CN211792105U - Multi-coil heating module and heating system - Google Patents
Multi-coil heating module and heating system Download PDFInfo
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- CN211792105U CN211792105U CN201922285138.1U CN201922285138U CN211792105U CN 211792105 U CN211792105 U CN 211792105U CN 201922285138 U CN201922285138 U CN 201922285138U CN 211792105 U CN211792105 U CN 211792105U
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Abstract
The application provides a multi-coil heating module and a heating system, wherein the multi-coil heating module comprises an electromagnetic induction coil and a heating control circuit, and the electromagnetic induction coil at least comprises a first electromagnetic induction coil and a second electromagnetic induction coil; the heating control circuit comprises: the at least two groups of half-bridge driving switches are respectively connected with the electromagnetic induction coils in a one-to-one correspondence manner, connected with a power supply end and used for driving the electromagnetic induction coils to work; the control module is electrically connected with the control end of the half-bridge driving switch and is used for independently driving each half-bridge driving switch to switch the switch state; and the resonance capacitor is connected with each electromagnetic induction coil to form a resonance circuit. And a common end is formed between the electromagnetic induction coils and is connected with the resonance capacitor. The scheme can realize flexible power distribution to each independent coil under the condition of total power limitation.
Description
Technical Field
The application relates to the field of hot working and heat treatment, in particular to a multi-coil heating module and a heating system.
Background
The heating scheme based on the electromagnetic induction is widely applied to various hot working fields and has the characteristics of safety, high heating efficiency and the like.
Heating devices using electromagnetic induction heating schemes today typically heat the appliance to be heated by the principle of electromagnetic induction by placing an electromagnetic induction coil below the appliance to be heated. If a plurality of electromagnetic induction coils are needed to be used for heating, the heating can be realized only by matching a corresponding number of control modules.
In practical application, a large number of electromagnetic induction stoves are used in a common hot pot store, and each stove is independently provided with a control module, but because the line conditions of each store are different, the total power for operation is fixed, and if the used stoves are more, the line overload is easy to occur, so that great potential safety hazard exists.
Disclosure of Invention
The application provides a multi-coil heating module and a heating system, which can flexibly distribute the induction output power of each electromagnetic induction coil according to the requirement under the condition that the total power is limited.
The embodiment of the application discloses a multi-coil heating module, which comprises an electromagnetic induction coil and a heating control circuit,
the electromagnetic induction coil at least comprises a first electromagnetic induction coil and a second electromagnetic induction coil;
the heating control circuit comprises:
the at least two groups of half-bridge driving switches are respectively connected with the electromagnetic induction coils in a one-to-one correspondence manner, connected with a power supply end and used for driving the electromagnetic induction coils to work;
the control module is electrically connected with the control end of the half-bridge driving switch and is used for independently driving each half-bridge driving switch to switch the switch state; and
and the resonant capacitor is connected with each electromagnetic induction coil to form a resonant circuit.
And a common end is formed between the electromagnetic induction coils and is connected with the resonance capacitor.
Optionally, the power source end includes a positive power source end and a negative power source end;
the resonant capacitor is connected between the common terminal and a negative power terminal and/or between the common terminal and a positive power terminal.
Optionally, the half-bridge driving switch includes a first half-bridge driving switch and a second half-bridge driving switch, and the control module includes a first driving terminal and a second driving terminal that can be driven separately;
the first driving end of the control module is electrically connected with the control end of the first half-bridge driving switch, and the second driving end of the control module is electrically connected with the control end of the second half-bridge driving switch;
the driving end of the first half-bridge driving switch is connected with one end of the first electromagnetic induction coil, and the second half-bridge driving switch is connected with one end of the second electromagnetic induction coil;
the other end of the first electromagnetic induction coil is connected with the other end of the second electromagnetic induction coil and is grounded through the resonance capacitor.
Optionally, the first electromagnetic induction coil and the second electromagnetic induction coil have the same winding direction.
Optionally, a first terminal is arranged between the first electromagnetic induction coil and the driving end of the first half-bridge driving switch;
the common end of the first electromagnetic induction coil and the second electromagnetic induction coil is provided with a second terminal;
and a third terminal is arranged between the second electromagnetic induction coil and the driving end of the second half-bridge driving switch.
