229 results about "Voltage rating" patented technology

A converter system, e.g., for vehicle-to-vehicle charging, includes galvanically-isolated modular first and second converters having the same maximum voltage rating, a direct current (DC) voltage bus interconnecting the converters, and an electronic controller. An input voltage to the DC bus is converted into an output voltage via switching control signals to the modular converters. The system's voltage rating may equal the maximum of the input and / or output voltage, or it may equal the maximum input voltage and be about 50-percent of the maximum output voltage. The maximum input and output voltages may be equal. When the voltage rating is about 50-percent of the maximum input voltage, capacitors may be connected in parallel with the modular converters on an input side thereof. Switching circuits may be connected to the bus to control the conversion of the input voltage via switching control signals.

The disclosure provides a power tool and power tool system, including: a first slot and a second slot; when the power tool is in a double-pack working state, battery packs are respectively arranged in the first slot and the second lot; when the power tool is in a single-pack working state, the battery pack is arranged in the first slot or the second slot, and both the double-pack working state and the single-pack working state provides a same rated voltage to the power tool.

The invention relates to the field of power system equipment detection, in particular to a residual magnetism measuring device and method for a large power transformer. The residual magnetism measuring device for the large-scale power transformer comprises the large-scale power transformer, a high-voltage bushing, a high-voltage neutral point bushing, a low-voltage bushing, an iron core outgoing line bushing, a first capacitor, a second capacitor, a detection impedor, a partial discharge instrument and a large-current generator, the capacitance of the first capacitor is 30pf-40pf and is matched with the capacitance of a transformer iron core, and the capacitance of the second capacitor is 300pf-400pf and is 10 times proportional to the capacitance of the first capacitor; the method comprises the following steps: carrying out a long-time induction withstand voltage and partial discharge test after a conventional test, measuring discharge amounts Q1, Q2 and Q3 at 0.5, 1 and 1.5 times of rated voltages, judging residual magnetism according to the difference value of the discharge amounts and an iron core grounding current, and if the residual magnetism exceeds the standard, magnetizing and demagnetizing by using a large current generator at the frequency of 150Hz. The method has the advantages that the residual magnetism is measured and evaluated in time, equipment faults are avoided, operation is easy and convenient, and adaptability is high.

The invention discloses a circuit for a high-voltage direct-hanging electric heater, and the circuit comprises a high-voltage pre-charging module which is used for inputting high-voltage alternating current and suppressing the surge current of the high-voltage alternating current; the full-bridge rectifier module is used for converting the high-voltage alternating current into direct current; the conversion and control module is used for isolating and converting the direct current and outputting rated voltage and required power of the electric heater based on the direct current, the full-bridge rectifier module is connected with the high-voltage pre-charging module and the conversion and control module, and the output end of the conversion and control module is connected with the electric heater.

The invention provides an extra-high voltage hybrid direct current transmission fault recovery optimization control method, device and equipment, and relates to the technical field of extra-high voltage hybrid direct current transmission. The system comprises a plurality of sending end converter stations and a plurality of receiving end converter stations, and the plurality of receiving end converter stations are connected to different alternating current systems in a layered manner; the method comprises the following steps: when a receiving end has a fault, obtaining a sub-module capacitor voltage of a target receiving end converter station; based on the sub-module capacitor voltage and a preset sub-module capacitor rated voltage, calculating a power unbalance amount of the target receiving end converter station; and determining an active power setting value of the target receiving-end converter station based on the direct-current side input power and the power unbalance amount of the target receiving-end converter station, and controlling the target receiving-end converter station based on the active power setting value. According to the method, the fault degree can be prevented from being further deepened, so that the fault recovery speed of the hierarchical access system is accelerated.

The application provides a real-time monitoring device and method for air supplement amount of a Francis turbine unit of a hydropower plant, and relates to the field of Francis turbine units of hydropower plants.The device comprises a thermistor, an air supplement pipe, a current generator, a thermistor temperature sensor, a current regulator and a wind speed regulator, wherein the thermistor is fixed in the middle of the air supplement pipe, and the current generator generates rated voltage to heat the thermistor; the current regulator is used for real-time measurement of output current of the thermistor and records the change frequency of the output current; the wind speed regulator is used for measurement of wind speed at the air supplement pipe opening; and the thermistor temperature sensor is used for measurement of the temperature of the thermistor. The application fixes the thermistor in the air supplement pipe, determines the relationship curve between the air supplement amount and the output current, solves the problem that the air supplement amount of the Francis turbine unit cannot be monitored, and uses the thermistor principle to realize accurate measurement, is durable and not easy to be damaged, is convenient to install, can be introduced into a monitoring system, and can be monitored in real time on a host computer.

