Device for supplying power supply loop for control unit

Abstract

The invention provides a device for supplying a power supply loop for a control unit. The device comprises an alternating current input power, the control unit and a loading device, wherein the input end of the control unit is connected with an alternating current first end; the loading device comprises a rectifying circuit, a bypass control circuit and a by-pass switch, and the rectifying circuit is used for rectifying an output signal of the control unit; the bypass control circuit is used for detecting an electric signal in the loading device to generate detection voltage and generating a bypass switch control signal according to the detection voltage; when the by-pass switch responding to the bypass switch control signal is effective, the by-pass switch is switched on, so that the alternating current input power, the control unit and the by-pass switch can form a conducting loop; when the by-pass switch responding to the bypass switch control signal is noneffective, the by-pass switch is switched off, so that the conducting loop is disconnected. The third port of the control unit and an additional conducting wire are not needed, so that the device is beneficial to simplification of the circuits, reduction of the complexity degree of practical engineering construction, and reduction of the cost.

Description

technical field [0001] The invention relates to the power supply technology of a control unit, in particular to a device for providing a power supply circuit for the control unit. Background technique [0002] Lighting systems usually include systems such as general household lighting, commercial lighting, road lighting and landscape lighting. At present, the lighting system of most households in China simply uses a switch to control the on and off of the light, that is, the light has only two states, either on or off. In foreign countries, especially in North American countries, household lighting involves dimming function, that is, the brightness and color of lights can be changed through control units (such as dimmers or control panels) to achieve a certain comfort level. For example, hotels, conference rooms, shopping malls and other occasions often need to control and adjust the lighting. At present, the usual adjustment method is to adjust the brightness of the light...

AI Technical Summary

Problems solved by technology

At present, in practical applications, the power supply of the dimmer or control panel is generally supplied in two ways: the first way is to directly install dry batteries in the dimmer or control panel. In this way, the battery needs to be replaced frequently, which is inconvenient to use and high in cost. ; figure 1 As shown, in the loop formed by the AC input VAC, the dimmer 11 and the lamp 13, by adding a conductive wire 12, a loop is directly formed between the dimmer 11 and the AC input VAC to supply power to the dimmer 11

However, in the actual construction process, the wiring of the connection line 12 is often very long, which makes wiring difficult and increases the cost.

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