CA2061960A1 - Electric motor control apparatus and method - Google Patents

Electric motor control apparatus and method

Info

Publication number
CA2061960A1
CA2061960A1 CA002061960A CA2061960A CA2061960A1 CA 2061960 A1 CA2061960 A1 CA 2061960A1 CA 002061960 A CA002061960 A CA 002061960A CA 2061960 A CA2061960 A CA 2061960A CA 2061960 A1 CA2061960 A1 CA 2061960A1
Authority
CA
Canada
Prior art keywords
motor
samples
speed
polarity
winding
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
CA002061960A
Other languages
French (fr)
Other versions
CA2061960C (en
Inventor
Robert J. Delange
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 CA2061960A1 publication Critical patent/CA2061960A1/en
Application granted granted Critical
Publication of CA2061960C publication Critical patent/CA2061960C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • H02P3/00—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters
    • H02P3/06—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter
    • H02P3/18—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter for stopping or slowing an ac motor
    • 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 connected by a switch means to a source of three-phase alternating electricity. The speed of the motor is determined by detecting when the source voltage a zero crossing and thereafter sensing the polarity of the back emf voltage induced in each winding of the motor when the switch means is non-conductive. After several zero crossings a set of polarity samples has been produced from each winding.
The motor speed is determined by detected the occurrence of a predefined relationship among samples in each set. For example, the speed is in the range of fifty to about thirty-eight percent of full synchronous speed when three consecutive samples from one winding all have the same polarity. The occurrence of the predefined relationship among back emf polarity samples can be used to control the braking of the motor.
CA002061960A 1991-05-06 1992-02-27 Electric motor control apparatus and method Expired - Fee Related CA2061960C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/695,870 US5187419A (en) 1991-05-06 1991-05-06 Electric motor control apparatus and method
US695,870 1991-05-06

Publications (2)

Publication Number Publication Date
CA2061960A1 true CA2061960A1 (en) 1992-11-07
CA2061960C CA2061960C (en) 2002-07-16

Family

ID=24794769

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002061960A Expired - Fee Related CA2061960C (en) 1991-05-06 1992-02-27 Electric motor control apparatus and method

Country Status (8)

Country Link
US (1) US5187419A (en)
EP (1) EP0512372B1 (en)
JP (1) JPH05184175A (en)
KR (1) KR920022637A (en)
BR (1) BR9201450A (en)
CA (1) CA2061960C (en)
DE (1) DE69223677T2 (en)
MX (1) MX9202044A (en)

