Flyback type multi-level output direct current power supply for quick tracking reference

A multi-channel output and group output technology, applied in the field of power electronics, can solve the problems of complex power supply and high cost, and achieve the effects of fast response, enhanced stability and anti-interference ability

Inactive Publication Date: 2013-03-27
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Because this solution requires multiple power supplies,

Method used

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  • Flyback type multi-level output direct current power supply for quick tracking reference
  • Flyback type multi-level output direct current power supply for quick tracking reference
  • Flyback type multi-level output direct current power supply for quick tracking reference

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Experimental program
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Embodiment Construction

[0018] The schematic diagram of the circuit is as figure 1 As shown, the circuit topology is divided into two parts, the positive group and the negative group. There are two flyback transformers, the upper one is the positive group flyback transformer, and the lower one is the negative group flyback transformer; the switch tube Q on the primary side of the two flyback transformers 1 and Q 2 Working in the high-frequency switching state, the number of turns of the primary side of the two flyback transformers is the same, and the number of turns of each winding on the secondary side of the two flyback transformers is the same. The multi-channel output of the secondary side is divided into positive group and negative group, positive group: P 1 ,P 2 ,...,P k-1 ,P k ;Negative group: N 1 , N 2 ,...,N k-1 , N k ; Each channel of the positive group outputs positive voltage +U, and each channel of the negative group outputs negative voltage -U; each output channel of the posit...

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Abstract

The invention provides a flyback type multi-level output direct current power supply for quick tracking reference. The power supply can be used for occasions where power supply voltage requires to be changed, for example, power supplies of a radio frequency power amplifier and a sound power amplifier can effectively improve power of the power amplifiers and reduce consumption. The direct current power supply increases auxiliary side winding number on the base of a flyback type switch power supply, connects outputs of each auxiliary side in series, and is matched with control of an auxiliary side output switch tube to achieve variation of output levels. Connection and disconnection of the auxiliary side output switch tube are controlled by input reference, so that the output levels can track input reference signals. Two-stage control strategy of the primary side switch tube control and the auxiliary side switch tube control are adopted in control, system response speed is increased, and anti-jamming capability is improved.

Description

technical field [0001] The invention is a flyback DC power supply whose output level can change with the input reference voltage, and belongs to the field of power electronics. Background technique [0002] In modern communication, the modulated signal needs to be amplified by a linear radio frequency power amplifier (RFPA) before being transmitted, as shown in Figure 2(a). Linear RFPA works in the linear amplification region, so it will generate a lot of loss, the loss is: [0003] P lose = 2 T ∫ 0 T / 2 [ Vcc - u o ( t ) ] u o ( t ) R...

Claims

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Application Information

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IPC IPC(8): H02M3/335H02M1/44H02M3/156
Inventor 邹爱龙王慧贞吴凯成陈晨陈颖玉
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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