UPS AVR Switch Timing for Voltage Spike Suppression
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Solution Overview
Problem
Uninterruptible power sources (UPS) face damage from excessive mains power voltage fluctuations due to the lack of regulation capability, leading to interference and potential harm to sensitive loads.
Innovation Solution
An uninterruptible power source with an automatic voltage regulator (AVR) and controlled switch logic that includes a second battery mode and delayed switch operations to manage voltage abnormalities, ensuring excitation energy is dissipated safely without additional hardware.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the automatic voltage regulator is added to regulate output voltage, then the protection capability against voltage fluctuations is improved, but the device complexity increases
Solution Approach 1:
The automatic voltage regulator is segmented into multiple independent switches (step-up switch, step-down switch, transformer switch) that can be controlled independently based on voltage conditions. This allows the system to provide comprehensive voltage regulation while maintaining modular complexity management.
Solution Approach 2:
The system performs preliminary detection of input voltage abnormalities and activates the automatic voltage regulator in advance before damage occurs to the load. The controlled switch operations prepare the circuit configuration proactively to prevent voltage spikes from reaching the load.
2Speed
If the switch operations are performed immediately upon detecting voltage abnormality, then the response speed is improved, but interference and voltage spikes are generated
Solution Approach 1:
The system applies preliminary anti-action by introducing controlled waiting periods before executing switch operations. This prevents immediate switch actions that would generate harmful voltage spikes and interference, while still responding to voltage abnormalities in a timely manner.
Solution Approach 2:
The waiting period acts as a cushioning mechanism that absorbs the harmful effects of immediate switch operations. By delaying the switch actions, the system prevents the generation of interference and voltage spikes that would otherwise occur with immediate response.
3Object-affected harmful factors
If the waiting time is extended to suppress interference, then the interference suppression is improved, but the response time increases
Solution Approach 1:
The system applies partial waiting action by introducing minimal but sufficient delays (first waiting time and second waiting time) rather than excessive delays. This provides just enough cushioning to suppress interference while maintaining acceptable response speed for voltage regulation.
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
Effectively suppresses interference by managing excitation energy dissipation, protecting sensitive devices from voltage spikes and maintaining stable power delivery.
Implementation Method 1
the automatic voltage regulator including a step-up switch, a step-down switch, and a transformer switch
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
An uninterruptible power source (100) and a method for suppressing interference in an uninterruptible power source (100) are provided, the uninterruptible power source (100) including an input switch (103), an output switch (105), and an automatic voltage regulator (104) connected between the input switch (103) and the output switch (105), and the uninterruptible power source (100) being configured such that: in the case of the automatic voltage regulator (104) working, when an abnormality of an input voltage is detected, the output switch (105) is connected to a side of the battery (108) to enter a second battery mode, waiting is performed for a first time, and then states of the step-up switch (104a), the step-down switch (104b), and the transformer (Tr) switch of the automatic voltage regulator (104) are controlled according to the input voltage; and waiting is performed for a second time greater than the first time, and then a state of the input switch (103) is controlled according to the input voltage.