GB2579932A - A method of maintaining an oscillating voltage at optimum resonance - Google Patents

A method of maintaining an oscillating voltage at optimum resonance Download PDF

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Publication number
GB2579932A
GB2579932A GB2002626.6A GB202002626A GB2579932A GB 2579932 A GB2579932 A GB 2579932A GB 202002626 A GB202002626 A GB 202002626A GB 2579932 A GB2579932 A GB 2579932A
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United Kingdom
Prior art keywords
voltage
peak
desired value
less
switch
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Application number
GB2002626.6A
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GB2579932B (en
GB202002626D0 (en
Inventor
John Peto Raymond
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.)
Quepal Ltd
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Quepal Ltd
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Publication of GB2579932A publication Critical patent/GB2579932A/en
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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
    • 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
    • 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
    • H02M3/158—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 including plural semiconductor devices as final control devices for a single load
    • H02M3/1588—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 including plural semiconductor devices as final control devices for a single load comprising at least one synchronous rectifier element
    • 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
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0048—Circuits or arrangements for reducing losses
    • H02M1/0054—Transistor switching losses
    • H02M1/0058—Transistor switching losses by employing soft switching techniques, i.e. commutation of transistors when applied voltage is zero or when current flow is zero
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)
  • Inverter Devices (AREA)

Abstract

A system for ensuring an oscillating voltage is maintained at optimum resonance comprises: a voltage sensor that senses a peak voltage in an oscillating voltage waveform. A peak determining means determines if the peak is less than a desired value and in the event that the peak is less than the desired value, the peak determining means applies a shortfall voltage to the oscillating voltage, which is the difference between the peak voltage and the desired voltage so as to sustain resonance of the oscillating voltage.

Claims (19)

  1. Claims
    1 . A system (Fig 13A) for ensuring an oscillating voltage is maintained at optimum resonance comprising: a voltage sensor that senses a peak voltage in an oscillating voltage waveform; a peak determining means determines if the peak voltage is less than a desired value and in the event that the peak voltage is less than the desired value, the peak determining means applies a shortfall voltage to the oscillating voltage, which is the difference between the peak voltage and the desired voltage, so as to maintain resonance of the oscillating voltage.
  2. 2. A system according to claim 1 wherein the peak determining means is a processor, the voltage sensor provides a peak voltage signal to the processor; and in the event that the peak voltage signal is less than the desired value, the processor switches on a power switching device which applies the shortfall voltage to the oscillating voltage.
  3. 3. A system as claimed in claim 1 or 2 includes a protection diode (D2) which in use is forward biased by a bias current, the bias current provides a signal to a feedback controller in order to determine whether the protection diode (D2) is forward biased.
  4. 4. A system according to any preceding claim wherein the peak determining means determines if the peak voltage is less than a desired value and indicates an amount of current to be injected depending on a shortfall between the peak of the resonating voltage and a maximum rail voltage.
  5. 5. A power conversion device includes: the system according to any preceding claim.
  6. 6. A power conversion device according to claim 5 has a voltage converter which is switched on at a pre-set ratio of input voltage to output voltage.
  7. 7. A power conversion device according to claim 6 has a voltage converter which is switched on when a ratio of input to output voltage is less than 0.5 and is operative to store a pre-set negative charge in a coil so as to bias an inductor and prevent the inductor from exceeding a maximum voltage output when switched/discharging.
  8. 8. A power conversion device according to claim 6 or 7 has a pre-charging circuit that supplies negative charge to an inductor coil when a ratio of input to output voltage is less than a specified value.
  9. 9. A power conversion device according to any preceding claim wherein a current is obtained from an inductor and used to derive the shortfall voltage.
  10. 10. A method of ensuring an oscillating voltage (Figure 17A) is maintained at optimum resonance comprising the steps of: sensing a peak in an oscillating voltage waveform; determining if the peak is less than a desired value (Vin); and in the event that the peak is less than the desired value (VIN) applying an additional input voltage (VADD) SO that the oscillating voltage reaches the desired value (Vin).
  11. 1 1 . A method according to claim 9 wherein the oscillating voltage is maintained at the optimum resonance in a switched mode power supply.
  12. 12. A method according to claim 10 includes an additional step of: delaying application of a switching transition of the switch mode power supply by an incremental time delay (TEXTEND) for a subsequent voltage waveform in order that the subsequent voltage waveform reaches the desired value (Vin).
  13. 13. A method according to claim 1 1 wherein the incremental time delay (TEXTEND) is derived from a priori knowledge of the additional input voltage (VADD) .
  14. 14. A method according to any of claims 9 to 12 comprising the steps of: inputting a voltage signal representative of the peak voltage to a microprocessor; the microprocessor determining if the peak voltage signal is less than the desired value (VIN) and in the event that the peak voltage signal is less than the desired value (VIN), the microprocessor is operative to switch on a power switching device for applying an additional input voltage (VADD) to the oscillating voltage at an instant determined by the microprocessor operating under software to derive values for (VADD) and/or (TEXTEND) from: a 'look-up' table and/or from calculation using equations modelling a damped L-C network.
  15. 15. A method according to claim 13 comprising the steps of varying the value of (TEXTEND) in order to achieve optimum resonance.
  16. 16. A method according to any of claims 9 to 14 comprising the steps of: modifying a circuit (Fig 26) which includes a switch mode power supply in order to generate an output voltage (V0UT) at a desired value; receiving an input voltage; commencing start-up (Fig 31 and Fig 32) during a first switching phase by soft-starting a first switch (Q1 ); during a second switching phase (Fig 31 ) maintaining switch (Q1 ) on so that a current (k) passing through inductor (L) reaches a predetermined maximum; during a third switching phase turning off the first switch (Q1 ); during a fourth switching phase turning on a second switch (Q2) in order to commutate stored energy from inductor (L) to an output terminal (Vout) ; and awaiting the combined events of current (k) reaching zero and expiry of the time delay (TEXTEND) in order to switch off switch (Q2) before commencing a fifth switching phase; and at the end of the fifth switching phase turning on the first switch (Q1 ); and repeating the second, third, fourth and fifth switching phases in sequence in order to maintain optimum resonance.
  17. 17. A method according to any of claims 9 to 1 5 comprising the steps of inputting a voltage signal representative of the peak voltage to a control circuit; the control circuit performing a voltage comparison between the peak voltage signal and the desired value (Vin) and in the event that the peak voltage signal is less than the desired value (Vin), a microprocessor is operative to switch on a power switching device for applying an additional input voltage (VADD) to the oscillating voltage at an instant determined by the microprocessor operating under software to derive values for (VADD) and/or (TEXTEND) from: a 'look-up' table and/or from calculation using equations modelling a damped L-C network.
  18. 18. A method according to any of claims 9 to 1 7 includes the step of measuring the current from an inductor in order to derive the shortfall voltage.
  19. 19. A method according to any of claims 9 to 18 includes the steps: of detecting an over shoot or shoot through event and feeding back a signal to reduce or damp a resonating voltage.
GB2002626.6A 2017-07-25 2018-07-24 A method of maintaining an oscillating voltage at optimum resonance Active GB2579932B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1711937.1A GB2565273A (en) 2017-07-25 2017-07-25 A method of maintaining an oscillating voltage at optimum resonance
PCT/IB2018/055512 WO2019021186A1 (en) 2017-07-25 2018-07-24 A method of maintaining an oscillating voltage at optimum resonance

