Shanghai Yongming Electronic Co., Ltd.

Overview

Modern humanoid-robot servo controllers demand rapid power bursts, ultra-low voltage ripple, minimal size, and high durability. Traditional capacitors (especially electrolytics) struggle to meet this in compact, high-frequency environments.

Challenges

• Humanoid robots incorporate dozens of servos across joints, requiring fast transient currents and tight power stability.
• Controllers operate at high PWM frequencies; low ESR and stable voltage are critical to ensure precision and avoid motion jitter.
• Space inside joints or limbs is extremely limited—components must be small, thermally robust, and long-lived.

YMIN’s Solution

YMIN introduces laminated polymer solid aluminum electrolytic capacitors and polymer tantalum capacitors designed for robotic servo power modules:

• Low ESR (down to ~40 mΩ), high-frequency performance
• Operating voltages up to ~100 V
• Compact volume with capacitance like ~27 μF packed efficiently
• Thermal stability up to 105 °C
• Fast charge/discharge—ideal for rapid load changes during joint motion
• These capacitors filter noise, stabilize voltage rails, and supply instantaneous energy during dynamic actuation, boosting response speed, control accuracy, and system reliability.

FAQ

Q: Why not use standard electrolytic or ceramic capacitors?

• Traditional electrolytics have higher ESR, shorter lifespans, and bulky form factors unsuited to space-constrained robotics.
• MLCC ceramics often lack sufficient capacitance in small sizes. YMIN’s polymer types strike the needed balance of low ESR, high capacitance, compactness, and longevity.

Q: How do these capacitors improve control performance?

By minimizing voltage dips and ripple during rapid current draws (e.g. motor startup, torque changes), they ensure cleaner power delivery. This directly improves servo loop stability, motor precision, and reduces thermal stress.

Q: Are they suitable for harsh environments and small joints?

Yes. High-temperature tolerance (to ~105 °C), long life, and compact size make them ideal for embedded use inside humanoid-joint housings, where space and heat are both limited.

Q: Typical specs?

• ESR: as low as ~40 mΩ
• Voltage rating: up to ~100 V
• Capacitance: tens of μF in small packages (e.g. ~27 μF)
• Operational temperature: up to ~105 °C

Why This Matters in Humanoid-Robot Controllers

Humanoid robots often use high-bandwidth, high-PWM control loops (e.g. > 50 kHz) enabled by GaN or integrated motor-drive ICs. These setups demand front-end capacitors that can respond instantly and remain stable across thousands of duty cycles. YMIN’s advanced polymer capacitors tick those boxes, helping push servo density, precision, efficiency, and durability to the next level.

Quellenlink: https://www.ymin.cn/news/breaking-through-the-performance-bottleneck-of-humanoid-robot-controllers-efficient-and-stable-capacitor-solutions/

Autor: Shanghai Yongming Electronic Co., Ltd. （https://www.ymin.cn/)

Kontakt: ymin-sale@ymin.com