GB588038A - Improvements in control systems for electric motors - Google Patents

Improvements in control systems for electric motors

Info

Publication number
GB588038A
GB588038A GB1496444A GB1496444A GB588038A GB 588038 A GB588038 A GB 588038A GB 1496444 A GB1496444 A GB 1496444A GB 1496444 A GB1496444 A GB 1496444A GB 588038 A GB588038 A GB 588038A
Authority
GB
United Kingdom
Prior art keywords
signal
frequency
phase
modulator
amplitude
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
GB1496444A
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.)
FURZEHILL LAB Ltd
S Smith and Sons Ltd
S Smith and Sons England Ltd
Original Assignee
FURZEHILL LAB Ltd
S Smith and Sons Ltd
S Smith and Sons England 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 FURZEHILL LAB Ltd, S Smith and Sons Ltd, S Smith and Sons England Ltd filed Critical FURZEHILL LAB Ltd
Priority to GB1496444A priority Critical patent/GB588038A/en
Publication of GB588038A publication Critical patent/GB588038A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B11/00—Automatic controllers
    • G05B11/01—Automatic controllers electric
    • G05B11/011—Automatic controllers electric details of the correcting means

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Multiple Motors (AREA)

Abstract

588,038. Electric follow-up systems. MILSOM, F. R., FURZEHILL LABORATORIES, Ltd., and SMITH & SONS (ENGLAND), Ltd., S. Aug. 4, 1944, No. 14964. [Class 40 (i)] [Also in Group XXXVII] A system for controlling a motor 9 in accordance with amplitude and phase variations of an A.C. signal, in order, for example, to vary an impedance in an A.C. bridge circuit, comprises a modulator 3, e.g. a ring modulator, arranged to modulate the signal of signal frequency, applied at 1, with a reference voltage of signal frequency but of constant amplitude and fixed phase applied at 2, thereby producing a signal of zero frequency, i.e. D.C., which is applied at 6 to a second modulator 5 and there modulated with a reference A.C. voltage of motor frequency and fixed amplitude applied at 7 to produce a signal applied over line 8 to one phase winding 10 of the two-phase induction motor 9. The other phase winding 11 is supplied with oscillations in quadrature with the reference oscillations applied at 7. A signal component proportional to the differential or integral of the original signal may be introduced into the intermediate stage of zero frequency. Specification 568,554, [Group XXXVI], is referred to.
GB1496444A 1944-08-04 1944-08-04 Improvements in control systems for electric motors Expired GB588038A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1496444A GB588038A (en) 1944-08-04 1944-08-04 Improvements in control systems for electric motors

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1496444A GB588038A (en) 1944-08-04 1944-08-04 Improvements in control systems for electric motors

Publications (1)

Publication Number Publication Date
GB588038A true GB588038A (en) 1947-05-13

Family

ID=10050661

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1496444A Expired GB588038A (en) 1944-08-04 1944-08-04 Improvements in control systems for electric motors

Country Status (1)

Country Link
GB (1) GB588038A (en)

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