CN103596307A - Resonance control circuit and electromagnetic heating device - Google Patents
Resonance control circuit and electromagnetic heating device Download PDFInfo
- Publication number
- CN103596307A CN103596307A CN201310545663.7A CN201310545663A CN103596307A CN 103596307 A CN103596307 A CN 103596307A CN 201310545663 A CN201310545663 A CN 201310545663A CN 103596307 A CN103596307 A CN 103596307A
- Authority
- CN
- China
- Prior art keywords
- circuit
- resonant
- resonant circuit
- voltage
- control 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.)
- Granted
Links
Images
Landscapes
- Dc-Dc Converters (AREA)
- Inverter Devices (AREA)
Abstract
The invention provides a resonance control circuit and an electromagnetic heating device. The resonance control circuit comprises a power source module, a voltage sampling circuit, a first resonance circuit, a second resonance circuit, a control circuit and a controller. The voltage sampling circuit is used for sampling voltage in the power source module so that the sampled voltage can be obtained; the control circuit is used for controlling the first resonance circuit or the second resonance circuit to be connected with the power source module so that resonance of the first resonance circuit or the second resonance circuit can be achieved; the controller is respectively connected with an output end of the voltage sampling circuit and an input end of the control circuit and used for sending a control signal to the control circuit according to the relationship between the sampled voltage and the preset voltage value. According to the technical scheme, resonance of a circuit is achieved through the different resonance circuits, and therefore it is guaranteed that the electromagnetic heating device can achieve high-power output at high voltage and low voltage.
Description
Technical field
The present invention relates to have the technical field of electric appliances of electromagnetic induction, in particular to a kind of resonant control circuit and a kind of electromagnetic heater.
Background technology
At present, Household induction cooker is generally designed to single coil, even if there is the electromagnetic oven of multi-coil, is only also in order to reach the object of different heating area, cannot meet under high and low pressure condition and automatically switch, also just cannot realize under high and low pressure, all export high-power.
Therefore, how to guarantee that electromagnetic heater can realize high-power heating under high and low pressure, become technical problem urgently to be resolved hurrily at present.
Summary of the invention
The present invention is intended at least solve one of technical problem existing in prior art or correlation technique.
For this reason, one object of the present invention is to have proposed a kind ofly can guarantee, under high and low pressure condition, can realize the resonant control circuit of high-power output.
Another object of the present invention is to have proposed a kind of electromagnetic heater.
For achieving the above object, embodiment according to a first aspect of the invention, has proposed a kind of resonant control circuit, comprising: power module; Voltage sampling circuit, samples for the voltage to described power module, to obtain sampled voltage; The first resonant circuit; The second resonant circuit; Control circuit, for controlling described the first resonant circuit or described the second resonant circuit is connected with described power module, to realize the resonance of the first resonant circuit or the second resonant circuit; Controller, is connected to respectively the output of described voltage sampling circuit and the input of described control circuit, for transmitting control signal to described control circuit according to the relation of described sampled voltage and predeterminated voltage value.
Resonant control circuit according to an embodiment of the invention, by voltage sampling circuit, the voltage in power module is sampled, controller can be transmitted control signal according to the relation of sampled voltage and predeterminated voltage value, to control the resonant circuit of realizing resonance to control circuit.Such as, can be when sampled voltage be more than or equal to predeterminated voltage value, can realize by the first resonant circuit the resonance of circuit, when sampled voltage is less than predeterminated voltage value, can realizes by the second resonant circuit the resonance of circuit, thereby guarantee under high and low pressure condition, can realize resonance by different resonant circuits, when the inductance value of the first resonant circuit coil is greater than the inductance value of the second resonant circuit coil, can guarantee, under high and low pressure, can realize high-power output.
In addition, resonant control circuit according to the above embodiment of the present invention, can also have following additional technical characterictic:
According to one embodiment of present invention, described power module, comprising: rectification circuit, is connected to AC power; Filter circuit, is connected in series with described rectification circuit; The input of described voltage sampling circuit is connected between described AC power and the input of described rectification circuit, between the output of described rectification circuit and the input of described filter circuit or between the output of described filter circuit and the input of described resonant circuit, so that the voltage in described power module is sampled.
Resonant control circuit according to an embodiment of the invention, power module is to be composed in series by rectification circuit and filter circuit, when power module is carried out to voltage sample, can sample at the input of rectification circuit, be between AC power and the input of rectification circuit, also can sample at the output of rectification circuit, be between the output of rectification circuit and the input of filter circuit, can also sample at the output of filter circuit, between the output of filter circuit and the input of resonant circuit.
According to one embodiment of present invention, described voltage sampling circuit comprises: rectifier cell; And at least one sectional pressure element, be connected in series with described rectifier cell.Wherein, described sectional pressure element comprises single resistance, or connects and/or a plurality of resistance in parallel.
Resonant control circuit according to an embodiment of the invention, because rectification circuit is connected to AC power, and voltage after over commutation and/or filtering are processed also may have alternating component, therefore can on voltage sampling circuit, increase rectifier cell, such as diode etc., certainly, also can in sample circuit, increase rectification circuit, thereby the AC portion in filtering voltage, to sample.
According to one embodiment of present invention, described control circuit is when described sampled voltage is more than or equal to described predeterminated voltage value, controlling described the first resonant circuit is connected with described power module, when described sampled voltage is less than described predeterminated voltage value, controls described the second resonant circuit and be connected with described power module.
Resonant control circuit according to an embodiment of the invention, when being more than or equal to predeterminated voltage value at sampled voltage, by the first resonant circuit, realized the resonance of circuit, when sampled voltage is less than predeterminated voltage value, by the second resonant circuit, realized the resonance of circuit, thereby guaranteed under high and low pressure condition, can realize high-power output by different resonant circuits.
