Naxinwei: Withdraws from the MT6901—Dual‑Code‑Track Vernier‑Algorithm Inductive Encoder Chip
Recently, Novosense announced the launch of Dual-code-track cursor algorithm inductive encoder chip MT6901 , further enhancing its product portfolio in the field of high-precision motor position sensing. Previously, the company had already established a product lineup of magnetic encoders spanning Hall‑effect and AMR (anisotropic magnetoresistive) technologies; with the launch of the MT6901, A technical architecture has been established featuring both magnetic encoders and inductive encoders operating in parallel. It can meet diverse requirements, ranging from general-purpose control to high-precision motion control. For servo motors, stepper motors, and robot joints Provides location feedback solutions for various application scenarios.
Inductive Position-Sensing Solution for Motion Control
The encoder is a core component for position feedback in industrial motors, and its accuracy and stability directly impact the control performance of the equipment. The MT6901 leverages eddy‑current sensing principles and incorporates the advantages of a dual‑track vernier algorithm, enhancing environmental robustness while maintaining high angular measurement accuracy. The chip generates a high‑frequency electromagnetic field via an excitation coil and acquires a signal modulated by the rotor through a receiving coil, enabling precise position estimation. This sensing scheme is insensitive to strong magnetic interference, electromagnetic noise, and contaminants, ensuring stable and reliable signal output even in harsh industrial environments characterized by dust, oil contamination, or significant vibration.
Meanwhile, the MT6901 boasts excellent temperature‑drift characteristics, maintaining high‑accuracy output even under varying temperature conditions, with overall reliability markedly superior to conventional solutions. In addition, the chip supports both motor‑rotation detection and linear‑motion control, offering greater design flexibility for a wide range of industrial equipment and robotic systems.
The dual‑code track cursor algorithm and self‑calibration mechanism enhance angular accuracy.
The MT6901, leveraging a dual‑code‑channel signal processing architecture, incorporates an auto‑calibration mechanism; after system calibration is completed, the chip’s integral nonlinearity ( INL ) The typical value can reach ±0.02°; this level of accuracy meets the requirements of certain high-end motion-control applications. While ensuring angular‑measurement precision, it also addresses the reliability challenges faced by optical encoders in complex industrial environments—namely, their susceptibility to interference—thereby satisfying the stringent demands of scenarios such as robotic joints that require both rapid dynamic response and high trajectory accuracy.
Supports off-axis structures, compatible with complex mechanical designs.
The MT6901 supports off-axis mounting, which, compared with conventional axial mounting, simplifies the mechanical structure and enables innovative designs for certain specialized applications.
In robotic joint applications, hollow‑wire routing is commonly employed to accommodate wiring and cables within the joint. Inductive sensing solutions exhibit lower susceptibility to wire‑current interference and superior immunity to electromagnetic disturbances; when combined with an off‑axis inductive sensing approach, they better accommodate such structural designs, simplify assembly, and enhance system reliability.
Multi-interface output, compatible with mainstream control systems.
To meet the diverse requirements of motor control systems, the MT6901 is equipped with a wide range of interface output options, including: ABZ , UVW, PWM, and digital communication interfaces:
ABZ: 1–16384 PPR programmable
UVW: Supports 1–16 pole pair configurations
PWM: 12-bit resolution
SPI: 21-bit output
UART: 23-bit, up to 4.0 Mbps
(Source: Naxinwei Official Website)
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