Power Converter Voltage Division for Vibration Resistance
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Solution Overview
Problem
Power converters face challenges in withstanding vibrations, particularly in mobile applications like automobiles and railways, and existing solutions struggle to easily change impedance constants for generating divided voltages while maintaining mechanical strength.
Innovation Solution
A power converter design that includes a power semiconductor module with a voltage dividing circuit board generating a divided voltage between its terminals, which is transmitted to a gate driving circuit to adjust the driving speed of the power semiconductor switching element, allowing for easy modification of impedance constants and enhanced mechanical strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If capacitors are molded in a single package to form an element module, then mechanical strength to withstand vibrations is improved, but it becomes difficult to change constants of impedance elements for generating divided voltages
Solution Approach 1:
The patent divides the voltage dividing circuit into separate components (first and second impedance elements) that are not molded together in a single package. This segmentation allows each impedance element to be independently replaceable, enabling changeability of impedance constants while maintaining mechanical strength through proper mounting structures.
Solution Approach 2:
The patent enables dynamic adjustment of impedance constants by allowing the impedance elements to be replaced based on different operating conditions or requirements. This dynamic adaptability is achieved through a mounting structure that facilitates easy replacement of individual impedance elements without replacing the entire module.
2Strength
If impedance elements are fixed in a molded package, then mechanical strength is improved, but ease of manufacture for different impedance constants deteriorates
Solution Approach 1:
By segmenting the voltage dividing circuit into separate impedance elements with individual mounting structures, the patent enables easy manufacturing of different impedance configurations. Each impedance element can be manufactured and tested independently, then mounted or replaced in the circuit without remolding the entire package.
Solution Approach 2:
The patent facilitates discarding and recovering of impedance elements by designing a mounting structure that allows individual impedance elements to be easily removed and replaced. This enables rapid prototyping and manufacturing adjustments where impedance elements can be swapped based on design requirements without wasting the entire module.
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
The solution enables easy adjustment of impedance constants for generating divided voltages while ensuring mechanical strength to withstand vibrations, improving the performance and reliability of power converters in various applications.
Implementation Method 1
a voltage dividing circuit board 16K to generate a divided voltage obtained by detecting a voltage between the first signal input terminal and the third signal input terminal
Data Source
AI summary
A power semiconductor module having switching elements includes: a collector main terminal and a collector auxiliary terminal connected to a collector potential of the switching element; a gate auxiliary terminal connected to a gate potential of the switching element; and an emitter main terminal and an emitter auxiliary terminal connected to an emitter potential of the switching element. A power converter includes a voltage dividing circuit board that generates a divided voltage obtained by dividing a voltage between the collector auxiliary terminal and the emitter auxiliary terminal and transmits to a gate driving circuit. The voltage dividing circuit board is electrically connected to the collector auxiliary terminal and the emitter auxiliary terminal. A gate driving circuit changes a driving speed of the switching element according to the divided voltage.