Automatic discharging circuit for outage of energy storage element and discharging method thereof

A technology of automatic discharge and energy storage components, which is applied in the field of automatic discharge of energy storage components, automatic discharge circuits, and automatic discharge circuits of energy storage components to achieve the effects of ensuring discharge safety, avoiding waste of power consumption, and optimizing equipment performance

Inactive Publication Date: 2014-12-03
山东华芯电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the discharge resistor will produce a constant power loss after the AC power is turned on. Taking the discharge resistor 2MΩ as an example, when the AC input v...

Method used

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  • Automatic discharging circuit for outage of energy storage element and discharging method thereof
  • Automatic discharging circuit for outage of energy storage element and discharging method thereof
  • Automatic discharging circuit for outage of energy storage element and discharging method thereof

Examples

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Effect test

Embodiment 1

[0054] see figure 1 , The present invention discloses an automatic discharge circuit when the energy storage element is powered off. The automatic discharge circuit includes an AC power failure detection unit 1 , a control signal generation unit 2 and a discharge unit 3 that are connected in sequence. In this embodiment, the energy storage element is an X capacitor, of course, it can also be other energy storage elements.

[0055] The AC power failure detection unit 1 is coupled to both ends of the X capacitor through two diodes and a resistor to determine whether the AC power is disconnected; the control signal generation unit 2 is connected to the AC power failure detection unit 1 and the discharge unit 3. If the control signal generation unit 2 obtains the AC disconnection signal from the AC power failure detection unit 1, the control discharge unit 3 discharges the X capacitor.

[0056] see figure 2 In the figure, 101 is an energy storage element, 102 is an automatic di...

Embodiment 2

[0074] The invention discloses an automatic discharge circuit of an energy storage element when power is cut off. The automatic discharge circuit comprises: an AC power-off detection unit, a control signal generation unit and a discharge unit;

[0075] The AC power failure detection unit is used for judging whether the AC power is disconnected; for example, it is judged by two diodes and a resistor (or other elements) coupled to both ends of the energy storage element.

[0076] The control signal generation unit is connected with the AC power failure detection unit and the discharge unit. If the control signal generation unit obtains the AC disconnection signal from the AC power failure detection unit, the control discharge unit discharges the energy storage element.

[0077] In this embodiment, the AC detection unit may include: a half-wave rectification module, two square wave conversion modules, and a pulse signal generation module. The half-wave rectifier module is used to...

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PUM

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Abstract

The invention discloses an automatic discharging circuit for outage of an energy storage element and a discharging method thereof. The automatic discharging circuit comprises alternating current outage detection units, a control signal generation unit and a discharging unit. The alternating current outage detection units are coupled to the two ends of the energy storage element through two diodes and resistors and used for judging whether alternating currents are disconnected. The control signal generation unit is connected with the alternating current outage detection units and the discharging unit and controls the discharging unit to discharge for the energy storage element when obtaining the signal that the alternating currents are disconnected from the alternating current outage detection units. According to the automatic discharging circuit of the energy storage element, the discharging safety of the energy storage element such as a capacitor X can be guaranteed, and power consumption waste caused by a discharging resistor of the energy storage element can be reduced and even avoided.

Description

technical field [0001] The invention belongs to the technical field of electronic circuits, and relates to an automatic discharge circuit, in particular to an automatic discharge circuit of an energy storage element when the power is cut off. Background technique [0002] During the use of household appliances, the X capacitor is usually located between the input terminals of the power supply to filter EMI noise. Because they can store high-voltage electrical energy for long periods of time after an AC power outage, they pose a security threat. [0003] Safety regulations stipulate that the X capacitor must be connected in parallel with a discharge resistor in order to discharge the X capacitor. However, the discharge resistor will generate constant power loss after the AC power is turned on. Taking the discharge resistor of 2MΩ as an example, when the AC input voltage is 250V, the continuous power consumption caused by the discharge resistor is 35mV, which is caused by no-...

Claims

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Application Information

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IPC IPC(8): H02M1/44
Inventor 任永青
Owner 山东华芯电子有限公司
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