighting device of the elevator bridge compartment has become a development trend. Therefore, the development of a DC power supply device that saves energy, has a long service life, and is suitable for using light-emitting diodes to illuminate the elevator bridge compartment has become a concern of people.

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