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Voltage switching system on movable illuminating lamp

A technology of voltage switching and voltage switching, which is applied in the field of mobile lighting and can solve the problems of large loss and increased cost

Active Publication Date: 2014-11-26
GUANGDONG DP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 2. The output of DC power supply 5 with single switching power supply, the voltage and current required by the LED lamp and the built-in battery are difficult to keep consistent. In this case, the current limiting resistor has to be used to balance. For example: 3W load will cause 1W internal consumption, The loss is very large;
[0005] 3. Because there is a switching power supply to supply power to two loads (LED lights and batteries) at the same time, and internal consumption is added at the same time, it is necessary to use a higher power switching power supply to meet the requirements, which greatly increases the cost

Method used

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  • Voltage switching system on movable illuminating lamp
  • Voltage switching system on movable illuminating lamp
  • Voltage switching system on movable illuminating lamp

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] see figure 1As shown, the present invention provides a voltage switching system used on a mobile lighting lamp, and the voltage switching system is connected with an LED lamp 8 used as a mobile lighting lamp; the voltage switching system includes an EMI circuit 1, a first rectification filter Circuit 2, power conversion circuit 3, second rectification and filtering circuit 4, DC power supply 5, voltage switcher 6, constant current circuit 7, PPM controller 9, undervoltage protection circuit 10, protection circuit 11, battery charging controller 12 and The battery 13, the EMI circuit 1 is connected to the constant current circuit 7 after passing through the first rectification and filter circuit 2, the power conversion circuit 3, the second rectification and filter circuit 4, the DC power supply 5, and the voltage switcher 6 in sequence, and the voltage The switching system is connected to the LED lamp 8 through the constant current circuit 7; the first rectification fil...

Embodiment 2

[0033] see image 3 As shown, the present invention is the same as the first embodiment except that the eighth contact of the changeover switch SW1 is connected to the DC power supply 5 .

[0034] According to the application principle Uo=2.5(1+R7 / R8) of voltage-stabilizing integrated circuit U1, that is, TL431, the fourth resistor R15 can switch between floating and power DC, that is, it can be converted into two different DC voltage outputs.

Embodiment 3

[0036] see Figure 4 As shown, the present invention is the same as the first embodiment except that the eighth contact of the changeover switch SW1 is connected to the other end of the fourth resistor R15.

[0037] According to the voltage-stabilizing integrated circuit U1, that is, the application principle of TL431: Uo=2.5(1+R7 / R8), the fourth resistor R15 can switch between floating and power supply DC and ground, and can be converted into three different DC voltage outputs. .

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Abstract

The invention discloses a voltage switching system on a movable illuminating lamp. The voltage switching system comprises an electromagnetic interference (EMI) circuit, a first rectifying and filtering circuit, a power conversion circuit, a second rectifying and filtering circuit, a direct-current (DC) power supply, a voltage switcher, a constant current circuit, a PPM controller, an undervoltage protection circuit, a protection circuit, a battery charging controller and a battery, wherein the EMI circuit penetrates through the first rectifying and filtering circuit, the power conversion circuit, the second rectifying and filtering circuit, the DC power supply and the voltage switcher and is connected with the constant current circuit; the voltage switching system is connected with a light-emitting diode (LED) lamp through the constant current circuit; the first rectifying and filtering circuit is connected with the power conversion circuit through the PPM controller; the DC power supply is connected with the PPM controller; and the voltage switcher, the battery charging controller and the battery are sequentially connected to form a loop. According to the voltage switching system, the problems of the internal friction and AC / CH / DC independent states can be solved, the cost of the switching power supply is greatly reduced, and the service life of the battery is prolonged.

Description

technical field [0001] The invention relates to the technical field of mobile lighting, in particular to a voltage switching system used in mobile lighting that can increase the service life of batteries and reduce loss and cost. Background technique [0002] At present, in the field of LED mobile lighting, among them, LED lights that can be directly powered by AC alone or powered by a built-in battery generally use the output of a switching power supply single-channel DC power supply 5 in the design of the power supply circuit, and the output end is individually dialed. The AC / DC power supply is switched by using a manual switch, and the built-in battery is directly connected to the DC. This design will cause the following defects: [0003] 1. As long as the AC power supply is turned on, no matter whether the toggle switch of the light is turned to any state, the built-in battery is still charging, which greatly reduces the service life of the battery; [0004] 2. The outp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B37/00
Inventor 卓楚光
Owner GUANGDONG DP CO LTD