Power Electronics & EE
Power electronics fundamentals, DC-DC/AC-DC converters, inverter/motor drives, magnetics, control, and standards.
280 topics · 0 with articles
Intern Engineer· 40
- Active Gate Drive for dV/dt Control
- Bootstrap Capacitor Charging and High-Side
- Common-Source Inductance Effect on dV/dt
- Current Sense Amplifier Selection and Noise
- Current Sensing: Shunt, CT, Hall Effect
- Dead-Time Insertion and Body Diode Loss
- Derating Practice for Reliability (MIL-HDBK-217)
- Desaturation Detection for IGBT Circuits
- Device Paralleling: Current Sharing
- Device Parasitics: Coss, Crss, Loop Inductance
- EMI Filter Design: Pi, T, CM + DM Choke
- EMI Measurement Setup: CISPR 22 Class B
- ESD Protection for Gate Driver Input
- GaN Device Common-Mode Noise Mitigation
- GaN HEMT: Gate Injection Transistor (GIT)
- GaN HEMT: Normally-On vs. Normally-Off
- Gate Drive: Bootstrap, Optocoupler, Isolated IC
- High-Voltage Differential Probe Techniques
- IGBT Gate Resistor Effect on Turn-On/Off
- IGBT: VCE_sat, Tail Current, Gate Charge
- Ideal vs. Real Switch: On-State and Switching Loss
- Isolated Gate Driver IC (ACPL, ADuM, Si8271)
- Kelvin-Source Gate Drive Connection
- Lossless Snubber with Diode and Capacitor
- MOSFET Body Diode and Reverse Recovery
- Overvoltage Clamping: TVS, MOV, Zener
- PCB Kelvin Sense for Accurate Measurement
- PCB Layout: Minimum Switching Loop Area
- Power MOSFET: Rds(on), Qg, Gate Charge Curve
- Power Module Datasheet Reading: SOA, Zth
- Shoot-Through Prevention Circuit Design
- Short-Circuit and Overcurrent Protection
- SiC Body Diode Usage and Paralleling
- Silicon Carbide (SiC) MOSFET vs. Si MOSFET
- Snubber: RCD, RC, Active Lossless
- Solid-State Circuit Breaker (SSCB) Design
- Switching Frequency vs. Efficiency Trade-off
- Thermal Resistance Chain: Rthj, Rthcs, Rthsa
- Undervoltage Lockout (UVLO) Circuit
- WBG Thermal Characterization Methods
Junior Engineer· 40
- 48V-to-12V Bidirectional Converter
- Active Clamp Flyback (ACF) for ZVS
- All-SiC Full-Bridge for High-Power DCDC
- Battery Formation Charger Design
- Bidirectional Buck-Boost for Battery Apps
- Boost Converter: Duty Cycle, Gain, CCM/DCM
- Bootstrap Capacitor Refresh Issue in Buck
- Buck Converter Inductor and Capacitor Sizing
- Buck Converter: CCM and DCM Analysis
- Buck-Boost: Inverting, SEPIC, Cuk Topology
- CLLC Bidirectional Resonant Converter
- Cascade Buck-Boost for Wide Input Range
- Current Ripple and Output Voltage Ripple
- DCDC for 48V Automotive (Mild Hybrid)
- Diamond FET Ultra-High-Voltage Concept
- Dual Active Bridge (DAB) for Bidirectional DC-DC
- Feedforward Compensation for Input Rejection
- Flyback Converter: Operating Modes and Transformer
- Flyback: RCD Snubber Sizing and Clamp Voltage
- Gallium Oxide (Ga2O3) Future DCDC Device
- High-Efficiency Design for 80+ Titanium PSU
- High-Frequency Quasi-Resonant (QR) Flyback
- Hybrid Switched-Capacitor Converter
- Input Ripple Current and EMI Filter Design
- Interleaved Multi-Phase Buck for Low Ripple
- LLC Operating Modes: Above and Below Resonance
- LLC Resonant Converter: Tank Design
- Multi-Output Flyback: Cross-Regulation
