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Resonant conversion apparatus with extended hold-up time and method of operating the same

a technology of resonant conversion and extended hold-up time, which is applied in the direction of electric variable regulation, process and machine control, instruments, etc., can solve the problems of irreversible damage, insufficient time for back-end electronic products to react, and increasing demands on the quality of electronic products. , to achieve the effect of prolonging the hold-up tim

Active Publication Date: 2020-09-10
DELTA ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent describes a resonant conversion apparatus that has an extended hold-up time. This means that the apparatus can maintain a stable output voltage for a certain period of time after the input voltage is switched on or off. The apparatus includes a resonant conversion unit, a time-extended unit, and a control unit. The control unit controls the resonant conversion unit and the time-extended unit to achieve this. The technical effect of this invention is to provide a more stable output voltage, which is particularly useful in applications that require a reliable power supply.

Problems solved by technology

In recent years, electronic products have become more and more demanding on the quality of power supplies.
Especially in precision electronic products, irreversible damage may occur when the input voltage is unstable.
On the contrary, if the power converter cannot provide a stable output voltage for a period of time after the input voltage is insufficient, it may easily cause the back-end electronic product to have insufficient time to react, thereby causing loss of data of the electronic product or damage of the electronic product.
In particular, when the input voltage of the power converter is insufficient, the capacity of a bulk capacitor of the power converter would affect the length of the hold-up time of the power converter.
However, since the increased capacity of the capacitor causes the increased volume of the capacitor, the method of increasing the capacity of the output capacitor to provide a longer discharging time causes the size of the power converter to increase, and therefore it is difficult to miniaturize the power converter.

Method used

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  • Resonant conversion apparatus with extended hold-up time and method of operating the same
  • Resonant conversion apparatus with extended hold-up time and method of operating the same
  • Resonant conversion apparatus with extended hold-up time and method of operating the same

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first embodiment

[0020]Please refer to FIG. 2A, which is a block circuit diagram of the resonant conversion apparatus with extended hold-up time according to the present disclosure, and also refer to FIG. 1. The primary side 102 has a switching unit 102-1 and a resonant unit 102-2. The switching unit 102-1 receives the input voltage Vin, and the resonant unit 102-2 is coupled to the switching unit 102-1 and a primary side of the transformer unit 104. The secondary side 106 has a rectifying unit 106-1 and an output capacitor 106-2. The rectifying unit 106-1 is coupled to a secondary side of the transformer unit 104. The output capacitor 106-2 is coupled to the rectifying unit 106-1 and the bridge arm assembly 204 for stabilizing a voltage value of the output voltage Vo. The bridge arm assembly 204 has a first bridge arm 204-1, a second bridge arm 204-2, and an energy-storing capacitor 204-3 coupled in parallel to each other. The first bridge arm 204-1 has a first diode D1 and a first switch S1 connec...

second embodiment

[0025]Please refer to FIG. 2B, which is a block circuit diagram of the resonant conversion apparatus with extended hold-up time according to the present disclosure, and also refer to FIG. 2A. The major difference between the resonant conversion apparatus 1 shown in FIG. 2B and that shown in FIG. 2A is that a resonant unit 102-2′ of the former is a dual-capacitor resonant unit and the resonant unit 102-2 of the latter is a single-capacitor resonant unit. In other words, the single-capacitor resonant unit 102-2 shown in FIG. 2A has only a resonant capacitor C coupled to an upper switch Q1 and a lower switch Q2 of the switching unit 102-1, and a first resonant inductor L1; the dual-capacitor resonant unit 102-2′ shown in FIG. 2B has two series-connected resonant capacitors C1, C2 coupled to the upper switch Q1 and the lower switch Q2 of the switching unit 102-1, and a second resonant inductor L2. In comparison with the single resonant capacitor C, two resonant capacitors C1, C2 are use...

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Abstract

A resonant conversion apparatus with extended hold-up time includes a resonant conversion unit, a time-extended unit, and a control unit. The resonant conversion unit includes a primary side, a transformer unit, and a secondary side. The time-extended unit includes a coil and a bridge arm assembly. When a switching frequency of the primary side is less than a critical frequency, the control unit controls the bridge arm assembly being switched on or switched off so that an output voltage of the resonant conversion apparatus is higher than a predetermined voltage within a hold-up time.

Description

BACKGROUNDTechnical Field[0001]The present disclosure relates to a resonant conversion apparatus with extended hold-up time, and more particularly to a resonant conversion apparatus that its output voltage is higher than a predetermined voltage within a hold-up time.Description of Related Art[0002]The statements in this section merely provide background information related to the present disclosure and do not necessarily constitute prior art.[0003]In recent years, electronic products have become more and more demanding on the quality of power supplies. Especially in precision electronic products, irreversible damage may occur when the input voltage is unstable. Therefore, the requirements of power converters for supplying power are gradually increasing with the popularity of electronic products and their emphasis on power quality. Once the input voltage is insufficient during the power supply of the power converter to the electronic product, it needs to be able to maintain the power...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H02M3/335H02M1/08
CPCH02M3/33576H02M1/08H02M3/33523H02M3/33561H02M1/0058H02M1/0096Y02B70/10
Inventor HUANG, CHIA-HSIONGCHIU, YI-HSUN
Owner DELTA ELECTRONICS INC
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