CN212085896U - Circuit structure of wireless power supply milk foam machine and milk foam machine - Google Patents
Circuit structure of wireless power supply milk foam machine and milk foam machine Download PDFInfo
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- CN212085896U CN212085896U CN202020374425.XU CN202020374425U CN212085896U CN 212085896 U CN212085896 U CN 212085896U CN 202020374425 U CN202020374425 U CN 202020374425U CN 212085896 U CN212085896 U CN 212085896U
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Abstract
The utility model discloses a circuit structure of a wireless power supply milk foam machine and the milk foam machine, wherein the milk foam machine comprises a power supply device, a wireless receiving device and a milk foam machine body; a first rectifying and filtering circuit, an inverter circuit and a transmitting coil are arranged in the power supply device; the radio receiving device is provided with a receiving coil, a second rectifying and filtering circuit and a BUCK type switch voltage stabilizing circuit; the radio receiving device is arranged in the milk foaming machine body. The utility model gets rid of the problem that the power lines of the traditional household electrical appliances are difficult to arrange, and the appearance is more concise; meanwhile, the wireless power supply mode is adopted, the first rectifying and filtering circuit, the inverter circuit and the transmitting coil are installed in a power supply base of the milk foam machine, the receiving coil, the second rectifying and filtering circuit and the BUCK type switch voltage stabilizing circuit are installed in the milk foam machine body in an integrated mode, wireless materials of the machine are exposed, potential safety hazards caused by abrasion of wires and exposure of wires are avoided, and the waterproof performance is higher.
Description
Technical Field
The utility model relates to a household electrical appliances, concretely relates to circuit structure and milk bubble machine of wireless power supply milk bubble machine.
Background
The circuit structure of the traditional milk foam machine is shown in figure 1, wherein a dotted line frame 1 is a rectifying and filtering circuit, is connected to the output end of a transformer, and converts alternating current into stable direct current through the rectifying and filtering circuit; the voltage stabilizing circuit on the right side plays a role in reducing the influence caused by the voltage fluctuation of a power grid or the change of a load and providing stable voltage for the load; the dotted frame 6 is a heating circuit, 220v/50hz alternating current is connected, and a relay K1 is controlled to turn on or turn off the heating circuit through a single-chip microcomputer Heat pin.
Because the traditional milk frother has the power cord, the following problems can exist: 1) difficult to clean up: when the number of the electric equipment is large, power lines, data lines and the like of the equipment are mutually wound and difficult to arrange; 2) poor safety: because the power cord exposes, after long-time use, the condition that the wire rod wearing and tearing, wire expose appears easily, brings the potential safety hazard for the user.
Patent No. CN102715842A discloses a wireless power supply milk foam machine, which includes a container, a wireless power supply transmitter, a wireless power supply receiver, a housing, a driving device, and a stirring device, wherein the wireless power supply transmitter is disposed outside the container, the wireless power supply receiver is disposed in the housing, and the wireless power supply transmitter and the wireless power supply receiver supply power to the driving device. Although the wireless power supply milk foam machine realizes the mutual separation of the wireless power supply device and the driving device, no exposed contact is generated, and certain safety can be improved. However, the wireless power supply transmitting device is installed inside the body of the milk foam machine, which means that the wire still needs to be exposed outside the body of the milk foam machine to supply power to the wireless power supply transmitting device, and the problems that power lines, data lines and the like of multiple devices are mutually wound, difficult to arrange, worn by the wire, exposed by the wire and the like are not fundamentally solved, and the wireless power supply transmitting device is essentially a wired power supply milk foam machine.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem that present milk bubble machine still adopts wired power supply mostly, the embodiment of the utility model provides a circuit structure of wireless power supply milk bubble machine.
In addition, in order to get rid of traditional milk bubble machine because there is the power cord that leads to be difficult to arrange in order, the poor technical problem of security, the embodiment of the utility model provides a wireless power supply milk bubble machine is still provided.
