Patent ID: 11935715
Assignee: EATON INTELLIGENT POWER LIMITED
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. An electromagnetic drive unit for a switching device, comprising:
a magnetic core with a first, a second, and a third magnetic path each arranged transversely with respect to a longitudinal axis of the electromagnetic drive unit and coupled to longitudinal magnetic struts at respective ends to form a magnetic frame structure;
an armature configured to be movable along the longitudinal axis between a first and a second state; and
a first and a second magnetic coil configured to move the armature based on excitation of the first and/or the second magnetic coil,
wherein the first magnetic coil is arranged between the first and the second magnetic path and the second magnetic coil is arranged between the second and the third magnetic path with respect to the longitudinal axis,
wherein the first magnetic coil is configured to face a contact unit with respect to an assembled configuration of the switching device and to move the armature into the first state based on excitation,
wherein the magnetic paths are configured such that the second magnetic path is arranged between the first and the third magnetic path with respect to the longitudinal axis,
wherein the first magnetic path is configured to face towards the contact unit and the third magnetic path is configured to face away from the contact unit,
wherein the magnetic core and the magnetic coils are configured in coordination with each other such that a magnetic flux that flows through the magnetic paths to move the armature between the first and the second state is adjustable,
wherein the magnetic paths and the first magnetic coil are configured in coordination with each other such that based on excitation of the first magnetic coil the magnetic flux substantially flows through the first and the second magnetic path, and a magnetic force acts in a direction from the second magnetic path to the first magnetic path to move or hold the armature in the first state,
wherein the armature at one end comprises an inclined pole surface with respect to the longitudinal axis which is configured to interact with an inclined magnetic surface of the magnetic core to set the second state of the armature, and
wherein a gap having a predetermined width is defined between the inclined pole surface and the inclined magnetic surface between the armature and the magnetic core in the second state of the armature.