339 results about "Frequency changer" patented technology

The invention provides a flywheel energy storage system with an electromagnetic coupler, which comprises a motor, a flywheel rotor, the electromagnetic coupler, a frequency converter and a generator, and is characterized in that the motor is connected with the flywheel rotor to drive the flywheel rotor to rotate, the electromagnetic coupler comprises an outer rotor and an inner rotor, and the outer rotor sleeves the inner rotor and is spaced from the inner rotor; the flywheel rotor is in transmission connection with the inner rotor, the inner rotor generates a rotating magnetic field to drive the outer rotor to rotate, and the frequency converter is connected with the outer rotor to change the current frequency of the outer rotor so as to change the magnetic field rotating speed matched with the current, so that the mechanical rotating speed of the outer rotor is kept constant. The generator generates power, accesses the power grid and inputs electric energy with stable frequency into the power grid, the requirement of power transmission to the power grid is met, power electronic devices are not needed, rotational inertia in the power grid can be improved, necessary voltage and frequency support is provided for the power grid, and the capacity of the power grid for efficiently accepting new energy is improved.

According to one embodiment of this application, a testing method for a braking unit is provided. The braking unit to be tested is connected to the DC bus of a frequency converter, and the frequency converter is connected to a motor. The motor is driven to accelerate to a preset speed. An emergency stop operation is performed on the motor, causing the motor to generate energy feedback to the DC bus of the frequency converter, thereby causing the DC bus voltage to rise. By monitoring the DC bus voltage, when the DC bus voltage rises to a preset threshold, the braking unit is triggered to operate, consuming the feedback energy in the braking resistor of the braking unit. By adjusting the emergency stop time of the motor, the feedback energy consumed by the braking unit is controlled, thereby enabling the testing of different braking powers of the braking unit to be tested. This method improves the accuracy and versatility of the test and is more user-friendly. This application also provides a testing system for a braking unit.

This invention provides a dual-end driven long shaft system multi-order torsional vibration test platform and a torsional vibration identification and suppression method, relating to the field of long shaft system variable frequency drive technology. The platform includes two dual-winding drive motors respectively located at both ends of the shaft system, a load motor located in the middle, and a switchable shaft system connection structure, along with a dual-master, dual-slave cooperative control system composed of four drive frequency converters. This method achieves controllable excitation of multi-order torsional vibration by superimposing the load torque step and the frequency excitation source. It utilizes differential amplification and dual-channel filtering in the signal processing module to extract speed fluctuation characteristics, accurately identifying the critical speeds of each order in the system. For the identified torsional vibration phenomenon, a speed differential negative feedback algorithm is used to correct the torque command of the frequency converter, and the torsional vibration energy of the elastic transmission chain is offset by actively enhancing the system's electrical damping. This invention solves the problem of reproducing complex torsional vibration under safe and controllable conditions and verifying suppression strategies in ultra-large generator units.

This invention discloses a voltage source static frequency converter system for pumped hydro storage and its grid-connected control method. The system includes an input reactor, a phase-shifting transformer, a high-voltage frequency converter, an output reactor, a grid-connection switch, an output switch, a signal acquisition unit, and a control unit. The input terminal of the phase-shifting transformer is connected to the power grid through the input reactor, and its output terminal is connected to the input terminal of the high-voltage frequency converter. The output terminal of the high-voltage frequency converter is connected to a motor through the output reactor. The output switch is located between the output reactor and the motor. The grid-connection switch is located between the motor and the power grid. The signal acquisition unit is used to acquire the three-phase voltage and current signals at the input terminal of the phase-shifting transformer, and the output voltage and current signals at the output side of the high-voltage frequency converter. The control unit is connected to the signal acquisition unit and is used to perform grid-connected control based on the signals acquired by the signal acquisition unit. This invention has advantages such as low cost and no motor idling during grid connection.

The application provides a construction elevator regenerative electric energy self-adaptive feedback energy-saving system and method based on bus voltage time sequence feature working condition recognition, and belongs to the technical field of building construction energy saving. The system comprises a construction elevator without counterweight, a working condition intelligent recognition module, an energy feedback system, a construction site 380V power frequency power grid and a multiplex terminal. The construction elevator is the main body of energy recovery, the working condition intelligent recognition module collects the instantaneous value of the frequency converter direct current bus voltage of the construction elevator, the duration of the bus voltage being continuously higher than the reference threshold value, calculates the voltage change rate, identifies three working conditions of heavy load descent, no-load ascent and braking based on a weighted multi-parameter discrimination algorithm, and dynamically matches the start-stop voltage threshold value of the corresponding energy feedback system according to the working condition recognition result. The application solves the tedious problem of traditional manual measurement of threshold value, realizes dynamic threshold value matching maximum feedback efficiency, realizes efficient recovery of energy, does not modify the original system, has an extremely simple structure, has high intelligence, and is safe and reliable in operation.