In order to achieve the above purpose, the technical scheme of the utility model is that:
in a first aspect, the embodiment of the utility model provides a circuit structure of wireless power supply milk bubble machine, include:
a radio transmission circuit including a transmission coil and a reception coil; the transmitting coil is used for receiving alternating current so as to convert the alternating current into an electromagnetic signal; the receiving coil is used for receiving the electromagnetic signal transmitted by the transmitting coil and converting the electromagnetic signal into alternating current for output;
the input end of the second rectifying and filtering circuit is connected with the two ends of the receiving coil and used for converting the alternating current into direct current to be output;
and the input end of the BUCK type switching voltage stabilizing circuit is connected with the output end of the second rectifying and filtering circuit, and the output end of the BUCK type switching voltage stabilizing circuit is connected with a voltage stabilizing circuit.
Further, the circuit structure of wireless power supply milk bubble machine still includes:
the input end of the first rectifying and filtering circuit is used for being connected with an alternating current power supply and converting alternating current into direct current to be output;
and the input end of the inverter circuit is connected with the output end of the first rectifying and filtering circuit and is used for converting the direct current output by the first rectifying and filtering circuit into alternating current with required frequency.
Further, the inverter circuit is a half-bridge inverter circuit or a full-bridge inverter circuit; when the inverter circuit is a half-bridge inverter circuit, the inverter circuit comprises a second controller, capacitors C2 and C3, and MOS transistors Q1 and Q2; the capacitors C2 and C3 and the MOS transistors Q2 and Q1 are sequentially connected to form a loop; the second controller controls the Q1 and the Q2 to be alternately conducted at the natural frequency omega so as to convert the direct current into the alternating current with the required frequency; the MOS tubes Q1 and Q2 are both gallium nitride or silicon carbide MOS tubes.
Furthermore, the second rectifying and filtering circuit consists of a rectifying circuit and a filtering capacitor; the rectification circuit is a bridge rectification circuit or a half-wave rectification circuit or a full-wave rectification circuit and mainly comprises a fast recovery diode and a filter capacitor.
Furthermore, the transmitting coil and the receiving coil have the same structure and are both coupling coils consisting of inductors and compensation capacitors.
Further, the second controller is also connected with a detection and communication circuit, and the detection and communication circuit is connected to two ends of the transmitting coil; the detection and communication circuit comprises a detection module used for sampling the oscillation signal, counting pulses, comparing the monitored oscillation frequency with a preset value set in the second controller, judging whether a receiving coil is arranged above the transmitting coil or not and controlling whether the transmitting coil operates or not.
Further, the BUCK-type switching voltage stabilizing circuit comprises a MOS transistor Q3, an inductor, a capacitor, a diode, and a third controller; the inductor, the capacitor and the diode are sequentially connected to form a loop; the S pole of the MOS tube Q3 is connected with the output end of the second rectifying and filtering circuit, the D pole is connected with the inductor, and the G pole is connected with the third controller, so that the duty ratio of the PWM modulation wave is controlled through the third controller, and the output voltage is adjusted;
furthermore, the receiving coil is connected with a second communication module, the detection and communication circuit comprises a first communication module, when the receiving coil is detected and judged to be arranged above the transmitting coil, the first communication module and the second communication module are paired through information codes, after pairing is successful, the wireless power transmitting end obtains parameters such as current and voltage of the receiving end according to the paired information codes, the parameters such as current and voltage of the transmitting end are adjusted according to the parameters, and the transmitting coil provides required wireless power for the receiving coil according to the matched information codes to ensure that receiving end equipment can work stably.
