95 results about "Boost controller" patented technology

A novel integrated rectifier and boost converter circuit architecture is disclosed. The rectifier architecture includes a plurality of identical half-bridge rectifiers connected to receiving antennas to convert wireless AC power into DC power. The integrated rectifier may be coupled in series with a charging inductor in a boost converter. The inductor may discharge upon operation of two micro-controller-driven switching transistors using predetermined threshold and timing scheme to turn on / off. The rectifier architecture may provide high power densities, improve efficiency at larger load currents, and may be enabled in an integrated circuit with eight RF signal inputs, eight half-bridge rectifiers, and eight DC outputs ganged together as single feed into the boost converter. The rectifier circuit topology may include a comparator driven by the boost controller with a proprietary algorithm which suits control for a maximum power point tracking functionality, and an external micro-controller for additional control of the boost converter.

Reliability enhanced systems are shown where an short-lived electrolytic capacitor can be replaced by a much smaller, perhaps film type, longer-lived capacitor to be implemented in circuits for power factor correction, solar power conversion, or otherwise to achieve DC voltage smoothing with circuitry that has solar photovoltaic source (1) a DC photovoltaic input (2) internal to a device (3) and uses an enhanced DC-DC power converter (4) to provide a smoothed DC output (6) with capacitor substitution circuitry (14) that may include interim signal circuitry (28) that creates a large voltage variation for a replaced capacitor (16). Switchmode designs may include first and second switch elements (17) and (18) and an alternative path controller (21) that operates a boost controller (22) and a buck controller (23) perhaps with a switch duty cycle controller (32).

A ballast circuit for a high intensity discharge lamp includes a boost converter, responsive to a dc input voltage, for providing a boosted dc output voltage; a boost controller, responsive to the boosted dc output voltage, for driving the boost converter to maintain the boosted output voltage at a predetermined level; a buck converter, responsive to the boosted dc output voltage, for providing a reduced dc output voltage; and a buck controller, responsive to the reduced output voltage, for driving the buck converter to operate the discharge lamp in a transition mode and maintaining the reduced dc output voltage at a preselected level for operating the discharge lamp in a steady state mode.

A charge pump circuit boosts a voltage of a battery so as to generate a drive voltage for an LED. A constant current circuit generates a constant current to feed through the LED. A monitoring circuit monitors a cathode potential of the LED, i.e., a voltage across the constant current circuit. A control circuit receives a result of monitoring from the monitoring circuit 110 and increases a step-up ratio of the charge pump circuit when the voltage across the constant current circuit drops below a minimum voltage that guarantees a constant current. The control circuit sets an externally requested constant current value in the constant current circuit. When a change from a large current to a small current is requested, the control circuit returns the step-up ratio of the charge pump circuit to 1.0.

A Power Management Circuit for a portable electronic device comprising an internal battery to be charged either through a first interface or through an AC_DC conversion circuit. The circuit comprises a first buck / boost converter having a Switched Mode Power Supply (SMPS) mode which can be controlled either in a buck or a boost mode, said first buck / boost controller being associated with a first external coil for the purpose of embodying a battery charging circuit through a first interface (USB). The circuit further comprises a second buck / boost converter which can also be controlled either in a buck or a boost mode. Bypass circuits are used for performing, under control of a control circuit, the bypass of either the voltage of the battery or the voltage generated by said buck / boost controllers when in boost mode to a second interface (SIM / MMC).

A power management system comprises a power conversion stage and a controller. The power conversion stage has two terminals. The first terminal is coupled to a first power source which provides a first voltage. The second terminal is selectively coupled to a second power source which provides a second voltage. The controller coupled to the power conversion stage can select a mode from at least a first mode and a second mode. In the first mode, the power conversion stage receives the first voltage at the first terminal and generates a step-up voltage at the second terminal. The generated step-up voltage is greater than the first voltage. In the second mode, the power conversion stage receives the second voltage at the second terminal and generates a step-down voltage at the first terminal for charging the first power source. The generated step-down voltage is less than the second voltage.

