公开(公告)号：US11271507B2

公开(公告)日：2022-03-08

申请号：US17106733

申请日：2020-11-30

Applicant: ABB Schweiz AG

Inventor： Toni Kuikka ,  Juho Salminen ,  Petri Havanto

IPC: H02P23/14 ,  G01R31/34 ,  H02P3/06

Abstract: According to an aspect, there is provided a method for evaluating safety of a speed of a motor controlled by a frequency converter. The method includes, first, measuring first, second and third phase currents of three-phase electric power fed from the frequency converter to the motor and forming first, second and third current measurement pairs based thereon. Then, the speed of the motor is estimated separately based on each measurement pair to produce respective first, second and third estimates for the speed of the motor. A voting logic is applied to the first, second and third estimates for the speed of the motor. A voting logic is applied to the first, second and third estimates. An output of the voting logic is fed to a safety logic controlling at least one safety function of the frequency converter. The output of the voting logic includes an estimate for the speed of the motor and an indication whether or not said final estimate is valid according to the voting logic.

公开(公告)号：US20250076826A1

公开(公告)日：2025-03-06

申请号：US18812479

申请日：2024-08-22

Applicant: ABB Schweiz AG

Inventor： Pekka Alasaari ,  Petri Havanto

IPC: G05B9/02

Abstract: A field of electric logic control devices and electric machines, such as electric motors and electric generators for industrial applications, and more particularly to an input/output facility arrangement in an electric logic control device and to an electric logic control device. The an input/output facility arrangement in an electric logic control device, the arrangement including a digital input/output connection arranged both for safety related input/output and for non-safety related input/output, a non-safety logic controller module, a safety logic controller module or a safety logic interface, and data isolation, wherein the digital output signals from the non-safety logic controller module and from the safety logic controller module or from the optional safety logic controller module are combined with an AND-operator, wherein the safety logic controller module or the optional safety logic controller module is configured to communicate signalling to/from the digital input/output connection, and the digital input/output connection includes an isolation between the non-safety logic controller module and the safety logic controller module or the optional safety logic controller module.

公开(公告)号：US20210167710A1

公开(公告)日：2021-06-03

申请号：US17106733

申请日：2020-11-30

Applicant: ABB Schweiz AG

Inventor： Toni Kuikka ,  Juho Salminen ,  Petri Havanto

IPC: H02P23/14 ,  H02P3/06 ,  G01R31/34

Abstract: According to an aspect, there is provided a method for evaluating safety of a speed of a motor controlled by a frequency converter. The method comprises, first, measuring first, second and third phase currents of three-phase electric power fed from the frequency converter to the motor and forming first, second and third current measurement pairs based thereon. Then, the speed of the motor is estimated separately based on each measurement pair to produce respective first, second and third estimates for the speed of the motor. A voting logic is applied to the first, second and third estimates. An output of the voting logic is fed to a safety logic controlling at least one safety function of the frequency converter. The output of the voting logic comprises an estimate for the speed of the motor and an indication whether or not said final estimate is valid according to the voting logic.

公开(公告)号：US20210159831A1

公开(公告)日：2021-05-27

申请号：US17101011

申请日：2020-11-23

Applicant: ABB Schweiz AG

Inventor： Janne Kallio ,  Petri Havanto

IPC: H02P21/18 ,  G05B9/02 ,  G05B23/02 ,  H02P27/06

Abstract: An electrical drive system including an inverter and an electrical machine supplied by the inverter. A method for controlling the electrical drive system includes: receiving a machine current signal and a machine voltage signal of a machine current supplied to the electrical machine; determining a switching signal based on the machine current signal and controlling the inverter with the switching signal; estimating a first speed estimate from the machine current signal; estimating a second speed estimate from the machine voltage signal; and comparing the first speed estimate and the second speed estimate with each other, and, when the first speed estimate and the second speed estimate deviate from each other more than a threshold, activating a fault reaction of the electrical drive system, which sets the electrical drive system to a predefined state.

公开(公告)号：US11290046B2

公开(公告)日：2022-03-29

申请号：US17101011

申请日：2020-11-23

Applicant: ABB Schweiz AG

Inventor： Janne Kallio ,  Petri Havanto

IPC: H02P21/12 ,  H02P21/18 ,  G05B9/02 ,  G05B23/02 ,  H02P27/06

Abstract: An electrical drive system including an inverter and an electrical machine supplied by the inverter. A method for controlling the electrical drive system includes: receiving a machine current signal and a machine voltage signal of a machine current supplied to the electrical machine; determining a switching signal based on the machine current signal and controlling the inverter with the switching signal; estimating a first speed estimate from the machine current signal; estimating a second speed estimate from the machine voltage signal; and comparing the first speed estimate and the second speed estimate with each other, and, when the first speed estimate and the second speed estimate deviate from each other more than a threshold, activating a fault reaction of the electrical drive system, which sets the electrical drive system to a predefined state.