In a second aspect, an embodiment of the present invention provides a wireless power supply milk foam machine, which includes a power supply device, a wireless receiving device, and a milk foam machine body; a first rectifying and filtering circuit, an inverter circuit and a transmitting coil are arranged in the power supply device; a receiving coil, a second rectifying and filtering circuit and a BUCK type switch voltage stabilizing circuit are arranged in the radio receiving device; the radio receiving device is arranged in the milk foaming machine body;
the input end of the first rectifying and filtering circuit is used for being connected with an alternating current power supply and converting alternating current into direct current for output;
the input end of the inverter circuit is connected with the output end of the first rectifying and filtering circuit and is used for converting the direct current output by the first rectifying and filtering circuit into alternating current with the frequency f;
two ends of the transmitting coil are connected with the output end of the inverter circuit and used for wirelessly transmitting alternating current; the receiving coil is used for receiving the alternating current transmitted by the transmitting coil and directly supplying power to the heating circuit of the milk foam machine;
the input end of the second rectifying and filtering circuit is connected with two ends of the receiving coil and used for converting alternating current into direct current to be output;
the input end of the BUCK type switch voltage stabilizing circuit is connected with the output end of the second rectifying and filtering circuit, and the output end of the BUCK type switch voltage stabilizing circuit is connected with a voltage stabilizing circuit;
the transmitting coil and the receiving coil form a radio transmission circuit.
Compared with the prior art, the utility model, its advantage lies in:
the wireless power supply milk foam machine provided by the embodiment of the utility model integrates the resonant wireless power supply technology in the traditional milk foam machine, thereby getting rid of the problem that the power lines of the traditional household appliances are difficult to arrange, and the appearance is more concise; meanwhile, due to the fact that a wireless power supply mode is adopted, the first rectifying and filtering circuit, the inverter circuit and the transmitting coil are installed in a power supply base of the milk foam machine, the receiving coil, the second rectifying and filtering circuit and the BUCK type switch voltage stabilizing circuit are installed in the milk foam machine body in an integrated mode, a wireless material of the machine is exposed, potential safety hazards caused by abrasion of wires and exposure of wires are avoided, and electric wires are packaged inside the machine body.
Drawings
FIG. 1 is a schematic diagram of a circuit structure of a conventional milk frother;
fig. 2 is a schematic circuit structure diagram of the wireless power supply milk foam machine provided by the embodiment of the present invention;
fig. 3 is a schematic view of the overall structure of the wireless power supply milk foam machine provided by the embodiment of the present invention;
in the figure: 1. a first rectifying and filtering circuit; 2. an inverter circuit; 3. a radio transmission circuit; 4. a second rectifying and filtering circuit; 5. a BUCK type switching regulator circuit; 6. a heating circuit; 100. a power supply device; 200. a radio receiving device; 300. a milk foam machine body.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Example (b):
the circuit structure of the wireless power supply milk foam machine provided by the present invention is described in detail below with reference to a specific application scenario example, in this embodiment, the circuit structure of the wireless power supply milk foam machine is applied to a milk foam machine, so as to become a wireless power supply milk foam machine.
Referring to fig. 2-3, the wireless power supply milk foam machine provided in this embodiment mainly includes a power supply device 100 (i.e., a power supply base), a wireless receiving device 200 and a milk foam machine body 300; a first rectifying and filtering circuit 1, an inverter circuit 2 and a transmitting coil are integrally installed in the power supply device 100; the radio receiving device 200 is integrally provided with a receiving coil, a second rectifying and filtering circuit 4 and a BUCK type switching regulator circuit 5; the radio receiving device 200 is arranged at the bottom of the milk frother body 300; when the wireless power supply device is used specifically, the power supply device can be installed below a table, and when the wireless power supply device is used by a user, the power supply device 100 can carry out efficient wireless power supply on the milk foam machine only by placing the milk foam machine body 300 above the table.
The input end of the first rectifying and filtering circuit 1 is used for connecting with an alternating current power supply to convert 220v/50hz alternating current into smooth direct current. The input end of the inverter circuit 2 is connected to the output end of the first rectifying and filtering circuit 2, and is used for converting the direct current output by the first rectifying and filtering circuit 2 into high-frequency alternating current with a frequency of about 600-. Since the milk foam machine is used in households, the adopted power supply is household electricity, namely 220v/50hz alternating current, and to realize efficient wireless power supply, the frequency of the 220v/50hz alternating current needs to be changed, therefore, a first rectifying and filtering circuit 1 and an inverter circuit 2 are further arranged in the embodiment to invert the alternating current after the alternating current is converted into direct current to change the frequency, so that the high-frequency alternating current with the required frequency is obtained. Of course, if the frequency of the alternating current received by the receiving coil meets the required requirement, in some other application scenarios, the first rectifying and filtering circuit 1 and the inverter circuit 2 do not need to be provided.