Disclosed in the present application is an electric all-terrain vehicle, which comprises a frame, a vehicle body coverage member, a powertrain and an electrical system, wherein the frame comprises a front frame and a rear frame; the vehicle body coverage member comprises a front compartment cover, which covers the front frame; the powertrain comprises an electric motor; and the rated voltage of each low-voltage device in a low-voltage electrical system is less than 36 V, and the rated voltage of each high-voltage device in a high-voltage electrical system is greater than 36 V. The front frame and the rear frames are respectively provided with a low-voltage installation area and a high-voltage installation area. The low-voltage devices in the low-voltage installation area include a low-voltage battery, and further include at least one of a vehicle body controller, a fuse box, an audio power amplifier, an extended power interface, a vehicle diagnosis interface, a gateway, a winch relay, a positioning antenna and a T-BOX. No high-voltage device is disposed in the low-voltage installation area, and the low-voltage installation area can be exposed by means of opening the front compartment cover. The high-voltage devices in the high-voltage installation area include a traction battery, and further include at least one of a direct-current converter, a vehicle-mounted charger and a power distribution unit; and the electric motor is installed in the high-voltage installation area.

The application provides a pre-charging method and system of a motor train unit traction auxiliary converter, the method comprising: closing an output contactor in the traction auxiliary converter according to a received contactor closing instruction; if no pre-charging instruction is received, judging whether to perform a pre-charging process on a direct current capacitor in the traction auxiliary converter according to a voltage of the direct current capacitor and a preset rated voltage; if yes, obtaining three-phase alternating current voltages and three-phase alternating current of an alternating current port of an auxiliary inverter in the traction auxiliary converter, determining active current feedback values and reactive current feedback values, and generating a pulse signal, and sending the pulse signal to the auxiliary inverter, so that an output voltage of a direct current port of the auxiliary inverter reaches the rated voltage. The application realizes the pre-charging function of the converter without increasing the hardware of the converter, reduces the cost, improves the availability of the converter, reduces the current impact of the switching device and the action frequency, helps to improve the service life and reduce the failure rate.

The invention provides an SST driving type high-voltage full-direct-current power supply framework suitable for an MW level computing power cabinet, and belongs to the technical field of data center power supply and distribution. The SST driving type high-voltage full-direct-current power supply framework comprises a solid-state transformer, the solid-state transformer comprises a rectifier and a dual-active-bridge converter which are cascaded, and the rectifier is connected with medium-voltage alternating current of a power grid and used for converting the medium-voltage alternating current into direct current of a first voltage value and outputting the direct current to the dual-active-bridge converter; the dual-active bridge converter is used for converting the direct current of the first voltage value into direct current of a second voltage value and outputting the direct current through the direct current bus, and the second voltage value is smaller than the first voltage value; and the data center load is connected to the direct current bus, and the rated voltage of the data center load is matched with the second voltage value. The MW level computing power cabinet can improve the transmission efficiency, adapts to MW level power density, realizes high-speed dynamic response to adapt to the load characteristics of the AI data center, and is beneficial to saving the space of a machine room and improving the computing power density.

The invention discloses a control method of a hydrogen peroxide device, a control device of the hydrogen peroxide device, the hydrogen peroxide device and ceiling equipment. The method comprises the following steps that refrigeration sheet specification information and working condition information of the hydrogen peroxide device are obtained, the refrigeration sheet specification information at least comprises refrigeration sheet rated voltage and refrigeration sheet rated current, and the working condition information at least comprises electrolytic current; according to the specification information and the working condition information of the refrigeration sheet, the target working state of the refrigeration sheet is determined, and the target working state at least comprises target working voltage and target working current; based on the target working state, a control strategy set is generated, and the control strategy set is at least used for adjusting the working voltage of the refrigeration sheet to the target working voltage and adjusting the working current of the refrigeration sheet to the target working current. The technical problems of electrolyte loss and safety risk caused by the fact that water flows out of a hydrogen peroxide device due to the fact that the condensate water amount is too large in the prior art are solved.

