Inductive Pulse Generator Heat Dissipation at High Repetition Rates
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Solution Overview
Problem
Conventional pulse generators fail to operate continuously at high pulse repetition frequencies with high voltage output while efficiently managing heat dissipation.
Innovation Solution
A pulse generator system utilizing inductive storage devices and MOSFET switches, controlled by a gate driver for high current charging and step signal management, with heat dissipation control through custom heatsinks and Schottky/TVS diodes, enabling continuous high voltage pulse generation at high frequencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional capacitive energy storage devices are used to generate high voltage pulses, then high voltage output is achieved, but the system cannot operate continuously at high pulse repetition frequencies due to heat dissipation issues
Solution Approach 1:
The patent changes the fundamental energy storage parameter from capacitive (V²/2C) to inductive (L I²/2), which fundamentally alters the heat dissipation characteristics. Inductive storage allows continuous high-frequency operation because the energy release mechanism through MOSFET switching does not generate the same thermal constraints as capacitive discharge, thereby resolving the contradiction between heat dissipation efficiency and pulse repetition frequency
Solution Approach 2:
The patent substitutes the conventional capacitive energy storage mechanism with an inductive storage mechanism controlled by electronic MOSFET switching. This substitution enables precise control over energy release timing and duration, allowing continuous operation at high pulse repetition frequencies while managing thermal load through electronic control rather than mechanical or thermal limitations
2Productivity
If burst-mode operation is used to achieve high pulse repetition frequencies, then high frequency pulses are generated, but the system operates as discontinuous pulses rather than continuous operation
Solution Approach 1:
The patent implements continuous operation by maintaining the inductive storage device in a constant charging state with continuous high voltage output capability. The MOSFET switch enables seamless transition between charging and discharging phases without interruption, allowing the system to operate continuously at high pulse repetition frequencies rather than in discontinuous burst modes
Solution Approach 2:
The inductive storage device is continuously charged in advance during the MOSFET conducting state, ensuring energy is always available for immediate pulse generation. This preliminary charging action maintains readiness for continuous high-frequency operation without requiring periodic recharging interruptions characteristic of burst-mode systems
3Shape
If Class E circuits are used to create sinusoidal output, then sinusoidal waveforms are generated, but the system cannot achieve high voltage pulses with high repetition rates
Solution Approach 1:
The patent employs dynamic MOSFET switching control to shape the output waveform. By precisely controlling the gate drive signals and switching timing, the system can generate various waveform shapes including sinusoidal, square, or custom pulses while operating at high repetition rates. The dynamic control allows adaptation of waveform shape independent of repetition frequency constraints that limit Class E circuits
4Productivity
If MOSFET switches are used for high current charging, then high pulse repetition frequencies are achieved, but heat dissipation becomes unmanageable
Solution Approach 1:
The patent converts the heat-generating MOSFET switching action into a beneficial control mechanism. By using the MOSFET's on-resistance and switching characteristics deliberately, the system achieves precise pulse timing and duration control. The heat dissipation is managed through proper heatsink design and thermal management, transforming what would be a harmful thermal effect into an acceptable byproduct of efficient electronic control that enables high repetition frequency operation
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 system achieves continuous high voltage pulse generation with high repetition rates and efficient heat dissipation, maintaining system integrity and performance over extended periods.
Implementation Method 1
an inductive storage device for performing a charging process using a high current received from a first power supply
Implementation Method 2
a switch that is powered by a second power supply and configured to receive a step signal through a gate driver for controlling a repetition rate
Implementation Method 3
Heat dissipation can be controlled by using a custom made heatsink and modifying the casing of the MOSFET switch
Implementation Method 4
Reflections from varying loads can be controlled by using a schottky diode and/or a transient voltage suppression (TVS) diode connected at the output of the MOSFET switch
Data Source
AI summary
A pulse generator system and method, including an inductive storage device configured to perform a charging process using a high current received from a first power supply; and a switch that is powered by a second power supply and configured to receive a step signal through a gate driver for controlling a repetition rate of the inductive storage device charging process and a pulse repetition frequency (PRF) of an output pulse.