Optionally, the electromagnetic induction coil further includes a third electromagnetic induction coil, the half-bridge driving switch further includes a third half-bridge driving switch, and the control module further includes a third driving end capable of being driven separately;
the third driving end of the control module is electrically connected with the control end of the third half-bridge driving switch;
the driving end of the third half-bridge driving switch is connected with one end of the third electromagnetic induction coil, and the other end of the third electromagnetic induction coil is connected with a common end between the first electromagnetic induction coil and the second electromagnetic induction coil and is grounded through the resonance capacitor.
Optionally, the half-bridge driving switch includes an IGBT, an MOS transistor, a bipolar transistor, a thyristor, or a thyristor.
Optionally, the inductance value of each electromagnetic induction coil ranges from 20 μ H to 200 μ H.
Optionally, the capacitance value of the resonance capacitor ranges from 0.2 μ F to 2 μ F.
The embodiment of the application also discloses a heating system, the heating system comprises a multi-coil heating module, and the multi-coil heating module is any one of the above multi-coil heating modules.
From the above, the multi-coil heating module and the heating system in the embodiment of the present application have at least two electromagnetic induction coils, and the same heating control circuit is used to implement independent control of the operating states of different electromagnetic induction coils, so as to flexibly distribute the induction output power of each electromagnetic induction coil according to the requirement under the condition that the total power is limited.
Drawings
Fig. 1 is a schematic structural diagram of a multi-coil heating module according to an embodiment of the present disclosure.
Fig. 2 is a schematic structural diagram of an electromagnetic induction coil provided in an embodiment of the present application.
Fig. 3 is a schematic structural diagram of a heating control circuit according to an embodiment of the present application.
Fig. 4 is another schematic structural diagram of a heating control circuit according to an embodiment of the present application.
Fig. 5 is a schematic diagram of another structure of a heating control circuit according to an embodiment of the present disclosure.
Fig. 6 is another schematic structural diagram of a multi-coil heating module according to an embodiment of the present disclosure.
Fig. 7 is a schematic diagram of another structure of a heating control circuit according to an embodiment of the present application.
Fig. 8 is a schematic view of an application scenario of the multi-coil heating module according to the embodiment of the present application.
Fig. 9 is a schematic structural diagram of a heating system according to an embodiment of the present application.
Detailed Description
The following detailed description of the preferred embodiments of the present application, taken in conjunction with the accompanying drawings, will make the advantages and features of the present application more readily appreciated by those skilled in the art, and thus will more clearly define the scope of the invention.
Referring to fig. 1, a first structure of a multi-coil heating module according to an embodiment of the present application is shown.
As shown in fig. 1, the multi-coil heating module includes an electromagnetic induction coil 1 and a heating control circuit 2, and the heating control circuit 2 includes two sets of half-bridge driving switches, a control module 22 and a resonant capacitor 23.
The electromagnetic induction coil 1 includes at least two electromagnetic induction coils, and the electromagnetic induction coils are wound along the same direction. Specifically, the electromagnetic induction coils may be disposed on different heating devices, or may be disposed at different positions of the same heating device.
Specifically, the two electromagnetic induction coils include a first electromagnetic induction coil 1a and a second electromagnetic induction coil 1b, which may be respectively located on different heating panels. For example, it can be placed on two different ovens. Wherein, form a common port O between this electromagnetic induction coil 1, this common port O can link together two electromagnetic induction coils's one end through the wire, so can make two electromagnetic induction coils pass through common port O and be connected with same heating control circuit 2, solved in the traditional heating device that each electromagnetic induction coil 1 all need correspond the complicated, the higher problem of cost of structure that has caused of heating control circuit 2.
In an embodiment, the electromagnetic induction coil includes a first electromagnetic induction coil AO and a second electromagnetic induction coil BO, and the half-bridge driving switch includes a first half-bridge driving switch 21a and a second half-bridge driving switch 21 b. A first terminal is arranged between the first electromagnetic induction coil AO and the driving end of the first half-bridge driving switch 21a, and the first electromagnetic induction coil AO is connected with the first half-bridge driving switch 21a through the first terminal; a second terminal is arranged at a common end O of the first electromagnetic induction coil AO and the second electromagnetic induction coil BO, and the common end O of the first electromagnetic induction coil AO and the second electromagnetic induction coil BO is connected with the resonant capacitor 23 through the second terminal; a third terminal is arranged between the second electromagnetic induction coil BO and the driving terminal of the second half-bridge driving switch 21b, and the second electromagnetic induction coil BO is connected with the driving terminal of the second half-bridge driving switch 21b through the third terminal.
