Invention Grant
- Patent Title: Method, based on composite modulation, of data transmission between power electronic devices without communication line
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Application No.: US15310389Application Date: 2014-07-15
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Publication No.: US09755696B2Publication Date: 2017-09-05
- Inventor: Jianfeng Zhao , Zhendong Ji , Wei Liu , Yichao Sun
- Applicant: SOUTHEAST UNIVERSITY
- Applicant Address: CN
- Assignee: SOUTHEAST UNIVERSITY
- Current Assignee: SOUTHEAST UNIVERSITY
- Current Assignee Address: CN
- Agency: Hayes Soloway P.C.
- Priority: CN201410195483 20140512
- International Application: PCT/CN2014/082184 WO 20140715
- International Announcement: WO2015/172430 WO 20151119
- Main IPC: H04B3/54
- IPC: H04B3/54 ; H04L27/12 ; H04L25/49

Abstract:
A method of data transmission between power electronic devices without a communication line involves generation of a digital signal in a data transmission process. The digital signal enables PWM modulation of specific data information via a composite modulation method. The composite modulation superimposes PWM modulation waves after modulating the PWM carrier frequency or conducting high-frequency modulation on the data. The composite modulation generates a PWM drive pulse signal which is transmitted to a power circuit via a main power electronic circuit to complete the data transmission process. In the data receiving process, signals are extracted on the voltage and current of a power line via software or hardware, and data demodulated to obtain the data information to complete the data receiving process.
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