Ozone features extreme oxidizing performance with no secondary pollution, widely applied in drinking water disinfection, municipal sewage treatment, advanced industrial wastewater purification, swimming pool sterilization and food processing sanitation. It serves as a core technology for water treatment disinfection and pollutant degradation. The ozone-generating high-voltage power supply acts as the critical core component of ozone generators, delivering high-frequency high-voltage AC output to dielectric barrier discharge tubes. It ionizes oxygen to produce ozone; its output frequency, voltage amplitude, conversion efficiency and long-term operational stability directly determine ozone concentration, yield, energy consumption, equipment service life, disinfection effectiveness and overall water treatment operating costs. Drinking water and sewage disinfection impose differentiated extreme technical requirements and core challenges on ozone-generating power supplies. 1. High ozone concentration, high efficiency and low energy consumption. Strict industry standards mandate ozone concentration ≥100 mg/L for drinking water disinfection and ≥80 mg/L for advanced municipal sewage treatment. Power supplies must support continuously adjustable output frequency from 1 kHz to 20 kHz and output voltage ranging from 3 kV to 10 kV, achieving ozone yield ≥120 g/kWh to minimize unit power consumption and operational expenses. Flexible frequency and voltage regulation enables precise ozone output adjustment according to real-time disinfection demands. 2. Strong capacitive load adaptability and stable operation. Ozone discharge tubes behave as nonlinear capacitive loads; equivalent capacitance fluctuates dynamically with air pressure, temperature, humidity and oxygen purity, alongside variable dielectric barrier discharge characteristics. Without adaptive control, power supplies suffer resonance detuning, unstable output and component damage. Designs must tolerate ±50% load capacitance variation, adopting resonant soft-switch topology with real-time frequency tracking to maintain optimal resonance and stable high-efficiency ozone generation. 3. High reliability and long service life for continuous 24/7 operation. Waterworks and sewage plants require year-round uninterrupted disinfection; power supply failures cause immediate disinfection shutdowns and severe water safety risks. Operating environments feature high humidity and strong ozone corrosion, which rapidly degrades common insulation materials, metal pins and PCBs. Requirements include MTBF ≥1×10⁵ hours, design life ≥15 years and comprehensive ozone-resistant structural protection for permanent stable performance under corrosive conditions. 4. Wide grid voltage adaptability. Ozone systems deploy in urban waterworks, sewage facilities and remote rural water projects with highly variable power quality. Input voltage coverage of 85 VAC–265 VAC accommodates global grid standards, maintaining stable operation under 70%–130% nominal voltage fluctuation. Integrated active power factor correction ensures power factor ≥0.99 and THD ≤3% to comply with grid harmonic regulations. 5. High protection grade and anti-corrosion engineering. Long-term exposure to humid ozone-rich environments accelerates material aging and insulation degradation. Fully sealed vacuum potting with dedicated ozone-resistant epoxy compounds achieves IP65 protection, isolating internal circuits from oxidative corrosion and moisture penetration for prolonged durability. 6. Comprehensive safety protection and automatic fault recovery. Abnormal operating conditions including load short-circuit, open-circuit discharge, arcing, overheating and gas interruption demand non-bypassable multi-level hardware protection with response time below 1 μs. Transient faults trigger automatic recovery after hazard elimination without manual intervention, guaranteeing uninterrupted disinfection processes. 7. Intelligent control and water treatment system linkage. Automatic water quality management adjusts ozone dosage dynamically based on inflow parameters, water volume, real-time ozone concentration and residual ozone monitoring. Built-in Modbus and Profibus communication enable seamless connection with PLC and online ozone analyzers, supporting closed-loop automatic regulation, remote parameter configuration, real-time status monitoring and fault reporting for fully intelligent unmanned operation. 8. Drinking water compliance and traceability. Ozone equipment for potable water applications must comply with GB 5749 drinking water hygiene standards and GB/T 37894 ozone generator safety specifications. Stable high-precision ozone output ensures disinfection by-products meet regulatory limits; embedded data storage records operational history for at least one year to fulfill health supervision traceability requirements. This methodology establishes a complete technical framework covering high-efficiency resonant topology, capacitive load adaptive optimization, ozone corrosion resistance and long-life reliability design. It standardizes high-voltage power supply development for drinking water disinfection, municipal sewage treatment and industrial wastewater ozone systems, supporting domestic core component localization and performance upgrading. Addressing key challenges including energy efficiency, high ozone yield, capacitive load instability and oxidative corrosion, the universal design adopts series resonant soft-switch inverter topology + fully digital resonant frequency tracking + ozone-resistant fully sealed potting, enhanced by adaptive load optimization and full safety protection. It overcomes traditional limitations such as low efficiency, poor load adaptability, weak corrosion resistance and short service life through eight core design principles: 1. High-efficiency series resonant soft-switch architecture optimized for capacitive discharge loads, achieving conversion efficiency above 95% across full operating range. 2. Fully digital real-time resonant frequency tracking algorithm to lock optimal operating points despite dynamic load fluctuations. 3. High-concentration ozone output enhancement via high-frequency precise voltage control, improving dielectric barrier discharge uniformity and ionization efficiency for yield exceeding 120 g/kWh. 4. Dual anti-corrosion protection combining ozone-resistant potting materials and fully sealed metal enclosures. 5. Extended lifespan through extreme component derating, wear-part elimination and redundant protection to reach 15-year operational durability. 6. Non-bypassable multi-level hardware safety protection with automatic recovery for transient fault scenarios. 7. Wide-range grid compatibility and low-harmonic performance via APFC, maintaining high power factor and minimal current distortion. 8. Water treatment compliance design with complete data traceability and intelligent system linkage for drinking water safety supervision.
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