Recently, Yongming, a leading company in the capacitor industry, launched its LKE series of low-ESR aluminum electrolytic capacitors, successfully solving the high-frequency ripple and heat loss problems of electric forklifts under complex operating conditions. Verified by a listed electric forklift manufacturer, the product effectively avoids machine jamming, restarts, and MOSFET burnout. Its technical indicators and reliability performance have reached industry-leading levels, providing important support for the localization of core components in electric construction machinery.

Industry Pain Points Highlighted: Ordinary Capacitors Difficult to Adapt to Complex Operating Conditions

With the rapid development of logistics warehousing and intelligent manufacturing industries, electric forklifts have been widely used due to their environmental friendliness and high efficiency. However, reliability issues under complex operating conditions have always plagued the industry. According to the technical head of the aforementioned listed manufacturer, their products frequently experienced power supply system instability in scenarios with frequent start-stop cycles and sudden load changes, sometimes leading to MOSFET burnout and a high overall failure rate.

Technical investigation revealed that the root cause of the problem lies in the insufficient performance of the core component, the aluminum electrolytic capacitor. Electric forklift motors generate significant high-frequency ripple current and transient surges during frequent speed changes and steering. Ordinary aluminum electrolytic capacitors, due to their high equivalent series resistance (ESR), suffer severe heat loss under high-current conditions. The rapid temperature rise of the core leads to electrolyte dehydration, causing rapid capacity decay and an inability to buffer energy, ultimately resulting in supply voltage fluctuations. This failure mechanism has become a common bottleneck restricting the reliability improvement of electric forklifts.

Four Core Technological Breakthroughs Build a Performance Advantage Barrier

Addressing industry pain points, Yongming's R&D team has spent years developing the LKE series 105°C 10,000-hour liquid aluminum electrolytic capacitor, achieving a performance leap through four key technologies. This product uses a high-conductivity electrolyte and advanced etching process, reducing high-frequency impedance by more than 30%, controlling heat loss at its source; it also improves ripple current withstand capability by 30%-50%, easily adapting to extreme operating conditions of motor drive boards.

Meanwhile, the low internal resistance design and optimized electrode structure give the product a microsecond-level charge and discharge response speed, enabling rapid stabilization of the bus voltage and avoiding system failures caused by instantaneous power fluctuations. Its design life of 10,000 hours at 105°C has been verified through accelerated aging tests to be synchronized with the overall system lifespan, significantly reducing later maintenance costs. Yongming's Technical Director stated, "The development of the LKE series has always focused on operational requirements, and each technical indicator has undergone thousands of real-world tests."

Real-world test data confirms reliability; broad industry application prospects

Rigorous comparative test data shows that the LKE series capacitors excel in core indicators: the casing temperature rise is reduced by more than 20°C compared to ordinary products, significantly improving thermal stability; bus ripple voltage is reduced by 40%, greatly enhancing system noise suppression capabilities; and after 10,000 hours of full-load cycle testing, not a single unit failed, achieving internationally advanced reliability levels.

Currently, this product has been successfully applied to electric forklift motor drive boards and is also compatible with high-frequency, high-ripple applications such as electric engineering vehicle controllers. The 63V 470μF and 100V 470μF models, due to their strong compatibility, have become the preferred choice for many leading manufacturers.

Supporting the Upgrading of "Made in China" and Breaking International Technological Barriers

As a national brand in the capacitor field, Yongming has always adhered to its development mission of "For capacitor applications, turn to Yongming if you have difficulties." The successful mass production of the LKE series not only fills the gap in the application of high-performance aluminum electrolytic capacitors in the electric engineering machinery field in China, but also breaks the technological monopoly of international brands in this niche market.

Industry experts point out that the technological breakthrough of Yongming's LKE series provides a new path for the localization of core components in equipment manufacturing industries such as electric forklifts and engineering vehicles, and will further promote "Made in China" to move towards the high end of the global value chain. In the future, with the continued growth in demand for new energy equipment, the market application prospects for high-performance capacitors will be even broader.
ARTICLE FROM :https://www.ymin.cn/news/how-lke-low-esr-aluminum-electrolytic-capacitors-solve-the-high-frequency-ripple-and-heat-loss-problems-in-electric-forklifts/