The utility model belongs to vector frequency changer equipment technical field especially saves energy and protects the environment vector frequency changer, including vector frequency changer body, the inside fixedly connected with two mounting blocks of vector frequency changer body is provided with cooling water tank between two mounting blocks, the upper surface fixedly connected with the water outlet of cooling water tank, the inside fixedly connected with the water outlet pipe of water outlet, the other end fixedly connected with the cooling pipe of water outlet pipe, the upper surface fixedly connected with the water inlet of cooling water tank, the inside fixedly connected with the water inlet pipe of water inlet, the other end fixedly connected with the other end of cooling pipe of water inlet pipe, the inside of vector frequency changer body is provided with the slot. The utility model brings the inside of cooling water into cooling pipe through water outlet pipe, carries out the cooling to the inside of vector frequency changer body through cooling pipe, and the cooling water will pass water inlet pipe and return to the inside of cooling water tank after encircling a circle, to this to circulate cooling, avoids the normal use of vector frequency changer.

The utility model discloses a brake device, system and continuous casting machine variable frequency brake system of frequency converter relates to frequency converter brake field, and the first end of processor is connected with the first end of contactor's auxiliary contact, and the second end of processor is connected with the first end of relay's coil, the second end of contactor's auxiliary contact is accessed first power voltage, and the coil of relay is used for when the high level of processor output, and the coil of relay is used for after the power of the coil of relay, and the auxiliary contact of relay is used for after the power of the coil of relay, and the coil of contactor is used for after the power of the coil of contactor, and the main contact of contactor is used for after the power of the coil of contactor, and the brake resistance is used for after the main contact of contactor closes, and the feedback electric energy of the direct current side of frequency converter is consumed. The application can be in transmission roll way deceleration or the brake resistance of parking fast investment through the collaborative control of processor, relay and contactor, and the feedback electric energy of the direct current side of frequency converter is effectively consumed, and the overvoltage damage frequency converter is prevented.

The utility model discloses a kind of internal electronic device partition installation type frequency converters, its shell is separated into left side chamber, middle air duct and right side chamber by left, right partition, left side chamber sets up rectifier module group and direct current contactor, right side chamber sets up drive board and IGBT module group, air duct installs radiator, capacitor group transversely penetrates air duct and is fixed between left, right side partition, realize that rectifier module group and IGBT module group share radiator;Shell top is equipped with protective piece and receives control panel, inlet group external fan group brings in airflow and carries away heat.The utility model concentrates high heating element in air duct both sides by partition installation, utilizes shared radiator and fan group to realize high-efficiency heat dissipation, avoid heat interference;Control panel is independently laid in top protective piece, and optimization space utilization rate;The utility model is in guaranteeing heat dissipation performance, through structure optimization makes overall layout compact, reduce the volume of frequency converter, it is favorable to reduce cost.

The utility model belongs to the technical field of electronic circuit, especially relates to a passive low harmonic frequency converter special for rail transit air conditioner. The frequency converter includes: passive filter module, rectifier module, precharge module, voltage-sharing filter module, inverter module and control module. The input end of passive filter module is connected to the output end of alternating -current source, and the output end is connected to the input end of rectifier module, and the output end of rectifier module is connected to the input end of precharge module, the output end of precharge module is connected to the input end of voltage-sharing filter module, the output end of voltage-sharing filter module is connected to the input end of inverter module, and the output end of inverter module is the voltage output end of passive low harmonic frequency converter special for rail transit air conditioner, and inverter module and control module are connected through inverter control and protection circuit. The utility model can reduce the harmonic interference of frequency converter inverter to input power grid, protects the electrical equipment on power grid, and improves the security of operation.

The application discloses a kind of magnetic suspension ORC units and control method, it is related to low-temperature waste heat power generation technical field;The unit includes magnetic suspension motor, turbine, evaporator, preheater, condenser, liquid storage tank, working medium pump and control system;Magnetic suspension motor is coaxial direct connection with turbine, and constitutes oil-free integrated closed structure;Control system includes PLC controller, four-quadrant frequency converter, turbine inlet regulating valve, hot gas bypass valve and sensor assembly;PLC controller inside preset turbine performance curve and working medium property model, configured to: real-time calculation turbine import and export pressure ratio, query performance curve to determine the best speed target value, through adjusting turbine inlet regulating valve control magnetic suspension motor speed track the target value.The application solves the problems of large mechanical friction loss, high maintenance cost and low variable condition efficiency of existing ORC unit, and realizes efficient and stable operation of the unit under wide operating conditions through collaborative control strategy.

