11 results about "Boost controller" patented technology

The invention discloses a liquid rocket engine starting device and method. The liquid rocket engine starting device comprises a gas cylinder set, a starting system and a pressurization system. High-pressure gas used for starting the turbine and pressurizing the propellant in the fuel storage tank is stored in the gas cylinder group; the starting system comprises a starting controller and a plurality of starting branches, and the pressure and the flow entering the turbine pump are adjusted by controlling the opening and closing number and the opening and closing time of the starting branches. The pressurization system comprises a pressurization controller and a plurality of pressurization branches, and the pressure and the flow in the gas cavity of the fuel storage tank are adjusted by controlling the opening and closing number and the opening and closing time of the pressurization branches. According to the invention, multiple starting of the liquid rocket engine can be realized, the advantages of low development difficulty and low development cost of gas cylinder starting are exerted, and meanwhile, the gas source utilization rate of traditional gas cylinder starting is optimized.

A Bluetooth sound box comprises a BOOST module, a power amplifier and a charging module for charging a battery BAT, the output voltage of the BOOST module is supplied to the power amplifier, and the power amplifier drives a loudspeaker; the BOOST module comprises a synchronous boost controller U8, a phase inverter U9 is arranged between the power amplifier and the synchronous boost controller, the power amplifier detects audio input in real time, a fifth pin of the power amplifier outputs a power supply voltage regulation signal BOOSTPWM according to the amplitude of signal to be output, and the synchronous boost controller U8 adjusts the output voltage of the power amplifier according to the received voltage regulation signal BOOSTPWM. The eighteenth pin dynamically adjusts the output voltage through the detected feedback voltage; the charging module comprises the Type-C interface waterproof protection circuit, idle pins of the Type-C interface are used as sensors, normal function pins are not occupied, and the original performance of the interface is not affected.

A gate of the power transistor is driven by an input through a large resistor. When the boost pulse is activated, the boost switch closes, connecting the small resistor in parallel with the large resistor, thereby reducing the effective gate resistance during the boost pulse. The boost controller generates zero, one or two boost pulses for each input edge. For a rising edge when the transistor is conducted, when the steady-state current is lower than a threshold value, the enhancement controller does not generate an enhancement pulse; otherwise, an enhanced pulse is generated for each edge. The first oscillation peak is compared to a first range and the enhancement pulse width is adjusted until the peak is within the first range. When the oscillation speed is slower than the propagation delay, two enhanced pulses are generated for each input edge and the delay between the two pulses is adjusted until the second oscillation peak is within a second range.

A boost switching power supply and a boost controller thereof are provided. The boost switching power supply includes a transformer, a pulse width modulation controller, and the boost controller. A voltage at a switch control pin of the boost controller is provided by an auxiliary winding of the transformer, and a voltage at a chip supply pin of the boost controller is both a supply voltage of the boost controller and a supply voltage of the pulse width modulation controller. The boost controller is configured to: the voltage at the chip supply pin of the boost controller starts to increase after the boost switching power supply is powered on; and the voltage at the switch control pin of the boost controller starts to increase after the pulse width modulation controller is started. The boost controller is started when the voltage at the switch control pin of the boost controller is greater than a start voltage of the boost controller and the voltage at the chip supply pin of the boost controller is greater than an under-voltage lockout shutdown threshold of the boost controller.

The application discloses a turbocharger controller detection and calibration device, and relates to the technical field of calibration devices.The turbocharger controller detection and calibration device comprises a support table, a torsion sensor, an angle encoder, a first synchronous wheel, a second synchronous wheel, a synchronous belt and a connecting rod; the support table is provided with a test station for placing a turbocharger controller; the torsion sensor and the angle encoder are both arranged on the support table, and the rotating shafts of the torsion sensor and the angle encoder are arranged in parallel towards the test station; the first synchronous wheel and the second synchronous wheel are coaxially connected to the rotating shafts of the torsion sensor and the angle encoder respectively, and the first synchronous wheel and the second synchronous wheel are connected by the synchronous belt which enables synchronous rotation of the two; the connecting rod is coaxially connected to the first synchronous wheel, and the connecting rod is used for connecting the rocker arm of the turbocharger controller.The technical scheme of the application can solve the problem that the existing turbocharger controller detection and calibration device has large detection error, thereby increasing the product calibration failure amount.

