12results about How to "Improve power factor" patented technology

The utility model relates to the technical field of suspension door controller, concretely to low pressure direct current brushless suspension door controller, include: wide voltage DC / DC module, its input end access 24V~48V power, output 12V direct current voltage, 5V linear voltage stabilizing circuit, its input end is connected with the 12V output of wide voltage DC / DC module, and output end exports 5V direct current voltage. In the utility model, adopt direct current brushless motor, can realize stepless speed regulation, and starting torque is big, and power factor is high, and efficiency is high, can make suspension door in low speed - high speed - low speed arbitrary smooth switching, and running noise is reduced obviously, can reduce mechanical wear and tear, prolong integral machinery life, simultaneously, it need not rely on operating capacitor, is not affected by the influence of the capacitor capacity drop under low temperature environment, can stably operate in various severe weather, and can satisfy long time continuous work demand, solve the existing single -phase alternating -current motor torque unstable, speed is difficult to control, error accumulation influence precision and the problem of normal operation under low temperature.

The utility model provides a kind of charger for realizing high power belongs to charging technical field, including, single-phase full-bridge rectifier main circuit, for converting AC input into DC output, sampling conditioning circuit, the voltage division, filtering, isolation processing to the DC voltage after rectification and input AC voltage, output the sampling signal that meets adder and voltage controller level requirement, voltage controller, receives the voltage error signal generated by adder.According to the fixed conduction time of high-frequency switch tube in rectifier, the energy storage inductance is applied to the principle of volt-second balance, the turn-off time of high-frequency switch tube corresponding to different time is calculated, so that the current on the energy storage inductance always works in critical continuous mode, without adding extra current zero-crossing detection circuit, the circuit complexity is reduced, the reliability is improved, only a separate voltage controller is needed, to realize the high power factor of rectifier net side.

The application provides a direct current coupling light storage system, method, device, electronic equipment and storage medium, comprising: acquiring a power grid state and an energy management mode; when the power grid state is a normal state, performing redundant power supply and guaranteeing power supply through a photovoltaic module, an energy storage system and a power distribution network, and when the power grid state is an abnormal state, performing redundant power supply for an off-grid load through the photovoltaic module and the energy storage system; acquiring operation information of the power grid state, wherein the operation information is obtained by an intelligent electric meter to acquire a power grid voltage, frequency, current and harmonic; if the operation information is within a grid-connected range, performing corresponding energy management on a DC / AC of the power distribution network side according to intelligent electric meter data; if the operation information is outside the grid-connected range, the direct current coupling light storage system is switched from the normal state to the abnormal state, and a control algorithm for stabilizing alternating current voltage and frequency is used to supply power to the off-grid load. The application has the beneficial effects of improving new energy consumption capacity of the direct current coupling light storage system and improving safety of interaction with the power distribution network.

The present application relates to the technical field of energy storage, and provides a three-phase active power independent configuration method for a converter based on a minimum norm solution, constructs the correlation between three-phase current and voltage, establishes a linear equation set according to the KCL current constraint condition and the correlation, solves the linear equation set through a minimum norm solution standard algorithm, generates three-phase current sine reference values based on the output angle of a grid phase-locked loop, separates positive and negative sequence components through a signal delay method, obtains positive and negative sequence voltages by using a double-current loop feedforward decoupling control algorithm, generates voltage values through Park inverse transformation, generates PWM signals to drive the conduction or turn-off of converter power switching tubes according to the voltage values, and outputs three-phase voltages. The present application realizes independent and flexible configuration of three-phase active power and automatic minimization of reactive power, guarantees the real-time performance of control and engineering compatibility, adapts to complex scenarios such as distributed energy access and unbalanced load compensation, and improves the stability of power grid operation and energy utilization efficiency.

This utility model discloses a high-efficiency conversion circuit for a high-frequency resonant LED driver power supply, including a power conversion circuit comprising a PFC relay circuit, a MOSFET driver circuit, a constant current module circuit, a voltage feedback circuit, and a current limiting protection circuit. This high-efficiency conversion circuit for a high-frequency resonant LED driver power supply selects an LLC resonant converter as the LED driver power supply. The power correction circuit and the LLC resonant circuit use a large number of electrolytic capacitors to eliminate noise in the input and output signals, avoiding environmental limitations in practical applications and meeting the needs of highly intelligent, high-power LED power supplies. The LLC resonant converter parameters enable soft-start, thereby reducing switching losses. The PFC relay module corrects the input current. Analysis of the selection of PFC output capacitor and MOSFET parameters improves the circuit's power factor.

