Abstract: A drive device of an elevator includes a frequency converter to be connected to a public AC supply network and an elevator motor. The frequency converter includes a network rectifier configured to be connected to the AC supply network, a motor bridge to be connected to the elevator motor and a DC intermediate circuit located between the network rectifier and the motor bridge. The motor bridge is controlled by a control circuit which feeds the motor bridge with control pulses to regulate the motor speed. The drive device further includes at least one drive prevention circuit connected between the control circuit and the motor bridge. The drive prevention circuit is configured to obtain a safety signal from an elevator safety circuit includes two separate safety input circuits each configured to be connected to the elevator safety circuit to receive a safety signal.

Abstract: A method and an elevator for moving an elevator car to a landing floor in case of a predefined event related to a main electrical power supply of an elevator are disclosed. The method includes charging energy from the main electrical power supply into an external electrical energy storage prior to detecting the predefined event related to the main electrical power supply, controlling an operation of an electric motor for moving the elevator car with an electrical drive to decelerate the elevator car and to produce regenerative electrical energy, selectively utilizing said energy charged from the main electrical power supply into the external electrical energy storage and said produced regenerative electrical energy to maintain an elevator brake in deactivated state.

Abstract: A door operating arrangement in an elevator, including a door operating unit located in the elevator car including a door controller and a door drive as well as a door motor configured to open and close elevator car doors, optionally together with elevator landing doors, a DC bus connecting the door operating unit via a travelling cable of the elevator car with a DC power source of the elevator. The voltage level of the DC bus is between 40 V and 120 V, the DC bus is connected to a capacitor bank located in the elevator car having a parallel connection of at least two capacitors and a total capacity value of at least 75.000 ?F, preferably at least 100.000 ?F.

Abstract: A wireless power transfer arrangement for an elevator car of an elevator is presented. The wireless power transfer arrangement comprises primary winding units distantly arranged with respect to each other at first positions of an elevator shaft along which the elevator car is configured to be moved, at least one secondary winding unit arranged to the elevator car. Each one of the primary winding units and the at least one secondary winding unit are arranged so that there is a gap between said winding units for enabling movement of the secondary winding unit with respect to the primary winding units and for establishing an inductive coupling between said winding units whenever said winding units are arranged to face each other at one of the first positions.

Abstract: The invention relates to a multicar elevator system, comprising: a plurality of elevator cars; an elevator shaft system; the plurality of the elevator cars and the elevator shaft system comprising a plurality of elevator components; a controller; the multicar elevator system further comprising: an elevator maintenance system configured to: receive the measurement data; determine the operational condition of the respective elevator component; and generate a maintenance signal for the at least one elevator component, a maintenance is scheduled in accordance with the operational condition of the respective at least one elevator component before a failure of the at least one elevator component. The invention also relates to a method and a computer program product.

Abstract: A method for operating, such as commissioning, an elevator, and an elevator are presented herein. The elevator comprises an electric linear motor for moving movable units. The method comprises moving a first movable unit along a linear stator of the electric linear motor in the elevator shaft, and determining at least one characteristic, such as a floor position or an air gap width of the electric linear motor, at a plurality of elevator shaft positions by the first movable unit, such as by a winding, a coil, or a sensor, during the moving. The method further comprises storing the determined at least one characteristic, and controlling moving of at least a second movable unit, such as comprising another of the elevator cars or a second motor unit, by utilizing the stored at least one characteristic.

Abstract: In a method for performing a manual drive in an elevator after mains power-off, the frequency converter of the motor is separated from mains, any safety blocking of the brake drive and/or motor drive is disabled, current is supplied from the battery to the brake drive to open the elevator brake and current is supplied from the battery to the drive control to allow regulation of the motor speed via the inverter bridge, the manual drive control observes the motor speed via the speed sensor and starts a speed feedback loop to regulate the motor speed to a manual drive reference value by feeding a three phase-AC current to the motor windings via the semiconductors of the inverter bridge, which manual drive speed reference is lower than the speed reference for normal elevator operation, when the car reaches a floor level the floor level indicator is activated, and the actuator is released whereafter the current supply from the battery to the elevator brake is interrupted and the previous disabled safety blocking o

Abstract: A wireless power transfer arrangement for an elevator, an elevator, and a method for transferring power wirelessly in an elevator are presented in this document. The arrangement includes at least one first unit including a first winding, a first alignment unit and a first base. The arrangement further includes at least one second unit comprising a second winding, a second alignment unit, and a second base. One of the at least one first unit and the at least one second unit is adapted for arranging to an elevator shaft and the other to a movable unit of the elevator. The first alignment unit and the second alignment unit are configured to be utilized for indicating when the first winding and the second winding are aligned with respect to each other for transferring power wirelessly therebetween.

Abstract: 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.

Abstract: A motor drive includes a rectifier bridge for connection with mains, a converter bridge configured to connect with an elevator motor and an intermediate DC circuit in-between. A capacitor and/or battery is connected between positive and negative branches of the intermediate DC circuit. At the mains side of the rectifier bridge a controlled main relay with contacts are configured to connect or disconnect the rectifier bridge with the corresponding mains phase. The motor drive comprises a charging circuit which comprises a charging switch connected with a current limiting component. The motor drive comprises a voltage sensor between positive and negative branches of the intermediate DC circuit. The voltage sensor is connected to a circuit comprising a reference value and a comparator. The evaluation circuit is configured to compare the actual sensor signal of the voltage sensor to the reference value and to operate the main relay based on the comparison.