The utility model discloses a kind of double radiator frequency converters, the double radiator frequency converter, including box, air inlet, air outlet, fan and main loop element, air inlet and air outlet are respectively set in the two sides of box, fan is set in box and its output end is towards air outlet;It further includes at least two element radiators, the number of main loop element is multiple, multiple main loop element is respectively pasted on two element radiators;Air inlet, fan and air outlet form air duct, two element radiators are respectively set in the two sides of air duct, and main loop element is located outside air duct.The heat dissipation efficiency of the two element radiators of the utility model is higher than the heat dissipation efficiency of single element radiator of same volume, and multiple main loop elements are respectively set on two element radiators and located outside air duct, so that main loop element can be dispersed to heat dissipation, thereby effectively reduce the situation that local heat flow density is too high, avoid the failure of main loop element due to local high temperature zone.

A method, apparatus, medium, and product for analyzing the oxidation degree of desulfurization slurry are disclosed, relating to the field of flue gas desulfurization technology. The method involves obtaining detection index values ​​of the desulfurization slurry; calculating the rate of change and fluctuation amplitude of each detection index value within a preset time window, and combining the rate of change and fluctuation amplitude into a condition feature vector; if the current desulfurization system is determined to be in a quasi-steady-state operating cycle, the original oxidation index is compensated and corrected using interference parameter values ​​to obtain a corrected oxidation index; if the current desulfurization system is determined to be in a dynamic disturbance cycle, a correction model for the index value corresponding to the dynamic disturbance cycle is determined, and the original oxidation index is input into the correction model to obtain the corrected oxidation index; based on the corrected oxidation index, the oxidation degree of the desulfurization slurry is determined, and the frequency converter frequency or inlet guide vane opening of the oxidation fan is adjusted based on the oxidation degree. Implementing this application improves the accuracy of analyzing the oxidation degree of desulfurization slurry.

This invention provides a rapid granulated fertilizer forming device, belonging to the field of granulated fertilizer production. It includes a hollow column, with a forming mechanism for rapid fertilizer forming on the outside of the hollow column. A stabilizing component to enhance the stability of the hollow column is located at its bottom. Through the forming mechanism, raw materials with a moisture content of 20%–30% are fed into the hollow column through a feeding cylinder. The material is conveyed by spiral blades, ensuring uniform and continuous material transport. The cutting speed of the cutting blade can be flexibly adjusted via a frequency converter to meet the production needs of granulated fertilizers of different specifications, improving the applicability and production efficiency of the equipment. The formed granulated fertilizer quality is relatively stable. The stabilizing component ensures the stability of the device during operation, reducing the risk of accidental movement.

This invention relates to the field of high-pressure steam drum water level regulation technology, and particularly to a collaborative control method for water level control. This method regulates the high-pressure steam drum water level by selecting different control strategy combinations based on the turbine load, the operating mode of the high-pressure main feedwater pneumatic regulating valve, and the operating mode of the high-pressure feedwater pump frequency converter. This achieves collaborative control of the high-pressure steam drum water level. The operating modes of the high-pressure feedwater pump frequency converter include single-impulse mode, three-impulse mode, and open-loop mode. The operating modes of the high-pressure main feedwater pneumatic regulating valve include single-impulse mode and three-impulse mode. This collaborative control method significantly optimizes regulation quality, achieves full-condition automatic control, frees up manpower, improves automation levels, enhances unit operation safety and economy, and solves the industry problem of poor water level regulation quality and reliance on manual labor during unit load fluctuations.

This utility model belongs to the technical field of feed pumps, specifically relating to a feed device for demineralized water in a polymerization unit. It includes a base, with a feed pump mounted on the upper end of the base. A frequency converter is in contact with the front of the base and electrically connected to the feed pump. A quick-release mechanism is shared between the frequency converter and the base. An air pump is fixedly installed on the inner bottom of the base, with a connecting pipe fixedly connected to its input end. By adding a frequency converter to the base for mounting the feed pump and providing a corresponding quick-release mechanism, the starting current of the feed pump is significantly reduced, resulting in smooth motor operation. Furthermore, the locking pin can be released or secured simply by pushing the push frame, thanks to the snap-fit ​​engagement between the positioning block and the mounting base, combined with the spring reset function of the inclined seat. This convenient and tool-free operation facilitates subsequent maintenance of the frequency converter.

