310results 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.

A method of determining an operating configuration of a stove having: a cooktop having a plurality of heating regions; a power cord connected to a receptacle; a housing; a battery disposed within the housing, where the obtained stove use data comprises information regarding use of at least one of the heating regions of the cooktop. The method includes determining an operating configuration based at least in part on obtained stove use data and obtained power availability data, the determined operating configuration including one of: a full power configuration where the heating regions operate at a maximum power greater than 120V input voltage based on power from both the receptacle and the battery or power solely from the battery, and a reduced power configuration where the heating regions operate at a reduced power less than the maximum power, based on power solely from the receptacle or power solely from the battery.

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).

The invention discloses an electromagnetic heating circuit, a control method and device of electrical equipment and the electrical equipment. The circuit comprises at least two resonance modules. Each switch module comprises a fixed end, a movable end, a first position end and a second position end; the fixed ends of the at least two switch modules are connected to the at least two resonance modules in a one-to-one correspondence manner; the inversion 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 comparison module is connected to the oscillation driving module; and the control module is connected with the inversion module, the comparison module, the gating module and the at least two switch modules. According to the technical scheme provided by the embodiment of the invention, when part of the resonance modules in the electromagnetic heating circuit are in the heating state, whether cookware is placed at the positions corresponding to other resonance modules which are not in the heating state or not can be detected.

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 induction heating system is provided. The induction heating system includes an induction heating element operable to inductively heat a load with a magnetic field. The induction heating system further includes a power supply circuit coupled to an alternating current (AC) power supply configured to supply a power signal to the induction heating system. The power supply circuit includes an inverter. The induction heating system further includes a conditioning circuit configured to output a derived voltage signal based at least in part on a voltage across a resonant capacitor of the induction heating system. The induction heating system further includes a controller operably coupled to the conditioning circuit and the power supply circuit. The controller is configured to determine one or more operating parameters of the induction heating system based at least in part on the derived voltage signal generated by the conditioning circuit.

An inductive heating device (1) comprisesa device housing (10)a DC power source (11),a power supply electronics (13) comprising a DC / AC inverter (132) including a Class-E power amplifier with a transistor switch (1320), a transistor switch driver circuit (1322), and an LC load network (1323) configured to operate at low ohmic load (1324), the LC load network (1323) comprising a shunt capacitor (C1) and a series connection of a capacitor (C2) and an inductor (L2), anda cavity (14) arranged in the device housing (10), the cavity (14) having an internal surface shaped to accommodate at least a portion of the aerosol-forming substrate (20), wherein the cavity (14) is arranged such that the inductor (L2) is inductively coupled to the susceptor (21) of the aerosol-forming substrate (20) during operation.

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 discloses a handheld transformer rotating handle which comprises a handle assembly arranged outside a small transformer in a sleeving mode and a rotating assembly arranged on the front portion of the handle assembly. The rotating assembly sequentially comprises an inner ring, a rotating ring and an outer ring from inside to outside, wherein the inner ring is arranged on the outer side face of the small transformer in a sleeving mode, the rotating ring is arranged outside the inner ring in a sleeving mode, and the outer ring is arranged outside the rotating ring in a sleeving mode. The handle assembly and the rotating assembly are fixedly connected through a fixing piece. The rear end of the small transformer is connected with the power supply host through a flexible cable, and the front end of the small transformer sequentially penetrates through the handle assembly and the rotating assembly. According to the handheld transformer rotating handle, the rotating assembly capable of steplessly rotating by 360 degrees is made of the POM material with the self-lubricating performance, and the rotating assembly and the handle assembly are combined, so that induction heating power output equipment can be better suitable for handheld operation, and the working efficiency is greatly improved.