The transmitting coil and the receiving coil form a radio transmission circuit 3, as shown in fig. 2, in this embodiment, the radio transmission circuit adopts a parallel resonance mode (the coil and the capacitor are connected in parallel); of course, in other embodiments, series resonance (coil and capacitor in series) may be used. Specifically, two ends of the transmitting coil are connected with the output end of the inverter circuit 2, and are used for converting alternating current into electromagnetic signals; the receiving coil is used for receiving the electromagnetic signal transmitted by the transmitting coil, converting the electromagnetic signal into high-frequency alternating current to be output and directly supplying power to the heating circuit 6 of the milk foam machine, namely, the energy received by the receiving coil is the high-frequency alternating current and has a higher voltage value, and the heating circuit 6 can be directly supplied with power without rectification and voltage stabilization, so that a required wire does not need to be thick, and the product structure is more compact; specifically, a Heat pin of the first singlechip of the heating circuit 6 controls the relay K1 to turn on or off the heating circuit.
The input end of the second rectifying and filtering circuit 4 is connected with two ends of the receiving coil and is used for converting alternating current into direct current to be output; the input end of the BUCK type switch voltage stabilizing circuit 5 is connected with the output end of the second rectifying and filtering circuit 4, the output end of the BUCK type switch voltage stabilizing circuit is connected with a voltage stabilizing circuit, namely, direct current passes through different voltage stabilizing circuits and is converted into direct current with different amplitudes, power is supplied to other parts of the milk bubble machine body, and the BUCK type switch voltage stabilizing circuit can perform high-efficiency and low-heating voltage reduction and voltage stabilization. Because the heating plate of the milk foam machine heating circuit 6 needs to use high voltage of 150V and above to work with high efficiency, and other circuit parts of the milk foam machine such as a motor circuit, a temperature control circuit, an LED circuit, a reset circuit and the like need to use low voltage of 9V or 5V, therefore, the output end of the receiving coil is provided with the second rectifying and filtering circuit 4, after rectification and filtering, the high voltage is reduced by a BUCK type switch voltage stabilizing circuit, loss can be reduced in the high voltage reducing process, heat is reduced, the utilization rate of electric energy is improved, finally, the electric energy is converted into direct current with different amplitudes through different voltage stabilizing circuits, power is supplied to other parts of the milk foam machine body, and the voltage working requirement of the milk foam machine can be met.
Specifically, the BUCK-type switching voltage stabilizing circuit comprises an MOS (metal oxide semiconductor) tube Q3, an inductor L3, a capacitor C7, a diode D4 and a third single chip microcomputer; the inductor L3, the capacitor C7 and the diode D4 are sequentially connected to form a loop; the S pole of the MOS transistor Q3 is connected with the output end of the second rectifying and filtering circuit, the D pole is connected with the inductor L3, the G pole is connected with the third single chip microcomputer to control the duty ratio of the PWM modulation wave through the third single chip microcomputer and adjust the output voltage, so that the output voltage is adjusted by utilizing the BUCK switch type voltage stabilizing circuit 5 and controlling the duty ratio of the PWM modulation wave through the third single chip microcomputer, the electric energy conversion efficiency is improved, and the heating is reduced.
Therefore, the wireless power supply milk foam machine provided by the embodiment integrates a resonant wireless power supply technology in the traditional milk foam machine, the problem that power lines of traditional household appliances are difficult to arrange is solved, and the appearance is simpler; meanwhile, the wireless power supply mode is adopted, the first rectifying and filtering circuit, the inverter circuit and the transmitting coil are installed in a power supply base of the milk foam machine, the receiving coil, the second rectifying and filtering circuit and the BUCK type switching voltage stabilizing circuit are installed in the milk foam machine body in an integrated mode, wireless materials of the machine are exposed, potential safety hazards caused by abrasion of wires and exposure of wires are avoided, and electric wires are packaged inside the machine body.
