Hongyi Engineering Team
Application Engineering · Hongyi Electronics
The Hongyi Engineering Team is the application-engineering group at Yiyang Hongyi Electronics — a national high-tech resistor manufacturer in Hunan, China, ISO 9001 + IATF 16949 certified. Collectively the team has over 10 years of in-field experience designing aluminum-housed, wirewound, cement and high-voltage resistors for industrial VFDs, energy-storage PCS, EV-charging traction inverters, elevator regenerative drives and rail-traction braking systems. Articles authored by this team are reviewed against IEC 60322 / IEC 60115 / AEC-Q200 / EN 50155 before publication.
Occupation
Senior Application Engineer — Power Resistors
Specifies, derates, qualifies and audits power-resistor designs for B2B OEM customers in industrial drives, EV charging, energy storage and rail traction.
Experience
10+ years in resistor application engineering
Education
Areas of expertise
- Resistor design and manufacturing
- Aluminum-housed power resistors
- Wirewound resistor winding (inductive and non-inductive)
- Cement resistor encapsulation
- High-voltage resistor insulation design
- Braking resistor sizing for VFD and servo drives
- Pre-charge resistor sizing for EV traction inverters and BESS
- Snubber network design for IGBT half-bridges and SMPS
- Load bank sizing for generator and UPS testing
- IEC 60322 fixed wirewound power resistor compliance
- IEC 60115 fixed low-power non-wirewound resistor compliance
- AEC-Q200 automotive resistor qualification
- EN 50155 railway electronic equipment standards
- RoHS / REACH materials compliance
- Resistor thermal modeling and derating
- Resistor failure mode and effects analysis (FMEA)
Articles by Hongyi Engineering Team
Selection guideHigh power11 min readHow to Choose a High-Power Braking Resistor — A 2026 Engineer's Guide
Five common sizing mistakes, the formulas you actually need (with worked example), and how to read derating curves correctly.
ComparisonSelection guide9 min readAluminum Housed vs Cement vs Wirewound Resistors — Complete Comparison
Which family fits your application? A 12-parameter table, decision flowchart, and three real-world case studies.
ReliabilityFailure analysis13 min readResistor Failure Modes and Reliability — An Engineer's Guide
Five failure modes, the physics behind each, how to detect them in test, and design rules that yield 100k-hour MTBF in real industrial environments.
Selection guideEV12 min readPre-charge Resistor Design for EV Battery & Energy Storage Systems
Why a 5W cement resistor can absorb 100J pulses, how to size for 800V SiC inverters, and the four failure modes that kill pre-charge resistors in the field.
Selection guideSnubber13 min readSnubber Resistor Selection Guide for SMPS, IGBT Drives & Power Electronics
Why standard wirewound resistors INCREASE ringing, the seven-step RC design with a 1200 V / 100 A IGBT example, and the five mistakes that kill snubbers in the field.
Selection guideLoad bank12 min readLoad Bank Sizing Guide — Generator, UPS & Battery Testing in 2026
How to size a load bank for a 500 kW genset, a 200 kVA UPS, and an exit-sign battery string — with NFPA 110 step-loading profiles and a commissioning checklist.