Referring to fig. 2, a structure of an electromagnetic induction coil according to an embodiment of the present application is shown. In another embodiment, the electromagnetic induction coil 1 includes a first electromagnetic induction coil AO and a second electromagnetic induction coil BO, which may be wound on different strip structures and connected at a common end O of the first electromagnetic induction coil AO and the second electromagnetic induction coil BO.
It will be appreciated that the electromagnetic coil may be in the form of a concave coil or other conventional coil structure other than the coil shown in fig. 1-2, and will not be described in detail herein.
In one embodiment, the inductance of each electromagnetic coil is in the range of 20 μ H-200 μ H to ensure the working performance of the electromagnetic coil. It is understood that the specific parameters of the electromagnetic induction coil can be selected according to practical situations, and the present application does not limit the specific parameters.
The half-bridge driving switch is respectively connected with the two electromagnetic induction coils in a one-to-one correspondence manner, is connected with a power supply end and is used for driving the electromagnetic induction coils to work. Wherein, a set of half-bridge drive switch can be connected with an electromagnetic induction coil to the operating condition of this electromagnetic induction coil of independent control, consequently, two electromagnetic induction coils realize independent control through two sets of half-bridge drive switches respectively.
In an embodiment, the half-bridge driving switch may include an IGBT, a MOS transistor, a bipolar transistor, a thyristor, or a thyristor as the controllable switch of the heating control circuit 2. In particular, the half-bridge driving switch may include two diodes to form a half-bridge circuit.
The control module 22 is electrically connected to the control terminals of the half-bridge driving switches, and is configured to drive each half-bridge driving switch individually for switching the switch states.
The control module 22 may include an MCU unit with a PWM output function, and the MCU unit may drive the half-bridge driving switch to switch the operating state by controlling the PWM characteristic, so as to control the operation of the electromagnetic induction coil. It can be understood that the heating control mode of the MCU can be designed according to actual conditions, and the existing heating control mode can also be adopted.
In an embodiment, the control module 22 may receive control from a user through a control button or a touch screen, so as to switch the control mode of the electromagnetic induction coil. The control button and the touch screen can refer to the existing heating equipment, and the description is omitted here.
The resonant capacitor 23 is connected to each of the electromagnetic induction coils to form a resonant circuit. The capacitance range of the resonant capacitor 23 is 0.2 μ F to 2 μ F, and the specific value of the resonant capacitor 23 may be matched according to the parameter of the electromagnetic induction coil, which is not limited in this application.
In one embodiment, the power supply terminals include a positive power supply terminal and a negative power supply terminal. The resonant capacitor 23 is connected between the common terminal O of the two electromagnetic induction coils and the negative power supply terminal, or the resonant capacitor 23 is connected between the common terminal O of the two electromagnetic induction coils and the positive power supply terminal; in another embodiment, the resonant capacitor 23 is connected between the common terminal O of the two electromagnetic induction coils and the negative power terminal, and between the common terminal O of the two electromagnetic induction coils and the positive power terminal. The two electromagnetic induction coils can normally work only by sharing one group of resonant capacitors 23, the structure is simple, and the manufacturing cost is saved.
Referring to fig. 3, a structure of a heating control circuit according to an embodiment of the present disclosure is shown.
The multi-coil heating module comprises electromagnetic induction coils L1-L2 and a heating control circuit, wherein the heating control circuit comprises two groups of half-bridge driving switches T1-T4, a control module 12, resonant capacitors C1 and C2.
Specifically, the electromagnetic induction coil includes a first electromagnetic induction coil L1 and a second electromagnetic induction coil L2, the half-bridge driving switches here adopt IGBTs as driving switches, and include a first half-bridge driving switch T1-T2, a second half-bridge driving switch T3-T4, and 4 IGBT drives, and the control module 12 may include a first driving terminal and a second driving terminal that can be driven separately, where the first driving terminal includes PWM1 and PWM2, and the second driving terminal includes PWM3 and PWM 4.
