Power Electronics Group

https://mailchi.mp/589ed26ef494/action-required-software-setup-before-workshop-begins

https://mailchi.mp/dfb3486d247e/workshop-videos-and-slides-now-available

Workshop Videos and Slides Now Available I'm excited to share that our comprehensive brushless permanent magnet motor design workshop series is now available at the below links:

⚡ 5-Phase vs 25-Phase Motor Configuration

Also, check out our latest workshop at https://1drv.ms/b/c/0b5cbd27b2cfa06c/EY9RFGC0Pk9InoMAw04-NmkB-hMVrBkejhmlXjoIDeTc0w?e=ysk5Ea

🔍 Motor Specifications

The normalized BackEMF data reveal individual phase slot characteristics for a 5-phase, 25-slot, 22-pole motor configuration.

The waveforms display a 30-degree electrical phase shift between adjacent slots within each phase group.

🎯

Should this motor be operated as a 5-phase system (with five slots per phase) or reconfigured as a 25-phase system (with individual slot control)?

Ignore and implementation.

How does the play a role in all this?

📊 Key Performance Metrics to Evaluate:

🌊 Torque ripple characteristics and smoothness

⚡ Efficiency across the operating range

🎮 Dynamic response and controllability

🛡️ Fault tolerance and reliability

🌡️ Thermal management and hotspot mitigation

🔬

Given the 30-degree electrical spread and normalized BackEMF characteristics shown, which configuration provides superior performance for high-precision applications requiring minimal torque ripple while maintaining robust operational reliability?

🧠 Winding Factor Impact Analysis

The winding factor plays a crucial role in determining:

1. Fundamental EMF amplitude per phase configuration

2. Harmonic content distribution across the spectrum

3. Torque production efficiency for each approach

4. Optimal current allocation strategy

What's your take on this engineering challenge? Which approach would you choose for your application?

Also, check out our latest workshop at https://1drv.ms/b/c/0b5cbd27b2cfa06c/EY9RFGC0Pk9InoMAw04-NmkB-hMVrBkejhmlXjoIDeTc0w?e=ysk5Ea

🔧 Revolutionary Motor Engineering is Here 🔧

The future belongs to engineers who combine human expertise with - without breaking the bank on software licenses.

Join our 3-Day Workshop on (October 29-31, 2025) - (Registration Link -https://powerelectronicsgroup.com/workshop/) and discover how to:

✅ Speed: Analyze 1000 design variants in minutes vs. weeks manually

✅ Discovery: Let AI find optimal designs humans would never consider

✅ Integration: Master seamless workflows from design → simulation → control → manufacturing

✅ Cost: Achieve $50,000+ commercial tool results for $0

What You'll Master:

• FEMM, Python, and TensorFlow for professional motor analysis

• AI-enhanced optimization using genetic algorithms

• Open-source hardware design with STM32 and KiCad

• Digital twin development for real-time monitoring

: Traditional motor engineering education teaches expensive, proprietary workflows. We're democratizing access to world-class capabilities through open-source AI tools that continuously improve.

From BLDC fundamentals to advanced control algorithms - all using free tools that deliver professional results.

Who Should Attend:

Motor engineers,

Power electronics designers,

Embedded systems developers and engineering managers looking to 10X their team's capabilities.

Ready to lead the open-source motor revolution?

Register: https://powerelectronicsgroup.com/workshop/



Power Electronics Group - Democratizing Advanced Motor Engineering Since 2009

🚀 Engineering Excellence from India: Revolutionizing Industrial Ceiling Fans (HVLS Fsn) with Advanced Motor Technology

Proud to spotlight this groundbreaking 24-slot, 28-pole permanent magnet synchronous motor (PMSM) platform explicitly designed for High Volume Low Speed (HVLS) industrial fans by Power Electronics Group (https://powerelectronicsgroup.com/).

This isn't just another motor – it's a testament to Indian manufacturing excellence in the global arena.

What makes this motor platform exceptional:

🔧 Gearless Direct Drive Design – Eliminating mechanical complexity while maximizing efficiency and torque delivery

⚡ High Power Density – Achieving up to 170 N-M torque output with compact footprint for 24ft diameter fans

🔇 Ultra-Quiet Operation –

The Open-Source AI Revolution in Motor Engineering

Innovation thrives when brilliant minds have access to powerful tools without barriers.

This workshop represents a paradigm shift in motor engineering education, combining three decades of industry expertise with the democratizing power of open-source technology and artificial intelligence.

