12results about How to "Wide input voltage range" patented technology

The invention relates to the technical field of control circuits, and discloses a gallium nitride power supply drive control circuit which comprises an input rectification filter circuit, a PWM control circuit, a gallium nitride switch tube drive circuit, a feedback control circuit and an output rectification filter circuit. Wherein the output end of the input rectification filter circuit is connected with the input end of the PWM control circuit, the output end of the PWM control circuit is connected with the input end of the gallium nitride switch tube driving circuit, and the output end of the gallium nitride switch tube driving circuit is connected with the input end of the output rectification filter circuit. The output end of the output rectification filter circuit is connected with the input end of the feedback control circuit, and the output end of the feedback control circuit is connected with the input end of the PWM control circuit. By integrating the efficient gallium nitride transistor and accurate PWM control, high-efficiency and high-stability power supply conversion is realized.

The invention relates to the technical field of power electronic control, in particular to a light load control method, device, equipment and medium for an optical storage preceding-stage LLC resonant converter, and the method comprises the steps: carrying out the difference between an output voltage and a voltage reference value of a frequency loop, and inputting the difference into a PI controller of the frequency loop; the sawtooth carrier wave and the modulation wave are intersected to generate a driving signal of a primary side switch tube, the driving signal is compared with an output limiting amplitude, and whether a frequency loop is in a saturated state is judged; the difference between the output voltage and the voltage reference value of the intermittent ring is input into a PI controller of the intermittent ring to generate an output value; comparing the output value with a preset threshold value, and judging whether the intermittent ring is in a saturated state or not; according to whether the frequency loop and the intermittent loop are in the saturation state or not, the operation condition of the LLC resonant converter is judged, the input voltage range of the LLC resonant converter is widened by setting the intermittent control loop and adopting intermittent control under the light load condition, and the problem that the voltage gain of traditional frequency conversion control is too high under the light load condition is effectively solved.

The invention discloses a four-switch Buck-Boost converter circuit for photovoltaic maximum power point tracking. The four-switch Buck-Boost converter circuit comprises a main circuit module, an input voltage detection module, an output voltage detection module, an output current detection module, a control output module and a driving amplification circuit module. The control output module comprises a micro-control unit, and the micro-control unit is provided with an ADC sampling interface and a PWM output interface. The main circuit module processes the input voltage of the photovoltaic panel and outputs direct current to charge the battery; the input voltage detection module, the output voltage detection module and the output current detection module are used for sampling the input voltage, the output voltage and the output current of the main circuit module and transmitting sampling values to the micro-control unit; the micro-control unit judges the mode of the main circuit module according to a sampling value, a PWM signal is output by the PWM output interface through an improved maximum power point tracking algorithm, and the on and off of a switching tube of the main circuit module are controlled through the driving amplification circuit module.

The present invention provides a power supply circuit, an ultrasonic radar and a vehicle. The power supply circuit includes a protection diode, whose input end is connected to a voltage source; a filter detection circuit, one end of which is connected between the voltage source and the protection diode and the other end is grounded, and the filter detection circuit is configured to filter the voltage of the voltage source and detect the voltage amplitude of the voltage source; a voltage stabilizing circuit, which is connected between the output end of the protection diode and the voltage output port of the power supply circuit and is configured to output a stable voltage; and a filter circuit, one end of which is connected between the voltage output port and the voltage stabilizing circuit and the other end is grounded, and is configured to filter the voltage output by the voltage stabilizing circuit. The power supply circuit of the present invention can achieve stable voltage output through the synergistic effect of the protection diode, the filter detection circuit, the voltage stabilizing circuit and the filter circuit, and is suitable for a wider input voltage range.

The invention relates to a boost power supply circuit suitable for a space radiation environment and a working method thereof. The circuit comprises a driving square wave signal generation unit, a driving signal amplification unit, a boost unit and a voltage stabilization protection unit. The boost power supply circuit is composed of discrete device structures based on an amplifier (or a comparator), a diode, a triode, a power switch tube and a resistor-capacitor, and the boost power supply circuit is simple in structure, wide in input bus voltage range, high in loading capacity and high in reliability. And when the input bus voltage is lower than the minimum power supply voltage required by components such as a chip in the circuit, enough power supply voltage can be provided for the components. According to the range condition of the input bus in actual use, the voltage stabilization protection unit in the circuit can not be reserved when appropriate, and the circuit is further simplified.

The application provides a voltage generating circuit and electronic equipment, comprising a bias current module, a response control module, a driving module, a threshold reduction module and an output voltage setting and sampling module, and has simple structure. The preset bias current input by the bias current module can control the transistor to work in a sub-threshold region, so that the circuit has low power consumption. The output voltage setting and sampling module can set the value of the target output voltage, improving the application flexibility of the circuit. The response control module can adjust the output current size generated by the driving module according to the sampling result output by the output voltage setting and sampling module, achieving the purpose of loop control of the current, which not only can ensure that the output voltage stability of the voltage generating circuit is high, but also can improve the dynamic response speed of the circuit. The threshold reduction module can control the driving module to work to provide the output current under the condition that the power supply voltage is lower, so that the voltage generating circuit has a wider input voltage range.

