Abstract: An energy storage module, a power supply system, and a method of controlling the energy storage module are disclosed. The energy storage module includes a bidirectional DC-to-DC converter and an energy storage unit. A first terminal of the bidirectional DC-to-DC converter is connected to the energy storage unit. The method includes: controlling an operation mode of the energy storage module according to a current-sharing bus signal provided by a power module connected to a second terminal of the bidirectional DC-to-DC converter. The energy storage module is used to compensate fluctuations of an input current of the power module.

Abstract: An energy storage module, a power supply system, and a method of controlling the energy storage module are disclosed. The energy storage module includes a bidirectional DC-to-DC converter and an energy storage unit. A first terminal of the bidirectional DC-to-DC converter is connected to the energy storage unit. The method includes: controlling the energy storage module to operate in a charging mode when a load of a power module connected to a second terminal of the bidirectional DC-to-DC converter is in an idle state, and selecting a full power compensation approach or a reduced power compensation approach to compensate an input current of the power module according to a specific condition.

Abstract: Disclosed are a green laser phase rangefinder and a ranging method, which relate to the field of laser ranging. The rangefinder includes a direct digital synthesizer (DDS), a frequency mixing filter circuit, a microcontroller unit (MCU), a first amplifier circuit, an analog switch, a first laser beam module, a second laser beam module, a second amplifier circuit, an avalanche photodiode, a third amplifier circuit and band pass filter circuit, an analog-to-digital converter (ADC) module, a receiving lens, and a high-voltage circuit. A green laser diode is arranged in the first laser beam module; and a red laser diode is arranged in the second laser beam module. In the present disclosure, the green laser diode and the red laser diode are combined to implement ranging. The present disclosure features low power consumption, low costs, and high measurement accuracy.

Abstract: A power supply system for a data center includes an isolated AC-to-DC power conversion unit, an isolated DC-to-DC power conversion unit, an energy storage unit, a first DC bus and a second DC bus. The input terminal of the power supply system is connected with an AC power source. By the isolated DC-to-DC power conversion unit, a first DC voltage from the first DC bus is converted into a second DC voltage. The second DC voltage is provided to the second DC bus. The main power circuit in the isolated DC-to-DC power conversion unit is an LLC circuit or a boost-SRC circuit. The second DC voltage is between 0.5V and 60V. The energy storage unit is electrically connected with the first DC bus. When the isolated AC-to-DC power conversion unit works normally, the energy storage unit is charged to a floating charge state.

Abstract: A multi-level conversion circuit and a cycle-by-cycle protection method therefor are provided. The cycle-by-cycle protection method includes steps of: (a) determining main switches and synchronous rectification switches; (b) controlling the main switches to operate in a normal mode; (c) detecting a current flowing through the inductor, and determining whether the current exceeds a threshold; (d) when the current exceeds the threshold, defining the main switch in an on state and having shortest turn-on duration as a target main switch, switching the target main switch to a current limiting mode for turning it off; and (e) after switching the target main switch to the current limiting mode, if the current is lower than the threshold, at a moment when a falling edge of control signals in a reference mode for the main switches first appears, switching the target main switch to a state in the reference mode corresponding to the moment.

Abstract: A power factor correction circuit includes an inductor, a first upper switch and a first lower switch. The first lower switch and the first upper switch are respectively served as a main switch and a rectifier switch when an input voltage has a positive amplitude. The first upper switch and the first lower switch are respectively served as the main switch and the rectifier switch when the input voltage has a negative amplitude. In a first state, the power factor correction circuit is operated in a boundary conduction mode according to a current threshold. In a second state, the current threshold is adjusted, so that the boundary conduction mode is switched to a continuous conduction mode. In the boundary conduction mode and the continuous conduction mode, a next switching cycle starts when an inductor current flowing through the inductor reaches the current threshold.

