46results about How to "Increase current output capability" patented technology

The invention discloses a combined-type SVPWM (Space Vector Pulse Width Modulation) method. Different SVPWM methods are adopted according to different stator frequencies of an AC motor; when the stator frequency of the AC motor is lower than the low-frequency sector, a half-frequency method is adopted; when the stator frequency of the AC motor is in the medium-and-low frequency sector, a flat-top SVPWM method is adopted; when the stator frequency of the AC motor is in the medium-and-high frequency sector, a seven-segment SVPWM method is adopted; and when the stator frequency of the AC motor is in the high-frequency sector, an FFC (Fundamental Frequency Clocking) SVPWM method. Usually, for power loss of an inverter, the seven-segment SVPWM method is larger than the flat-top SVPWM method, the flat-top SVPWM method is larger than the half-frequency SVPPWM method, and the half-frequency SVPPWM method is larger than the FFC SVPWM method; and for the torque control precision, the four methods are optimal within different frequency ranges. According to the invention, the four SVPWM method are used together, different SVPWM methods are adopted according to different working conditions of the motor so as to play respective potentials; and therefore, lower power loss of the inverter and higher torque control precision are drawn into consideration, and the output power of the motor running in the high-frequency sector is increased.

The invention relates to a bidirectional direct-current motor driving integrated circuit, which comprises a control chip, an H-bridge switching circuit connected with the control chip, a forward input end, an inversion input end, a positive output end, a negative output end, a power supply positive electrode and a power supply negative electrode, wherein the H-bridge switching circuit is connected between the power supply positive electrode and the power supply negative electrode and comprises a first switching chip, a second switching chip, a third switching chip and a fourth switching chip which are connected with one another. Due to an optimized design and an optimized structure, the bidirectional direct-current motor driving integrated circuit has the advantages of small encapsulation volume, high efficiency, high driving current energy, multiple functions and the like; and by the bidirectional direct-current motor driving integrated circuit, the production and use cost of the whole circuit can be reduced.

The invention discloses a chained hybrid energy storage system with an LC tuned filter and a control method thereof. The chained hybrid energy storage system comprises a chained hybrid energy storage structure formed by a capacitor power unit, a super capacitor energy storage unit and a storage battery energy storage unit, and the LC tuned filter which is connected with the chained hybrid energy storage structure so as to form an auxiliary power loop circuit. The chained hybrid energy storage system controls each unit by outputting a PWM (pulse width modulation) modulating wave, wherein the modulating wave is composed of two portions which are respectively a power frequency modulating wave and a high frequency modulating wave. The power frequency modulating wave controls power frequency alternating voltage and current output of the energy storage system. The high frequency modulating wave controls power to transfer among all the units through the auxiliary power loop circuit, wherein the super capacitor energy storage unit charges the capacitor power unit through the auxiliary power loop circuit so as to keep terminal voltage of the capacitor power unit stable, when current output of the storage battery energy storage unit is insufficient, the super capacitor energy storage unit provides the power for the storage battery energy storage unit through the auxiliary power loop circuit, and when residual energy of a super capacitor is insufficient, a storage battery charges the super capacitor through the auxiliary power loop circuit.

The invention discloses a power output control circuit which is arranged between the output end of a power circuit and a load. The power output control circuit is characterized in that the power output control circuit is composed of a switch tube and a detection control circuit set with the preset voltage value, the switch tube is connected between the output end of the power circuit and the load in series, the detection control circuit detects the output voltage of the power circuit, when the output voltage is lower than the preset voltage value, the switch tube is controlled to be turned off, and when the output voltage exceeds the preset voltage value, the switch tube is controlled to be turned on. The power output control circuit has the technical advantages that the supply voltage establishing time taken to supply power to the load through the power circuit can be adjusted, and the starting capability of the self-oscillation power circuit is improved. A back-level power source can be easily and reliably started until a pre-level power source is completely started, and the accurate and reliable starting time sequence of a multi-layer power supply system starting is guaranteed. The invention further discloses the multi-layer power supply system with the power output control circuit.

A BCD semiconductor device and a method for manufacture the same are provided, the BCD semiconductor device includes a first high voltage nLIGBT device, a second high voltage nLIGBT device, a first high voltage nLDMOS device, a second high voltage nLDMOS device, a third high voltage nLDMOS device, a first high voltage pLDMOS device, a Low Voltage NMOS Devices, a Low Voltage PMOS Devices, a PNP device and a diode device which are integrated on the same chip, wherein the High Voltage nLIGBT Device, the High Voltage nLDMOS Device, the High voltage pLDMOS device are dielectric isolated so as toa achieve complete isolation of high and low voltage devices. A nLIGBT, nLDMOS, Low Voltage NMOS, low voltage PMOS and low voltage NPN are are monolithically integrated on a substrate, The isolation region composed of dielectric, buried layer of second conductivity type, dielectric groove and injection region of first conductivity type realizes high and low voltage all-dielectric isolation on integrated chip, avoiding high and low voltage crosstalk problem. The multi-channel design is adopted in six types of high voltage tubes, which can effectively increase the current output capability of highvoltage tubes.