- Multi-Phase VRM: Phase Shedding, Balancing
- Output Capacitor: ESR, ESL Impact on Stability
- Phase-Shifted Full-Bridge (PSFB) Topology
- Resonant Frequency Calculation for LLC
- Single-Inductor Multi-Output (SIMO) Converter
- Soft-Start and Pre-charge Circuit Design
- Synchronous Boost for Bidirectional Battery
- Synchronous Buck with Integrated FET
- Synchronous Converter Shoot-Through Protection
- Synchronous Rectification Design and Control
- Vehicle-to-Grid (V2G) Bidirectional DCDC
- Wireless Power Transfer Coil Design
Middle Engineer· 80
- AC Input Voltage Sensing and Feed-Forward
- AI-Based Motor Drive Fault Diagnostics
- ANPC Three-Phase Rectifier
- Active Rectification for Regenerative Drive
- Back-EMF Observer for PMSM Sensorless Control
- Boost PFC: CCM Operation and Duty Cycle
- Bridgeless PFC Input Current Sensing
- Capacitor Filter Design for Rectifier
- Cascaded H-Bridge (CHB) Multi-Level Inverter
- Common-Mode Voltage in Three-Phase Inverter
- DC Bus Voltage Ripple and Capacitor Selection
- DC Fast Charger (CHAdeMO, CCS) Architecture
- Dead-Time Effect on Output and Compensation
- Digital PFC Controller (UCC28780, NCP1654)
- Diode Bridge Rectifier: Average and RMS Calc
- Direct Torque Control (DTC) for Induction Motor
- EMI Mitigation in Inverter Output
- EV Charging Inlet: IEC 62196, SAE J1772
- Electric Aircraft Propulsion Inverter
- Electrolytic-Less PFC with Film Capacitors
- Encoder: Incremental (ABZ), Absolute (SSI, BiSS)
- FOC Current Control PI Tuning (Bode)
- Field-Oriented Control (FOC): Clark + Park
- Flux Observer for Sensorless Motor (MRAS)
- Flux Weakening for High-Speed PMSM
- Flying Capacitor Multi-Level Inverter
- Four-Quadrant Drive Operation
- GaN Totem-Pole PFC at 1 MHz Switching
- GaN-Based Three-Phase Inverter at 1 MHz
- Grid Forming vs. Grid Following Inverter
- Grid Impedance Estimation for AFE Stability
- Grid Synchronization: PLL, SRF-PLL, DSOGI-PLL
- Hall Sensor and Sensorless BLDC Control
- IEC 61000-3-2 Harmonic Class A/B/C/D
- Inrush Current Limiter: NTC Thermistor, Relay
- Interleaved PFC for Reduced Input Ripple
- Isolated PFC Flyback for Auxiliary Supply
- LCL Filter Design for Grid-Connected AFE
- LLC + PFC Two-Stage Architecture
- Linear Motor and Voice Coil Actuator Driver
- Matrix Converter Topology
- Maximum Torque per Ampere (MTPA) Control
- Megawatt Charging System (MCS) for Heavy EV
- Modular Multilevel Converter (MMC) for HVDC
- Multi-Axis Servo Coordinated Motion
- Neutral-Point Clamped (NPC) Three-Level Inverter
- Offshore Wind Turbine Converter Architecture
- On-Board Charger (OBC) 6.6kW / 11kW Design
- PFC CCM vs. DCM Trade-offs for THD
- PFC Current Loop and Voltage Loop Design
- PFC Pre-Regulator for UPS Applications
- PMSM vs. IPMSM vs. SRM Motor Selection
- Power Analyzer Measurement (Hioki PW6001)
- Power Factor: Displacement vs. True PF
- Predictive Current Control (FCS-MPC)
- Reactive Power Compensation with STATCOM
- Regenerative Braking and Energy Recuperation
- Resolver and Resolver-to-Digital Converter (RDC)
- Silicon Carbide (SiC) Traction Inverter for EV
- Single-Phase H-Bridge Inverter: SPWM Modulation
- Single-Stage PFC Combined with LLC
- Six-Step Commutation for BLDC Motor
- Soft-Start for PFC Pre-Charge Stage
- Solid-State Transformer (SST) Architecture
- Space Vector PWM (SVPWM) Generation
- Stepper Motor: Microstepping and Resonance
- T-Type Three-Level Inverter for Solar
- THD Measurement and IEC 61000-3-2 Limits
- Three-Phase Active Front End (AFE) Rectifier
- Three-Phase Two-Level VSI: SVPWM Algorithm
- Thyristor-Based DC Drive (SCR Converter)
- Totem-Pole PFC Zero-Crossing Commutation
- Totem-Pole PFC: Bridgeless GaN Implementation
- Ultra-High-Speed Motor Drive (>100 krpm)
- Universal Power Converter for V2G and G2V
- VIENNA Three-Phase Three-Level Rectifier
- Variable-Speed Drive for HVAC and Pumps
- Wireless Power Transfer Inverter 500kW
- Zero-Crossing Detection Circuit Design
- dV/dt Filter and du/dt Filter Design
Senior Engineer· 40
- AWG Wire Selection: Current Density
- Additive Manufacturing for Heat Exchanger
- Air Gap Calculation for Energy Storage Inductor
- CFD Thermal Simulation (ANSYS Icepak, FloTherm)
- Common-Mode Choke Design for EMI Filter
- Core Loss: Steinmetz Equation and iGSE
- Core Shape Comparison: E, ETD, PQ, Toroid, Planar
- DBC (Direct Bonded Copper) Substrate
- Die Attach Material: Solder, Sintered Silver
- EPC (Equivalent Parallel Capacitance) of Winding
- Ferrite Bead Selection for HF Noise
- GaN Module Packaging: Embedded Die, LGA
- Heat Pipe and Vapor Chamber Technology
- Heatsink Mounting: Thermal Pad, Grease, Phase Change
- Heatsink Selection: Natural and Forced Air
- Immersion Cooling: Single-Phase, Two-Phase
- Inductor Core Materials: Ferrite, Iron Powder, Nanocrystalline
- Inductor DC Bias and Permeability Roll-Off
- LLC Transformer: Integrated Leakage Inductance
- Liquid Cooling: Cold Plate Design
- Litz Wire: Strand Count, Diameter, Frequency
- Manifold Microchannel Cooling for High Density
- PCB Winding: 1oz / 2oz Copper and Via Stitching
- Planar Transformer Design: PCB Winding
- Power Module Packaging: Bond Wire, Baseplate
- Pressure Contact Technology for Power Module
- Proximity Effect in Multi-Layer Windings
- Skin Effect and Skin Depth in Copper Wire
- Space-Grade Thermal Management
- Spray Cooling for High-Power Density
- TIM Selection: Bergquist, Fujipoly, Dowsil
- Thermal Cycling and Fatigue Life of Solder Joints
- Thermal Resistance Model: Rthj, Rthcs, Rthsa
- Thermal Stack Mechanical Stress FEA
- Thermomechanical Stress and CTE Mismatch
- Transformer Equivalent Circuit: Leakage, Magnetizing
- Transformer Volt-Second Balance and Core Reset
- Water-Cooled Cold Plate CFD Optimization
- Winding Techniques: Bobbin, Toroidal, Sectional
- Wire Bond Fatigue Life Estimation
Staff Engineer· 40
- AI/ML for Converter Efficiency Optimization
- Adaptive Control for Variable Load Conditions
- Anti-Windup and Integrator Reset Implementation
- Auto-Tuning PID for Production Test
- Average Current-Mode Control (ACMC) for PFC
- Average Model (State-Space Averaging) for DCDC
- Bumpless Transfer Between Control Modes
- CHIL (Control-Hardware-in-the-Loop) Setup
- Compensation in Z-Domain: Bilinear Transform
- Crossover Frequency and Phase Margin Target
