144results about "Induction current sources" patented technology

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.

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 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).

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.

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.

The invention relates to a double-loop control method and system for medium-frequency induction heating of a semiconductor liquid source, and belongs to the technical field of semiconductor manufacturing configuration equipment. The method comprises the steps that the medium-frequency induction electric frequency is obtained, the resonant frequency is synchronously adjusted, and a liquid source heating control basis is provided; constructing a temperature-pressure double-loop feedback curve, dynamically adjusting the inversion output power through a proportional-integral algorithm, and controlling the amplitude and distribution of the medium-frequency induction heating current; through a differential serial communication protocol, the signals are transmitted to the flexible heating coil through a twisted-pair shielded wire and a differential signal interface, and the liquid source is heated by the induction eddy current; and controlling the temperature of the induced eddy current heat source based on a fanless cooling scheme, adjusting the cooling intensity by associating the medium-frequency induced electric frequency, and executing power limitation when the load impedance is abnormal based on built-in safety interlocking logic when the liquid source temperature is monitored to deviate from a preset safety cooling temperature interval.

A home appliance is provided that may include a first air flow path included in a heat sink, and a second air flow path defined at a lower side of the heat sink, such that air flows to inside and outside of the heat sink efficiently. A plurality of heat dissipation fins may protrude downward from a wall of the second air flow path, increasing a contact surface between the heat sink and air. A projection may be formed on at least one of the walls of the first air flow path, the walls of the second air flow path, an outer surface of the plurality of heat dissipation fins, or an upper surface of the heat sink.

The invention provides an induction heating cooker, and a control device and a control method for the induction heating cooker, which can suppress interference sound. This induction heating cooker is provided with: a first heating coil for heating the center region of the bottom surface of a heating container; a second heating coil that is disposed concentrically with the first heating coil and heats an outer peripheral region of the central region of the heating container; a first inverter circuit that supplies a high-frequency current to the first heating coil; a second inverter circuit that supplies a high-frequency current to the second heating coil; and a control unit that controls the first inverter circuit and the second inverter circuit, the control unit operating the first inverter circuit and the second inverter circuit at substantially the same operating frequency when a high-frequency current is supplied to the first heating coil and the second heating coil.

The present application provides an inductive heating device and a control method thereof. An inductive heating device according to an embodiment of the present application includes: a work coil disposed at a position corresponding to a heating area; an inverter circuit including a plurality of switching elements, which supplies a current to the work coil; a drive circuit, which supplies a switching signal to each of the switching elements included in the inverter circuit; a current sensor, which measures a resonance current value as a magnitude of a resonance current flowing in the work coil; and a controller, which drives the work coil by supplying a control signal for adjusting a duty ratio and a frequency of the switching signal to the drive circuit. The controller performs a container sensing drive by setting and adjusting the duty ratio and the frequency of the switching signal, and determines whether a container exists in the heating area based on the resonance current value measured by the current sensor after the container sensing drive ends.

The invention discloses a self-adaption method of a power supply voltage self-adaption induction cooker, and relates to the technical field of induction cookers. The self-adaptive method comprises the following steps of: 1, preparing a self-adaptive power supply; step 2, voltage self-adaption method: detecting the magnitude of the voltage through a voltage detection circuit, detecting the magnitude of the input power supply voltage through the voltage detection circuit by a machine, then transmitting the magnitude of the input power supply voltage to a microcomputer processor of the induction cooker, and switching to a corresponding resonance circuit according to the detected voltage by the microcomputer processor of the induction cooker; and meanwhile, a pin 2 of a microcomputer processor of the induction cooker outputs a corresponding PWM control signal to control the conduction time of a switch tube, the machine automatically switches corresponding modes and hardware circuits under different voltages, the machine can output 1300-1800W power under the voltage of 100V-127V, the machine can output 1800-2500W power under the voltage of 220V-240V, and the heating efficiency is high.

A system for controlling an induction cooking apparatus includes resonant loads each having an induction coil of said induction cooking apparatus, switching circuitry including a shared half-bridge, and a plurality of secondary half-bridges each cooperating with the shared half-bridge to form a plurality of full-bridge inverters. Control circuitry is configured to determine a plurality of target power levels including a target power level for each one of the plurality of resonant loads, calculate a switching frequency common to the shared half-bridge and the plurality of secondary half-bridges based on the comparison of the target levels, generate a plurality of control signals each for application to a half-bridge of the plurality of secondary half-bridges, calculate a phase displacement for each of the plurality of control signals, and determine a maximum current through the shared half-bridge independent of an orientation of the phase displacement for each of the plurality of control signals.