Parallel Power Supply Devices with Inter-Device Communication
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Solution Overview
Problem
Existing power supply devices that output large currents face issues with heat resistance, safety, and stability, especially when multiple devices are parallel-connected to a common load, leading to unstable current supply due to independent operation and the need for costly external control devices.
Innovation Solution
A power supply system where two power supply devices communicate to stabilize current output, with one device calculating and transmitting control information to the other, allowing synchronized control and display of operating states, and switching communication modes based on operational conditions to ensure safety and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If multiple power supply devices are parallel-connected to a common load, then the current output capability is improved, but the current supply stability deteriorates due to independent operation of each device
Solution Approach 1:
The patent merges the control functions of multiple power supply devices by having them communicate with each other. The first power supply device calculates control information and transmits it to the second power supply device, which then controls its output based on this shared control information. This combining of control strategies ensures stable current supply while maintaining the enhanced current output capability of parallel-connected devices.
2Reliability
If external control devices are introduced to monitor and correct parallel-connected power supply devices, then the current supply stability is improved, but the equipment cost increases
Solution Approach 1:
The patent implements self-service control where the power supply devices themselves perform the monitoring and correction functions. The first power supply device monitors its own current output and calculates control information, then shares this with the second device. This eliminates the need for external control devices, maintaining current supply stability while avoiding additional equipment costs.
3Power
If a single power supply device outputs large current, then the current output capability is improved, but the heat resistance and safety deteriorate
Solution Approach 1:
The patent segments the current output function across multiple power supply devices connected in parallel. Each device handles a portion of the total current load, which reduces the thermal burden and safety risks on any single device while maintaining the overall high current output capability. The communication system ensures coordinated operation to optimize this load distribution.
Data Source
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AI summary
A power supply system includes multiple power supply devices (1) connected in common to a load (2). A first power supply device (1) calculates control information for controlling voltage or current to be output to the load (2) and controls the output to the load (2) based on the calculated control information while transmitting the control information to a second power supply device (1). The second power supply device (1) receives the control information transmitted from the first power supply device (1) and control the output to the load (2) based on the received control information while detecting current to be output from its own device to the load (2) and transmitting current information to the first power supply device (1). The first power supply device (1) receives the current information transmitted from the second power supply device (1) and calculate control information based on the received current information and the current and voltage detected by its own device.