Centrifugal separator electrically driven by magnetisable regions integrated into the rotary vessel interacting with electromagnetic windings in the housing

A centrifugal separator comprising:

• a housing;
• and
• a rotary vessel having an axis of rotation, the rotary vessel contained within the housing and rotatably attached to the housing for rotation relative to the housing about the axis, the rotary vessel receiving liquids from which contaminants are to be removed, denser contaminants or particles are separated from the liquid centrifugally in the rotary vessel and retained within the rotary vessel as a cake adhering to an interior surface of the rotary vessel,
• wherein
• the rotary vessel has a plurality of magnetisable regions circumferentially spaced apart on an exterior surface of the rotary vessel and the housing has one or more electromagnetic windings,
• and
• in that the one or more electromagnetic windings are selectively energisable to create a magnetic field to cause rotation of the rotary vessel,
• wherein each of the plurality of magnetisable regions are integral fixed to the exterior surface of the rotary vessel.