7results about How to "Reduce the total" patented technology

The application discloses a single-sensor network-configuration type converter and a control method thereof, relates to the technical field of power electronics and power systems, and comprises a power module composed of a plurality of power switches, an alternating-current filter connected between the power module and a power grid, a direct-current link voltage sensor for measuring a direct-current link voltage, a direct-current link current sensor for measuring a direct-current link current, and an alternating-current voltage sensor for measuring an alternating-current side voltage. A controller receives measurement signals from the direct-current link voltage sensor, the direct-current link current sensor and the alternating-current voltage sensor, reconstructs a converter side current from the measured direct-current link current based on a current reconstruction strategy, performs power measurement by using the reconstructed converter side current and the measured capacitor voltage, and generates a control signal to drive on-off of the power switches according to the measured power, a reference value of the measured power and the direct-current link voltage. The method significantly reduces the hardware cost, volume and complexity of the system.

The invention particularly relates to a polarization code PSS-RF-SCL decoding method based on a reliability function. In order to reduce decoding complexity and abandon a traditional path splitting strategy based on a search set, a path splitting strategy based on a reliability function is provided, and according to the strategy, whether information bits need to be subjected to path splitting or not is judged through the value of the reliability function. Secondly, a pruning strategy depending on an auxiliary path metric value is provided, and a PSS-RF-SCL decoding method is provided on the basis of the two decoding strategies for reducing complexity. During decoding, information bits with reliability function values lower than a threshold value alpha are regarded as bits needing path splitting, and paths with auxiliary path metric values higher than a threshold value beta are regarded as unreliable paths to be pruned. The threshold value alpha and the threshold value beta are obtained through statistical experiments. A simulation result shows that compared with a traditional path splitting strategy auxiliary SCL decoding method based on a search set, the provided PSS-RF-SCL decoding method has the advantage that the decoding complexity is obviously reduced on the premise of no performance loss.

The invention relates to the technical field of optical sensor manufacturing, in particular to a wafer OCR character code reader integrated with an illumination function. And the objective lens group, the semi-reflecting and semi-transmitting mirror, the total reflection mirror and the imaging lens group are sequentially arranged along the direction from the object space to the image space. The semi-reflecting and semi-transmitting mirror is traversed by the optical axis of the objective lens group. The light source is right opposite to the wafer marking character area, emitted light sequentially passes through the semi-reflecting and semi-transmitting mirror and the objective lens group to illuminate the wafer marking character area, and light reflected by the wafer marking character area sequentially passes through the semi-reflecting and semi-transmitting mirror, the total reflection mirror and the imaging lens group to be projected to the photosensitive receiver. Thus, on one hand, axial irradiation of a wafer engraved character area is realized, more uniform illumination is provided for the wafer engraved character area, imaging interference caused by surface reflection can be overcome, and wafer engraved character features can be enhanced; on the other hand, all the components are integrated into an independent module, the design structure is compact, and interference from the external environment can be greatly weakened.

This application relates to the technical field of hybrid vehicle transmissions, and discloses a hybrid transmission drive system, which includes an engine and a generator, a drive motor, and a differential arranged around the engine. By integrating the drive motor rotor shaft and the differential coaxially, an independent shaft system is eliminated, and the overall volume is reduced, forming a compact four-shaft layout, which is suitable for small vehicles and solves the problem of the layout of traditional five-shaft transmissions; the drive motor rotor shaft and the first-stage driving gear, and the generator rotor shaft and the power generation driven gear are respectively designed coaxially as a whole, reducing spline fits, improving transmission efficiency and stability, and extending the service life of components; the coaxial design of the drive motor and the differential allows the lower half of the motor to be immersed in the oil, achieving dual optimization of lubrication and cooling, reducing temperature rise, fully lubricating the bearings, and improving motor efficiency; the shaft system is streamlined to 4, the total number of components is reduced, the volume and weight of the housing are reduced, the manufacturing cost is decreased, and maintenance is more convenient.