Patents by Inventor Jaakko Ollila
Jaakko Ollila 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: 10696523Abstract: A control device for controlling motion of a load of a carrier device is presented. The carrier device can be for example a crane and the load can be carried with a rope connected to a suspension point of the crane. The control device comprises an input interface for receiving an input signal indicative of a target speed of the load, an output interface for submitting an output signal indicative of a reference speed of the suspension point, and a processing system constituting a signal processing path for producing the output signal based on the input signal. The signal processing path comprises at least one finite impulse response filter for suppressing a signal component whose frequency is the natural swinging frequency of the load. Due to the finite impulse response, the temporal length of settling and tail effects caused by the filter is limited and deterministic.Type: GrantFiled: April 17, 2018Date of Patent: June 30, 2020Assignee: Vacon OyInventor: Jaakko Ollila
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Publication number: 20190315601Abstract: A control device for controlling motion of a load of a carrier device is presented. The carrier device can be for example a crane and the load can be carried with a rope connected to a suspension point of the crane. The control device comprises an input interface for receiving an input signal indicative of a target speed of the load, an output interface for submitting an output signal indicative of a reference speed of the suspension point, and a processing system constituting a signal processing path for producing the output signal based on the input signal. The signal processing path comprises at least one finite impulse response filter for suppressing a signal component whose frequency is the natural swinging frequency of the load. Due to the finite impulse response, the temporal length of settling and tail effects caused by the filter is limited and deterministic.Type: ApplicationFiled: April 17, 2018Publication date: October 17, 2019Inventor: Jaakko Ollila
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Patent number: 10270367Abstract: A filtering method and arrangement for a system comprising a regenerative frequency converter and a motor, which regenerative frequency converter has an intermediate DC circuit comprising positive and negative pole and which regenerative frequency converter is connected to a supplying 3-phase mains network via a line filter unit comprising in serial connection a first 3-phase inductor unit with mains side terminals and motor side terminals and a second 3-phase inductor unit, and a 3-phase capacitor unit which comprises phase-specific capacitors which are connected in star connection between the motor side terminals of the first 3-phase inductor unit and a star point, which star point is connected to ground via a fourth capacitor. The filtering arrangement further comprises a common mode inductor unit and a filtering capacitor unit.Type: GrantFiled: January 21, 2016Date of Patent: April 23, 2019Assignee: VACON OYInventors: Nicklas Sodo, Jaakko Ollila, Laakso Martti
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Publication number: 20190028039Abstract: A filtering method and arrangement for a system comprising a regenerative frequency converter and a motor, which regenerative frequency converter has an intermediate DC circuit comprising positive and negative pole and which regenerative frequency converter is connected to a supplying 3-phase mains network via a line filter unit comprising in serial connection a first 3-phase inductor unit with mains side terminals and motor side terminals and a second 3-phase inductor unit, and a 3-phase capacitor unit which comprises phase-specific capacitors which are connected in star connection between the motor side terminals of the first 3-phase inductor unit and a star point, which star point is connected to ground via a fourth capacitor. The filtering arrangement further comprises a common mode inductor unit and a filtering capacitor unit.Type: ApplicationFiled: January 21, 2016Publication date: January 24, 2019Inventors: Nicklas Sodo, Jaakko Ollila, Laakso Martti
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Patent number: 8350506Abstract: Method and apparatus to start a frequency converter equipped with a direct current intermediate circuit, particularly when a permanent magnet motor whose rotor is rotating at the start-up time is connected to it, wherein the frequency converter has a network bridge (10) and load bridge (11), and the load bridge has controllable power semiconductor switches of the upper and lower branch (V1-V6) and parallel connected zero diodes (D1-D6), and a direct current intermediate circuit between them, and the said frequency converter uses a current transducer placed in the direct current intermediate circuit, and the analogue current signal composed by it features samples of the measured output currents, and the diverter switches of the frequency converter's upper branch are controlled using the bootstrap method, wherein start-up is initiated by controlling the controllable power semiconductor switch of the lower branch of at least one output phase to a conductive state for one or several periods of time, preferably ofType: GrantFiled: April 1, 2010Date of Patent: January 8, 2013Assignee: Vacon OyjInventors: Andreas Doktar, Stefan Strandberg, Jaakko Ollila
