Research on Key Technologies of High Voltage Power Supply in Controlling Electrospinning Continuity

1. Core Challenges of Spinning Continuity and Mechanism of High Voltage Power Supply
Electrospinning, as a nanofiber fabrication technology, fundamentally relies on the stretching and solidification of polymer solutions under high-voltage electric fields. The stability of the high-voltage power supply directly affects jet formation, Taylor cone evolution, and fiber deposition continuity. Experimental studies show that when the electric field strength falls below the critical value (typically 10-30 kV), polymer droplets cannot overcome surface tension to form stable jets. Voltage fluctuations exceeding ±1% cause jet whipping trajectory deviations, increasing fiber diameter dispersion by over 20%.
2. Key Technical Optimization Strategies for High Voltage Power Systems
1. Enhanced Dynamic Response Characteristics 
Modern high-frequency switching power supply technology reduces response time to the microsecond level. Real-time monitoring of jet impedance changes enables closed-loop voltage regulation. For instance, adaptive systems using digital signal processors (DSP) can suppress voltage fluctuations within 0.5%.
2. Multi-Parameter Coupling Control Model 
Research indicates that spinning continuity is influenced by coupled factors such as voltage, flow rate, and ambient humidity. Machine learning-based control models (e.g., random forest algorithms) can predict optimal voltage curves under varying conditions, reducing fiber breakage to 0.3 events/hour.
3. Composite Waveform Output Technology 
Traditional DC high voltage limits jet stretching to single points. Novel power supplies employing pulsed DC (1-10 kHz) or superimposed AC components (5%-15% amplitude) significantly improve fiber alignment. Experimental data show waveform modulation reduces fiber diameter variation coefficients from 12.7% to 6.9%.
3. Breakthroughs in Industrial Applications
For mass production, voltage balancing in multi-needle array systems becomes critical. Combining distributed power architectures with optical synchronization detection technology achieves voltage deviations within ±0.3 kV for 128-needle systems, enabling single-machine daily output exceeding 10 kg. Additionally, intelligent power systems with self-diagnostic functions detect arc discharge and solution leakage in real time, increasing mean time between failures (MTBF) to over 5000 hours.
4. Future Technological Trends
With the adoption of wide-bandgap semiconductor devices (e.g., SiC MOSFET), next-generation high-voltage power supplies are moving toward miniaturization (40% volume reduction) and high-frequency operation (MHz level). The integration of digital twin technology reduces virtual commissioning time by 70%, enabling rapid iteration of complex process parameters.