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
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)
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)
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)
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 |
-
1974
- 1974-10-03 US US05/511,886 patent/US3989991A/en not_active Expired - Lifetime
-
1975
- 1975-09-19 AU AU84997/75A patent/AU503362B2/en not_active Expired
- 1975-09-25 CA CA236,407A patent/CA1096043A/en not_active Expired
- 1975-10-01 BE BE1006920A patent/BE834105A/en not_active IP Right Cessation
- 1975-10-01 BR BR7506356*A patent/BR7506356A/en unknown
- 1975-10-02 ES ES441467A patent/ES441467A1/en not_active Expired
- 1975-10-03 IT IT41705/75A patent/IT1050986B/en active
- 1975-10-03 JP JP11902875A patent/JPS5626239B2/ja not_active Expired
- 1975-10-03 FR FR7530392A patent/FR2287130A1/en not_active Withdrawn
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 |