33results about How to "Reduce static loss" patented technology

The invention relates to a soft-starting circuit of power supply, belonging to the technical field of power control. The soft-starting circuit is arranged between the power supply and a main body unit. One input end of the main body unit is connected with an output end of the power supply. The soft-starting circuit comprises a switch unit, a current limit unit, an energy storage unit and a controlunit, wherein the switch unit is connected with the current limit unit in parallel, the front end of a parallel branch thereof is connected to another output end of the power supply, and the rear endof the parallel branch is connected to one end of the energy storage unit and another output end of the main body unit; the other end of the energy storage unit is connected to one output end of thepower supply; a first end of the control unit is connected to a control end of the switch unit, and a second end of the control unit is connected to a control end of the main body unit; and the control unit controls the disconnection and the connection of the switch unit so as to control the power supply to supply power to the main body unit. The technical scheme can reduce the energy consumptionand protect the power supply.

The disclosure relates to a BUCK-BOOST type DC converter and a control method thereof; the converter comprises a BUCK-BOOST circuit module, a drive module, an output voltage sampling module, a mode control module and a current detection module; the current detection module is in middle phase connection with the BUCK-BOOST circuit module, used for detecting inductance current in the BUCK-BOOST circuit, and sending current detection signals to the mode control module; the mode control module can form a corresponding PWM mode control signal or a PSM mode control signal according to the current detection signal and an output voltage sample signal; according to the PWM mode control signal or the PSM mode control signal, the drive module drives the BUCK-BOOST circuit to work in a BUCK mode, a BOOST mode or a BUCK-BOOST mode under the PWM mode, or to work in the BUCK-BOOST mode under the PSM mode. The DC converter can output a stable voltage in a full load range, and the switch tube power consumption and circuit static loss can be reduced in a mode switching process, thus improving the conversion efficiency.

The invention discloses a solar controller circuit which comprises a main battery, a standby battery, a circuit switching module, an MCU and a voltage dividing module. The anode of the main battery is connected with the first end of the voltage dividing module, the second end of the voltage dividing module is connected with the input end I1 of the MCU, the first end of the circuit switching module is connected with the anode of the main battery or the anode of the standby battery, the second end of the circuit switching module is connected with the first output end O1 of the MCU, and the cathode of the main battery and the cathode of the standby battery are connected with the second output end O2 of the MCU. When the voltage dividing module detects that the voltage of the main battery is lower than or equivalent to a preset voltage threshold, the MCU transmits a switching control signal to the switching control module, the circuit switching module receives the switching control signal, and the first end, which is connected to the anode of the main battery, of the circuit switching module is connected to the anode of the standby battery. The solar controller circuit is conducive to reducing the static loss and improves the safety level.

The invention provides an undervoltage lock-out circuit having a dynamic filtering function. The undervoltage lock-out circuit comprises a reference circuit, a power supply sampling circuit, a comparator and a filter circuit. A filter circuit in the prior art is replaced by a dynamic filter circuit. The two paths of output signals of the power supply sampling circuit are output to one input end ofthe comparator and one input end of the dynamic filter circuit; the two paths of output signals of the reference circuit are output to the other input end of the comparator and the second input end of the dynamic filter circuit; and the output of the comparator is output to the third input end of the dynamic filter circuit. The filtering time of the dynamic filter circuit is controlled by the three paths of output signals simultaneously, and the filtering time changes with the power supply voltage, that is, the larger the drop amplitude of the power supply voltage is, the smaller the filtering time is, thereby realizing dynamic filtering; and the dynamic filter circuit outputs a feedforward signal to the power supply sampling circuit, and thus the output of the dynamic filter circuit is updated continuously.

