Composite Modulation Data Transmission in Power Electronic Devices
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional power line communication techniques require special devices for data signal manipulation, leading to increased costs and failure risks, while existing methods for data transmission through power electronic devices are inefficient and costly.
Innovation Solution
A method utilizing composite modulation to embed data information within a PWM modulation process, using power electronic devices to transmit data through power lines via driving pulse signals, and extracting signals for demodulation, eliminating the need for special communication devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional power line communication techniques are used, then data transmission through power lines is achieved, but special devices are required which increase cost and bring failure risks
Solution Approach 1:
The patent applies multi-functionality by enabling power electronic devices to perform both power transmission and data transmission functions. The existing power electronic devices are made to carry communication data through composite modulation of PWM signals, eliminating the need for separate special communication devices and thereby reducing cost and failure risks while maintaining reliability
Solution Approach 2:
The patent merges the power transmission and data transmission functions into a single system. By combining the data signal with the PWM modulation signal through composite modulation, the system transmits both power and data through the same power line using the same power electronic devices, thus eliminating the need for separate special communication devices
2Ease of manufacture
If conventional power line communication techniques are used, then data transmission is achieved, but construction and maintenance costs increase
Solution Approach 1:
The patent makes power electronic devices universal by enabling them to perform both power transmission and data transmission. This eliminates the need for separate special communication devices, thereby reducing construction and maintenance costs while simplifying the overall system
Solution Approach 2:
The power electronic devices serve themselves by performing both power transmission and data transmission functions. The system uses the existing power electronic devices to carry communication data through composite modulation, eliminating the need for external special communication devices and thereby reducing construction and maintenance costs
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables simultaneous power and data transmission through power lines using existing power electronic devices, reducing construction and maintenance costs, and leveraging core hardware and software resources, thus aligning with the trend of advanced power control techniques.
Implementation Method 1
utilizing a composite modulation method to include specific data information in a PWM modulation process
Implementation Method 2
extract signals of the voltage and current in the power line
Data Source
AI summary
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.