Abstract: A fan impeller includes a hub, a shaft, a metal housing, a magnetic ring and a plurality of blades. The outer periphery of the hub has a curved surface. The shaft is disposed in the hub and connected to the hub. The metal housing has an annular shape and is disposed in the hub. The magnetic ring is disposed at the inner side of the metal housing. The blades are disposed around the outer periphery of the hub.

Abstract: A fan includes a hub and a blade assembly. The hub has a central portion and an extension portion. The extension portion is extended outwardly from a peripheral edge of the central portion. The blade assembly includes a plurality of blades. Each blade has a leading edge, each of the leading edges is an end point of each blade that is most close to the central portion. The blades are disposed around the hub. At least a part of the leading edges of the blades are connected to the extension portion, and distances between a center of the central portion and the leading edges of at least two blades are different. Therefore, the factors of fan and the quality of voice could be enhanced, and the multi-frequencies noise could be avoided during operation.

Abstract: A power system with communication function applied to a solid state transformer structure includes a plurality of conversion units, a bus path, a plurality of coupling units, and a control module. The conversion units are coupled to the bus path and the coupling units, and the coupling units are coupled to the control module. Each coupling unit is correspondingly coupled to a control unit of each conversion unit. A first-connected coupling unit of the coupling units is coupled to the control module.

Abstract: The present disclosure provides a liquid cooling manifold. The liquid cooling manifold includes a channel body and a plurality of fluid connectors. The channel body includes a base, a wall portion and a fixing portion. The wall portion is connected between the base and the fixing portion, and a fluid channel is formed among the base, the wall portion and the fixing portion. The fixing portion includes a plurality of fixing openings respectively in fluid communication with the fluid channel. The plurality of fluid connectors are respectively disposed on the fixing portion and fixed to the corresponding one of the plurality of fixing openings and respectively in fluid communication with the fluid channel.

Abstract: An auxiliary circuit for outputting a supplying voltage or a detection signal includes a normally-on device and a signal processing circuit. A drain terminal of the normally-on switching device is coupled to a first terminal, a gate terminal of the normally-on switching device is coupled to a second terminal. An input voltage between the first terminal and the second terminal switches between two different levels. The signal processing circuit is configured to output the supplying voltage or the detection signal according to a voltage at a source terminal of the normally-on switching device.

Abstract: A ventilation system comprises a ventilation fan with a lamp and a ceiling which has an installation opening. The ventilation fan with the lamp is adapted for installing to the ceiling through the installation opening. The ventilation fan comprises a housing, a fan module, and a lamp module. The housing includes a top plate and a side wall which are connected with each other to form a first opening. The first opening is aligned with the installation opening. The fan module is disposed in the housing. The lamp module is disposed out of the installation opening. The lamp module and the housing are located at opposite sides of the installation opening of the ceiling. The lamp module includes a light source, a base, at least one optical component, a switch and a lamp cover. The optical component and the switch are disposed at the different sides of the base.

Abstract: A flying capacitor converter includes an inductor, a first switch and a second switch, a first diode and a second diode, a first capacitor and a second capacitor, a flying capacitor, a third diode and a third capacitor, a fourth diode, and a fifth diode. The inductor is coupled to a first node. The first switch and the second switch are commonly connected to a second node. The first diode and the second diode are commonly connected to a third node. The first capacitor and the second capacitor are commonly connected to a fourth node. The flying capacitor is coupled to the second node and the third node. The third diode and the third capacitor are commonly connected to a fifth node. The fifth diode is coupled to the third node and the fourth node.

Abstract: A method for data hand-shaking based on EtherCAT protocol is disclosed, the method is implemented by an EtherCAT slave device, and includes: receiving a data packet from a previous device; obtaining self-related data from or inserting feedback data to the data packet for generating a processed packet; transmitting the processed packet to a next device; receiving a returned packet from the next device; transmitting the returned packet to the previous device; performing a packet diversion procedure to at least one of the data packet, the processed packet and the returned packet for generating a backup packet, wherein at least part of the content of the backup packet is identical to the content of the data packet, the processed packet or the returned packet; analyzing the backup packet; and, filtering the backup packet for obtaining designated application data with respect to other EtherCAT slave devices.

Abstract: A motor brake module for braking a motor is provided. The motor includes a shell, a shaft portion and a driving portion. The motor brake module includes a brake assembly, a block assembly and an armature assembly. The brake assembly includes a shaft hole, plural teeth and plural openings. The shaft portion passes through the shaft hole, and the shaft portion drives the brake assembly to rotate when the shaft portion is rotated. The armature assembly is connected with the block assembly for driving the block assembly to move between the armature assembly and the brake assembly. When the block assembly is moved toward the brake assembly, a portion of the block assembly is contacted with one of the plural teeth and the other portion of the block assembly passes through one of the plural openings.

