6results about How to "Reduce instantaneous current" patented technology

The present application relates to the field of natural gas and oil extraction technology, and discloses a driving device for a natural gas well intelligent flow regulator, including: a housing; a motor, the motor is fixed on the housing; a driving screw, the driving screw is located in the housing, and the driving screw is connected to the output shaft of the motor by transmission; a screw sleeve, the screw sleeve is arranged in the housing, the screw sleeve is threadedly matched with the driving screw, the screw sleeve and the housing can be movably matched, and the screw sleeve is constructed to move along the axial direction of the driving screw when the driving screw rotates; a first elastic energy storage member; and a second elastic energy storage member; wherein the first elastic energy storage member is constructed to apply an elastic reset force to the screw sleeve along the direction from the driving screw to the motor, and the second elastic energy storage member is constructed to apply an elastic reset force to the screw sleeve along the direction from the motor to the driving screw. The driving device for a natural gas well intelligent flow regulator provided by the embodiment of the present application can prevent the motor therein from being impacted by instantaneous large current, thereby improving the service life of the motor.

The invention relates to an anti-single-particle reinforced P-GaN transistor with a periodic PN junction laminated gate structure, and belongs to the technical field of semiconductor devices. The transistor comprises a substrate; a buffer layer formed on the surface of the substrate; a barrier layer formed on the surface of the buffer layer; the source electrode is formed on the surface of the barrier layer; the drain electrode is formed on the surface of the barrier layer; the P-GaN layer is formed on the surface of the barrier layer and is positioned between the source electrode and the drain electrode; the periodic PN junction laminated gate structure is formed on the surface of the P-GaN layer; the grid electrode is formed on the surface of the periodic PN junction laminated gate structure; and the passivation layer is formed on the surfaces of the barrier layer, the source electrode and the drain electrode. Through the built-in electric field formed by the PN junction between the P-GaN layer and the grid electrode, effective constraint on a large number of electrons generated by incidence of heavy ions from the grid electrode is realized, and instantaneous current in the device is reduced, so that the single-particle burning voltage of the device is remarkably improved, and the reliability and the performance of the device are enhanced.

This application relates to the field of motor control technology and discloses a motor control method and system. The motor control method includes: upon detecting an AC zero-crossing, determining the electrical angle increment of the motor relative to the previous AC zero-crossing; determining the electrical angle of the current AC zero-crossing based on the electrical angle of the previous AC zero-crossing and the electrical angle increment; determining the target phase path that needs to be turned on based on the comparison results of the electrical angle of the current AC zero-crossing with multiple conduction control intervals; and controlling the target phase path to be turned on at the current AC zero-crossing. This motor control method, through precise electrical angle tracking and zero-crossing synchronized phase-by-phase conduction control, can reduce the instantaneous current during motor startup, effectively limit current surges, alleviate transient stress on channel devices, lines, and the load body, and achieve soft starting of the motor.

The invention discloses a forming method of a thin film stacking structure and the thin film stacking structure. The method comprises the following steps: forming a first material layer; a second material layer is formed on the first material layer, and the forming method of the second material layer comprises the steps that an initial seed layer is formed on the first material layer through first deposition treatment, the first deposition treatment has a first bias voltage, the first bias voltage is smaller than or equal to a preset voltage, and the initial seed layer is formed on the first material layer; the preset voltage is a deposition process bias voltage with minimum damage to the first material layer; a strengthened seed layer is formed on the initial seed layer through second deposition treatment, the second deposition treatment has second bias voltage, and the second bias voltage is larger than the first bias voltage; and forming a main body layer on the reinforced seed layer. According to the invention, the thickness reduction effect is eliminated, the overall resistance of the phase change memory cell is improved, and the instantaneous current and read interference are reduced.

The invention provides a power management system and a power management method for a handheld terminal, and belongs to the technical field of power management. The system comprises a battery management terminal, a power management module and a battery pack, wherein the power management module is electrically connected with the battery management terminal, the battery pack and a controller. The power management module obtains battery state parameters from the battery pack and reports the battery state parameters, and the battery management terminal generates and issues a battery parameter configuration file and a current limit configuration file. The power management module updates battery pack configuration parameters according to the battery parameter configuration file, compensates the current charge state, and displays the compensated charge state on the terminal; and according to the current limiting configuration file, the working parameters of the power utilization module of the handheld terminal are limited through the controller. According to the method, the electric quantity estimation and current limiting strategy can be dynamically optimized according to the battery state, the accuracy and smoothness of electric quantity display are improved, and the abnormal shutdown risk of the handheld terminal under the low-temperature, high-load and aging working conditions is reduced.

The utility model discloses an internal combustion engine power station starting battery pack parallel connection pre-charging circuit which comprises a pre-charging control module, the positive electrode input end of the pre-charging control module is connected with a first wiring terminal through a starting switch, the negative electrode input end of the pre-charging control module is connected with a second wiring terminal, and the first wiring terminal is further connected with the first voltage detection end of the pre-charging control module. The third wiring terminal is connected with a second voltage detection end of the pre-charging control module, the first wiring terminal and the third wiring terminal are connected through a first switch and a current-limiting resistor which are connected in series, a controlled end of the first switch is connected with a starting switch, and the first wiring terminal and the third wiring terminal are further connected through a second switch. The controlled end of the second switch is connected with the control end of the pre-charging control module. Voltage between the starting battery pack and the parallel battery pack which are externally connected is compared in real time through the pre-charging control module, parallel connection of the parallel battery pack and the starting battery pack is controlled, and safety and reliability of emergency power supply of the internal combustion engine power station are improved.