Multiple Output Converter Time Division Control
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Solution Overview
Problem
Existing multiple output converters for electronic products face challenges in independently controlling multiple output terminals with varying voltage levels, as they require efficient power distribution and feedback control to maintain constant voltage despite load changes.
Innovation Solution
A multiple output converter employing a time division multiple control method, utilizing a power conversion circuit with a transformer unit and second switches in each output terminal, synchronized with a switching control unit that transmits pulse width modulation signals to control the first and second switches, allowing independent feedback control and power compensation across output terminals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple output terminals are controlled simultaneously using conventional PWM control, then power distribution is achieved, but independent control of each output terminal is lost and voltage levels cannot be maintained under varying loads
Solution Approach 1:
The patent segments the control of multiple output terminals by introducing separate second switches for each output terminal. Each second switch is independently controlled based on feedback from its respective output terminal, enabling independent voltage regulation while sharing a common transformer and control structure. This segmentation resolves the contradiction by providing both independent control capability and reliable constant voltage maintenance.
2Productivity
If switching frequency is increased to improve power distribution efficiency, then power conversion efficiency improves, but size of inductive or capacitive components must be reduced which increases complexity
Solution Approach 1:
The patent employs periodic switching action with optimized duty cycles for the first and second switches. By using pulse width modulation with appropriate duty cycle ranges (20%-80% for first switch, 10%-90% for second switches), the system achieves efficient power conversion while maintaining manageable component sizes. The periodic switching at optimized frequencies balances efficiency gains with component size constraints.
3Reliability
If feedback control is implemented for each output terminal, then voltage stability under load changes is improved, but control system complexity increases
Solution Approach 1:
The patent merges the feedback control structures by having the switching control unit centrally manage duty cycle adjustments for all second switches based on feedback from each output terminal. While individual feedback loops are maintained for voltage stability, the control logic is unified in a single control unit that coordinates all switches, reducing overall system complexity compared to completely independent control circuits for each terminal.
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
Enables precise, independent control of multiple output terminals, ensuring constant voltage levels across all outputs, reducing the size of inductive or capacitive components and enhancing the converter's adaptability to load changes.
Implementation Method 1
a transformer unit configured to convert a magnitude of input power applied through the input unit
Implementation Method 2
a switching control unit configured to transmit a pulse width modulation signal to the first switch and the second switch so as to control the first switch and the second switch by the time division multiple control method
Data Source
AI summary
A multiple output converter is provided. The multiple output converter includes a power conversion circuit and a switching control unit. The power conversion circuit includes an input unit having at least one first switch, a transformer unit configured to convert a magnitude of power from the input unit, an output unit having a plurality of output terminals, which are configured to receive the power from the transformer unit, and a second switch unit having a plurality of second switches, wherein each of the plurality of second switches is installed in each of the plurality of output terminals, respectively, and is controlled in a time division multiple control manner. The switching control is configured to transmit a pulse width modulation signal to the at least one first switch and the plurality of second switches for controlling the at least one first switch and the plurality of second switches in the time division multiple control manner.