SE7614015L - DEVICE FOR SENDING INFORMATION TRANSMISSION, FREQUENCY MODULATED UNDERWATER SWING - Google Patents

DEVICE FOR SENDING INFORMATION TRANSMISSION, FREQUENCY MODULATED UNDERWATER SWING

Info

Publication number
SE7614015L
SE7614015L SE7614015A SE7614015A SE7614015L SE 7614015 L SE7614015 L SE 7614015L SE 7614015 A SE7614015 A SE 7614015A SE 7614015 A SE7614015 A SE 7614015A SE 7614015 L SE7614015 L SE 7614015L
Authority
SE
Sweden
Prior art keywords
signal
order
phase comparator
oscillator
swing
Prior art date
Application number
SE7614015A
Other languages
Unknown language ( )
Swedish (sv)
Inventor
G M Renggli
Original Assignee
Efa Elektrofunkgeraete
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 Efa Elektrofunkgeraete filed Critical Efa Elektrofunkgeraete
Publication of SE7614015L publication Critical patent/SE7614015L/en

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
    • H02P23/00—Arrangements or methods for the control of AC motors characterised by a control method other than vector control
    • H02P23/18—Controlling the angular speed together with angular position or phase
    • H02P23/186—Controlling the angular speed together with angular position or phase of one shaft by controlling the prime mover

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)

Abstract

In order to rotate an asynchronous motor at various selected speeds and then maintain the speed at the chosen value, the installation comprises a pilot oscillator (9), a phase comparator (7) to which is applied the signal from the pilot oscillator and whose output signal is applied to a control oscillator (12), through a low-pass filter (10), a commutation circuit (2) controlled by the output signal from the control oscillator (12) in order to control the electronic commutation of the asynchronous motor (1), and sensor means (3, 4, 5) associated with the rotor of the motor (1) in order to deliver a signal whose frequency is proportional to the speed of the rotor, this signal being applied to the phase comparator (7), the whole in such a way that the two signals applied simultaneously to the phase comparator (7) are of identical frequencies and that the unit forms a phase-locked loop. This installation can be used in particular for controlling the driving of ultracentrifuges. <IMAGE>
SE7614015A 1975-12-17 1976-12-14 DEVICE FOR SENDING INFORMATION TRANSMISSION, FREQUENCY MODULATED UNDERWATER SWING SE7614015L (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1638475A CH608666A5 (en) 1975-12-17 1975-12-17 Installation for controlling the speed of an asynchronous motor with electronic commutation

Publications (1)

Publication Number Publication Date
SE7614015L true SE7614015L (en) 1977-06-18

Family

ID=4416900

Family Applications (1)

Application Number Title Priority Date Filing Date
SE7614015A SE7614015L (en) 1975-12-17 1976-12-14 DEVICE FOR SENDING INFORMATION TRANSMISSION, FREQUENCY MODULATED UNDERWATER SWING

Country Status (2)

Country Link
CH (1) CH608666A5 (en)
SE (1) SE7614015L (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4564795A (en) * 1981-12-21 1986-01-14 Beckman Instruments, Inc. Motor speed control system

Also Published As

Publication number Publication date
CH608666A5 (en) 1979-01-15

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