Wide-voltage-range output current feed converter

A technology of output current and converter, which is applied in the field of converters, can solve the problems of switching loss, rectifier diode reverse recovery loss, increased drive loss, PFM topology is not applicable, and affects converter efficiency, etc., to improve power density and efficiency Effect

Inactive Publication Date: 2020-02-14
SHENZHEN ACAD OF AEROSPACE TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the output voltage range is wide, the switching frequency adjustment range is extremely wide, especially at high frequencies, the switching loss, rectifier diode reverse recovery loss, driving loss, etc. increase sharply, seriously affecting the converter efficiency, so the PFM topology is not Suitable for occasions with a wide output voltage range

Method used

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Examples

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Embodiment Construction

[0023] The preferred embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0024] like Figure 1 to Figure 4 As shown, this example provides a wide voltage range output current-fed converter, including: a primary side power circuit 1, a first secondary side rectifier circuit 2, a second secondary side rectifier circuit 3 and a switch circuit 4. The side power circuit 1 is connected to the first secondary side rectifier circuit 2 and the second secondary side rectifier circuit 3 through the main power transformer, and the first secondary side rectifier circuit 2 and the second secondary side rectifier circuit 3 are respectively connected with the switching The switch circuit 4 is connected to each other, and the switch switch circuit 4 adjusts the output terminal to be series or parallel by controlling the switch state.

[0025] like figure 1 As shown, the switch circuit 4 in this example includes a power...

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Abstract

The invention provides a wide-voltage-range output current feed converter, which comprises a primary side power circuit, a first secondary side rectification circuit, a second secondary side rectification circuit and a change-over switch circuit, wherein the primary side power circuit is connected to the first secondary side rectification circuit and the second secondary side rectification circuitthrough a main power transformer; the first secondary side rectification circuit and the second secondary side rectification circuit are respectively connected with the change-over switch circuit; and the change-over switch circuit adjusts the output ends to be connected in series or in parallel by controlling the on-off state. According to the change-over switch circuit, the output ends are adjusted to be connected in series or in parallel by controlling the on-off state, high-voltage small current is output during series connection, low-voltage large current is output during parallel connection, the wide-voltage-range output requirement of the converter is further met, voltage and current stress of components such as a main power switch tube, a transformer and an alternating-current inductor in the circuit design is small, and therefore the power density and the efficiency of the power source can be effectively improved.

Description

technical field [0001] The present invention relates to a converter, in particular to a wide voltage range output current feeding converter. Background technique [0002] Wide voltage range output power requires that the output voltage of the converter can be continuously adjusted in a very wide range. At present, according to the different modulation methods, it can be roughly divided into a pulse width modulation (PWM) type topology and a frequency modulation type (PFM) type topology. PWM-type topology can realize wide-range voltage adjustment through the adjustment of duty cycle, such as traditional buck, boost, buck-boost and its derived isolation topologies. This type of topology generally outputs maximum power when outputting maximum voltage. When the output power supply with a wide voltage range requires this type of topology to output the maximum power at a small voltage, due to the large current, the duty cycle is extremely small, the current RMS value is large, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335
CPCH02M3/33569H02M3/33576H02M1/0083
Inventor 施凯敏张迪刘贺付明朱洪雨
Owner SHENZHEN ACAD OF AEROSPACE TECH
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