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Power protection device

A technology for power protection and protection modules, which is applied in the direction of emergency protection circuit devices, electrical components, etc., and can solve problems such as driver damage

Active Publication Date: 2012-08-29
INVENTRONICS HANGZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the actual operation process, the user may mistakenly connect the built-in drive whose input power is a low-voltage DC power supply to the AC mains grid, which may cause damage to the drive

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] see image 3 , which is a structural diagram of an embodiment of a power protection device of the present application, including an overvoltage detection module 301, a current limiting module 302, a control switch 303, a capacitor 304 and a protection module 305, wherein,

[0041] The two input terminals of the overvoltage detection module 301 are respectively connected to the positive terminal and the negative terminal of the input power supply, and the output terminal is connected to the control terminal of the control switch 303, so that when the voltage between the two input terminals of the overvoltage detection module 301 is greater than During the first threshold, the control switch 303 is closed, otherwise, the control switch is disconnected;

[0042] One end of the current limiting module 302 is connected to the positive end of the input power supply and serves as the positive input end of the driver, and the other end is connected to one end of the control swi...

Embodiment 2

[0054] see Figure 5 , which is a structural diagram of another embodiment of the power protection device of the present application, wherein the overvoltage detection module includes: a diode D1, a resistor R1, a voltage regulator D2 and a voltage regulator D3, and the current limiting module includes: a resistor R2, a control The switch is a MOS transistor S1, and the protection module is a thyristor S2. Among them, the anode of the diode D1 is connected to the positive terminal of the input power supply, the cathode is connected to one end of the resistor R1, the other end of the resistor R1 is connected to the cathode of the regulator D2, and the anode of the regulator D2 is respectively connected to the grid of the MOS transistor S1 and The cathode of the regulator tube D3 is connected, the anode of the regulator tube D3 is connected to the negative terminal of the input power supply, one end of the resistor R2 is connected to the positive terminal of the input power supp...

Embodiment 3

[0063] see Figure 8, which is a structural diagram of another embodiment of the power protection device of the present application, wherein the overvoltage detection module includes: diode D1, resistor R1, voltage regulator tube D2, resistor R3 and diode D4, and the current limiting module includes: diode D1 and The resistor R2, the control switch is a triode S3, and the protection module is a thyristor S2. The anode of the diode D1 is connected to the positive terminal of the input power supply, the cathode is connected to one end of the resistor R1, the other end of the resistor R1 is connected to the cathode of the voltage regulator D2, and the anode of the voltage regulator D2 is respectively connected to the base of the triode S3 and the resistor R3 One end of the resistor R3 is connected to the cathode of the diode D4, the other end of the resistor R3 is connected to the anode of the diode D4, the anode of the diode D1 is connected to the positive end of the input power...

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PUM

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Abstract

The embodiment of the application discloses a power protection device, which comprises an over-voltage detecting module, a current-limiting module, a control switch, a capacitance and a protection module, wherein two input ends of the over-voltage detecting module are respectively connected with a positive end and a negative end of an input power, and an output end is connected with a control endof the control switch; one end of the current-limiting module is connected with the positive end of the input power and serves as a positive input end of a driver, and the other end of the current-limiting module is respectively connected with one end of the control switch and one end of the capacitance; the other ends of the control switch and the capacitance are grounded; and a first end of theprotection module is grounded, the control end is connected with one ungrounded end of the capacitance, and a second end serves as a negative input end of the driver. According to the embodiment of the application, the damage of the driver can be prevented when a subscriber connects a built-in driver of which the input power is a low-voltage DC power in the AC commercial power network by mistake.

Description

technical field [0001] The application relates to a driving power supply, in particular to a power supply protection device. Background technique [0002] A traditional lighting system composed of LEDs (Light Emitting Diodes, light emitting diodes) usually uses a built-in driver to provide driving power for each LED, and the input power of the built-in driver is AC mains voltage. see figure 1 , which is a structural schematic diagram of an LED lighting system in the prior art. Such as figure 1 As shown, in this lighting system, since the power supply of the LED driver comes from the AC grid voltage, the requirements for the insulation and fire resistance of the entire lighting system are relatively high. In order to meet the insulation and fire resistance of the entire lighting system Sexual requirements, need to pay a higher cost. [0003] In order to reduce costs, the input power of the built-in driver can be changed to a safe low voltage isolated from the AC mains gri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H11/00
Inventor 葛良安华桂潮姚晓莉
Owner INVENTRONICS HANGZHOU