WO2023059271A1 - Circuit de commande de puissance pour table de cuisson à induction - Google Patents

Circuit de commande de puissance pour table de cuisson à induction Download PDF

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Publication number
WO2023059271A1
WO2023059271A1 PCT/TR2021/050942 TR2021050942W WO2023059271A1 WO 2023059271 A1 WO2023059271 A1 WO 2023059271A1 TR 2021050942 W TR2021050942 W TR 2021050942W WO 2023059271 A1 WO2023059271 A1 WO 2023059271A1
Authority
WO
WIPO (PCT)
Prior art keywords
power
circuit
switch
control circuit
resonance
Prior art date
Application number
PCT/TR2021/050942
Other languages
English (en)
Inventor
Metin OZTURK
Fatih ZUNGOR
Aytac OZ
Yunus Emre AKGUL
Original Assignee
Mamur Teknoloji Sistemleri San. A.S.
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 Mamur Teknoloji Sistemleri San. A.S. filed Critical Mamur Teknoloji Sistemleri San. A.S.
Priority to PCT/TR2021/050942 priority Critical patent/WO2023059271A1/fr
Publication of WO2023059271A1 publication Critical patent/WO2023059271A1/fr

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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
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/4815—Resonant converters
    • 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
    • H02M1/0083—Converters characterised by their input or output configuration
    • H02M1/009—Converters characterised by their input or output configuration having two or more independently controlled outputs
    • 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
    • H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/02—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc
    • H02M5/04—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters
    • H02M5/22—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M5/275—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc 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
    • H02M5/293—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc 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
    • H02M5/2932—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc 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, current or power
    • 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
    • H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/02—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc
    • H02M5/04—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters
    • H02M5/22—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M5/275—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc 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
    • H02M5/297—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc 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 for conversion of frequency
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/06—Control, e.g. of temperature, of power
    • H05B6/062—Control, e.g. of temperature, of power for cooking plates or the like