Specifically, the transmitting coil and the receiving coil are both coupling coils consisting of inductance with equal inductive reactance XL and capacitive reactance XC and compensation capacitance and are used for transmitting wireless electric energy, and the resonant frequency of the coupling coils is
The value is different between the time of receiving equipment and the time of no receiving equipment, when receiving equipment exists, the inductance L is increased, and the oscillation frequency omega is increased; when there is no receiving device, the inductance L becomes small, and the oscillation frequency ω decreases. The inverter circuit 2 is a half-bridge inverter circuit in this embodiment, and may also be a full-bridge inverter circuit in some other embodiments, specifically, the half-bridge inverter circuit is mainly composed of a second controller, capacitors C2 and C3, and MOS transistors Q1 and Q2. The second singlechip controls the Q1 and the Q2 to be conducted alternately at the natural frequency omega of the oscillating circuit, converts the direct current into high-frequency alternating current,the frequency f of the alternating current being equal to the natural frequency omega of the coupling coil, i.e.
Therefore, the coupling coil can resonate, the coupling state is strengthened, and the wireless transmission efficiency of electric energy is greatly improved. In addition, this second singlechip still is connected with detection and communication circuit, and this detection and communication circuit connect the both ends at transmitting coil, includes detection module for sampling the oscillating signal, carry out the pulse count, compare the oscillating frequency who monitors with the default that sets for in the second singlechip, judge whether transmitting coil top has receiving coil, whether control transmitting coil moves to accomplish more power saving, safer.
In order to make the milk frother even more power-saving and safe, the detection and communication circuit further comprises a first communication module, and the radio receiving device further comprises a second communication module; the second communication module is connected with the receiving coil and controlled by the first single chip microcomputer, when the receiving coil is detected and judged to be arranged above the transmitting coil, the first communication module and the second communication module are matched through the information code, and the transmitting coil provides required wireless electric energy for the receiving coil according to the matched information code. Because the rated power of each milk foam machine is different and the requirement on current and voltage is higher, the communication module is added into the two coupling coils, so that the communication between the transmitting end and the receiving end is kept, the transmitting end can be ensured to adjust the current and voltage parameters of the transmitting end, and stable power output is provided for the receiving end. After the transmitting end detects the equipment, the communication module 1 and the communication module 2 are paired, and after the pairing is successful, the wireless power transmitting end acquires parameters such as current and voltage of the receiving end according to the paired information codes and adjusts the parameters such as the current and the voltage of the transmitting end according to the parameters, so that the equipment of the receiving end can work stably. For example, the transmitting end is in a standby state when the receiving device is not detected, and the transmitting end is turned on only when the receiving device is detected by the transmitting end. The communication module can provide required wireless power for the receiving end according to the information code that receiving arrangement paired, if the milk bubble machine needs 500 watts of rated power, 500 watts of electric energy can be launched to the transmitting end, 600 watts of electric energy can not be launched, otherwise the electric energy of sending more will cause the waste, can accomplish more power saving, safer, work more steadily.
In addition, since the energy received by the receiving coil is high-frequency alternating current, and the high-frequency alternating current passes through the second rectifying and filtering circuit to obtain stable direct current, because the frequency of the alternating current of the part is very high, in this embodiment, the second rectifying and filtering circuit adopts a bridge rectifying and filtering circuit, which mainly comprises four fast recovery diodes (FRD, fast recovery diode for short) to convert the high-frequency alternating current into stable direct current. Of course, in other embodiments, the second rectifying and filtering circuit may also adopt a half-wave rectification mode or a full-wave rectification mode.