The invention discloses a low-voltage transformer area load non-power-cut switching system and a working method thereof, and relates to the technical field of electric power operation, maintenance and power supply. At present, power-off switching is needed during power grid maintenance. The system comprises a main conductive branch, a short-time conductive branch, a commercial power bypass, a control circuit and a current/voltage signal acquisition module. The main conductive branch comprises a second circuit breaker Q2; one end of the second circuit breaker Q2 is connected with the mobile box transformer substation/power van S1, and the other end of the second circuit breaker Q2 is connected with the wire outlet end of the low-voltage distribution box JP1; the short-time conductive branch comprises an electronic solid-state switch D1; the short-time conductive branch is connected in parallel with the second circuit breaker Q2; the commercial power bypass comprises a first circuit breaker Q1; and one end of the first circuit breaker Q1 is connected with the wire outlet end of the low-voltage distribution box JP1, and the other end of the first circuit breaker Q1 is connected with the wire inlet end of the low-voltage distribution box JP1. According to the technical scheme, the solid-state electronic solid-state switch D1 bears the transient process, the short-time power failure phenomenon caused by breaking of a mechanical contact is avoided, and therefore non-power-cut switching of the load between the power grid and the standby power supply is achieved.

The invention discloses a PN junction gate-controlled gallium oxide field effect transistor and a preparation method thereof, and mainly solves the problems of effective p-type doping of a gallium oxide material and bipolar structure loss of a gallium oxide-based device at present. The transistor comprises an insulating substrate and an n-type beta-Ga2O3 thin film layer from bottom to top, a source electrode and a drain electrode are arranged at the two ends of the n-type beta-Ga2O3 thin film layer, a gate electrode is arranged in the middle area, and Al2O3 protection layers are arranged on the n-type beta-Ga2O3 thin film layer between the gate electrode and the source electrode and between the gate electrode and the drain electrode and on the inner surfaces of the source electrode and thedrain electrode. A p-type NiO thin film layer is arranged between the n-type beta-Ga2O3 thin film layer and the gate electrode, and the p-type NiO thin film layer and the n-type beta-Ga2O3 thin filmform a p-n junction. According to the invention, the on-resistance and the gate leakage current of the device are reduced, the voltage endurance capability of the device is improved, the static loss of the device is reduced, and the method can be used for preparing a normally-off high-voltage-withstanding gallium oxide device.

The invention discloses an audio voltage following circuit, an audio product and a voltage following method. The audio voltage following circuit comprises an audio digital processing module, a boosting module and a power amplification module, and the audio digital processing module is used for calculating an audio peak value according to an input audio data signal and generating a voltage control signal and an audio signal according to the audio peak value; the boosting module is connected with the audio digital processing module; the boosting module is used for generating a following voltage signal according to the voltage control signal; the power amplification module is connected with the audio digital processing module and the boosting module; and the power amplification module is used for amplifying the power of the audio signal according to the following voltage signal. According to the technical scheme provided by the invention, the hardware cost is reduced, the audio voltage changes along with the audio data signal, the static loss is reduced, and the power supply efficiency of the power amplifier is improved.

The invention discloses a battery power supply circuit and a power source with the same. The battery power supply circuit comprises a delay module used to delay the transmission of an input voltage to an input control chip, an input control module used to transmit the input voltage to a voltage control module when a post-stage circuit is in a non-dormant mode, an input filter module used to filter the input voltage transmitted by the input control module to the voltage control module, the voltage control module used to boost the input voltage and output the boosted input voltage to the post-stage circuit through an output filter module when the input voltage transmitted by the input control module is lower than the voltage required by the post-stage circuit, and the output filter module used to filter an output voltage signal output by the voltage control module to the post-stage circuit. By adopting the battery power supply circuit and the power source of the invention, the static loss and standby loss of a booster circuit are reduced, the service time of batteries is prolonged, and the utilization rate of batteries is increased.

