Title:
SYSTEM AND METHOD FOR CONTROLLING OUTPUT VOLTAGE OF MODIFIED WAVE INVERTER
Document Type and Number:
WIPO Patent Application WO/2018/094917
Kind Code:
A1
Abstract:
A system and a method for controlling an output voltage of a modified wave inverter are provided. The system comprises an inverter unit (1), a sampling unit (2), and a main control unit (3). The main control unit is configured to: sample a bus voltage via the sampling unit; output a multi-channel PWM drive signal to the inverter unit so as to cause the inverter unit to output an AC voltage; calculate an accumulative sum of AD values of sampling points of the bus voltage of the AC voltage within a single cycle (S2); calculate, according to the number of the sampling points, an average value of the accumulative sum of the AD values (S3); calculate, according to the average value, a value of the bus voltage (S4); calculate, according to the time of a single cycle of the AC voltage and the time over which a bridge arm of the inverter unit is in a conductive state within the cycle, a duty cycle of an output voltage of the inverter unit (S5); calculate, according to the value of the bus voltage and the duty cycle, a value of the output voltage of the inverter unit (S6); and control, according to the value of the output voltage, an operating state of the inverter unit (S7). The system and the method are able to reduce errors, enhance control accuracy, and reduce calculation loads.
Inventors:
XU XINHUA (CN)
Application Number:
PCT/CN2017/076865
Publication Date:
May 31, 2018
Filing Date:
March 16, 2017
Export Citation:
Assignee:
GUANGDONG BESTEK E COMMERCE CO LTD (CN)
International Classes:
H02M7/5387
Foreign References:
| CN104702136A | 2015-06-10 | |||
| CN103546024A | 2014-01-29 | |||
| US6570779B2 | 2003-05-27 |
Attorney, Agent or Firm:
GUANGZHOU NANFENG PATENT AGENCY CO., LTD. et al. (CN)
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