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公开(公告)号：US10723589B2
公开(公告)日：2020-07-28
申请号：US15637101
申请日：2017-06-29
Applicant: KONE Corporation
Inventor： Juhamatti Nikander , Olli Pokkinen
Abstract: The invention relates to an elevator comprising an elevator control having a motor drive of an elevator motor driving an elevator car on an movement path, which motor drive comprising a frequency converter with a rectifier bridge designed to be connected to mains, a converter bridge for feeding the elevator motor and an intermediate DC circuit located in-between, the elevator further comprising a brake drive for supplying energy to at least two motor brakes with the brake drive being connected to the intermediate DC circuit as well as an emergency power supply battery designed to allow safe release of passengers in case of a power outage. According to the invention the battery is connected to the intermediate DC circuit, and the elevator control has a measuring circuit connected to the intermediate DC circuit and the elevator control has a battery testing module which is configured to apply a defined load to the battery and to measure the voltage of the DC circuit for a defined time period. The battery testing module comprises a comparator for comparing the measured voltage with at least one stored first threshold value, whereby the elevator control is configured to issue a replacement signal for the battery dependent on the signal of the comparator.
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公开(公告)号：US20200010302A1
公开(公告)日：2020-01-09
申请号：US16449670
申请日：2019-06-24
Applicant: Kone Corporation
Inventor： Juhamatti Nikander
Abstract: The invention relates to an elevator comprising an elevator motor driving at least one elevator car in a hoisting path, which elevator motor is driven via a frequency converter controlled by a control device of the elevator. The frequency converter comprises a rectifier bridge and an inverter bridge and a DC link in-between. The elevator further comprises at least one elevator brake acting on a brake element rotating with the rotor of the elevator motor, which elevator brake is driven via a brake drive which is connected to the DC link of the frequency converter an comprises a DC/DC converter having its primary side connected to the DC link and its secondary side connected to a brake circuit comprising at least one brake coil of the elevator brake and at least one rectifying element. According to the invention in the primary side of the DC/DC converter a first semiconductor switch is connected which is controlled by the control device of the elevator. In the brake circuit a second semiconductor switch is connected which is also controlled by the control device of the elevator, whereby an earth fault indication circuit is connected between the brake circuit and earth. The earth fault indication circuit comprises an transmitting part of an opto-coupler, which opto-coupler has its sensor part connected to an earth fault transmission circuit connected to the control device of the elevator. The control device is configured to control the first and/or second semiconductor switch depending on the signal of the earth fault transmission circuit.
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公开(公告)号：US12012306B2
公开(公告)日：2024-06-18
申请号：US16379435
申请日：2019-04-09
Applicant: KONE Corporation
Inventor： Ari Kattainen , Juhamatti Nikander , Juha-Matti Aitamurto
CPC classification number: B66B5/0031 , B66B1/3407 , B66B1/3492 , B66B1/36 , B66B5/0025 , B66B19/00
Abstract: According to an aspect, there is provided a method for condition monitoring of inductive braking device of an elevator car in an elevator shaft, the method including determining that the elevator car is empty; determining that doors of the elevator car are closed; causing electromechanical brakes to hold the elevator car stationary in the elevator shaft; causing actuation of a braking condition for the elevator car with the inductive braking device; causing the electromechanical brakes to lift while the inductive braking device is in the braking condition; determining a value associated with the inductive braking device in response to causing the electromechanical brakes to lift while the inductive braking device is actuated; and determining an operating condition of the inductive braking device based on the value.
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公开(公告)号：US11661313B2
公开(公告)日：2023-05-30
申请号：US16001052
申请日：2018-06-06
Applicant: KONE Corporation
Inventor： Pasi Raassina , Pekka Hytti , Arto Nakari , Ari Kattainen , Juhamatti Nikander , Olavi Vairio
IPC: B66B5/00 , H02P29/02 , B66B5/02 , B66B1/30 , H02P29/024 , B66B11/04 , G05B19/048
CPC classification number: B66B5/02 , B66B1/30 , B66B5/0031 , B66B11/043 , G05B19/048 , H02P29/0241
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. Each of the safety input circuits is configured to interrupt the connection between the control circuit and the motor bridge in response to the safety signal status.
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Patent Agency Ranking
公开(公告)号：US11567138B2
公开(公告)日：2023-01-31
申请号：US17021394
申请日：2020-09-15
Applicant: Kone Corporation
Inventor： Teppo Vuorio , Juhamatti Nikander
IPC: G01R31/00 , G01R31/388 , G01R31/36 , G01R31/367
Abstract: A method for testing a capacity of a drive rescue battery includes opening a first switching device and second switching device to disconnect a LCL filter from AC mains and form a test load for testing the capacity of the drive rescue battery while disconnecting one of the LCL filter capacitors associated with a third phase from the test load, the test load including a series connection from one of the downstream LCL filter inductors and the LCL filter capacitors associated with the first phase to one of the LCL filter capacitors and the downstream LCL filter inductors associated with the second phase; and determining at least one of a voltage or a current of the drive rescue battery resulting from the test load.
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公开(公告)号：US11325808B2
公开(公告)日：2022-05-10
申请号：US16122700
申请日：2018-09-05
Applicant: KONE Corporation
Inventor： Arto Nakari , Olli Pokkinen , Juhamatti Nikander
Abstract: A transport conveyor drive having a rectifier and an inverter which are connected via a DC link, whereby the inverter comprises power switches for suppling electric power to an transport conveyor motor is disclosed. The transport convey drive comprises a motor controller for controlling the power switches of the inverter which is configured to produce control pulses in the control poles of the power switches, at least one safety signal interface, which is adapted to receive safety signals from a safety controller of the transport conveyor, and a brake control circuit having an output for supplying power to a brake coil of an electromagnetic brake, wherein at least one STO circuit is connected between the motor controller and each of the power switches of at least one half bridge of the inverter, the STO circuit being configured to transfer/cut the control pulses to the power switches.
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公开(公告)号：US11008197B2
公开(公告)日：2021-05-18
申请号：US15971346
申请日：2018-05-04
Applicant: KONE Corporation
Inventor： Juhamatti Nikander , Ari Kattainen , Pasi Raassina
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 of the brake drive and/or motor drive is enabled again.
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公开(公告)号：US10855071B2
公开(公告)日：2020-12-01
申请号：US15643786
申请日：2017-07-07
Applicant: Kone Corporation
Inventor： Pasi Raassina , Juhamatti Nikander , Pasi Rinnesaari , Ari-Pekka Lahtinen , Arto Nakari , Olli Pokkinen
IPC: H02H7/08 , H02M5/458 , H02H1/00 , H02P27/06 , B66B9/00 , B66B5/00 , B66B11/04 , B66B1/30 , H02H7/09 , H02H7/12
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.
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公开(公告)号：US09641064B2
公开(公告)日：2017-05-02
申请号：US14475310
申请日：2014-09-02
Applicant: KONE Corporation
Inventor： Juhamatti Nikander
CPC classification number: H02M1/4208 , B66B1/34 , H02J3/1892
Abstract: The invention relates to a method and an electrical converter of an elevator. In the method a controller of the electrical converter determines a first reactive power produced by a smoothing filter using pre-determined information on impedance of the smoothing filter. The controller may also receive information on a second reactive power from a remote node over a communication channel, the second reactive power being produced to a grid. The controller adds the first reactive power and the second reactive power to yield a total reactive power. The controller requests the electrical converter to make a plurality of compensative connections in the converter matrix to compensate the first reactive power or the total reactive power.
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