Patents by Inventor Lauri Stolt

Lauri Stolt 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).

  • Publication number: 20210139275
    Abstract: According to an aspect, there is provided an elevator parking brake comprising brake pads configured to provide a braking force against a guide rail in a loading and unloading situation of an elevator car; and at least one sensor. The elevator parking brake is configured to allow a predetermined amount of movement within the elevator parking brake in the loading and unloading situation of the elevator car, and the at least one sensor is configured to provide at least one indication associated with the movement within the elevator parking brake in the loading and unloading situation of the elevator car.
    Type: Application
    Filed: October 15, 2020
    Publication date: May 13, 2021
    Applicant: Kone Corporation
    Inventors: Antti KOSKINEN, Petri HARTIKAINEN, Pekka HALLIKAINEN, Janne SALOMAKI, Antti SAARELAINEN, Henri WENLIN, Risto JOKINEN, Timo VLASOV, Mikko PURANEN, Esa PUTKINEN, Jyrki LAAKSONHEIMO, Lauri STOLT, Tuukka KAUPPINEN, Jarkko SALORANTA, Hilkka HAMALAINEN, Sami SAARELA
  • Patent number: 10972015
    Abstract: The invention is related to a method of initiating a regenerative converter (1) and corresponding converter (1) including a line bridge (2) and a machine bridge (3), which are interconnected via a DC intermediate circuit (8A, 8B). The method comprises charging, through the line bridge (2) and while the machine bridge (3) remains inactive, the DC intermediate circuit (8A, 8B) to a target voltage (14) higher than peak value of the mains voltage (13).
    Type: Grant
    Filed: March 31, 2015
    Date of Patent: April 6, 2021
    Assignee: KONE CORPORATION
    Inventors: Lauri Stolt, Juhamatti Nikander
  • Patent number: 10954101
    Abstract: Brake release sensors for an elevator can be replaced by an arrangement wherein the brake release is determined from the force caused by the brake. This is achieved by providing measuring device for measuring the weight of an elevator car between the brake and the motor body so that the weight of the elevator car is measured only when the brake is on.
    Type: Grant
    Filed: June 30, 2017
    Date of Patent: March 23, 2021
    Assignee: Kone Corporation
    Inventors: Ari Kattainen, Lauri Stolt
  • Patent number: 10934133
    Abstract: A safety arrangement of an elevator and a method for monitoring electrical safety in an elevator system is disclosed. The safety arrangement of an elevator includes a motor drive of the elevator, which motor drive includes a main circuit, an accessible conducting part, which is earthed, an insulator, which is adapted to electrically insulate the aforementioned conducting part from the aforementioned main circuit and also a monitoring circuit, which is configured to determine an earth fault of the aforementioned main circuit occurring via the aforementioned conducting part. The monitoring circuit is configured to form a signal indicating the danger of electric shock in the motor drive of the elevator, if the aforementioned earth fault is diagnosed.
    Type: Grant
    Filed: November 6, 2017
    Date of Patent: March 2, 2021
    Assignee: KONE CORPORATION
    Inventors: Ari Kattainen, Juha-Matti Aitamurto, Lauri Stolt
  • Publication number: 20200283261
    Abstract: A method includes commanding a brake controller to open a machinery brake, measuring the brake current of the machinery brake, and when the measured brake current does not meet or exceed a predetermined threshold value within a predetermined time period, then generating a signal indicating failure of the machinery brake and cancelling the elevator run sequence, else executing the elevator run sequence.
    Type: Application
    Filed: March 3, 2020
    Publication date: September 10, 2020
    Applicant: KONE Corporation
    Inventors: Alessio Calcagno, Lauri Stolt, Petteri Kangas, Risto Jokinen
  • Publication number: 20200287485
    Abstract: A method for determining a rotor position of an electric motor, an elevator and an electrical converter unit are presented. The method comprises supplying a first excitation signal to the electric motor, determining a first response signal generated in the motor in response to the first excitation signal, determining, based on the first response signal, an electrical angle of a direct axis of the motor with respect to a stationary reference frame, supplying a second excitation signal to the motor, wherein the second excitation signal is based on the determined electrical angle, determining a second response signal generated in the motor in response to the second excitation signal, and determining the rotor position based on the second response signal.
