LCC serial-parallel resonant power supply and method for increasing switching frequency by power supply

A parallel, power supply technology, applied in the output power conversion device, electrical components, regulating electrical variables and other directions, can solve the problems of increased output ripple, low switching frequency, increased damage energy of the launch tube, etc., to reduce switching loss, increased switching frequency, and improved power efficiency

Inactive Publication Date: 2015-02-04
BEIJING INST OF RADIO MEASUREMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Traditional high-voltage power supplies mostly use IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor) as switching devices, and the switching frequency is generally not high. Most work in the inductor current discontinuous mode (DCM), so that the IGBT is turned off under zero current conditions to reduce the turn-off loss, but the high-voltage power supply working in DCM mode adopts frequency conversion control, which is under no-load and light-load conditions The switching frequency drops to a few Hz to tens of Hz, resulting in larger output ripple. Although increasing the output filter capacitor can reduce the ripple, it also increases the destructive energy when the launch tube is ignited, which affects the reliability of the transmitter. At the same time, it will increase the volume of the power supply

Method used

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  • LCC serial-parallel resonant power supply and method for increasing switching frequency by power supply

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Embodiment 1

[0026] Embodiment 1. An LCC series-parallel resonant power supply. Combine below figure 1 The power supply provided by this embodiment will be described.

[0027] see figure 1 , is the electrical principle block diagram of the LCC series-parallel resonant power supply of this embodiment. The power supply consists of a full-bridge rectifier circuit 1, a filter capacitor component 3, a full-bridge inverter circuit 4, an LCC series-parallel resonant circuit 5, a main power transformer T1, a high-voltage rectifier component 6, a high-voltage energy storage filter capacitor C11 and a resistor component 7. Wherein, the full-bridge rectifier circuit 1, the filter capacitor component 3 and the full-bridge inverter circuit 4 are sequentially connected in parallel, the output terminal of the full-bridge inverter circuit 4 is connected to the input terminal of the resonant capacitor component 5, and the output terminal of the resonant capacitor component 5 is connected to the main The...

Embodiment 2

[0030] Embodiment 2, a method for increasing the switching frequency. Combine below figure 2 The method provided in this embodiment is described.

[0031] In this embodiment, an LCC series-parallel resonant power supply in Embodiment 1 is used to increase the switching power of the power switch tube in the full-bridge inverter circuit 4 . can refer to figure 2 And the first embodiment, firstly, the full-bridge rectifier circuit 1 rectifies the three-phase alternating current into a pulsating direct-current voltage and then filters it into a smooth direct-current voltage through the filter capacitor component 3; then the smooth direct-current voltage after filtering is converted into After the high-frequency AC square wave voltage, it is boosted by the LCC series-parallel resonant circuit 5 and the main power transformer T1 to obtain a high-voltage AC square wave; then the high-voltage rectification component 6 rectifies the high-voltage AC square wave into a high-voltage p...

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Abstract

The invention discloses an LCC serial-parallel resonant power supply and a method for increasing switching frequency by the power supply. The LCC serial-parallel resonant power supply comprises a full-bridge rectifier circuit, a filter capacitor assembly, a full-bridge inverter circuit, an LCC serial-parallel resonant circuit, a main power transformer T1, a high voltage rectifier assembly, a high voltage energy storage filter capacitor C11 and a resistor assembly. According to the power supply, by the aid of the soft-switching technology and the LCC serial-parallel resonant circuit, a power switching tube in the full-bridge inverter circuit is switched on and off under the condition of zero voltage, the switching frequency of the power switching tube is increased, switching loss is decreased, switching noise is reduced, and power efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of power supplies, in particular to an LCC series-parallel resonant power supply and a method for increasing switching frequency by using the same. Background technique [0002] The high-voltage power supply is an important part of the transmitter. It often determines the reliability, volume and weight of the transmitter. Its performance is directly related to the radio frequency quality and life of the transmitter, and affects the performance of the transmitter. [0003] Traditional high-voltage power supplies mostly use IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor) as switching devices, and the switching frequency is generally not high. Most work in the inductor current discontinuous mode (DCM), so that the IGBT is turned off under zero current conditions to reduce the turn-off loss, but the high-voltage power supply working in DCM mode adopts frequency conversion control, whi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/338
CPCH02M3/3381H02M3/3385Y02B70/10
Inventor 郑保磊黎明陈彦
Owner BEIJING INST OF RADIO MEASUREMENT
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