Multi-Pole Magnetic Rings used for Magnetic Encoders

Multi-pole magnetic rings are widely used in magnetic encoders, especially in the field of precision position and speed detection. Customized designed magnetic rings combined with Hall or Magnetoresistance effect chips can achieve a simplified structure and high-precision position detection.

Below is a detailed introduction to our multi-pole magnetic ring products.

Features of Multi-Pole Magnetic Rings

High Resolution: Multi-pole magnetic rings, through their multi-pole design, can achieve high-resolution signal output within a small rotation angle, thereby enhancing encoder precision.
Durability: Made from advanced magnetic materials, these rings feature high resistance to magnetic attenuation, ensuring long-term stable operation in harsh environments.
Variety of Sizes: Available in a range of sizes and pole-pair numbers to meet the needs of different encoder models.
Easy Installation: The compact structure of the magnetic rings allows for easy installation in various mechanical systems, with strong adaptability.

Application Scenarios

Automotive: Muti-pole encoder rings are used for different appilications in automotive, such as ABS system, engine speed detaction, transmission speed detaction.
Industrial Automation: In CNC machines, robotics, and automated production lines, encoders paired with multi-pole magnetic rings enable precise angle measurement and position control.
Elevator Control: In elevator systems, the combination of encoders and multi-pole magnetic rings provides precise position control, ensuring safe operation.
Packaging Machinery: In packaging machines, multi-pole magnetic rings help achieve high-speed, precise packaging operations, increasing production efficiency.

Product Specifications

Parameter	Details
Outer Diameter	30 mm – 150 mm
Inner Diameter	10 mm – 100 mm
Thickness	2 mm – 10 mm
Pole Pairs	16 – 64
Operating Temperature	-40°C to 125°C
Magnetic Induction	300 mT – 600 mT
Material	Ferrite+NBR rubber
Accuracy	±0.1°

Technical Requirements of iC-Haus Encoder Chips for Rubber Magnetic Rings

iC-Haus encoder chips are widely recognized for their high precision and reliability in various industrial applications. When integrated with rubber magnetic rings, these encoder chips require specific technical standards to ensure optimal performance. Below is an overview of the key technical requirements that iC-Haus encoder chips have for rubber magnetic rings：

1. Magnetic Pole Accuracy

Pole Precision:
- Required Tolerance: ±1% of the pole pitch.
- Example: For a pole pitch of 2 mm, the allowable deviation in pole position should be within ±0.02 mm.
Pole Uniformity:
- Required Deviation: ≤ ±5% in magnetic flux density across the ring.
- Example: If the average magnetic flux density is 50 mT, the variation should not exceed ±2.5 mT.

2. Magnetic Induction Level

Induction Strength:
- Required Range: 40 mT to 120 mT.
- Example: The ring should maintain a magnetic induction level within this range at the sensing distance specified by the encoder chip (typically 1-2 mm).
Stable Magnetic Properties:
- Temperature Coefficient: ≤ ±0.1% per °C.
- Example: If the magnetic induction is 80 mT at 20°C, it should not vary by more than ±0.08 mT per degree Celsius change.

We can provide customized product design to meet customers’ unique design needs.

We,OBT, have developed standard size of magnetic rings for encoder appilicaiton:

There are single track magnetic encoder rings for incremental encoders and 2 Track nonius encoder disc for absolute position encoders.

As a core component of industrial encoders, multi-pole magnetic rings are highly valued for their precision and reliability across various industrial applications. If you are interested in our multi-pole magnetic ring products, please contact us for more information and quotation.

Magnetic Ring Reference reading: