Kone Corporation

Tuukka Kauppinen

Lauri Stolt

Antti Kallioniemi

Juha-Matti Aitamurto

Mikko Puranen

Antti Saarelainen

Riku Lampinen

Asmo Tenhunen

Henri Wenlin

Jussi Huppunen

Risto Jokinen

Antti Koskinen

Jyrki Laaksonheimo

Petri Alkula

Sami Saarela

Esa Putkinen

Mika Olkkonen

Pekka Hallikainen

Timo Vlasov

Mikko Viljanen

Jarkko Saloranta

Mikko Paakkinen

Pekka Hytti

Tomi Petteri Sipilä

Santeri Suoranta

Veli-Matti Virta

Harri Länsiö

Petri Hartikainen

Joakim Modeen

Alessio Calcagno

Toni Kallio

Hilkka Hämäläinen

Matti Hämäläinen

A drive system for driving an electric motor includes a drive control unit and a frequency converter including a speed controller. The drive control unit is configured to: define a speed reference of the electric motor; preset operating parameters of the speed controller to provide a first response time of the speed controller, before a drive of the electric motor is initiated; adjust at least one operating parameter of the speed controller to provide a second response time of the speed controller, after the speed of the electric motor reaches a constant speed, wherein the second response time is slower than the first response time; and readjust the at least one operating parameter of the speed controller to provide the first response time, before a deceleration from the constant speed is initiated. A method is disclosed for controlling the drive system for driving the electric motor.

Drive system and method for controlling a drive system

An electrical converter unit and a method for reducing thermal stress of a power semiconductor switch, such as an IGBT, of an electrical converter unit, the electrical converter unit comprising at least a gate control circuit wherein the electrical converter unit controls an electrical motor. The method comprises determining load and estimating required motor current based on the determined load and/or a predetermined speed profile. The electrical converter unit has at least a first operating state and a second operating state. The second operating state is used if predetermined criteria is fulfilled, the predetermined criteria relating to at least one of the following: estimated required current, measured motor speed, temperature of the power semiconductor switch and/or electrical converter unit, temperature model of the power semiconductor switch and/or electrical converter unit. In the second operating state a lower switching frequency of the power semiconductor switch is used than in the first operating state, and in the second operating state a higher switching speed of the power semiconductor switch is used than in the first operating state.

Method for reducing thermal stress of a power semiconductor switch, an electrical converter unit and an elevator

A method for performing a software update of a people conveyor component in a conveyor system includes downloading a software update from a remote update system based on a request from one or more of the remote update system, at least one conveyor component or the conveyor system such that the software update is downloaded as a background download without affecting an operation of the conveyor system.

People conveyor system and a method for updating software of a people conveyor component in a people conveyor system

An elevator includes an elevator shaft defined by surrounding walls and top and bottom end terminals; an elevator car vertically movable in the elevator shaft; elevator hoisting ropes coupled to the elevator car; an elevator hoisting machine including a traction sheave engaged with the elevator hoisting ropes; a traction monitor configured to determine traction of the hoisting machine; an electromechanical brake; a measuring apparatus adapted to provide speed data and position data of the elevator car; and a safety processor associated with the traction monitor and the measuring apparatus. The safety processor includes an ETLS threshold configured to decrease towards the top and/or bottom end terminal in accordance with the position of the elevator car. The ETSL threshold is adjusted on the basis of the traction of the hoisting machine. The safety processor is configured to determine an elevator car slowdown failure if the speed data meets or exceeds the ETSL threshold.

Elevator

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.

Method for determining rotor position of electric motor, elevator and electrical converter unit

Methods and an apparatuses for determining the movement of a synchronous machine are provided. An apparatus for determining the movement of a synchronous machine includes a determination for at least one electrical magnitude of the synchronous machine; a determination of the position error of the rotor of the synchronous machine, which is fitted to determine the position error of the rotor on the basis of the aforementioned at least one electrical magnitude of the synchronous machine; and also a correction of the movement signal of the incremental sensor, which is fitted to correct the read movement signal of the incremental sensor on the basis of the aforementioned determination of the position error of the rotor of the synchronous machine.

Determination of the movement of a synchronous machine

An elevator system and a method for monitoring the operating condition of an elevator system are provided. In the method, samples are taken of the control signal of the drive device of the elevator, from the series of samples taken a frequency component is determined that is characteristic to the part of the elevator assembly driven with the drive device, and also the operating condition of the part of the elevator assembly is monitored on the basis of the determined frequency component.

Method for monitoring the operating condition of an elevator system on the basis of frequency component

A call-giving device for giving an elevator call for an elevator includes a touch-sensitive display having at least one touch detection area. The call-giving device is configured to: detect a first gesture performed in the at least one touch detection area; register a call to a floor according to a floor marking in response to detecting a touch meeting call-giving criterion on the touch-sensitive display at a point corresponding to the floor marking; and present, on the touch-sensitive display, registration data associated with the registered call, the registration data indicative of registered floor calls that have not yet been served by the elevator.

Touch screen call-giving device and method for giving elevator call

In a method for limiting loading of an elevator assembly, a limit value for a maximum permitted loading is set for one or more parts of the elevator assembly, and a loading of the one or more parts of the elevator assembly is determined. A movement magnitude value of the elevator car in the movement profile of the elevator car is modified to limit the loading of the one or more parts of the elevator assembly if the loading of the one or more parts of the elevator assembly exceeds the limit value for the maximum permitted loading.

Method and elevator assemblies limiting loading of elevators by modifying movement magnitude value

A frequency converter and a method for determining the position of the rotor of an electric machine are provided. The frequency converter includes a load bridge and a control of the load bridge, for supplying electricity between the load bridge and an electric machine connected to the load bridge. The frequency converter includes a determination for at least one electrical parameter of the electric machine, and includes a determination for the position of the rotor of the electric machine. The load bridge is fitted to supply a first alternating electricity excitation signal, which is formed in relation to the electrical angle of the electric machine, to the electric machine. The frequency converter is further fitted to determine the first alternating electricity response signal corresponding to the first alternating electricity excitation signal, and the position of the rotor is determined on the basis of the first alternating electricity response signal.

Determination of the position of the rotor of an electric machine

An adjustment device for controlling the electric drive of an elevator in connection with a voltage reduction of the supplying network is disclosed. The electric drive of an elevator includes an electric motor and a power supply apparatus of for adjusting the supply voltage of the electric motor. The adjustment device includes a device configured to control the power supply apparatus and also a speed regulator for adjusting the speed of the electric motor. The adjustment device is arranged to determine the output voltage of the power supply apparatus of the electric motor in relation to the permitted maximum value of the output voltage, and the adjustment device is arranged to interrupt the operation of the speed regulator but to continue the operation of the power supply apparatus of the electric motor when the output voltage of the power supply apparatus of the electric motor reaches the permitted maximum value.

Adjustment device for controlling electric drive of an elevator, electric drive of an elevator and method for controlling electric drive of an elevator

An arrangement and a method for supervising the operation of a brake includes a controllable electromechanical brake, including a magnetic circuit with at least two ferromagnetic parts fitted to move in relation to each other. A thrusting force is exerted between the ferromagnetic parts via a spring. The brake includes a magnetizing coil fitted into the magnetic circuit, for forming magnetic attraction between the parts of the brake. The arrangement includes a control of the brake, which includes at least one controllable switch, for adjusting the electricity supply of the magnetizing coil. The control of the brake comprises a supervision of the movement of the magnetic circuit of the brake.

Arrangement and method for supervising the operation of a brake

The invention concerns a method and apparatus () for determining an angle () by means of a resolver (). In the method, an excitation signal () of constant frequency is supplied to the resolver (), the resolver response signals () are measured, successive () measurements of each response signal are stored into a sample buffer (), FIR filtering () is computed for the response signal values () present in the sample buffer () at the instant of computation, the computation points () and the set of computation result values () corresponding to these points are stored in memory, at least two sets of values () of computation results are compared to each other and of these the value set Amax () which contains the highest computation result as an unsigned value is selected, and FIR filtering () is repeatedly computed at the computation points () corresponding to value set Amax ().

Apparatus and method for determining resolver angle

A transportation system and a method are provided for backing up the operational state of a transportation system. The transportation system includes a control apparatus for controlling the operation of the transportation system. The control apparatus further includes capacitive energy storage and a power supply backup circuit adapted to maintain power supply from the said energy storage to a storage circuit for a given length of time in connection with an operational anomaly in power supply to the control apparatus.

Transportation system with capacitive energy storage and non-volatile memory for storing the operational state of the transportation system upon detection of the operational anomaly in power

Growing community of inventors

Hyvinkää, Finland

Tuukka Kauppinen