A stepless adjustable constant power load, comprising a power resistance adjustment device, a heat dissipation system, and a controller. The power resistance adjustment device comprises at least three fixed-value resistors having different resistance values, and a primary-circuit frequency converter; each fixed-value resistor is connected in series with a contactor to serve as a load module, and load modules are connected in parallel; an input end of the primary-circuit frequency converter is connected to a test power supply, the load modules are connected in parallel and then connected to an output end of the primary-circuit frequency converter, and the primary-circuit frequency converter serves as an adjustable-voltage power consumption unit. The controller selects a loading combination from the load modules on the basis of the magnitude of a target power, the loading combination is configured to enable combined power consumption to be less than the target power and a difference between the combined power consumption and the target power to be the minimum, and the controller outputs a PWM signal to adjust an output voltage of the primary-circuit frequency converter until power consumption of the primary-circuit frequency converter is equal to the difference.

A variable frequency drive (VFD) includes a rectifier, a filter, an inverter, a capacitor bank, and a control circuit. The rectifier converts AC power from a power supply into DC power on a DC bus, which is then filtered. The inverter converts the DC power into three-phase AC power for output to the electric motor. The capacitor bank has one or more capacitors connected to the DC bus. This capacitor bank can store regenerative energy on the inverter's DC bus and supply the stored DC power to the DC bus for conversion back to three-phase AC power to drive the electric motor. The control circuit pre-charges the capacitor bank using AC power from the power supply. The control circuit monitors one or more parameters of the VFD and detects one or more fault conditions associated with the monitored parameters.

This invention discloses a gas extraction pumping station based on a wet Roots vacuum pump, belonging to the technical field of gas extraction equipment. It adopts a separate arrangement of the main skid and control skid, physically isolating the wet Roots vacuum pump, drive motor, frequency converter, and programmable logic controller (PLC), effectively reducing electromagnetic interference and improving control stability. During operation, the inlet negative pressure sensor monitors the gas emission in real time. The PLC compares the measured negative pressure with the target value and dynamically adjusts the motor speed via the frequency converter. Simultaneously, the exhaust pressure sensor, linked to the pneumatic vent valve, provides overpressure protection, and the vortex nozzle injects water to ensure wet explosion-proof protection. Multiple safety protections are constructed in conjunction with the temperature control unit and water-sealed flame arrestor. This invention achieves efficient, energy-saving, and safe and stable operation of gas extraction through intelligent closed-loop control and structural optimization.

A positioning device for installing a high-voltage frequency converter includes a frequency converter cabinet, multiple sets of reinforcing crossbeams disposed on the inner side of the frequency converter cabinet, and a detachable positioning device disposed inside the frequency converter cabinet. The positioning device includes a suspension rod, a sliding groove, and a moving device. The moving device includes an L-shaped plate and a first moving wheel. A right-angle plate is also provided at the bottom of one side of the L-shaped plate. Two single plates of the right-angle plate have hollow mounting grooves. A limit rod is provided inside the mounting groove. A rotating base is fitted on the surface of the limit rod near the right-angle end of the right-angle plate. A drive shaft is rotatably mounted on the surface of the rotating base. A second moving wheel is mounted in the middle of the drive shaft. The second moving wheel cooperates with the side edge of the reinforcing crossbeam. This utility model, by providing a movable positioning device on the upper surface of the reinforcing crossbeam on the side of the frequency converter cabinet, enables the high-voltage frequency converter to move arbitrarily, thereby assisting in positioning during the installation of the high-voltage frequency converter.

The utility model discloses a device for synchronously controlling a withdrawal and straightening machine and a dummy bar of a continuous casting machine. The device comprises a potentiometer, a PLC (Programmable Logic Controller) control system, a signal isolation module, a withdrawal and straightening machine frequency converter, a dummy bar frequency converter and a digital display instrument. The potentiometer is connected to an analog quantity input port of the PLC control system through the one-input one-output optoelectronic isolator and is used for inputting an initial control signal; the output end of the PLC control system is connected with the withdrawal and straightening machine frequency converter and the dummy bar frequency converter to drive the two frequency converters to operate. A feedback signal of the withdrawal and straightening machine frequency converter is divided into two paths to be transmitted to the PLC control system and the withdrawal and straightening machine digital display instrument through the one-input two-output isolator, and a feedback signal of the dummy bar frequency converter is directly accessed to the dummy bar digital display instrument. The device eliminates electromagnetic interference through a photoelectric isolation module, integrates a water distribution model and a molten steel temperature data interface, adopts a standardized interface design for hardware, is adaptive to different continuous casting machine models, has the characteristics of strong anti-interference capability, stable signal transmission and visual real-time monitoring, and effectively improves the operation reliability of equipment.

