Apparatus for extracting or generating power

An apparatus for extracting power from fluid flow comprising:

• a traveler connected to an elongate track;
• a stator comprising an elongate conductor spaced from the elongate track, a first ferromagnetic unit, and a second ferromagnetic spaced from the first ferromagnetic unit, wherein each ferromagnetic unit comprises a first end proximal to the conductor and a second end distal to the conductor;
• and
• a translator coupled to the traveler comprising a base partially surrounding the conductor and extensions positioned on either side of a sequence of ferromagnetic units, wherein a width of each extension narrows from the base to an end distal to the conductor, wherein
• each extension comprises a first permanent-magnet layer with a magnetic flux oriented in a first direction, a first ferromagnetic layer, a second permanent-magnet layer with a magnetic flux oriented in a second direction, and a second ferromagnetic layer, wherein
• the first direction and second direction are opposite, and wherein
• the first ferromagnetic layer on one side of the sequence of ferromagnetic units is continuously connected to and offset from the first ferromagnetic layer on the second side of sequence of ferromagnetic units.

A method for extracting power from fluid flow comprising:

• providing an elongate track;
• connecting a traveler to the elongate track;
• spacing a stator from the elongate track, wherein the stator comprises an elongate conductor, a first ferromagnetic unit, and a second ferromagnetic spaced from the first ferromagnetic unit, wherein each ferromagnetic unit comprises a first end proximal to the conductor and a second end distal to the conductor;
• and
• coupling a translator to the traveler, wherein the translator comprises a base partially surrounding the conductor and extensions positioned on either side of the sequence of ferromagnetic units, wherein
• a width of each extension narrows from the base to an end distal to the conductor, wherein
• each extension comprises a first permanent-magnet layer with a magnetic flux oriented in a first direction, a first ferromagnetic layer, a second permanent-magnet layer with a magnetic flux oriented in a second direction, and a second ferromagnetic layer, wherein
• the first direction and second direction are opposite, and wherein
• the first ferromagnetic layer on one side of a sequence of ferromagnetic units is continuously connected to and offset from the first ferromagnetic layer on the second side of the sequence of ferromagnetic units.