COY Delayed Permanent Magnet Eddy Current Transmission

At the initial position, the air-gap is 3mm between copper rotor and permanent magnet rotor. When the
Motor rotates, the copper ring of copper rotor cut the magnetic field lines of permanent magnet, generate
Inductive eddy current and creates a magnetic field in copper rotor. Between the two fields, there is force
Which is not only transfer torque between the motor and work machine, but also transfer the axial force
Between sub-rotors. Compared with the speed slip between copper rotor and permanent magnet rotor,
The air-gap is from 3mm to 5mm for achieving better soft-start.
The work machine torque cyclical changing, the air-gap can vary between 3mm to 5mm. So that, the
Transmitted torque achieve periodic changement.
When the work machine suddenly overloaded or stuck in the case, the speed of permanent magnet
Rotor decreased rapidly, or reduce to zero immediately. But, the speed of the motor and the copper rotor
Almost the same, due to the axial force between sub-rotors enlarge the air-gap (maximum 5mm).
Thereby reducing transmitted torque between the work machine and the motor, the motor run at
Relatively lower torque for protecting itself. Even shutting down the the motor, the motor cannot be
Damaged at all.

Few day-maintenance, low operation cost, almost maintenance-free products
Accept misalignment, centration error 5mm (max), angular error 2 (max) 。
With overload protection, increase overall system reliability, eliminate the amazement of system for
Overload
Improve the motor starting capability and come true the motor soft start / stop. And, reduce shock and
Vibration, coordinate between multi-machine-driven load distributions.
Simple structure, small size, easy to install, adapt to work in harsh conditions.
Extend the life of the transmission system components.
Simple structure, small size, easy to install