Patents by Inventor Pekka Jahkonen
Pekka Jahkonen 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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Patent number: 8412373Abstract: A conveying system, includes control devices for controlling the operation of the conveying system. The conveying system also includes a central control. The central control is arranged to select from a plurality of the different operating modes of the conveying system the operating mode to be used at any given time. The central control is connected to the control devices with a communications channel for indicating the operating mode selected to the control devices.Type: GrantFiled: January 17, 2012Date of Patent: April 2, 2013Assignee: Kone CorporationInventors: Petteri Kangas, Pekka Jahkonen
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Patent number: 8384337Abstract: A conveyor system includes an electric motor to move a conveyor. A voltage determining device is coupled to an alternating-electricity source that supplies alternating electricity to the conveyor system. A power supply appliance supplies power between the electric motor and the alternating-electricity source. The power supply appliance includes an inverter and an inverter control. The inverter includes a rectifying bridge and a motor bridge. The rectifying bridge input is coupled to the alternating-electricity source and the rectifying bridge output is coupled to the motor bridge input. The motor bridge output is coupled to the electric motor. The inverter control is coupled between the voltage determining device and the motor bridge. The inverter control is responsive to frequency and phase of the determined voltage of the alternating-electricity source to adjust the frequency and phase of the motor bridge output voltage such that the motor bridge output voltage is made to be essentially constant.Type: GrantFiled: September 2, 2010Date of Patent: February 26, 2013Assignee: Kone CorporationInventor: Pekka Jahkonen
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Patent number: 8217617Abstract: A power supply appliance of a transport system is provided. The appliance includes a power rectifier of the motor, an AC voltage circuit, a control voltage circuit, a power supply circuit of the safety devices, an AC/DC transformer fitted between the AC voltage circuit and the control voltage circuit to supply power from the AC voltage circuit to the control voltage circuit, and a power shaping circuit.Type: GrantFiled: October 30, 2009Date of Patent: July 10, 2012Assignee: Kone CorporationInventor: Pekka Jahkonen
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Patent number: 8207631Abstract: The power control of a transport system comprises an electric motor for moving the transport appliance as well as a power supply appliance of the motor, which comprises an intermediate circuit. The power supply appliance of the motor is fitted between the power source and the electric motor. The transport system further comprises a network rectifier, which is fitted between the power source and the intermediate circuit of the power supply appliance of the motor for supplying braking power returning from the motor of the transport appliance to the power source.Type: GrantFiled: December 18, 2009Date of Patent: June 26, 2012Assignee: Kone CorporationInventor: Pekka Jahkonen
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Patent number: 8183813Abstract: The invention relates to a frequency converter, which is fitted to supply power between a polyphase alternating electricity source and an electric machine. The frequency converter comprises a network rectifier connected to the alternating electricity source and an inverter connected to the electric machine. The power supply is implemented in the network rectifier and in the inverter with solid-state change-over switches, which change-over switches comprise an antiparallel-connected diode fitted in parallel with the controllable switch. The network rectifier and the inverter are connected to each other with an intermediate circuit, which intermediate circuit is implemented without a passive energy storage.Type: GrantFiled: July 13, 2010Date of Patent: May 22, 2012Assignee: Kone CorporationInventors: Pekka Jahkonen, Antti Kallioniemi
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Publication number: 20120116574Abstract: A conveying system, includes control devices for controlling the operation of the conveying system. The conveying system also includes a central control. The central control is arranged to select from a plurality of the different operating modes of the conveying system the operating mode to be used at any given time. The central control is connected to the control devices with a communications channel for indicating the operating mode selected to the control devices.Type: ApplicationFiled: January 17, 2012Publication date: May 10, 2012Inventors: Petteri KANGAS, Pekka JAHKONEN
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Patent number: 8053931Abstract: The power control of a transport system comprises an electric motor for moving the transport appliance as well as a power supply appliance of the motor, which comprises an intermediate circuit. The power supply appliance of the motor is fitted between the power source and the electric motor. The transport system further comprises a rectifier of the intermediate circuit power, which is fitted between the intermediate circuit of the power supply appliance of the motor and the supplied load for transmitting intermediate circuit power to the supplied load.Type: GrantFiled: December 18, 2009Date of Patent: November 8, 2011Assignee: Kone CorporationInventor: Pekka Jahkonen