The invention relates to the technical field of energy storage configuration, in particular to a network construction type SVG super capacitor configuration method, system and device based on a direct current side direct-hanging super capacitor and a storage medium. Acquiring grid-connected voltage, target instantaneous active power and continuous discharge time; selecting the specification of a super capacitor monomer, determining a single cluster rated voltage and setting a branch current-limiting threshold value; establishing a single-cluster supercapacitor discharge model, simulating a process from constant-power discharge to a current-limiting threshold value, considering the influence of internal resistance voltage division, calculating single-cluster release energy through power-time integration, and obtaining single-cluster constant discharge power; calculating the number of super capacitor clusters; the number of parallel branches and the number of series clusters are determined by combining the topological direct-current side voltage range of the MMC, and the direct-current side rated voltage is set. By establishing a discharge model considering internal resistance voltage division, accurately calculating the actual discharge capacity of a single cluster, and systematically planning super capacitor configuration in combination with MMC topological characteristics, the problems that an existing method is insufficient in configuration precision and lack of topological adaptability are solved, and the reliability of a network-forming SVG is improved.

The utility model provides an electric tool, and relates to the field of tools. Two battery connection sockets; the first circuit is provided with a first switch; a second line; the two first batteries comprise first connectors which can be inserted into the battery combination hubs and connect the electric energy of the first batteries into the first circuit; under the condition that the first switch is switched on and the second switch is switched off, the two first lines form a parallel circuit to supply power; the second battery comprises a second connector which can be inserted into the battery combination hub and is used for connecting the electric energy of the second battery into the first circuit, and the second connector is not provided with a conducting part; under the condition that the second battery is inserted into the battery combination hub, the first switch is switched off; under the condition that the first switch is switched off and the second switch is switched on, the two first lines form a series circuit through the second line to supply power; the rated voltages of the second battery and the first battery are different. According to the technical scheme, the required voltage or capacity can be obtained.

The invention relates to the technical field of industrial power utilization data processing, in particular to a distributed wind turbine generator multipoint grid-connected voltage cooperative control method and system. Firstly, multi-period historical and real-time data are collected, and dynamic change rules of power grid load, power and droop control coefficients are captured; analyzing the sensitivity and regulation potential of the grid-connected node to the fluctuation of the reactive power and the droop control coefficient, and finding out a key node; in view of the high dynamic state of the power grid and different credibility in different comparison periods, disturbance is applied to a key node droop control coefficient, predicted voltage data is acquired based on operation parameter time sequence data in the comparison periods, and the confidence of the comparison periods is determined by combining the consistency degree of the operation parameters; and finally, screening predicted voltage data by using confidence, comparing the predicted voltage data with a rated voltage to construct an objective function, obtaining an optimal droop control coefficient, ensuring decision stability, dynamically adapting to power grid working condition changes, stabilizing a grid-connected point voltage in a qualified range, and improving grid-connected reliability and anti-disturbance capability.

The application relates to a nanometer relay array voltage regulation method and device and a computer device. The method comprises the following steps: sampling an actual working current of the nanometer relay array according to a preset sampling rule, the preset sampling rule is that the preset sampling frequency is sampled for a preset number of times, but the working current is not correctly sampled, the preset sampling frequency is adjusted and sampling is performed at the adjusted preset sampling frequency until the working current of the nanometer relay array is correctly sampled; determining an operation working voltage of the nanometer relay array according to the actual working current, the operation working voltage is used for representing the actual working voltage size of the nanometer relay array; determining a voltage deviation value of the operation working voltage and a rated voltage of the nanometer relay array; when the voltage deviation value is greater than a preset voltage deviation value, adjusting the working voltage of the nanometer relay array according to the voltage deviation value. The method can accurately regulate the working voltage, and ensures the working stability and reliability.

The embodiment of the invention provides a frequency converter type selection method and device and a motor no-load test method. The model selection method comprises the steps that the selectable range of the rated current of a to-be-selected frequency converter is determined according to the rated voltage and the rated frequency of a motor and the rated voltage and the rated frequency of the to-be-selected frequency converter, and the rated voltage of the motor is larger than the rated voltage of the to-be-selected frequency converter; according to the selectable range of the rated current of the to-be-selected frequency converter and / or the estimated value of the maximum output power of the motor in the operation process of the variable frequency driving motor of the to-be-selected frequency converter from the rated frequency of the to-be-selected frequency converter to the maximum frequency of the motor, determining the selectable range of the rated power of the to-be-selected frequency converter; and on the basis of the optional range of the rated current and the optional range of the rated power of the to-be-selected frequency converters, selecting one to-be-selected frequency converter meeting the verification condition that the allowable minimum leakage reactance of the motor is not greater than the leakage reactance of the motor when the motor is controlled to operate by the to-be-selected frequency converter from the to-be-selected frequency converter pool as the selected frequency converter.