According to one embodiment of present invention, the inductance value of the resonance coil in described the first resonant circuit is greater than the inductance value of the resonance coil in described the second resonant circuit.
Resonant control circuit according to an embodiment of the invention, by making the inductance value of the resonance coil in the first resonant circuit be greater than the inductance value of the resonance coil in the second resonant circuit, guaranteed when sampled voltage is more than or equal to predeterminated voltage value, or when sampled voltage is less than predeterminated voltage value, can both realize the high-power output of resonant circuit.
According to one embodiment of present invention, also comprise: the first synchronized sampling circuit, the first input end of described the first synchronized sampling circuit is connected to the first end of described the first resonant circuit, the second input of described the first synchronized sampling circuit is connected to the second end of described the first resonant circuit, with when described the first resonant circuit is realized the resonance of circuit, the voltage at described the first resonant circuit two ends is sampled; The second synchronized sampling circuit, the first input end of described the second synchronized sampling circuit is connected to the first end of described the second resonant circuit, the second input of described the second synchronized sampling circuit is connected to the second end of described the second resonant circuit, with when described the second resonant circuit is realized the resonance of circuit, the voltage at described the second resonant circuit two ends is sampled; Power tube, the first end of described power tube is connected to respectively the first end of described the first resonant circuit and the first end of described the second resonant circuit, the second end ground connection of described power tube; Described controller, be connected to respectively the output of described the first synchronized sampling circuit and the output of described the second synchronized sampling circuit, and the control end of described power tube, be used for according to the sampled result of described the first synchronized sampling circuit or described the second synchronized sampling circuit, to described power tube, transmit control signal, so that the operating state of described the first resonant circuit or described the second resonant circuit is controlled.
Resonant control circuit according to an embodiment of the invention, by two synchronized sampling circuit are set, to gather respectively the voltage at the first resonant circuit and the second resonant circuit two ends, make when realizing the resonance of circuit by different resonant circuits, the voltage difference that can both guarantee sampled voltage, in normal scope, is avoided the risk that extremely causes resonant circuit to work of voltage difference.
According to one embodiment of present invention, described the first resonant circuit comprises: the first coil; And first electric capacity, be connected in parallel with described the first coil; Described the second resonant circuit comprises: the second coil; And second electric capacity, be connected with described the second coils from parallel connection of coils; Described control circuit can control the second end of described the first resonant circuit or the second end of described the second resonant circuit is connected with described power module.
Resonant control circuit according to an embodiment of the invention, the first resonant circuit and the second resonant circuit have common port, the one end being connected with power tube respectively, can control the second end of the first resonant circuit or the second end of the second resonant circuit is connected with power module by control circuit, to form corresponding resonant circuit, realize the resonance of circuit.
According to one embodiment of present invention, also comprise: relay, the first end of described relay is connected to described power module, the control end of described relay is connected to the output of described control circuit, when described sampled voltage is more than or equal to described predeterminated voltage value, the second end of described relay controlled by described control circuit and the second end of described the first resonant circuit is communicated with, to realize the resonance of described the first resonant circuit, when described sampled voltage is less than described predeterminated voltage value, the second end of described relay controlled by described control circuit and the second end of described the second resonant circuit is communicated with, to realize the resonance of described the second resonant circuit.
Resonant control circuit according to an embodiment of the invention, specifically, relay can be electromagnetic relay, the second end of the first resonant circuit can be connected with the normally-closed contact of electromagnetic relay, the second end of the second resonant circuit is connected with the normally opened contact of electromagnetic relay, make when sampled voltage is more than or equal to predeterminated voltage value, can realize by the first resonant circuit the resonance of circuit, and when sampled voltage is less than predeterminated voltage value, by control circuit, controlling electromagnetic relay switches on, to be communicated with moving contact and normally opened contact, thereby by the second resonant circuit, realize the resonance of circuit.Certainly, also the second end of the first resonant circuit can be connected with the normally opened contact of electromagnetic relay, the second end of the second resonant circuit is connected with the normally-closed contact of electromagnetic relay, when sampled voltage is more than or equal to predeterminated voltage value, control circuit is controlled electromagnetic relay energising, to realize the resonance of the first resonant circuit.When sampled voltage is less than predeterminated voltage value, by control circuit, control electromagnetic relay no power, to be communicated with moving contact and normally-closed contact, thereby by the second resonant circuit, realize the resonance of circuit.
According to one embodiment of present invention, described the first resonant circuit and described the second resonant circuit have public capacitance, and the first end of described public capacitance is connected to the first end of described power tube, and the second end of described public capacitance is connected to described power module; Described the first resonant circuit, also comprises: the first coil, and the first end of described the first coil is connected to the first end of described public capacitance; Described the second resonant circuit, also comprises: the second coil, and the first end of described the second coil is connected to the first end of described public capacitance; Described control circuit can be controlled the second end that the second end of described the first coil or the second end of described the second coil are connected to described public capacitance.
Resonant control circuit according to an embodiment of the invention, the first resonant circuit and the second resonant circuit can share a public capacitance, thereby save the components and parts of circuit, and control the second end of the first coil or the second end of the second coil is connected with power module (being the second end of public capacitance) by control circuit, to form corresponding resonant circuit, realize the resonance of circuit.
