CA2068155A1 - Electric current measurement apparatus for a solid state motor controller - Google Patents

Electric current measurement apparatus for a solid state motor controller

Info

Publication number
CA2068155A1
CA2068155A1 CA2068155A CA2068155A CA2068155A1 CA 2068155 A1 CA2068155 A1 CA 2068155A1 CA 2068155 A CA2068155 A CA 2068155A CA 2068155 A CA2068155 A CA 2068155A CA 2068155 A1 CA2068155 A1 CA 2068155A1
Authority
CA
Canada
Prior art keywords
thyristor switch
motor
current measurement
electric current
solid state
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA2068155A
Other languages
French (fr)
Other versions
CA2068155C (en
Inventor
Peter J. Unsworth
Li Chen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Allen Bradley Co LLC
Original Assignee
Allen Bradley Co LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Allen Bradley Co LLC filed Critical Allen Bradley Co LLC
Publication of CA2068155A1 publication Critical patent/CA2068155A1/en
Application granted granted Critical
Publication of CA2068155C publication Critical patent/CA2068155C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
    • H02P27/02—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using supply voltage with constant frequency and variable amplitude

Abstract

An electric induction motor is coupled to a source of alternating current by a thyristor switch. A control circuit triggers the thyristor switch to create conductive and non-conductive states during each cycle of the alternating current. A circuit senses the voltage across the thyristor switch during a non-conductive state. From that sensed voltage and known characteristics of the motor being controlled, the control circuit derives a measurement of the current flowing through the motor in the conductive state of the thyristor switch. One of two different derivation techniques is used depending upon the length of the non-conductive state. The control circuit includes a means for calibrating the derivation of the current measurement for a specific motor.
CA002068155A 1991-06-10 1992-05-07 Electric current measurement apparatus for a solid state motor controller Expired - Fee Related CA2068155C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US713,428 1991-06-10
US07/713,428 US5153489A (en) 1991-06-10 1991-06-10 Electric current measurement apparatus for a solid state motor controller

Publications (2)

Publication Number Publication Date
CA2068155A1 true CA2068155A1 (en) 1992-12-11
CA2068155C CA2068155C (en) 1997-12-16

Family

ID=24866103

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002068155A Expired - Fee Related CA2068155C (en) 1991-06-10 1992-05-07 Electric current measurement apparatus for a solid state motor controller

Country Status (9)

Country Link
US (1) US5153489A (en)
EP (1) EP0518244B1 (en)
JP (1) JPH05188096A (en)
KR (1) KR100232437B1 (en)
AU (1) AU649816B2 (en)
BR (1) BR9202212A (en)
CA (1) CA2068155C (en)
DE (1) DE69203794T2 (en)
MX (1) MX9202754A (en)

