Class-E Power Conversion Control Without Added Voltage Adjustment
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Solution Overview
Problem
Existing power conversion devices with class-E power conversion circuits require additional voltage adjusting means, leading to increased device size, even when operating at high efficiency over a wide input range.
Innovation Solution
The power conversion method sets the On-Duty of the switch based on the output current or output power from the class-E power conversion circuit, allowing for efficient operation without the need for additional voltage adjusting components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If voltage adjusting means is added to stabilize input voltage, then high efficiency operation over wide input range is achieved, but device size increases
Solution Approach 1:
The class-E power conversion circuit automatically adjusts its operating parameters (switching frequency, On-Duty ratio) based on input voltage conditions to maintain high efficiency without external voltage adjusting means. The circuit serves itself by utilizing its inherent characteristics to adapt to varying input conditions.
Solution Approach 2:
The invention changes operating parameters (switching frequency, On-Duty ratio) dynamically based on input voltage levels. By adjusting these parameters, the circuit maintains optimal efficiency across a wide input voltage range without requiring additional voltage adjusting components.
2Stability of the object's composition
If additional voltage adjusting means is provided, then input voltage stabilization is achieved, but device complexity increases
Solution Approach 1:
The control unit within the power conversion device performs voltage stabilization functions by monitoring input voltage and automatically adjusting switching parameters. This self-service approach eliminates the need for separate voltage adjusting means while maintaining stable operation.
Solution Approach 2:
The control unit serves multiple functions: it controls the switching elements, adjusts operating parameters, and stabilizes input voltage. By combining these functions into a single control mechanism, device complexity is reduced while maintaining voltage stabilization capability.
Data Source
AI summary
A power conversion device has a class-E power conversion circuit. The Class-E power conversion circuit has a Class-E inverter circuit and a rectifier circuit connected to the Class-E inverter circuit and rectifying a high-frequency alternating current generated by the Class-E inverter circuit to a direct current or low-frequency AC voltage. The Class-E inverter circuit includes an AC voltage input unit into which an AC voltage is input, a switch for switching the current on/off, an input choke inductor connected to at least one end of the switch and the AC voltage input unit, and an LC resonance circuit connected to the rectifier circuit. The control unit sets the On-Duty of the switch based on an output current or output power output from the class-E power conversion circuit.