225results about "Induction current sources" patented technology

The invention discloses a differential closed-loop control method and device for a dual-frequency induction heating power supply inverter, and belongs to the technical field of induction heating power supplies, and the method comprises the steps: carrying out the learning and analysis of a control frequency relation of the dual-frequency induction heating power supply inverter through a deep learning method, and determining an optimal control frequency; a multi-level inverter is used as a power supply inverter for dual-frequency induction heating; s2, according to the optimal control frequency determined in the step S1, performing differential closed-loop control on the output frequency of the multi-level inverter by adopting a control method combining PWM control and PM control; pWM and PM control parameters are dynamically adjusted through a real-time adjustment mechanism of differential closed-loop control. According to the invention, the frequency adjustment precision and the power output stability of the dual-frequency induction heating power supply inverter are improved.

The invention discloses a current source type LCCL double-frequency resonance system and a parameter matching method thereof, which are suitable for synchronous double-frequency induction quenching of complex workpieces such as gears. The system is composed of two current type resonant inverters working at a low frequency and a high frequency respectively and a dual-frequency LCCL resonant cavity, and dual-frequency current superposition is realized through parallel output. The double-frequency LCCL resonant cavity has two parallel resonance points, a mode based on simplified topology is adopted to simplify parameter design, and meanwhile design errors are maintained at a low level. A power matching coefficient is introduced, the ratio of high-frequency output power to low-frequency output power is adjusted by adjusting the value of the power matching coefficient, and the problem of double-frequency power unbalance caused by frequency variation characteristics of load equivalent resistance and the like is solved. The superposed double-frequency current forms a low-frequency envelope embedded high-frequency oscillation composite waveform on the induction heating coil, cooperative control of tooth root deep quenching (low frequency) and tooth surface hard quenching (high frequency) is achieved, and the method has the advantages of being simple in parameter design, high in power decoupling performance, high in operation stability and the like.

The invention discloses a multi-frequency induction heating power supply and a control method thereof, and the power supply comprises an inverter circuit module which is used for outputting a multi-frequency driving voltage, a bidirectional switch module which is used for controlling a heating mode, and a multi-frequency resonance module which is used for multi-frequency induction heating and power decoupling. The control method corresponds to the multi-frequency induction heating power supply. According to the invention, the inversion module outputs a multi-frequency driving voltage, the bidirectional switch module controls a heating mode, and the multi-frequency resonance module realizes multi-frequency heating and power decoupling; the whole structure is simple, the module collaboration is high, a hardware basis is provided for multi-frequency heating, the requirements of different workpieces can be met, meanwhile, multi-frequency crosstalk is avoided in an assisting mode, and the heating reliability and adaptability are improved.

An induction circuit includes a first induction coil, at least one second induction coil, and switching circuitry including a shared half-bridge inverter, a first half-bridge inverter cooperating with the shared half-bridge inverter to control current through the first induction coil, at least one second half-bridge inverter cooperating with the shared half-bridge inverter to control current through the at least one second induction coil, and a first auxiliary switch in series with the first induction coil for selectively electrically coupling and electrically decoupling the first induction coil with at least one of the shared half-bridge inverter and the first half-bridge inverter.

Induction heating roller device (100), comprising: a rotatably mounted roller body (2); an induction heating mechanism (3) for inductively heating the roller body (2), wherein the induction heating mechanism (3) is arranged within the roller body (2); and a cooling mechanism (8) having an atomizing device (81) for generating an atomized coolant, wherein the cooling mechanism (8) introduces the atomized coolant from one axial end into a substantially cylindrical space (X) formed between the roller body (2) and the induction heating mechanism (3), and guides the coolant out of the roller body (2) from one axial end of the space (X), wherein the atomizing device (81) is detachably provided on a bearing shaft (6A) provided at one end of the induction heating mechanism (3); and an ejection opening (81s) of the atomizing device (81) is mounted so as to be positioned on the center axis of a cavity (61) formed along the center axis within the bearing axis (6A).

An induction cooktop comprises a cooktop surface, induction heating coils beneath it, a power supply with power semiconductors for the induction heating coils, and an external electrical connection. The power supply is located on a power circuit board, and the electrical connection is located on a connection circuit board. At least one cooling device is also provided, comprising at least one fan with a fan inlet for intake and a fan outlet for exhaust air to cool the power supply, a cooling air duct, and at least one heat sink to which the cooling air duct leads. In a vertical direction perpendicular to the cooktop surface and to one of the circuit boards, the fan is positioned lower than the heat sink.The connection circuit board runs below the power circuit board, the connection circuit board has an electrical connection to the outside, and the cooling air duct runs with a bend and deflection of 90° or 180° between the fan outlet and the heat sink.