According to one embodiment of present invention, also comprise: relay, the first end of described relay is connected to the second end of described public capacitance, the control end of described relay is connected to the output of described control circuit, when described sampled voltage is more than or equal to described predeterminated voltage value, the second end of described relay controlled by described control circuit and the second end of described the first coil is communicated with, to realize the resonance of described the first resonant circuit, when described sampled voltage is less than described predeterminated voltage value, the second end of described relay controlled by described control circuit and the second end of described the second coil is communicated with, to realize the resonance of described the second resonant circuit.
Resonant control circuit according to an embodiment of the invention, specifically, relay can be electromagnetic relay, the second end of the first coil can be connected with the normally-closed contact of electromagnetic relay, the second end of the second coil is connected with the normally opened contact of electromagnetic relay, make when sampled voltage is more than or equal to predeterminated voltage value, can form the resonance that the first resonant circuit is realized circuit by the first coil and public capacitance, and when sampled voltage is less than predeterminated voltage value, by control circuit, controlling electromagnetic relay switches on, to be communicated with moving contact and normally opened contact, thereby can form the resonance that the second resonant circuit is realized circuit by the second coil and public capacitance.Certainly, also the second end of the first coil can be connected with the normally opened contact of electromagnetic relay, the second end of the second coil is connected with the normally-closed contact of electromagnetic relay, when sampled voltage is more than or equal to predeterminated voltage value, control circuit is controlled electromagnetic relay energising, to realize the resonance of the first resonant circuit.When sampled voltage is less than predeterminated voltage value, by control circuit, control electromagnetic relay no power, to be communicated with moving contact and normally-closed contact, thereby by the second resonant circuit, realize the resonance of circuit.
According to one embodiment of present invention, described synchronized sampling circuit comprises: a plurality of sectional pressure elements that are connected in series; Wherein, described sectional pressure element comprises single resistance, or connects and/or a plurality of resistance in parallel.
According to the embodiment of second aspect present invention, propose a kind of electromagnetic heater, comprised the resonant control circuit described in above-mentioned arbitrary embodiment.
Electromagnetic heater according to an embodiment of the invention, by voltage sampling circuit, the voltage in power module is sampled, make when sampled voltage is more than or equal to predeterminated voltage value, can realize by the first resonant circuit the resonance of circuit, when sampled voltage is less than predeterminated voltage value, can realize by the second resonant circuit the resonance of circuit, thereby guaranteed at height, under low pressure condition, can realize resonance by different resonant circuits, when the inductance value of the first resonant circuit coil is greater than the inductance value of the second resonant circuit coil, can guarantee at height, under low pressure, can realize high-power output.
Electromagnetic heater can be electric cooker, electromagnetic oven, and electric pressure cooker etc.
Additional aspect of the present invention and advantage in the following description part provide, and part will become obviously from the following description, or recognize by practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present invention and advantage accompanying drawing below combination obviously and is easily understood becoming the description of embodiment, wherein:
Fig. 1 shows the schematic block diagram of resonant control circuit according to an embodiment of the invention;
Fig. 2 A shows the structural representation of resonant circuit according to an embodiment of the invention;
Fig. 2 B shows the structural representation of resonant circuit according to another embodiment of the invention;
Fig. 3 shows the electrical block diagram of resonant control circuit according to an embodiment of the invention.
Embodiment
In order more clearly to understand above-mentioned purpose of the present invention, feature and advantage, below in conjunction with the drawings and specific embodiments, the present invention is further described in detail.It should be noted that, in the situation that not conflicting, the application's embodiment and the feature in embodiment can combine mutually.
A lot of details have been set forth in the following description so that fully understand the present invention; but; the present invention can also adopt other to be different from other modes described here and implement, and therefore, protection scope of the present invention is not subject to the restriction of following public specific embodiment.
Fig. 1 shows the schematic block diagram of resonant control circuit according to an embodiment of the invention.
As shown in Figure 1, resonant control circuit 100 according to an embodiment of the invention, comprising: power module 102; Voltage sampling circuit 104, for sampling to the voltage of described power module 102, to obtain sampled voltage; The first resonant circuit 106; The second resonant circuit 108; Control circuit 114, for controlling described the first resonant circuit 106 or described the second resonant circuit 108 is connected with described power module 102, to realize the resonance of the first resonant circuit 106 or the second resonant circuit 108; Controller 116, is connected to respectively the output (not shown annexation) of described voltage sampling circuit and the input of described control circuit, for transmitting control signal to described control circuit according to the relation of described sampled voltage and predeterminated voltage value.
By the voltage in 104 pairs of power modules 102 of voltage sampling circuit, sample, controller 116 can be transmitted control signal according to the relation of sampled voltage and predeterminated voltage value, to control the resonant circuit of realizing resonance to control circuit 114.Such as, can be when sampled voltage be more than or equal to predeterminated voltage value, can realize by the first resonant circuit 106 resonance of circuit, when sampled voltage is less than predeterminated voltage value, can realize by the second resonant circuit 108 resonance of circuit, thereby guaranteed under high and low pressure condition, can realize resonance by different resonant circuits, when the inductance value of the first resonant circuit 106 coils is greater than the inductance value of the second resonant circuit 108 coils, can guarantee, under high and low pressure, can realize high-power output.
In addition, resonant control circuit according to the above embodiment of the present invention, can also have following additional technical characterictic:
According to one embodiment of present invention, described power module 102, comprising: rectification circuit 1022, is connected to AC power; Filter circuit 1024, is connected in series with described rectification circuit 1022; The input of described voltage sampling circuit 104 is connected between described AC power and the input of described rectification circuit 1022, between the output of described rectification circuit 1022 and the input of described filter circuit 1024 or between the output of described filter circuit 1024 and the input of described resonant circuit (can be the first resonant circuit 106 shown in figure or the second resonant circuit 108) (not shown annexation), so that the voltage in described power module 102 is sampled.