Definitions

  • the invention relates to a power and control circuit for an induction hob operated with both half-bridge series resonance and single-switch partial resonance.
  • the induction hobs operate by means of a coil that creates a magnetic field.
  • Induction-heated hobs are widely utilized in both industrial and household kitchens. These hobs have glass or glass ceramic surfaces.
  • the ignition system is activated by a control panel.
  • the control panel is to be in the form of a touchpad or a button.
  • Induction hob models produced in various sizes and dimensions, are produced in single or different numbers of cooking zones. In these hobs, only a pot, pan or a container with a magnetic charge is heated. Since induction-heated hobs directly heat the bottom of the pan, the possibility of an accident is also minimized. Thus, heating efficiency can be achieved safely.
  • Induction hobs are third-generation kitchen cooking systems.
  • the heating feature of these hobs works fast. This is because a magnetic charge, which is heated by being placed on the hob, turns into a heat source, not the hob itself. In this way, the possibility of burning the hands of the hob itself is eliminated.
  • Induction hotplates and hotplates which are not placed on a magnetic load suitable for heating, hardly get hot. This, for example, minimizes the possibility of the food being cooked in a pot getting burned.
  • power induction and electromagnetism provide heat generation where it is needed. In other words, the heat is created instantly at the base of a load with a heated magnetic feature, and when the heating is turned off, the heat transferred from the hob is lost instantly.
  • Induction heating systems have a power and control circuit.
  • the power and control circuit consists of a switched-mode inverter or inverters that provide the heating.
  • An inverter circuit is completed by the application of a magnetic charge on the hob.
  • the main components of classical induction heating systems are the rectifier and the resonant inverter.
  • resonant inverters are available in different resonant inverter topologies depending on the balance between cost and performance. Commonly used resonant inverter topologies are half-bridge series resonant inverter topologies and partial resonance inverter topologies.
  • WO2014167814 discloses an induction cooker in which it is detected whether there is an object on the hob before induction heating and if the object is removed before heating, it is determined that the object is not on the hob.
  • This induction heater includes a plurality of heating coils, a plurality of inverters, a plurality of switching circuits, an instruction means, a sensor assembly, and a pan detection means.
  • the number of inverters is less than the number of heating coils to provide a high-frequency current to the heating coils. Additionally, it aims to reduce the cost of an induction heater with a large number of heating coils while ensuring safety.
  • the object of the invention is to provide a power and control circuit for an induction heated cooker that can provide multiple magnetic heating in both half-bridge series resonance and single-switch partial resonance operation to meet the low-cost product expectation in induction heated hobs.
  • the invention comprises a power and control circuit for an induction hob comprising a control circuit adapted to control a magnetic heating mode corresponding to the heating signal from a user interface via a microcontroller and to detect a heated load via the microcontroller; a power circuit connected to the control circuit so as to provide heating in the magnetic heating mode corresponding to the incoming heating signal and at least one switched-mode inverter converts the voltage applied from an AC or a DC power source to a high-frequency current on a circuit path; an upper switch assembly including at least one semiconductor switch connected on the power circuit; a subswitch assembly including at least one semiconductor switch connected on the power circuit; a heater assembly with at least one coil connected to the circuit path where the upper switch group and the lower switch group are connected to each other and a resistor as the equivalent of the load disposed on the coil; a resonance capacitor connected via the circuit path to each heater assembly; at least one partial resonance switch assembly connected via circuit path between the resonance capacitor and the heater assembly characterized in that the power circuit
  • each semiconductor switch in the partial resonance switch group in the power circuit in which the single-switch partial resonance magnetic heating is activated is configured to operate as a semiconductor switch or to operate as a controlled diode.
  • a semiconductor switch is provided to operate in two different tasks under different alternans of the AC power supply.
  • each coil of the heater assembly in the power circuit where the half-bridge series resonance switched magnetic heating is activated is configured to operate at the same frequency.
  • the half-bridge series resonant operating mode of the inverter in the power circuit a configuration is obtained that ensures that each load heated by multiple coils operates at the same frequency value of each coil.
  • each partial resonance switch group in the operatively adjusted power circuit connected to the DC power source is configured to be located on the downstream of the heater assembly.
  • each partial resonance switch assembly in the operatively tuned power circuit connected to the AC power supply is configured to be upstream of the heater assembly.
  • a preferred embodiment of the invention comprises the operably configured power circuit connected to the AC power supply is connected to each semiconductor switch and comprises at least one free pass diode and at least one capacitor connected in parallel resonance.
  • the power circuit is configured to operate efficiently under AC mains voltage.
  • each heater assembly coil is configured to operate without being connected to each other.
  • the induction heated hob is configured to provide independent heating in accordance with the incoming heating signal.
  • Figure 1 is the illustration of the AC power supply connected circuit diagram for the power and control circuit for an induction hob according to the subject matter.
  • Figure 2 is the illustration of the DC power supply connected circuit diagram for the power and control circuit for an induction hob.
  • Figure 3 is the illustration of the circuit diagram of the power and control circuit for an induction hob of the invention in half-bridge series resonance switched mode with an AC power supply connected.
  • Figure 4 is the illustration of the circuit diagram in half-bridge series resonance switched mode with a DC power supply connected to the power and control circuit for an induction hob
  • Figure 5 is the illustration of a single-switch partial resonance operating circuit diagram with an AC power supply connected to the power and control circuit for an induction hob.
  • Figure 6 is the illustration of a single-switch partial resonance operative circuit diagram with a DC power supply connected to the power and control circuit for an induction hob.
  • Figure 1 shows the general AC power supply connected circuit diagram of the power and control circuit for an induction hob of the invention.
  • Figure 2 a general diagram of the DC power supply connected circuit diagram of the power and control circuit for an induction heating cooker of the invention is shown.
