In motor control, new energy vehicle electric drives, servo system selection, or testing, engineers most frequently ask: "What is the accuracy of this resolver?" However, datasheets often list parameters like "Electrical error ≤ ±10′", "Angle accuracy ±15′", "Resolution 16 bits", etc., which can eas

In many motors, sensors, and magnetic transmission devices, we often encounter a key component—the magnetic ring (or magnet ring). It may look like a simple circular ring, but different magnetization directions can lead to completely different performance and application scenarios.The two most commo

In recent years, axial flux motors have gained increasing traction in the electric drive community. They are regarded by many as one of the representative directions for next-generation high-performance motors, especially in applications where volume and weight are critical—such as in-wheel motors,

In high-performance motion control scenarios such as robot joints, collaborative robotic arms, and direct-drive rotary tables, frameless torque motors are becoming increasingly common. They have no housing, no bearings—essentially a "bare rotor + stator" power core that is embedded directly into the

In industrial automation equipment, CNC machine tools, robot joints, servo motors, and similar applications, optical encoders are common angle and position feedback components. However, they have a "delicate" weakness: they are sensitive to dust, oil, vibration, and high temperatures. Once the inter

In fields such as high-speed motors, aviation electric drives, air compressors, and flywheel energy storage, rotor speeds are continuously increasing, and permanent magnets face significant tensile stress risks due to centrifugal forces. To protect the permanent magnets and ensure rotor structural i

In high-performance motion control applications such as servo motors, robot joints, and electric spindles, magnetic encoders are gaining popularity due to their small size, oil resistance, vibration tolerance, and low cost. However, many engineers encounter a thorny issue during high-speed rotation

In applications such as new energy vehicle electric drives and industrial servos, reluctance-type resolvers are widely used as motor rotor position sensors. They contain no semiconductor chips, withstand high temperatures, and resist vibration -they appear very “rugged.” However, many engineers enco

I. The Problem: The Hidden Risk of Robot “Joint” FailureIn industrial robots, collaborative robots, and precision servo systems, magnetic encoders play a critical role as “joint sensors.” They detect changes in the magnetic field of the encoder disk (magnetic ring) and provide real-time feedback on

Introduction: An Indispensable "Eye" for Motor ControlIn the drive motor of new energy vehicles, there is an inconspicuous yet critically important component -the variable reluctance resolver (often shortened to "resolver"). It acts as the motor's "eye," constantly telling the motor controller: "Whe