Problem Scenario and Pain Point Description
In high-intensity, long-duration electric forklift applications, the machine is prone to problems such as jamming, restarting, and even motor drive MOSFET burnout during frequent starts and stops, steering, and sudden load changes. The customer originally used ordinary aluminum electrolytic capacitors, which overheated severely and degraded rapidly under high-frequency, high-ripple current surges, resulting in the power system’s inability to provide stable energy buffering for the motor drive, seriously affecting the equipment’s continuous operation capability and reliability.
Root Cause Technical Analysis
The root cause of the problem lies in the high-frequency ripple current and transient current surges generated by frequent motor speed changes and steering. Ordinary aluminum electrolytic capacitors have excessively high equivalent series resistance (ESR), leading to significant heat loss (P=I²R) when large currents pass through, causing the capacitor core to overheat, the electrolyte to dry out, a sharp decrease in capacitance, and premature end of life. Failed capacitors cannot provide or absorb instantaneous energy during sudden load changes, causing voltage drops or overshoots, which in turn trigger MCU resets or power device overvoltage breakdowns.
Yung-Ming Solutions and Process Advantages
Yung-Ming introduces the LKE series 105°C 10,000-hour long-life liquid aluminum electrolytic capacitors, specifically addressing the above-mentioned problems:
Ultra-low ESR Design: Utilizing a new electrolyte and optimized process, it significantly reduces impedance and heat loss at high frequencies, controlling temperature rise at its source and improving reliability.
High Ripple Current Withstand Capability: Withstands ripple current 30%-50% more than ordinary products, easily handling high-frequency ripple current generated by motor drives.
Excellent Transient Response: Possesses rapid charge and discharge characteristics, providing instantaneous large current to the motor and effectively buffering voltage fluctuations.
Long-Lifespan Matching: Guaranteed 10,000-hour lifespan at 105°C, highly matching the overall machine design lifespan, significantly reducing on-site failure rates.
Data Verification and Reliability Description
After replacing the capacitors with Yung-Ming LKE series capacitors, the electric forklift operated smoothly under harsh conditions, with no further restarts or drive damage issues. Actual test data verification:
Temperature rise test: The capacitor casing temperature rise was reduced by more than 20°C compared to the old solution, significantly improving lifespan and reliability.
Ripple voltage test: The ripple voltage of the motor power supply bus was reduced by approximately 40%, resulting in more stable system operation.
Durability test: Passed 10,000 hours of full-load cyclic stress testing with no failures recorded.
Application Scenarios and Recommended Models
Suitable for power filtering and energy buffering circuits in motor controllers of electric forklifts, electric engineering vehicles, etc. Recommended models: LKE series (e.g., 63V 470μF, 100V 470μF), specifically designed for high-frequency, high-ripple applications.
Conclusion
YMIN consistently adheres to the market positioning of “For capacitor applications, turn to YMIN for solutions,” committed to replacing international competitors with high-performance capacitors and becoming a leading global brand. The LKE series is not only a technological breakthrough but also a fulfillment of its promise to customers—injecting a stable and reliable “heart” into every electric forklift.
Post time: Oct-31-2025