The Shore Power Variable-Frequency Onboard HV/LV System is our company‘s newly developed product, specifically designed for outdoor harsh environments like port docks, shipyards, outfitting berths, vessels, and offshore drilling platforms. It delivers high-reliability frequency-converted power supply under adverse conditions.
The system adopts a fully sealed, triple-layer insulated, ducted cold-air circulation cooling cabin. Internal equipment is fully isolated from the external environment, with ingress protection rated at IP66 for the equipment cabin and IP56 for the cold-air mainframe housing—meeting all demanding port, marine, and offshore conditions. The enclosure is built to standard shipping container dimensions for ease of transport and frequent relocation.
Our proprietary technologies and design features include:
Fully sealed, triple-layer insulated mobile cabin with cold-air cooling.
Instantaneous voltage waveform control: output fluctuation ≤ 0.5 V; during 100% load steps, voltage dip/surge ≤ 3%, recovered within 0.5 fundamental cycles.
Third-order sine-wave filtering at the inverter output to lower impedance and improve power quality.
Master–slave synchronized parallel modules: arbitrarily scalable, no circulating currents.
High-performance components: German SEMIKRON SKIIP 4th‑gen IPM modules; TI TMS320F28335 32‑bit DSP control; 5 MHz fiber-optic drive; latest SVPWM space-vector modulation.
Input Filter‑step-up Unit or 12‑pulse Transformer: Reduces input harmonics, boosts 380 V to ~520 V AC; after rectification provides ~730 V DC.
Input Breaker: Frame-type smart air circuit breaker or MCCB with motorized operation.
6‑pulse/12‑pulse Rectifier Modules: Diode- or thyristor-based with heat-pipe cooling and German EBM fans.
Sine‑wave Filter: 3rd‑order low-pass with low output impedance to support heavy loads.
Inverter Unit: SEMIKRON SKIIP IPM, large electrolytic capacitors, flexible busbars, fiber-optic triggered, CAN-bus feedback.
Main Control Board: TI DSP-based, 6-layer EMC PCB, industrial-grade components, Weco terminals.
Human–Machine Interface (HMI): Touch display showing one‑line diagrams, real‑time parameters, fault logs, and built-in documentation.
Output Transformer: Epoxy-encapsulated dry-type transformer, H-class insulation.
Output Breaker: Frame smart ACB or MCCB with motor drive.
Ducted Cold‑Air Cooling System: 2–4 high-static duct units supplying cool air at base and extracting hot air at top; main cooling unit housed in IP56 enclosure.
Equipment Cabin: Triple-insulated, sealed to IP66; fully protected from dust and moisture.
Input 380 V/50 Hz goes through the step‑up filter, boosting to 520 V, then rectified to 730 V DC. The DC bus is supported by large DC-Link capacitors (30 µF/kW) to maintain THDi ≤ 35% and input PF ≥ 0.95.
The inverter uses 2-level full-bridge configuration with SVPWM via fiber-driven IPM modules, producing a PWM waveform. This passes through the 3rd-order filter to generate clean sinusoidal AC output. Dual-loop feedback controls voltage and current. Output is routed via transformer and breakers.
Model Identification: Shore Power VF HV/LV System
Ordering Info:
Specify application environment: indoor/outdoor, dock/ship/offshore, class approval.
Required rated output power (kVA), input voltage, frequency, power configuration (3∅3‑wire / 3∅4‑wire / 3∅5‑wire).
Output voltage & frequency configuration (3∅3‑wire / 3∅4‑wire).
Peak motor load (kW) and estimated inrush current (A) – crucial for proper design.
We offer free inrush current testing for large systems.