"We believe the future of motor engineering belongs to those who can harness both human wisdom and machine intelligence. This workshop empowers you with cutting-edge AI tools and open-source solutions that cost nothing but deliver everything."

This workshop emerges from 35 years of relentless innovation at Power Electronics Group, where we've witnessed the evolution from expensive proprietary tools to today's revolutionary open-source ecosystem.

We've seen firsthand how artificial intelligence is transforming motor design, how open-source communities are outpacing traditional vendors, and how engineers armed with the right knowledge can achieve extraordinary results without massive software budgets.

From our pioneering work with expert systems and fuzzy logic in the 1990s to today's deep learning breakthroughs, we've lived through every wave of technological advancement.

The mistakes taught us resilience, the breakthroughs fueled our passion, and the open-source movement showed us that the best solutions emerge when knowledge flows freely.

The New Reality: Today's motor engineers can access Python libraries more powerful than million-dollar software packages, program STM32 controllers that outperform expensive industrial systems, and leverage AI algorithms that were once exclusive to tech giants.

This workshop doesn't just teach you motor design – it liberates your potential by removing every technical and financial barrier between you and world-class engineering capabilities.

"In the open-source AI era, your only limitation is your imagination. We're here to expand both."

Find the details here - https://powerelectronicsgroup.com/

Accurate electromagnetic simulation tools are indispensable for motor design and analysis, particularly during early-stage development and optimization.

While commercial finite element (FE) tools are widely adopted in the industry, their high cost and licensing restrictions limit access for startups, academia, and prototyping efforts.

Finite Element Method Magnetics (FEMM) offers a compelling alternative: a free, open-source 2D solver for low-frequency electromagnetic problems.

FEMM’s functionality is well-suited for modeling rotating machines, transformers, actuators, and other magnetic systems.

Its effectiveness is significantly enhanced with MATLAB to automate multi-point simulation, parameter sweeps, and post-processing.

FEMM and MATLAB create a lightweight yet powerful environment for electromagnetic design and analysis.

This article documents a structured approach for using FEMM and MATLAB to design and evaluate a high-torque outer rotor motor. It presents a replicable workflow that includes defining the geometry and materials, solving for magnetic fields, and calculating torque and losses, followed by MATLAB scripting for automated simulation and data extraction.

This method particularly benefits power electronics researchers and motor designers aiming to implement an agile development cycle.

The combined FEMM-MATLAB approach enables deeper insights into field behaviors, material performance, and electromagnetic efficiency by reducing simulation time and providing real-time parameter tuning.

The analysis is extendable to fractional-slot, concentrated winding configurations, and other topologies.

Read More ...

https://powerelectronicsgroup.com/finite-element-motor-design-and-automation-using-femm-and-matlab-a-practical-methodology-for-motor-engineers/

One Rule for Power Electronics PCB Layout That You Can’t Ignore

Whether you're designing a motor drive or a high-voltage inverter, one principle stands above all:

Keep your current loops short and tight.

Like flux loops in motor design, current loops in power electronics must be identified, minimized, and controlled. This is especially critical when you're dealing with 700V+ bus voltages. Why?

Because long current loops =

Higher parasitic inductance
Voltage overshoots
EMI nightmares
Gate drive noise that can crash your microcontroller

What works:
Short gate drive traces
Tight placement of film and electrolytic capacitors near IGBTs/MOSFETs
VBUS planes and low impedance paths
Laminated bus bar designs with grounding directly over power devices
Internal PCB planes for impedance control
Good layout = stable operation, cleaner switching, and rock-solid EMI performance.

Layout isn't just routing—it’s an engineering discipline in physical form.

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https://powerelectronicsgroup.com/minimizing-current-loops-in-high-voltage-inverter-pcb-layouts-why-it-matters/

My favorite analysis of a permanent magnet motor is the d-q analysis as one can easily visualize the entire motor performance using the d-q vector diagram as shown below. Id the demagnetizing vector is aligned with the +ve x-axis and Vd is therefore automatically aligned with the -ve x-axis. The back EMF component is aligned with the Y-axis along with the Iq compnent. Thereafter we can develop the complete motor torque and power equations using this graphic.

🚀 Master 30 years of expertise in just 3 days!
Join our online workshop from April 22–24 and unlock the secrets of motors, inverters, firmware & more.
🧠 Learn from the best. 💻 From anywhere.
📍 Limited spots – Register now!
Register now: https://powerelectronicsgroup.com/workshop