The utility model relates to the technical field of new energy connectors, in particular to a connecting device. The connecting device comprises a plug and a socket, the plug is connected with the socket through a plug bolt mechanism, the socket comprises a copper bar, a threaded column and a copper ring, a connecting hole is formed in the copper bar, the threaded column is connected to the copper bar from the lower portion of the connecting hole to the upper portion in an embedded mode, the threaded column is sleeved with the copper ring, and a groove is formed in the upper edge of the connecting hole and used for welding a welding wire. According to the connecting structure of the copper ring and the copper bar on the socket of the connecting device, the connecting strength and the electric conductivity are better and more stable, the rubber coating part is arranged on the bolt in the plug, damage is caused after improper force operation is encountered, the bolt head composed of the four stand columns is arranged in the rubber coating part, the bolt head is sleeved with the M6 sleeve, and therefore the connecting device is convenient to use. The bolt can be replaced, the rated voltage of the structure is 1000V, the withstand voltage of the structure can reach 5000V, and the stability is higher.

The present invention relates to a method and system for identifying the wiring configuration and voltage rating of an electricity meter. The method involves measuring various voltage values, including phase and line voltages, relative to a virtual neutral point. A controller calculates effective values and phase angles from the measured voltages and performs a multidimensional analysis, including voltage ratio analysis, phase angle analysis, and zero-sequence voltage analysis, to determine the wiring configuration, such as a three-phase three-wire or three-phase four-wire configuration. The method also incorporates a voltage spectrum analysis, utilizing a Fast Fourier Transform (FFT), to determine the voltage rating. Multiple iterations of the identification process are performed to confirm the accuracy of the results. The system includes a voltage measurement unit, a processor, and a memory for executing the method. The invention improves reliability in wiring configuration identification and enables anomaly detection.

A high-voltage and high-current fast fuse comprises an end cover, a contact, a fuse tube, a fuse body, a fuse body guide column, arc extinguishing filler and a fastening screw, characterized in that two or more fuse body guide columns are arranged in the fuse tube, the fuse body is fixed on the fuse body guide column in a spiral winding manner, the contact is provided with a fuse body perforation, the fuse body is welded on the outer end surface of the contact through the perforation, the end cover end surface is overlapped on the outer end of the contact and is connected and fixed with the contact through the fastening screw installed hole of the end cover and the contact and the fastening screw. The disadvantages of poor welding are overcome to the maximum extent. In the case of not increasing the length of the fuse tube or even shortening the length, the rated voltage and the rated current of the fuse can be effectively improved, the anti-impact and anti-bumping capabilities of the fuse are improved, and the fuse can be used to protect the integrated power system of a ship, a large energy storage and power transmission system and other high-voltage and high-current power transmission systems.

A super junction device may be formed by decreasing the width of the P-type region and increasing the doping concentration, allowing for an increased height of the device. However, instead of etching a trench to fill with the P-type material, a trench may be etched for both the P-type and adjacent N-type regions. This allows the height of the device to be increased while maintaining a feasible aspect ratio for the trench. The P-type material may be formed on the sidewall on the trench to be relatively thin. The trench may then be filled with N-type material such that the P-type region fills the space between the N-type regions without any voids or seams, while having a width that would be unattainable using traditional etch-and-fill methods for the P-type region alone. Wide bandgap materials may also be used to increase the voltage rating.

This application relates to the field of microgrid technology, disclosing a power distribution system and method based on bus voltage regulation, as well as a storage medium. The system includes a DC power supply module and an AC power supply module, which are connected to a load via the same bus. The DC power supply module includes a first power adjustment unit, which adjusts the voltage output from the DC power supply module to the bus based on the actual output power and a preset maximum output power. The AC power supply module includes a second power adjustment unit, which adjusts the voltage output from the AC power supply module to the bus to its rated voltage after detecting that the bus voltage has been adjusted, thereby achieving power distribution between the DC and AC power supply modules. In this way, the entire system eliminates the need for communication control between a central controller and a local controller, reducing the system's dynamic response time and improving its responsiveness.