More preferably, all the MOS transistors (including Q1, Q2, Q3) described above use a gallium nitride MOSFET or a silicon carbide MOSFET. The two MOS tubes have the advantages that: 1. the forbidden bandwidth of gallium nitride is 3.4eV, the forbidden bandwidth of silicon carbide is 3.3eV, and in comparison, the forbidden bandwidth of silicon is only 1.1eV, and directly determines the withstand voltage and the highest working temperature of an electronic device, the larger the forbidden bandwidth is, the higher the voltage and the temperature which can be borne by the device are, the higher the breakdown voltage is, and the higher the withstand power is, so that the gallium nitride MOS tube and the silicon carbide MOS tube have higher withstand voltage value and higher high temperature resistance compared with the traditional MOS tube; 2. under the same breakdown voltage of 1000V, the on-resistance of the gallium nitride MOS tube is 0.04m omega/cm2The on-resistance of the silicon carbide MOS tube is 0.3m omega/cm2And the on-resistance of the traditional MOS tube is 200m omega/cm2. The lower on-resistance is directly expressed as heat productivity during conduction, and the smaller the on-resistance is, the lower the heat productivity is, the smaller the conduction loss is, and the lower the overall loss of the wireless power supply system is; 3. the electronic saturation speed of gallium nitride and silicon carbide is 3-4 times that of silicon, and the faster electronic saturation speed can bring faster switching speed. For example, the switching speed of a common MOS tube is up to 600khz, and the switching speeds of a silicon carbide MOS tube and a gallium nitride MOS tube can reach more than 1Mhz, so that the MOS tube is suitable for higher working frequency; 4. compared with the traditional silicon-based MOS tube, the silicon carbide MOS tube and the gallium nitride MOS tube can bearHigher current and voltage, higher switching speed, less energy loss, and higher temperature resistance. Therefore, the product made of silicon carbide and gallium nitride can correspondingly reduce components such as capacitors, inductors, coils, radiating assemblies and the like, so that the whole product is lighter, energy-saving and stronger in output power, meanwhile, the reliability is enhanced, and the advantages are very obvious.
The wireless power supply milk foam machine provided by the embodiment has the following specific working process:
(1) the 220v/50hz alternating current is converted into pulsating direct current after passing through a full-bridge rectifier D1, and the pulsating direct current is obtained after passing through a filter capacitor C1.
(2) The second single-chip microcomputers Q1 and Q2 are alternately conducted at the natural frequency omega of the oscillating circuit to convert the direct current into high-frequency alternating current, and the frequency f of the alternating current is equal to the natural frequency omega of the coupling coil, namely
(3) The coupling coil resonates and energy is transferred from the transmitting coil to the receiving coil.
(4) The energy received by the receiving coil is high-frequency alternating current which directly supplies power to the heating circuit, and a Heat pin of the first single chip microcomputer controls the relay K1 to turn on or turn off the heating circuit.
(5) After the high-frequency alternating current passes through the rectifying and filtering circuit, smooth direct current is obtained, and because the frequency of the alternating current of the part is very high, a rectifying bridge D2 in the circuit is built by using a fast recovery diode.
(6) The Heat pin of the first singlechip controls the relay K1 to turn on or off the heating circuit.
(7) The BUCK-type switching regulator circuit performs high-efficiency and low-heat step-down and voltage stabilization.
(8) The direct current is converted into direct current with different amplitudes through different voltage stabilizing circuits, and the direct current supplies power to all parts of the milk foam machine.
In summary, compare with traditional milk bubble machine circuit structure, the wireless power supply milk bubble machine that this embodiment provided has following technical advantage:
(1) after 220v/50hz alternating current is connected, the alternating current is rectified and filtered into direct current after passing through a rectifying and filtering circuit.
(2) And (3) inverting the direct current into high-frequency alternating current with the frequency f consistent with the natural frequency omega of the coupling coil through an inverter circuit.
(3) When wireless electric energy is transmitted, the coupling coil resonates, the coupling state is strengthened, and the electric energy transmission efficiency is improved.
(4) The BUCK switch type voltage stabilizing circuit is used for controlling the duty ratio of PWM (pulse-width modulation) modulation waves through the single chip microcomputer, adjusting output voltage, improving the electric energy utilization rate and reducing heating.
(5) Add detection and communication module, wireless power supply transmitting terminal is automatic when detecting equipment and is opened and pair with equipment, according to the information code automatic adjustment current voltage value of pairing, can accomplish more power saving, safer, work more steadily.