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Patent number: 7960865Abstract: The invention concerns a power control apparatus and a method for supplying power between an electric machine and an energy source. The power control apparatus contains at least two converters comprising a plurality of switches, at least some of which switches belong to a set of switch modules comprising a plurality of switches. In the method of the invention, a first set of switches belonging to at least two different modules and arranged to form a first converter is controlled by a first converter control, and a second set of switches arranged to form a second converter is controlled by a second converter control.Type: GrantFiled: July 24, 2009Date of Patent: June 14, 2011Assignee: Kone CorporationInventor: Pekka Jahkonen
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Patent number: 7905330Abstract: A system and a method for monitoring a safety circuit are presented. The system includes a control appliance and the safety circuit comprises at least one serial circuit of two or more switches. The arrangement system also includes a way of measuring the status of at least one switch, as well as a way of conveying the status information of the switch to the control appliance. The method includes measuring the status information of at least one switch and sending the measured status information to the control appliance.Type: GrantFiled: August 31, 2009Date of Patent: March 15, 2011Assignee: Kone CorporationInventor: Pekka Jahkonen
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Publication number: 20100327795Abstract: A conveyor system includes an electric motor to move a conveyor. A voltage determining device is coupled to an alternating-electricity source that supplies alternating electricity to the conveyor system. A power supply appliance supplies power between the electric motor and the alternating-electricity source. The power supply appliance includes an inverter and an inverter control. The inverter includes a rectifying bridge and a motor bridge. The rectifying bridge input is coupled to the alternating-electricity source and the rectifying bridge output is coupled to the motor bridge input. The motor bridge output is coupled to the electric motor. The inverter control is coupled between the voltage determining device and the motor bridge. The inverter control is responsive to frequency and phase of the determined voltage of the alternating-electricity source to adjust the frequency and phase of the motor bridge output voltage such that the motor bridge output voltage is made to be essentially constant.Type: ApplicationFiled: September 2, 2010Publication date: December 30, 2010Applicant: Kone CorporationInventor: Pekka JAHKONEN
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Publication number: 20100301793Abstract: The invention relates to a frequency converter, which is fitted to supply power between a polyphase alternating electricity source and an electric machine. The frequency converter comprises a network rectifier connected to the alternating electricity source and an inverter connected to the electric machine. The power supply is implemented in the network rectifier and in the inverter with solid-state change-over switches, which change-over switches comprise an antiparallel-connected diode fitted in parallel with the controllable switch. The network rectifier and the inverter are connected to each other with an intermediate circuit, which intermediate circuit is implemented without a passive energy storage.Type: ApplicationFiled: July 13, 2010Publication date: December 2, 2010Applicant: KONE CorporationInventors: Pekka JAHKONEN, Antti Kallioniemi
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Publication number: 20100117566Abstract: The power control of a transport system comprises an electric motor for moving the transport appliance as well as a power supply appliance of the motor, which comprises an intermediate circuit. The power supply appliance of the motor is fitted between the power source and the electric motor. The transport system further comprises a network rectifier, which is fitted between the power source and the intermediate circuit of the power supply appliance of the motor for supplying braking power returning from the motor of the transport appliance to the power source.Type: ApplicationFiled: December 18, 2009Publication date: May 13, 2010Inventor: Pekka JAHKONEN
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Publication number: 20100109596Abstract: The invention relates to a power supply appliance (14) of a transport system, which power supply appliance comprises a power rectifier (1) of the motor, an AC voltage circuit (8), control voltage circuit (13), a power supply circuit (7) of the safety devices (10), an AC/DC transformer (9) fitted between the AC voltage circuit and the control voltage circuit, which is fitted to supply power from the AC voltage circuit (8) to the control voltage circuit (13), as well as a power shaping circuit (4).Type: ApplicationFiled: October 30, 2009Publication date: May 6, 2010Applicant: KONE CORPORATIONInventor: Pekka JAHKONEN
