502results about "Ohmic-resistance heating circuits" patented technology

The invention relates to the technical field of power grid deicing, in particular to an alternating current short circuit ice melting control method and an ice melting distribution transformer. The invention discloses a distribution transformer with voltage reduction and ice melting dual functions, an ice melting control system and a control method thereof. The transformer is provided with two groups of low-voltage output ends which are respectively used for power distribution, power supply and ice melting operation; the ice melting control system comprises a local intelligent control box and a far-end communication control box, and adopts a deep reinforcement learning model to calculate an optimal ice melting power gear and ice melting time; according to the control method, environment parameters and equipment parameters are obtained, cooperative control of the boundary switch, the ice melting switch, the protection switch and the short circuit switch is combined, and accurate adjustment of the ice melting process is achieved. The system realizes a one-key ice melting function, has the characteristics of simple operation, high ice melting efficiency, remote control and the like, remarkably improves the intelligent level, safety and reliability of power grid ice melting operation, and provides an innovative solution for anti-ice management of a power system.

Proposed are a heater circuit capable of controlling a plurality of heater elements connected in parallel without a diode, a controlling method of the heater circuit, and a substrate processing apparatus. The heater circuit for heating a substrate in the substrate processing apparatus includes a direct current (DC) power source configured to supply a DC voltage, with negative electrode thereof connected to ground, a front-end switch array including front-end switches connected in parallel to a positive electrode of the DC power source, a heater array including heater elements each of which has a front end connected to the front-end switches, a ground switch array including ground switches connected in parallel between rear ends of the heater elements of the heater array and the ground, and a rear-end switch array including rear-end switches connected in parallel between the positive electrode of the DC power source and the ground switches.

The invention relates to the technical field of engine blades, and discloses an electric heating assembly for ice prevention and removal of an engine blade and a preparation method and application of the electric heating assembly. The electric heating assembly and the engine blade are conformal, the long edge of the short axis direction of the engine blade is parallel to the first direction, and the second direction is perpendicular to the first direction; the electric heating assembly comprises a plurality of electric heating pieces which are sequentially arranged in the second direction and connected through a parallel circuit, each electric heating piece is provided with two second edges oppositely arranged in the second direction, and the second edges are parallel to the first direction; the electric heating piece comprises a conductive fabric, and the conductive fabric comprises a fiber fabric and a graphene electric heating layer conformally wrapping the fiber fabric. The electric heating assembly has good heat distribution uniformity, and the anti-icing and de-icing effects of the engine blade can be improved.

The invention relates to the technical field of PTC heaters, in particular to a PTC heater output power control method and system, and the method comprises the steps: obtaining the target power, the high-voltage current value and the high-voltage voltage value of a PTC heater, calculating the difference value between the current output power of the PTC heater and the target power, and dynamically adjusting the PID parameters of a PID controller according to the difference value. Finally, the output power is stabilized to the target power, the core of the method is to realize the function of dynamically adjusting the PID parameters, and the problem of overlarge power fluctuation caused by the change of environmental factors can be effectively solved; compared with traditional fixed PID parameter control, the method has the advantages that when environmental factors change, the output power can be stabilized to the target power within a short time through dynamic adaptation of parameters, the flexibility of a closed-loop control system is remarkably improved, and stable operation of the PTC heater under complex working conditions is guaranteed.

An aerosol-generating device is provided, including: a first power supply and a second power supply; and electric circuitry including a controller to supply electrical energy from the first and the second power supplies to an electric heater, the first and the second power supplies are different types of power supplies, the first power supply being a Li-NMC, a Li-LCO, a Li-NCA, or a LiPo battery, the second power supply being a LiFePO4 battery, the controller to provide power to the heater according to a predetermined heating profile including at least first and second heating stages in which a different amount of heating power is provided to the heater, the first heating stage being a preheating stage for preheating the at heater up to an operation temperature, and the second heating stage being an operation stage in which the device is configured to generate an inhalable aerosol.

A nicotine e-vaping device includes a heater, a power control circuit, and a memory module. The heater element is configured to heat nicotine pre-vapor formulation. The power control circuit is coupled to the heater element through a wire. The power control circuit is configured to apply a pulse width modulated power signal to the heater element through the wire, and to receive information over the wire. The memory module is configured to detect a plurality of pulses in the pulse width modulated power signal, record information based on the detected plurality of pulses, and output the recorded information to the power control circuit via the wire.

Flash Joule heating (FJH) for production of one-dimensional (1D) carbon and / or boron nitride nanomaterials, and 1D materials integrated with 0D, 1D, 2D, and 3D nanomaterials, composites, nanostructures, networks, and mixtures thereof. Such materials produced by FJH include 1D carbon and hybrid nanomaterials, boron nitride nanotubes (BNNTs), turbostratic boron-carbon-nitrogen (BCN), doped (substituted) graphene, and heteroatom doped (substituted) re-flashed graphene.

