9results about How to "Increase power level" patented technology

The invention relates to the technical field of diesel engine power control, in particular to a control method for reducing plateau power loss of a supercharged diesel engine through EGR. The working condition point of current operation is obtained through the engine rotating speed sensor and the accelerator position sensor, the electronic control unit corrects the main injection advance angle and the rail pressure according to the current altitude, and then the opening degree of the EGR valve is calculated and controlled according to the air amount demand value and the actual air inflow measured by the PFM air flow meter. When the altitude simulation test bench performs external characteristic tests under various altitudes, the main injection advance angle, the rail pressure and the air quantity demand quantity of the diesel engine are continuously debugged by combining the rotating speed of a diesel engine supercharger, the vortex front exhaust temperature and the smoke intensity value tested by the bench, and finally the EGR opening degree value and the external characteristic oil quantity value under the altitude condition are determined. And obtaining the maximum plateau power result under the altitude condition.

The invention discloses a busbar and a converter, and belongs to the field of converters. The busbar comprises a bottom plate; the at least two first connecting ends are arranged on the bottom plate, and the at least two first connecting ends are used for being connected with the multiple bridge arms in a one-to-one correspondence mode; and the second connecting end is arranged on the bottom plate and is used for being connected with an external circuit. According to the busbar, the common end of the power device of the converter is connected through the busbar, wiring can be simplified, the through-current capability is effectively improved, large-area copper laying is not needed, and the heat dissipation capability of a circuit board, the power density of the converter and the capacity utilization rate of the power device in a converter circuit are improved.

This application discloses a multi-degree-of-freedom wave energy and wind energy co-harvesting and power generation device, relating to the field of marine renewable energy development technology. It solves the technical problems of high directional sensitivity, single energy capture dimension, and low energy density per unit area in existing marine energy harvesting devices. This device integrates wave horizontal kinetic energy, vertical potential energy, blade rotational energy, and offshore wind energy into one unit, achieving synergistic conversion through a hybrid mechanical and hydraulic transmission. This significantly improves the energy output rate per unit sea area and can respond to wave and wind energy in any 360° direction, breaking through directional limitations and making it suitable for various application scenarios in both offshore and nearshore areas.

This invention provides a three-phase single-stage multi-cavity parallel power conversion device, comprising: an AC / DC conversion circuit, the input port of which is connected to three-phase alternating current; the output port of the AC / DC conversion circuit including a first terminal, a second terminal, and a third terminal; and a DC / DC conversion circuit including at least three rectifier units, wherein the first input terminal of each rectifier unit is connected to the first terminal via a first switch, the first input terminal of each rectifier unit is connected to the second terminal via a second switch, and the first input terminal of each rectifier unit is connected to the third terminal via a third switch; the output ports of the plurality of rectifier units are connected in parallel. This invention enables power factor correction and output current or voltage regulation, improving the reliability, conversion efficiency, and power density of the power conversion device.

This application relates to the field of switching power supply technology and discloses a gallium nitride (GaN) charger based on a 494 PWM chip. The charger includes a power board, a rectifier circuit module, a half-bridge GaN driver module, a transformer, a 494 chip control module, a totem-pole driver module, an isolation driver transformer, a full-wave rectifier module, a filter circuit module, and a conversion circuit module. The core of this application is that the 494 chip control module generates a PWM signal, which is then amplified by the totem-pole driver module and electrically isolated and coupled by the isolation driver transformer before driving two GaN transistors in the half-bridge topology to switch alternately at high frequency. This application fully utilizes the high-speed switching characteristics of GaN devices, enabling the charger to operate at higher frequencies. This increases the power level to the kilowatt level while reducing switching losses and the size of magnetic components, achieving high power density and high overall conversion efficiency.

The application discloses a kind of control strategy determination method, device and electronic equipment of power distribution system.Therein, the method comprises: receiving and responding to the splitting event signal of power distribution system, obtaining the full amount operating state information corresponding to power distribution system;According to full amount operating state information, the on-off state of controllable line is combined, and power distribution system is divided into multiple initial island sets;According to local operating state information, a multi-agent dynamic frequency response model is constructed;Solving multi-agent dynamic frequency response model, according to the initial total loss value and initial control strategy corresponding to the multiple initial island sets respectively, the updated island set is obtained by updating, and the loss value and control strategy operation are determined iteratively until the target condition, to obtain the target control strategy corresponding to the target island set.The application solves the technical problem that the strategy loss is high when determining the control strategy corresponding to multiple island systems in the related art under the splitting condition.

The invention discloses a high-gain DC-DC converter modulated by an energy storage element, and belongs to the technical field of power management. According to the high-gain boost converter, high-voltage gain is achieved through charging and discharging of the inductor and the capacitor, the number of used capacitors is small, and the reliability of the high-gain boost converter is improved; the stress of the switching device in the embodiment is low under a relatively large duty ratio, and the voltage gain can be improved by utilizing the duty ratio; the driving signals of the two switching tubes are synchronous, so that the control circuit is simpler to realize; the structure is simple, and the total number of used devices is smaller; after the converter is expanded to be multi-phase, the power level of the converter is further improved, and after the switched capacitor of the converter is expanded to be n-order, the voltage of the converter is further improved.

The application belongs to the technical field of electric power, and proposes a rectifier based on a bridgeless AC-DC auxiliary converter and a control method. In the application, the rectifier is composed of a main power converter and a bridgeless AC-DC auxiliary converter, and the two are connected in parallel and operate in parallel. The main power converter adopts a thyristor rectifier to provide main power support for an electrolysis stack. The bridgeless AC-DC auxiliary converter includes low-pass filters, IGBTs, high-frequency transformers, diode rectifiers and other elements. A control unit and a driving unit are responsible for controlling the operation of the rectifier. Through the control algorithm of the sampling circuit and the central processing unit, the output current and the input current of the rectifier can be accurately controlled and compensated, thereby reducing the content of ripples and harmonics in the rectifier. The rectifier and the control method proposed in the application can make the grid-side current distortion small.

The invention discloses a solar array regulator which comprises k stages of power units sequentially controlled by a hysteresis comparator, the input ends of the k stages of power units are connected to a solar array section, and the output ends of the k stages of power units are connected to an HV-BUS high-voltage bus and a main error amplification circuit in parallel. The power unit comprises a shunting part, a DCX push-pull part and a hysteresis comparator, the hysteresis comparator receives a signal of the main error amplification circuit, the DCX push-pull part is used for amplifying an input voltage in an equal proportion according to the turn ratio of a transformer, and control is carried out through the shunting part, the hysteresis comparator and the main error amplification circuit. According to the invention, the SADA can be ensured not to generate high voltage, the power supply safety of the whole satellite is protected, and the power density of the PCU is improved.