GB1470799A - Compensation loop for a pulse-width modulation device - Google Patents

Compensation loop for a pulse-width modulation device

Info

Publication number
GB1470799A
GB1470799A GB1621674A GB1621674A GB1470799A GB 1470799 A GB1470799 A GB 1470799A GB 1621674 A GB1621674 A GB 1621674A GB 1621674 A GB1621674 A GB 1621674A GB 1470799 A GB1470799 A GB 1470799A
Authority
GB
United Kingdom
Prior art keywords
voltage
width modulation
proportional
transistors
circuit
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
GB1621674A
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric Corp
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 International Standard Electric Corp filed Critical International Standard Electric Corp
Publication of GB1470799A publication Critical patent/GB1470799A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F5/00—Systems for regulating electric variables by detecting deviations in the electric input to the system and thereby controlling a device within the system to obtain a regulated output

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Details Of Television Scanning (AREA)
  • Dc-Dc Converters (AREA)

Abstract

1470799 Automatic voltage regulation INTERNATIONAL STANDARD ELECTRIC CORP 11 April 1974 [11 April 1973] 16216/74 Headings G3R and G3X A regulating arrangement for a pulse width modulation power supply includes a non-linear circuit providing a switching signal with a markspace ratio proportional to the quotient of signals representing the supply output and the input voltage. - As shown in Fig. 6, a D.C.-D.C. converter includes switching transistors Q3, Q4 controlled in a pulse width modulation mode by a known error amplifier circuit ÁA723 receiving a feedback signal Y from a voltage divider 21 connected to the converter output E o . The circuit operates to regulate the output voltage, and the control signals fed to transistors Q3, Q4 are modified to compensate for variations in supply voltage E i . To achieve this, a sawtooth voltage is fed to terminal 3 of the amplifier circuit ÁA723, the amplitude of the sawtooth signal being proportional to a voltage X representing the supply voltage. The frequency of the sawtooth signal is determined by clockpulses H switching field-effect transistors 16, 17 which periodically discharge a capacitor 11. The operation of the circuit is such that the markspace ratio of the switching transistors is proportional to the ratio of the voltages Y and X.
GB1621674A 1973-04-11 1974-04-11 Compensation loop for a pulse-width modulation device Expired GB1470799A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7313047A FR2225879B1 (en) 1973-04-11 1973-04-11

Publications (1)

Publication Number Publication Date
GB1470799A true GB1470799A (en) 1977-04-21

Family

ID=9117775

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1621674A Expired GB1470799A (en) 1973-04-11 1974-04-11 Compensation loop for a pulse-width modulation device

Country Status (3)

Country Link
BE (1) BE818413A (en)
FR (1) FR2225879B1 (en)
GB (1) GB1470799A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2903481A1 (en) * 1979-01-30 1980-07-31 Frako Kondensator Apparate Switching regulator current supply with voltage regulator - uses threshold voltage switching of control pulse FET switch w.r.t supply level, preventing overshoot
GB2156548A (en) * 1984-03-28 1985-10-09 United Technologies Corp Flyback feedforward pulse width modulation regulator
GB2254941A (en) * 1991-04-17 1992-10-21 Smiths Industries Plc Regulated power supply
US5260645A (en) * 1991-04-17 1993-11-09 Smiths Industries Public Limited Company Power supplies

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7415728A (en) * 1974-12-03 1976-06-08 Bell Telephone Mfg IMPROVEMENT OF A PULSE-WIDTH-MODULATED CONVERTER AND LINEAR SAW TOOTH GENERATOR.
NL7507437A (en) * 1975-06-23 1976-12-27 Philips Nv CIRCUIT FOR CONVERTING AN INPUT DC VOLTAGE TO AN OUTPUT DC VOLTAGE.
FR2707021A1 (en) * 1993-06-23 1994-12-30 Valeo Vision Voltage regulating process and device for implementing this process

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2903481A1 (en) * 1979-01-30 1980-07-31 Frako Kondensator Apparate Switching regulator current supply with voltage regulator - uses threshold voltage switching of control pulse FET switch w.r.t supply level, preventing overshoot
GB2156548A (en) * 1984-03-28 1985-10-09 United Technologies Corp Flyback feedforward pulse width modulation regulator
GB2254941A (en) * 1991-04-17 1992-10-21 Smiths Industries Plc Regulated power supply
US5260645A (en) * 1991-04-17 1993-11-09 Smiths Industries Public Limited Company Power supplies
GB2254941B (en) * 1991-04-17 1994-08-10 Smiths Industries Plc Power supplies

Also Published As

Publication number Publication date
FR2225879A1 (en) 1974-11-08
FR2225879B1 (en) 1976-09-10
BE818413A (en) 1975-02-03

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Legal Events

Date Code Title Description
PS Patent sealed
435 Patent endorsed 'licences of right' on the date specified (sect. 35/1949)
PCNP Patent ceased through non-payment of renewal fee