The invention discloses a power battery low-temperature heating device and method, and belongs to the technical field of power battery low-temperature heating. The device comprises a controller, a power supply assembly, a switch assembly and a heating ring; the power supply assembly, the switch assembly and the heating ring are connected in series; the heating ring correspondingly surrounds the power battery; the power supply assembly is used for providing alternating current for the heating ring; the controller is electrically connected with the switch assembly and used for controlling the switch assembly to be switched on and switched off. When the switch assembly is closed, an access is formed between the heating ring and the power supply assembly, the heating ring converts high-frequency alternating current into a high-frequency alternating magnetic field, and the high-frequency alternating magnetic field excites and vibrates free charges in the power battery, so that the power battery is heated. According to the invention, high-frequency alternating current can be converted into a high-frequency alternating magnetic field, and free charges in the power battery are excited and vibrated, so that the power battery generates heat, and rapid temperature rise of the power battery is realized.

To provide a determination method capable of accurately determining signs of water leakage from cooling water flowing inside an induction coil.SOLUTION: A determination method for determining signs of water leakage from cooling water flowing inside an induction coil 10 for induction heating includes the steps of (a) acquiring data indicating the state of the induction coil 10, and (b) performing a Welch's t-test based on the data, and determining that there are signs of water leakage when a significant difference is determined to exist.SELECTED DRAWING: Figure 5

The present disclosure relates to an electric range. In the electric range, filter circuits are disposed to gather at an edge of a lower end of a case and are spaced a maximum distance apart from a plurality of working coils, thereby reducing noise generated by the working coils as much as possible and improving performance of the filter circuits.

The invention discloses an induction heating power supply water circulation cooling system and an adaptive control method, and the method comprises the steps: 1) a console issues a control parameter p of an induction heating power supply, and a water circulation system obtains the parameter at the same time; 2) a power consumption prediction model in the water circulation cooling system predicts power consumption P0 to be generated by the induction heating power supply system according to historical parameters when the given value is p; 3) the power consumption prediction model reversely deduces the required cooling water flow Q according to the prediction result P0; 4) according to the flow Q, obtaining a frequency f required by the operation of the frequency converter so as to drive the frequency converter to work; 5) detecting the voltage u, the current i and the temperature value T fed back by the induction heating power supply system in real time by the power prediction model, and correcting f in real time, and 6) storing all parameters p, u, i, P0 and f. According to the invention, the power consumption of the system can be predicted in advance according to the change of the power of the induction heating power supply, then the cooling circulation device is adaptively and synchronously adjusted, and correction is carried out according to the real-time change of the temperature.

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

The utility model discloses an underground electromagnetic heating paraffin removal and paraffin control matching device and system, and belongs to the technical field of oil extraction equipment, the matching device comprises an induction coil and a heating element which emits heat under the action of the induction coil, the heating element is a heating cylinder, the outer side face and the inner side face of the heating cylinder are both provided with a plurality of rib plates, and the rib plates are arranged on the outer side face and the inner side face of the heating cylinder. Each rib plate is of a strip-shaped structure extending in the axis direction of the heating cylinder, and the induction coil is wound on the outer side face of the heating cylinder. The system comprises the matching device, a power supply module and an electric connecting wire. The structural design of the scheme is beneficial to the stability, the service life, the power consumption, the response speed and the continuous production of an oil field of an underground electromagnetic heating paraffin removal and paraffin control matching device and system.

The utility model belongs to electrical equipment, and particularly relates to a silicon carbide inversion induction heating power supply, which comprises a three-phase input circuit, a voltage chopper circuit, a silicon carbide inversion circuit, an output circuit and a connection relation thereof. The high-frequency induction heating power supply adopts the silicon carbide inverter, has the characteristics of large single-tube current, high switching speed, low on-resistance, low failure rate, small switching loss, high temperature resistance and the like, and greatly improves the inversion efficiency and reliability of the high-frequency induction heating power supply; an RDC inversion absorption plate is designed and is specially designed for high-frequency inversion of the SiC module, and due to the fact that the switching speed of the SiC module is high, high voltage can be generated when the SiC module is switched on and off, and the RDC inversion absorption plate can be used for absorption in time; a transformer RC absorption assembly is further designed, is connected in parallel to the two ends of a primary winding of the isolation transformer and is used for absorbing high-frequency parasitic oscillation generated by the primary side of the transformer, preventing the output end of the inverter bridge from generating high-frequency parasitic oscillation current, reducing oscillation current of the SiC module and reducing heating of the SiC module.

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.