Patents by Inventor Arto Nakari
Arto Nakari has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20190326845Abstract: A motor drive includes a rectifier bridge, which rectifier bridge is connected to an DC link, which is connected to an inverter bridge having phase outputs configured to be connected to an elevator motor, as well as a drive control controlling the semiconductor switches of the inverter bridge. The inverter bridge has upper semiconductor switches of the upper side connected to plus of the DC link and lower semiconductor switches of the lower side connected to minus of the DC link, the upper semiconductor switches are semiconductor switches without desaturation- and/or over-current protection whereas the lower semiconductor switches comprise a desaturation- and/or over-current protection, or vice versa.Type: ApplicationFiled: July 2, 2019Publication date: October 24, 2019Applicant: KONE CorporationInventors: Olli Pokkinen, Arto Nakari
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Patent number: 10450164Abstract: The invention relates to an arrangement for releasing the operating brake of an elevator in an emergency situation and for driving an elevator car of the elevator to a floor level, comprising at least one electric operating brake of the elevator as well as a brake release lever, which brake release lever is connected with the brake via a mechanical transmission means, which arrangement further comprises an overspeed governor connected with a gripping device of the elevator car. According to the invention in between the brake release lever and the brake a coupling device is arranged, which coupling device is controlled by the overspeed governor. Via this means the car velocity is controlled also during release of trapped passengers.Type: GrantFiled: September 21, 2018Date of Patent: October 22, 2019Assignee: Kone CorporationInventors: Olli Pokkinen, Teppo Vuorio, Arto Nakari
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Publication number: 20190248626Abstract: The invention relates to an elevator comprising an elevator motor and an elevator drive comprising a backup power supply and an emergency drive module to enable release of trapped passengers in case of a power fault, based on the energy of the backup power supply, whereby the elevator drive comprises a drive housing and the backup power supply is located in a separate backup module which is releasably supported in a mounting position at the drive housing of the elevator drive, which backup module comprises an insulated backup module housing and an electric interface which connects to a complementary interface of the elevator drive located at the drive housing.Type: ApplicationFiled: January 23, 2019Publication date: August 15, 2019Applicant: Kone CorporationInventors: Olli POKKINEN, Arto Nakari
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Publication number: 20190135584Abstract: An elevator includes an elevator motor; a motor drive for the elevator motor having a frequency converter including a rectifier bridge, an inverter bridge and a DC link in between, which frequency converter is controlled via a controller, the rectifier bridge being connected to AC mains via three feed lines including chokes, and the rectifier bridge being realised via controllable semiconductor switches; a contactor being located between the feed lines and AC mains; and a backup power supply at least for emergency drive operation. An emergency control is associated with the motor drive, which emergency control is configured to perform an automatic emergency drive. The emergency control is connected to a manual drive circuit having a manual drive switch for a manual rescue drive.Type: ApplicationFiled: October 23, 2018Publication date: May 9, 2019Applicant: KONE CorporationInventors: Arto Nakari, Olli Pokkinen
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Publication number: 20190135585Abstract: An elevator includes an elevator motor; a motor drive for the elevator motor having a frequency converter comprising a rectifier bridge, an inverter bridge and a DC link in between, which frequency converter is controlled via a controller, the rectifier bridge being connected to AC mains via three feed lines comprising chokes, and the rectifier bridge being realised via controllable semiconductor switches; a contactor being located between the feed lines and AC mains; a backup power supply at least for emergency drive operation; and an emergency control for performing an automatic emergency drive. The backup power supply is via a first switch connectable with only a first of said feed lines.Type: ApplicationFiled: October 26, 2018Publication date: May 9, 2019Applicant: KONE CorporationInventors: Arto NAKARI, Olli POKKINEN
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Patent number: 10273116Abstract: An elevator rescue system allows an elevator car of an elevator to be moved in an emergency situation. The elevator includes an elevator motor acting on hoisting ropes by which the elevator car is suspended including at least one electro-mechanical brake and an encoder outputting a signal corresponding to its speed. The rescue system includes a back-up power source, a jerk monitoring circuit connected to the encoder and including a memory storing an upper threshold value for the derivative of car acceleration, a brake feed circuit controlled by the jerk monitoring circuit, and a release switch connected to the jerk monitoring circuit and/or to the brake feed circuit.Type: GrantFiled: February 24, 2016Date of Patent: April 30, 2019Assignee: KONE CORPORATIONInventors: Ari Kattainen, Arto Nakari
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Publication number: 20190084793Abstract: The invention relates to 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, comprising 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 the motor controller is referenced to a first bus bar in the DC link, 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 referenced to the first bus bar of the DC link and is configured to transfer/cut the control pulses to the power switches, a galvanically iType: ApplicationFiled: September 5, 2018Publication date: March 21, 2019Applicant: KONE CorporationInventors: Arto NAKARI, Olli POKKINEN, Juhamatti NIKANDER
