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power conversion device

A power conversion and power circuit technology, which is applied in the direction of output power conversion devices, electrical components, and adjustment of electrical variables, can solve the problems of insufficient maintenance time and reduce the stability of electronic devices, etc., and achieve the effect of extending the maintenance time

Active Publication Date: 2022-01-11
ACER INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the existing power conversion device usually has the problem of insufficient maintenance time, which further reduces the stability of the operation of the electronic device.

Method used

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Embodiment Construction

[0047] In order to make the content of the present invention more comprehensible, the following specific embodiments are taken as examples in which the present invention can be implemented. In addition, wherever possible, elements / members / steps with the same reference numerals are used in the drawings and embodiments to represent the same or similar parts.

[0048] figure 1 It is a schematic circuit block diagram of a power conversion device 100 according to an embodiment of the present invention. Please refer to figure 1 , the power conversion device 100 may include a transformer TR, a power switch Q1 , a pulse width modulation signal generator 120 , an energy storage element 140 and a power circuit 160 , but the present invention is not limited thereto. In an embodiment of the present invention, the power conversion device 100 may further include an input capacitor CIN and a rectification circuit 180 .

[0049] The transformer TR has a primary winding Np, a secondary wind...

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Abstract

The invention provides a power conversion device, which includes a transformer, a power switch, a pulse width modulation signal generator, an energy storage element and a power circuit. The primary winding of the transformer receives an input voltage from an external power source. The auxiliary winding of the transformer provides the auxiliary voltage. The power switch is coupled to the primary winding. The pulse width modulation signal generator generates a pulse width modulation signal to control the opening and closing of the power switch. The energy storage element is coupled to the power terminal of the pulse width modulation signal generator. The power supply circuit supplies power to the pulse width modulation signal generator and charges the energy storage element according to the auxiliary voltage. When the voltage of the energy storage element is greater than or equal to the critical voltage, the power supply circuit stores backup power according to the auxiliary voltage. When the external power supply stops providing the input voltage, the power supply circuit supplies power to the pulse width modulation signal generator and charges the energy storage element according to the backup power.

Description

technical field [0001] The invention relates to a power supply device, in particular to a power conversion device capable of extending the maintenance time of output voltage. Background technique [0002] A power conversion apparatus can convert an input voltage provided by an external power supply into a DC voltage suitable for use by various electronic devices. Therefore, the power conversion device is widely used in electronic devices such as computers, office automation equipment, industrial control equipment, and communication equipment. [0003] In a power conversion device based on pulse width modulation (PWM) control, the primary side of the power conversion device usually has a power switch and a PWM control chip. The pulse width modulation control chip is used to control the opening and closing of the power switch, so that the transformer in the power conversion device can transfer the electric energy stored in the primary side to the secondary side of the power c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/335
CPCH02M3/335H02M1/0096
Inventor 詹子增
Owner ACER INC