Principle of Operation

Electromagnetic Powder Clutch System:

When metal powder is brought near a magnet, the metal particles are linked in chain fashion and a transmission torque is generated. The electromagnetic powder clutch uses this principle.

Electromagnetic Powder Clutch Operation:

A small gap is provided between the inside edge of the drive member and the outside edge of the driven member of the clutch. This gap is filled with a magnetic powder and magnetic force is applied to this powder and the drive member and driven member are coupled together.

A coil provided at the driven member acts as the magnet. When current is passed through this coil, the coil becomes an electromagnet and generates a magnetic force.

The magnetic powder linked in a chain fashion by this magnetic force transmits the power from the drive member to the driven member. Transmission torque is proportional to the strength of the current. When current flow is cut off, transmission torque disappears.