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Publication number: 20190036526Abstract: The invention relates to an electronic circuit comprising a switching means, having a monitoring circuit to monitor the switching status of the switching means. According to the invention the switching means comprises at least one semiconductor switch as a switching element, which semiconductor switch is connected to a gate driver which is controlled by a control signal (C) to effect switching of the semiconductor switch, the gate driver being supplied by a gate driver power supply, whereby the monitoring circuit is arranged between the semiconductor gate and its collector and comprises a series connection of an opto-coupler, a current-limiting resistor and a protection diode, which series connection is connected in series with the gate driver power supply.Type: ApplicationFiled: July 16, 2018Publication date: January 31, 2019Applicant: Kone CorporationInventors: Juhamatti NIKANDER, Arto NAKARI
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Patent number: 10189675Abstract: An adjustable brake controller of an elevator brake including a DC bus, first terminals for connecting the brake controller to a first magnetizing coil, second terminals for connecting the brake controller to a second magnetizing coil, a first controllable power switch coupled between the first terminals and the DC bus, the first controllable power switch being configured to supply electric power from the DC bus to the first magnetic coil responsive to a first control signal, a second controllable power switch coupled between the second terminals and the DC bus, the second controllable power switch being configured to supply electric power from the DC bus to the second magnetizing coil responsive to a second control signal, and a controller configured to generate the first and the second control signals for controlling the first and second power switches, respectively, with a brake open mode and a brake holding mode.Type: GrantFiled: February 6, 2017Date of Patent: January 29, 2019Assignee: Kone CorporationInventors: Henri Wenlin, Tuukka Korhonen, Lauri Stolt, Ari Pikivirta, Arto Nakari
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Publication number: 20190023531Abstract: The invention relates to an arrangement for releasing the operating brake of an elevator in an emergency situation and for driving an elevator car of the elevator to a floor level, comprising at least one electric operating brake of the elevator as well as a brake release lever, which brake release lever is connected with the brake via a mechanical transmission means, which arrangement further comprises an overspeed governor connected with a gripping device of the elevator car. According to the invention in between the brake release lever and the brake a coupling device is arranged, which coupling device is controlled by the overspeed governor. Via this means the car velocity is controlled also during release of trapped passengers.Type: ApplicationFiled: September 21, 2018Publication date: January 24, 2019Applicant: Kone CorporationInventors: Olli POKKINEN, Teppo VUORIO, Arto NAKARI
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Publication number: 20180327215Abstract: The arrangement comprises a drive driving an electric motor, a contactor and a control circuit connecting a control coil of the contactor to a power supply. The control circuit comprises a manual control part provided with a manually operated first switch, and an electronical control part provided with an electronically operated second switch and a processor controlling the second switch. The first switch and the second switch are connected in series in the control circuit with the power supply and the control coil of the contactor so that de-energization of the control coil of the contactor may be done either by the first switch or by the second switch.Type: ApplicationFiled: May 2, 2018Publication date: November 15, 2018Applicant: KONE CorporationInventors: Ari Kattainen, Juha-Matti Aitamurto, Juhamatti Nikander, Arto Nakari
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Patent number: 10106373Abstract: A brake controller including a DC link for supplying power, the DC link including a positive DC link rail and a negative DC link rail; output terminals for connecting to a magnetizing coil of an electromagnetic brake; a current path established between the DC link and the output terminals for conducting DC link power to the magnetizing coil; and two solid-state switches fitted into the current to adjust output terminal voltage by modulating the DC link voltage.Type: GrantFiled: September 24, 2015Date of Patent: October 23, 2018Assignee: KONE CORPORATIONInventor: Arto Nakari
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Publication number: 20180282123Abstract: 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.Type: ApplicationFiled: June 6, 2018Publication date: October 4, 2018Applicant: KONE CorporationInventors: Pasi RAASSINA, Pekka HYTTI, Arto NAKARI, Ari KATTAINEN, Juhamatti NIKANDER, Olavi VAIRIO
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Publication number: 20180198441Abstract: A power controller with a cable connected remote controlling device is disclosed. The remote controlling device is configured to transmit a pulsed instruction signal according to a predetermined signal pattern to the power controller. The power controller determines if the instruction signal corresponds with a predetermined signal pattern. If the instruction signal corresponds with a predetermined signal pattern, the controller passes the instruction signal to switches that control power supply of an electric device.Type: ApplicationFiled: December 21, 2017Publication date: July 12, 2018Applicant: Kone CorporationInventor: Arto Nakari
