Electronic device for performing bottom-up power line communication and method for operating same
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Solution Overview
Problem
Existing electronic devices, such as cleaners, face challenges in maintaining constant communication performance across varying use environments due to changes in motor operation and foreign substance adherence, which affects suction efficiency and communication reliability.
Innovation Solution
An electronic device with a main body and kit connected via an electric wire, where the kit includes a second motor, inverter, and controller that controls the inverter's switching frequency to maintain a current greater than zero during information transmission, ensuring stable communication performance and adapting power usage based on communication needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If power line communication is used to transmit information between main body and kit, then communication function is enabled, but communication performance becomes unstable in varying use environments
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the switching frequency of the inverter based on communication requirements. When communication is needed, the switching frequency is set to a first value that ensures stable signal transmission, and when communication is not needed, it is set to a second value for normal motor operation. This dynamic parameter adjustment resolves the contradiction by adapting the system's electrical characteristics to maintain reliable communication across varying use environments.
Solution Approach 2:
The patent implements dynamics by making the inverter's switching frequency可调 (adjustable) rather than fixed. The controller dynamically changes the switching frequency between a first frequency (for communication mode) and a second frequency (for motor operation mode) based on whether communication is required. This dynamic adaptation enables the system to maintain stable communication performance while accommodating different operational conditions.
2Productivity
If motor operation is changed to adapt to foreign substance adherence, then cleaning effectiveness is improved, but communication reliability deteriorates
Solution Approach 1:
The patent applies periodic action by implementing distinct operational modes that alternate based on communication needs. The system periodically switches between a first operational state (optimized for communication with stable switching frequency) and a second operational state (optimized for cleaning with adjusted motor performance). This periodic alternation allows the system to achieve both effective cleaning and reliable communication by dedicating specific time periods to each function.
3Reliability
If inverter switching frequency is controlled for communication, then communication performance is stabilized, but power consumption increases
Solution Approach 1:
The patent applies dynamics by making the switching frequency adjustable based on operational mode. The controller dynamically sets the switching frequency to a first value during communication operations to ensure stable performance, and switches to a second value during normal motor operation to reduce power consumption. This dynamic adaptation resolves the contradiction by optimizing the frequency parameter for the current operational requirement rather than maintaining a constantly high frequency.
Solution Approach 2:
The patent implements periodic action by alternating between communication-optimized mode and power-saving mode. During communication periods, the system uses a switching frequency that ensures reliable data transmission. During non-communication periods, it switches to a different frequency that reduces power consumption while maintaining motor functionality. This periodic alternation allows the system to achieve both communication reliability and energy efficiency.
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
This solution guarantees constant communication performance and reduced power consumption by maintaining motor voltage and current intensity, even in changing environments, and allows for adaptive operation of the kit depending on communication requirements.
Implementation Method 1
transmit information to the main body from a kit connected to the main body based on communication using an electric wire
Implementation Method 2
the second controller is configured to transmit information to the first controller through switching frequency control of the inverter
Data Source
AI summary
Provided an electronic device including a main body and a kit connected to the main body, and the main body includes a battery, a first motor, an electric wire connected to the battery, and a first controller connected to the electric wire, the kit includes a second motor supplied with power through the electric wire, an inverter connected to the second motor, and a second controller connected to the electric wire and configured to control driving of the inverter, and the second controller is configured to transmit information to the first controller through switching frequency control of the inverter and control a switching frequency of the inverter so that a current associated with the second motor is greater than zero in a section in which transmission of the information is performed.