The utility model relates to the field of air blower, concretely relates to an air suspension air blower frequency converter independent cooling structure, it includes the box, install the baffle for separating the inside space of box into main chamber and vice chamber in the box, install the air blower host in the main chamber, install the frequency converter in the vice chamber, install the air outlet pipe that communicates with the vice chamber on the box, install the frequency converter cooling fan for sending the heat dissipation airflow in the frequency converter into the air outlet pipe in the vice chamber, the air inlet and the air outlet of frequency converter have, the air inlet of frequency converter cooling fan connects the air outlet of frequency converter, the air outlet of frequency converter cooling fan connects the air outlet pipe, the air outlet of frequency converter is located the upper portion of frequency converter, frequency converter cooling fan installs in the upside of frequency converter, the air inlet of frequency converter is located the side portion of frequency converter, be equipped with the air inlet window on the box, the air inlet window communicates with the vice chamber, this air suspension air blower frequency converter independent cooling structure can reduce the mutual interference between frequency converter and host, improve the heat dissipation efficiency, prolong its life.

The application provides a high-temperature pressure swing adsorption pure oxygen production equipment, which comprises a filter, an inlet of the filter is connected with an air pipeline, an outlet of the filter is connected with an inlet of a blower, an outlet of the blower is connected with an inlet of an air buffer tank, the blower is connected with a frequency converter, an outlet of the air buffer tank is connected with a first inlet of an adsorption tower, a second inlet of the adsorption tower is connected with an outlet of an oxygen back flushing tank, an outlet of the adsorption tower is connected with an inlet of a vacuum pump, an inlet of the oxygen back flushing tank is connected with an outlet of an oxygen buffer tank, the oxygen buffer tank is connected with an oxygen analyzer or a chromatograph and an oxygen flow meter, an outlet of the oxygen buffer tank is connected with an air outlet pipeline, and an outlet of the vacuum pump is connected with the air outlet pipeline. The application uses the principle of pressure swing adsorption, proposes a novel pressure swing adsorption process and equipment, breaks through the limitation of product oxygen purity, and obtains oxygen with a purity of ≥99.5%, thereby expanding a new application field of the pressure swing adsorption oxygen production process.

The present disclosure relates to a continuous biomass hydrothermal liquefaction reaction intelligent control method and system, comprising: real-time monitoring of biomass feed solid content and feed flow rate by mass flow meter, dynamic adjustment of feed flow rate by feed pump frequency converter combined with pre-input material characteristic parameters, control of reaction residence time; based on real-time sampling data and feed flow rate, dynamic adjustment of reaction temperature and reaction pressure by prediction model, and adjustment of discharge valve opening to optimize reaction residence time; real-time monitoring of flow rate, regulating valve opening, separation temperature, separation pressure and liquid level of gas-liquid separation buffer tank and solid-liquid separation buffer tank, automatic adjustment of regulating valve opening according to separation pressure of gas-liquid separation buffer tank and solid-liquid separation buffer tank, and staged recovery of heat by three-stage cooler; judging whether the current key parameters exceed the warning value, if yes, triggering an emergency alarm signal and emergency process. The present disclosure improves the intelligence and safety of the continuous biomass hydrothermal liquefaction reaction process.

This invention relates to the field of aquaculture equipment technology, and discloses a shaftless pump for water temperature regulation and an aquaculture system using the shaftless pump. The system includes: a longitudinally arranged cylindrical body with an open bottom; multiple nozzles arranged circumferentially on the upper side wall of the cylindrical body; an annular outer rotor rotatably connected to the cylindrical body; a multi-pole permanent magnet stator fixedly embedded in the cylindrical body on the outer circumferential surface of the outer rotor, with the stator and the multi-pole permanent magnet radially opposite each other; a shaftless rotor impeller connected to the outer rotor for rotation under the drive of the outer rotor to transport water; and a frequency converter electrically connected to the stator windings for vector and torque control to achieve smooth start-stop and speed regulation. This shaftless pump aquaculture system can efficiently, environmentally friendly, and safely regulate water temperature; the entire water temperature regulation can be automatically closed-loop controlled, and temperature regulation can be achieved without reducing oxygen levels, ensuring the healthy growth of aquatic organisms.