Publications (3)

Publication Number Publication Date
GB202002626D0 GB202002626D0 (en) 2020-04-08
GB2579932A true GB2579932A (en) 2020-07-08
GB2579932B GB2579932B (en) 2022-10-19

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GB1711937.1A Withdrawn GB2565273A (en) 2017-07-25 2017-07-25 A method of maintaining an oscillating voltage at optimum resonance
GB2002626.6A Active GB2579932B (en) 2017-07-25 2018-07-24 A method of maintaining an oscillating voltage at optimum resonance

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WO (1) WO2019021186A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2590693B (en) * 2019-12-24 2023-07-12 Quepal Ltd A resonant current control system

Citations (2)

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Publication number Priority date Publication date Assignee Title
US20100181306A1 (en) * 2009-01-16 2010-07-22 Whirlpool Corporation Method for controlling resonant power converters in induction heating systems, and induction heating system for carrying out such method
EP2546968A1 (en) * 2011-07-15 2013-01-16 Nxp B.V. Resonant converter control

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JP2002272122A (en) * 2001-03-09 2002-09-20 Sony Corp Resonance type power feeding apparatus
US7924584B1 (en) * 2004-01-29 2011-04-12 Marvell International Ltd. Power supply switching circuit for a halogen lamp
US9246391B2 (en) * 2010-01-22 2016-01-26 Power Systems Technologies Ltd. Controller for providing a corrected signal to a sensed peak current through a circuit element of a power converter
JP2016226088A (en) * 2015-05-27 2016-12-28 エスアイアイ・セミコンダクタ株式会社 Power supply system
CN110168900B (en) * 2016-12-14 2023-08-22 香港大学 Single stage Single Inductor Multiple Output (SIMO) inverter topology with accurate and independent amplitude control for each AC output

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100181306A1 (en) * 2009-01-16 2010-07-22 Whirlpool Corporation Method for controlling resonant power converters in induction heating systems, and induction heating system for carrying out such method
EP2546968A1 (en) * 2011-07-15 2013-01-16 Nxp B.V. Resonant converter control

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PARK ET AL, "Non-isolation Soft-switching Buck Converter with Tapped-Inductor for Wide-input Extreme Step-down applications", POWER ELECTRONICS SPECIALISTS CONFERENCE, 2005. PESC '05. IEEE 36TH, IEEE, PISCATAWAY, NJ, USA, (20051231), doi:10.1109/PESC.2005.1581897, ISBN 978-0-7803-9033-1, pages 1941 *

Also Published As

Publication number Publication date
GB201711937D0 (en) 2017-09-06
GB2579932B (en) 2022-10-19
GB2565273A (en) 2019-02-13
WO2019021186A1 (en) 2019-01-31
GB202002626D0 (en) 2020-04-08

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