The invention discloses a control circuit and method for preventing battery heating from being out of control and a storage medium. One end of the control circuit is connected with the positive electrode of a battery, and the other end of the control circuit is sequentially connected with a main relay, a controllable fuse, a heating relay, a digital potentiometer, a heating film and a diverter in series to be connected to the negative electrode of the battery; the battery management system BMS is connected with the temperature sensing array, the main relay, the controllable fuse, the heating relay, the digital potentiometer and the shunt; the temperature sensing array is arranged near the battery; the battery management system BMS is set to control the main relay and the heating relay to be closed and control the circuit to be switched on; when the battery temperature reaches a threshold value, the digital potentiometer is controlled to increase the resistance value, so that the heating film reaches the safe heating power density; or the heating relay and / or the main relay are / is controlled to be switched off; or the controllable fuse is controlled to be fused; according to the invention, through dynamic threshold grading protection, multi-parameter collaborative fusing and distributed temperature sensing technologies, rapid blocking of abnormal temperature rise and active prevention of thermal runaway can be realized.

A system, including a ceramic base and a resistive heating trace embedded in the ceramic base. The resistive heating trace includes a plurality of elongated parallel trace segments, where each trace segment extends across a major surface of the ceramic base. The resistive heating trace further includes a first terminal coupled to a first elongated parallel trace segment of the plurality of elongated parallel trace segments and disposed a first radial distance from a center of the ceramic base. The resistive heating trace further includes a second terminal coupled to a second elongated parallel trace segment of the plurality of elongated parallel trace segments and disposed a second radial distance from the center of the ceramic base.

A nicotine e-vaping device includes a heater, a power control circuit, and a memory module. The heater element is configured to heat nicotine pre-vapor formulation. The power control circuit is coupled to the heater element through a wire. The power control circuit is configured to apply a pulse width modulated power signal to the heater element through the wire, and to receive information over the wire. The memory module is configured to detect a plurality of pulses in the pulse width modulated power signal, record information based on the detected plurality of pulses, and output the recorded information to the power control circuit via the wire.

A thermal gradient management assembly comprising a functional component. The functional component includes an exterior facing segment, where the exterior facing segment is configured to experience aerodynamic heating, and an interior segment with the exterior facing segment, where the interior segment is configured for isolation from the aerodynamic heating. The functional component includes a thermal gradient extending between the exterior facing segment and the interior segment. The thermal gradient management assembly also comprises a gradient mitigating heating system includes a power source and a gradient heating element in communication with the power source, wherein the gradient heating element is coupled with the interior segment. The gradient heating element is configured to diminish the thermal gradient between the exterior facing and the interior segments.

An article of clothing including a torso body having a front and a rear, a heating array coupled to the torso body, a battery receptacle configured to receive a battery pack and supply electrical energy to the heating array, a control button assembly positioned on an upper corner of the torso body, and a cable extending from the control button assembly away from the front of the torso body to connect the control button assembly to the heating array.

Features relating to a cartridge for use with a vaporizer body are provided. The cartridge mates with the vaporizer body in a cartridge receptacle. The cartridge may include a cartridge body defining a reservoir configured to contain vaporizable material; a mouthpiece coupled to a proximal end region of the cartridge body; at least one proximal absorbent pad wedged within an internal volume of the mouthpiece; a mouthpiece seal with sealing ribs; a cannula defining a vaporization chamber extending through the cartridge body; a resistive heating element; a porous wick configured to draw the vaporizable material in the reservoir towards the vaporization chamber; an internal sealing gasket positioned in a distal end region of the cartridge body; a lower support structure positioned in the distal end region of the cartridge body; and at least one distal absorbent pad configured to wedge within a recess located in the lower support structure.

A portable hand warmer charging case includes a case body. A placement chamber configured to place a hand warmer unit for charging is provided on the case body. The case body is provided with a first circuit board, a first charging unit, and a first battery. The first battery and the first charging unit are electrically connected to the first circuit board. When the hand warmer unit is placed in the placement chamber, the first circuit board is configured to output electrical energy, which is output by the first battery, from the first charging unit; and the first charging unit is configured to be adapted to a second charging unit on the hand warmer unit for use and transmit the electrical energy output by the first circuit board to the second charging unit on the hand warmer unit.

A system and a method for controlling a power MOSFET for limiting electromagnetic interference from a load is provided. The system and method include a pulse-width-modulated (PWM) control voltage to operate the power MOSFET in accordance with its Ohmic region (linear mode). By operating the power MOSFET in its Ohmic region, the electromagnetic field generated by the load is reduced, without requiring a dedicated DC / DC converter that would otherwise increase the cost, size, and weight of the power electronics.

