Power Supplier Voltage Drop Compensation via Dual Error Amplifiers
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Solution Overview
Problem
Voltage drops occur in power lines due to equivalent RLC circuits, leading to errors in input voltage received by loads, especially when current is higher, and existing solutions do not effectively compensate for these drops.
Innovation Solution
A power supplier system with a PWM signal generator, power conversion circuit, first and second error amplifiers, and a power conversion circuit with an inductor, which generates switching signals to adjust the supply voltage and compensate for voltage drops by modulating the duty cycle based on detected voltage errors between the load's input terminals and ground.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If power is supplied through power lines with equivalent RLC circuits, then power delivery is achieved, but voltage drop occurs causing error in input voltage at the load
Solution Approach 1:
The patent implements a feedback mechanism by detecting the actual input voltage at the load through sampling circuits and comparing it with the expected voltage. The detected voltage error is then fed back to the power supplier, which adjusts its output accordingly to compensate for the voltage drop in the power lines, thereby maintaining accurate input voltage at the load.
Solution Approach 2:
The patent introduces an intermediary voltage detection and error calculation system between the power supplier and the load. This intermediary system samples the actual input voltage, calculates the voltage error relative to expected values, and transmits this error information back to the power supplier, enabling indirect voltage control and compensation.
2Power
If current flowing through the equivalent RLC circuit is increased, then power delivery capability is improved, but voltage drop error becomes greater
Solution Approach 1:
The patent employs dynamic voltage compensation by continuously monitoring the actual input voltage and adjusting the power supplier's output in real-time based on the detected voltage error. This dynamic adjustment allows the system to maintain accurate input voltage even when current varies, preventing the static voltage drop problem from worsening under different load conditions.
Solution Approach 2:
The patent changes the operating parameters of the power supplier based on detected voltage errors. By adjusting the output voltage parameter dynamically according to the measured voltage drop, the system compensates for the increased voltage error that occurs at higher currents, maintaining consistent input voltage accuracy across different power delivery levels.
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 system effectively maintains the desired voltage level across the load's input terminals by compensating for voltage drops, ensuring accurate power delivery even under varying load conditions.
Implementation Method 1
a power conversion circuit, a pulse width modulation (PWM) signal generator... The power conversion circuit generates a switching voltage to the inductor according to the at least one switching signal
Data Source
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Figure 3A~3B
AI summary
A power supplier for generating a supply voltage is provided. The power supplier includes a PWM signal generator, a power conversion circuit, and first and second error amplifiers. The PWM signal generator generates at least one switching signal according to a voltage error signal. The power conversion circuit generates a switching voltage to an inductor according to the at least one switching signal so as to generate the supply voltage. The first error amplifier detects the difference between a positive voltage signal and a reference voltage. The second error amplifier detects the difference between a negative voltage signal and a ground voltage. Output terminals of the first and second error amplifiers are coupled to a first node. The voltage error signal is generated at the first node. The PWM signal generator modulates a duty cycle of the switching signal according to the variation of the voltage error signal.