    Type: Application
    Filed: February 19, 2020
    Publication date: September 10, 2020
    Applicant: KONE Corporation
    Inventors: Tuukka Kauppinen, Lauri Stolt, Mikko Paakkinen
  • Patent number: 10196234
    Abstract: A method for controlling an elevator includes controlling the speed of a vertically moving elevator car during its run from a starting landing to a destination landing according to speed settings, the speed settings defining a constant target speed for the elevator car. The method includes obtaining measurement data of the ongoing run, which measurement data describes vertical speed and/or vertical acceleration of the vertically moving elevator car, determining whether the measurement data meets one or more predetermined criteria indicating unintended vertical speed and/or unintended vertical acceleration, and changing the speed settings of the current run by lowering the constant target speed from a first constant target speed to a second constant target speed if the measurement data meets said one or more predetermined criteria, continuing the run without intermediate stops to said destination landing. An elevator is provided to implement the method.
    Type: Grant
    Filed: January 28, 2016
    Date of Patent: February 5, 2019
    Assignee: KONE CORPORATION
    Inventors: Ari Kattainen, Lauri Stolt
  • Patent number: 10196237
    Abstract: A method for performing an emergency stop with an elevator and a safety arrangement of an elevator. In the method, when an emergency stop criterion is fulfilled, the elevator car is driven with the electric motor of the hoisting machine to a stop with a given deceleration profile.
    Type: Grant
    Filed: February 23, 2016
    Date of Patent: February 5, 2019
    Assignee: KONE CORPORATION
    Inventors: Ari Kattainen, Antti Hovi, Petteri Kangas, Lauri Stolt
  • Patent number: 10189675
    Abstract: 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: Grant
    Filed: February 6, 2017
    Date of Patent: January 29, 2019
    Assignee: Kone Corporation
    Inventors: Henri Wenlin, Tuukka Korhonen, Lauri Stolt, Ari Pikivirta, Arto Nakari
  • Patent number: 10179718
    Abstract: An elevator includes a control system for monitoring the load of a car, which control system is adapted to prevent the normal starting of the elevator, optionally also including relevelling, when there is an overload in the car. The elevator includes at least one position measuring device, speed measuring device and/or movement measuring device in order to determine the movement and/or position of the car, and the control system of the elevator is adapted to remove the prevention of normal starting when at least one said position measuring device, speed measuring device and/or movement measuring device detects that the car moved or is moving upwards in the elevator shaft.
    Type: Grant
    Filed: April 7, 2016
    Date of Patent: January 15, 2019
    Assignee: KONE CORPORATION
    Inventors: Lauri Stolt, Risto Jokinen
  • Patent number: 10087045
    Abstract: The system for controlling the opening and/or closing of a normally-closed machinery brake opening by means of at least one magnetizing coil and closing by means of at least one closing spring comprises: at least one estimation and control loop according to the invention and at least one measuring and control circuit according to the invention, which are connected or can be connected to each other, and of which a) the estimation and control loop is configured to use an input (I(t)) produced by the measuring and control circuit, and b) the measuring and control circuit is configured to use the modulation reference (UGE) produced by the estimation and control loop for connecting the voltage (U9) to be connected over the magnetizing coil.
    Type: Grant
    Filed: November 21, 2016
    Date of Patent: October 2, 2018
    Assignee: KONE CORPORATION
    Inventors: Lauri Stolt, Tuukka Korhonen
  • Patent number: 10029883
    Abstract: An elevator includes an elevator car and lifting machinery including a traction sheave, an electromechanical machinery brake, and an electric motor having a rotor. The traction sheave, the electromechanical machinery brake and the rotor of the electric motor are connected via a shaft, whereby the lifting machinery moves the elevator car upwards and downwards in a vertically extending elevator shaft controlled by a main control unit.
    Type: Grant
    Filed: September 20, 2016
    Date of Patent: July 24, 2018
    Assignee: KONE CORPORATION
    Inventors: Lauri Stolt, Matti Räsänen, Mika Alvesalo
  • Patent number: 9912265
    Abstract: Invention is related to a method for controlling an alternating current electric machine with a frequency converter including a controllable machine bridge and a controllable line bridge, and a corresponding frequency converter. The method comprises calculating a line bridge control signal, controlling line current through the line bridge using the line bridge control signal, measuring or estimating rotor pole position of the electric machine, calculating a machine bridge control signal as a function of the rotor pole position, updating the machine bridge control signal when the rotor pole position changes, and controlling current of the electric machine through the machine bridge using the machine bridge control signal.