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Publication number: 20180093855Abstract: The invention refers to an elevator brake controller, comprising a brake supply circuit comprising a rectifier with a mains input side and a DC link output side, whereby in the mains input side and/or in the DC link output side at least one fuse is connected, a brake control circuit with at least one brake coil of an elevator brake, which brake coil is connected in series with a control switch configured to be controlled by an elevator control, which series connection of brake coil and control switch is connected to the DC link, a brake safety circuit which is connected between the brake supply circuit and the brake control circuit, which brake safety circuit comprises a first safety switch being connected in series with the brake coil as well as a second safety switch which is connected in parallel to the brake coil, whereby the first and second safety switches are configured to be controlled by an elevator safety circuit.Type: ApplicationFiled: September 1, 2017Publication date: April 5, 2018Applicant: KONE CorporationInventor: Arto Nakari
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Publication number: 20180090925Abstract: The invention relates to a motor drive comprising a rectifier bridge for connection with mains, a converter bridge configured to be connected with an elevator motor and an intermediate DC circuit in-between, whereby between a positive and a negative branch of the intermediate DC circuit at least one capacitor and/or battery is connected, whereby at the mains side of the rectifier bridge a controlled main relay with contacts is arranged, which are configured to connect or disconnect the rectifier bridge with the corresponding mains phase, characterized in that the motor drive comprises a charging circuit being connected between the mains and the rectifier bridge and/or intermediate DC circuit, which charging circuit comprises at least one charging switch connected in series with at least one current limiting component, and which motor drive comprises a voltage sensor connected between the positive and the negative branch of the intermediate DC circuit, which voltage sensor is connected to a fault evaluation cType: ApplicationFiled: July 7, 2017Publication date: March 29, 2018Applicant: Kone CorporationInventors: Pasi RAASSINA, Juhamatti NIKANDER, Pasi RINNESAARI, Ari-Pekka LAHTINEN, Arto NAKARI, Olli POKKINEN
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Patent number: 9873591Abstract: A brake controller, an elevator system and a method for performing an emergency stop are provided. The brake controller includes an input for connecting the brake controller to the DC intermediate circuit of the frequency converter driving the hoisting machine of the elevator, an output for connecting the brake controller to the electromagnet of the brake, a switch for supplying electric power from the DC intermediate circuit of the frequency converter driving the hoisting machine of the elevator via the output to the electromagnet of a brake, and also a processor with which the operation of the brake controller is controlled by producing control pulses in the control pole of the switch of the brake controller.Type: GrantFiled: November 5, 2014Date of Patent: January 23, 2018Assignee: KONE CORPORATIONInventors: Ari Kattainen, Pasi Raassina, Tapio Saarikoski, Lauri Stolt, Arto Nakari, Antti Kallioniemi
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Publication number: 20170313551Abstract: The invention concerns a rescue apparatus, an elevator as well as a retrofit kit. The rescue apparatus comprises a brake control unit having input terminals for connecting to a power supply, output terminals for connecting to a magnetizing coil of an electromagnetic brake, at least one controllable brake opening switch associated with at least one of the input terminals and adapted, in an open state, to prevent supply of current from the power supply to the magnetizing coil and, in a closed state, to allow supply of current from the power supply to the magnetizing coil. The rescue apparatus further comprises a control cable comprising one or more control signal wires and a remote control panel coupled via the control cable to the brake control unit.Type: ApplicationFiled: July 14, 2017Publication date: November 2, 2017Applicant: KONE CorporationInventors: Arto NAKARI, Ari KATTAINEN
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Publication number: 20170313548Abstract: A rescue apparatus for an elevator includes a brake control unit having input terminals for connecting to a power supply, output terminals for connecting to a magnetizing coil of an electromagnetic brake, at least one controllable brake opening switch associated with at least one of the input terminals and adapted, in an open state, to prevent supply of current from the power supply to the magnetizing coil and, in a closed state, to allow supply of current from the power supply to the magnetizing coil, a control cable including one or more control signal wires and a remote control panel for operating the at least one brake opening switch, the remote control panel being coupled via the control cable to the brake control unit.Type: ApplicationFiled: July 14, 2017Publication date: November 2, 2017Applicant: KONE CorporationInventors: Arto NAKARI, Ari KATTAINEN
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Patent number: 9802790Abstract: A drive device of an elevator includes a DC bus, a motor bridge connected to the DC bus for the electricity supply of the elevator motor, a control circuit with which control circuit the operation of the motor bridge is controlled by producing control pulses in control poles of high-side and low-side switches of the motor bridge, a brake controller, which comprises a switch for supplying electric power to an electromagnetic brake, a brake control circuit, with which the operation of the brake controller is controlled, an input circuit for the safety signal to be disconnected/connected from outside the drive device, drive prevention logic and brake drop-out logic connected to the input circuit and configured to prevent the passage of control pulses to the control poles of the high-side and/or low-side switches when the safety signal is disconnected.Type: GrantFiled: November 4, 2014Date of Patent: October 31, 2017Assignee: KONE CORPORATIONInventors: Ari Kattainen, Pasi Raassina, Tapio Saarikoski, Lauri Stolt, Arto Nakari, Antti Kallioniemi