An electric linear motor, an elevator and a method for controlling rotation of a mover with respect to a stator beam are presented. The electric linear motor includes a number of stator beams, wherein at least one of them includes stators extending in a longitudinal direction of the beam. The motor also includes a number of movers, wherein at least one them includes armatures, wherein each armature is adapted for establishing an electromagnetic coupling with a corresponding stator for moving the mover. The motor also includes an air gap regulator for regulating movement of the mover with respect to the stator beam, wherein the air gap regulator includes guide element(s) arranged for limiting the rotation of the mover with respect to the stator beam.

A multi-phase linear induction machine includes at least one armature which can be disposed in an elevator hoistway and is configured to electrically conduct electromagnetic energy, and a plurality of stators which can be coupled to an elevator car that is configured to travel through the hoistway. Each of the stators are configured to conduct electrical current therethrough and generate an electromagnetic field in response to the current. The electromagnetic field induces eddy currents that flow through the at least armature to generate a magnetic force to move the elevator car through the hoistway.

The invention refers to an electric linear motor comprising at least one linear stator designed to be located in a fixed correlation to an environment, particularly building, and at least one mover designed for connection with an element to be moved and co-acting with the stator,

which motor comprises a stator beam supporting said at least one stator, which stator beam has at least one side face carrying ferromagnetic poles of said stator spaced apart by a pitch, and which mover comprises at least one counter-face facing said side face(s) of the stator beam, in which counter-face electro-magnetic components of the mover are located.

A ropeless elevator system 10 includes a lane 13, 15, 17. One or more cars 20 are arranged in the lane. At least one linear motor 38, 40 is arranged along one of the lane and the one or more cars, and a magnet 50, 60 is arranged along the other of the lane and the one or more cars. The at least one magnet is responsive to the at least one linear motor. A linear motor controller 70 is operatively connected to the at least one linear motor, and a lane controller 80 is operatively connected to the linear motor controller. A back electro-motive force (EMF) module 84 is operatively connected to at least one of the linear motor controller and the lane controller. The lane controller being configured and disposed to control stopping one of the one or more cars based on a back EMF signal from the at least one linear motor determined by the EMF module.

An elevator system includes a first elevator car (28) constructed and arranged to move in a first lane (30, 32, 34) and a first propulsion system (40) constructed and arranged to propel the first elevator. An electronic processor of the elevator system is configured to selectively control power delivered to the first propulsion system (40). The electronic processor includes a software-based power estimator configured to receive a first weight signal and a nm trajectory signal for calculating a power estimate and comparing the power estimate to a maximum power allowance. The electronic processor is configured to output an automated command signal if the power estimate exceeds the maximum power allowance.

A method for levitation control of a linear motor includes supplying an alternating current or alternating voltage to at least one oscillating circuit including at least one sensing coil being or assumed to be arranged in a fixed spatial correlation to a mover part of the linear motor such that an opening plane of the sensing coil faces a sensor counter-surface of a stator part of the linear motor with a gap therebetween; receiving a response signal from the oscillating circuit; determining a gap length of the gap based on the response signal; and controlling the gap length by driving a magnetic levitation unit of the linear motor based on the determined gap length. An inductive sensing device and an elevator system, and a method for determining a position of the linear motor are also disclosed.

A transport system in a structure includes a car and a plurality of motor modules. The car is constructed and arranged to move along a lane generally defined at least in-part by the structure. The plurality of motor modules are distributed along the lane and are constructed and arranged to propel the car. Each one of the pluralities of motor modules include an embedded power module.

A device for an elevator, an elevator, and a method for moving an elevator car are presented. The device includes a linear mover including a winding. The linear mover is adapted to establish an electromagnetic engagement by the winding with a linear stator of a first stator beam. The device further includes an electrical energy storage unit, such as at least one battery, and an electrical converter unit arranged to supply electrical current from the electrical energy storage unit to the winding for moving the device along the first stator beam. The at least one linear mover, the electrical energy storage, and the electrical converter unit are integrated into a body of the device, and the device is adapted for attaching removably to an elevator car of the elevator and, optionally, to a further device of the elevator.

A linear motor includes a stator and a mover adapted to move along the stator, one of them including non-magnetic core coils arranged in a row in a longitudinal direction. The other of the stator and the mover includes permanent magnets arranged in at least two adjacent rows in a longitudinal direction. The rows of permanent magnets are separated by a gap(s) dimensioned for receiving the row(s) of coils. At least one of the rows of permanent magnets may be arranged in a form of a Halbach array. The elevator may include an elevator shaft and an elevator car arranged to be moved by the linear motor in the elevator shaft.

A passenger/goods conveyor includes at least one transport entity connected with at least one mover, which co-acts together with at least one stator beam defining a movement trajectory for the transport entity. The at least one mover and the stator beam form a linear motor, the stator beam carrying on at least two opposite sides stator faces with stator poles which again co-act with corresponding mover counter faces including mover units facing the stator poles. The mover units are arranged successively in a running direction of the mover, whereby between the two stator faces and the corresponding mover counter faces air gaps are formed, whereby each mover unit includes electro-magnetic components configured to co-act with the stator poles to provide a propulsion force to accelerate and move the mover along the stator beam as well as an attraction force between the stator faces and counter faces to adjust both air gaps. In connection with at least one of the counter faces of the mover, at least one magnetic sensor is positioned facing the stator poles. Thus, the torque angle can always be calculated even after replacement of sensor or drive components.