The first driving terminals PWM1 and PWM2 of the control module 12 are electrically connected to the control terminals of the first half-bridge driving switches T1 to T2, that is, the IGBT drivers connected to the first half-bridge driving switches T1 to T2, and the second driving terminals PWM3 and PWM4 of the control module 12 are electrically connected to the control terminals of the second half-bridge driving switches T3 to T4, that is, the IGBT drivers connected to the second half-bridge driving switches T3 to T4.
The driving terminal a of the first half-bridge driving switch T1-T2 is connected to one end of the first electromagnetic coil L1, and the driving terminal B of the second half-bridge driving switch T3-T4 is connected to one end of the second electromagnetic coil L2.
The other end of the first electromagnetic induction coil L1 is connected to the other end of the second electromagnetic induction coil L2 to form a common terminal O, which is connected to the negative power supply terminal V-via a resonant capacitor C1 and to the positive power supply terminal V + via another resonant capacitor C2.
Referring to fig. 4, another structure of the heating control circuit according to the embodiment of the present application is shown.
The difference from fig. 3 is that the other end of the first electromagnetic induction coil L1 is connected to the other end of the second electromagnetic induction coil L2 to form a common terminal O, and the common terminal O is connected to the negative power supply terminal V-only through the resonant capacitor C1.
Referring to fig. 5, a further structure of the heating control circuit according to the embodiment of the present application is shown.
It is different from fig. 3 and 4 in that the other end of the first electromagnetic induction coil L1 and the other end of the second electromagnetic induction coil L2 are connected to form a common terminal O, which is connected to the positive power supply terminal V + only through the resonant capacitor C2.
In one implementation, when the first electromagnetic coil L1 needs to work, the control module 12 controls the corresponding IGBT driving through the first driving terminals PWM1 and PWM2, so as to turn on the first half-bridge driving switch T1-T2. At this time, the first electromagnetic induction coil L1 cooperates with the resonant capacitor C1 and/or C2 to generate resonance, and the first electromagnetic induction coil L1 forms electromagnetic induction effect with the coil at the corresponding position of the appliance to be heated, so as to realize heating.
When the second electromagnetic coil L2 needs to work, the control module 12 controls the corresponding IGBT driving through the second driving terminals PWM3 and PWM4, so as to turn on the second half-bridge driving switch T3-T4. At this time, the second electromagnetic induction coil L2 generates resonance in cooperation with the resonance capacitor C1 and/or C2, and heating is achieved by the electromagnetic induction effect formed by the second electromagnetic induction coil L2 and the coil at the corresponding position of the appliance to be heated.
The first electromagnetic induction coil L1 and the second electromagnetic induction coil L2 may be operated simultaneously or separately.
Referring to fig. 6, another structure of the multi-coil heating module according to the embodiment of the present application is shown.
As shown in fig. 6, the multi-coil heating module includes three electromagnetic induction coils 1, the electromagnetic induction coil 1 includes a first electromagnetic induction coil AO, a second electromagnetic induction coil BO and a third electromagnetic induction coil CO, and the half-bridge driving switch includes a first half-bridge driving switch 21a, a second half-bridge driving switch 21b and a third half-bridge driving switch 21 c. The first electromagnetic induction coil AO is connected to the first half-bridge drive switch 21a, the second electromagnetic induction coil BO is connected to the second half-bridge drive switch 21b, the third electromagnetic induction coil CO is connected to the third half-bridge drive switch 21c, and the first electromagnetic induction coil AO, the second electromagnetic induction coil BO, and the third electromagnetic induction coil CO have a common terminal O.
The common terminal O is connected to the resonant capacitor 23 and is grounded through the resonant capacitor 23, and the first half-bridge driving switch 21a, the second half-bridge driving switch 21b and the third half-bridge driving switch 21c are connected to the control module 22 to be controlled by the control module 22 to implement operation or disconnection.
In addition to the connection manner of fig. 6, the common terminal O may be connected to the outermost coil ends of the electromagnetic induction coils, and the terminal A, B, C may be connected to the innermost coil ends of the first electromagnetic induction coil AO, the second electromagnetic induction coil BO, and the third electromagnetic induction coil CO. It is understood that the specific connection manner can be adjusted according to the actual situation, and fig. 6 and the above connection manners are only examples.
Through the mode, the same heating control circuit can respectively control the three electromagnetic induction coils, and an additional adaptive circuit (such as a separately configured power supply circuit) is not needed, so that the cost of the equipment is reduced, and the induction output power of each electromagnetic induction coil can be flexibly distributed according to the requirement under the condition that the total power is limited.
Referring to fig. 7, a further structure of the heating control circuit according to the embodiment of the present application is shown.
As shown in fig. 7, the electromagnetic induction heating module set includes electromagnetic induction coils L1-L3 and a heating control circuit including three sets of half-bridge driving switches T1-T6, a control module 12 and resonant capacitors C1, C2.
Specifically, the electromagnetic induction coil comprises a first electromagnetic induction coil L1, a second electromagnetic induction coil L2 and a third electromagnetic induction coil L3 which are arranged in sequence, wherein the half-bridge driving switches adopt IGBTs as driving switches and comprise a first half-bridge driving switch T1-T2, a second half-bridge driving switch T3-T4, a third half-bridge driving switch T5-T6 and 6 IGBT drives, the control module 12 can comprise a first driving end, a second driving end and a third driving end which can be driven independently, wherein the first driving end comprises PWM1 and PWM2, the second driving end comprises PWM3 and PWM4, and the third driving end comprises PWM5 and PWM 6.
The first driving terminals PWM1 and PWM2 of the control module 12 are electrically connected to the control terminals of the first half-bridge driving switches T1-T2, i.e., the IGBT drivers connected to the first half-bridge driving switches T1-T2. The second driving terminals PWM3 and PWM4 of the control module 12 are electrically connected to the control terminals of the second half-bridge driving switches T3 to T4, i.e., the IGBT drivers connected to the second half-bridge driving switches T3 to T4. The third driving terminals PWM5 and PWM6 of the control module 12 are electrically connected to the control terminals of the third half-bridge driving switches T5 to T6, i.e., the IGBT drivers connected to the third half-bridge driving switches T5 to T6.
The driving terminal a of the first half-bridge driving switch T1-T2 is connected to one end of the first electromagnetic coil L1, the driving terminal B of the second half-bridge driving switch T3-T4 is connected to one end of the second electromagnetic coil L2, and the driving terminal C of the third half-bridge driving switch T5-T6 is connected to one end of the second electromagnetic coil L3.
The other end of the first electromagnetic induction coil L1 is connected to the other end of the second electromagnetic induction coil L2 and the other end of the third electromagnetic induction coil L3 to form a common terminal O, and is connected to the negative power supply terminal V "through the resonant capacitor C1 and to the positive power supply terminal V + through the resonant capacitor C2.
In addition to the circuit configuration of fig. 7, in another embodiment, the other end of the first electromagnetic coil L1 is connected to the other ends of the second electromagnetic coil L2 and the third electromagnetic coil L3 to form a common terminal O, and the common terminal O is connected to the negative power supply terminal V-only through the resonant capacitor C1.
Besides, in another embodiment, the difference is that the other end of the first electromagnetic induction line segment L1 is connected to the other ends of the second electromagnetic induction line segment L2 and the third electromagnetic induction line segment L3 to form a common terminal O, and the common terminal O is connected to the positive power supply terminal V + only through the resonant capacitor C2.
The normal operation of the heating control circuit can be realized by the different embodiments of the resonant capacitor, and other obvious connection modes are within the protection scope of the present application.
Referring to fig. 8, an application scenario of the multi-coil heating module according to the embodiment of the present application is shown.
The figure shows the induction zones of two appliances to be heated, comprising a first induction zone 31, a second induction zone 32 and a heating control circuit 33. When the first electromagnetic induction coil works, the first electromagnetic induction coil and the to-be-heated appliance placed on the first induction area 31 generate an electromagnetic induction effect and heat the to-be-heated appliance; when the second electromagnetic induction coil is operated, it will generate electromagnetic induction effect with the heated device placed on the second induction area 32 and heat it.
