1
Jacek F Gieras, Zbigniew Piech: Fabricated components of transverse flux electric motors. Otis Elevator Company, Carlson Gaskey & Olds, October 4, 2005: US06952068 (31 worldwide citation)

Transverse flux electric motors are made using a unique process where individual components are premade and then assembled together. A stator portion is made by nesting a coil between two stator core portions. The stator core portions are made from laminations or sintered powder materials. A separat ...


2
Jacek F Gieras, Zbigniew Piech: Method for making an electric motor. Otis Elevator Company, Carlson Gaskey & Olds, October 24, 2006: US07124495 (22 worldwide citation)

Transverse flux electric motors are made using a unique process where individual components are premade and then assembled together. A stator portion is made by nesting a coil between two stator core portions. In a disclosed example, distinct first and second stator core portions are formed. The sta ...


3
Zbigniew Piech, Jerome F Jaminet, Thomas M Kowalczyk, Edward E Ahigian, Richard E Kulak, Thomas M McHugh, Thomas He, Richard E Peruggi, David W Barrett: Elevator door drive using dual secondary linear induction motor. Otis Elevator Company, April 7, 1998: US05736693 (11 worldwide citation)

A linear induction motor utilizes a double-sided primary and a dual secondary to directly drive an elevator car door open and closed. The invention has the advantage of being compact: all magnetic-attractive loads are confined to a primary mount bracket, and all thrust loads are carried directly by ...


4
Jerome F Jaminet, Zbigniew Piech, Frank Guliuzza Jr, Thomas M McHugh, Edward E Ahigian, Thomas He, Richard E Peruggi, Thomas M Kowalczyk, Richard E Kulak, David W Barrett: Linear induction motor door drive assembly for elevators. Otis Elevator Company, March 18, 1997: US05612518 (8 worldwide citation)

The door or doors of an elevator are driven through their opening and closing cycles by one or more linear induction motor (LIM) assemblies in which the primary winding component of the LIM assembly is secured to the elevator cab structure and the LIM secondary component is secured to the cab door. ...


5
Richard E Peruggi, Thomas M McHugh, Edward E Ahigian, Jerome F Jaminet, Thomas He, Thomas M Kowalczyk, Richard E Kulak, David W Barrett, Zbigniew Piech: Triac drive for three-phase line-powered linear induction motor elevator door operator. Otis Elevator Company, September 15, 1998: US05808246 (7 worldwide citation)

An electronic motor drive produces a required motion profile for an elevator door operator actuated by a three-phase, line-powered linear induction motor (LIM) by means of an array of TRIAC switches producing selected forces from the LIM. The TRIAC drive is capable of producing acceleration, deceler ...


6
Roy S Colby, Zbigniew Piech: Magnetic bearing with reduced control-flux-induced rotor loss. United Technologies Corporation, Gerald L DePardo, October 13, 1998: US05821656 (6 worldwide citation)

A magnetic bearing with reduced control-flux-induced rotor loss includes a rotor 14, and a stator 12 having a plurality of slots S1-S16 around which coils 150-156 of a first Phase A and coils 160-166 of a second Phase B are wound. The winding configuration provides a two pole magnetic field around a ...


7
Zbigniew Piech, Pedro Baranda: Magnetic guidance for an elevator rope. Otis Elevator Company, July 31, 2001: US06267205 (6 worldwide citation)

An elevator system includes a magnetic guide that dampens vibration of a flat rope that move the car and counterweight up and down in the hoistway. The flat rope is guided through an opening in the magnetic guide between a pair of ferromagnetic flux concentrators having a set of teeth. The flux conc ...


8
Thomas M Kowalczyk, Zbigniew Piech: Double linear motor and elevator doors using same. Otis Elevator Company, September 7, 1999: US05949036 (6 worldwide citation)

A single linear motor has two sets of active sides with windings, secondaries and backirons. The front of the motor drives one load and the rear of the motor selectively drives another load. The windings on the two sides may have their phases reversed so as to drive the load in opposite directions i ...


9
Zbigniew Piech, Robin M Miller, John L Kettle: Interlaced conductor/back-iron secondary for induction motors. United Technologies Corporation, Gerald L DePardo, March 18, 1997: US05613188 (6 worldwide citation)

An induction motor is provided with a secondary portion 20 comprising an interlaced conductor/back-iron (or ferromagnetic) portion 60 and a purely ferromagnetic back-iron portion 62. The interlaced portion 60 comprises an electrically conductive lattice (or foam) material 61 having pores 63 filled w ...


10
Zbigniew Piech, Paul Dieter Wagner: Integrally skewed permanent magnet for use in an electric machine. Otis Elevator Company, Carlson Gaskey & Olds, March 30, 2004: US06713922 (5 worldwide citation)

A permanent magnet design includes a magnetic field that is skewed relative to a center line of the magnet body. One surface of the magnet is adapted to be mounted or supported on a motor assembly component such as the rotor. The other side of the magnet body includes at least one surface that is no ...