The application discloses an electromagnetic heating circuit, a control method and device of an electrical appliance, and the electrical appliance. The circuit comprises at least two resonance modules, at least two switch modules, an inverter module, a gating module, an oscillation driving module, a voltage signal extraction module, and a control module. The switch module comprises a fixed end, a movable end, a first position end, and a second position end. The fixed end of the at least two switch modules is connected to the at least two resonance modules one by one. The inverter module is connected to the first position end. The gating module is connected to the second position end. The oscillation driving module is connected to the gating module. The voltage signal extraction module is connected to the oscillation driving module. The control module is connected to the inverter module, the voltage signal extraction module, the gating module, and the at least two switch modules. The technical scheme provided by the embodiment of the application can detect whether a pot is placed at a position corresponding to a resonance module not in a heating state when part of the resonance modules in the electromagnetic heating circuit are in the heating state.

An induction heating device provides improved user experience and user interface. The induction heating device includes a first control module that senses a working coil disposed below an object to be heated among a plurality of working coils, and a second control module that controls an input interface to display an image for indicating an optimal heating position of any one object to be heated among a plurality of objects arranged close to each other. The image for indicating the optimal heating position is displayed when there is an interference between vessels.

The invention relates to the technical field of electronic circuits, and discloses a coil current feedback control system and method, and the system comprises a signal generator and a power amplifier which are used for supplying power to a target coil; the current acquisition sensor is used for acquiring the real-time current of the target coil; and the processing module is used for comparing the real-time current with a target current of the target coil, and sending a control instruction to the power amplifier when the real-time current is not equal to the target current, so as to adjust the gain of the power amplifier and adjust the real-time current of the target coil to the target current. According to the invention, through real-time measurement and feedback control of the coil current, automatic adjustment of the gain of the power amplifier is realized, and accurate control of the coil current is further realized.

An induction heating apparatus according to one embodiment includes a working coil disposed in a position corresponding to a heating zone, an inverter circuit that includes a plurality of switching elements and supplies current to the working coil, a driving circuit that supplies a switching signal to each of the switching elements included in the inverter circuit, a current sensor that measures a resonance current value and a magnitude of resonance current flowing in the working coil, and a controller that supplies a control signal for adjusting a duty ratio and a frequency of the switching signal to the driving circuit, to drive the working coil.

An ion source has an arc chamber defining an arc chamber volume. An inductively heated dopant material source is in fluid communication with the arc chamber volume, and has a crucible containing a dopant species and an inductive heater. An induction heater power supply is coupled to the inductive heater to supply an induction current to the induction heater. A controller controls the induction current such that the inductive heater heats the dopant species to a predetermined temperature based on the induction current and selectively flows the dopant species from the crucible to the arc chamber volume. A material monitoring system determines an amount of the dopant species in the crucible based on an induction current supplied to the induction heater. An intermediary receptor can be heated in the crucible by the induction heater to aid a melting of the dopant species within the crucible.

An induction cooktop has a cooktop plate, induction heating coils thereunder, a power supply with power semiconductors for the induction heating coils and an electrical connection to the outside, wherein the power supply is arranged on a power printed circuit board and the electrical connection is arranged on a connection printed circuit board. At least one cooling device is also provided, which has at least one fan with a fan inlet as intake and with a fan outlet for blown-out air for cooling the power supply, a cooling air duct and at least one heat sink, to which the cooling air duct leads. The fan is arranged lower than the heat sink in a vertical direction which runs at right angles to the cooktop plate and to one of the printed circuit boards. The connection printed circuit board runs underneath the power printed circuit board, the connection printed circuit board has an electrical connection to the outside and the cooling air duct runs with a bend and deflection of 90° or of 180° between the fan outlet and the heat sink.

This application discloses an electromagnetic heating circuit, a control method, a device, and an electrical device. The electromagnetic heating circuit includes N resonant modules, an inverter module, N pot detection modules corresponding one-to-one with the N resonant modules, N switching switches corresponding one-to-one with the N resonant modules, a first expansion module, and a control module. The first expansion module may include multiple first expansion units, with any N first connection terminals of the multiple first expansion units connected one-to-one with the N pot detection modules. A first common connection terminal is connected to a first interface of the control module, allowing the control module to receive N pot detection signals output by the N pot detection modules through multiple first interfaces, while the number of first interfaces is much smaller than the number of pot detection modules. Therefore, the electromagnetic heating circuit in this application can expand the input of the control module by setting a first expansion module, thereby saving interface resources of the control module and reducing the difficulty of chip selection.

