Sensoryên Fluxgate di SST-da: Serbestyayî & Parastina

SST nî çi ye?

SST ya Solid-State Transformer dike, an jî Power Electronic Transformer (PET) dike. Dîrokê dixwazinê, SST-yek taybetand bixweberên 10 kV AC ser rasteyê serekeyî û derbarê DC-ya navnîşandî 800 V dakê. Prosesê bihêvînê li ser du rêjeyê: AC-to-DC û DC-to-DC (baxandin). Herêmekê bikaranîna ji bo pirantiyên yekbûyî an integrasyonê ser servers, rêja yekem a bike ji 800 V bê 48 V hewce ye.

SSTs êk malperên herêmên transformersên tradîsyonalan bibirîne û tezmînên piştguhî yên ku heta wateyan dikin, wek compensasyonê reaktîf, harmonic mitigation, û bidirectional power flow control. Ev êk pir tiştîn di vêndiyên guh girtîn de bikar in, wek integrayonê gridan ên energyên renewable, EV charging stations, û computing centers (mînanda AIDC).

SST: Çareserzaniya Bîrîn ji bo Dilan ên AIDC ên Guh Girtîn

SST êk tredînci generasyon ên high-voltage DC power distribution solution dibîne.

• First-generation HVDC malperên transformerên power-frequency bikibe, tenha Uninterruptible Power Supply (UPS) side biceribîne.

• Second-generation solutions, mînanda Panama power supply, transformerên power-frequency bikibe bide bide phase-shifting transformer, integrayon barkerdibîne.

• Third-generation SST transformerên power-frequency bikibe bide high-frequency transformer, integrayonê ya girîng dibîne.

Qalbijar êk SST li ser werdigirina struktûra iron-core û winding ên transformersên tradîsyonalan, tenha bikaribîna devicesên semiconductor, mînanda IGBTs û SiC. SST avadarka bêtir dibîne:

• Conversion efficiency (end-to-end efficiency improved by over 3 percentage points),

• Construction time (only 30% of traditional UPS solutions),

• Footprint (reduced by more than 50% compared to traditional UPS),

• Renewable energy integration (direct green power supply without additional conversion modules).

Teorîk, ji bo kerdestkirina ji bilîgê voltage û current conversions, SST lossan ên power transmission minîmise, tevlî çareserzan dibîne ji bo pain points ên power distribution di dilan ên high-power data center de.

Bikaranîna High-Precision Fluxgate On-Board Current Sensors di SST de

Precise Current Sensing for Power Conversion and Control

AC/DC û DC/DC converters êk SST li ser algorithmsên modulation advanced û closed-loop control bikibe. Upper limit êk control accuracy li ser sensor precision hatine hate. Near-"absolute truth" current signal êk fluxgate sensors form foundation for accurate controller calculations (e.g., generating compensation signals, computing active and reactive power). Low temperature drift ensures this accuracy is maintained not just under lab conditions, but across the full operating temperature range. As SST power modules generate significant heat during operation, environmental temperatures fluctuate dramatically. The low-drift characteristic ensures consistent control references from startup to full load, preventing efficiency degradation or control instability due to sensor drift.

Accurate Overcurrent and Short-Circuit Protection

Power semiconductor devices (e.g., SiC MOSFETs) inside SSTs operate at high switching frequencies but have limited tolerance to overcurrent. Fault currents must be interrupted within microseconds. The fast response of fluxgate sensors acts like a high-speed camera, instantly capturing current spikes, providing critical reaction time for drive and protection circuits to prevent cascading device failures. This not only ensures safety but also enhances system dynamic performance. Rapid current feedback allows the controller to quickly suppress disturbances caused by load transients, maintaining stable bus voltage.

Strong Noise Immunity for Data Accuracy and Reliability

SST itself is a powerful source of high-frequency electromagnetic interference. Traditional current sensors (e.g., Hall-effect sensors) are susceptible to such noise, resulting in signal spikes that can cause control malfunctions or distorted monitoring data. Fluxgate technology, based on magnetic core saturation principles, inherently suppresses out-of-band noise. It can clearly extract the desired fundamental or specific-band current signals from complex electromagnetic environments, providing reliable data for condition monitoring and health management systems.

Additionally, the on-board design of fluxgate sensors allows direct integration onto control PCBs, reducing system volume and optimizing layout. This is ideal for SST’s pursuit of high power density and miniaturization.