(6) By utilizing the characteristics of large forbidden band width, low conduction loss, high working frequency and the like of the gallium nitride MOSFET and the silicon carbide MOSFET, the overall loss of a wireless transmission system is reduced, the transmission efficiency is improved, the product volume is reduced, and the reliability is enhanced.
Of course, all the singlechips related to the embodiment can be replaced by other control chips.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.
Claims (11)
1. A circuit structure of wireless power supply milk bubble machine which is characterized by comprising:
a radio transmission circuit including a transmission coil and a reception coil; the transmitting coil is used for receiving alternating current so as to convert the alternating current into an electromagnetic signal; the receiving coil is used for receiving the electromagnetic signal transmitted by the transmitting coil and converting the electromagnetic signal into alternating current for output;
the input end of the second rectifying and filtering circuit is connected with the two ends of the receiving coil and used for converting the alternating current into direct current to be output;
and the input end of the BUCK type switching voltage stabilizing circuit is connected with the output end of the second rectifying and filtering circuit, and the output end of the BUCK type switching voltage stabilizing circuit is connected with a voltage stabilizing circuit.
2. The circuit structure of a wirelessly powered milk frothing machine according to claim 1, further comprising:
the input end of the first rectifying and filtering circuit is used for being connected with an alternating current power supply and converting alternating current into direct current to be output;
and the input end of the inverter circuit is connected with the output end of the first rectifying and filtering circuit and is used for converting the direct current output by the first rectifying and filtering circuit into alternating current with required frequency.
3. The circuit structure of the wireless power supply milk foam machine according to claim 2, wherein the inverter circuit is a half-bridge inverter circuit or a full-bridge inverter circuit; when the inverter circuit is a half-bridge inverter circuit, the inverter circuit comprises a second controller, capacitors C2 and C3 and MOS transistors Q1 and Q2, wherein the capacitors C2 and C3 and the MOS transistors Q2 and Q1 are sequentially connected to form a loop, and the second controller controls the Q1 and the Q2 to be alternately conducted at the frequency omega so as to convert direct current into alternating current at the required frequency; the MOS tubes Q1 and Q2 are both gallium nitride or silicon carbide MOS tubes.
4. The circuit structure of the wireless power supply milk foaming machine according to claim 1, wherein the second rectifying and filtering circuit is composed of a rectifying circuit and a filtering capacitor; the rectification circuit is a bridge rectification circuit or a half-wave rectification circuit or a full-wave rectification circuit and mainly comprises a fast recovery diode and a filter capacitor.
5. The circuit structure of a wireless power supply milk frother of claim 3, characterized in that the second controller is further connected with a detection and communication circuit, the detection and communication circuit is connected to both ends of the transmitting coil; the detection and communication circuit comprises a detection module used for sampling the oscillation signal, counting pulses, comparing the monitored oscillation frequency with a preset value set in the second controller, judging whether a receiving coil is arranged above the transmitting coil or not and controlling whether the transmitting coil operates or not.
6. The circuit structure of the wireless power supply milk foaming machine according to claim 1, wherein the BUCK-type switching voltage regulator circuit comprises a MOS transistor Q3, an inductor, a capacitor, a diode, and a third controller; the inductor, the capacitor and the diode are sequentially connected to form a loop; the S pole of the MOS tube Q3 is connected with the output end of the second rectifying and filtering circuit, the D pole is connected with the inductor, and the G pole is connected with the third controller, so that the duty ratio of the PWM modulation wave is controlled through the third controller, and the output voltage is adjusted; the MOS tube Q3 is a gallium nitride or silicon carbide MOS tube.
7. The circuit structure of claim 5, wherein the receiving coil is connected to a second communication module, the detecting and communicating circuit comprises a first communication module, when the detecting and communicating circuit determines that the receiving coil is located above the transmitting coil, the first communication module and the second communication module are matched through an information code, and the transmitting coil provides the receiving coil with the required wireless power according to the matched information code.