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US5688254A (en) * 1983-01-24 1997-11-18 Icu Medical, Inc. Medical connector
ES2047446B1 (en) * 1992-05-04 1996-10-16 Power Controls Iberica S A APPARATUS AND METHOD OF CONTROL OF START AND STOP OF THREE-PHASE ASYNCHRONOUS MOTORS.
US5661386A (en) * 1993-11-22 1997-08-26 Lockheed Martin Energy Systems, Inc. Method for assessing in-service motor efficiency and in-service motor/load efficiency
US5469045A (en) * 1993-12-07 1995-11-21 Dove; Donald C. High speed power factor controller
CH688842A5 (en) * 1994-03-14 1998-04-15 Landis & Gyr Tech Innovat Means for controlling the motor of the fan of a fan burner.
US5565753A (en) * 1994-04-12 1996-10-15 Allen-Bradley Company, Inc. Method and apparatus for current rebalance in induction motor
DE4413802C2 (en) * 1994-04-20 1996-11-07 Johann Schoenhammer Method and device for controlling the speed of an electric three-phase asynchronous motor
FR2721770B1 (en) * 1994-06-22 1996-09-20 Kohen Cecile Method for controlling a voltage dimmer for supplying an induction motor.
JPH0835713A (en) * 1994-07-26 1996-02-06 Fujitsu General Ltd Method and apparatus for controlling air conditioner
EP0720268A1 (en) * 1994-12-29 1996-07-03 PLUMER (Société Anonyme) Stop control device for single-phase asynchronous motor with capacitor
KR0153103B1 (en) * 1995-05-23 1998-12-15 김태승 Apparatus for input power control of induction motor
US5637976A (en) * 1995-09-29 1997-06-10 Allen-Bradley Company, Inc. Method and apparatus for RMS current measurement in induction motors without a current transformer
US5723966A (en) * 1996-08-23 1998-03-03 Current Technology, Inc. System and method for increasing the efficiency of alternating current induction motors
GB9814373D0 (en) 1998-07-02 1998-09-02 Switched Reluctance Drives Ltd Cleaning apparatus and method with soft-starting
US6184795B1 (en) * 1998-10-02 2001-02-06 Siemens Energy & Automation, Inc. Motor controller having dead ended winding detection capability on a single phase line
US6337803B2 (en) * 1999-06-24 2002-01-08 Nissan Motor Co., Ltd. Power module
GB0011030D0 (en) * 2000-05-09 2000-06-28 Savawatt Uk Ltd Motor energisation control circuit
US6426603B1 (en) * 2000-06-28 2002-07-30 Siemens Energy & Automation Motor controller having automatic permanent single phase wiring detection
US6661194B2 (en) 2002-02-11 2003-12-09 Ford Global Technologies, Llc Real-time estimation of induction machine parameters using sinusoidal voltage signals
US7708714B2 (en) * 2002-02-11 2010-05-04 Baxter International Inc. Dialysis connector with retention and feedback features
US20030210007A1 (en) * 2002-05-08 2003-11-13 Chia-Chang Hsu Input power control device
US7361313B2 (en) * 2003-02-18 2008-04-22 Intel Corporation Methods for uniform metal impregnation into a nanoporous material
US7130170B2 (en) * 2004-02-25 2006-10-31 Siemens Energy & Automation, Inc. System and method for fault contactor detection
US9555180B2 (en) 2008-11-21 2017-01-31 Baxter International Inc. Systems and methods for removing air from the patient's peritoneal cavity
DE102014211647A1 (en) * 2014-06-18 2015-12-24 Robert Bosch Gmbh Device for detecting a switch position
CN104811118A (en) * 2015-04-27 2015-07-29 李保华 Stable electric motor load detection system and detection method
US10296063B2 (en) 2017-03-30 2019-05-21 Oracle International Corporation Integrated circuit current metering using voltage variation detection circuit
CN110999061B (en) * 2017-07-27 2023-06-20 东芝三菱电机产业系统株式会社 AC switch, uninterruptible power supply device provided with same, and voltage sag compensation device
CN109639262B (en) * 2018-12-17 2023-01-31 中冶京诚工程技术有限公司 Method and device for calculating effective value of intermittent current of thyristor

Family Cites Families (9)

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Publication number Priority date Publication date Assignee Title
DE1908726A1 (en) * 1969-02-21 1970-09-10 Bosch Gmbh Robert Arrangement for operating semiconductor switches controllable in two directions of current flow
US3693069A (en) * 1971-11-09 1972-09-19 Gen Electric Gating control for a static switching arrangement with improved conduction angle balancing means
US4482852A (en) * 1981-06-24 1984-11-13 Westinghouse Electric Corp. Motor slip controller for AC motors
CN1021000C (en) * 1989-01-23 1993-05-26 西门子公司 Control fixture for ac-regulating unit
EP0379608B1 (en) * 1989-01-23 1993-03-31 Siemens Aktiengesellschaft Method and device for controlling single or multiphase ac voltage converters
US4870340A (en) * 1989-02-03 1989-09-26 Davis Controls Corporation Method of and apparatus for reducing energy consumption
DE4005679C2 (en) * 1989-03-07 1998-09-24 Siemens Ag Method and device for determining a switch-on time for controlling the switch-on process of a three-phase motor
US4916370A (en) * 1989-04-26 1990-04-10 Allen-Bradley Company, Inc. Motor stoppage apparatus and method using back emf voltage
US4996469A (en) * 1990-03-16 1991-02-26 Allen-Bradley Company, Inc. Electric motor controller with bypass contactor

Also Published As

Publication number Publication date
AU649816B2 (en) 1994-06-02
EP0518244A2 (en) 1992-12-16
EP0518244A3 (en) 1993-04-21
BR9202212A (en) 1993-02-02
MX9202754A (en) 1993-01-01
EP0518244B1 (en) 1995-08-02
AU1612192A (en) 1992-12-17
KR100232437B1 (en) 1999-12-01
DE69203794D1 (en) 1995-09-07
JPH05188096A (en) 1993-07-27
DE69203794T2 (en) 1995-12-14
US5153489A (en) 1992-10-06
CA2068155C (en) 1997-12-16
KR930000959A (en) 1993-01-16

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed