High-Frequency Products
Ultra High-Speed High Voltage Generator (HVG / APS)
Stable high-voltage generation defines photon energy spectrum, image contrast and quantitative reliability in X-ray imaging systems. STRETTA’s High Voltage Generator (HVG) preserves spectral stability even under the extreme dynamic load conditions created by multi-beam emission architectures.
Technology Context
High Voltage as the Foundation of Imaging Stability
In conventional CT systems, high-voltage generators operate under relatively steady load conditions during exposure. The generator delivers continuous energy while the rotating X-ray tube produces projections.
Multi-beam emission architectures fundamentally change the electrical load environment.
Instead of constant power demand, the generator must handle rapid transitions from near-zero to high power, frequent emitter switching events and high repetition rates across distributed emission sources.
These conditions create highly dynamic load profiles that conventional generator architectures were not designed to handle.
Spectral CT accuracy begins with voltage stability.
STRETTA’s HVG maintains stable photon energy even under extreme pulsed load conditions.
Architectural Constraint
Voltage Stability Under Rapid Load Transitions
STRETTA’s multi-energy pulse modulator replaces thyratron switching with a modular semiconductor-based architecture. Pulse energy is controlled through PWM-based modulation, allowing precise adjustment of pulse amplitude and duration.
Adjustable pulse shaping enables optimization for specific application requirements across different system platforms. Solid-state switching enables precise control of pulse energy and timing.
Power System Design
Generator Architecture for Dynamic Emission Systems
The HVG uses a cascade conversion architecture that supports stable voltage scaling while minimizing transformer stress during rapid switching cycles.
Modular transformer configurations allow the generator to adapt to different duty cycles across medical and security imaging platforms.
This architecture enables reliable operation even when multiple emitters switch rapidly across distributed emission arrays.
Dynamic Load Control
Closed-Loop Regulation for Pulsed Operation
High-speed regulation electronics continuously monitor generator output and compensate load fluctuations during emitter switching events.
This closed-loop control stabilizes voltage output and preserves photon energy consistency during fast pulsed operation.
Stable photon energy is essential for reliable spectral imaging and material discrimination.
Operation Under Dynamic Load Conditions
Validation
Prototype evaluations under pulsed conditions representative of distributed emitter switching have validated closed-loop voltage stability and effective dynamic load compensation.
These tests confirm that stable high-voltage performance can be maintained even under demanding multi-beam switching conditions.
The HVG forms the energy backbone of STRETTA's multi-beam architectures and enables advanced imaging modalities such as spectral CT, dual-energy imaging and future photon-counting detector integration.