7results about How to "Good current equalization effect" patented technology

This utility model relates to a gas cooling and scrubbing tower, belonging to the field of gas purification technology. It includes a tower body, an air inlet, an air outlet, and a liquid outlet, located on the side, top, and bottom of the tower body, respectively. Between the air inlet and outlet within the tower body's internal cavity, a first spray device, a uniform flow water curtain layer, and a second spray device are sequentially arranged from bottom to top. The uniform flow water curtain layer includes a uniform flow water curtain baffle, and a water curtain regulating component is arranged above the baffle. This utility model utilizes the uniform flow water curtain baffle and the second spray device to repeatedly deflect, mix, cool, and scrub dust-laden gas, solving the problems of gas flow deviation, poor cooling and scrubbing effects in existing hollow cooling and scrubbing towers. It has the advantages of high scrubbing efficiency, low resistance, no clogging, simple structure, and easy maintenance.

The application provides a DC energy storage system anti-sampling drift current sharing control method and system, comprising the following steps: S1: based on a DC network type energy storage system containing multiple energy storage converters, an equivalent circuit model of the multiple parallel energy storage converters is constructed; S2: based on an active voltage disturbance method, load impedance of the DC network type energy storage system is estimated according to the equivalent circuit model of the multiple parallel energy storage converters; S3: each energy storage converter respectively calculates a current reference value of DC network type energy storage system current sharing according to a local estimated value of the load impedance, and respectively calculates a line voltage drop value that needs to be compensated based on the current reference value; and S4: based on the calculated line voltage drop value that needs to be compensated, the influence of the line impedance on the DC bus voltage is offset.

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.

An integrated rectangular disc finned tube comprises a base tube and a plurality of parallel rectangular disc fins which are located on the outer contour of the base tube and form an integrated structure with the base tube. The gap between every two adjacent rectangular disc fins is 0.2-50 times of the thickness of each rectangular disc fin, and the diameter of each rectangular disc fin does not exceed 10 times of the diameter of the base tube. According to the integrated rectangular disc finned tube, the rectangular section is easy to manufacture, the flow equalizing effect is good, the heat exchange efficiency is good, machining forming is facilitated, the production efficiency is high, machining stress is reduced, working media are evenly distributed, the heat exchange uniformity is improved, dust accumulation is reduced or even avoided, contact thermal resistance is eliminated, the heat transfer efficiency is high, stability is high, and the service life is long; and a self-rectification effect is achieved on smoke, and airflow flowing is facilitated. The heat exchanger can be widely applied to the technical field of heat exchangers.

This invention discloses a multi-chip parallel orthogonal current sharing module and its fabrication method. The module provides a first chip layer where the lower power semiconductor devices are arranged in a planar symmetrical layout, and the vertical positions of each lower power semiconductor device correspond to the corresponding upper power semiconductor device. Due to the vertical position correspondence combined with the planar symmetrical layout, the inductance of each path within the first and second chip layers is consistent, thus easily achieving a better current sharing effect. Furthermore, the metal pads connected to the lower part of the decoupling capacitor, which are set in the copper plate holes at the AC end, are arranged parallel to each lower metal pad. This allows the decoupling capacitor to have reverse mutual inductance with each lower power semiconductor device. The upper metal pads of the capacitor are also arranged parallel to the upper metal pads of the capacitor, thereby achieving reverse mutual inductance between the decoupling capacitor and each upper power semiconductor device. This, in turn, cancels out the vertical path mutual inductance, achieving the goal of reducing parasitic inductance.

This invention discloses a DC-DC converter and control method based on coupled inductors, comprising a capacitor connected in parallel across the low-voltage side; the capacitor is also connected in parallel across the high-voltage side; the coupled inductor module includes a first winding and a second winding mounted on the same magnetic core, one end of the first winding being connected to the midpoint of a first switch and a second switch, and one end of the second winding being connected to the midpoint of a third switch and a fourth switch; the other ends of the first winding and the second winding are connected to form a common connection point, which is connected to a reference potential terminal on the high-voltage side; the high-voltage side transmits electrical energy to the high-voltage side through the first bridge arm, the second bridge arm, and the coupled inductor module; this invention winds two inductors on the same magnetic core to form mutual inductance, replacing two independent filter inductors or energy storage inductors in traditional circuits with coupled inductors, significantly reducing the size and weight of magnetic devices and increasing power density.

The invention provides a motor controller, a power system and a vehicle, and relates to the technical field of motors, the motor controller comprises a direct current bus capacitor unit, the direct current bus capacitor unit comprises a first capacitor and a second capacitor which are connected in series, the first capacitor and the second capacitor are adjacent, and at least parts of the first capacitor and the second capacitor are oppositely arranged; the first connecting bar assembly is used for connecting the first capacitor and the second capacitor in series; and the power unit is electrically connected with the first connecting bar assembly. According to the motor controller, the internal stray inductance of the motor controller can be reduced, the working efficiency of the system is improved, and the model selection cost of the bus capacitor and the power module is reduced.