Power Supply Apparatus Zero-Current Switching Arc Prevention
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Solution Overview
Problem
The existing power supply apparatuses in uninterruptible power systems face issues with electric arcs and high-frequency noise during switching operations, which affect the efficiency and reliability of power transfer.
Innovation Solution
A power supply apparatus and method that involves a power switch with switches that stop voltage converting operations during a first time period when the primary power is cut off and restart them during a second time period after the switch is turned on, ensuring zero-current switching and preventing electric arcs and bouncing noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If switching operation is performed between main power and auxiliary power through ATS, then power supply continuity is maintained, but electric arc phenomenon occurs and high frequency noise is generated
Solution Approach 1:
The controller stops the voltage converting operation before the switching operation is performed. By preemptively halting the voltage conversion process, the current flowing through the power switch is reduced to zero or near-zero levels, thereby preventing electric arc generation and high frequency noise during the transition between power sources while maintaining continuous power supply
2Adaptability or versatility
If switches SWA1-SWA4 perform switching operation, then power transfer between VP1 and VP2 is achieved, but current in circuit causes electric arc situation
Solution Approach 1:
The controller stops the voltage converting operation in advance before the power switching occurs. This preliminary action ensures that when the power switches transition between VP1 and VP2, the current is already reduced to minimal levels, preventing electric arc formation while preserving the adaptability of power transfer between different power sources
Solution Approach 2:
The controller changes the operational state of the voltage converting operation from active to stopped state before switching occurs. By changing this parameter (operation status), the current level is fundamentally altered, which prevents electric arc during the power transfer process while maintaining the system's ability to transfer power between different sources
3Adaptability or versatility
If switches SWA1-SWA4 switch during power conversion, then power source selection is achieved, but bouncing phenomenon generates high frequency noise
Solution Approach 1:
The controller stops the voltage converting operation before the switching operation. This preliminary cessation of voltage conversion ensures that when power source selection switching occurs, there is minimal current flow, thereby preventing the bouncing phenomenon that would otherwise generate high frequency noise while preserving the power source selection capability
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 approach effectively prevents electric arcs and high-frequency noise, maintaining the efficiency and reliability of power supply operations by ensuring zero-current switching during power transitions.
Implementation Method 1
The supplied power generator is coupled to the power switch, receiving and performing a voltage converting operation to a first power or a second power to generate supplied power
Data Source
AI summary
A power supply apparatus and a power supplying method thereof are provided. The power supply apparatus includes a power switch and a supplied power generator. The power switch respectively receives a first power and a second power through a first switch and a second switch. The supplied power generator converts the first power or the second power to generate a supplied power. When the supplied power generator judges the first power being cut off, during a first time period, the first switch is cut off and a voltage converting operation of the supplied power generator is stopped. During a second time period, the second switch is turned on, and the voltage converting operation of the supplied power generator is restarted after the second switch being turned on.