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Publication number: 20100096931Abstract: The power control of a transport system comprises an electric motor for moving the transport appliance as well as a power supply appliance of the motor, which comprises an intermediate circuit. The power supply appliance of the motor is fitted between the power source and the electric motor. The transport system further comprises a rectifier of the intermediate circuit power, which is fitted between the intermediate circuit of the power supply appliance of the motor and the supplied load for transmitting intermediate circuit power to the supplied load.Type: ApplicationFiled: December 18, 2009Publication date: April 22, 2010Inventor: Pekka JAHKONEN
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Patent number: 7681694Abstract: An elevator system and a method for reducing total power in an elevator system are provided. The elevator system includes at least one elevator without counterweight for moving people and/or goods. The elevator without counterweight comprises a power converter unit, an elevator motor, a traction sheave, a set of hoisting ropes and an elevator car. The elevator system also includes means for storing mechanical energy and discharging an energy storage.Type: GrantFiled: June 30, 2008Date of Patent: March 23, 2010Assignee: Kone CorporationInventors: Esko Aulanko, Timo Syrman, Sakari Korvenranta, Pekka Jahkonen
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Publication number: 20100051391Abstract: The present invention presents an arrangement and a method for monitoring a safety circuit. The system comprises a control appliance and the safety circuit comprises at least one serial circuit of two or more switches. The arrangement according to the invention comprises first means for measuring the status of at least one switch, as well as means, in connection with the first means, for conveying the status information of the switch to the control appliance. In the method according to the invention the status information of at least one switch is measured with the first means and the status information of the switch is sent to the control appliance using the first means for conveying the status information of the switch to the control appliance.Type: ApplicationFiled: August 31, 2009Publication date: March 4, 2010Inventor: Pekka JAHKONEN
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Patent number: 7669698Abstract: Elevator system and a method for determining the position information of an elevator car is disclosed. The elevator system includes at least one elevator car, which is fitted to move in an elevator shaft, a control unit for controlling the motions of the elevator car according to calls conveyed to the control unit, and at least one landing call unit fitted in connection with a landing. The landing call unit includes a feature for giving a call and for sending a call to the control unit and a data transfer channel between the landing call unit and the control unit. At least one identifier is fitted in connection with the elevator car. The landing call unit also includes at least one reader fitted to detect the identifier of the elevator car when this is situated in the proximity of the reader.Type: GrantFiled: December 11, 2008Date of Patent: March 2, 2010Assignee: Kone CorporationInventor: Pekka Jahkonen
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Publication number: 20090284079Abstract: The invention concerns a power control apparatus and a method for supplying power between an electric machine and an energy source. The power control apparatus contains at least two converters comprising a plurality of switches, at least some of which switches belong to a set of switch modules comprising a plurality of switches. In the method of the invention, a first set of switches belonging to at least two different modules and arranged to form a first converter is controlled by a first converter control, and a second set of switches arranged to form a second converter is controlled by a second converter control.Type: ApplicationFiled: July 24, 2009Publication date: November 19, 2009Inventor: Pekka JAHKONEN
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Publication number: 20090166134Abstract: The present invention discloses and elevator system and a method for determining the position information of an elevator car. The elevator system according to the invention comprises at least one elevator car (1), which is fitted to move in an elevator shaft (2), a control unit (10) for controlling the motions of the elevator car (1) according to calls conveyed to the control unit (10), and at least one landing call unit (51) fitted in connection with a landing (5), which landing call unit (51) comprises means for giving a call and for sending a call to the control unit (10), and a data transfer channel (110, 120, 130) between the landing call unit (51) and the control unit (10).Type: ApplicationFiled: December 11, 2008Publication date: July 2, 2009Applicant: KONE CorporationInventor: Pekka JAHKONEN
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Publication number: 20080283341Abstract: The invention relates to an elevator system and a method for reducing total power in an elevator system. According to the invention, the elevator system comprises at least one elevator without counterweight for moving people and/or goods, which elevator without counterweight comprises a power converter unit, an elevator motor, a traction sheave, a set of hoisting ropes and an elevator car, and which elevator system comprises means for storing mechanical energy and discharging an energy storage.Type: ApplicationFiled: June 30, 2008Publication date: November 20, 2008Applicant: KONE CORPORATIONInventors: Esko AULANKO, Timo Syrman, Sakari Korvenranta, Pekka Jahkonen