The utility model relates to the technical field of heating power supplies, in particular to an ultrasonic frequency induction heating power supply convenient to disassemble, which comprises a power supply protection box body, two clamping plates are arranged in the power supply protection box body in a sliding manner, and two mounting frames are arranged at the upper end part of the power supply protection box body in a sliding manner. A threaded rotating rod is rotatably mounted in each mounting frame, a fixed bottom plate is slidably mounted at the rear side end of the power supply protection box body, and bolts are mounted on the left side and the right side of the fixed bottom plate. According to the improved ultrasonic frequency induction heating power supply convenient to disassemble, the fixed bottom plate is matched with the bolts along the threaded holes, the fixed bottom plate is installed at a designated position, then the clamping groove formed in the side end of the fixed bottom plate is matched with the buckling plate, and the power supply protection box body and other parts are installed at designated positions; the power supply can be conveniently mounted and dismounted when the device is used, so that the use flexibility of the device is improved, and the device is convenient to assemble and use.

The invention relates to the technical field of induction heating devices, and discloses a load self-adaptive induction heating power supply, which comprises a double-gain inverter circuit module for outputting two kinds of level equal-level voltage and a load self-adaptive resonance module capable of performing impedance matching on a ferromagnetic load and a non-ferromagnetic load. According to the application, a constant-voltage output mode and a constant-current output mode are realized by changing the working frequency and are respectively used for heating a ferromagnetic material with a relatively low quality factor and a non-ferromagnetic material with a relatively high quality factor, and wide-range high-efficiency power regulation in a half-gain mode and a full-gain mode is realized by changing the switching state; the power supply has the output characteristics of pure resistive input, zero input phase angle and load equivalent resistance irrelevance, and the loss of a switching tube is relatively low; the power supply has a load self-adaptive detection method, so that the load type can be identified on line to work in a proper heating mode; the number of power switch tubes is small, a two-way switch switching matching circuit is not needed, and heating of loads made of different materials can be well coped with.

To provide a power supply device and a magnetic field generation system that can apply an alternating magnetic field properly.SOLUTION: A cancer treatment device includes a control unit for applying an alternating magnetic field including a plurality of different frequency spectra to a cancer cell, where a frequency component of the alternating magnetic field has a plurality of frequency spectra having different strengths.SELECTED DRAWING: Figure 1

A battery induction warmer (100) includes a housing body (1), a heating module (2), at least one battery (3), and a control module (4). The housing body (1) has an accommodation space (A11), and a top opening (A12) and a mounting hole (A13) that are in spatial communication with the accommodation space (A11). The heating module (2) is disposed on the housing body (1). The top opening (A12) is covered by the heating module (2). The at least one battery (3) is detachably disposed in the housing body (1) by passing through the mounting hole (A13). The at least one battery (3) is located in the accommodation space (A11), and a portion of the at least one battery (3) is exposed from an outer side of the housing body (1) by the mounting hole (A13). The control module (4) is disposed in the accommodation space (A11), and is configured to control the heating module (2) to perform heating via power from the at least one battery (3).

The invention discloses a three-phase high-low frequency composite rotating magnetic field induction heating device and method. The device comprises a three-phase high-low frequency rotating magnetic field variable-frequency power supply device, a three-phase high-frequency coupling capacitor, a three-phase low-frequency coupling reactor and a three-phase inductor, the three-phase high-low frequency rotating magnetic field variable-frequency power supply device outputs three-phase high-low frequency composite alternating current with the angle difference of 120 degrees; the three-phase high-frequency frequency conversion series resonance circuit and the three-phase coupling capacitor are combined to form a three-phase high-frequency series resonance working mode; the parallel resonance circuit for the three-phase low-frequency frequency conversion and the three-phase coupling reactor form a three-phase low-frequency parallel resonance working mode; the three-phase inductor participates in high-frequency and low-frequency resonance at the same time to generate a high-low-frequency composite rotating magnetic field. Forward and reverse rotation of the magnetic field can be achieved, any high and low frequency combined rotating magnetic field induction heating is conducted on a heated metal object, and the induction heating quenching effect on the tooth top of a gear with the high frequency and the tooth groove with the low frequency is better than the using effect of a traditional single-frequency non-rotating magnetic field.

