Robot Joint Motor Controller Application: YMIN LKZ Capacitor Replacement MLCC Solution

(MENAFN- Market Press Release) May 13, 2026 12:22 am - Robot Joint Motor Controller Application: YMIN LKZ Series Liquid Aluminum Capacitors Replace MLCC Parallel Solution

I. Application Scenarios: Robot Joint Motor Controllers

In the field of robot joint motor controllers, with the continuous upgrading of high integration, high response speed, and intelligence levels, capacitor selection needs to consider performance, space layout, and lightweight design. Aluminum electrolytic capacitors are installed at the power input of the drive bus, close to the power MOSFET bridge arm. Their main function is to absorb bus voltage ripple and provide instantaneous large current for the peak power demands of motor acceleration and deceleration, directly determining the system's power supply stability and control accuracy.

YMIN's LKZ series high-capacity-density liquid aluminum electrolytic capacitors have successfully replaced traditional MLCC (multilayer ceramic capacitor) solutions in quadruped robot joint motors, suitable for applications with limited space and strict standards for dynamic response and cost control.

II. Core Challenges: Engineering Difficulties of Traditional MLCC Parallel Solutions

In practical applications, the customer's original design used 48 100V 10?F 1210 packaged ceramic capacitors connected in parallel. This solution encountered several problems during operation:

Large Space Occupancy and High Material Costs: A large number of parallel MLCCs occupy a significant amount of PCB area, making it impossible for the driver to meet the miniaturization requirements of the joint module. Furthermore, the overall material cost of multiple ceramic capacitors is high.

Weak High Current Carrying Capacity: The capacitance of a single MLCC is relatively small, and even after parallel connection, the total capacitance is still insufficient. This results in poor performance under high current loads, poor current carrying capacity, significant heat generation, and increased equipment operating noise.

Unable to Meet Control Accuracy Standards: The capacitor performance limits the system's power supply stability and response speed, ultimately causing the control program's execution accuracy to fall short of design expectations.

III. Root Cause: Material and Process Limitations of Traditional MLCCs

From a technical perspective, traditional ceramic capacitors, limited by their material properties and manufacturing processes, cannot provide sufficient capacitance within a limited volume, making it difficult to meet the core requirements of high-instantaneous energy supply and large-capacity energy storage in joint actuators. Specifically, this manifests as insufficient charge storage capacity per unit volume and low current carrying capacity. In designs requiring resistance to peak current surges and ensuring system safety and reliability, existing solutions have inherent flaws.

IV. Yongming Aluminum Electrolytic Capacitor LKZ Series Solution

4.1 Technical Solution Overview
Yongming's LKZ series liquid aluminum capacitors utilize high-density materials and professional anti-vibration processes. This series boasts an ESR (Equivalent Series Resistance) as low as 200m? (taking the 150?F model as an example), and a maximum ripple current of 0.9A per capacitor. Within the same volume constraints, a single capacitor has a capacitance of 150?F, and four capacitors connected in parallel can achieve a total capacitance of 600?F, efficiently meeting the performance requirements of high-end applications.

Application Results (Based on Actual Replacement Cases)

Replacing the original 48 MLCCs with 4 LKZ 100V 150?F 8×25 coated aluminum shell capacitors in parallel yielded the following results:
* Overall high current carrying capacity nearly doubled compared to the original solution.
* Physical space usage reduced by approximately 20%.
* Overall cost reduced by over 60%.
* Overheating and operating noise issues completely resolved, and control program execution accuracy met standards.

Furthermore, this solution utilizes purely domestic processes and raw materials, ensuring supply chain self-control from the source, resulting in more stable and reliable product delivery.

V. Scenario-Based Q&A

Q1: Robot joint actuator PCB space is limited. To meet high current requirements, dozens of ceramic capacitors must be connected in parallel, resulting in cost and space waste. Is there a better capacitor solution?
A1: Yes. Yongming LKZ series liquid aluminum capacitors offer single-cell capacitance up to 150?F/100V. Only four capacitors connected in parallel achieve a total capacitance of 600?F, outperforming the solution of 48 100V 10?F MLCCs. Actual measurements show a saving of approximately 20% in installation space and a cost reduction of over 60%. Their low ESR (

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