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Publication number: 20100253256Abstract: Method and apparatus to start a frequency converter equipped with a direct current intermediate circuit, particularly when a permanent magnet motor whose rotor is rotating at the start-up time is connected to it, wherein the frequency converter has a network bridge (10) and load bridge (11), and the load bridge has controllable power semiconductor switches of the upper and lower branch (V1-V6) and parallel connected zero diodes (D1-D6), and a direct current intermediate circuit between them, and the said frequency converter uses a current transducer placed in the direct current intermediate circuit, and the analogue current signal composed by it features samples of the measured output currents, and the diverter switches of the frequency converter's upper branch are controlled using the bootstrap method, wherein start-up is initiated by controlling the controllable power semiconductor switch of the lower branch of at least one output phase to a conductive state for one or several periods of time, preferably ofType: ApplicationFiled: April 1, 2010Publication date: October 7, 2010Applicant: VACON OYJInventors: Andreas DOKTAR, Stefan STRANDBERG, Jaakko OLLILA
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Patent number: 7804288Abstract: A method and a corresponding appliance for measuring the output current of a frequency converter, the frequency converter including a network bridge that can be connected to an AC network, a controllable three-phase load bridge that can be connected to an AC load, and a DC intermediate circuit between them, the DC intermediate circuit including a filter capacitor that includes controllable semiconductor switches in each phase and that are controlled by pulse-width modulation, and in which the currents of the output phases are determined based on measured samples of the current of the filter capacitor of the DC intermediate circuit.Type: GrantFiled: December 12, 2007Date of Patent: September 28, 2010Assignee: Vacon OyjInventors: Jaakko Ollila, Risto Komulainen, Lasse Kortelahti
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Patent number: 7773396Abstract: Method for synchronizing inverter units (INU11, INU12) that are connected in parallel and supply a motor, and a parallel connection arrangement, in which motor is either one winding, which is supplied by inverter units connected in parallel, or a plurality of parallel windings, in which each winding is supplied by its own inverter unit, in which parallel connection one inverter unit functions as a master and the others as slaves, in which method a telecommunications bus is arranged between the units, and in which each inverter unit has its own modulation cycle counter, which are synchronized with each other on the basis of telecommunications messages, preferably serial telecommunications messages.Type: GrantFiled: September 18, 2007Date of Patent: August 10, 2010Assignee: Vacon OyjInventors: Jaakko Ollila, Pasi Kukkonen, Kimmo Rajakangas, Stefan Strandberg
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Patent number: 7742321Abstract: A method and an apparatus for measuring the output currents of a frequency converter, preferably a vector-controlled frequency converter, which comprises a mains bridge (10) connectable to an alternating-current network and a load bridge (11) connectable to an alternating-current load and between these a direct-voltage intermediate circuit, by using current samples obtained from a current measuring sensor in the intermediate voltage circuit, wherein a sample is taken from the signal of the current measuring sensor substantially simultaneously with a point of change of the output voltage vector and upon the lapse of a predetermined delay after the point of change after the switching effects have settled.Type: GrantFiled: June 1, 2007Date of Patent: June 22, 2010Assignee: Vacon OYJInventors: Risto Komulainen, Hannu Saren, Jaakko Ollila