The application discloses a rescue and flood drainage vehicle, which comprises a chassis, a power generation system, a flood drainage system and a heat dissipation system. The chassis comprises a vehicle frame and a power system. The power system comprises an engine and a transmission assembly arranged on the vehicle frame. The output end of the engine is connected with the input end of the transmission assembly. The power generation system comprises a generator and a control cabinet. The generator and the control cabinet are arranged on a vehicle cabin respectively. The power input end of the generator is connected with the output end of the transmission assembly. The control cabinet comprises a rectifier circuit, a three-level inverter circuit, an output breaker and a frequency converter. The input end of the rectifier circuit is connected with the power output end of the generator. The output end of the rectifier circuit is connected with the input end of the three-level inverter circuit. The input end of the frequency converter is connected with the output end of the three-level inverter circuit through the output breaker. The output end of the frequency converter is connected with the flood drainage system. The heat dissipation system is used for dissipating heat of the engine and / or the generator and / or the control cabinet. The generator drives the flood drainage system through the transformation of the control cabinet.

This utility model discloses a protection mechanism for a frequency converter, including a front cover and a rear housing with a rectangular opening, a sealing assembly between the rectangular openings of the front cover and the rear housing, and a wiring assembly mounted on the rear housing. The sealing assembly includes a rectangular sealing ring with a U-shaped cross-section, and a rectangular convex ring extending in the same direction as the rectangular sealing ring. The rectangular convex ring is fitted into an annular sealing groove. A wiring hole is provided at the lower end of the rear housing. The wiring assembly includes a wiring tube and a sealing plug. A through-hole is provided at the center of the sealing plug. The sealing plug and the wiring tube are interference-fitted to compress and deform the sealing plug, forcing the through-hole to gradually narrow and eventually close or tend to close. The sealing assembly and the wiring assembly respectively form a complete seal between the front cover and the rear housing, and between the wiring harness and the wiring hole, preventing dust or moisture from contacting the frequency converter in the rear housing, thus improving the safety and practicality of the frequency converter.

The application discloses a three-winding three-phase variable-speed magnetic suspension asynchronous motor, which comprises a three-winding stator and a fixed-pole rotor. The three-winding stator comprises a stator core and a stator winding, wherein the stator core is made of silicon steel sheets, and the stator winding is composed of a torque winding, a suspension force winding and a speed regulating winding. The suspension force winding is embedded in the inner layer of the stator slot, and the torque winding and the speed regulating winding are embedded in the outer layer of the stator slot in a phase-to-phase distribution mode. The fixed-pole rotor comprises a rotor core and a plurality of insulated rotor coils, wherein the rotor core is made of silicon steel sheets, and the insulated coils are wound in a special structure to form a closed loop and are sequentially embedded in the rotor slot. The rotor coil with a special connection mode is used to replace the traditional squirrel-cage rotor, so that the defects of the traditional speed regulating method of the magnetic suspension asynchronous motor, such as high cost, complex technology and harmonic generation of a frequency converter, can be effectively solved, and the problem of the induced current of the suspension force winding is considered.

This invention belongs to the field of energy-saving control technology, specifically relating to an energy-saving control method for using a high-voltage frequency converter in a large mining ball mill. The method involves controlling the roller to swing back and forth via the frequency converter, incorporating the start-up control sequence and manually set parameters into the frequency converter's application program. The principle is to utilize potential energy to achieve energy savings, and the controllable starting current also reduces harmonic impacts on the power grid. Furthermore, the frequency converter's internal algorithm collects the bus current to identify the working state of the mixed ore material inside the roller, thereby automatically adjusting the speed to achieve optimal working efficiency.

The utility model relates to electronic equipment installation technical field discloses an electronic equipment mounting device, including main part assembly and positioning assembly, main part assembly includes installation frame and frequency converter, the frequency converter sets up in installation frame, positioning assembly sets up in installation frame, including clamping piece and limiting piece, clamping piece sets up in installation frame, limiting piece is located clamping piece one side, the utility model has the advantages that: through the setting of positioning assembly, the quick positioning and installation of frequency converter can be realized, the cumbersome step of traditional screw or bolt fastening installation mode is avoided, thereby improve installation efficiency, and can adapt to different size specifications's frequency converter, strengthen the applicability and flexibility of installation structure, make it not need to use a large number of tools and time, reduce maintenance cost.