This invention discloses a dual-frequency induction heating power supply inverter drive control system and method, belonging to the field of induction heating power supply technology. The dual-frequency induction heating power supply inverter drive control system includes: a rectifier, a filter, and an inverter connected in sequence. The rectifier is connected to a rectifier control circuit, and the inverter is connected to an inverter drive control circuit. The inverter includes three inverter bridge arms. The inverter drive control circuit includes a controller and drive control circuits corresponding to the three inverter bridge arms. The controller collects the inverter current signal and inverter voltage signal from the inverter to generate an inverter frequency control signal, achieving precise control of the switching state of each inverter bridge arm, thereby adjusting the inverter's operating frequency and output power. This invention achieves precise control of the inverter output signal, effectively improving the heating efficiency and uniformity of the dual-frequency induction heating power supply.

The utility model discloses a silicon controlled rectifier trigger power supply system for a fused salt heating power supply, relates to the field of power supplies, and solves the problems of large size, high cost and the like caused by realizing the fused salt heating power supply through a transformer. The frequency and duty ratio are changed through the signal source, the power supply voltage of the pulse amplifier to the driving board is adjusted, the output current and frequency of the pulse amplifier are adjustable, the requirements of different occasions are met, the beam splitting plate is divided into multiple paths of pulses through the controller, the synchronism of multiple paths of optical signals is guaranteed, and the light splitting efficiency is improved. Therefore, the conduction consistency of the silicon controlled rectifiers in the series valve group is greatly improved, the probability that few silicon controlled rectifier modules in the series valve are damaged due to bearing over-high voltage for a long time is reduced, a transformer is not needed, the size is small, the weight is light, and the problems of large size, high cost and the like caused by realizing a molten salt heating power supply through the transformer are solved.

This invention belongs to the field of photovoltaic cell manufacturing technology and discloses an induction heating device and method for the curing and sintering of electrode paste, solving the problems of high energy consumption, poor temperature uniformity, high pollution, and slow response of traditional infrared heating. The device includes five main components: induction heating, load-bearing conveying, temperature control monitoring, etc. The induction heating power supply has a frequency of 30 kHz-80 kHz and a power of 5 kW-200 kW. The temperature control component regulates power in a closed loop, and the atmosphere protection component controls oxygen to ≤100 ppm. The method involves controlling the sintering atmosphere and activating the magnetic field to uniformly feed the silicon wafer substrate into the induction zone, causing the electrode paste layer to heat up at 50-300℃ / min, curing at 50-300℃, sintering at 700-900℃, with temperature fluctuations ≤±3℃ throughout the process, and finally precisely cooling to room temperature. This invention achieves selective heating of the paste, high thermal efficiency, and miniaturized equipment, adapting to high-efficiency photovoltaic cells and new pastes, improving cell conversion efficiency and product consistency, and reducing production risks.

The invention discloses a heating device of a high-temperature heat pipe, and belongs to the technical field of high-temperature heat pipes, the heating device comprises an electromagnetic induction heating assembly, a head sealing element and a tail sealing element, the electromagnetic induction heating assembly comprises a quartz glass pipe, a positive plate, a negative plate, an electrode insulating plate and a metal heating pipe; a high-temperature heat pipe to be tested is placed in the quartz glass pipe, the positive plate and the negative plate are used for being connected with a high-frequency power source, the metal heating pipe is wound around the quartz glass pipe in the circumferential direction and used for acting with a high-frequency electromagnetic field generated by the positive plate and the negative plate, and a fluid channel communicated with cold source fluid is formed in the metal heating pipe. And the head sealing element and the tail sealing element are respectively sealed at two ends of the quartz glass tube. In the manufacturing and checking process of the high-temperature heat pipe, the high-temperature heat pipe can be rapidly heated, the heating time is remarkably shortened, the good cooling effect is achieved, effective and rapid heating and heat dissipation are achieved in the repeated high and low temperature circulation process, and the requirements for manufacturing and checking of the high-temperature heat pipe are met.