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Patent number: 7593244Abstract: A wiring arrangement and an appliance for limiting the harmonics of a current supplied to a frequency converter from an AC electricity supply network, which frequency converter can be connected to a three-phase AC electricity supply network, in which frequency converter is an uncontrolled network bridge (10) for rectifying the AC voltage of the AC electricity supply network, a DC intermediate circuit, in which is a filtering capacitor (CDC), and a load bridge (11) provided with power semiconductor switches for forming three-phase AC voltage (U, V, W), and which load bridge can be controlled with pulse-width modulation by means of a control unit, and in which DC intermediate circuit is a choke, in which is a choke part (L1, L2) arranged on both the positive and the negative pole, and in which wiring arrangement is an absorption circuit for limiting the harmonics of the current supplied from the AC electricity supply network, in which the absorption circuit is arranged in the DC intermediate voltage circuit,Type: GrantFiled: March 14, 2008Date of Patent: September 22, 2009Assignee: Vacon OYJInventors: Nicklas Södö, Lasse Kortelahti, Jaakko Ollila
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Publication number: 20080309282Abstract: Method of and system for controlling the restart of an A.C. motor drive comprising an A.C. motor (4), a power converter (20, 21, 22) for stepless speed control of the A.C. motor and a load switch (3) arranged between the power converter and the A.C motor, wherein when the power converter (20, 21, 22) detects the output current to go below a predefined limit during the load switch opening it goes to a continuous output sensing mode, and when the output current goes above a predefined limit during the output sensing mode the power converter restarts automatically to a desired operating state.Type: ApplicationFiled: June 3, 2008Publication date: December 18, 2008Inventors: Brian Michael Morris, Jaakko Ollila, Stefan Strandberg, Ulf Backman, Lasse Kortelahti, Ahti Rauma, Pasi Alapeltola
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Publication number: 20080259658Abstract: A wiring arrangement and an appliance for limiting the harmonics of a current supplied to a frequency converter from an AC electricity supply network, which frequency converter can be connected to a three-phase AC electricity supply network, in which frequency converter is an uncontrolled network bridge (10) for rectifying the AC voltage of the AC electricity supply network, a DC intermediate circuit, in which is a filtering capacitor (CDC), and a load bridge (11) provided with power semiconductor switches for forming three-phase AC voltage (U, V, W), and which load bridge can be controlled with pulse-width modulation by means of a control unit, and in which DC intermediate circuit is a choke, in which is a choke part (L1, L2) arranged on both the positive and the negative pole, and in which wiring arrangement is an absorption circuit for limiting the harmonics of the current supplied from the AC electricity supply network, in which the absorption circuit is arranged in the DC intermediate voltage circuit,Type: ApplicationFiled: March 14, 2008Publication date: October 23, 2008Applicant: VACON OYJInventors: Nicklas Sodo, Lasse Kortelahti, Jaakko Ollila
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Publication number: 20080150515Abstract: Method and appliance for measuring the output current of a frequency converter, which frequency converter contains a network bridge (10) that can be connected to an AC network, a controllable three-phase load bridge (11) that can be connected to an AC load, and a DC intermediate circuit between them, which contains a filter capacitor, which load bridge contains controllable semiconductor switches in each phase, which are controlled by pulse-width modulation, and in which the currents of the output phases are determined by means of measured samples of the current of the filter capacitor of the DC intermediate circuit.Type: ApplicationFiled: December 12, 2007Publication date: June 26, 2008Inventors: Jaakko Ollila, Risto Komulainen, Lasse Kortelahti
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Publication number: 20080073978Abstract: Method for synchronizing inverter units (INU11, INU12) that are connected in parallel and supply a motor, and a parallel connection arrangement, in which motor is either one winding, which is supplied by inverter units connected in parallel, or a plurality of parallel windings, in which each winding is supplied by its own inverter unit, in which parallel connection one inverter unit functions as a master and the others as slaves, in which method a telecommunications bus is arranged between the units, and in which each inverter unit has its own modulation cycle counter, which are synchronized with each other on the basis of telecommunications messages, preferably serial telecommunications messages.Type: ApplicationFiled: September 18, 2007Publication date: March 27, 2008Inventors: Jaakko Ollila, Pasi Kukkonen, Kimmo Rajakangas, Stefan Strandberg
