Abstract: An energy storage system and an operating method thereof are provided. The energy storage system provides power regulation for the power grid. The energy storage system includes an energy storage unit, a measurement unit and a control unit. The measurement unit measures the operating frequency of the power grid, and the control unit receives the operating frequency measured by the measurement unit. When the operating frequency is greater than or equal to a first frequency boundary value and less than or equal to a second frequency boundary value, the control unit configures the regulation ratio of the power regulation to be a first operating ratio which is less than or equal to 0 and greater than or equal to the first input boundary value. The first frequency boundary value is less than the first frequency, and/or the second frequency boundary value is greater than the second frequency.

Abstract: A flying capacitor converter, a voltage converter and an energy storage system are provided. The flying capacitor converter includes a high-voltage side, a low-voltage side, a power switch unit, a current switch unit and a current detection unit. The high-voltage side is electrically connected with a first power source. The low-voltage side is electrically connected with a second power source. The power switch unit is electrically connected between the high-voltage side and the low-voltage side and includes three terminals and four power switches. The current switch unit is electrically connected with the high-voltage side, the low-voltage side and/or a common node. The current detection unit is electrically connected between a third terminal of the power switch unit and the common node. If the current detected by the current detection unit indicates that a short-circuit condition occurs, the power switch unit is disconnected from the high-voltage side and/or the low-voltage side.

Abstract: A housing positioning structure includes a housing, an upper supporting structure and a lower supporting structure. The housing includes a top plate and side plates vertically arranged on sides of the top plate. An accommodation space is enclosed by the top plate and the side plates. A horizontal line is formed at the lower edge of the side plate. The direction above and away the horizontal line is defined as an above-body direction, and the direction below and away the horizontal line is defined as a below-body direction. The upper supporting structure is located on the above-body direction side. The lower supporting structure is disposed on the side plates and extends toward the below-body direction side.

Abstract: A modeling device and a modeling method for three-dimension objects are provided. The modeling method includes loading a motion model of a model object, where the motion model indicates a motion level of each of a plurality of model components of the model object; receiving an object to be modeled including a plurality of components; reading a component attribute of each component; adjusting the motion level of each model component based on the component attribute of each component to generate a modeled component including the component attribute; and obtaining a modeled object after setting the motion level of each model component, where the modeled object includes the modeled components respectively corresponding to the model components.

Abstract: A connector is provided. The connector of the present disclosure includes a first barrier and a second barrier. The plurality of first connecting terminals of the socket connecting element are disposed between the first barrier and the bottom of the first main body. The plurality of second connecting terminals of the plug connecting element are disposed between the second barrier and the bottom of the second main body. When the first main body is rotated and moved through the first path so as to drive the first barrier and the second barrier to rotate and move, the second connecting terminal penetrates through the second hole and the first hole so as to contact with the first connecting terminal.

Abstract: A circular current suppression method, a switch control device, and a power conversion system are disclosed, which convert a difference between a voltage converted from a common-mode current of several input currents of a power factor corrector and a bus-voltage difference into a reference current, convert a difference between a reference voltage and a total voltage into a total DC current, and add cosine even-numbered-harmonic components of the reference current based on the total DC current, a target current, and one of several input currents to calculate a compensation current that is converted into a voltage as one of at least one switching command output to the power factor corrector, thereby suppressing the circular current in a configuration of parallel power conversion modules.

Abstract: A power supply is provided. The power supply includes a conversion circuit, an auxiliary power supply circuit, a detection circuit and a control circuit. The conversion circuit generates an output voltage according to an input voltage to power a load. The auxiliary power supply circuit generates an auxiliary voltage according to the input voltage. The control circuit estimates an output power of the power supply. The output power includes a load output power of the conversion circuit and an auxiliary output power of the auxiliary power supply circuit. When at least one of the input voltage, the output power and the environment temperature increases, the control circuit configures the conversion circuit to increase the output voltage correspondingly. When at least one of the input voltage, the output power and the environment temperature decreases, the control circuit configures the conversion circuit to decrease the output voltage correspondingly.

