UPS Voltage Regulating Circuit Bypasses Transformer
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Solution Overview
Problem
Conventional voltage regulating circuits for UPSs cause transformer damage due to continuous heating when input voltage is at a normal level, as the input voltage still passes through the transformer.
Innovation Solution
A voltage regulating circuit comprising a first switch, a transformer, and a second switch, where the input voltage bypasses the transformer at normal levels, using normal close and normal open nodes to direct the voltage through switches only, preventing unnecessary transformer usage and heating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the input voltage passes through the transformer at normal voltage levels, then voltage regulation is maintained, but the transformer heats up and may be damaged by constant heating
Solution Approach 1:
The circuit dynamically switches between two configurations: at normal voltage levels, the first switch connects the output directly to the input (bypassing the transformer); at low voltage levels, the second switch connects the output through the transformer. This dynamic switching resolves the contradiction by eliminating transformer heating during normal operation while preserving voltage regulation capability when needed.
Solution Approach 2:
The harmful function of the transformer (heating during normal operation) is extracted and eliminated by providing an alternative current path through the first switch that bypasses the transformer entirely during normal voltage conditions, while retaining the transformer for voltage boosting when required.
2Productivity
If the transformer is used continuously for voltage regulation, then voltage output is maintained, but energy loss increases due to constant transformer operation
Solution Approach 1:
The circuit dynamically adapts its configuration based on input voltage conditions. During normal operation, the direct connection through the first switch eliminates transformer-related energy losses. During low voltage conditions, the transformer is engaged only when necessary for voltage boosting, minimizing energy loss while maintaining productivity.
Solution Approach 2:
Instead of continuous transformer operation, the circuit applies partial action by using the transformer only during low voltage periods when voltage regulation is needed, rather than operating it excessively during normal voltage conditions where it causes energy loss.
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 design prevents transformer damage by avoiding unnecessary heating, thereby extending its lifespan and ensuring reliable operation.
Implementation Method 1
The transformer (10) is connected to AC power inputs L and N and comprises a first coil (11) and a second coil (12) connected in series... The input voltage passes through the second coil (12) of the transformer (10) and the switch (23) to be transformed into an output voltage.
Data Source
AI summary
A voltage regulating circuit has a first switch, a transformer and a second switch. The first switch has an input node, a first node and a second node. The transformer is connected to the switches has a first coil and a second coil. The first coil and the second coil respectively have an end, and the second coil is connected to the first coil in series at a node. The node between the first and second coils is connected to the second node of the first switch. The second switch is connected to the transformer and has a first node, a second node and an output node. The first node is connected to the end of the first coil. The second node is connected to the first node of the first switch. The transformer will not heat up when the transformer needs not to be used.