The soft start feature of a motor can be realized by using a permanent magnet compound magnetic coupling.

It is perfect for industries with prime movers with power greater than 800kW such as electric power, steel, mining, coal and chemical industries as well as for fans, pumps and other power equipment that are prone to stall.
This type of coupling transmits more torque with the same volume than other types of couplings.
The soft-start feature of this type of coupling can also be realized with an overload protection function, flexible connection, smooth transmission and effectively eliminating system vibration.
It has low centering requirements and easy installation and debugging.
The structure is simple so no motor foundation changes are required when transforming existing systems.
Maintenance-free, long service life;