    Type: Grant
    Filed: January 21, 2015
    Date of Patent: March 6, 2018
    Assignee: Kone Corporation
    Inventor: Lauri Stolt
  • Publication number: 20180057308
    Abstract: A safety arrangement of an elevator and a method for monitoring electrical safety in an elevator system is disclosed. The safety arrangement of an elevator includes a motor drive of the elevator, which motor drive includes a main circuit, an accessible conducting part, which is earthed, an insulator, which is adapted to electrically insulate the aforementioned conducting part from the aforementioned main circuit and also a monitoring circuit, which is configured to determine an earth fault of the aforementioned main circuit occurring via the aforementioned conducting part. The monitoring circuit is configured to form a signal indicating the danger of electric shock in the motor drive of the elevator, if the aforementioned earth fault is diagnosed.
    Type: Application
    Filed: November 6, 2017
    Publication date: March 1, 2018
    Applicant: KONE Corporation
    Inventors: Ari Kattainen, Juha-Matti Aitamurto, Lauri Stolt
  • Patent number: 9884742
    Abstract: A safety arrangement of an elevator and a method for monitoring electrical safety in an elevator system is disclosed. The safety arrangement of an elevator includes a motor drive having a main circuit, an accessible conducting part, which is earthed, an insulator, which is adapted to electrically insulate the aforementioned conducting part from the aforementioned main circuit and also a monitoring circuit, which determines an earth fault of the aforementioned main circuit occurring via the conducting part. The monitoring circuit forms a signal indicating the danger of electric shock in the motor drive of the elevator, if the earth fault is diagnosed.
    Type: Grant
    Filed: April 3, 2015
    Date of Patent: February 6, 2018
    Assignee: KONE CORPORATION
    Inventors: Ari Kattainen, Juha-Matti Aitamurto, Lauri Stolt
  • Patent number: 9873591
    Abstract: 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: Grant
    Filed: November 5, 2014
    Date of Patent: January 23, 2018
    Assignee: KONE CORPORATION
    Inventors: Ari Kattainen, Pasi Raassina, Tapio Saarikoski, Lauri Stolt, Arto Nakari, Antti Kallioniemi
  • Patent number: 9868615
    Abstract: Stall condition in an elevator is potentially dangerous situation if it causes slack to the ropes of the elevator. In such situation a counterweight or elevator car does not move even if the hoisting machine is still operating. This situation may be prevented by stopping the elevator as early as possible after detecting such stall condition. The detection of the stall condition is based on monitoring the torque generated by the hoisting machine of the elevator. When rapid change in the torque is detected a stall condition is suspected. The elevator may be stopped or an alarm may be launched when the stall condition is suspected.
    Type: Grant
    Filed: October 15, 2014
    Date of Patent: January 16, 2018
    Assignee: Kone Corporation
    Inventors: Jari Helvilä, Sakari Korvenranta, Petter Martonen, Petteri Valjus, Jukka Laitinen, Lauri Stolt
  • Publication number: 20170349403
    Abstract: Brake release sensors for an elevator can be replaced by an arrangement wherein the brake release is determined from the force caused by the brake. This is achieved by providing measuring device for measuring the weight of an elevator car between the brake and the motor body so that the weight of the elevator car is measured only when the brake is on.
    Type: Application
    Filed: June 30, 2017
    Publication date: December 7, 2017
    Applicant: Kone Corporation
    Inventors: Ari KATTAINEN, Lauri Stolt
  • Patent number: 9802790
    Abstract: 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: Grant
    Filed: November 4, 2014
    Date of Patent: October 31, 2017
    Assignee: KONE CORPORATION
    Inventors: Ari Kattainen, Pasi Raassina, Tapio Saarikoski, Lauri Stolt, Arto Nakari, Antti Kallioniemi
  • Patent number: 9776829
    Abstract: The invention relates to a safety arrangement of an elevator, which includes sensors configured to indicate functions that are critical to the safety of the elevator, and also a safety circuit, with which the data formed by the sensors indicating the safety of the elevator is read. The safety arrangement includes a drive device including a control circuit of a motor bridge, an input circuit for a safety signal that can be disconnected/connected from outside the drive device, and also drive prevention logic, to prevent the passage of control pulses to the control poles of high-side and/or low-side switches of the motor bridge when the safety signal is disconnected. The safety circuit brings the elevator into a state preventing a run by disconnecting the safety signal and removes the state preventing a run by connecting the safety signal.
    Type: Grant
    Filed: November 5, 2014
    Date of Patent: October 3, 2017
    Assignee: KONE CORPORATION
    Inventors: Ari Kattainen, Pasi Raassina, Tapio Saarikoski, Lauri Stolt, Arto Nakari, Antti Kallioniemi