USB511886I5 - - Google Patents

Info

Publication number
USB511886I5
USB511886I5 US51188674A USB511886I5 US B511886 I5 USB511886 I5 US B511886I5 US 51188674 A US51188674 A US 51188674A US B511886 I5 USB511886 I5 US B511886I5
Authority
US
United States
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.)
Pending
Application number
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 filed Critical
Priority to US05/511,886 priority Critical patent/US3989991A/en
Priority to AU84997/75A priority patent/AU503362B2/en
Priority to CA236,407A priority patent/CA1096043A/en
Priority to BR7506356*A priority patent/BR7506356A/en
Priority to BE1006920A priority patent/BE834105A/en
Priority to ES441467A priority patent/ES441467A1/en
Priority to JP11902875A priority patent/JPS5626239B2/ja
Priority to IT41705/75A priority patent/IT1050986B/en
Priority to FR7530392A priority patent/FR2287130A1/en
Publication of USB511886I5 publication Critical patent/USB511886I5/en
Application granted granted Critical
Publication of US3989991A publication Critical patent/US3989991A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
    • H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
    • H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
    • 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
    • H02P23/00—Arrangements or methods for the control of AC motors characterised by a control method other than vector control
    • H02P23/08—Controlling based on slip frequency, e.g. adding slip frequency and speed proportional frequency

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Ac Motors In General (AREA)
US05/511,886 1974-10-03 1974-10-03 Method and circuit for the derivation of an analog slip frequency signal of an induction motor in a tachometerless motor drive Expired - Lifetime US3989991A (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
US05/511,886 US3989991A (en) 1974-10-03 1974-10-03 Method and circuit for the derivation of an analog slip frequency signal of an induction motor in a tachometerless motor drive
AU84997/75A AU503362B2 (en) 1974-10-03 1975-09-19 Deriving analogue slip frequency signal of induction motor
CA236,407A CA1096043A (en) 1974-10-03 1975-09-25 Motor control system
BE1006920A BE834105A (en) 1974-10-03 1975-10-01 METHOD OF OBTAINING AN ANALOGUE FREQUENCY SLIP SIGNAL OF AN INDUCTION MOTOR, AND MOTOR EXCITATION WITHOUT TACHOMETER IMPLEMENTING THE SAID METHOD
BR7506356*A BR7506356A (en) 1974-10-03 1975-10-01 SLIDING FREQUENCY DETERMINATION PROCESS AND INDICATOR MOTOR DRIVE EQUIPMENT WITH VARIABLE SPEED
ES441467A ES441467A1 (en) 1974-10-03 1975-10-02 Method and circuit for the derivation of an analog slip frequency signal of an induction motor in a tachometerless motor drive
JP11902875A JPS5626239B2 (en) 1974-10-03 1975-10-03
IT41705/75A IT1050986B (en) 1974-10-03 1975-10-03 INDUCTION MOTOR DRIVE EQUIPMENT WITHOUT SPEEDOMETER
FR7530392A FR2287130A1 (en) 1974-10-03 1975-10-03 METHOD FOR OBTAINING AN ANALOGUE FREQUENCY SLIP SIGNAL OF AN INDUCTION MOTOR, AND MOTOR EXCITATION WITHOUT TACHOMETER IMPLEMENTING THE SAID METHOD

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/511,886 US3989991A (en) 1974-10-03 1974-10-03 Method and circuit for the derivation of an analog slip frequency signal of an induction motor in a tachometerless motor drive

Publications (2)

Publication Number Publication Date
USB511886I5 true USB511886I5 (en) 1976-02-03
US3989991A US3989991A (en) 1976-11-02

Family

ID=24036863

Family Applications (1)

Application Number Title Priority Date Filing Date
US05/511,886 Expired - Lifetime US3989991A (en) 1974-10-03 1974-10-03 Method and circuit for the derivation of an analog slip frequency signal of an induction motor in a tachometerless motor drive

Country Status (9)

