China Neodymium And Ferrite Magnets Manufacturer & Supplier 
Dual-channel (primary and secondary code) magnetic rings are multi-pole magnetic ring structures specifically designed for high-precision position and velocity detection. Typically used in conjunction with magnetic sensor chips and magnetic encoder chips, they achieve high-resolution detection of rotational displacement through A/B dual-channel signal output. So, what products commonly utilize them?
The first type is the rotary absolute encoder. The dual-channel magnetic ring serves as the key sensing component in this encoder. Through dual-track or dual-phase output methods, it simultaneously provides absolute position signals and incremental signals. This enables the encoder to instantly determine its position upon startup while also achieving high-resolution speed detection during operation. Such encoders are widely used in industrial automation equipment, robotic joint angle detection, CNC machine tool spindle and servo axis control, and medical device rotary positioning systems.
The image is Robot Industry Single-sided Magnet Ring 44.5x25x1.4mm 630 Gauss
Type 2: Motor Feedback Encoder. In brushless DC motors (BLDC) and permanent magnet synchronous motors (PMSM), dual-channel magnetic rings are commonly used in motor feedback systems. When paired with magnetic encoder ICs, these rings precisely detect rotor position and speed, enabling the driver to implement field-oriented control (FOC) or closed-loop control. This enhances motor smoothness and response speed. Typical applications include servo motor feedback systems, drone motor control, speed detection in power tools, smart home appliance fans, and speed feedback for pump motors.
The third type is the multi-axis measurement system. Within a multi-axis synchronous control system, dual-code-channel magnetic rings enable real-time angular measurement across multiple rotating axes. Their signal linearity, flexible installation, and resistance to dust and oil contamination make them particularly suitable for high-precision, multi-degree-of-freedom mechanical platforms. Typical equipment includes multi-axis robots and collaborative robotic arms, automated inspection turntables, optical or laser scanning systems, precision goniometers, and rotary positioning stages.
Dual-code channel magnetic rings, as critical components in magnetic encoder systems, have played a vital role in various applications such as rotary absolute encoders, motor feedback encoders, and multi-axis measurement systems due to their precision, stability, and durability. Should you require samples, please contact our customer service team. We offer multiple specifications and various pole configurations.
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