- Current-Mode Control (PCMC) and Ramp Compensation
- Digital Control IC Design (TI C2000, MCU)
- Digital Controller Design with MATLAB Control
- Duty Cycle to Output: Buck, Boost, Flyback
- Feed-Forward Duty Cycle for Input Rejection
- Frequency-Domain EMI Simulation
- Gain Margin and Conditional Stability Analysis
- H-Infinity Robust Control for Power Converter
- HIL (Hardware-in-the-Loop) with dSPACE
- Impedance Analyzer for PDN Measurement
- LTspice Switching Converter Simulation
- Loop Gain Measurement with FRA (Bode 100)
- MATLAB Simulink Power Systems Toolbox
- Model Predictive Control (MPC) for Converters
- Nonlinear Control for Wide-Range Converters
- Observer-Based: Luenberger, Extended Kalman
- PID Tuning: Ziegler-Nichols, IMC, Model-Based
- PLECS Multi-Domain Power Electronics Sim
- PSIM: Converter and Motor Drive Simulation
- Python Control Library and scipy.signal Bode
- Real-Time Simulation with FPGA (NI, OPAL-RT)
- Reinforcement Learning for Adaptive Power
- Ripple Injection Current-Mode Control
- SIL (Software-in-the-Loop) with Simulink
- Sliding Mode Control (SMC) for Robustness
- Small-Signal Control-to-Output Transfer Function
- Stability Degradation with Parameter Variation
- System Identification for Power Converter
- Type I, II, III Compensator Design on Bode Plot
- Voltage-Mode Control (VMC) with Type III Compensator
Distinguished Engineer· 40
- ANSI/UL 508C: Power Conversion Equipment
- Altitude Test: IEC 60068-2-13
- Automotive-Grade AEC-Q101 for Discrete Devices
- DO-160 Lightning Indirect Effects Section 22
- DO-160: Aircraft Electrical Power (Section 16)
- EN 55032 / CISPR 32 Radiated Emissions Class B
- HALT (Highly Accelerated Life Testing)
- HASS (Highly Accelerated Stress Screening)
- Humidity and Condensation: IEC 60068-2-78
- IEC 60076: Power Transformer Safety
- IEC 61000-3-2: Harmonic Current Limits
- IEC 61000-4-16 Conducted Low-Freq Immunity
- IEC 61000-4-2: ESD Immunity Level 4
- IEC 61000-4-4: EFT/Burst Immunity Level 4
- IEC 61000-4-5: Surge Immunity Level 4
- IEC 61000-4-8: Power Frequency Magnetic Field
- IEC 61851: EV Conductive Charging System
- IEC 62040-3: UPS Performance Standard
- IEC 62109-1 / 62109-2: Grid-Connected PV Safety
- IEC 62196: EV Plug, Socket, Connector Standard
- IEC 62443: Cybersecurity for Industrial OT
- IEC 62477-1: Safety of Power Electronic Systems
- IEC 62660: Lithium-Ion Cell for EV Safety
- IEC 63000: RoHS Technical Documentation
- IEEE 1547: DER Grid Interconnection Standard
- IEEE 519 Compliance Testing at PCC
- IEEE 519: Harmonic Distortion Limits at PCC
- IEEE PELS Standards Committee Participation
- ISO 17409 Vehicle-Side EV Charging Safety
- ISO 17409: EV Conductive Power Transfer
- ISO 6469: EV High-Voltage Safety Parts 1-3
- MIL-STD-461: EMC Requirements for Military
- MIL-STD-704: Aircraft Electrical Power Chars
- NFPA 70E: Arc Flash Hazard Analysis
- Offshore Wind HVDC Interconnector Qualification
- Power Cycling Test: Delta TJ Standard
- Reliability: MIL-HDBK-217F, IEC TR 62380
- Salt Fog Corrosion: IEC 60068-2-11
- Thermal Shock: IEC 60068-2-14 Test Method
- UN 38.3: Battery Pack Transport Testing