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US6369534B1 (en) * 2000-04-26 2002-04-09 Stmicroelectronics, Inc. Circuit and method for detecting backward spin of a spindle motor for a disk drive
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US6437525B1 (en) 2000-08-18 2002-08-20 Stmicroelectronics, Inc. Method and apparatus for spinning a multiphase motor for a disk drive system from an inactive state
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US6541928B2 (en) 2000-12-29 2003-04-01 Stmicroelectronics, Inc. Adaptive system and method for spinning a polyphase disk drive motor from a stationary position
US7164238B2 (en) * 2001-11-14 2007-01-16 Astral Communications, Inc. Energy savings device and method for a resistive and/or an inductive load and/or a capacitive load
GB0214841D0 (en) * 2002-06-27 2002-08-07 Shlaimoun Zia Voltage capping device
JP3955287B2 (en) * 2003-04-03 2007-08-08 松下電器産業株式会社 Inverter control device for motor drive and air conditioner
IL158176A0 (en) * 2003-09-30 2004-03-28 A V Mapa Ltd A method and a device for controlling output power of ac motor
KR100690652B1 (en) * 2004-11-23 2007-03-09 엘지전자 주식회사 Fan motor velocity valiable apparatus for airconditioner
US7345449B2 (en) * 2005-08-29 2008-03-18 Benshaw, Inc. Method of rotating a polyphase motor at less than rated speed
US7227326B1 (en) * 2006-04-24 2007-06-05 Rockwell Automation Technologies, Inc. System and method for transient-based motor speed estimation with transient excitation
WO2008148160A1 (en) * 2007-06-08 2008-12-11 Itw Industrial Packaging Australia Pty Ltd Torque control for ac motors
US8138709B2 (en) * 2007-08-31 2012-03-20 Rockwell Automation Technologies, Inc. Control method and system
US8203304B2 (en) * 2007-08-31 2012-06-19 Rockwell Automation Technologies, Inc. Control method and system with feedback indicative of load flux
GB201006391D0 (en) 2010-04-16 2010-06-02 Dyson Technology Ltd Control of a brushless permanent-magnet motor
GB201006387D0 (en) * 2010-04-16 2010-06-02 Dyson Technology Ltd Control of a brushless motor
GB201006396D0 (en) 2010-04-16 2010-06-02 Dyson Technology Ltd Control of a brushless motor
GB201006392D0 (en) 2010-04-16 2010-06-02 Dyson Technology Ltd Controller for a brushless motor
GB201006386D0 (en) 2010-04-16 2010-06-02 Dyson Technology Ltd Control of a brushless motor
GB201006397D0 (en) 2010-04-16 2010-06-02 Dyson Technology Ltd Control of a brushless motor
GB201006384D0 (en) * 2010-04-16 2010-06-02 Dyson Technology Ltd Control of a brushless motor
GB201006395D0 (en) 2010-04-16 2010-06-02 Dyson Technology Ltd Control of a brushless motor
GB201006398D0 (en) 2010-04-16 2010-06-02 Dyson Technology Ltd Control of a brushless motor
GB201006390D0 (en) 2010-04-16 2010-06-02 Dyson Technology Ltd Control of a brushless motor
GB201006388D0 (en) 2010-04-16 2010-06-02 Dyson Technology Ltd Control of brushless motor
GB2484289B (en) 2010-10-04 2013-11-20 Dyson Technology Ltd Control of an electrical machine
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DE102011085853A1 (en) * 2011-11-07 2013-05-08 Siemens Aktiengesellschaft Method and arrangement for operating synchronous motors
DE102011085859A1 (en) * 2011-11-07 2013-05-08 Siemens Aktiengesellschaft Method and arrangement for operating synchronous motors
CN105099329B (en) 2014-05-19 2018-04-06 罗克韦尔自动化技术公司 Quasi- variable frequency motor controller
US10056851B2 (en) * 2014-05-30 2018-08-21 Eaton Corporation System and method for induction motor speed estimation using a soft starter system
WO2017106593A1 (en) * 2015-12-17 2017-06-22 Venturedyne, Ltd. Environmental sensor and method of operating the same
US10557472B2 (en) 2015-12-17 2020-02-11 Venturedyne, Ltd. Environmental sensor and method of operating the same
US9857285B2 (en) 2015-12-17 2018-01-02 Venturedyne, Ltd. Environmental sensor and method of operating the same
US9983596B2 (en) 2015-12-17 2018-05-29 Venturedyne, Ltd. Environmental sensor and method of operating the same
CN106059411B (en) * 2016-07-28 2018-10-30 广东威灵电机制造有限公司 Recognition methods, device and the motor of electric motor starting state
DE102016214419A1 (en) * 2016-08-04 2018-02-08 Siemens Aktiengesellschaft Soft starter, operating method and switching system
DE112017008092A5 (en) * 2017-09-25 2020-07-09 Siemens Aktiengesellschaft Braking method for an electric motor
US10756659B1 (en) * 2019-04-30 2020-08-25 Rockwell Automation Technologies, Inc. Counter electromotive force estimation
US11128240B1 (en) 2020-08-13 2021-09-21 Eaton Intelligent Power Limited Reduced voltage soft starter apparatus and methods using current-controlled transitions
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Also Published As

Publication number Publication date
EP0512372A3 (en) 1994-07-06
EP0512372A2 (en) 1992-11-11
DE69223677D1 (en) 1998-02-05
MX9202044A (en) 1992-11-01
JPH05184175A (en) 1993-07-23
EP0512372B1 (en) 1997-12-29
US5187419A (en) 1993-02-16
DE69223677T2 (en) 1998-07-30
KR920022637A (en) 1992-12-19
CA2061960C (en) 2002-07-16
BR9201450A (en) 1992-12-15

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