The invention discloses a test circuit for automatically testing the avalanche voltage of avalanche photodiodes and a method. The test circuit comprises a boost power chip with a current detector and a boost controller for providing bias voltage and current for an avalanche photodiode; a microcontroller with three internal analogue converters for adjusting and sampling the bias voltage and current; four resistance capacitance networks for connecting the internal circuits between the microcontroller and the boost power chip. The three analogue converters of the microcontroller are respectively connected with the feedback input of the boost controller, the bias voltage input of the current detector and the monitor output of the current detector via three resistance capacitance networks. The invention is based on automatic control theory, can automatically adjust safe bias voltage, can judge the avalanche breakdown region by comparing the sampled current value and a preset respected value, and can display the result on a man-machine interface of a microcomputer system, having wide dynamic range, accurate and adjustable output, fast and accurate measurement.

This invention provides an AC-to-DC power converter that improves the overall conversion efficiency especially that at the minimum input ac voltage for universal input operation design by adopting a new combination of control strategies and topologies for the PFC pre-regulator and DC-to-DC converter. The PFC pre-regulator was arranged to provide a regulated bus voltage of which the amplitude is varied in accordance with input ac voltage by a follower boost controller to achieve best efficiency in minimum input ac voltage operation. A synchronous rectifier dual boost PFC pre-regulator was present for further reduction of the power loss in the converter. Symmetrical half-bridge or symmetrical full bridge switch devices were arranged for the primary side of DC-to-DC converter and synchronous rectification circuit with two synchronous rectifier were arranged for the secondary side of the DC-to-DC converter as combination of the AC-to-DC converter. The two synchronous rectifiers were controlled to turn on and turn off complementary to that to the primary half-bridge switch devices to insure a minimized power loss of that converter stage for the extended bus voltage operation design.

The invention discloses a bidirectional direct current converter based on an immittance network, and a digital control system and a digital control method of the bidirectional direct current converter. The bidirectional direct current converter based on the immittance network comprises a storage battery, a low-voltage-side filter capacitor, a first active full-bridge circuit, the immittance network, a high-frequency transformer, a second active full-bridge circuit and a high-voltage-bus-side filter capacitor. The digital control system comprises a first voltage sensor, a second voltage sensor, a current sensor and a digital signal processing (DSP) digital controller, wherein the DSP digital controller comprises a BUCK controller, a BOOST controller, a signal conditioner, a first selective switch and a second selective switch. According to the basic characteristics of the immittance network, the two active full-bridge circuits in the bidirectional direct current converter can operate with high power factor, and the current stress of a switching tube can be greatly reduced. By the adoption of the system and the method, according to the characteristics of the immittance network, the zero-current turn on and zero-current turn off of all switching devices of a high-voltage-side active full-bridge circuit are realized, and the efficiency of the converter is improved.

A voltage generator includes a boosting circuit boosting a power voltage to generate first through fourth voltages, and a boosting controller controlling the boosting circuit. The boosting controller sets the third and fourth voltages to a voltage level lower than that of a ground voltage while the first and second voltages are generated, so that a plurality of voltages may be stably generated, i.e., without latch-up.

An electric power steering device for a vehicle includes an estimation mechanism estimating if there is a possibility that a backward electric current flows in a booster circuit toward a vehicle battery device, and a boosting controller stopping the boosting operation of the booster circuit to prevent a backward electric current from flowing in the booster circuit when it is estimated that there is a possibility that a backward electric current flows by the estimation mechanism. The estimation mechanism estimates that there is a possibility that a backward electric current flows in the booster circuit when the steering condition of a steering wheel is a returning condition or a steering-held condition. Otherwise, the estimation mechanism estimates if a backward electric current flows on the basis of input and output voltages of the booster circuit and information on the switching of a first boosting switching element. Thereby, overheat of the booster circuit can be prevented.

The invention discloses a Boost controller and a Boost converter, and belongs to the technical field of power supplies. The Boost controller comprises a first pulse signal generating unit, a first comparison unit, a selecting unit, a soft start unit, a second pulse signal generating unit, a second comparison unit, a triggering unit and a buffering unit. The Boost controller dynamically adjusts the modulation type of a loop according to the load changing situation, and the Boost controller is automatically switched between a pulse width modulation mode and a pulse frequency modulation mode. The Boost converter comprises the Boost controller, a first transistor, a rectifier diode, a first capacitor, a voltage division sampling circuit and an output driving circuit accomplishing the amplitude amplification from low-voltage signals to high-voltage output signals. According to the Boost controller and the Boost converter, the corresponding speed requirement of loop output is met, and meanwhile the power consumption level of the overall converter is reduced to the largest extent.

A power management system comprises a power conversion stage and a controller. The power conversion stage has two terminals. The first terminal is coupled to a first power source which provides a first voltage. The second terminal is selectively coupled to a second power source which provides a second voltage. The controller coupled to the power conversion stage can select a mode from at least a first mode and a second mode. In the first mode, the power conversion stage receives the first voltage at the first terminal and generates a step-up voltage at the second terminal. The generated step-up voltage is greater than the first voltage. In the second mode, the power conversion stage receives the second voltage at the second terminal and generates a step-down voltage at the first terminal for charging the first power source. The generated step-down voltage is less than the second voltage.

A charge pump circuit boosts a voltage of a battery so as to generate a drive voltage for an LED. A constant current circuit generates a constant current to feed through the LED. A monitoring circuit monitors a cathode potential of the LED, i.e., a voltage across the constant current circuit. A control circuit receives a result of monitoring from the monitoring circuit 110 and increases a step-up ratio of the charge pump circuit when the voltage across the constant current circuit drops below a minimum voltage that guarantees a constant current. The control circuit sets an externally requested constant current value in the constant current circuit. When a change from a large current to a small current is requested, the control circuit returns the step-up ratio of the charge pump circuit to 1.0.

The invention provides a vacuum brake boosting control system and a vacuum brake boosting control method for electric cars. The vacuum brake boosting control system comprises a brake device, a vacuumizing device and a vacuum brake boosting controller connected with the vacuumizing device. The brake device comprises a brake pedal, a booster cylinder assembly, a brake oilway and an oil storage tank which are sequentially connected. The vacuumizing device comprises a vacuum pump and a vacuum gas storage tank which are connected, and the vacuum gas storage tank is connected with the booster cylinder assembly and provided with a pressure sensor which is connected with the vacuum brake boosting controller so as to transmit gas pressure value measured in the vacuum gas storage tank to the vacuum brake boosting controller. When the measured gas pressure value is lower than the lower limit set gas pressure value, the vacuum brake boosting controller transmits vacuumizing control commands and drives a vacuumizing pump to vacuumize the vacuum gas storage tank.

The invention discloses a method for controlling a virtual synchronous generator of a two-stage photovoltaic inverter. The method is characterized in that the procedure of logic judgment on the working area of a photovoltaic power curve is given, so as to solve the problems of power fluctuation and voltage stabilizing at the direct current side under two running modes of the virtual synchronous generator, such as grid connecting and grid disconnecting; the stability of the working area of a photovoltaic battery is represented by judging the positive and negative of the change rate dPdc_boost / dUdc_boost of input power along with the direct current voltage, and a pre-boost controller and a post-inverter power outer loop controller are switched, so as to effectively solve the problem of direct current voltage collapse during overload running; a combined feedback control method of post-inverter output frequency and power grid frequency is adopted, so that the sag coefficient is controlledby the power angle, and the virtual damping is independently adjusted; an inductance current and capacitance current weighting control method is used for balancing the output voltage dynamic responseof the photovoltaic inverter and the island parallel current equalizing characteristics, so as to realize the uniform control under two running modes of the two-stage photovoltaic inverter, such as grid connecting and grid disconnecting, thereby improving the whole property.

A boosted engine is provided, which includes an engine body formed with a combustion chamber, a spark plug, a fuel injection valve, a booster, a boost controller, and a control unit including an operating range determining module and a compression end temperature estimating module. In a high load range, the fuel injection valve and the spark plug are controlled so that a mixture gas inside the combustion chamber starts combustion through flame propagation by ignition of the spark plug, and unburned mixture gas then combusts by compression ignition, and the boost controller is controlled to bring the booster into a boosting state. When a gas temperature inside the combustion chamber exceeds a given temperature at CTDC, the fuel injection valve is controlled so that a fuel injection end timing occurs on a compression stroke, and the spark plug is controlled so that the mixture gas is ignited after CTDC.

The invention provides an electric automobile vacuum pump control method and device, a controller and an automobile. The method is applied to a vacuum boost controller VBP in communication connectionwith a control module of an electric automobile. The method includes: acquiring a preset signal of the control module; when detecting that the preset signal accords with a preset fault condition, determining a control module associated fault condition of the vacuum pump; determining a corresponding fault level of the fault condition according to a preset corresponding relation between fault conditions and fault levels; executing a preset fault handling operation corresponding to the fault level.

The invention provides an electromagnetic valve driving device capable of carrying out online regulation, which comprises an MCU (Micro Controller Unit), a first D / A (Digital-Analog) conversion circuit, a second D / A conversion circuit, a third D / A conversion circuit, a first amplifying circuit, a first comparator, a second comparator, a third comparator, a CPLD (Complex Programmable Logic Device) logic control circuit, a boost controller enabling circuit, a boost controller, a booster circuit, a high voltage driving circuit, a low voltage driving circuit, a cylinder selection driving circuit, a high voltage driving pipe, a low voltage driving pipe, a cylinder selection pipe and a sampling resistance R. Parameters of the first D / A conversion circuit, the second D / A conversion circuit and the third D / A conversion circuit and logic in the CPLD are subjected to online setting by the MCU. According to the invention, online adjustability of a driving high voltage and a driving current of an electromagnetic valve can be implemented. The electromagnetic valve driving device is used for driving the electromagnetic valve in an electric control common rail oil sprayer of a diesel engine.

The application discloses a switch power supply circuit and a control method thereof. The switch power supply circuit includes an input port which receives the input signal; an energy storage port which provides the energy storage voltage; an inductor which is provided with a first terminal and a second terminal, wherein the first terminal is coupled to the input port; a power level circuit which is coupled between the second terminal of the inductor and the energy storage port; an energy storage capacitor which is coupled between the energy storage port and the reference ground; a boost controller which receives the feedforward signal which represents the input signal, and outputs the boost control signal to maintain the boost working mode of the power level circuit when the input signal is bigger than a boost threshold; and a buck controller receives the feedforward signal which represents the input signal, and outputs the buck control signal to maintain the buck working mode of the power level circuit when the input signal is smaller than a buck threshold, and the energy storage voltage is bigger than the input signal. The switch power supply circuit and the control method thereof reduce the circuit consumption and improve the system efficiency.

The invention discloses an intelligent fire robot with an unmanned aerial vehicle. The intelligent fire robot comprises a vehicle body, walking tracks arranged on two sides of the vehicle body, a water tank arranged on the vehicle body, a first wireless transceiver and a fire water monitor, and further comprises the unmanned aerial vehicle, a remote controller, a chassis, a landing plate, a first water pipe, a second water pipe, a pump, a water pumping controller, a booster pump, a boost controller, a first hose joint, a second hose joint, a spraying pipe and a fire hose; the chassis is arranged above the water tank for accommodating the unmanned aerial vehicle; the unmanned aerial vehicle includes a machine body, a landing frame, a fixed joint, camera, a second wireless transceiver and a flight controller; a water inlet for communicating with the water tank is formed in the bottom of the chassis; the landing plate is arranged in the chassis, and is provided with a landing tank and a pipe outlet groove; two electric box doors are arranged at the upper end of the chassis; an electric door controller respectively connected with the two electric box doors is arranged in the chassis; and a positioner is arranged on the landing plate.