A heater includes a plurality of heat-generating cells partitioned by a boundary line arranged on a base body, and includes one resistive heating wire formed in each heat-generating cell and having a zig-zag shape as a whole, the resistive heating wire formed by connecting a parallel wiring and a turn-back wiring formed so as to turn back the parallel wiring in a vicinity of the boundary line between adjacent heat-generating cells. In the adjacent heat-generating cells, the resistive heating wire of a heat-generating cell has an extension portion extending the parallel wiring past the boundary line, and the resistive heating wire of the other heat-generating cell is shortened or deformed so that a wiring of a portion facing the extension portion maintains an electrical insulation with the extension portion. The resistive heating wires of the adjacent heat-generating cells include extension portions alternately in a boundary line direction.

Methods of flash-within-flash (FWF) Joule heating and the systems thereof. The FWF Joule heating process subjects outer feedstock in an outer vessel to a flash Joule heating process, whereby the flash Joule heating process upon the outer feedstock results in the conversion of inner feedstock within an inner vessel (which inner vessel is within the outer vessel) to a converted material.

Systems, devices, and techniques for heating a sample are described. A heating assembly can include a membrane. The membrane can include carbon nanotube material. The heating assembly includes a support, mechanically coupled with the membrane. The support can be configured to integrate with a charged particle beam system. The heating assembly also includes a heating circuit, electrically coupled with the membrane. The heating circuit can be configured to direct an electrical current through the membrane.

A portable hand warmer charging case includes a case body. A placement chamber configured to place a hand warmer unit for charging is provided on the case body. The case body is provided with a first circuit board, a first charging unit, and a first battery. The first battery and the first charging unit are electrically connected to the first circuit board. When the hand warmer unit is placed in the placement chamber, the first circuit board is configured to output electrical energy, which is output by the first battery, from the first charging unit; and the first charging unit is configured to be adapted to a second charging unit on the hand warmer unit for use and transmit the electrical energy output by the first circuit board to the second charging unit on the hand warmer unit.

A safe heating circuit, comprising a PTC electric heating element; a first switching element, configured to switch on-off a power loop of the heating element; a first voltage acquisition circuit, configured to sample a first temperature voltage; an NTC element configured to receive a leakage current; a second voltage acquisition circuit, configured to sample a second temperature voltage; and a controller, configured to compare the first or second temperature voltage to a set temperature voltage and output the on-off signal, the second voltage acquisition circuit comprises a voltage divider circuit and a third current limiting circuit, and a second filter circuit; one signal input terminal is coupled to the second filter circuit to receive a sampling signal; and a current flow-in terminal of the third current limiting circuit is coupled to a power terminal, and a current flow-out terminal is coupled to the connection terminal.

The present application relates to the technical field of electric heating elements, and discloses an all-ceramic heating element, which includes an outer heating layer, an inner insulating layer (3) and an inner heating layer, wherein the inner heating layer, the inner insulating layer (3) and the outer heating layer are sequentially arranged from inside to outside; the outer heating layer is electrically connected to the inner heating layer; and the weight ratio of ceramic materials of an outer resistive layer (4) and an inner resistive layer (2) is: silicon nitride:silicon carbide:aluminum oxide:yttrium oxide:lanthanum oxide:molybdenum disilicide=(500-700):(100-300):(40-80):(50-90):(0-30):(500-800), and the ratios thereof for the outer resistive layer (4) and the inner resistive layer (2) are different. The heating element has integrated heating and temperature-sensing functions, is not affected by an external environment, can realize reliable heating or ignition, and has a reliable service life.

A heating device comprises a support, an electrically insulating base insulation layer, and at least one heating conductor circuit on this base insulation layer. The heating conductor circuit includes at least one heating conductor and electrical connections thereon. An electrically insulating secondary insulation layer is arranged on the support below the base insulation layer and between the base insulation layer and the support. An electrically conductive conductive layer is distributed over the substrate such that the base insulation layer is directly adjacent to the conductive layer. A protective earth (PE) connection is provided on the support or on the secondary insulation layer and is connected to ground. A fusible link is provided between the conductive layer and the support or the PE connection, respectively, as the sole electrical connection between the conductive layer and the support or the ground connection.

The invention discloses a stretch-resistant bending-resistant cable and temperature control type production equipment thereof, and relates to the technical field of stretch-resistant bending-resistant cables and temperature control type production equipment thereof.The cable is segmented in the axial direction, a pixelated heating ring belt base body is arranged outside a main conductor bundle in each segment, a fan-shaped cavity is formed in the base body, and Bi-Sn arc segment pixels are embedded in the fan-shaped cavity; the two layers of flexible printed electrode sleeves form an A-layer axial bus and a B-layer axial bus, the A-layer axial bus and the B-layer axial bus are connected with the arc section only in the section in a penetrating welding hole mode, and no middle hole exists outside the section and electrical interruption is achieved. And the dielectric isolation film realizes interlayer insulation. And the gating target section and the angle belt are connected in parallel for heating, so that the Bi-Sn is subjected to phase change softening and then is cured for shape locking, and local thermal shaping and peak clipping stress are completed. And an elastic encapsulating layer, a mechanical bearing and balancing base layer and a temperature bar code residual stress sheath are coated outside, and are matched with weaving and an outer sheath to prolong the fatigue life. The production equipment comprises an extrusion station, an embedding station, a rolling and welding station, a bar code writing station, an online detection station and a take-up section cutting station, and machine vision alignment ensures in-section conduction and inter-section isolation.