Abstract: The invention refers to an electric linear motor comprising a longitudinal stator beam; at least one mover adapted to move along the stator beam; which stator beam comprises at least two side faces located at opposite sides of the stator beam, each of the side faces carrying ferromagnetic poles spaced apart by a pitch, and which mover comprises at least two counter-faces facing the respective side faces of the stator beam, wherein the at least two side faces, as well as the at least two counter-faces facing the respective side faces, are inclined or offset with respect to each other.

Abstract: The invention refers to an electric linear motor, control apparatus, transport system and a method. The electric linear motor comprises a longitudinal stator beam; at least one mover at least partially surrounding the stator beam and adapted to move along the stator beam; which stator beam comprises at least two side faces located at opposite sides of the stator beam, each of the side faces carrying ferromagnetic poles spaced apart by a pitch, and which mover comprises at least two counter-faces facing the respective side faces of the stator beam. The mover has in at least one of said counter-faces rotor units having at least one winding and at least one permanent magnet arranged to co-act with the ferromagnetic poles of the respective side faces of the stator beam.

Abstract: An electric linear motor and an elevator are presented. The electric linear motor includes a stator beam including at least two stators rails, and a number of movers configured to move with respect to the stator beam. Each mover includes at least two motor units configured to be arranged next to the stator beam such that each one of the motor units faces one of the stator rails, and each one of the at least two motor units includes at least two independently controllable motor subunits arranged consecutively with respect to a longitudinal direction of the motor unit. Each of said motor subunits includes windings for generating a magnetic field to form a magnetic coupling between the motor subunit and the respective stator rail.

Abstract: An electric linear motor for an elevator and a method for controlling the operation thereof are presented. The electric linear motor comprises at least one stator beam and at least one mover, wherein said at least one stator beam comprises at least two stators on opposite sides of the stator beam, and the at least one mover is in electromagnetic engagement with said at least two stators and configured to be moved relative to said stator beam. Said at least one mover comprises at least two units of electromagnetic components arranged on opposite sides of the stator beam to face said at least two stators for controlling the movement and the position of the mover with respect to said stator beam.

Abstract: The invention refers to an electric linear motor, control apparatus, transport system and a method. The electric linear motor comprises a longitudinal stator beam; at least one mover at least partially surrounding the stator beam and adapted to move along the stator beam; which stator beam comprises at least two side faces located at opposite sides of the stator beam, each of the side faces carrying ferromagnetic poles spaced apart by a pitch, and which mover comprises at least two counter-faces facing the respective side faces of the stator beam. The mover has in at least one of said counter-faces rotor units having at least one winding and at least one permanent magnet arranged to co-act with the ferromagnetic poles of the respective side faces of the stator beam.

Abstract: A method for implementing power management with a passenger transport system including at least one passenger transport installation of a building includes obtaining real-time grid frequency information of the power grid; receiving, from an external control platform, a control signal request associated with the real-time grid frequency; and initiating power management of the passenger transport system based on the control request signal using at least one energy storage coupled to the passenger transport installation.

Abstract: In the method for increasing the availability of an elevator standing unused at a landing the ambient temperature of at least one electrical device of the elevator is measured; and when the ambient temperature falls below a threshold value, electric current is conducted to at least one electrical device of the elevator for warming the electrical device in question. The patent application also includes an independent claim for a system for increasing the availability of an elevator standing unused at a landing.

Abstract: A passenger conveyor may include a conveyor motor controlled by a conveyor control via a motor drive, the motor drive including a frequency converter with a rectifier bridge, an intermediate DC circuit and a converter bridge connected with the conveyor motor. The rectifier bridge is configured to be connected to mains via at least one relay, which relay is controlled by the conveyor control, the conveyor comprises a deep sleep mode, in which the frequency converter as well as at least a major part of conveyor control is switched off. The intermediate DC circuit forms the power supply for the conveyor control. During the activation of the deep sleep mode, the conveyor control is configured to open the relay, whereby at least one signal circuit of the conveyor is configured to remain powered at least during the deep sleep mode.

Abstract: A door operating arrangement in an elevator, including a door operating unit located in the elevator car including a door controller and a door drive as well as a door motor configured to open and close elevator car doors, optionally together with elevator landing doors, a DC bus connecting the door operating unit via a travelling cable of the elevator car with a DC power source of the elevator. The voltage level of the DC bus is between 40 V and 120 V, the DC bus is connected to a capacitor bank located in the elevator car having a parallel connection of at least two capacitors and a total capacity value of at least 75.000 ?F, preferably at least 100.000 ?F.

Abstract: In a method for performing a manual drive in an elevator after mains power-off, the frequency converter of the motor is separated from mains, any safety blocking of the brake drive and/or motor drive is disabled, current is supplied from the battery to the brake drive to open the elevator brake and current is supplied from the battery to the drive control to allow regulation of the motor speed via the inverter bridge, the manual drive control observes the motor speed via the speed sensor and starts a speed feedback loop to regulate the motor speed to a manual drive reference value by feeding a three phase-AC current to the motor windings via the semiconductors of the inverter bridge, which manual drive speed reference is lower than the speed reference for normal elevator operation, when the car reaches a floor level the floor level indicator is activated, and the actuator is released whereafter the current supply from the battery to the elevator brake is interrupted and the previous disabled safety blocking o