High-Voltage Inverter Control for Programmable 1 kV Waveforms
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Solution Overview
Problem
Existing high-voltage power supply systems are limited by nominal values of operational amplifiers and 24V power sources, unable to generate programmable voltages up to 1 kV with frequencies in the MHz range, and lack flexibility in waveform generation and output pin control, making them unsuitable for advanced synchrotron and laboratory experiments.
Innovation Solution
A high-voltage power supply system incorporating a high-voltage regulator, function generator, and triggering circuit, featuring a microcontroller, digital-to-analog converter, high-voltage DC-DC converter, MOSFET switches, and electromechanical switches, enabling programmable high-voltage generation and flexible waveform control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a low-voltage programmable power supply with operational amplifiers is used, then the system is simple and stable, but the output voltage is constrained to low levels (0-24V) and cannot reach the required 1 kV level
Solution Approach 1:
The system is divided into separate functional modules: a low-voltage control section (Arduino with DACs and operational amplifiers) and a high-voltage generation section (H-bridge inverter with MOSFETs). The low-voltage section generates control signals while the high-voltage section, powered by a separate 48V power source, generates the required high-voltage output through the inverter circuitry.
Solution Approach 2:
The Arduino microcontroller acts as an intermediary between the user interface and the high-voltage generation system. It processes user inputs, generates appropriate PWM control signals, and regulates the high-voltage output through the H-bridge inverter, enabling safe and precise high-voltage control without direct human interaction with high-voltage components.
2Reliability
If a fixed-voltage power supply is used, then the system is stable and reliable, but it lacks the flexibility to generate programmable voltages up to 1 kV with kHz-MHz frequencies
Solution Approach 1:
The system transitions from static voltage output to dynamic, programmable voltage and frequency control. The Arduino microcontroller enables real-time adjustment of output parameters through PWM modulation of the H-bridge inverter, allowing the system to adapt voltage levels and frequencies programmatically while maintaining stable operation through controlled feedback.
Solution Approach 2:
The system enables dynamic changes in output parameters (voltage, frequency, waveform) through programmable control. The Arduino microcontroller modifies operational parameters in real-time based on user requirements, transforming the power supply from a fixed-output device to a versatile, programmable high-voltage source capable of operating across wide parameter ranges.
3Extent of automation
If a 2-channel programmable voltage regulator with DACs is used, then the system can be controlled digitally, but the output voltage remains limited by the nominal values of operational amplifiers and cannot exceed 24V
Solution Approach 1:
The system replaces direct digital-to-high-voltage conversion with a two-stage approach: first, the Arduino DACs generate low-voltage control signals; second, these control signals modulate the H-bridge inverter switches (MOSFETs) to generate high-voltage output. This substitution of direct conversion with indirect PWM-based inversion enables high-voltage generation while preserving digital control capabilities.
4Adaptability or versatility
If the waveform is interrupted during application from one direction, then the system can change field direction orthogonally, but there is amplitude loss and discontinuity
Solution Approach 1:
The H-bridge inverter circuit enables periodic switching between different output polarities through controlled MOSFET activation sequences. This periodic action allows the system to generate continuous alternating waveforms with orthogonal field direction changes, maintaining amplitude stability through synchronized switching that prevents waveform interruption or discontinuity.
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 programmable high-voltage outputs up to 1000 V with kHz frequency ranges, allowing orthogonal field direction changes and seamless waveform transitions, compatible with synchrotron and laboratory experiments.
Implementation Method 1
a digital-to-analog converter in communication with the microcontroller
Implementation Method 2
a high-voltage DC-DC converter in communication with the digital-to-analog converter
Implementation Method 3
the function generator includes a high-voltage inverter including one or more MOSFET switches
Implementation Method 4
a high-voltage inverter including one or more MOSFET switches
Implementation Method 5
The triggering circuit includes one or more high-voltage electromechanical switches
Data Source
AI summary
A high-voltage power supply system including a high-voltage regulator, a function generator, and a triggering circuit. The high-voltage regulator includes a microcontroller, a digital-to-analog convertor in communication with the microcontroller, and a high-voltage DC-DC converter in communication with the digital-to-analog converter. The function generator includes a high-voltage inverter including one or more MOSFET switches. The high-voltage inverter is in communication with the microcontroller of the high-voltage regulator. The triggering circuit includes one or more high-voltage electromechanical switches.