At this time, according to the heating requirements of different appliances to be heated, the first sensing area 31 and the second sensing area 32 can be selected to be independently controlled, or the first sensing area 31 and the second sensing area 32 can be simultaneously heated.
When only the first induction area 31 or the second induction area 32 is used, the heating control of the first induction area 31 can be realized by controlling the induction output power of the corresponding electromagnetic induction coil.
When the first induction area 31 and the second induction area 32 are used simultaneously, the induction output powers of the first electromagnetic induction coil and the second electromagnetic induction coil can be respectively controlled in the heating process, so that different appliances to be heated can obtain different heating powers. Specifically, the multi-coil heating module can distribute power to the corresponding electromagnetic induction coils according to the power input power of the device, so as to ensure that the heating power of different electromagnetic induction coils is satisfied.
For example, if the total power input power is 4000W, the to-be-heated appliance corresponding to the second electromagnetic induction coil needs to be heated by a high power to perform "hard fire" heating, and the to-be-heated appliance corresponding to the first electromagnetic induction coil is in a low-power heat-preservation heating state, the power ratio between the first electromagnetic induction coil and the second electromagnetic induction coil can be adjusted at this time, so that the induction output power of the second electromagnetic induction coil is 3000W, and the induction output power of the first electromagnetic induction coil is 1000W, so as to meet the requirements of both sides, as long as the induction output powers of the two electromagnetic induction coils do not exceed 4000W.
In another case, the line is susceptible to overload if both electromagnetic coils are in a high power operating state. If the standby heaters corresponding to the two electromagnetic induction coils need to be heated at high power, the heating control circuit can distribute the induction output power of the first electromagnetic induction coil and the induction output power of the second electromagnetic induction coil to be 2000W respectively and lock the maximum power of the first electromagnetic induction coil and the second electromagnetic induction coil so as to avoid the overload risk of the first electromagnetic induction coil and the second electromagnetic induction coil, and the induction output power of each electromagnetic induction coil can be flexibly distributed according to the requirement under the condition that the total power is limited.
Certainly, in the practical application process, the specific induction output power control mode can be set according to the needs, for example, the magnitudes of the induction output powers of the first electromagnetic induction coil and the second electromagnetic induction coil can be flexibly set according to the needs, so that the heating control circuit can realize the heating control between two or more electromagnetic induction coils under the condition of a certain total power.
In an embodiment, each device in which the sensing region is located may be provided with a corresponding control button 4, and the control button 4 may be connected to the heating control circuit 33 through a signal line, so that the heating control circuit 33 can receive the control signal generated by the control button 4.
Of course, except that the control keys 4 are respectively arranged on the device where the sensing area is located, the control keys can also be arranged on the device where the heating control circuit 33 is placed, so as to facilitate the unified management of the user, and the specific arrangement mode can be set according to actual needs, which is not described herein.
It can be known that, set up first electromagnetic induction coil L1 and second electromagnetic induction coil L2 to utilize this heating control circuit can realize carrying out heating control to two or more electromagnetic induction coils, above-mentioned scheme is simple structure not only, low in manufacturing cost, reducible heating control circuit's use quantity, and can realize under the limited circumstances of total power, according to the response output power of each electromagnetic induction coil of nimble distribution of demand.
Referring to fig. 9, a structure of a heating system according to an embodiment of the present application is shown.
The heating system includes a multi-coil heating module 10, and the multi-coil heating module 10 is the multi-coil heating module 10 of any one of the embodiments of fig. 1-8.
The heating system 100 may refer to a dc power supply composed of an ac input module and a rectifier bridge as shown in fig. 2, and the dc power supply is connected to the heating control circuit of the multi-coil heating module 10 through a filter module composed of an inductor L0 and a capacitor C0. In addition, the multi-coil heating module 10 can receive control from a user by setting a control button or a touch screen, so as to switch the control mode of the electromagnetic induction coil.
It should be noted that, in a specific implementation manner of the heating system, besides the multi-coil heating module 10, for example, the above-mentioned dc power supply, the control button, the touch screen and its corresponding implementation manner, etc., refer to the solutions disclosed in the art, and the application does not limit this.