Power module 102 is to be composed in series by rectification circuit 1022 and filter circuit 1024, when power module 102 is carried out to voltage sample, can sample at the input of rectification circuit 1022, be between AC power and the input of rectification circuit 1022, also can sample at the output of rectification circuit 1022, be between the output of rectification circuit 1022 and the input of filter circuit 1024, can also sample at the output of filter circuit 1024, between the output of filter circuit 1024 and the input of resonant circuit.
According to one embodiment of present invention, described voltage sampling circuit 104 comprises: rectifier cell; And at least one sectional pressure element, be connected in series with described rectifier cell.Wherein, described sectional pressure element comprises single resistance, or connects and/or a plurality of resistance in parallel.
Because rectification circuit 1022 is connected to AC power, and voltage after over commutation and/or filtering are processed also may have alternating component, therefore can on voltage sampling circuit, increase rectifier cell, such as diode etc., certainly, also can in voltage sampling circuit 104, increase rectification circuit, thus the AC portion in filtering voltage, to carry out voltage sample.
According to one embodiment of present invention, described control circuit 114 is when described sampled voltage is more than or equal to described predeterminated voltage value, controlling described the first resonant circuit 106 is connected with described power module 102, when described sampled voltage is less than described predeterminated voltage value, controls described the second resonant circuit 108 and be connected with described power module 102.
When being more than or equal to predeterminated voltage value at sampled voltage, by the first resonant circuit 106, realized the resonance of circuit, when sampled voltage is less than predeterminated voltage value, by the second resonant circuit 108, realized the resonance of circuit, thereby guaranteed under high and low pressure condition, can realize high-power output by different resonant circuits.
According to one embodiment of present invention, the inductance value of the resonance coil in described the first resonant circuit 106 is greater than the inductance value of the resonance coil in described the second resonant circuit 108.
By making the inductance value of the resonance coil in the first resonant circuit 106 be greater than the inductance value of the resonance coil in the second resonant circuit 108, guaranteed when sampled voltage is more than or equal to predeterminated voltage value, or when sampled voltage is less than predeterminated voltage value, can both realize the high-power output of resonant circuit.
According to one embodiment of present invention, also comprise: the first synchronized sampling circuit 110, the first input end of described the first synchronized sampling circuit 110 is connected to the first end of described the first resonant circuit 106, the second input of described the first synchronized sampling circuit 110 is connected to the second end of described the first resonant circuit 106, with when described the first resonant circuit 106 is realized the resonance of circuit, the voltage at described the first resonant circuit 106 two ends is sampled; The second synchronized sampling circuit 112, the first input end of described the second synchronized sampling circuit 112 is connected to the first end of described the second resonant circuit 108, the second input of described the second synchronized sampling circuit 112 is connected to the second end of described the second resonant circuit 108, with when described the second resonant circuit 108 is realized the resonance of circuit, the voltage at described the second resonant circuit 108 two ends is sampled; Power tube (not shown), the first end of described power tube is connected to respectively the first end of described the first resonant circuit and the first end of described the second resonant circuit, the second end ground connection of described power tube; Described controller 116, be connected to respectively the output of described the first synchronized sampling circuit 110 and the output of described the second synchronized sampling circuit 112, and the control end of described power tube, be used for according to the sampled result of described the first synchronized sampling circuit 110 or described the second synchronized sampling circuit 112, to described power tube, transmit control signal, so that the operating state of described the first resonant circuit 106 or described the second resonant circuit 108 is controlled.
By two synchronized sampling circuit are set, to gather respectively the voltage at the first resonant circuit 106 and the second resonant circuit 108 two ends, make when realizing the resonance of circuit by different resonant circuits, the voltage difference that can both guarantee sampled voltage, in normal scope, is avoided the risk that extremely causes resonant circuit to work of voltage difference.
The composition of the first resonant circuit 106 and the second resonant circuit 108, and the control mode of 114 pairs of the first resonant circuits 106 of control circuit and the second resonant circuit 108 can have following two kinds of execution modes:
Execution mode one
As shown in Figure 2 A, the first resonant circuit 106 shown in Fig. 1 comprises: the first coil 202; And first electric capacity 204, be connected in parallel with described the first coil 202; The second resonant circuit 108 shown in Fig. 1 comprises: the second coil 206; And second electric capacity 208, be connected in parallel with described the second coil 206; The first end of described the first resonant circuit 106 is all connected with transistor 216 with the first end of described the second resonant circuit 108, and the control circuit 114 shown in second end ground connection Fig. 1 of transistor 216 can control the second end of described the first resonant circuit 106 or the second end of described the second resonant circuit 108 is connected with described power module.
Resonant control circuit according to an embodiment of the invention, the first resonant circuit 106 and the second resonant circuit 108 have common port, the one end being connected with power tube 216 respectively, can be connected with power module by control circuit 114 control the second ends of the first resonant circuit 106 or the second end of the second resonant circuit 108, to form corresponding resonant circuit, realize the resonance of circuit.
When the control circuit 114 shown in Fig. 1 is controlled, can be by controlling electromagnetic relay to control the resonant circuit of place in circuit, specifically, as shown in Figure 2 A, the moving contact 214 of electromagnetic relay is connected to the described power module 102 shown in Fig. 1, the normally-closed contact 210 of described electromagnetic relay is connected to the second end of described the first resonant circuit 106, the normally opened contact 212 of described electromagnetic relay is connected to the second end of described the second resonant circuit 108, when described sampled voltage is more than or equal to described predeterminated voltage value, described control circuit 114 is controlled described electromagnetic relay no power, to realize the resonance of described the first resonant circuit 106, when described sampled voltage is less than described predeterminated voltage value, described control circuit 114 is controlled described electromagnetic relay energising, to realize the resonance of described the second resonant circuit 108.
