High-Efficiency Multiphase Converter with Coupled Inductor Design
Here’s PatSnap Eureka !
Summary
Problems
Existing DC-DC converters for battery energy storage systems, particularly in applications like electric vehicles and renewable energy, face challenges in efficiently boosting low input voltages to higher levels required for battery, fuel cell, and solar applications, often resulting in complex designs and reduced flexibility.
Innovation solutions
A multiphase converter topology incorporating a coupled inductor and active clamp circuit, which includes a main switch circuit, active clamp circuit, and voltage multiplier cell, allowing for high-gain voltage transformation with a wide input voltage range, suitable for both low and high voltage inputs, and enabling flexible operation modes to achieve high efficiency and resilience.
TRIZ Analysis
Specific contradictions:
General conflict description:
Principle concept:
If existing DC-DC converter designs are used to boost low input voltages, then voltage transformation is achieved, but the design becomes complex and flexibility is reduced
Why choose this principle:
The converter is designed with a universal topology that can handle both low voltage (e.g., 48V) and high voltage (e.g., 400V) inputs using the same circuit architecture. The coupled inductor and active clamp circuit work together to provide voltage boosting functionality across different input ranges, eliminating the need for separate converter designs for different voltage levels and thereby improving flexibility while maintaining manageable complexity.
Principle concept:
If existing DC-DC converter designs are used to boost low input voltages, then voltage transformation is achieved, but the design becomes complex and flexibility is reduced
Why choose this principle:
The converter employs dynamic switching control of the main switches and active clamp switches to adapt its operation to different input voltage conditions. The duty cycle and switching frequencies are dynamically adjusted based on the input voltage level, allowing the same circuit to optimally boost both low and high voltages without requiring fixed, complex design modifications for each voltage range.
Application Domain
Data Source
AI summary:
A multiphase converter topology incorporating a coupled inductor and active clamp circuit, which includes a main switch circuit, active clamp circuit, and voltage multiplier cell, allowing for high-gain voltage transformation with a wide input voltage range, suitable for both low and high voltage inputs, and enabling flexible operation modes to achieve high efficiency and resilience.
Abstract
Embodiments are disclosed of a multiphase converter that includes a main switch circuit, an active clamp circuit, a voltage multiplier cell, and an output capacitor. The main switch circuit includes a primary winding of a first coupled inductor; a primary winding of a second coupled inductor connected in parallel with the primary winding of the first coupled inductor and in parallel with an input voltage; a first switch connected between the primary winding of the first coupled inductor and the input voltage; and a second switch connected between the primary winding of the second coupled inductor and the input voltage. The active clamp circuit includes a third switch, a fourth switch, and a first capacitor. The voltage multiplier cell includes a secondary winding of the first coupled inductor, a secondary winding of the second coupled inductor, a second capacitor, a first diode, the first capacitor, and the third switch.