Voltage Compensation Circuit With Temperature-Adaptive RC Tuning
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Solution Overview
Problem
Existing voltage reducing circuits face challenges with high cost, poor temperature adaptation, low compensation accuracy, and stability due to the fixed resistance and capacitance values, which are not effectively adjusted for varying temperatures, leading to increased design costs and suboptimal performance.
Innovation Solution
A voltage compensation method and device that dynamically adjusts the capacitance and resistance values of the compensation circuit by using capacitors with positive temperature coefficients and resistors with negative temperature coefficients, ensuring that the zeros and poles of the transfer function remain within a predetermined range, thereby maintaining stability and accuracy across different temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If fixed resistance and capacitance values are used in the compensation circuit, then the circuit design is simple, but the temperature adaptability is poor and compensation accuracy is low
Solution Approach 1:
The patent changes the parameter characteristics of resistors and capacitors by selecting components with specific temperature coefficients. Resistors with positive temperature coefficients and capacitors with negative temperature coefficients are used to create compensation effects that adapt to temperature variations, transforming fixed parameter designs into temperature-adaptive parameter designs.
Solution Approach 2:
The patent combines resistors and capacitors with opposite temperature coefficients to form a composite compensation circuit. This composite structure leverages the opposing temperature characteristics of different components to achieve temperature compensation, where the positive temperature coefficient of resistors compensates for the negative temperature coefficient of capacitors.
2Adaptability or versatility
If capacitance value is over designed to adapt to all working environments, then temperature adaptability improves, but hardware cost increases
Solution Approach 1:
Instead of increasing capacitance value empirically, the patent changes the temperature coefficient parameter of the capacitor to negative, enabling automatic temperature compensation. This allows the circuit to adapt to working environments through parameter characteristics rather than through increased component quantity or over-design.
Solution Approach 2:
The compensation circuit uses the inherent temperature coefficients of its components to automatically compensate for temperature effects. The circuit self-regulates its compensation effect based on temperature changes without requiring external adjustment or over-design, eliminating the need for excessive capacitance values.
3Reliability
If compensation circuit parameters are not adjusted for temperature, then circuit design is simple, but stability of output voltage deteriorates
Solution Approach 1:
The patent achieves temperature compensation by selecting components with specific temperature coefficient parameters. The positive temperature coefficient of resistors and negative temperature coefficient of capacitors automatically adjust the compensation effect with temperature, maintaining output voltage stability without requiring active parameter adjustment mechanisms.
Solution Approach 2:
The compensation circuit provides automatic feedback compensation through the temperature-dependent characteristics of its components. As temperature changes affect the capacitor's impedance, the resistor's temperature coefficient compensates for this change, creating a self-regulating feedback mechanism that maintains stability.
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 solution provides stable voltage compensation, reduces hardware costs, and enhances temperature adaptability and compensation accuracy, ensuring the output voltage stability across varying temperatures by adjusting the circuit parameters accordingly.
Implementation Method 1
setting each capacitor and the resistor not in direct connection with the capacitor in series to have a positive temperature coefficient, and setting the resistor in direct connection with the capacitor in series to have a negative temperature coefficient
Data Source
AI summary
Disclosed are a voltage compensation method and device of a voltage reducing circuit. The voltage compensation method includes: determining a capacitance value of each capacitor and a resistance value of each resistor in a voltage compensation circuit according to a voltage compensation expectation of the voltage reducing circuit; determining each zero and each pole of a transfer function of the voltage compensation circuit according to the capacitance value of each capacitor and the resistance value of each resistor; setting each capacitor and the resistor not in direct connection with the capacitor in series to have a positive temperature coefficient, and setting the resistor in direct connection with the capacitor in series to have a negative temperature coefficient; and compensating voltage for the voltage reducing circuit by using the voltage compensation circuit to output a rated voltage.