Commutation encoder with solid shaft or hollow shaft

Product Details

Encoders with Commutation for Electric Motor Control: Enhancing Efficiency and Precision

Encoders with commutation are critical components in electric motors, providing precise control over motor commutation. These incremental encoders are equipped with additional commutation tracks that synchronize the transfer of current between motor windings. Commutation ensures that the current flows in sync with the magnetic field of the rotor, allowing the motor to operate efficiently.

In electric motors, pole pairs create a direct connection between electrical and mechanical revolutions. One electrical revolution always corresponds to one mechanical revolution divided by the number of pole pairs. The resolution of commutation signals is directly tied to the number of pole pairs, ensuring accurate motor performance.

These encoders not only include the standard ABZ tracks of incremental encoders but also output UVW tracks used for commutation in three-phase electric motors. The UVW signals follow the 3-bit Gray code, with the states [000] and [111] excluded. In a three-phase motor with one pole pair, six states are distinguished per mechanical revolution, providing rotor position accuracy within 60°, sufficient for moving the motor with field-oriented control until the next UVW edge. The rotor position is then precisely determined for continued motor control.