Disclosed is an aerosol-generating device comprising: a heating unit for heating an aerosol source; a first temperature sensor for measuring a temperature change at a measurement site associated with heating by the heating unit; the first AD conversion circuit is used for converting the output voltage of the first temperature sensor into digital data; the second temperature sensor is used for measuring the temperature change of the heating unit; and a second AD conversion circuit for converting an output voltage of the second temperature sensor into digital data, in which the first AD conversion circuit has a higher conversion accuracy than the second AD conversion circuit, and the second AD conversion circuit has a faster conversion speed than the first AD conversion circuit.

A method for controlling a temperature of a heater including a resistive heating element includes measuring a voltage count and a current count based on data from an analog-to-digital converter (ADC) circuit of a sensor circuit electrically connected to the heater, the method includes selecting one or more dynamic gain levels for the ADC from among a plurality of dynamic gain levels based on a shift gain correlation, determining a resistance value of the resistive heating element based on the voltage count, the current count, and the one or more dynamic gain levels, and controlling power to the heater based on the resistance value.

A self-heating control circuit includes a control module configured to obtain a cell temperature of each of two battery packs connected in parallel and send a trigger signal in response to the cell temperature being lower than a threshold. The two battery packs include a first battery pack and a second battery pack. The control circuit further includes a switch module disposed at a charging and discharging circuit of the first battery pack. A control terminal of the switch module is connected to the control module and is configured to cut off the charging and discharging circuit upon reception of the trigger signal. The control circuit also includes an excitation module configured to form a path with the two battery packs upon cut-off of the charging and discharging circuit, and generate an excitation current, so that the excitation current flows back and forth between the two battery packs.

Various articles and methods for controlling an amount of thermal energy generated by the articles are disclosed herein. For example, an article can include a power source and a flexible circuit electrically coupled to the power source. The flexible circuit can include a trace including a deformable conductor. The trace can define a plurality of switchbacks. The plurality of switchbacks can be configured to generate a predetermined amount of thermal energy when a voltage from the power source is applied to the trace.

The present invention provides a heating apparatus for heating a load. The heating apparatus comprises a heater having a heating element for receiving electrical power and for converting the electrical power into heat to heat a heating surface of the heater. The heating apparatus also comprises a temperature sensor for sensing and outputting a measurement of the temperature of the heating element, a power actuator for providing the electrical power to the heating element of the heater, a power sensor for sensing and outputting a measurement of the power provided to the heating element by the power actuator, and control circuitry for controlling the power actuator to control the power delivered by the power actuator to the heating element. The control circuitry is configured to receive the temperature measurement from the temperature sensor, receive the power measurement from the power sensor, combine the temperature measurement and the power measurement, and control the power actuator in dependence upon the combined temperature measurement and power measurement. This ensures that the temperature of the heating surface is constant throughout a period when the load is applied.

The present invention provides a heating apparatus for heating a load. The heating apparatus comprises a heater having a heating element for receiving electrical power and for converting the electrical power into heat to heat a heating surface of the heater. The heating apparatus also comprises a temperature sensor for sensing and outputting a measurement of the temperature of the heating element, a power actuator for providing the electrical power to the heating element of the heater, a power sensor for sensing and outputting a measurement of the power provided to the heating element by the power actuator, and control circuitry for controlling the power actuator to control the power delivered by the power actuator to the heating element. The control circuitry is configured to receive the temperature measurement from the temperature sensor, receive the power measurement from the power sensor, combine the temperature measurement and the power measurement, and control the power actuator in dependence upon the combined temperature measurement and power measurement. This ensures that the temperature of the heating surface is constant throughout a period when the load is applied.

A liquid heating appliance for making a beverage, the liquid heating appliance comprising: a plurality of heating components for heating a liquid, where at least a first of the plurality of heating components is powered using mains power, a power management system, wherein the power management system comprises: a controller, and an energy storage device, wherein the controller is arranged to: control an amount of the mains power applied to the first of the plurality of heating components, control an amount of stored power from the energy storage device to be applied to at least a second of the plurality of heating components, and switch polarity of the voltage of the stored power from the energy storage device to be applied to the second of the plurality of heating components after one or more heating cycles associated with the second of the plurality of heating components.