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Patent number: 7327588Abstract: A method for the synchronization of parallel-connected inverter units (INU1, INU2) or frequency converters and an inverter apparatus or a frequency converter apparatus wherein the inverter units are provided with inverter-specific modulators, in which method the circulating current between the inverter units is measured, and the modulators are synchronized to each other on the basis of the current measurement data.Type: GrantFiled: February 15, 2005Date of Patent: February 5, 2008Assignee: Vacon OyjInventor: Jaakko Ollila
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Publication number: 20070279958Abstract: A method and an apparatus for measuring the output currents of a frequency converter, preferably a vector-controlled frequency converter, which comprises a mains bridge (10) connectable to an alternating-current network and a load bridge (11) connectable to an alternating-current load and between these a direct-voltage intermediate circuit, by using current samples obtained from a current measuring sensor in the intermediate voltage circuit, wherein a sample is taken from the signal of the current measuring sensor substantially simultaneously with a point of change of the output voltage vector and upon the lapse of a predetermined delay after the point of change after the switching effects have settled.Type: ApplicationFiled: June 1, 2007Publication date: December 6, 2007Inventors: Risto Komulainen, Hannu Saren, Jaakko Ollila
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Publication number: 20050179419Abstract: A method for the synchronization of parallel-connected inverter units (INU1, INU2) or frequency converters and an inverter apparatus or a frequency converter apparatus wherein the inverter units are provided with inverter-specific modulators, in which method the circulating current between the inverter units is measured, and the modulators are synchronized to each other on the basis of the current measurement data.Type: ApplicationFiled: February 15, 2005Publication date: August 18, 2005Applicant: VACON OYJInventor: Jaakko Ollila
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Patent number: 6807074Abstract: An inverter control unit having a bridge circuit provided with controllable semiconductor switches in upper and lower circuit arms, which bridge circuit converts a direct voltage to be fed to the inverter into an alternating voltage of variable frequency and amplitude, said control unit controlling the semiconductor switches by pulse-width modulation (PWM) to generate an inverter output voltage, and said control unit comprising a first control section (21) at ground potential and a second control section (22) at the potential of the semiconductor switches, galvanically isolated channels being provided between said sections for serial transmission of control data from the first control section to the second control section and of feedback data from the second control section to the first control section.Type: GrantFiled: May 16, 2003Date of Patent: October 19, 2004Assignee: Vacon OyjInventors: Jaakko Ollila, Risto Komulainen
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Publication number: 20030214827Abstract: An inverter control unit having a bridge circuit provided with controllable semiconductor switches in upper and lower circuit arms, which bridge circuit converts a direct voltage to be fed to the inverter into an alternating voltage of variable frequency and amplitude, said control unit controlling the semiconductor switches by pulse-width modulation (PWM) to generate an inverter output voltage, and said control unit comprising a first control section (21) at ground potential and a second control section (22) at the potential of the semiconductor switches, galvanically isolated channels being provided between said sections for serial transmission of control data from the first control section to the second control section and of feedback data from the second control section to the first control section.Type: ApplicationFiled: May 16, 2003Publication date: November 20, 2003Inventors: Jaakko Ollila, Risto Komulainen
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Patent number: 5140514Abstract: Procedure for regulating the d.c. voltage of a pulse-width modulated rectifier bridge controlled by self-commutated semiconductor components and provided with filtering coils, in which procedure the phase voltages of the supplying three-phase mains and the d.c. voltage of the rectifier are measured. The modulation references needed for the pulse-width modulation are produced using pure sine and cosine curves synchronized with the mains voltages, with spatial vectors formed from them or with components of such vectors, by means of a phase-locked loop. The regulation is effected in a coordinate system tied to the spatial vector of the mains voltages.Type: GrantFiled: May 3, 1991Date of Patent: August 18, 1992Assignee: Kone Elevator GmbHInventors: Heikki Tuusa, Jaakko Ollila