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Parallel connection jitter frequency switch power supply and method

A technology of switching power supply and parallel connection, which is applied in the field of power supply and can solve problems such as difficulty in improving system performance and harmonic interference

Active Publication Date: 2012-02-08
VERTIV CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If the problem of harmonic interference between various power modules cannot be solved, it will be difficult to improve the performance of the entire system in all aspects, such as THD (Total Harmonic Distortion, total harmonic distortion), PF (Power Factor, power factor), efficiency, etc. aspect

Method used

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  • Parallel connection jitter frequency switch power supply and method
  • Parallel connection jitter frequency switch power supply and method
  • Parallel connection jitter frequency switch power supply and method

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Embodiment Construction

[0067] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0068] The parallel frequency shaking switching power supply provided by the present invention includes a switch driving module and at least two parallel power supply modules. The present invention adopts the frequency shaking technology between each power supply module, that is, at least two switch drive signals are sent by the switch drive module to drive the at least two power supply modules correspondingly, the switching frequency of the at least two switch drive signals is fixed, and the The switching frequencies of the at least two switch driving signals are not equal. The present invention can be implemented mainly in two ways, which are embodied by the first embodiment and the second embodiment respectively.

[0069] see figure 1 , is a s...

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Abstract

The invention relates to a parallel connection jitter frequency switch power supply, which comprises a switch driving module and at least two power supply modules in electric parallel connection, wherein the switch driving module sends out at least two switch driving signals for correspondingly driving at least two power supply modules, and the switch frequencies of at least two switch driving signals are fixed and are different. The invention also correspondingly provides a parallel connection jitter frequency method for the switch power supply. Through setting fixed and different switch frequencies for each power supply module or further setting fixed and different switch frequency for power supply sub modules in the power supply module, the harmonic interference is effectively scattered, the harmonic interference energy is reduced, and the electromagnetic interference (EMI) problem of the whole switch power supply system is solved.

Description

technical field [0001] The invention relates to power supply technology, more specifically, to a switching power supply and method using parallel frequency shaking technology. Background technique [0002] Due to the high dv / dt and di / dt of the switching power supply, the parasitic inductance and capacitance in the circuit make it difficult to eliminate the electromagnetic interference noise of the switching power supply. At present, in order to solve the EMI (Electromagnetic Interference, electromagnetic interference) problem of the power supply system, the existing switching power supply usually adopts a method of controlling the operating frequency of the switching power supply so that it changes periodically. Since the operating frequency of the switching power supply is not fixed, the harmonic frequency points are distributed in a band shape, and the spectral energy is also dispersed in the noise frequency band, while the total energy is the same, so that the amplitude ...

Claims

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Application Information

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IPC IPC(8): H02M1/088H02M1/44
Inventor 张强邹丽霞谢鸣静
Owner VERTIV CORP
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