Gate Voltage Control Device Using Merged Isolation Transformers
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Solution Overview
Problem
Existing gate voltage control devices become large in size due to the need for isolation elements between detection and voltage regulator circuits, which are required for each voltage regulator circuit, especially when controlling multiple switching elements.
Innovation Solution
A gate voltage control device configuration using isolation transformers with primary and secondary coils, where the detection circuit transmits signals to the primary circuit, and the primary circuit applies variable voltages to the transformers, allowing the secondary circuits to convert these into direct voltage for the voltage regulator circuits, eliminating the need for dedicated isolation elements for signal transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If isolation elements are inserted in the signal transmission passage between detection circuit and voltage regulator circuit, then isolation performance is improved, but device size increases
Solution Approach 1:
The patent combines the power supply function and signal transmission function into a single isolation transformer. The primary circuit supplies power to the voltage regulator circuit through the isolation transformer while simultaneously transmitting the detection signal through the same transformer, eliminating the need for separate isolation elements for signal transmission.
Solution Approach 2:
The isolation transformer is designed to serve multiple functions: it acts as both a power supply isolation element and a signal transmission element. By making the isolation transformer multi-functional, the patent reduces the total number of isolation elements needed in the system.
2Reliability
If dedicated isolation elements are provided for each voltage regulator circuit, then isolation reliability is improved, but device complexity increases
Solution Approach 1:
The patent merges the power supply path and signal transmission path through the same isolation transformer, so that each voltage regulator circuit shares a common isolation element with the power supply circuit, reducing the overall number of isolation elements required.
Solution Approach 2:
The isolation transformer performs dual functions of power isolation and signal isolation simultaneously, making a single element serve where previously multiple separate elements would have been needed.
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
This configuration reduces the size of the gate voltage control device by eliminating the need for dedicated isolation elements, allowing for compact design while maintaining effective control of gate voltage patterns across multiple switching elements.
Implementation Method 1
each isolation transformer including a primary coil and a secondary coil; The primary circuit is configured to allow a variable voltage to be applied in a plurality of waveform types between both ends of each primary coil
Implementation Method 2
Each secondary circuit converts the variable voltage generated in the corresponding secondary coil to a direct voltage
Data Source
AI summary
A gate voltage control device includes a detection circuit, a plurality of isolation transformers including primary coils and secondary coils, a primary circuit connected to the primary coils, secondary circuits connected to the secondary coils, and voltage regulator circuits connected to the secondary circuits and gates. The detection circuit transmits signal corresponding to detected physical quantity to the primary circuit. The primary circuit cyclically performs applying a variable voltage in a waveform that corresponds to the signal transmitted from the detection circuit between both ends of each primary coil. Each secondary circuit converts the variable voltage generated in the corresponding secondary coil to a direct voltage. Each voltage regulator circuit is powered by the direct voltage converted by the corresponding secondary circuit as a power source, and changes a change-pattern of the corresponding gate voltage according to a waveform of the variable voltage generated in the corresponding secondary coil.