SE8005040L - SPEED SWITCH FOR SMALL ELECTRIC SINGLE ENGINE - Google Patents

SPEED SWITCH FOR SMALL ELECTRIC SINGLE ENGINE

Info

Publication number
SE8005040L
SE8005040L SE8005040A SE8005040A SE8005040L SE 8005040 L SE8005040 L SE 8005040L SE 8005040 A SE8005040 A SE 8005040A SE 8005040 A SE8005040 A SE 8005040A SE 8005040 L SE8005040 L SE 8005040L
Authority
SE
Sweden
Prior art keywords
motor
voltage source
calculator
pulse
computes
Prior art date
Application number
SE8005040A
Other languages
Swedish (sv)
Other versions
SE450443B (en
Inventor
K Uddin
Original Assignee
Eluw Electronic Ab
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 Eluw Electronic Ab filed Critical Eluw Electronic Ab
Priority to SE8005040A priority Critical patent/SE450443B/en
Publication of SE8005040L publication Critical patent/SE8005040L/en
Publication of SE450443B publication Critical patent/SE450443B/en

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01PMEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42Devices characterised by the use of electric or magnetic means
    • G01P3/44Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/48Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00Emergency 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
    • H02H7/08Emergency 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
    • H02H7/093Emergency 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 increase beyond, or decrease below, a predetermined level of rotational speed

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
  • Control Of Stepping Motors (AREA)
  • Control Of Ac Motors In General (AREA)

Abstract

The appts. comprises a calculating and alarm circuit which is fitted between the motor voltage source and the motor itself. It has a first pulse calculator controlled by the voltage source frequency, which computes the number of periods in the voltage source. The pulse calculator controls a current adjuster in the motor's supply cable so that it interrupts feed on a regular basis and for short periods within a required time interval. A second such calculator computes the number of induced impulses on the motor feed cable based on the motor's rotation within the above time interval, and activates an alarm circuit when the pulse count exceeds a specific limit. (Provisional Basic advised week E08)
SE8005040A 1980-07-09 1980-07-09 Primary pulse calculator for AC motor rotation surveillance SE450443B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SE8005040A SE450443B (en) 1980-07-09 1980-07-09 Primary pulse calculator for AC motor rotation surveillance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE8005040A SE450443B (en) 1980-07-09 1980-07-09 Primary pulse calculator for AC motor rotation surveillance

Publications (2)

Publication Number Publication Date
SE8005040L true SE8005040L (en) 1982-01-10
SE450443B SE450443B (en) 1987-06-22

Family

ID=20341402

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8005040A SE450443B (en) 1980-07-09 1980-07-09 Primary pulse calculator for AC motor rotation surveillance

Country Status (1)

Country Link
SE (1) SE450443B (en)

Also Published As

Publication number Publication date
SE450443B (en) 1987-06-22

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