Dental Cone Beam Computed Tomography (CBCT) is the core imaging device in clinical stomatology. With the advantages of three‑dimensional tomography, low radiation dose, high spatial resolution and compact size, it is widely applied in full clinical dental scenarios including preoperative planning for dental implantation, orthodontic diagnosis and treatment, endodontic disease diagnosis, maxillofacial surgical evaluation, and periodontal therapy. The compact high‑voltage generator serves as the key power component of dental CBCT equipment, supplying stable DC high voltage to the X‑ray tube. Its overall size, integration level, dose output stability and tube voltage control accuracy directly determine the device footprint, imaging clarity, lesion detection rate and patient radiation exposure dose. Current high‑end dental CBCT systems require the high‑voltage generator to provide an output voltage range of 60 kV~120 kV and a tube current range of 2 mA~20 mA, with tube voltage control accuracy better than ±0.5% and dose output linearity R² ≥ 0.999. Meanwhile, the entire unit must be compact enough to be directly mounted on the rotating gantry of CBCT to accommodate limited installation space. Traditional power‑frequency high‑voltage generators and separated high‑frequency high‑voltage generators suffer from large volume, low integration, poor dose stability and incompatibility with rotating gantries, failing to meet the miniaturization and integrated development demands of modern dental CBCT. All designs must strictly comply with IEC 60601‑1 general medical electrical safety standard, GB 9706.3 specific safety requirements for medical diagnostic X‑ray equipment, and GB 9706.242 Medical electrical equipment — Part 2‑42: Particular requirements for basic safety and essential performance of computed tomography equipment. The design shall also conform to relevant technical specifications for Class II / Class III medical device registration issued by the NMPA. Addressing the core clinical requirements and technical challenges of compact high‑voltage generators for dental CBCT, this methodology establishes a full‑process general technical framework covering integrated design, topology optimization, dose stability control, low‑dose imaging adaptation and medical safety compliance. It satisfies the high‑voltage power supply demands of various dental CBCT devices and provides standardized design guidelines for domestic substitution and performance upgrading of local dental CBCT products. Focusing on miniaturization, high integration, gantry compatibility and stable dose output for dental CBCT applications, this methodology adopts a main architecture integrating high‑frequency resonant inversion, high‑voltage transformer, filament power supply and control unit into one compact assembly, combined with a full‑bridge LLC resonant inverter topology. This fundamentally overcomes the drawbacks of conventional separated generators such as bulky size, low integration and poor mountability on rotating structures. It enables all‑in‑one integration of the high‑voltage generator, X‑ray tube and cooling system, allowing direct installation on the CBCT rotating gantry, significantly reducing overall equipment size while improving dose stability and image quality. Five core design principles are implemented. First, the full‑bridge LLC resonant topology achieves zero‑voltage switching (ZVS) on primary switches and zero‑current switching (ZCS) on secondary rectifiers across wide load ranges, featuring ultra‑low switching loss, high efficiency and low electromagnetic interference. Higher switching frequency greatly reduces the size of magnetic components, forming the technical foundation for miniaturization. Fundamental harmonic analysis optimizes resonant parameters with a resonant frequency of 200 kHz~300 kHz, ensuring continuous soft switching throughout the full voltage range of 60 kV~120 kV and full current range of 2 mA~20 mA. Overall efficiency exceeds 96%, lowering heat generation, simplifying cooling design and further shrinking physical dimensions. Second, fully integrated mechanical design consolidates the high‑voltage inverter, high‑voltage transformer, voltage multiplier, filament power supply, control & protection circuits and high‑voltage sampling modules inside a single sealed housing. A three‑dimensional layered layout breaks the limitations of traditional planar structures: the bottom layer accommodates power inversion and filtering; the middle layer integrates the transformer and multiplier; the top layer contains control and sampling circuits. Insulating supports separate each layer. The anode and cathode interfaces of the X‑ray tube are directly integrated onto the generator output terminals, eliminating high‑voltage cables and their associated parasitic parameters, voltage drops and safety risks while minimizing installation volume. Third, integrated design of the high‑voltage transformer and multiplier adopts pot‑type magnetic cores and interleaved winding technology. Secondary windings, multiplier capacitors and rectifier diodes are enclosed within a single high‑voltage insulation chamber filled with vacuum‑poured epoxy resin, ensuring reliable insulation while shortening high‑voltage loops and reducing parasitics and size. High‑thermal‑conductivity alumina epoxy with thermal conductivity ≥ 2.0 W/(m·K) efficiently transfers heat from magnetic and rectifying components to the housing for enhanced cooling. Fourth, the filament power supply is integrated internally using a high‑frequency isolated inverter topology, sharing the same digital control platform with the main high‑voltage inverter to achieve synchronized dual closed‑loop regulation of tube voltage and tube current. The filament output operates at the same potential as the high‑voltage terminal, eliminating extra insulation volume and risks and further improving integration density. Fifth, optimized compatibility with rotating gantries adopts a flat, lightweight mechanical structure with the center of gravity aligned with the gantry rotation axis to prevent eccentric vibration during scanning. The monolithic milled aluminum housing offers excellent vibration and shock resistance to withstand continuous rotation and frequent start‑stop cycles. The total weight is controlled within 3 kg to reduce gantry load and enhance operational stability. Refined optimization of integrated packaging is central to this methodology. Targeting miniaturization and high reliability for dental CBCT, systematic guidelines are established in thermal management, high‑voltage insulation and electromagnetic compatibility. In high‑density thermal design, full conductive heat dissipation ensures efficient cooling in confined spaces and prevents performance degradation caused by local hotspots. All power devices, transformers and