A super junction device with an increased voltage rating may be formed by decreasing the width of the P-type region and increasing the doping concentration, while also increasing the height of the overall device. A trench may be etched for both a P-type region and an adjacent N-type region. This allows the height of the overall device to be increased while maintaining a feasible aspect ratio to fill the trench. The P-type material may then be formed by doping the sidewalls of the trench for a P-type layer that is relatively thin compared to the remaining width of the trench. The trench may then be filled with N-type material such that the P-type region fills the space between the N-type regions without any voids or seams, while having a width that would be unattainable using traditional etch-and-fill methods for the P-type region alone.

The invention discloses a transformer area voltage monitoring method and device based on photovoltaic access, terminal equipment and a storage medium, and belongs to the field of transformer area voltage monitoring. The method comprises the following steps: acquiring rated voltage of each to-be-monitored power transformer area and a plurality of voltage acquisition data of each monitoring point in a preset time period; according to the voltage acquisition data and a rated voltage, determining a corresponding high grid-connected voltage frequency when the voltage acquisition data of each monitoring point is a high grid-connected voltage; taking the current monitoring point as a high-voltage monitoring point under the condition that the high grid-connected voltage frequency is greater than a preset high-voltage frequency threshold value; monitoring the number of high-voltage monitoring points in each to-be-monitored power transformer area; comparing the number of the high-voltage monitoring points with a preset high-voltage point number threshold value; and under the condition that the number of the high-voltage monitoring points is greater than a preset high-voltage point number threshold value, determining that the current to-be-monitored power transformer area is a high-voltage transformer area. According to the invention, the problem that the high voltage of the transformer area caused by photovoltaic access cannot be accurately identified in the prior art can be solved.

This application provides a multi-power supply circuit and a mobile device. The multi-power supply circuit includes: a power switching circuit configured to: when the mobile device is simultaneously connected to any two or more of a first power supply, a second power supply, and a third power supply, select one of the first power supply, the second power supply, or the third power supply as the power source according to the priority order; when the mobile device is only connected to any one of the first power supply, the second power supply, and the third power supply, select the first power supply, the second power supply, or the third power supply as the power source; and a power supply circuit for supplying power to the mobile device by outputting a rated voltage according to the connected power supply, wherein the first power supply is provided by the original first adapter of the mobile device, the second power supply is provided by the second adapter based on the Universal Serial Bus (USB) power supply, and the third power supply is provided by the third adapter based on the Ethernet cable power supply, with the priority order from high to low being the first power supply, the second power supply, and the third power supply.

The invention discloses a charging method and device for starting an auxiliary battery, equipment and a storage medium, and belongs to the technical field of vehicle control. The charging method for the starting auxiliary battery comprises the steps that state information of the starting auxiliary battery in a vehicle is obtained; determining the electric quantity of the starting auxiliary battery according to the state information; when the electric quantity is lower than the electric quantity threshold value, charging the starting auxiliary battery according to the first charging voltage; when the electric quantity reaches an electric quantity threshold value, second charging voltage is determined according to the state information, the second charging voltage is smaller than the first charging voltage, and the second charging voltage is higher than rated voltage for starting the auxiliary battery; and charging the starting auxiliary battery according to the second charging voltage. Through the state information of the starting auxiliary battery, the method can accurately determine the real-time electric quantity of the starting auxiliary state, thereby achieving the differentiated and accurate charging control, and facilitating the prolonging of the service life of the starting auxiliary battery.

This invention discloses a method for determining the status of a new energy grid-connected cabinet based on real-time data, relating to the field of new energy grid-connected cabinet monitoring technology. The method includes the following steps: real-time acquisition of 5-second real-time data and rated voltage and rated power parameters of the new energy grid-connected cabinet; based on the acquired data, the following judgment process is performed on the new energy grid-connected cabinet: an offline judgment is executed based on unchanged data, specifically: if the grid-connected cabinet meets the conditions of unchanged offline data and is currently in a fault state, the grid-connected cabinet is judged to be faulty; if it meets the conditions of unchanged offline data and is currently not in a fault state, the grid-connected cabinet is judged to be faulty. The new energy grid-connected cabinet status determination method proposed in this invention significantly improves the accuracy and reliability of new energy grid-connected cabinet status determination by comprehensively utilizing real-time data acquisition and analysis technology. It not only considers key parameters such as the real-time operating voltage, current, and power of the equipment, but also effectively avoids the misjudgment problems that may arise from traditional fixed threshold judgment methods.