Certainly, also the second end of the first resonant circuit 106 can be connected with the normally opened contact 212 of electromagnetic relay, the second end of the second resonant circuit 108 is connected with the normally-closed contact 210 of electromagnetic relay, when sampled voltage is more than or equal to predeterminated voltage value, control circuit 114 is controlled electromagnetic relay energising, to realize the resonance of the first resonant circuit 106.When sampled voltage is less than predeterminated voltage value, by control circuit 114, control electromagnetic relay no power, to be communicated with moving contact 214 and normally-closed contact 210, thereby by the second resonant circuit 108, realize the resonance of circuit.
Execution mode two
As shown in Figure 2 B, in first resonant circuit 106(Fig. 2 B, do not mark) with described second resonant circuit 108(Fig. 2 B in do not mark) there is public capacitance 216, the first end of described public capacitance 216 is connected to the first end of described power tube 216, the second end ground connection of described transistor 216, the second end of described public capacitance 216 is connected to described power module 102; Described the first resonant circuit 106, also comprises: the first coil 202, and the first end of described the first coil 202 is connected to the first end of described public capacitance 216; Described the second resonant circuit 108, also comprises: the second coil 206, and the first end of described the second coil 206 is connected to the first end of described public capacitance 216; Described control circuit 114 can be controlled the second end that the second end of described the first coil 202 or the second end of described the second coil 206 are connected to described resonant capacitance.
Resonant control circuit according to an embodiment of the invention, the first resonant circuit 106 and the second resonant circuit 108 can share a public capacitance 216, thereby save the components and parts of circuit, and be connected with power module (being the second end of public capacitance) by control circuit 114 control the second ends of the first coil 202 or the second end of the second coil 206, to form corresponding resonant circuit, realize the resonance of circuit.
When the control circuit 114 shown in Fig. 1 is controlled, can be by controlling electromagnetic relay to control the resonant circuit of place in circuit, specifically, as shown in Figure 2 B, the moving contact 214 of electromagnetic relay (not shown in Fig. 2 B) is connected to the second end of described public capacitance 216, the normally-closed contact 210 of described electromagnetic relay is connected to the second end of described the first coil 202, the normally opened contact 212 of described electromagnetic relay is connected to the second end of described the second coil 206, when described sampled voltage is more than or equal to described predeterminated voltage value, described control circuit 114 is controlled described electromagnetic relay no power, described the first coil 202 and described public capacitance 216 are realized the resonance of described the first resonant circuit 106, when described sampled voltage is less than described predeterminated voltage value, described control circuit 114 is controlled described electromagnetic relay energising, described the second coil 206 and described public capacitance 216 are realized the resonance of described the second resonant circuit 108.
Certainly, also the second end of the first coil 202 can be connected with the normally opened contact 212 of electromagnetic relay, the second end of the second coil 206 is connected with the normally-closed contact 210 of electromagnetic relay, when sampled voltage is more than or equal to predeterminated voltage value, control circuit 114 is controlled electromagnetic relay energising, to realize the resonance of the first resonant circuit 106.When sampled voltage is less than predeterminated voltage value, by control circuit 114, control electromagnetic relay no power, to be communicated with moving contact 214 and normally-closed contact 210, thereby by the second resonant circuit 108, realize the resonance of circuit.
Fig. 3 shows the schematic diagram of resonant control circuit according to an embodiment of the invention.
As shown in Figure 3, resonant control circuit according to an embodiment of the invention, wherein, rectification circuit 1022, filter circuit 1024 and resonant circuit 306 are connected in series, rectification circuit 1022 is connected to AC power, voltage sampling circuit 104 is for the input terminal voltage to collection rectification circuit 1022, certainly, the input of voltage sampling circuit 104 also can be connected between the output and filter circuit 1024 of rectification circuit 1022, or between the output of filter circuit 1024 and the input of resonant circuit 306.
Because rectification circuit 1022 is connected to AC power, and voltage after over commutation and/or filtering are processed also may have alternating component, therefore can on voltage sampling circuit 104, increase rectifier cell, rectifier cell can be the diode 308 shown in Fig. 3 etc., certainly, also can in sample circuit, increase rectification circuit, thus the AC portion in filtering voltage, to sample.
The voltage of 104 pairs of power modules of voltage sampling circuit is sampled, and sampled voltage is sent to the controller 116 shown in Fig. 1, and wherein, voltage module comprises rectification circuit 1022 and filter circuit 1024.When the sampled voltage of voltage sampling circuit 104 is more than or equal to predeterminated voltage value, the collector electrode of the triode switch 304 in control circuit 114 and not conducting of emitter, electromagnetic relay is not worked, and the first coil 202 forms with public capacitance 216 resonance that resonant circuit is realized circuit.
When the sampled voltage of voltage sampling circuit 104 is less than predeterminated voltage value, controller 116 transmits control signal to control circuit 114, so that the collector electrode of triode switch 304 and emitter conducting, electromagnetic relay work, moving contact 214 is connected with normally opened contact 212, and the second coil 206 forms with public capacitance 216 resonance that resonant circuit is realized circuit.The inductance value of the first coil 202 can be greater than the inductance value of the second coil 206, thereby makes when high and low pressure, can realize the high-power output of circuit.
