This letter proposes a new frequency-domain thermal model for online junction temperature estimation of insulated-gate bipolar transistor (IGBT) modules. The proposed characterizes the behavior an IGBT module by linear time-invariant (LTI) system, whose frequency response is obtained applying fast Fourier transform (FFT) to time derivative transient impedance from reference position module. then estimated using responses LTI system and heat sources Simulation results show that method...

Pole-to-pole dc short circuit fault blocking capability is a major concern when modular multilevel converters (MMCs) are applied in high voltage direct current (HVDC) transmission systems. Traditional MMCs based on half-bridge submodules (HBSMs) cannot block the current, thus needing expensive breakers (DCCBs). There improved submodule topologies that can faults, but usually with significantly increased device cost. This paper proposes an HBSM-based MMC (HB-MMC) which needs fewer extra...

The five-level hybrid clamped inverter (5L-HC) is a promising new topology for medium-voltage applications. However, to minimize the capacitors and ensure good performance of converter, capacitor voltage ripples, as well balancing control, need further study. Based on carrier-phase-shift PWM (CPS-PWM), this paper gives rigorous analysis ripple characteristics all (which consist three groups: flying capacitors, central dc capacitor, upper lower capacitors) under both normal unbalanced...

Accurate, and effective traffic forecasting is vital for smart systems, crucial in urban planning management. Current Spatio-Temporal Transformer models, despite their prediction capabilities, struggle with balancing computational efficiency accuracy, favoring global over local information, handling spatial temporal data separately, limiting insight into complex interactions. We introduce the Criss-Crossed Dual-Stream Enhanced Rectified model (CCDSReFormer), which includes three innovative...

The information of the remaining useful lifetime (RUL) insulated-gate bipolar transistors (IGBTs) is for effective maintenance a power converter before failure device. Thermo-mechanical stresses are major cause to aging weak points packaging that determines an IGBT module. Traditionally, RUL module simply predicted based on cyclic excursion junction temperature and case temperature, which usually estimated by using resistor-capacitor circuit thermal model. This method might not correctly...

This paper proposes a digital filter model to characterize the thermal behaviors of insulated-gate bipolar transistor (IGBT) modules. The impedances IGBT modules are characterized by low-order infinite impulse response (IIR) filters. Compared conventional Foster-type equivalent circuit (TEC) model, IIR can greatly improve accuracy transient junction temperature estimation for filters be implemented easily and efficiently in processing systems real-time

Digital processing poses a considerable time delay on controllers of induction motor (IM) driving system, which degrades the effects torque/flux decoupling, slows torque response down, or even makes entire system unstable, especially when operating at low switching frequency. The existing methods, such as feed-forward and feed-back decoupling methods based proportional integral controller (PI), have an intrinsic disadvantage in compromise between high performance Besides, digital cannot be...

Balancing accuracy with computational efficiency is paramount in machine learning, particularly when dealing high-dimensional data, such as spatial-temporal datasets. This study introduces ST-MambaSync, an innovative framework that integrates a streamlined attention layer simplified state-space layer. The model achieves competitive prediction tasks. We delve into the relationship between mechanisms and Mamba component, revealing functions akin to within residual network structure....

As an important mission of space stations, science experiment usually requires effective temperature control measures. Scientific experimental express rack (ER) is a general design for experiment. In some scientific experiments, the local target element or surrounding exceed heat sink range, heating and cooling measures are required. Thermoelectric cooler (TEC) has high reliability low complexity, which applicable in gravity conditions. ER, entire indirectly heated cooled by ambient air,...

In this paper, a 10-bit 60MHz-BW continuous-time (CT) Delta-Sigma ADC is presented. A 3 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">rd</sup> -order 3-bit architecture with Cascaded Integrators Feed-Forward (CIFF) adopted for the consideration of speed, performance, stability, power consumption and tolerance to non-idealities. The feedback digital signal delayed by one clock period absorb excess loop delay (ELD), zero-order path added retain...