Title:
SMART SINE WAVE BUCK CONVERSION APPARATUS
Document Type and Number:
WIPO Patent Application WO/2018/094897
Kind Code:
A1
Abstract:
A smart sine wave buck conversion apparatus, comprising: an input rectifier unit (10); a high frequency modulation unit (30), comprising a first switch transistor (Q7) and a second switch transistor (Q10), a drain electrode of the first switch transistor being connected to an output end of the input rectifier unit, a source electrode of the first switch transistor being connected to a drain electrode of the second switch transistor, a source electrode of the second switch transistor being grounded (HGND1), a gate electrode of the first switch transistor and a gate electrode of the second switch transistor respectively being used for accessing two PWM pulse signals (PWM1, PWM2) having opposite phases; an inductance filter unit (50), comprising an inductor (L3) and a capacitor (C6), the front end of the inductor being connected to the source electrode of the first switch transistor; a phase inversion unit (60); and a filter control unit (20), comprising an electrolytic capacitor (C1) and a third switch transistor (Q12), a positive electrode of the electrolytic capacitor being connected to an output end of the input rectifier unit, the negative electrode of the electrolytic capacitor being connected to a drain electrode of the third switch transistor, and a source electrode of the third switch transistor being grounded. The present apparatus has good buck conversion effects, is portable, can prevent damage to the load, and can prevent interference with a power grid.
Inventors:
HOU TAO (CN)
Application Number:
PCT/CN2017/075078
Publication Date:
May 31, 2018
Filing Date:
February 28, 2017
Export Citation:
Assignee:
GUANGDONG BESTEK E COMMERCE CO LTD (CN)
International Classes:
H02M5/458; H02M1/12; H02M3/335; H02M7/5395
Foreign References:
| CN102005954A | 2011-04-06 | |||
| CN101674004A | 2010-03-17 | |||
| CN102969905A | 2013-03-13 | |||
| US6728118B1 | 2004-04-27 |
Attorney, Agent or Firm:
GUANGZHOU NANFENG PATENT AGENCY CO., LTD. (CN)
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