To provide a motor system that can control the position of a control object in multiple directions while suppressing the number of required switching elements. A motor system includes: a power conversion device including first, second, and third up-down arms each including two switching elements connected in series; a control object; and a first load including a magnetic pole tooth facing the control object, and a winding wound around the magnetic pole tooth. The motor system includes a second load including two magnetic pole teeth facing each other in a second direction with the control object therebetween, and a winding wound around one or both of the magnetic pole teeth. The power conversion device provides a force with respect to a first direction to the control object through an output to the first load, and provides a force with respect to the second direction to the control object through an output to the second load.

An active magnetic bearing apparatus for supporting a rotor of a rotary machine comprises an axial magnetic bearing unit and a radial magnetic bearing unit mounted directly to one another. One of the axial magnetic bearing unit and the radial magnetic bearing unit is mounted to a support for attachment to a housing of the rotary machine.

A radial stator includes a stator core, and the stator core includes a stator outer ring. M magnetic poles are arranged on an inner circumferential wall of the stator outer ring, and are evenly distributed along the inner circumferential wall of the stator outer ring. The M magnetic poles include M.sub.1 magnetic poles arranged along the inner circumferential wall of the stator outer ring and M.sub.2 magnetic poles arranged along the inner circumferential wall of the stator outer ring; M≥2, M.sub.1≥1, and M.sub.2≥1; the M.sub.1 magnetic poles and the M.sub.2 magnetic poles are arranged on two sides of the stator outer ring with respect to a radial direction thereof, respectively; each of the M.sub.1 magnetic poles is provided with a first winding; and each of the M.sub.2 magnetic poles is provided with a second winding; and a coil turn N.sub.1 of the first winding is greater or less than a coil turn N.sub.2 of the second winding.

A turbine and a turbine-generator device for use in electricity generation. The turbine has a universal design and so may be relatively easily modified for use in connection with generators having a rated power output in the range of 50 KW to 5 MW. Such modifications are achieved, in part, through use of a modular turbine cartridge built up of discrete rotor and stator plates sized for the desired application with turbine brush seals chosen to accommodate radial rotor movements from the supported generator. The cartridge may be installed and removed from the turbine relatively easily for maintenance or rebuilding. The rotor housing is designed to be relatively easily machined to dimensions that meet desired operating parameters.

A thrust magnetic bearing includes a coil formed by winding a conductive wire, and a core that houses the coil. The core is provided with a refrigerant inlet and a refrigerant outlet. A refrigerant flow path connecting the refrigerant inlet and the refrigerant outlet is provided between the coil and the core. The refrigerant flow path is formed so that a refrigerant flowing from the refrigerant inlet to the refrigerant outlet mainly flows along the coil in a winding direction of the coil.

A thrust magnetic bearing includes a coil formed by winding a conductive wire, and a core that houses the coil. The core is provided with a refrigerant inlet and a refrigerant outlet. A refrigerant flow path connecting the refrigerant inlet and the refrigerant outlet is provided between the coil and the core. The refrigerant flow path is formed so that a refrigerant flowing from the refrigerant inlet to the refrigerant outlet mainly flows along the coil in a winding direction of the coil.

A design method for a six-pole hybrid magnetic bearing with symmetrical suspension forces. A magnetic bearing is designed by taking particularity that a permanent magnet of the six-pole hybrid magnetic bearing with symmetrical suspension forces forms magnetic polarity on a stator suspension tooth as the starting point and taking maximum suspension forces in x and y directions and a saturation magnetic density as constraint conditions. Compared with a method for designing the maximum radial suspension force in a +x direction in a manner that a saturation magnetic induction intensity is reached in the +x direction and the magnetic induction intensity in a −x direction is zero in existing design of a six-pole hybrid magnetic bearing, this method enables the maximum magnetic suspension forces in the +x and +y directions to be same, so that the radial suspension forces of the six-pole hybrid magnetic bearing are designed to be completely symmetrical.

An electric motor system includes a drive shaft, first and second magnetic bearing portions facing each other and supporting the drive shaft, an electric motor to rotate the drive shaft, and a gap detection unit to detect a position of the drive shaft During rotation of the drive shaft, greater external force acts, on average, on the drive shaft in a first direction than in a second direction. The first and second direction extend from the second and first magnetic bearing portions to the first and second magnetic bearing portion. The first and second magnetic bearing portions produce first and second magnetic forces on the drive shaft in the first and second directions. A magnitude of the second magnetic force is greater than a magnitude of the first magnetic force. The gap detection unit is arranged closer to the second magnetic bearing portion than to the first magnetic bearing portion.

An electric motor system includes a drive shaft, first and second magnetic bearing portions facing each other and supporting the drive shaft, an electric motor to rotate the drive shaft, and a gap detection unit to detect a position of the drive shaft During rotation of the drive shaft, greater external force acts, on average, on the drive shaft in a first direction than in a second direction. The first and second direction extend from the second and first magnetic bearing portions to the first and second magnetic bearing portion. The first and second magnetic bearing portions produce first and second magnetic forces on the drive shaft in the first and second directions. A magnitude of the second magnetic force is greater than a magnitude of the first magnetic force. The gap detection unit is arranged closer to the second magnetic bearing portion than to the first magnetic bearing portion.

A system for transporting fiber ends can comprise a fiber supply assembly that supplies fiber along a first axis. A plurality of eyeboards can be positioned along the first axis. Each eyeboard can define a plurality of openings therethrough. Each opening of the plurality of openings can be configured to receive therethrough a fiber from the fiber supply assembly. A track can extend along the first axis. The track can pass proximate to each eyeboard of the at least one eyeboard. A carriage can be movable along the track. The carriage can define at least one fiber attachment element. An actuator can be configured to move the carriage along the track.