The invention relates to the electric control technical field of cranes, in particular to a hybrid power tyre crane energy-saving system which comprises an electric generator and a rectifying device connected with the electric generator, wherein the rectifying device converts an alternating- current power into a direct-current power and supplies the direct-current power to a frequency transformer through a direct-current bus. An energy exchange device is arranged on the direct-current bus and comprises a programmable controller, a boost controller arranged on the direct-current bus, a charge / discharge controller connected to the direct-current bus between the boost controller and the frequency transformer, and a storage battery system connected to the charge / discharge controller, wherein the programmable controller exchanges data with the boost controller, the charge / discharge controller and the storage battery system through fieldbuses, and the storage battery system comprises a storage battery, a state sensor, a protective circuit, a cooling and ventilation device and a storage battery manager. The hybrid power tyre crane energy-saving system has favorable energy-saving effect, reduces pollution to the atmosphere, lowers the noise of an electric generator and supplies stable direct-current bus voltage to a RTG system.

The present embodiments relate generally to power controllers, and more particularly to synthetic current hysteretic control of a buck-boost DC-DC controller. In one or more embodiments, a controller includes PFM-PWM and Buck-Boost transitions with minimal circuitry and power consumption. In these and other embodiments, the controller includes a low-Iq synthetic ripple generator for use in implementing hysteretic control of a buck-boost controller.

The invention discloses an electric auxiliary brake system of an electric automobile, through which sufficient power can be provided to the electric automobile, the brake performance of the electric automobile is improved, the safety performance of the electric automobile is improved and the defects in the prior art are overcome. The electric auxiliary brake system of the electric automobile comprises a brake main cylinder, a brake pedal, a vacuum booster, a vacuum pump and a vacuum boosting controller, wherein the vacuum booster is respectively connected with the brake pedal and the brake main cylinder; a vacuum tank is arranged between the vacuum booster and the vacuum pump; the vacuum booster is connected with the vacuum tank through a vacuum pipeline; the vacuum tank is connected with the vacuum pump through a vacuum pipeline; a vacuum check valve is arranged on the vacuum pipeline which connects the vacuum booster with the vacuum tank; a vacuum pressure detection device is arranged on the vacuum tank; and the vacuum pressure detection device and the vacuum pump are respectively connected with the vacuum boosting controller.

There is provided a switching mode power supply having multiple outputs, including: a DC / DC converter converting a DC voltage level according to a change in a load and including a primary coil and a secondary coil; a boost unit boosting an output voltage of the DC / DC converter in a first mode and outputting the boosted output voltage to an output terminal; a bypass unit bypassing the output voltage of the DC / DC converter in a second mode, to output the bypassed voltage to the output terminal; and a boosting controller controlling the boost unit according to a voltage detected at a center tab of the secondary coil of the DC / DC converter.

The invention provides a winch and method for raising and lowering a boat anchor attached to an anchor rope, comprising: an electric motor (10) operable to turn the winch in a rope raising direction or a rope lowering direction and powered from a power source supplying a supply voltage; and a boost controller (CB1-3,S1-2,K1-6,Kx1-4,25,30) for applying a boosted voltage higher than the supply voltage to the motor (10) so as to increase a turning speed of the motor when the motor is operating in the rope lowering direction.

An electric power steering device for a vehicle includes an estimation mechanism estimating if there is a possibility that a backward electric current flows in a booster circuit toward a vehicle battery device, and a boosting controller stopping the boosting operation of the booster circuit to prevent a backward electric current from flowing in the booster circuit when it is estimated that there is a possibility that a backward electric current flows by the estimation mechanism. The estimation mechanism estimates that there is a possibility that a backward electric current flows in the booster circuit when the steering condition of a steering wheel is a returning condition or a steering-held condition. Otherwise, the estimation mechanism estimates if a backward electric current flows on the basis of input and output voltages of the booster circuit and information on the switching of a first boosting switching element. Thereby, overheat of the booster circuit can be prevented.