Owing to being provided with two coils, with at height, during low pressure, by different coils and public capacitance 216, form resonant circuit respectively, therefore in order to guarantee when two resonant circuits are realized respectively the resonance of circuit, the voltage difference of the voltage that synchronized sampling circuit 312 samples is in normal scope, need for each resonant circuit, different synchronized sampling circuit to be set respectively, as shown in Figure 3, resistance R 4, R5 and R6 have formed the first input end of the first synchronized sampling circuit, resistance R 7, R8 and R9 have formed the second input of the first synchronized sampling circuit, resistance R 1, R2 and R3 have formed the first input end of the second synchronized sampling circuit, the second synchronized sampling circuit and the first synchronized sampling circuit have shared second input.Synchronized sampling circuit 312 is sent in the controller 116(Fig. 3 shown in Fig. 1 not shown by the voltage difference at the resonant circuit two ends that collect) so that controller 116 transmits control signal to transistor 314, to control the operating state of resonant circuit 306.Between controller 116 and transistor 314, drive circuit 316 can also be set, with driving transistors 314, carry out work.
Resistive element in synchronized sampling circuit can be single resistance, can be also to connect and/or a plurality of resistance in parallel.
More than be described with reference to the accompanying drawings technical scheme of the present invention, by technical scheme of the present invention, can have realized by different resonant circuits the resonance of circuit, thereby guaranteed that electromagnetic heater can realize high-power output under high and low pressure.Simultaneously, two synchronized sampling circuit are set, to gather respectively the voltage at different resonant circuits two ends, make when realizing the resonance of circuit by different resonant circuits, the voltage difference that can both guarantee sampled voltage, in normal scope, is avoided the risk that extremely causes resonant circuit to work of voltage difference.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (12)
1. a resonant control circuit, is characterized in that, comprising:
Power module;
Voltage sampling circuit, samples for the voltage to described power module, to obtain sampled voltage;
The first resonant circuit;
The second resonant circuit;
Control circuit, for controlling described the first resonant circuit or described the second resonant circuit is connected with described power module, to realize the resonance of the first resonant circuit or the second resonant circuit;
Controller, is connected to respectively the output of described voltage sampling circuit and the input of described control circuit, for transmitting control signal to described control circuit according to the relation of described sampled voltage and predeterminated voltage value.
2. resonant control circuit according to claim 1, is characterized in that, described power module, comprising:
Rectification circuit, is connected to AC power;
Filter circuit, is connected in series with described rectification circuit;
The input of described voltage sampling circuit is connected between described AC power and the input of described rectification circuit, between the output of described rectification circuit and the input of described filter circuit or between the output of described filter circuit and the input of described resonant circuit, so that the voltage in described power module is sampled.
3. resonant control circuit according to claim 1, is characterized in that, described voltage sampling circuit comprises:
Rectifier cell; And
At least one sectional pressure element, is connected in series with described rectifier cell.
4. resonant control circuit according to claim 1, it is characterized in that, described control circuit is when described sampled voltage is more than or equal to described predeterminated voltage value, controlling described the first resonant circuit is connected with described power module, when described sampled voltage is less than described predeterminated voltage value, controls described the second resonant circuit and be connected with described power module.
5. resonant control circuit according to claim 4, is characterized in that, the inductance value of the resonance coil in described the first resonant circuit is greater than the inductance value of the resonance coil in described the second resonant circuit.
6. resonant control circuit according to claim 1, is characterized in that, also comprises:
The first synchronized sampling circuit, the first input end of described the first synchronized sampling circuit is connected to the first end of described the first resonant circuit, the second input of described the first synchronized sampling circuit is connected to the second end of described the first resonant circuit, with when described the first resonant circuit is realized the resonance of circuit, the voltage at described the first resonant circuit two ends is sampled;
The second synchronized sampling circuit, the first input end of described the second synchronized sampling circuit is connected to the first end of described the second resonant circuit, the second input of described the second synchronized sampling circuit is connected to the second end of described the second resonant circuit, with when described the second resonant circuit is realized the resonance of circuit, the voltage at described the second resonant circuit two ends is sampled;
Power tube, the first end of described power tube is connected to respectively the first end of described the first resonant circuit and the first end of described the second resonant circuit, the second end ground connection of described power tube;
Described controller, be connected to respectively the output of described the first synchronized sampling circuit and the output of described the second synchronized sampling circuit, and the control end of described power tube, be used for according to the sampled result of described the first synchronized sampling circuit or described the second synchronized sampling circuit, to described power tube, transmit control signal, so that the operating state of described the first resonant circuit or described the second resonant circuit is controlled.
7. resonant control circuit according to claim 6, is characterized in that, described the first resonant circuit comprises:
The first coil; And
The first electric capacity, is connected in parallel with described the first coil;
Described the second resonant circuit comprises:
The second coil; And
The second electric capacity, is connected in parallel with described the second coil;
Described control circuit can control the second end of described the first resonant circuit or the second end of described the second resonant circuit is connected with described power module.
8. resonant control circuit according to claim 7, is characterized in that, also comprises:
Relay, the first end of described relay is connected to described power module, the control end of described relay is connected to the output of described control circuit, when described sampled voltage is more than or equal to described predeterminated voltage value, the second end of described relay controlled by described control circuit and the second end of described the first resonant circuit is communicated with, to realize the resonance of described the first resonant circuit, when described sampled voltage is less than described predeterminated voltage value, the second end of described relay controlled by described control circuit and the second end of described the second resonant circuit is communicated with, to realize the resonance of described the second resonant circuit.
9. resonant control circuit according to claim 6, it is characterized in that, described the first resonant circuit and described the second resonant circuit have public capacitance, and the first end of described public capacitance is connected to the first end of described power tube, and the second end of described public capacitance is connected to described power module;
Described the first resonant circuit, also comprises:
The first coil, the first end of described the first coil is connected to the first end of described public capacitance;
Described the second resonant circuit, also comprises:
The second coil, the first end of described the second coil is connected to the first end of described public capacitance;
Described control circuit can be controlled the second end that the second end of described the first coil or the second end of described the second coil are connected to described public capacitance.