rectifiers are tightly bonded to the aluminum housing via high‑thermal‑conductivity pads; the housing acts as a heat sink connected directly to the X‑ray tube cooling system to rapidly dissipate heat and maintain component temperatures within safe derating limits. Power components are evenly distributed to avoid concentrated heat accumulation. PCBs use 4‑layer, 2 oz heavy copper construction to spread heat laterally and improve temperature uniformity. High‑efficiency soft‑switching topologies minimize total power loss from the source, keeping the maximum housing temperature below 55 °C even under continuous full‑power operation, complying with dental medical safety standards. In high‑voltage insulation design for compact integration, graded insulation matches material selection and creepage distances according to voltage levels. Low‑voltage control sections are physically isolated from high‑voltage zones. Adequate clearances and creepage distances comply with medical equipment requirements. Transformers, multipliers and sampling circuits are fully vacuum‑potted in epoxy resin to eliminate air gaps and prevent corona discharge and partial breakdown. All high‑voltage parts undergo surface passivation to eliminate sharp‑point discharge risks. Internal high‑voltage connections adopt smooth transitions without sharp corners to avoid electric field concentration, while internal insulating coating further enhances dielectric strength. In electromagnetic compatibility design, a fully sealed aluminum shielding enclosure provides shielding effectiveness ≥ 60 dB to suppress radiated interference from the inverter. A three‑stage EMI filter at the input suppresses differential‑mode, common‑mode and spike noise, preventing conducted interference from affecting sensitive CBCT detectors. PCB layout strictly separates power loops from control circuits with single‑point grounding to eliminate ground loops. High‑voltage sampling uses differential shielding to improve noise immunity and guarantee precise voltage regulation. Dose stability control ensures reliable low‑dose high‑quality imaging in clinical dentistry. Comprehensive strategies cover dual closed‑loop regulation of tube voltage and tube current, dose linearity optimization and low‑dose exposure adaptation. An FPGA‑based fully digital dual closed‑loop control architecture implements inner filament current regulation and outer tube voltage regulation with synchronous linkage. 24‑bit high‑precision ADCs sample real‑time voltage and current data at a control frequency of 10 kHz, achieving tube voltage accuracy better than ±0.3% and tube current accuracy better than ±1 %. Feedforward compensation continuously monitors grid voltage fluctuations and dynamically adjusts inverter parameters to maintain stable dose output under variable power supply conditions. Dose linearity is optimized through a three‑dimensional calibration model correlating tube voltage, tube current, exposure time and actual radiation dose. Multi‑point correction ensures dose linearity R² ≥ 0.999 and dose repeatability better than ±2 %. Ultra‑precise exposure timing controlled by FPGA achieves microsecond accuracy within ±10 μs across 10 ms~10 s exposure ranges, ensuring reliable low‑dose short‑shot performance. Real‑time temperature compensation dynamically adjusts output parameters according to internal component temperatures, keeping dose consistency within ±2 % after continuous multiple scans and preventing image drifting. Low‑dose imaging features pulsed exposure control enabling high‑frequency intermittent high‑voltage output synchronized with gantry rotation, reducing radiation exposure by over 30 % compared with continuous mode. Low‑ripple high‑voltage output with multi‑stage filtering suppresses ripple below 0.1 %, ensuring pure X‑ray energy spectra, reducing unnecessary soft radiation and improving image contrast at lower doses. Programmable multi‑mode output parameters adapt tube voltage, current and exposure time to different anatomical regions (teeth, periodontium, orthodontics, maxillofacial areas) and patient ages. Full panoramic adult dose is controlled below 100 μSv, while pediatric exposure can be reduced by more than 50 %, well below national regulatory limits. Medical safety compliance and reliability form essential constraints for clinical dental applications. Complete design frameworks cover electrical safety, interlock protection and environmental adaptability. Electrical safety strictly follows the IEC 60601 series with double insulation. Dielectric withstand voltage between high‑voltage circuits, low‑voltage controls and patient accessible parts exceeds twice the maximum output voltage. Patient leakage current is limited below 10 μA and equipment leakage current below 100 μA, far below standard thresholds. All high‑voltage components are fully sealed with no exposed live parts to ensure absolute safety for operators and patients. A six‑level redundant protection system includes input over/under voltage protection, output overvoltage protection, overcurrent / short‑circuit protection, overtemperature protection, arcing protection and filament open‑circuit protection. All protections adopt dual hardware‑software redundancy with fault response faster than 1 μs. Safety interlocks including emergency stop, door interlock and exposure readiness instantly cut high‑voltage output during faults or improper operation to block X‑ray emission completely. All critical components apply medical‑grade derating with voltage stress ≤70 %, current stress ≤60 % and temperature stress ≤80 % of rated values to minimize failure probability. Full validation includes high/low temperature cycling, humidity testing, vibration/shock testing and long‑term aging verification, achieving an MTBF ≥ 15,000 hours suitable for continuous operation in dental clinics. Full EMC compliance with GB/T 18268.1 ensures stable performance in complex electromagnetic environments of hospitals and clinics. Addressing core clinical demands and technical bottlenecks of compact high‑voltage generators for dental CBCT, this methodology delivers a complete technical system covering integrated packaging, topology advancement, dose stability regulation and safety compliance. It thoroughly solves traditional problems such as large volume, low integration and inconsistent dose output. Three‑dimensional integrated miniaturization enables direct installation on rotating CBCT gantries. Dual closed‑loop control achieves ±0.3 % tube voltage precision and dose linearity above 0.999. Pulsed exposure and low‑ripple design realize low‑dose high‑resolution imaging. Fully compliant with modern clinical requirements for dental CBCT, this solution supports widespread domestic adoption and provides core technical foundations for localized innovation and upgrading of dental imaging equipment.