The invention discloses an asymmetric chain type hybrid energy storage system and a control method thereof. The asymmetric chain type hybrid energy storage system mainly comprises a chain type hybrid energy storage structure and an LC tuned filter, wherein the chain type hybrid energy storage structure is composed of a super-capacitor energy storage unit and a rechargeable battery energy storage unit, and the LC tuned filter is connected with the chain type hybrid energy storage structure to form an assistant power loop. When charging and discharging, the alternating voltage output from the rechargeable battery energy storage unit comprises a high-frequency component through controlling PWM switching signals in a cascade converter of the rechargeable battery energy storage unit, and the power flow size and direction between different units can be changed through regulating the amplitude and phase of the high-frequency voltage component. Through power exchange, when the current output from the rechargeable battery energy storage unit is insufficient, the super-capacitor energy storage unit is capable of providing power for the rechargeable battery energy storage unit through the assistant power loop so as to improve the current output ability thereof; when the surplus energy of the super-capacitor is insufficient, the rechargeable battery charges the super-capacitor through the assistant power loop.

The invention relates to the technical field of lithium batteries, in particular to a lithium battery structure with a leading-out wire. The invention relates to a lead-type anode post lithium battery comprising a battery housing; a lithium sheet, a side film and a carbon package are sequentially sheathed in the battery housing, wherein the port of the batter housing is provided with a cover film; the cover film is provided with a nut cap body which is connected with an anode leading-out structure, and the anode leading-out structure comprises a current collector performing the current collection function, an anode post and the leading-out wire; the current collector, the anode post and the leading-out wire are respectively independent components. The anode leading-out structure of the invention is characterized in that the current collector can choose pure nickel and alloy thereof with favourable electrical conductivity to manufacture and is manufactured into a flat structure, thus increasing the current output capacity of the battery and avoiding bending phenomenon when the current collector is inserted into the carbon package. The anode post adopts 4J28 alloy material to realize better sealing with glass, and the leading-out wire can adopt tinning alloy with strong tinning ability; in addition, the leading-out wire has favourable toughness and is not easy to break off.

The invention discloses an combined interleaved direct current conversion system outputting ripple-free waves, which is used for carrying out charge and discharge test on a power battery, and comprises an H-bridge direct-current converter and a multi-unit interleaved circuit, wherein the H-bridge direct-current converter is used for carrying out direct current conversion on a direct current bus voltage output externally, the multi-unit interleaved circuit comprises one or more two-way interleaved direct-current converters, input ends of the two-way interleaved direct-current converters are electrically connected with an output end of the H-bridge direct-current converter, output ends of the two-way interleaved direct-current converters are electrically connected with the power battery, and a control end of the double-path interleaved direct current converter can receive a phase-shifted PWM pulse waveform signal. According to the combined interleaved direct current conversion system outputting ripple-free waves, the output current ripple is zero, and therefore the size of a filter inductor and the size of a filter capacitor are reduced.

The invention discloses an energy-saving driving method of a plasma display plate and its two types of energy-saving driver. It adjusts the number of the working energy-saving circuit or the corresponding parameter of the same energy-saving circuit so as to make the acoustic resonance on best condition by computing the equivalent condensing value of the light-emitting unit number; it stores the energy of the PDP display plate shunt capacitance in the energy storing capacitance by controlling the time sequence. The energy storing capacitance uses the acoustic resonance to charge the PDP in charging mode.

The invention discloses a mixed gas plasma collector tube which comprises a sealed container, wherein a low-pressure gas material is filled in the sealed container; electrode plates are arranged in the sealed container; the low-pressure gas material is prepared from two or more out of hydrogen, nitrogen, helium, neon, argon, krypton, xenon and the like, and the pressure of the material is 1*10<-5> to 1*10<-1>Pa. According to the mixed gas plasma collector tube, electric energy can be output under the conditions of no mechanical movement, no external power, no noise, no release of heat energy, no visible light, no toxic substance leakage and no release of harmful electromagnetic waves.

The invention discloses a voltage and current signal conversion circuit. The voltage and current signal conversion circuit comprises a resistor R1, a resistor R2, an operational amplifier A1, a resistor Ro1, a resistor R3, a resistor R4, an operational amplifier A2, a resistor R5, a resistor Ro2 and an operational amplifier A3. The operational amplifier A1 and a periphery circuit constitute a same-phase summation operational circuit, and a voltage follower is formed by the operational amplifier A2. The resistance values of the resistor R1, the resistor R2, the resistor R3 and the resistor R4 are equal, and a current flowing through the resistor Ro1 is equal to Ui/Ro1. The current is provided by operational amplifier A1 and a power supply VCC together. The output ability is increased by 40 mA through the resistor R5 and the operational amplifier A3. According to the voltage and current signal conversion circuit, the purpose of improving the current output ability of by two times is achieved.

The invention discloses a pixel circuit and a driving circuit thereof as well as an X-ray detector. The pixel circuit comprises an initialization module, an output module, an output control module, aphotodiode and a photodiode control module. In the technical scheme of the invention, photocurrent generated by the photodiode is used as a control signal under the condition that the output control module is conducted; on the one hand, the output module is controlled to be conducted; on the other hand, current values, outputted by the conducted output control module and the conducted output module, of a first power supply signal end are adjusted, i.e., current which is finally outputted by the pixel circuit is jointly determined by the photocurrent generated by the photodiode and the first power supply signal end rather than direct output of the photocurrent generated by the photodiode, so that the power output capability of the pixel circuit is improved, further the signal-noise-ratio isimproved and the image quality is improved.