8results about How to "Reduce current shock" patented technology

The application provides a kind of intelligent switch cabinet operation control system and method, including control unit, operating current acquisition module, soft start control unit, motor control unit, software anti-misoperation logic module, wherein, software anti-misoperation logic module is used to verify circuit breaker opening and closing state, electric chassis pose state, electric grounding knife opening and closing state and network cabinet door opening and closing state;Control unit is deployed in power monitoring system safety I area, and control unit is connected and interacted with remote host computer or sequential control host computer through communication interface, and communication interface supports the transmission of single task single command, combined task single command and combined task combined command, operating current acquisition module real-time acquisition motor operating current and wave recording, and wave recording data is uploaded to remote host computer or sequential control host computer for verification through communication interface.The application has low cost, with operating wave recording, soft start, multiple anti-misoperation and motor protection functions, to meet the requirements of "power monitoring system safety protection regulations" partition.

The invention discloses a self-adaptive control method and system for primary frequency modulation of a power grid, and relates to the technical field of power system automation and new energy grid-connected control, and the method comprises the following steps: when the energy storage residual electric quantity is within the range of 15%-25%, the energy storage output power is greater than 30% of the rated power, and the absolute value of the frequency deviation of the power grid is greater than 0.08 Hz, controlling the frequency of the power grid; the fixed virtual inertia is replaced with a two-dimensional matrix changing in real time along with the residual electric quantity and the direct current bus voltage, virtual capacitance current in the direction for preventing the direct current bus voltage from dropping is synchronously generated, and the magnitude of the virtual capacitance current is in direct proportion to the change rate of the direct current bus voltage; in the cliff interval with the energy storage residual electric quantity of 15%-25%, the phenomenon of undervoltage locking at the moment of primary frequency modulation high-power discharge caused by fixed virtual inertia is thoroughly eliminated, the frequency secondary collapse probability is reduced to zero, and no hardware is added.

This application relates to an intelligent seedling raising device for aquatic plant seed bank germination experiments, belonging to the field of seed cultivation technology. It includes a cultivation box with wheels, internally equipped with multiple layers of clamps, on which culture dishes containing cultivation troughs and germination paper are placed. An intelligent camera is fixed by a mounting bracket and faces the culture dishes to acquire images. A nozzle can move vertically under the action of a drive mechanism and spray water mist onto the culture dishes. A humidity sensor monitors the humidity inside the box. A heating and cleaning mechanism is linked to the nozzle position; when the nozzle is to the side of the camera, it is in a retracted state to ensure lens imaging; when the nozzle moves down below the camera, the mechanism unfolds and forms a shielding space, spraying and heating air onto the lens to remove moisture and impurities, keeping the lens clear. This device, through the coordinated action of multiple mechanisms, balances water supply, environmental control, and image quality to a certain extent, facilitating the stable conduct of aquatic plant seed germination experiments.

The application discloses a control method for reducing energy consumption of a variable-frequency refrigerator, which judges the temperature difference of an environment sensor, a refrigeration sensor and a freezing sensor, combines to judge the refrigerator load condition, controls the compressor rotating speed, controls the temperature difference of the opening and stopping point of the non-freezing chamber, increases the frequency of the opening and stopping of the non-freezing chamber air door, reduces the temperature fluctuation of the non-freezing chamber, balances the load of each chamber, reduces the starting load, thereby reduces the starting power loss, and realizes the reduction of energy consumption.

The invention provides a low-electromagnetic-noise wave-losing induction cooker, which comprises an LC resonance circuit, an IGBT module, an MCU unit, a gate drive IC and a pot detection circuit, and is characterized in that the MCU unit is connected with the IGBT module through the gate drive IC; the driving voltage range of the IGBT module is 9-18V, and the gate driving IC has a plurality of power supply modes within the driving voltage range of 5-18V; a power judgment module is arranged in the MCU, and when the power judgment module detects that the working power of the induction cooker is lower than 50% of the maximum power, the MCU controls the gate drive IC to be switched to a 9V power supply mode; when the power judgment module detects that the working power of the induction cooker is greater than or equal to 50% of the maximum power, the MCU unit controls the gate drive IC to be switched to a 18V power supply mode; when the pot detection circuit works, the MCU unit controls the gate drive IC to be switched to a 9V power supply mode. According to the low-electromagnetic-noise wave-losing-mode induction cooker provided by the invention, through wide-voltage IGBT model selection and the design of the special driving control module, flexible switching of driving voltage is realized, noise generation is inhibited from the source, and the use experience is improved.

The invention relates to a soft start circuit for a flyback switching power supply, and the circuit comprises a control chip which is configured to monitor a voltage value fed back from a secondary side of an isolation conversion module through a feedback end in a power-on process of the isolation conversion module; the current limiting loop comprises at least one current limiting resistor and a relay, the relay comprises a magnetic attraction switch and a control coil, and the magnetic attraction switch is configured to connect the at least one current limiting resistor between the positive electrode of the high-voltage battery and the power input end of the control chip in series when the isolation conversion module is powered on; and the feedback control loop is connected between the feedback end of the control chip and the control coil of the relay, and is configured to electrify the control coil of the relay when the voltage value received from the feedback end exceeds a set value so as to switch off the magnetic attraction switch. The invention also relates to a flyback switching power supply comprising the soft start circuit.

The application discloses a lower limb auxiliary driving mechanism and a robot, which comprises a thigh assembly and a lower leg assembly connected with the thigh assembly, and a connecting end of a thigh connecting piece two and the lower leg assembly forms a knee joint. In the application, a constant force load mechanism is arranged on the thigh assembly, constant tension of a spring is converted into a compensation torque acting on the knee joint, so that the compensation torque can directly offset part or all of the bending moment generated by the weight of the lower limb on the knee joint, thereby realizing accurate compensation of the static load of the knee joint, reducing the driving burden when the joint maintains a posture, and the constant force load spring serves as a parallel auxiliary execution mechanism and jointly bears the load of the knee joint with a motor driving system. Through the parallel sharing mode, the joint load originally borne by the motor can be reasonably distributed, the motor works in a relatively stable and high-efficiency interval more, peak load is reduced, current impact is reduced, and overall driving efficiency is improved.

This application discloses an image sensor, its readout method, and an electronic device, relating to the field of image sensor technology. The image sensor includes: a pixel array comprising multiple basic pixel units arranged in m rows and n columns; the pixel array is divided into an effective pixel area and an edge weakly photosensitive pixel area; wherein the edge weakly photosensitive pixel area includes at least a first row of basic pixel units and a first column of basic pixel units; the basic pixel units in the effective pixel area are used for photosensitive sensing and conversion into effective color pixel signals; the first row of basic pixel units and the first column of basic pixel units are configured with weak light-transmitting filters; the weak light-transmitting filters are blue filters or red filters; a control module electrically connected to the pixel array; capable of reducing signal bandwidth and reducing the requirements for the setup time and driving capability of the driving circuit.