Power Converter Clock Module Regulating Output Voltage

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Solution Overview

Problem

Switching power converters face challenges in rapidly regulating output voltage when the load changes, leading to significant voltage drops due to increased current demands, as existing systems struggle to respond quickly enough to maintain desired voltage levels.

Innovation Solution

A power converter system with a control module that monitors output voltage deviations and generates a clock control signal to adjust the pulse width modulated signal, allowing the main switch to switch on and off in response, thereby rapidly restoring the output voltage to its desired value by varying the clock signal frequency and duty cycle.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If the load increases rapidly, then the current demand increases, but the output voltage drops significantly

Engineering Contradiction:

Improvecurrent demandVSAvoidoutput voltage stability

Core Design Contradiction:

Quantity of substanceVSReliability

Solution Approach 1:

The control module receives feedback signals including output voltage feedback and switching current feedback, continuously monitoring the system state to detect load changes and adjust the pulse width modulated signal accordingly, ensuring output voltage remains stable despite rapid load variations

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The system dynamically adjusts the pulse width modulated signal in real-time based on detected load changes, varying the duty cycle and frequency of the control signal to the main switch to rapidly respond to current demand changes and maintain voltage stability

Inventive Principle:

Principle #15Dynamics

2Ease of operation

If conventional control methods are used, then the system is simple to implement, but the response speed to load changes is slow

Engineering Contradiction:

Improvecontrol simplicityVSAvoidresponse speed to load changes

Core Design Contradiction:

Ease of operationVSSpeed

Solution Approach 1:

The control module is pre-configured with multiple feedback signal inputs and processing circuits that are ready to immediately detect and respond to load changes, eliminating detection delays and enabling rapid response while maintaining a straightforward control architecture

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system replaces conventional slower control mechanisms with an electronic control module that processes feedback signals and generates pulse width modulated signals electronically, achieving much faster response speeds while keeping the control logic relatively simple

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentUS9231574B2Power converter, clock module and associated control method

Publication Date: 2016.01.05 CHENGDU MONOLITHIC POWER SYST

AI summary

A power converter and a clock module employed for providing a clock signal to the power converter. The power converter converts an input voltage to an output voltage based on at least the switching on and off of a main switch. The clock module monitors a deviation of the output voltage from its desired value and compares the deviation with a predetermined threshold window to provide a clock control signal. The clock module further regulates the clock signal in response to the clock control signal.