A converter system, for example for vehicle-to-vehicle charging, comprises galvanically isolated modular first and second converters with the same maximum rated voltage, a DC voltage bus connecting the converters, and an electronic control unit. The DC bus input voltage is converted to an output voltage via switching control signals to the modular converters. The system's rated voltage can be the maximum of the input and / or output voltage, or it can be the maximum input voltage and approximately 50 percent of the maximum output voltage. The maximum input and output voltages can be the same. If the rated voltage is approximately 50 percent of the maximum input voltage, capacitors can be connected in parallel to the modular converters on one input side.Circuits can be connected to the bus to control the conversion of the input voltage via switching control signals.

This invention provides a power module operation control method, system, and device, belonging to the field of power electronics technology. The method includes: acquiring the topology of the power module and the converter branch current; when no fault occurs, using the rated voltage of the capacitors in the power module as a reference value, standardizing the capacitor voltages in per-unit increments, and performing a converter branch nearest-level approximation modulation algorithm to obtain a first trigger pulse; when a fault occurs and the capacitor voltage exceeds a preset threshold, reducing the voltage of the module capacitors according to the topology and converter branch current to obtain a second trigger pulse; when the voltage does not exceed the preset threshold, using the second voltage as a reference value, obtaining a third trigger pulse through a second per-unit value; and outputting the corresponding trigger pulse. This technical solution enables operation of the power module under fault conditions, thereby reducing the failure rate of the power module and improving the utilization rate of power devices.

The application relates to a zero-voltage step-up control method and system for a hydropower plant, which comprises the following steps: controlling the rotating speed of a generator set to a rated rotating speed, and establishing an electric circuit for zero-voltage step-up; based on a zero-voltage step-up starting instruction, controlling an excitation system to gradually increase the voltage of the generator set from zero to a rated voltage according to a preset step-up strategy, and collecting operating parameters of the generator set; judging whether the operating parameters of the generator set exceed a safety threshold; if yes, performing a safety intervention operation; otherwise, after the voltage of the generator set is increased to the rated voltage, ending the step-up and generating test data. According to the application, based on the zero-voltage step-up starting instruction, the excitation system gradually increases the voltage of the generator set from zero to the rated voltage according to the preset step-up strategy, and the operating parameters of the generator set are collected synchronously, so that the control logic of the step-up process is solidified into a system program, and the step-up rate fluctuation and step omission caused by experience difference or negligence in manual operation are eliminated.

The invention provides a lightning arrester rated voltage selection method and a lightning arrester rated voltage selection system for suppressing operating overvoltage. The method comprises the following steps: establishing a corresponding electromagnetic transient model based on actual parameters of a power grid for suppressing the operating overvoltage; simulation is carried out based on the voltage transient model, and power frequency overvoltage characteristic data of the power grid under the fault working condition are obtained; determining a rated voltage selectable range of the lightning arrester according to the power frequency overvoltage characteristic data; performing operation overvoltage simulation on the lightning arrester corresponding to each rated voltage in the rated voltage selectable range, and determining a rated voltage candidate value of the lightning arrester; checking and verifying the lightning arrester meeting the rated voltage candidate value, and outputting the optimized rated voltage of the lightning arrester. By adopting the rated voltage of the lightning arrester selected by the method and the system provided by the invention, the operating overvoltage level can be obviously reduced, a closing resistor can be canceled in a line with a certain distance, the insulation margin is improved, and the method is scientific and strong in operability.

The invention relates to the field of kitchen appliances, in particular to a beverage making method of a liquid heater, which comprises the following steps: presetting a plurality of temperature rise reference slopes corresponding to different making capacities under rated voltage; based on the heating duration of heating the beverage from the first temperature to the second temperature under the dynamic voltage, obtaining a detection slope; according to the voltage difference between the rated voltage and the dynamic voltage, a compensation slope is obtained, the detection slope is compensated, and a compensated slope is obtained; and according to the relationship between the compensated slope and the temperature rise reference slope, obtaining the making capacity of the beverage for making the beverage. According to the beverage making method adopting the liquid heating heater, the problem that beverage making is abnormal due to inaccurate making capacity detection caused by unstable and fluctuating mains supply voltage can be effectively solved, and the safety risks that the beverage is not cooked or overflows and the like are effectively solved.