Abstract:
The invention relates to an arrangement for backing up data as well as to a transport system (9) in which the aforementioned arrangement is used. The arrangement comprises objects (1, 2, 3, 4) that communicate between themselves via a communications channel (5). At least the first object (1) comprises an identifier (6), and at least a second object (2, 3, 4) comprises the backup (7) of the data of first object (1). At least the second object is fitted to transmit the aforementioned backup via the communications channel (5) and the first object is fitted to identify and to receive the transmitted backup from the communications channel.
Abstract:
The invention relates to a drive system (100) for driving an electric motor (110). The drive system (1009) comprises a drive control unit (120) and a frequency converter (130) comprising a speed controller (140). The drive control unit (120) is configured to: define a speed reference (210) of the electric motor (110); preset operating parameters of the speed controller (140) to provide a first response time of the speed controller (140), before a drive of the electric motor (110) is initiated; adjust at least one operating parameter of the speed controller (140) to provide a second response time of the speed controller (140), after the speed of the electric motor (110) reaches a constant speed, wherein the second response time is slower than the first response time; and readjust the at least one operating parameter of the speed controller (140) to provide the first response time, before a deceleration from the constant speed is initiated. The invention relates also to a method for controlling the drive system (100) for driving the electric motor (110).
Abstract:
The invention relates to a method for limiting the loading of an elevator assembly (1), and also to an elevator assembly (1). In the method according to the invention a plurality of optional operational objectives (2) are determined for the elevator traffic, one or more of these is selected at a time to be implemented as an operational objective of the elevator traffic using the selection criteria (3) of the operational objective, and a movement profile (4) of the elevator car is formed on the basis of one or more selected operational objectives, a limit value (6) is set for the maximum permitted loading of one or more parts (5a, 5b, 5c, 5d, 5e, 5f) of the elevator assembly, the loading of the aforementioned one or more parts (5a, 5b, 5c, 5d, 5e, 5f) of the elevator assembly is determined, and if it is deduced that the loading of the aforementioned one or more parts (5a, 5b, 5c, 5d, 5e, 5f) of the elevator assembly exceeds the limit value (6) for the maximum permitted loading, the loading of the one or more parts in question of the elevator assembly is limited by modifying the value of the movement magnitude of the elevator car in the movement profile (4) of the elevator car.
Abstract:
The invention relates to an adjustment device (1) for controlling the electric drive (2) of an elevator in connection with a voltage reduction of the supplying network. The electric drive of an elevator comprises an electric motor (3) and a power supply apparatus (4) of the electric motor for adjusting the supply voltage of the electric motor. The adjustment device comprises means (5, 6, 7) for controlling the power supply apparatus (4) of the electric motor and also a speed regulator (8) for adjusting the speed of the electric motor. The adjustment device (1) is arranged to determine the output voltage (9) of the power supply apparatus of the electric motor in relation to the permitted maximum value of the output voltage, and the adjustment device (1) is arranged to interrupt the operation of the speed regulator (8) but to continue the operation of the power supply apparatus (4) of the electric motor when the output voltage (9) of the power supply apparatus of the electric motor reaches the permitted maximum value.
Abstract:
The invention relates to a determination (1 ) of the loading state of an elevator system and also to a method for determining the loading state of an elevator system. The elevator system comprises an elevator car (2) and also a motor drive (3) for moving the elevator car. In the invention the loading state of the elevator system is determined on the basis of the position deviation (4) of the elevator motor that occurs during the determination of the loading state.
Abstract:
The invention concerns a method and an apparatus for controlling a three-or-more-phase motor (2) driven by a frequency converter (1). In the method, a change-over switch (3) of the frequency converter is controlled to a continuously conducting state (12,24) and at the same time the phase voltages or phase currents of the other phases are controlled by switching the change-over switches (3) in those motor phases at a switching frequency substantially higher than the frequency of the fundamental wave of the phase voltage or phase current. The apparatus comprises in conjunction with the frequency converter (1) a number of change-over switches (3), at least one change-over switch for each motor phase (17). The change-over switches comprise controllable change-over contacts (4,13). The apparatus further comprises in conjunction with the frequency converter means (5) for determining the motor phase currents and means (6) for controlling the change-over contacts.
Abstract:
The invention relates to an elevator drive unit (200) for managing a regenerative power of an elevator system (100). The elevator drive unit (200) comprises: first terminals (220a) for connecting the elevator drive unit (200) to the mains (230); second terminals (220b) for connecting the elevator drive unit (200) to an elevator hoisting motor (210); a frequency converter (240) for enabling a bidirectional transfer of power between the mains (230) and the elevator hoisting motor (210); and a control unit (250). The control unit is configured to: obtain an indication representing a detection of a special operational situation of the elevator system (100), introduce a non-zero power limit specific to the detected special operational situation of the elevator system (100), and control the frequency converter (240) to limit supply of the regenerative power from the elevator hoisting motor (210) to the mains (230) to the power limit. The invention relates also to an elevator system (100) and a method for managing a regenerative power of an elevator system (100).
Abstract:
The invention relates to a call-giving device and to a method for giving an elevator call. In the method a gesture (3 A, 3B) to be performed in an area (2) detecting a touch on the call-giving device (1) is detected.
Abstract:
The invention relates to an elevator system and also to a method for monitoring the operating condition of an elevator system. In the method samples (3) are taken of the control signal (2, 13, 14) of the drive device (1) of the elevator, from the series of samples (3) taken a frequency component (4) is determined that is characteristic to the part (5, 11, 12) of the elevator assembly driven with the drive device (1), and also the operating condition of the part (5, 11, 12) of the elevator assembly is monitored on the basis of the determined frequency component (4).
Abstract:
The invention relates to an elevator system and also to a method for ensuring the safety of an elevator system. The elevator system comprises a driving member (1) and also a hoisting means (3), which engages with the aforementioned driving member (1) by frictional traction. The elevator system comprises traction determination means (4, 5, 6A, 6B, 7) for determining the traction of the driving member (1), and the elevator system comprises a control circuit (4), which is configured to start a procedure ensuring the safety of the elevator system after the traction determination means (4, 5, 6A, 6B, 7) have detected that the traction of the driving member (1) has weakened.