8. A wireless power supply milk foam machine is characterized by comprising a power supply device, a wireless receiving device and a milk foam machine body; a first rectifying and filtering circuit, an inverter circuit and a transmitting coil are arranged in the power supply device; a receiving coil, a second rectifying and filtering circuit and a BUCK type switch voltage stabilizing circuit are arranged in the radio receiving device; the radio receiving device is arranged in the milk foaming machine body;
the input end of the first rectifying and filtering circuit is used for being connected with an alternating current power supply and converting alternating current into direct current for output;
the input end of the inverter circuit is connected with the output end of the first rectifying and filtering circuit and is used for converting the direct current output by the first rectifying and filtering circuit into alternating current with required frequency;
two ends of the transmitting coil are connected with the output end of the inverter circuit and used for converting alternating current into electromagnetic signals; the receiving coil is used for receiving the electromagnetic signal transmitted by the transmitting coil, converting the electromagnetic signal into alternating current and directly supplying power to the heating circuit of the milk foam machine;
the input end of the second rectifying and filtering circuit is connected with two ends of the receiving coil and used for converting alternating current into direct current to be output;
the input end of the BUCK type switch voltage stabilizing circuit is connected with the output end of the second rectifying and filtering circuit, and the output end of the BUCK type switch voltage stabilizing circuit is connected with a voltage stabilizing circuit;
the transmitting coil and the receiving coil form a radio transmission circuit.
9. The wireless power supply milk frothing machine of claim 8 wherein the inverter circuit is a half bridge inverter circuit or a full bridge inverter circuit; when the inverter circuit is a half-bridge inverter circuit, the inverter circuit comprises a second controller, capacitors C2 and C3, and MOS transistors Q1 and Q2; the capacitors C2 and C3 and the MOS transistors Q2 and Q1 are sequentially connected to form a loop; the second controller controls the Q1 and the Q2 to be alternately conducted at the frequency omega so as to convert the direct current into the alternating current with the required frequency; the MOS tubes Q1 and Q2 are both gallium nitride or silicon carbide MOS tubes.
10. The wireless power feeding milk foaming machine according to claim 9, wherein the second controller is further connected to a detection and communication circuit, the detection and communication circuit is connected to both ends of the transmitting coil, the detection and communication circuit comprises a first communication module for sampling the oscillation signal, counting pulses, comparing the monitored oscillation frequency with a preset value set in the second controller, determining whether a receiving coil is above the transmitting coil, and controlling whether the transmitting coil is operated; the wireless receiving device comprises a receiving coil, a detecting and communicating circuit and a wireless receiving device, wherein the detecting and communicating circuit further comprises a first communicating module, the second communicating module is connected with the receiving coil, when the receiving coil is detected and judged to be arranged above the transmitting coil, the first communicating module and the second communicating module are matched through information codes, and the transmitting coil adjusts current and voltage parameters of a transmitting end according to the matched information codes to provide required wireless electric energy for the receiving coil.
11. The wirelessly powered milk frothing machine of claim 8, wherein the BUCK-type switching regulator circuit comprises a MOS transistor Q3, an inductor, a capacitor, a diode, and a third controller; the inductor, the capacitor and the diode are sequentially connected to form a loop; the S pole of the MOS tube Q3 is connected with the output end of the second rectifying and filtering circuit, the D pole is connected with the inductor, and the G pole is connected with the third controller, so that the duty ratio of the PWM modulation wave is controlled through the third controller, and the output voltage is adjusted; the MOS tube Q3 is a gallium nitride or silicon carbide MOS tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020374425.XU CN212085896U (en) | 2020-03-23 | 2020-03-23 | Circuit structure of wireless power supply milk foam machine and milk foam machine |
Applications Claiming Priority (1)
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| US11201606B2 (en) * | 2017-12-08 | 2021-12-14 | Institute Of Geology And Geophysics, The Chinese Academy Of Sciences | CSAMT transmitter |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US11201606B2 (en) * | 2017-12-08 | 2021-12-14 | Institute Of Geology And Geophysics, The Chinese Academy Of Sciences | CSAMT transmitter |
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