Frameless Torque Motor Working Principle

A frameless torque motor is a type of permanent magnet synchronous motor. Its working principle is based on the law of electromagnetic induction and Lorentz force, directly outputting torque through the interaction of magnetic fields between the stator and rotor.

 

Core Working Principle
Electromagnetic Torque Generation: When the stator windings are energized, they generate a rotating magnetic field, which interacts with the rotor permanent magnet field to produce electromagnetic torque for rotation.
Energy Conversion Mechanism: When current passes through the conductor in a magnetic field, it experiences Lorentz force, driving the rotor to rotate and converting electrical energy into mechanical energy.

 

Structural Composition Features
Frameless Design: Only includes the stator and rotor components, removing the traditional motor housing, bearings, and shaft, and needs to be directly embedded into mechanical equipment.
Flat High Torque: Has a large diameter-to-length ratio and more magnetic poles, ensuring high torque output at low speed, exhibiting a flat profile.

 

Control System and Operation
Closed-Loop Control: Requires cooperation with a drive amplifier and feedback devices (such as encoders) for real-time fine-tuning of rotor position and speed.
Direct Drive: The motor shaft is directly connected to the load, without the need for a gearbox or belt, reducing transmission loss and improving response speed.