From the above, the heating system can realize flexible control of the heating process of a plurality of devices by arranging the multi-coil heating module as mentioned in the embodiments of fig. 1 to 8. The scheme has the advantages of simple structure, low manufacturing cost and capability of reducing the using quantity of the heating control circuits and flexibly distributing the induction output power of each electromagnetic induction coil according to the requirement under the condition that the total power is limited.
The embodiments of the present application have been described in detail with reference to the drawings, but the present application is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present application within the knowledge of those skilled in the art.
Claims (10)
1. The utility model provides a many coils heating module, includes electromagnetic induction coil and heating control circuit, its characterized in that:
the electromagnetic induction coil at least comprises a first electromagnetic induction coil and a second electromagnetic induction coil;
the heating control circuit comprises:
the at least two groups of half-bridge driving switches are respectively connected with the electromagnetic induction coils in a one-to-one correspondence manner, connected with a power supply end and used for driving the electromagnetic induction coils to work;
the control module is electrically connected with the control end of the half-bridge driving switch and is used for independently driving each half-bridge driving switch to switch the switch state; and
the resonance capacitor is connected with each electromagnetic induction coil to form a resonance circuit;
and a common end is formed between the electromagnetic induction coils and is connected with the resonance capacitor.
2. The multi-coil heating module of claim 1, wherein:
the power supply ends comprise a positive power supply end and a negative power supply end;
the resonant capacitor is connected between the common terminal and a negative power terminal and/or between the common terminal and a positive power terminal.
3. The multi-coil heating module of claim 2, wherein:
the half-bridge driving switch comprises a first half-bridge driving switch and a second half-bridge driving switch, and the control module comprises a first driving end and a second driving end which can be driven independently;
the first driving end of the control module is electrically connected with the control end of the first half-bridge driving switch, and the second driving end of the control module is electrically connected with the control end of the second half-bridge driving switch;
the driving end of the first half-bridge driving switch is connected with one end of the first electromagnetic induction coil, and the second half-bridge driving switch is connected with one end of the second electromagnetic induction coil;
the other end of the first electromagnetic induction coil is connected with the other end of the second electromagnetic induction coil and is grounded through the resonance capacitor.
4. The multi-coil heating module of claim 3 wherein the first and second electromagnetic coils are wound in the same direction.
5. The multi-coil heating module of claim 3, wherein:
a first terminal is arranged between the first electromagnetic induction coil and the driving end of the first half-bridge driving switch;
the common end of the first electromagnetic induction coil and the second electromagnetic induction coil is provided with a second terminal;
and a third terminal is arranged between the second electromagnetic induction coil and the driving end of the second half-bridge driving switch.
6. The multi-coil heating module of claim 3 wherein said electromagnetic coil further comprises a third electromagnetic coil, said half-bridge drive switch further comprises a third half-bridge drive switch, said control module further comprising a third drive terminal that is individually drivable;
the third driving end of the control module is electrically connected with the control end of the third half-bridge driving switch;
the driving end of the third half-bridge driving switch is connected with one end of the third electromagnetic induction coil, and the other end of the third electromagnetic induction coil is connected with a common end between the first electromagnetic induction coil and the second electromagnetic induction coil and is grounded through the resonance capacitor.
7. The multi-coil heating module of any of claims 1-6, wherein the half-bridge drive switch comprises an IGBT, MOS transistor, bipolar transistor, thyristor, or thyristor.
8. The multi-coil heating module of any of claims 1-6, wherein each of said electromagnetic coils has an inductance value in the range of 20 μ H-200 μ H.
9. The multi-coil heating module of any of claims 1-6, wherein the resonant capacitor has a capacitance value in the range of 0.2 μ F-2 μ F.
10. A heating system comprising a multi-coil heating module according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922285138.1U CN211792105U (en) | 2019-12-18 | 2019-12-18 | Multi-coil heating module and heating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922285138.1U CN211792105U (en) | 2019-12-18 | 2019-12-18 | Multi-coil heating module and heating system |
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| Publication Number | Publication Date |
|---|---|
| CN211792105U true CN211792105U (en) | 2020-10-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201922285138.1U Active CN211792105U (en) | 2019-12-18 | 2019-12-18 | Multi-coil heating module and heating system |
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|---|---|
| CN (1) | CN211792105U (en) |
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2019
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