Abstract: This disclosure is directed to a fool-proof structure having a shelf and a plug-in unit. The shelf is defined with a socket and an opening, and a stopping portion and an actuating portion are provided on the socket, and the actuating portion and the stopping portion are respectively communicated to the opening. The plug-in unit has an elastic arm. A stopping wall and an actuating slope of the elastic arm protrude from the plug-in unit. A first pitch is defined from the actuating portion to the stop portion, and a second pitch is defined from the actuating slope to the stopping wall. The first pitch may be configured to be greater than the second pitch, so that the actuating portion may push the actuating slope to deflect the elastic arm before the stopping wall arrives the stop part when the plug-in unit is inserted into the socket.

Abstract: A power tool and a switch device thereof are disclosed. The switch device includes a housing, a slider, a magnetic component, a trigger and a control module. The magnetic component generates a magnetic field. The magnetic component is driven by the slider to move along a power-off path and a power-on path. The trigger is pressed by the slider. The control module includes a magnetic sensor generating a position signal according to a position of the magnetic component in the magnetic field. When the magnetic component is located on the power-off path, the control module is turned off. When the magnetic component is moved from the power-off path to the power-on path, the slider triggers the trigger to activate the control module. When the magnetic component is located on the power-on path, the control module outputs a control signal according to the position signal.

Abstract: The present application provides a cascade converter, including a main control system, a plurality of power modules, and a bypass circuit corresponding to each power module; where the main control system is communicatively connected to each power module, the power modules are electrically connected in turn, and any one of the power modules has at least one communicable power module, the communicable power module is an else power module communicatively connected to the power module, and the number of power modules spaced apart is within a preset value; the power module on which a fault occurs is a faulty power module, the faulty power module sends a fault signal to the main control system; the main control system generates a bypass command according to the fault signal and sends it to the faulty power module and the communicable power module of the faulty power module.

Abstract: A speed-reducer-and-motor all-on-one machine is disclosed and includes a connection shaft, a motor and a speed reducer. The connection shaft includes a first section, a second section and an accommodation space. The first section and the second section are arranged in an axial direction. The accommodation space is in communication between a front end and a rear end of the connection shaft. An elliptical cam is formed on an outer surface of the second section of the connection shaft. An outer diameter of the first section is greater than a major axis length of the elliptical cam. The motor is received within the accommodation space and connected to an inner surface of the first section. The speed reducer is connected to the outer surface of the second section.

Abstract: A hybrid mode control method includes steps of: controlling an LLC resonant converter to operate in a burst mode when the LLC resonant converter is in a light load. Afterward, controlling the LLC resonant converter operating in a PWM mode as a load of the LLC resonant converter increases or an output voltage increases in a charging control, or controlling the LLC resonant converter operating in a PFM mode as the load increases or the input voltage decreases in a discharging control. Afterward, controlling the LLC resonant converter to operate in the PFM mode as the load of the LLC resonant converter further increases or the output voltage further increases in the charging control, or controlling the LLC resonant converter operating in a PSM mode as the load further increases or the input voltage further decreases in the discharging control.

Abstract: A motor control system includes a first STO circuit, a second STO circuit and a pulse control module. The first STO circuit includes a first filter circuit, a first STO switch, a first photocoupler circuit and a second photocoupler circuit. The first and second photocoupler circuits are connected in series. The first STO switch and the first filter circuit are connected with the first photocoupler circuit. The second STO circuit includes a second filter circuit, a second STO switch, a third photocoupler circuit and a fourth photocoupler circuit. The third and fourth photocoupler circuits are connected in series. The second STO switch and the second filter circuit are connected with the third photocoupler circuit. The pulse control module issues a pulse signal to the second and the fourth photocoupler circuits and detects whether the first or the second STO circuit is abnormal.

Abstract: A photovoltaic inverter includes a casing, at least one circuit board located in the casing, a current sensor located on the at least one circuit board, an arc detector located on the at least one circuit board, a self-test coil located on the at least one circuit board, and at least one direct current input terminal located on the casing and connected to the at least one circuit board, wherein the self-test coil is configured to deliver a test signal to be sensed by the arc detector, and the direct current input terminal is configured to deliver a direct current through the arc detector, wherein the current sensor is configured to detect a magnitude of the direct current passing through the direct current input terminal.