  • Figure 3 shows the circuit diagram of the halfbridge series resonance switched operating mode with the AC power supply connected to the power and control circuit for an induction hob.
  • Figure 4 shows the circuit diagram of a half-bridge series resonance switched circuit with a DC power supply connected to the power and control circuit for an induction hob according to the subject matter invention.
  • Figure 5 shows a single-switch partial resonance operating circuit diagram with an AC power supply connected to the power and control circuit for an induction hob.
  • FIG. 6 shows a singleswitch partial resonance operating circuit diagram with a DC power supply connected to the power and control circuit for an induction-heated cooker, which is the subject of the invention.
  • a power and control circuit (10) the heating mode is set to operate from a user interface (12) and the heating signal comes to a control circuit (14).
  • the control circuit (14) there is a microcontroller (16) which is set to activate the predetermined algorithms.
  • the microcontroller (16) is configured to control a magnetic heating mode with the corresponding predetermined algorithms stored in its memory.
  • the microcontroller (16) is adjusted in such a way that it detects a heated load (41 ) with the appropriate algorithms predetermined in its memory.
  • the operating control circuit (14) is provided with both heating mode control and a load detection.
  • the control circuit is then connected to a power circuit.
  • the power circuit (18) is arranged to initiate a magnetic heating mode. Thus, it is configured to conduct the heating.
  • At least one inverter (44) (46) (48) (50) (52) (54) (60) (62) (66) is provided on the power circuit (18) configured to convert voltage applied from a DC power source (24) or an AC power source (22) to high-frequency current on a circuit path (26).
  • Each inverter here is a semiconductor switch (44) (46) (50) (52) (60) (62) and a set of switches (48) (54) (66).
  • a regulated power circuit (18) to operate at an AC mains voltage (22) comprises at least one free pass diode (32) with resonance connection in parallel to the semiconductor switch (44) (46) (50) (52) (60) (62) and at least one capacitor (28).
  • a switch group (48) (54) (66) is obtained such that at least two switches (44) (46) (50) (52) (60) (62) are connected.
  • a resistor (36) and a coil (38) are connected to the resistor on each heater assembly.
  • a resonance capacitor (42) is connected to each heater assembly (40) via the circuit path (26).
  • the power circuit (18) includes a first switch (44) of the n-channel type connected to the AC power supply (22) via the circuit path (26) and connected such at the free pass diode (32) is reverse biased.
  • the power circuit (18) includes a first switch (44) of the n-channel type connected via circuit path (26) to the DC power supply (24).
  • the power circuit (18) connected to the AC power source (22) is having a second switch (46) of p-channel type connected to the output of the first switch (44) via the circuit path (26) and connected such that the free pass diode (32) is forward biased.
  • the power circuit (18) connected to the DC power source (22) includes a second switch (46) of the p-channel type connected via the circuit path (26) to the output of the first switch (44).
  • a second switch (46) of the p-channel type connected via the circuit path (26) to the output of the first switch (44).
  • an upper switch group (48) configured to provide a half-bridging is obtained.
  • a third switch (50) of n-channel type connected to the output of the second switch (46) of the upper switch group (48) via the circuit path and under the DC mains voltage (24).
  • a fourth switch (52) of the p-channel type connected via the circuit path (26) to the output of the third switch (50) and connected such that the free pass diode (32) is forward biased.
  • a fourth switch (52) of the p-channel type connected via the circuit path (26) to the output of the third switch (50).
  • a sub-switch group (54) configured to provide a resonance line is obtained.
  • the upper switch assembly (48) or lower switch assembly (54) is connected to the appropriate switch assembly (48) from an intermediate node (56), enabling an appropriate heating mode connected heater assembly (40) and the resonance capacitor (42) are adjusted to operate.
  • the sub-switch assembly is set to operate in partial resonance.
  • Each partial resonance switch group (66) consists of an n-channel type partial resonance upper switch (60) and a p-channel type partial resonance lower switch (62) coupled to a partial resonance upper switch (60).
  • Each partial resonance upper switch (60) and each partial resonance lower switch (62) in the power circuit (18) operating under AC mains voltage (22) has a parallel resonance connected free pass diode (32) and capacitor (28).
  • Each semiconductor switch (50) (52) (60) (62) in the partial resonance switch group (66) in the power circuit (18) in which the single-switch partial resonance magnetic heating is activated, with connection to the AC mains voltage (22) (24) operates in the form of a semiconductor switch and a regulated or controlled diode.
  • the upper switch group (48) to which the first and second switches (44) are connected By activating the upper switch group (48) to which the first and second switches (44) are connected, providing partial resonance switching in the power circuit (18) in which single-switch partial resonance magnetic heating is activated, with DC mains voltage connection, the upper switch group (48) is activated, from the top of the circuit to the bottom of the heater assembly. It is arranged to work together with the partial resonance switch groups (66) to which the partial resonance switches (60) (62) disposed on its lower side are connected.
  • Each heater assembly coil (38) in the power circuit (18) in which half-bridged series resonance switched magnetic heating is activated includes its configuration to operate at the same frequency value.
  • Each partial resonance switch assembly (66) in the operatively tuned power circuit (18) connected to the DC power supply (24) includes its configuration to be downstream of the heater assembly (40).
  • Each partial resonance switch assembly (66) in the operatively tuned power circuit (18) connected to the AC power source (22) includes its configuration to be upstream of the heater assembly (40).
  • each heater assembly coil (38) in the power circuit (18) operating under AC or DC voltage (22) (24) operates independently of each other and is configured to be controllable. In this way, different power levels can be applied to each coil (38) in the circuit (18), and while operating a coil, other coils cannot be operated.
  • the total amount of coil (38) to be used in the circuit (18) should be determined at the beginning of the design.
  • the converter In the power and control circuit (10), the converter is designed to operate in both halfbridge series resonance and single-switch partial resonance.
  • a single heated load (41) of the resonant circuit (48) (54) (66), the resistor (36) and coil (38) located in the heater assembly (40) are modeled.
  • the amount of load (41) desired to be heated can be increased.
  • the increase in the load amount (41 ) is limited by the current capacity of the semiconductors of the first switch, second switch, third switch and fourth switch (44) (46) (50) (52) carrying the main current of the entire circuit.
  • each semiconductor switch (44) (46) (50) (52) (60) (62) in the circuit is a bipolar transistor with an isolated gate.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Induction Heating (AREA)