Country Link
US (1) US3989991A (en)
JP (1) JPS5626239B2 (en)
AU (1) AU503362B2 (en)
BE (1) BE834105A (en)
BR (1) BR7506356A (en)
CA (1) CA1096043A (en)
ES (1) ES441467A1 (en)
FR (1) FR2287130A1 (en)
IT (1) IT1050986B (en)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4088934A (en) * 1976-10-04 1978-05-09 General Electric Company Means for stabilizing an a-c electric motor drive system
JPS5388113A (en) * 1977-01-11 1978-08-03 Toshiba Corp Slip frequency processing device of induction motors
FR2514146A1 (en) * 1981-10-06 1983-04-08 Telemecanique Electrique Slippage determn. for async. motor on polyphase supply - involves measurements of effective impedances at stator terminals, leakage inductance and conductance of motor
JPS58130723U (en) * 1982-02-26 1983-09-03 名古屋化学工業株式会社 Structure of sheet material
JPS58133424U (en) * 1982-03-04 1983-09-08 名古屋化学工業株式会社 Synthetic resin molded product made with short fibers
DE3212439C2 (en) * 1982-04-02 1992-02-20 Robert Prof.Dr.-Ing. 6100 Darmstadt Jötten Method for operating an asynchronous machine fed by fast electrical actuators
FR2535077A1 (en) * 1982-10-26 1984-04-27 K T Control device for an alternating current motor.
EP0175154B1 (en) * 1984-08-21 1991-11-06 Hitachi, Ltd. Method of controlling inverter-driven induction motor
NZ211523A (en) * 1985-03-21 1990-03-27 Univ Auckland Motor speed control by frequency dependent signal
JPS6141398U (en) * 1985-08-01 1986-03-15 東洋電機製造株式会社 Instantaneous slip angle frequency calculation detection circuit
FI77549C (en) * 1986-03-19 1989-03-10 Kone Oy Method and apparatus for providing the voltage reference amplitude at a three-phase inverter supplying a short-circuited asynchronous motor.
JPH0817599B2 (en) * 1988-04-18 1996-02-21 日本オーチス・エレベータ株式会社 Elevator speed controller
SG92598A1 (en) * 1988-04-18 2002-11-19 Otis Elevator Co Speed control system for elevators
ES2022057T3 (en) * 1989-10-16 1994-10-01 Otis Elevator Co CONTROL DEVICE FOR LIFTING INSTALLATION WITHOUT SPEED SENSOR.
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
EP0690556B1 (en) * 1994-06-30 1997-02-12 Siemens Aktiengesellschaft Stop recognizing of inverter controlled motor without speed sensor by restarting
FI112414B (en) * 2001-03-19 2003-11-28 Abb Industry Oy Procedure in conjunction with an inverter
US6856115B2 (en) * 2002-10-31 2005-02-15 A. O. Smith Corporation Method of and apparatus for controlling the operation of an induction motor using a model of the induction motor
US6940240B2 (en) * 2003-05-29 2005-09-06 The Chamberlain Group, Inc. Movable barrier operator multi-technique excess force avoidance apparatus and method
JP5851867B2 (en) * 2012-02-03 2016-02-03 ジェーピーイー株式会社 Induction motor drive device

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3512067A (en) * 1965-03-25 1970-05-12 Mini Ind Constructillor Speed regulation of asynchronous three-phase motors
GB1150606A (en) * 1965-09-30 1969-04-30 Deputy Minister Of The Ministe Method and Circuit for Speed Control of Asynchronous Motors Fed by Static Frequency Convertors
AT289964B (en) * 1968-04-18 1971-05-10 Siemens Ag Electrical device for the formation of actual values in a meshed control arrangement for an in particular converter-fed three-phase asynchronous machine
US3824437A (en) * 1969-08-14 1974-07-16 Siemens Ag Method for controlling asynchronous machines
US3718847A (en) * 1971-05-28 1973-02-27 Gen Electric Adjustable speed polyphase a-c motor drive utilizing an in-phase current signal for motor control
US3775652A (en) * 1972-01-06 1973-11-27 Scragg & Sons Speed controls for electric motors
US3909687A (en) * 1974-03-05 1975-09-30 Westinghouse Electric Corp Flux control system for controlled induction motors

Also Published As

Publication number Publication date
ES441467A1 (en) 1977-07-01
IT1050986B (en) 1981-03-20
BR7506356A (en) 1976-08-17
JPS5162313A (en) 1976-05-29
US3989991A (en) 1976-11-02
FR2287130A1 (en) 1976-04-30
CA1096043A (en) 1981-02-17
AU503362B2 (en) 1979-08-30
BE834105A (en) 1976-04-01
AU8499775A (en) 1977-03-24
JPS5626239B2 (en) 1981-06-17

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