10. resonant control circuit according to claim 9, is characterized in that, also comprises:
Relay, the first end of described relay is connected to the second end of described public capacitance, the control end of described relay is connected to the output of described control circuit, when described sampled voltage is more than or equal to described predeterminated voltage value, the second end of described relay controlled by described control circuit and the second end of described the first coil is communicated with, to realize the resonance of described the first resonant circuit, when described sampled voltage is less than described predeterminated voltage value, the second end of described relay controlled by described control circuit and the second end of described the second coil is communicated with, to realize the resonance of described the second resonant circuit.
11. according to the resonant control circuit described in any one in claim 6 to 10, it is characterized in that, described synchronized sampling circuit comprises: a plurality of sectional pressure elements that are connected in series;
Wherein, described sectional pressure element comprises single resistance, or connects and/or a plurality of resistance in parallel.
12. 1 kinds of electromagnetic heaters, is characterized in that, comprise the resonant control circuit described in any one in claim 1 to 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310545663.7A CN103596307B (en) | 2013-11-05 | 2013-11-05 | Resonant control circuit and electromagnetic heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310545663.7A CN103596307B (en) | 2013-11-05 | 2013-11-05 | Resonant control circuit and electromagnetic heater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103596307A true CN103596307A (en) | 2014-02-19 |
| CN103596307B CN103596307B (en) | 2015-10-14 |
Family
ID=50086234
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310545663.7A Active CN103596307B (en) | 2013-11-05 | 2013-11-05 | Resonant control circuit and electromagnetic heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103596307B (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104214804A (en) * | 2014-09-15 | 2014-12-17 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating device and cookware detecting method thereof |
| WO2016095394A1 (en) * | 2014-12-17 | 2016-06-23 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic resonant circuit, and control method and control system thereof |
| CN107690207A (en) * | 2016-08-04 | 2018-02-13 | 佛山市顺德区美的电热电器制造有限公司 | Electric cooker |
| CN108882421A (en) * | 2017-05-11 | 2018-11-23 | 佛山市顺德区美的电热电器制造有限公司 | Method for heating and controlling, heating control apparatus and electromagnetic heating apparatus |
| CN109945247A (en) * | 2017-12-21 | 2019-06-28 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic cooking appliance and its Poewr control method |
| CN109945248A (en) * | 2017-12-21 | 2019-06-28 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic cooking appliance and its Poewr control method |
| WO2019192157A1 (en) * | 2018-04-03 | 2019-10-10 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetically heated cooking utensil, and heating control circuit and method therefor |
| US10605464B2 (en) | 2012-10-15 | 2020-03-31 | Whirlpool Corporation | Induction cooktop |
| US10893579B2 (en) | 2017-07-18 | 2021-01-12 | Whirlpool Corporation | Method for operating an induction cooking hob and cooking hob using such method |
| US10993292B2 (en) | 2017-10-23 | 2021-04-27 | Whirlpool Corporation | System and method for tuning an induction circuit |
| US11140751B2 (en) | 2018-04-23 | 2021-10-05 | Whirlpool Corporation | System and method for controlling quasi-resonant induction heating devices |
| US11212880B2 (en) | 2012-10-15 | 2021-12-28 | Whirlpool Emea S.P.A. | Induction cooking top |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001196156A (en) * | 2000-01-12 | 2001-07-19 | Hitachi Hometec Ltd | Induction cooker |
| EP0926926B1 (en) * | 1997-12-23 | 2006-11-02 | Brandt Industries | Device for supplying a plurality of resonant circuits by means of an inverter type power generator |
| EP1194008B1 (en) * | 2000-09-29 | 2010-01-20 | BSH Bosch und Siemens Hausgeräte GmbH | Inverter circuit and its method of controlling |
| US20100206867A1 (en) * | 2007-10-31 | 2010-08-19 | BSH Bosch und Siemens Hausgeräte GmbH | Cooking device |
| CN101909375A (en) * | 2009-06-08 | 2010-12-08 | 深圳市鑫汇科科技有限公司 | High-power electromagnetic oven circuit based on SoC (System On Chip) chip |
| CN202761034U (en) * | 2012-06-28 | 2013-03-06 | 九阳股份有限公司 | Intelligent food processing machine |
| CN202840661U (en) * | 2012-09-20 | 2013-03-27 | 深圳市鑫汇科电子有限公司 | Low standby power consumption electromagnetic oven circuit |
| CN203136220U (en) * | 2013-02-21 | 2013-08-14 | 美的集团股份有限公司 | Electromagnetic heating device |
| CN203661321U (en) * | 2013-11-05 | 2014-06-18 | 美的集团股份有限公司 | Resonance control circuit and electromagnetic heating device |
-
2013
- 2013-11-05 CN CN201310545663.7A patent/CN103596307B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0926926B1 (en) * | 1997-12-23 | 2006-11-02 | Brandt Industries | Device for supplying a plurality of resonant circuits by means of an inverter type power generator |
| JP2001196156A (en) * | 2000-01-12 | 2001-07-19 | Hitachi Hometec Ltd | Induction cooker |
| EP1194008B1 (en) * | 2000-09-29 | 2010-01-20 | BSH Bosch und Siemens Hausgeräte GmbH | Inverter circuit and its method of controlling |
| US20100206867A1 (en) * | 2007-10-31 | 2010-08-19 | BSH Bosch und Siemens Hausgeräte GmbH | Cooking device |