Abstract: A multi-level conversion circuit and a cycle-by-cycle protection method therefor are provided. The cycle-by-cycle protection method includes steps of: (a) determining main switches and synchronous rectification switches; (b) controlling the main switches to operate in a normal mode; (c) detecting a current flowing through the inductor, and determining whether the current exceeds a threshold; (d) when the current exceeds the threshold, defining the main switch in an on state and having longest turn-on duration as a target main switch, switching the target main switch to a current limiting mode; and (e) after the target main switch is switched to the current limiting mode, if the current is lower than the threshold, at a moment when a rising edge of a control signal in a reference mode for the target main switch firstly appears, switching the target main switch to a state in the reference mode corresponding to the moment.

Abstract: An isolated DC-DC converter including n conversion circuit units is provided. In each conversion circuit unit, a first connection node is formed between two switching components of a first primary bridge arm, and a second connection node is formed between two electronic components of a second primary bridge arm. A third connection node is formed between two switching components of a first secondary bridge arm, and a fourth connection node is formed between two switching components of a second secondary bridge arm. A first coupling inductor and A first capacitor are serially coupled between the first and third connection nodes. A second coupling inductor and a second capacitor are serially coupled between the second and fourth connection nodes. In the n conversion circuit units, the primary circuit units are electrically connected in series or in parallel, and the secondary circuit units are electrically connected in parallel or in series correspondingly.

Abstract: A multi-level conversion circuit and a cycle-by-cycle protection method therefor are provided. The cycle-by-cycle protection method includes steps of: (a) determining main switches and synchronous rectification switches; (b) controlling the main switches to operate in a normal mode; (c) detecting a current flowing through the inductor, and determining whether the current exceeds a threshold; (d) when the current exceeds the threshold, defining the main switch in an on state as a target main switch, switching the target main switch to a current limiting mode for turning off the target main switch; and (e) after the target main switch is switched to the current limiting mode, if the current is lower than the threshold, at a moment when a falling edge of control signals in a reference mode for the main switches first appears, switching the target main switch to a state in the reference mode corresponding to the moment.

Abstract: A power device includes a mainboard and a power conversion module. The mainboard includes a first side and a third side opposite each other along a first direction, a second side and a fourth side opposite each other along a second direction, the first direction is perpendicular to the second direction. The power conversion module includes a primary-side circuit board and a secondary-side module. The secondary-side module includes a secondary-side circuit board, and the primary-side circuit board, the mainboard and the secondary-side circuit board being electrically connected, the primary-side circuit board and the secondary-side circuit board are spatially separated. The secondary-side module further includes secondary-side element and a first magnetic core element, wherein the secondary-side element and the first magnetic core element are disposed on the secondary-side circuit board along a third direction perpendicular to the first direction and the second direction.

Abstract: A power supply device includes a main circuit board. The main circuit board includes a first side, a second side, a third side and a fourth side. The first side and the second side are opposed to each other and extended in a first direction. The third side and the fourth side are opposed to each other and extended in a second direction. An input/output module is located adjacent to the fourth side. A capacitor module is located adjacent to the third side. A rectifier module is disposed on the main circuit board. A rectifier module is arranged between the input/output module and the capacitor module and located adjacent to the input/output module. A first inductor module, a resonant module and a power semiconductor device module are disposed on the main circuit board and arranged between the capacitor module and the rectifier module.

Abstract: The present disclosure provides a monitoring method for monitoring a DC bus capacitor, including steps of: in a preset cycle, sampling an input voltage, an input current and an output voltage to obtain an input power; filtering the input power and the output voltage to obtain an AC component of the input power and an AC component of the output voltage; calculating a capacitance according to the DC component of the output voltage, the AC component of the input power and the AC component of the output voltage; obtaining a total weight coefficient corresponding to the capacitance; and outputting a monitoring capacitance of the DC bus capacitor according to the plurality of the capacitance calculated and obtained in a plurality of the preset cycles and the plurality of the total weight coefficients corresponding to the plurality of capacitance.

