BE893636A - PROCESS FOR THE PREPARATION OF FURANS AND PHENANTHRENES - Google Patents

PROCESS FOR THE PREPARATION OF FURANS AND PHENANTHRENES

Info

Publication number
BE893636A
BE893636A BE0/208437A BE208437A BE893636A BE 893636 A BE893636 A BE 893636A BE 0/208437 A BE0/208437 A BE 0/208437A BE 208437 A BE208437 A BE 208437A BE 893636 A BE893636 A BE 893636A
Authority
BE
Belgium
Prior art keywords
phenanthrenes
furans
preparation
Prior art date
Application number
BE0/208437A
Other languages
French (fr)
Original Assignee
Bayer Ag
Degussa
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 Bayer Ag, Degussa filed Critical Bayer Ag
Publication of BE893636A publication Critical patent/BE893636A/en

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
    • H02H7/0833—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors for electric motors with control arrangements
    • 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
    • H02P27/026—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 whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
    • H02H7/085—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load
    • H02H7/0856—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load characterised by the protection measure taken
    • H02H7/0858—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load characterised by the protection measure taken by reversing, cycling or reducing the power supply to the motor

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Ac Motors In General (AREA)
  • Control Of Direct Current Motors (AREA)
BE0/208437A 1981-06-26 1982-06-24 PROCESS FOR THE PREPARATION OF FURANS AND PHENANTHRENES BE893636A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19813125157 DE3125157A1 (en) 1981-06-26 1981-06-26 Rotation-speed regulating circuit for a motor

Publications (1)

Publication Number Publication Date
BE893636A true BE893636A (en) 1982-12-27

Family

ID=6135452

Family Applications (1)

Application Number Title Priority Date Filing Date
BE0/208437A BE893636A (en) 1981-06-26 1982-06-24 PROCESS FOR THE PREPARATION OF FURANS AND PHENANTHRENES

Country Status (2)

Country Link
BE (1) BE893636A (en)
DE (1) DE3125157A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58172927A (en) * 1982-04-02 1983-10-11 株式会社日立製作所 Overload protecting device
US5268623A (en) * 1985-03-05 1993-12-07 Papst Licensing Gmbh D.c. motor with a current-limiting arrangement
DE3607014B4 (en) * 1985-03-05 2007-03-15 Papst Licensing Gmbh & Co. Kg Circuit arrangement for the pulse width modulated control of a DC motor
DE3632671A1 (en) * 1985-11-13 1987-05-21 Heidelberger Druckmasch Ag DEVICE FOR TEMPERATURE MONITORING OF A DC CURRENT SHUTTER MOTOR FOR DRIVING ROTARY PRINTING MACHINES
US4707646A (en) * 1986-05-29 1987-11-17 Carrier Corporation Method of limiting motor power output
DE3914312A1 (en) * 1989-04-29 1990-10-31 Telefunken Electronic Gmbh CIRCUIT TO DETECT THE OVERLOAD OF A MOTOR
DE10216836B4 (en) * 2002-04-16 2005-09-22 Metabowerke Gmbh Electric power tool

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1262415B (en) * 1959-04-29 1968-03-07 Licentia Gmbh Arrangement for monitoring a predetermined product value proportional to the torque of a direct current machine
CH374411A (en) * 1961-06-16 1964-01-15 Schneider Karl Method for the automatic protection of a direct current machine against an overload and installation for its implementation
US3343055A (en) * 1965-01-13 1967-09-19 Fincor Inc Adjustable motor speed and torque limit control circuit
GB1129178A (en) * 1966-07-06 1968-10-02 Baldwin & Francis Holdings Ltd Improvements relating to overload protection in electric supply systems
DE1588600B2 (en) * 1967-12-04 1971-11-18 Niemann, Gerhard, 4524 Neuenkirchen CIRCUIT ARRANGEMENT FOR THE SELF-ACTING OVERLOAD PROTECTION OF AN ELECTRIC MOTOR
US3633073A (en) * 1969-12-05 1972-01-04 Borg Warner Overload and overcurrent regulation and protection system
US3775651A (en) * 1971-12-17 1973-11-27 Gen Electric Power system overcurrent protection means utilizing voltage adjustment
DE2354846A1 (en) * 1973-11-02 1975-05-07 Bosch Gmbh Robert SWITCH ARRANGEMENT FOR A CONSUMER, IN PARTICULAR A DC MOTOR
DE2415630A1 (en) * 1974-03-30 1975-10-02 Licentia Gmbh Phase control cct. with triac and RC element - has diode bridge shunt with transistor in second diagonal controlled by constant current source
DE2618414A1 (en) * 1976-04-24 1977-11-03 Licentia Gmbh Monolithically integrated phase gating control - is wired to capacitor for threshold value switching and pulse generation

Also Published As

Publication number Publication date
DE3125157A1 (en) 1983-01-13
DE3125157C2 (en) 1987-10-22

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Legal Events

Date Code Title Description
RE Patent lapsed

Owner name: DEGUSSA A.G.

Effective date: 19850624

Owner name: BAYER A.G.

Effective date: 19850624