Power Supply Device Adapting to Input Frequency Fluctuations
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Solution Overview
Problem
Conventional power supply devices fail to start or operate stably when the frequency of the primary power supply fluctuates, leading to instability and potential device failure.
Innovation Solution
A power supply device with a rectifier, frequency detector, current limiter, charge accumulation unit, current detector, and controller that adjusts the current output and capacitance in response to frequency fluctuations, ensuring the current output exceeds the load's current consumption, thereby maintaining stable operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional power supply device structure is used, then device complexity is reduced, but reliability deteriorates when frequency fluctuates
Solution Approach 1:
The patent applies dynamics by making the power supply device adaptable to frequency changes through dynamic control of the switching element. The controller adjusts the switching timing based on detected frequency variations, allowing the device to maintain stable operation across different frequency conditions without requiring multiple fixed-frequency circuits.
Solution Approach 2:
The patent changes the operating parameters of the power supply device in response to frequency fluctuations. Specifically, the controller modifies the switching duty cycle and timing of the switching element based on the detected input frequency, thereby adjusting the power conversion characteristics to maintain output stability despite input frequency variations.
2Adaptability or versatility
If fixed current and capacitance values are used, then device complexity is reduced, but adaptability deteriorates under frequency fluctuation
Solution Approach 1:
The patent implements feedback by using a frequency detection circuit to monitor the input power supply frequency and feeding this information back to the controller. The controller then adjusts the switching element's operation based on the detected frequency, creating a closed-loop system that automatically adapts to frequency changes without requiring manual intervention or complex pre-programming.
Solution Approach 2:
The patent achieves universality by designing a power supply device that can operate across a wide range of input frequencies using a single unified control strategy. The controller and switching element work together to handle both fixed and fluctuating frequency inputs through the same adaptive mechanism, eliminating the need for separate circuits designed for specific frequency ranges.
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
The device ensures stable operation of electronic devices by adapting to fluctuating power supply frequencies, preventing current shortages and enabling operation across various frequency inputs, including those not typically supported by commercial power supplies.
Implementation Method 1
a rectifier that rectifies an AC voltage applied to the power input terminal
Implementation Method 2
a charge accumulation unit that accumulates charge output from the current limiter
Data Source
AI summary
A power supply device is configured with input terminal (11) connectable to AC power supply (1) whose power supply frequency fluctuates, rectifier (12) that rectifies an AC voltage applied to power input terminal (11), frequency detector (13) that measures frequency of rectifier (12), current limiter (14) that regulates current output from rectifier (12), charge accumulation unit (15) that accumulates charge output from current limiter (14), current detector (16) that measures current output from charge accumulation unit (15), load connection terminal (17) connectable to load (20) that is operated by current output from current detector (16), and controller (18) that controls a regulated value of current limiter (14) and capacitance of charge accumulation unit (15) in accordance with fluctuation of the frequency measured by frequency detector (13) in such a manner that the current output from charge accumulation unit (15) becomes larger than current consumed by load (20) at a predetermined time.