Master Device Power Control for Standby Consumption
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Solution Overview
Problem
In electric power supply systems for electrical components, such as those in electrically assisted pedal cycles, the increased number of components leads to rapid battery consumption, and components often remain in a standby state for extended periods, resulting in ineffective power consumption.
Innovation Solution
An electric power supply system that includes a battery, an operation unit, a slave device with an operation execution switch, and a master device connected to the battery. The master device controls power supply through a power transmission line by determining if current is flowing, and only supplies power when the operation unit is activated, thereby reducing power consumption during standby states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If power supply voltage is continuously supplied to slave devices, then the electrical components can operate reliably, but power consumption increases and battery life decreases
Solution Approach 1:
The master device performs periodic detection of current flow status through the power transmission line and intermittently supplies power supply voltage to slave devices based on detected operation status, replacing continuous power supply with periodic assessment and conditional power delivery to reduce unnecessary power consumption
Solution Approach 2:
The master device detects current flow status through the power transmission line to determine whether slave devices are in operation, using this feedback information to control power supply voltage output, ensuring power is supplied only when actually needed rather than continuously
2Adaptability or versatility
If the number of electrical components is increased, then system functionality is improved, but battery consumption accelerates
Solution Approach 1:
The master device periodically detects current flow status through the power transmission line and intermittently supplies power to multiple slave devices based on their actual operation status, enabling the system to support multiple components while consuming power only when needed, thus reducing overall battery consumption
Solution Approach 2:
The master device serves multiple slave devices through a common power transmission line, using a single detection and control mechanism to manage power distribution to multiple components, achieving multi-functionality while maintaining efficient power management
Data Source
AI summary
A master device supplies a power supply voltage through a power transmission line to a slave device that generates an operation signal indicating the contents of an operation received by an operation unit. The slave device includes an operation execution switch that is turned on to apply a reference voltage to the power transmission line, upon reception of the operation by the operation unit. The master device determines whether or not a current accompanying a pilot signal is flowing through the power transmission line, while intermittently sending the pilot signal to the power transmission line in the state of stopping the supplying of the power supply voltage to the slave device. If it is determined that the current is flowing, the master device supplies the power supply voltage to the slave device.