The present application relates to electromagnetic induction drying cylinder technical field, specifically, it relates to a kind of direct heating type high-power electromagnetic induction electric drying cylinder system.It includes high-frequency induction host and metal drying cylinder, high-frequency induction host includes rectifier and filter circuit, full-bridge inverter circuit and induction coil and load module, metal drying cylinder includes drying body and radiator, drying body includes support and cylinder body, support fixedly connected with support bearing, cylinder body coaxially connected with rotating gear, cylinder body other end is equipped with outer sleeve, radiator includes fixed shaft, fixed shaft is equipped with fixed body, fixed body bottom is equipped with high-frequency generator, high-frequency generator is loaded with induction coil.The electromagnetic wave emitted by the induction magnetic field is directly absorbed by the drying cylinder itself in the present application, which causes the metal drying cylinder body to heat directly and be heated;At the same time, since the drying cylinder body itself is a metal material, it also directly shields the induction electromagnetic wave, so there is no need to add an electromagnetic shielding device, saving manufacturing cost.

The application discloses a multi-frequency induction heating power supply and a control method thereof. The multi-frequency induction heating power supply comprises an inverter circuit module for outputting a multi-frequency driving voltage, a bidirectional switch module for controlling a heating mode, and a multi-frequency resonance module for multi-frequency induction heating and power decoupling. The control method corresponds to the multi-frequency induction heating power supply. The application outputs a multi-frequency driving voltage through an inverter module, controls a heating mode through a bidirectional switch module, and realizes multi-frequency heating and power decoupling through a multi-frequency resonance module. The overall structure is simple, and the modules have strong collaboration. The application not only provides a hardware basis for multi-frequency heating, but also can adapt to different workpiece requirements, avoid multi-frequency crosstalk, and improve heating reliability and adaptability.

The invention discloses a cooking utensil, electromagnetic heating equipment and a power supply control method and system. The cooking utensil comprises a first communication device and a parameter detection device, wherein the parameter detection device is used for generating a parameter detection signal; the first communication device is used for generating an induction power supply signal according to a first magnetic field of the electromagnetic heating equipment and supplying power to the parameter detection device through the induction power supply signal; the first communication device is further used for transmitting the parameter detection signal to the electromagnetic heating equipment, generating a communication power supply signal according to a second magnetic field of the electromagnetic heating equipment and supplying power to the parameter detection device through the communication power supply signal, parameter detection is carried out through the cooking utensil, the timeliness of parameter detection can be ensured, and the user experience is improved. And power is supplied through the electromagnetic heating equipment, so that the cooking utensil does not need to frequently replace a battery and connect an external power supply wire, and the cooking utensil can conveniently and safely obtain power supply support.

A battery induction warmer includes a housing body, a heating module, at least one battery, and a control module. The housing body has an accommodation space, and a top opening and a mounting hole that are in spatial communication with the accommodation space. The heating module is disposed on the housing body. The top opening is covered by the heating module. The at least one battery is detachably disposed in the housing body by passing through the mounting hole. The at least one battery is located in the accommodation space, and a portion of the at least one battery is exposed from an outer side of the housing body by the mounting hole. The control module is disposed in the accommodation space, and is configured to control the heating module to perform heating via power from the at least one battery.

An aerosol generating apparatus for inductively heating a susceptor 110 of an aerosol forming body 108 comprises a circuit 104 including a power supply 102 and an alternating current generation circui

The invention relates to an induction heating device for heating a metallic good, comprising a number of at least two resonant circuits for generating a magnetic field for heating the metallic good, and a power supply device for supplying the resonant circuits with electrical energy, comprising a disconnect switch for connecting the induction heating device to an electrical power supply, and at least one inverter for converting a direct current into an alternating current for supplying energy to a resonant circuit, wherein the power supply device has a switching device, wherein the switching device is configured to enable at least indirect energy coupling between the disconnect switch and the resonant circuits, wherein the number of simultaneously energy-coupling resonant circuits is smaller than the number of resonant circuits of the induction heating device.

An induction heating cooking apparatus having a cooking container fitness confirmation function includes: a rectification unit; an inverter circuit that converts a DC voltage supplied from the rectifier unit into an AC voltage and applies the AC voltage to the operating coil by switching operation of a switching element that is turned on and off in accordance with a switching signal; the working coil forms an induced magnetic field through alternating current; a switching element control unit that generates a switching signal on the basis of the control signal output from the inverter control unit; a voltage measurement unit that measures an input voltage value of the input power supply; an inverter control unit that, when receiving a control command including fitness confirmation, limits a current value of the working coil in consideration of an input voltage value, generates a control signal, and executes a fitness confirmation function; an input unit that applies a selection input to the fitness confirmation input button to the main control unit; and a main control unit that applies a control command including fitness confirmation corresponding to the selection input to the inverter control unit, receives a factor related to the cooking container efficiency index, and calculates the cooking container efficiency index.