A Bluetooth speaker includes a BOOST boost module, a power amplifier, and a charging module for charging a battery (BAT). The output voltage of the BOOST boost module supplies the power amplifier, which drives the speaker. The BOOST boost module includes a synchronous boost controller U8, and an inverter U9 is provided between the power amplifier and the synchronous boost controller. The power amplifier detects the audio input in real time and outputs a power supply voltage adjustment signal BOOST_PWM at pin 5 according to the desired signal swing. The synchronous boost controller U8 dynamically adjusts the output voltage at pin 18 based on the received voltage adjustment signal BOOST_PWM and the detected feedback voltage. The charging module includes a waterproof protection circuit for a Type-C interface, which uses an unused pin of the Type-C interface as a sensor, without occupying normal function pins or affecting the original performance of the interface.

1. The name of the design product: boost controller. 2. The use of the design product: for boosting low voltage to high voltage in fuel cell vehicle. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

The invention discloses an efficiency calculation method and device for a boost controller, and relates to the technical field of power electronics. The method comprises the following steps: acquiring basic parameters of a boost controller; repeatedly executing the step-up inductive current and the duty ratio based on the current iteration round, and calculating the power loss and the step-up conversion efficiency; based on the basic parameters and the power loss under the current iteration round, the inductive current under the next iteration round is calculated, and the inductive current deviation is determined; when the inductive current deviation does not meet the preset convergence condition, the duty ratio under the next iteration round is calculated, and the inductive current and the duty ratio under the current iteration round are updated to the inductive current and the duty ratio under the next iteration round until the inductive current deviation meets the preset convergence condition, and the target boost conversion efficiency of the boost controller is obtained. According to the embodiment of the invention, the boost conversion efficiency can be evaluated more efficiently and accurately, so that reasonable allocation of design resources is facilitated, and the waste cost of design rework is saved.

Provided is an electronic control device that drives and controls a fuel injection valve, the electronic control device increasing a boost current of a booster circuit only in a scene where boosting energy needs to be increased by short-time boosting, and reducing the boost current of the booster circuit in other scenes. The electronic control device including; a booster circuit; a boost setting controller that holds boost control information of the booster circuit; a boost controller that controls an energizing current of the booster circuit based on a current setting value from the boost setting controller; and a fuel injection circuit that supplies current to a fuel injection valve using voltage generated by the booster circuit, in which the boost setting controller reduces a boost speed of the booster circuit when information on engine temperature is higher than a predetermined value.

A single-stage boost class-D amplifier is disclosed. The boost class-D amplifier includes a pulse width modulator, a boost controller coupled to the pulse width modulator, a driver coupled to the pulse width modulator and the boost controller, a system voltage source, an inductor coupled to the system voltage source, a first switch, a second switch, a third switch, a fourth switch, a first diode coupled between the third switch and a ground terminal, a second diode coupled between the fourth switch and the ground terminal, and a capacitor coupled between the first switch and the fourth switch. The pulse width modulator is configured to receive an input signal and generate a first modulated signal in response thereto. The boost controller is configured to receive the first modulated signal and generate a second modulated signal in response thereto. The driver is configured to receive the first modulated signal and the second modulated signal and generate a control signal in response thereto.

Method for operating an internal combustion engine (2) with an exhaust gas-driven charging device (7), comprising the following steps: - Providing a charge control variable (S) for a variably adjustable charge control variable (74) of the charging device (7) in order to set an efficiency of the charging device (7) with respect to an exhaust gas enthalpy of combustion exhaust gas provided by the internal combustion engine (2); - Determining a value for an exhaust back pressure limit (p 3lim ) based on a predetermined maximum ratio of charge exchange work (E A ) and a complete work (E T ) of the internal combustion engine (2) at a current operating point; - Limiting the turbocharger actuator size (S) depending on the specified exhaust backpressure limit value (p). 3lim ).