Capacitor Maximum Output Setting Device for Power Management
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Solution Overview
Problem
Existing maximum output setting devices for capacitors primarily rely on open-circuit voltage, lower limit voltage, and internal resistance, but fail to accurately calculate and set the maximum output, leading to potential excessive electric power output.
Innovation Solution
A maximum output setting device that includes a state detecting unit, a voltage-resistance calculating unit, and a maximum-output calculating unit to determine multiple maximum outputs based on allowable current, open-circuit voltage, and capacitor voltage, setting the smallest output as the execution maximum output to prevent excessive power delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If maximum output is set based on open-circuit voltage, lower limit voltage, and internal resistance only, then the setting process is simple, but the accuracy of maximum output calculation is insufficient leading to potential excessive power output
Solution Approach 1:
The maximum output calculation is segmented into three distinct calculation paths: maximum current-based output calculation, open-circuit voltage-based output calculation, and capacitor voltage-based output calculation. Each path uses different parameters and formulas to calculate maximum output, ensuring comprehensive coverage of various operating conditions. The control unit then selects the smallest value among these calculations to set the execution maximum output, preventing excessive power output while maintaining calculation accuracy.
2Measurement precision
If multiple maximum outputs are calculated using different methods, then the execution maximum output setting accuracy is improved, but the calculation complexity increases
Solution Approach 1:
The control unit continuously monitors capacitor state (voltage, current, temperature) and dynamically adjusts the execution maximum output based on real-time conditions. The system calculates multiple maximum output values and selects the smallest one as the execution maximum output, creating a feedback mechanism that ensures accurate power limitation under varying operating conditions without requiring complex external control systems.
Data Source
AI summary
A maximum current Imax is calculated on the basis of an open-circuit voltage Voc, a lower limit voltage Vcapmin, and an internal resistance Rcap of a capacitor and a first maximum output Wcouttmp1 is calculated on the basis of the maximum current Imax and the lower limit voltage Vcapmin. A second maximum output Wcouttmp2 is calculated on the basis of the open-circuit voltage Voc and an open-circuit lower limit voltage Vocmin. A third maximum output Wcouttmp3 is calculated on the basis of a capacitor voltage Vcap and the lower limit voltage Vcapmin. A smallest value among the calculated three maximum outputs is set as an execution maximum output Wcout of the capacitor. A motor is controlled to be driven in a range of this execution maximum output Wcout.