Abstract: The present disclosure provides a pharmaceutical composition for treating sepsis and use thereof, belonging to the technical field of chemical drugs. The present disclosure provides a three-component pharmaceutical composition including hydroxysafflower yellow A (HSYA), paeoniflorin, and albiflorin. The present disclosure further provides a seven-component pharmaceutical composition including HSYA, paeoniflorin, albiflorin, oxypaeoniflorin, senkyunolide I, salvianic acid A sodium (SAAS), and ferulic acid. In the present disclosure, it is verified at the cell level and the animal level that both two groups of the pharmaceutical compositions have an efficacy of effectively treating sepsis. Meanwhile, drug toxicity experiments show that the two groups of the pharmaceutical compositions both are safe. The pharmaceutical composition is an active ingredient of the Xuebijing Injection, which can be used for the clinical treatment of sepsis.

Abstract: A multi-level power factor correction circuit and a surge protection control method for the multi-level power factor correction circuit are provided. When an input voltage is in the surge condition, the multi-level power factor correction circuit enters a surge protection mode under control of a control unit. In the surge protection mode, two first switches, two second switches, a first polarity switch and a second polarity switch are maintained in the turn-off state. Consequently, the input current of the multi-level power factor correction circuit will not flow through the flying capacitor. Since the voltage on the flying capacitor is very stable and not over-charged, the security of the multi-level power factor correction circuit is enhanced.

Abstract: A power supply device, a power supply control device and a control method thereof are provided. The power supply control device is electrically connected to a power source configured to provide power to a post-stage circuit of the power supply control device, and the power supply control device includes a current limiting module and a control unit. The current limiting module is electrically connected to the power source and the post-stage circuit and includes first and second current limiting units electrically connected in parallel. The first current limiting unit is configured to limit an inrush current generated during startup of the post-stage circuit, and the second current limiting unit is configured to limit an inrush current generated during a fluctuation of the power source. The control unit is electrically connected to the current limiting module and is configured to control the first and second current limiting units.

Abstract: A control method for flying capacitor voltage and multi-level conversion circuit employing same are provided. In the multi-level conversion circuit, all lower switches are connected in series between an inductor and a negative output terminal, and all upper switches are connected in series between the inductor and a positive output terminal. Every flying capacitor is connected between a common connection node of the lower switches and a common connection node of the upper switches. When working in DCM, the control method includes steps of (a) regarding the lower switches and the upper switches as main switches and synchronous rectification switches, and (b) adjusting duty ratios of driving signals of the main switches according to adjustment values corresponding to the flying capacitors connected thereto, and adjusting phase-shift angles between driving signals of any two neighboring main switches according to the acquired adjustment values.

Abstract: The present disclosure provides a ribose-modified cap analog and a use thereof, and belongs to the technical field of chemical and biological engineering. The ribose-modified cap analog has a structure of formula (I). The ribose-modified cap analog described herein can improve the stability of mRNA and/or the translation efficiency of mRNA.

Abstract: A power module and an auxiliary supporting device adapted thereto are provided. The auxiliary supporting device is used to maintain a first circuit board in a vertical state on a second circuit board. The auxiliary supporting device includes a first plate and a second plate. The first plate is parallel to and fixed to the first circuit board. The second plate is extended from the first plate in a direction away from the first circuit board. A bottom edge of the second plate is disposed on a surface of the second circuit board facing the first circuit board. The auxiliary supporting device is universally suitable for different combinations between the first plate and the second plate without the need of customized tool.

Abstract: An isolated DC-DC converter including n conversion circuit units is provided. In each conversion circuit unit, a first connection node is formed between two switching components of a first primary bridge arm, and a second connection node is formed between two electronic components of a second primary bridge arm. A third connection node is formed between two switching components of a first secondary bridge arm, and a fourth connection node is formed between two switching components of a second secondary bridge arm. A first coupling inductor and A first capacitor are serially coupled between the first and third connection nodes. A second coupling inductor and a second capacitor are serially coupled between the second and fourth connection nodes. In the n conversion circuit units, the primary circuit units are electrically connected in series or in parallel, and the secondary circuit units are electrically connected in parallel or in series correspondingly.