| CN101909375A (en) * | 2009-06-08 | 2010-12-08 | 深圳市鑫汇科科技有限公司 | High-power electromagnetic oven circuit based on SoC (System On Chip) chip |
| CN202761034U (en) * | 2012-06-28 | 2013-03-06 | 九阳股份有限公司 | Intelligent food processing machine |
| CN202840661U (en) * | 2012-09-20 | 2013-03-27 | 深圳市鑫汇科电子有限公司 | Low standby power consumption electromagnetic oven circuit |
| CN203136220U (en) * | 2013-02-21 | 2013-08-14 | 美的集团股份有限公司 | Electromagnetic heating device |
| CN203661321U (en) * | 2013-11-05 | 2014-06-18 | 美的集团股份有限公司 | Resonance control circuit and electromagnetic heating device |
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10605464B2 (en) | 2012-10-15 | 2020-03-31 | Whirlpool Corporation | Induction cooktop |
| US11655984B2 (en) | 2012-10-15 | 2023-05-23 | Whirlpool Corporation | Induction cooktop |
| US11212880B2 (en) | 2012-10-15 | 2021-12-28 | Whirlpool Emea S.P.A. | Induction cooking top |
| CN104214804A (en) * | 2014-09-15 | 2014-12-17 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating device and cookware detecting method thereof |
| WO2016095394A1 (en) * | 2014-12-17 | 2016-06-23 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic resonant circuit, and control method and control system thereof |
| CN105790546A (en) * | 2014-12-17 | 2016-07-20 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic resonance circuit and control method and control system thereof |
| CN105790546B (en) * | 2014-12-17 | 2018-09-04 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic resonant circuit and its control method and control system |
| CN107690207A (en) * | 2016-08-04 | 2018-02-13 | 佛山市顺德区美的电热电器制造有限公司 | Electric cooker |
| CN108882421A (en) * | 2017-05-11 | 2018-11-23 | 佛山市顺德区美的电热电器制造有限公司 | Method for heating and controlling, heating control apparatus and electromagnetic heating apparatus |
| US10893579B2 (en) | 2017-07-18 | 2021-01-12 | Whirlpool Corporation | Method for operating an induction cooking hob and cooking hob using such method |
| US10993292B2 (en) | 2017-10-23 | 2021-04-27 | Whirlpool Corporation | System and method for tuning an induction circuit |
| CN109945247B (en) * | 2017-12-21 | 2020-05-05 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic cooking appliance and power control method thereof |
| CN109945248B (en) * | 2017-12-21 | 2020-06-05 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic cooking appliance and power control method thereof |
| CN109945248A (en) * | 2017-12-21 | 2019-06-28 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic cooking appliance and its Poewr control method |
| US11343881B2 (en) | 2017-12-21 | 2022-05-24 | Foshan Shunde Midea Electrical Heating Appliances Manufacturing Co., Ltd. | Electromagnetic cooking appliance and method for controlling power of the same |
| CN109945247A (en) * | 2017-12-21 | 2019-06-28 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic cooking appliance and its Poewr control method |
| WO2019192157A1 (en) * | 2018-04-03 | 2019-10-10 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetically heated cooking utensil, and heating control circuit and method therefor |
| US11751292B2 (en) | 2018-04-03 | 2023-09-05 | Foshan Shunde Midea Electrical Heating Appliances Manufacturing Co., Ltd. | Electromagnetically heated cooking utensil, and heating control circuit and method therefor |
| US11140751B2 (en) | 2018-04-23 | 2021-10-05 | Whirlpool Corporation | System and method for controlling quasi-resonant induction heating devices |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103596307B (en) | 2015-10-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103596307A (en) | Resonance control circuit and electromagnetic heating device | |
| CN102860124B (en) | Furnace unit | |
| CN203457345U (en) | Electromagnetic heating device and control circuit thereof | |
| CN204362337U (en) | Electromagnetic Heating control circuit and electromagnetic heating apparatus | |
| CN104578743B (en) | Power-supplying circuit | |
| CN105282914B (en) | Switchgear and load control system including the switchgear | |
| CN203661321U (en) | Resonance control circuit and electromagnetic heating device | |
| CN103208709B (en) | Wireless intelligent socket | |
| CN105429306A (en) | Wireless charging energy output apparatus and charging method thereof | |
| CN104124764A (en) | Wireless power transmission receiving end, system and receiving method | |
| CN203457344U (en) | Electromagnetic heating device and control circuit thereof | |
| CN208434139U (en) | heating circuit and induction cooker | |
| CN203951636U (en) | The motherboard circuit of electromagnetic heater | |
| CN205481176U (en) | Electromagnetic oven | |
| CN203661322U (en) | Resonant control circuit | |
| WO2015150967A1 (en) | Cooking appliance | |
| CN204014133U (en) | A kind of electromagnetic heating circuit | |
| CN106535381A (en) | IGBT control circuit, heating circuit and electromagnetic heating appliance | |
| CN108365763A (en) | Electronic transformer and microwave cooking electric appliance | |
| CN109195240B (en) | IGBT control circuit, control method, control circuit of heating electric appliance and heating electric appliance | |
| CN204859577U (en) | Electric protection device for electrical equipment and electrical equipment | |
| CN112393280A (en) | Electromagnetic cooking bench and control method thereof | |
| CN201788431U (en) | Control circuit of electric water heater with changeable rated power | |
| CN205408177U (en) | Electric heating control device that possesses little amplitude control function that keeps warm | |
| CN203708525U (en) | Relay control circuit, control circuit of heating device and heating device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |