Voltage Conversion Device Smooth Mode Switching
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Solution Overview
Problem
Existing voltage conversion devices experience instability when switching between voltage control and current control modes, leading to temporary reductions in stability and output power stability.
Innovation Solution
A voltage conversion device with a control unit that performs feedback control processes for both current and voltage control modes, using target currents and voltages to smoothly switch between modes by calculating operational amounts to minimize abrupt changes and maintain stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate control signals are used for voltage control and current control modes, then both control modes can be implemented, but the control signal may abruptly change when switching between modes, causing instability
Solution Approach 1:
The patent merges the voltage control signal and current control signal into a single unified control signal. The control signal is generated by adding a voltage control signal (derived from voltage deviation) and a current control signal (derived from current deviation). This unified control signal is then used for switching control of the voltage conversion unit, eliminating the need to switch between separate control signals and preventing abrupt changes during mode transitions.
Solution Approach 2:
The control unit is designed to perform multiple functions using a single control signal. The same control signal serves both voltage control and current control purposes by incorporating both voltage deviation and current deviation components. This multi-functional approach allows the system to operate in different modes (voltage control mode, current control mode, or both simultaneously) without requiring separate control signal paths, thereby ensuring smooth transitions and stable operation.
2Reliability
If a unified control signal combining voltage and current control is used, then stability during mode switching is improved, but the control system complexity increases
Solution Approach 1:
The control unit combines voltage control and current control into a single unified control signal generation process. Instead of maintaining separate control circuits for voltage and current modes, the patent merges both control functions into one control unit that generates a single control signal by adding the voltage control component and current control component. This reduces the number of separate control paths and simplifies the overall control system architecture.
Solution Approach 2:
The control unit is designed as a multi-functional component that handles both voltage control and current control operations. By making the control unit universal and capable of performing both functions, the patent eliminates the need for separate dedicated control circuits for each mode, thereby reducing system complexity while maintaining the ability to operate in different control modes as needed.
Data Source
AI summary
A voltage conversion device can smoothly switch between a state of performing voltage control and a state of performing current control while maintaining the stability of operation of a voltage conversion unit. A control unit (10) of the voltage conversion device (1) selectively switches the control mode of the voltage conversion unit (3) to a current control mode or a voltage control mode and performs a control process of each control mode. In the voltage control mode, the control unit (10) determines a target current for voltage control according to a voltage deviation and performs the same feedback control process as the current control mode by using the target current to control the voltage conversion unit.