Abstract: A brake includes a rotor rotatably coupled to a rotating body for rotation about a rotational axis. A brake plate and an armature are disposed on opposite sides of the rotor. A spring and an electromagnet urge the armature in opposite directions into and out of engagement with the rotor to move the rotor into and out of engagement with the brake plate and engage and disengage the brake. The brake plate and electromagnet each define a central bore configured to receive the rotating body. The brake is characterized by a target supported on a radially extending face of the rotating body or the rotor and a sensor aligned with the target through the central bore of the brake plate or the electromagnet. The sensor generates, responsive to the target, position signals indicative of a rotational position of the rotor and rotating body.

Abstract: A brake includes a rotor rotatably coupled to a rotating body for rotation about a rotational axis. A brake plate and an armature are disposed on opposite sides of the rotor. A spring and an electromagnet urge the armature in opposite directions into and out of engagement with the rotor to move the rotor into and out of engagement with the brake plate and engage and disengage the brake. The brake plate and electromagnet each define a central bore configured to receive the rotating body. The brake is characterized by a target supported on a radially extending face of the rotating body or the rotor and a sensor aligned with the target through the central bore of the brake plate or the electromagnet. The sensor generates, responsive to the target, position signals indicative of a rotational position of the rotor and rotating body.

Abstract: An electromagnetic braking device for braking a rotary shaft includes a friction disk mounted to the shaft and movable in translation and rotation, an outer part, and an intermediate part movable in translation between the friction disk and the outer part. At least one of the outer and intermediate parts is magnetic. At least one electromagnetic actuating member and at least one mechanical actuating member are housed in the other of the outer and intermediate parts. The intermediate part moves in a first direction toward the friction disk under the action of the mechanical actuating member and in a second direction toward the outer part under the action of the electromagnetic actuating member. A plurality of independent magnetic sheets move in translation between the intermediate and outer parts under the action of the mechanical actuating member and/or electromagnetic actuating member.