41results about How to "Avoid charging and discharging" patented technology

The invention discloses a data line driving method and a driving unit, a source electrode driver, a panel driving apparatus and a display apparatus. Power consumption generated because of charging and discharging of a parasitic capacitor on data line can be reduced. The data line driving method comprises the following steps: determining whether it is in blank time between two frames; if it is the blank time, outputting a preset voltage signal to a data line; if it is not the blank time, outputting a gray-scale voltage signal to the data line.

The invention discloses a composite power energy management prediction control system of a pure-electric vehicle. The system comprises a motor, a power storage battery and a super capacitor, wherein the power storage battery and the super capacitor are connected with a motor drive control device through a bidirectional DC-DC (direct current) converter respectively; the motor drive control device is connected with the motor; and the system also comprises a microprocessor control system and a vehicular navigation system, a switch pedal potentiometer, a brake pedal potentiometer, a motor detection unit, a power storage battery energy management system and a super capacitor energy management system connected with the microprocessor control system. The system disclosed by the invention can make full use of energy resources, improve energy recovery, increase the once-charge travel distance of the electric vehicle, protect the storage battery, prolong the service life of the storage battery and enhance the power performance of the whole electric vehicle.

The invention discloses a hybrid energy storage system for stabilizing a wind power fluctuation. The hybrid energy storage system aims at solving the problems of complicated structure and working state optimization of an energy storage system in the prior art. The hybrid energy storage system comprises a supercapacitor, a storage battery and a hysteresis comparison controller, wherein the supercapacitor and the storage battery are cascaded; and the hysteresis comparison controller is connected with the supercapacitor and the storage battery, and provided with a first threshold, a second threshold, a third threshold and a fourth threshold which are ascended and correspond to the dump energy of the supercapacitor. Therefore, frequent action, charging and discharging of the storage battery can be effectively avoided; the service life is prolonged; a charge state fluctuation of the supercapacitor is reduced; the whole economy of the hybrid energy storage system is improved; and a working state of the energy storage system is optimized. The hybrid energy storage system is applicable to research, development, design, operation control, electric energy measurement, expense management and the like of a wind power generation system, has the characteristics of simple structure, good stability, environmental protection and reproducibility, and has a high industry-university-research value.

The invention discloses an active optimal control system of a wind and light storage combined power generation system and a method. The active optimal control system comprises a wind and light storage combined power generation system control central station and wind and light storage combined power generation system control substations. The method includes drawing out a power output curve of a wind power station, a photovoltaic power station and an energy storage power station according a planed power output curve and by considering correlated conditions of the wind power station, the photovoltaic power station and the energy storage power station, and distributing correlated plans to all control substations; and working out generation plans of corresponding control units according to power output plans distributed by all control substations, and executing power output plans distributed by control substations finally by the control units. By the aid of the control process, the wind and light storage combined power generation system can be guaranteed to operate according to the force output curve, charge-and-discharge times of storage batteries can be reduced, low current charge-and-discharge of the energy storage power station is avoided, the short-time overload capability of the energy storage power station is fully utilized, and the service life of the energy storage power station is prolonged.

The invention discloses a fast-locked delay chain phase-locked loop, which includes a voltage-controlled delay chain, an acceleration lock control module, a phase detector, a charge pump, and a loop filter; wherein, the voltage-controlled delay chain is connected to a clock input terminal The acceleration lock control module is connected to the voltage-controlled delay chain; the phase detector is connected to the output end of the voltage-controlled delay chain and the output end of the acceleration lock control module; the charge pump is connected to the phase detector The output terminal of the device and the output terminal of the acceleration locking control module; the loop filter is connected with the output terminal of the charge pump and the input terminal of the voltage-controlled delay chain. The delay chain phase-locked loop provided by the invention can make the system enter the locked state quickly, stably and accurately.

A portable power source system including a battery pack housing at least one secondary battery, wherein first and second internal terminals for connecting to a pair of external terminals are provided inside the battery pack, and two or more operations in different operating directions are required to connect the external terminals to the internal terminals. The battery pack includes external terminal inserting portions for inserting the external terminals, and the two or more operations include a first operation including inserting the external terminals into the external terminal inserting portions and a second operation in a direction different from that of the first operation. In a state before the first operation is performed, at least one of the internal terminals is shielded with a protective cover, and the protective cover recedes from a position for shielding the internal terminal, in conjunction with the first operation, the second operation or a combination of the first operation and the second operation, thereby enabling a connection of the external terminals to the internal terminals.

A lighting control device of a lighting device for a vehicle includes a switching regulator for supplying a driving current to a semiconductor light source. The lighting control device also includes control means having a current detecting portion for detecting the driving current and serving to control dimming of the semiconductor light source in order to reduce a mean current of the driving current by repeating driving and stopping operations of the switching regulator at a high speed upon receipt of a dimming control signal. The current detecting portion has a current holding portion for holding the driving current, detected for a driving period of the switching regulator, for a stopping period after a passage of the driving period.

The invention discloses a hybrid power system energy management method based on a fuzzy logic algorithm. The vehicle power need and the power distribution combination are automatically calculated in real time, and the fuel economy of the vehicle is improved on the premise of guaranteeing the dynamic property and meeting different user needs. The technical scheme comprises the following steps: performing system self-check; sending an access signal to an energy source controller and a drive motor controller by a vehicle control unit, and obtaining signal data; judging whether the signal data is complete; calculating the vehicle need power and the vehicle power system accessory power by the vehicle control unit according to the signal data, and calculating each energy source output power in real time through a fuzzy logic algorithm; adjusting and correcting the energy source output power calculated in real time by the fuzzy logic algorithm to obtain a power distribution combination; sending the output power distribution result to each energy source controller through a CAN bus based on the power distribution combination by the vehicle control unit to finish real-time adjustment of each energy source output power of a power system by the vehicle control unit.