Abstract

L'invention concerne un circuit de puissance et de commande pour une table de cuisson à induction, comprenant un circuit de puissance (18) comportant au moins un onduleur (44) (46) (48) (50) (52) (54) (60) (62) (66) couplé au circuit de commande (14) ; un ensemble commutateur supérieur (48) et un ensemble commutateur inférieur (54) connecté au circuit de puissance (18) ; au moins un ensemble de chauffage (40) ; un condensateur de résonance (42) ; au moins un ensemble commutateur à résonance partielle (66), l'onduleur (44) (46) (48) (50) (52) (54) étant configuré pour faire fonctionner le circuit de puissance (18) dans un mode de chauffage magnétique commuté en résonance série en demi-pont avec activation de l'ensemble commutateur supérieur (48) ou de l'ensemble commutateur inférieur (54) ; l'onduleur (50) (52) (54) (60) (62) est également configuré de telle sorte qu'une partie à commutation unique du circuit de puissance (18) fonctionne en mode de chauffage magnétique résonnant pour une activation avec un ensemble commutateur secondaire (54) ou un ensemble commutateur à résonance partielle (66).
PCT/TR2021/050942 2021-09-15 2021-09-15 Circuit de commande de puissance pour table de cuisson à induction WO2023059271A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/TR2021/050942 WO2023059271A1 (fr) 2021-09-15 2021-09-15 Circuit de commande de puissance pour table de cuisson à induction

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/TR2021/050942 WO2023059271A1 (fr) 2021-09-15 2021-09-15 Circuit de commande de puissance pour table de cuisson à induction

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080246336A1 (en) * 2007-04-07 2008-10-09 Fishman Oleg S Current Fed Inverter with Pulse Regulator for Electric Induction Heating, Melting and Stirring
US20120268219A1 (en) * 2011-04-22 2012-10-25 Continental Automotive Systems Us, Inc. Synchronous full-bridge power oscillator with leg inductors
KR101308411B1 (ko) * 2012-04-04 2013-09-13 전남대학교산학협력단 고속 공진점 추종방법 및 그 방법을 이용한 유도가열시스템

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080246336A1 (en) * 2007-04-07 2008-10-09 Fishman Oleg S Current Fed Inverter with Pulse Regulator for Electric Induction Heating, Melting and Stirring
US20120268219A1 (en) * 2011-04-22 2012-10-25 Continental Automotive Systems Us, Inc. Synchronous full-bridge power oscillator with leg inductors
KR101308411B1 (ko) * 2012-04-04 2013-09-13 전남대학교산학협력단 고속 공진점 추종방법 및 그 방법을 이용한 유도가열시스템

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
KOUTROULIS E., CHATZAKIS J., KALAITZAKIS K., VOULGARIS N.C.: "A bidirectional, sinusoidal, high-frequency inverter design", IEE PROCEEDINGS : ELECTRIC POWER APPLICATIONS, vol. 148, no. 4, 6 July 2001 (2001-07-06), GB , pages 315 - 321, XP006016909, ISSN: 1350-2352, DOI: 10.1049/ip-epa:20010351 *
VISHNURAM PRADEEP, RAMACHANDIRAN GUNABALAN, RAMASAMY SRIDHAR, DAYALAN SUCHITRA: "A comprehensive overview of power converter topologies for induction heating applications", INTERNATIONAL TRANSACTIONS ON ELECTRICAL ENERGY SYSTEMS, vol. 30, no. 10, 1 October 2020 (2020-10-01), pages 1 - 33, XP093061080, ISSN: 2050-7038, DOI: 10.1002/2050-7038.12554 *

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