GB1175116A - Improvements in the Transient Performance of Variable Frequency Drives - Google Patents

Improvements in the Transient Performance of Variable Frequency Drives

Info

Publication number
GB1175116A
GB1175116A GB5723867A GB5723867A GB1175116A GB 1175116 A GB1175116 A GB 1175116A GB 5723867 A GB5723867 A GB 5723867A GB 5723867 A GB5723867 A GB 5723867A GB 1175116 A GB1175116 A GB 1175116A
Authority
GB
United Kingdom
Prior art keywords
current
frequency
inverter
oscillator
resistor
Prior art date
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.)
Expired
Application number
GB5723867A
Inventor
Alexander Thomas Wortley
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Brush Electrical Engineering Co Ltd
Original Assignee
Brush Electrical Engineering Co Ltd
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 Brush Electrical Engineering Co Ltd filed Critical Brush Electrical Engineering Co Ltd
Priority to GB5723867A priority Critical patent/GB1175116A/en
Publication of GB1175116A publication Critical patent/GB1175116A/en
Expired 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Ac Motors In General (AREA)
  • Control Of Multiple Motors (AREA)

Abstract

1,175,116. Control of A.C. motors. BRUSH ELECTRICAL ENG. CO. Ltd. 27 Feb., 1968 [16 Dec., 1967], No. 57238/67. Heading H2J. For stable operation of an A.C. motor M which is supplied through a variable frequency inverter P from a D.C. source S, a link-current signal developed across resistor R is applied to potentiometer E associated with differentiating amplifier D. The frequency of operation of the inverter is a linear function of the frequency of pulses derived from an oscillator O whose input current is controlled by transistor T. When the rate of change of link-current becomes positive, a current passes through resistor R 2 to reduce the input to the oscillator and so decrease the frequency of the inverter. When the rate of change of link-current is negative, the output voltage of amplifier D exceeds a bias potential and the current through the resistor R 2 is reversed. This increases the input to the oscillator whereby the frequency of operation of the inverter is increased.
GB5723867A 1967-12-16 1967-12-16 Improvements in the Transient Performance of Variable Frequency Drives Expired GB1175116A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB5723867A GB1175116A (en) 1967-12-16 1967-12-16 Improvements in the Transient Performance of Variable Frequency Drives

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5723867A GB1175116A (en) 1967-12-16 1967-12-16 Improvements in the Transient Performance of Variable Frequency Drives

Publications (1)

Publication Number Publication Date
GB1175116A true GB1175116A (en) 1969-12-23

Family

ID=10478702

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5723867A Expired GB1175116A (en) 1967-12-16 1967-12-16 Improvements in the Transient Performance of Variable Frequency Drives

Country Status (1)

Country Link
GB (1) GB1175116A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2406018A1 (en) * 1977-10-12 1979-05-11 Sole Spa CONTROL DEVICE FOR THE DRUM OF AN AUTOMATIC WASHING MACHINE
DE3347511A1 (en) * 1983-01-03 1984-07-05 General Electric Co., Schenectady, N.Y. AC MACHINE DRIVE SYSTEMS WITH RESONANCE CURRENT SUPPRESSION

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2406018A1 (en) * 1977-10-12 1979-05-11 Sole Spa CONTROL DEVICE FOR THE DRUM OF AN AUTOMATIC WASHING MACHINE
DE3347511A1 (en) * 1983-01-03 1984-07-05 General Electric Co., Schenectady, N.Y. AC MACHINE DRIVE SYSTEMS WITH RESONANCE CURRENT SUPPRESSION

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Legal Events

Date Code Title Description
PS Patent sealed
PLE Entries relating assignments, transmissions, licences in the register of patents
PLNP Patent lapsed through nonpayment of renewal fees