Planetary Integrated Joint Module PJM Series

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Product Description

The High-Dynamic Integrated Joint Module is a compact, fully integrated actuation solution that combines a high-torque servo motor, intelligent driver, precision harmonic/planetary reducer, dual encoders, and advanced force-position control algorithms into a single unit. Designed for maximum power density and dynamic responsiveness, it delivers exceptional torque output, rapid acceleration, and smooth, accurate motion control. With plug-and-play simplicity and robust communication interfaces (EtherCAT/CANopen), the module significantly reduces design complexity and development time for robotic systems. Ideal for applications requiring high bandwidth, impact resistance and precise force compliance, this joint module enables legged robots, collaborative arms, humanoids and agile manipulators to achieve human-like agility and operational safety.

Product Specifications

High Bandwidth & Precision Control The module achieves a current loop bandwidth of 6 kHz with a response latency of less than 50 μs, delivering accurate torque output and stable control across the entire speed range—meeting the most demanding dynamic application requirements. Multi-Layer Safety Redundancy & Active Derating A dual-encoder redundant feedback architecture ensures fail-safe operation. Under overload conditions, the module dynamically derates power, actively isolates faults, and performs a safe stop, guaranteeing system integrity and preventing loss of control even in extreme operating scenarios. High-Speed Field Weakening & Advanced Thermal Management Deep field-weakening control enables sustained high torque output even at high speeds. Advanced thermal management techniques maintain a temperature difference of less than 3°C between the stator and housing, preventing frequency derating during continuous high-load operation. Algorithmic Calibration & Consistency Compensation Before leaving the factory, each module undergoes dynamic model identification and algorithmic compensation calibration. This effectively eliminates assembly variations and ensures consistent performance across mass production batches. Compliant Disturbance Rejection & Optimal Control Under All Operating Conditions Built-in compliant control algorithms enhance human-robot safety. With robust disturbance rejection and minimal tuning effort, the module intelligently adapts to diverse working conditions, automatically selecting the optimal control strategy for each scenario. Intelligent Diagnostics & OTA Continuous Evolution Real-time diagnostics are supported via high-speed fieldbus, with fault data latching enabling remote post-event analysis. Over-the-air (OTA) upgrade capability allows the module to continuously unlock improved performance and new features throughout its lifecycle.

Company Profile

Ji Hua Qujie Technology (Foshan) Co., Ltd.

Ji Hua Qujie Technology (Foshan) Co., Ltd. was established in 2025, with its core team originating from the Robotics Engineering Research Division of the Ji Hua Laboratory—one of Guangdong Province’s first batch of provincial-level laboratories. As a major scientific research and innovation platform boasting over a thousand highly qualified postgraduate and doctoral researchers, the Ji Hua Laboratory provides the company with a solid foundation of technical expertise and engineering experience. The company specialises in the field of core robotic motion actuators and is a “hard tech” enterprise dedicated to high-end R&D and mass production. Adhering to the core philosophy that “algorithms define hardware”, and leveraging proprietary, high-performance servo drive and motion control technologies, the company focuses on the R&D of high-dynamic, high-precision, intelligent integrated joint modules. It provides standardised and customised core components as well as complete system solutions for the global robotics industry, We are fully committed to breaking through core technological barriers in the industry and strive to become a benchmark and leading enterprise in the global robotics core components sector.
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