The invention relates to a shield gate trench type field effect transistor and a preparation method thereof. The transistor comprises a substrate region, a drift region, a shield gate, a control gate, a matrix region, a source region, an insulating layer, a source electrode, a drain electrode and a metal gate electrode, the drift region, the base region, the source region and the source electrode are sequentially arranged above the substrate region, the drain electrode is arranged below the substrate region, and the control gate and the shield gate are arranged on one side of the drift region from top to bottom; the substrate region, the drift region and the source region are all N-type doped; the doping concentration of the substrate region and the doping concentration of the source region are both larger than the doping concentration of the drift region. The substrate region, the shield gate and the control gate are all P-type doped; the doping concentration of the shield grid is the same as that of the drift region; and the doping concentration of the control grid is greater than that of the shielding grid. According to the scheme provided by the invention, a peak electric field introduced by an electric field concentration effect caused by a relatively small curvature radius at a corner of the shielding grid can be effectively improved, and an effect of improving a breakdown voltage is achieved, so that the specific on-resistance of the device is reduced.

The invention discloses a zero-interruption hybrid dual power supply automatic conversion device and a use method thereof. The device comprises a conversion device body. An excitation conversion switch and a main control controller are arranged in the conversion device body. The main control controller is provided with an ADC sampling module and an IGBT drive output module. The input end of the excitation conversion switch is connected with a main power supply circuit L1 and a backup power supply circuit L2. The input end of the excitation conversion switch is connected with a load circuit through a bus. An inverter grid-connected power supply unit is arranged next to the excitation conversion switch. The input and output ends of the inverter grid-connected power supply unit are connectedwith the main power supply circuit L1 and the load circuit respectively. The control end of the excitation conversion switch is connected with the signal output end of the main control controller. Thedevice provided by the invention overcomes a traditional conversion switch's problem that the load has a short power failure when a circuit is switched, and has the advantages of lower static loss, higher withstand voltage level and insulation level, and better power supply continuity and stability.

The invention discloses a wireless charging system for an electronic device, aiming to solve the problem of finding an implementation scheme of a wireless charging system with a simple structure. Thesystem comprises an energy transmitting end and an energy receiving end, wherein the energy transmitting end comprises a first integral filtering module, an inverter circuit, a conversion circuit anda transmission resonant network which are connected with each other in order; the energy receiving end comprises a receiving resonant network matched with the transmitting resonant network and a second integral filtering module which are connected with each other in order; the energy transmitting end and the energy receiving end are connected with the receiving resonant network by the transmittingresonant network. The invention realizes the electric energy transmission between the energy transmitting end and the energy receiving end by the setting of the first integral filtering module, the inverter circuit, the converting circuit, the transmitting resonant network, the receiving resonant network matched with the transmitting resonant network and the second integral filtering module, andsimplifies the structure of the wireless charging system at the same time.

Disclosed is an insulated gate bipolar transistor comprising at least the following layers: a source layer of a first conductivity type; a base layer of a second conductivity type wherein the source layer and the base layer electrically contact the source electrode; a drift layer of the first conductivity type; and a collector layer of the second conductivity type disposed between the drift layer and the collector electrode and electrically contacting the collector electrode. The insulated gate bipolar transistor further comprises at least two trench gate electrodes and at least one trench Schottky electrode, and a collection region of the second conductivity type is arranged at the bottom of these electrodes. The collection regions are in the drift layer and laterally separated from each other by the drift layer. The Schottky layer forms a Schottky contact to the collection region at the contact region.

The invention discloses a pulse width modulation two-output circuit and belongs to the field of circuit technology. The pulse width modulation two-output circuit comprises an insulated gate bipolar transistor U1, a UVW three-side power end filtering capacitor circuit (1), a power end filtering circuit (2), a fault signal output circuit (3), a UVW three-phase output current detection circuit (4), aUVW output terminal power supply clamping protection circuit (5), a UVW terminal output protection absorption circuit (6), a singlechip U5 and a peripheral circuit thereof, wherein the UVW three-sidepower end filtering capacitor circuit (1), the power end filtering circuit (2), the fault signal output circuit (3), the UVW three-phase output current detection circuit (4), the UVW output terminalpower supply clamping protection circuit (5), the UVW terminal output protection absorption circuit (6), the singlechip U5 and the peripheral circuit thereof are respectively connected with the insulated gate bipolar transistor U1 by virtue of a corresponding pin. The circuit disclosed by the invention has the advantage that number of applied circuit elements is greatly reduced.