The application relates to the motor technical field and provides a motor and controller integrated driving system, which comprises a driving motor, a motor end cover and a rotor assembly, the rotor assembly comprises a rotating shaft and a hybrid rotor installed on the rotating shaft, a controller, the controller comprises a first shell, a second shell, a control module and a rotor position detection device, the first shell and the second shell are arranged on one side of the motor end cover and jointly enclose a containing space together with the motor end cover, the control module and the rotor position detection device are arranged in the containing space, the hybrid rotor comprises a synchronous reluctance rotor section and a permanent magnet rotor section arranged along the axial direction of the rotating shaft, the synchronous reluctance rotor section and the permanent magnet rotor section have the same number of poles, the outer diameter r1 of the synchronous reluctance rotor section is larger than the outer diameter r2 of the permanent magnet rotor section, and 0.5mm < r1-r2 < 0.7mm is met. The overall structure is compact, the torque density is high, the power factor is large, the efficiency is high and the cost is reduced.

This utility model discloses a high-efficiency direct-drive variable frequency permanent magnet motor for mud pumps, relating to the field of permanent magnet direct-drive motor technology. It includes a frame, a motor, and a powerful cooling fan. This utility model employs permanent magnet direct-drive variable frequency technology, eliminating rotor losses in the motor, significantly improving the power factor, and increasing efficiency by 10%-15% compared to traditional motors. This effectively reduces energy consumption and fully complies with national energy conservation and emission reduction requirements. It eliminates the traditional speed-changing mechanism, directly driving the mud pump and avoiding transmission losses from belts, chains, and other components. Compared to traditional transmission methods, transmission efficiency can be significantly improved by 15%-20%, greatly enhancing the overall working efficiency of the mud pump. This utility model has a simple structure, reducing a large number of transmission components and vulnerable parts, lowering the frequency and difficulty of maintenance and repair. The motor adopts a fully enclosed design with a high protection level, effectively preventing dust, moisture, and other external impurities from entering the motor, further ensuring its reliability.

This application discloses a relay intelligent control method and system for AC loads. The method includes the following steps: based on the multimodal data of the relay, predicting and updating the mechanical action delay of the relay; and issuing a drive command before the AC zero-crossing point based on the predicted mechanical action delay after receiving a switching command; using parallel hardware fast protection channels and software diagnostic channels to monitor and protect the relay coil in real time; and constructing a switching control strategy library optimized based on intelligent algorithms learning historical experience to identify the load type in real time and dynamically switch the optimal switching control strategy accordingly. The system is used to implement the above method. The beneficial effects of this application are: by combining the hardware fast protection channel with the software protection channel, the circuit can be immediately cut off in the event of a severe short-circuit fault. The hardware protection operates independently of the controller, and combined with the intelligent diagnostics of the software channel, a dual protection redundancy is formed, significantly improving the system's safety level.

The utility model discloses a kind of power distribution circuit of power quality comprehensive treatment, comprising: incoming line unit, metering unit, intelligent fusion terminal, outgoing line unit and power quality comprehensive treatment unit, incoming line unit is divided into two branches, one is electrically connected to intelligent fusion terminal, another is sequentially electrically connected metering unit and power quality comprehensive treatment unit, power quality comprehensive treatment unit is electrically connected to outgoing line unit;The power quality comprehensive treatment unit includes transformer, reactive power compensation unit, series side power unit and shunt side power unit, the input side of series side power unit is electrically connected to the output end of transformer, series side power unit and shunt side power unit are in series;The present application is by dynamic voltage stabilizing, reactive current compensation and three-phase unbalance comprehensive treatment, significantly improve voltage stability, ensure load side power supply safety, effectively reduce line loss and transformer overload risk.

This invention relates to wireless power transfer technology, specifically a single-tube inverter AC envelope modulation wireless power transfer system and control method. The system includes a transmitter and a receiver. The transmitter includes an input AC power supply, a dual-winding AC transformer, a rectifier and filter circuit, a DC / DC module, a single-tube inverter transmitter circuit, a first control module, and a drive circuit module. The receiver includes a receiving circuit, a high-frequency envelope demodulation network, an electrical load, a zero-crossing detection module, and a second control module. The zero-crossing detection module detects the output envelope voltage state to obtain a control signal, and the first control module controls the step-up / step-down state of the DC / DC module based on the envelope state. The advantages are: compared to traditional AC-AC envelope modulation wireless power transfer systems, it further simplifies the circuit structure, reduces the number of switching devices and the drive circuit, further simplifies the control strategy, reduces the harmonic content on the system input side, increases the power factor, and reduces the impact of the input voltage waveform.

This invention relates to a modular voltage regulator and its control method, as well as a DC power supply system for new energy power. The voltage regulator circuit of the voltage regulator adopts a modular design, and the voltage regulator modules are switched on and off in priority according to the predicted or measured load of the control bus. The voltage regulator controller controls the output of the voltage regulator circuit through the feedback control parameters of the DC / DC converter unit. When the charging circuit is in floating charging or equalizing charging state, the corresponding set feedback control parameters are used. When the charging circuit is in a locked state, the feedback control parameters are determined by the predicted results of the DC bus load or the DC bus load and load change rate, as well as the real-time energy storage of the energy storage circuit. This invention achieves dynamic optimization of the control model and control function, which is beneficial to improving output characteristics, extending product life, and is suitable for applications with limited space and relatively harsh environmental conditions, such as offshore wind power. It can mainly be used as an uninterruptible DC power supply for new energy power systems.