The present invention discloses a marine three-phase power UPS, wherein a cabinet door connected to the cabinet by a hinge is arranged in front of the cabinet, a cable gland for accessing a three-phase cable is arranged on the left side of the cabinet, a first panel and a second panel from bottom to top are arranged on the front side of the cabinet, and a three-phase power output terminal is connected to an input switch, the input switch is first connected to a bypass switch, and then respectively connected to an AC-DC charger and a main power contactor, the AC-DC charger is respectively connected to a battery pack and a battery circuit breaker, the battery circuit breaker is connected to a DC-AC inverter, the DC-AC inverter is connected to a transformer, the transformer is connected to an inverter output contactor, the main power contactor and the inverter output contactor are respectively connected to an output switch, and the bypass switch and the output switch are respectively connected to the output terminal. The present invention utilizes a three-phase backup power supply system and PWM control technology to provide a three-phase zero-free power supply to an oil supply pump, so that it can normally supply oil to a standby generator set and continue to work for more than half an hour.

The present invention discloses a flyback switching power supply with a wide input voltage, including a voltage input interface, a rectifier filter circuit, a high-frequency transformer, a first secondary rectifier filter circuit, a voltage output interface, a sampling circuit, an isolation circuit, a PWM control circuit, a switch circuit, a second secondary rectifier filter circuit, an auxiliary voltage output interface and a wide voltage startup circuit. The present invention increases the input voltage range of the flyback switching power supply and improves its stability by setting a more complex wide voltage startup circuit, overcomes the technical problem of a narrow input voltage range caused by only one or several resistors in series in the prior art, and enables the flyback switching power supply to be applicable to more electronic devices.

The present invention discloses a staggered parallel high-gain DC-AC inverter for photovoltaic hydrogen production, comprising a first transformer, a second transformer, a staggered parallel circuit, a dual three-port asymmetric boost circuit and an inverter circuit, wherein the primary coil L1 of the first transformer and the primary coil L3 of the second transformer are connected in parallel, and the secondary coil L2 of the first transformer and the secondary coil L4 of the second transformer are connected in series; the staggered parallel circuit is used to convert the photovoltaic power source V in The dual three-port asymmetric boost circuit is used to boost the voltage output by the secondary coils of the first transformer and the second transformer, and output asymmetric bipolar direct current; the inverter circuit is used to convert the direct current output by the dual three-port asymmetric boost circuit into alternating current, and then output it to the hydrogen production grid V g The present invention has high conversion efficiency and small voltage fluctuation.

A single-phase symmetrical bridge arm double-path hybrid two-level rectifier comprises an alternating current power supply vin, uncontrolled diode rectifier bridge arms D1-D4, diodes D5-D12, an inductor L, an inductor L1, an inductor L2, a switch tube Sa, a switch tube S1, a switch tube S2, a capacitor C and a resistor R. And the diodes D7 and D8 and the switching tubes S1 and S2 form a symmetrical bridge arm structure unit. The hybrid rectifier can be flexibly expanded according to requirements, parallel assemblies are added to improve power output, meanwhile, the quota and loss of devices are reduced, and efficiency and power density are improved. Compared with a traditional two-level converter, the single-phase symmetrical bridge arm double-path mixed two-level rectifier has the advantages that the number of power switch devices is small, no dead zone is controlled, the harmonic content is low, and the power ratio of the two parallel rectifiers can be flexibly adjusted.

The present invention discloses a comparator circuit and a chip containing the same. The comparator circuit includes: an amplifier circuit and a comparison circuit; the amplifier circuit includes a first input pair of tubes, a second input pair of tubes, a third input pair of tubes, a fourth input pair of tubes, a first amplifier sub-circuit and a second amplifier sub-circuit; the first input pair of tubes, the second input pair of tubes, the third input pair of tubes and the fourth input pair of tubes all include a PMOS tube and an NMOS tube whose gates are connected to each other; the gates of the NMOS tubes in the first input pair of tubes and the fourth input pair of tubes are connected to a first input voltage, the gates of the NMOS tubes in the second input pair of tubes and the third input pair of tubes are connected to a second input voltage, the first amplifier sub-circuit outputs a first amplifier voltage; the second amplifier sub-circuit outputs a second amplifier voltage; and the comparison circuit outputs a comparison result. The present invention ensures that the input voltage value can be turned on by setting the input pair of tubes, thereby increasing the input voltage range of the comparator circuit.

The application relates to a charging and driving integrated controller of an electric vehicle, which comprises a driving module and a charging module. The driving module is an improved three-phase asymmetric half-bridge circuit, two common-source connected switch tubes are used to replace an A-phase lower tube and a B-phase upper tube, a B-phase motor winding is connected with a manual switch in series, and then connected with the series connection points of switch tubes and diodes in an upper tube bridge arm and a lower tube bridge arm of the B-phase asymmetric half-bridge circuit. The charging module comprises a first capacitor and a rectifier bridge. The two ends of the first capacitor are connected with the series connection points of switch tubes and diodes in a lower tube bridge arm of an A-phase asymmetric half-bridge circuit and the series connection points of switch tubes and diodes in an upper tube bridge arm of a B-phase asymmetric half-bridge circuit respectively. Two output ends of the rectifier bridge are connected with the series connection points of the B-phase motor winding and the manual switch and the positive pole of a storage battery respectively, and the input end of the rectifier bridge is connected with commercial power. The application can realize the functions of motor driving and storage battery charging, does not need to additionally add a charger, can realize step-up and step-down charging, and the externally connected parts are all passive devices, so that the application has excellent stability and reliability.