Abstract: An over-current protection circuit for limiting a power current flowing through a switch device, which generates the power current according to a control signal of a control node, is provided. The over current control circuit includes a voltage control circuit, a current sense unit, a conversion circuit, and a control switch. The voltage control circuit provides the control signal to a gate terminal of the switch device according to a limit signal. The current sense unit senses the power current flowing through the switch device to generate a sense voltage. The conversion circuit converts the sense voltage into a conversion voltage. The control switch generates the limit signal according to the conversion voltage.

Abstract: A transmission and distribution system with electric shock protection function includes a transmitting terminal and a receiving terminal. The transmitting terminal includes a switch, a current measurer, a signal generator, and a controller. The receiving terminal includes a filter. The switch is coupled to a first DC power and a transmission line. The current measurer is coupled to the transmission line, and measures a current of the transmission line and provides a current signal. The signal generator provides a disturbance signal to the transmission line. The controller receives the current signal and controls the switch. If the controller determines that the current signal contains the disturbance signal, the controller turns off the switch.

Abstract: A device includes a first transistor and a second transistor. The first transistor includes a first gate terminal coupled to the first source terminal, a first source terminal, and a first drain terminal. The second transistor includes a second gate terminal coupled to the first drain terminal, a second source terminal, and a second drain terminal.

Abstract: The present disclosure provides a wavelength conversion device including a first thermal conductive plate, a wavelength conversion layer and a second thermal conductive plate. The wavelength conversion layer is disposed on the first side of the first thermal conductive plate and configured to perform a wavelength conversion. The second thermal conductive plate is disposed on the second side of the first thermal conductive plate. The first thermal conductive plate and the second thermal conductive plate are combined to conduct the heat generated by the wavelength conversion layer during the wavelength conversion. Since the thermal conductivity coefficients of the at least two thermal conductive plates are increased along the heat transferring path, it is advantageous to minimize the thermal resistance of the heat transferring path.

Abstract: A charging load detection circuit includes a charging circuit, a frequency generation unit, and a control unit. The control unit controls the frequency generation unit to generate a pulse voltage with a fixed first frequency and a fixed first amplitude, and the frequency generation unit provides the pulse voltage to an output terminal of the charging circuit. The control unit detects whether a load is coupled to the output terminal by detecting whether the first frequency and the first amplitude are varied, and controls connecting or disconnecting a charging path of the charging circuit according to whether the load is coupled to the output terminal.

Abstract: A power conversion circuit includes a first terminal, a second terminal, a first switching conversion unit, a second switching conversion unit, a flying capacitor and a magnetic element. The first switching conversion unit includes a first switch and a third switch. The second switching conversion unit includes a second switch and a fourth switch. The magnetic element includes two first windings and a second winding. A first one of the two first windings is serially connected between the flying capacitor and the second terminal. A second one of the two first windings is serially connected between the second switch and the second terminal. The second winding is serially connected with the flying capacitor and the first one of the two first windings. A turn ratio between the second winding, the first one of the two first windings and the second one of the two first windings is N:1:1.

Abstract: A method for operating a power factor correction (PFC) circuit of an uninterruptible power supply (UPS) apparatus is provided. The PFC circuit includes two T-type converters, and each of the T-type converters includes four switching tubes. The method includes: converting AC input voltage into a positive bus voltage across a first capacitor and a negative bus voltage across a second capacitor that is connected in series with the first capacitor when the UPS apparatus is operated under a normal supply mode; and controlling conduction states of the switching tubes of the T-type converters to balance the positive bus voltage and the negative bus voltage when the UPS apparatus is operated under a battery supply mode.

Abstract: A controlling method of an encoder includes: detecting a rotation angle of a rotor of a motor coupled to the encoder to generate a first counting trigger signal and a second counting trigger signal so as to perform a turn number counting procedure; determining whether a period that an operating voltage of a driving circuit of the motor is smaller than a threshold voltage exceeds a preset time; and when the period exceeds the preset time, controlling a switching unit of the encoder to allow a battery of the encoder to provide a backup voltage to the encoder such that the encoder enters a low power processing procedure.

Abstract: A driver is configured to provide an output voltage and an output current to a load according to an input voltage. The driver includes a power converter, first and second detecting devices and a controller. The power converter is configured to receive and convert the input voltage to the output voltage and the output current. The first detecting device is configured to detect the input voltage to generate a first signal. The second detecting device is configured to detect the output voltage to generate a second signal, and detect the output current to generate a third signal. The controller is configured to perform a calculation to the second signal and the third signal according to one of lookup tables corresponding to the first signal to generate a power value. An operation method of a driver and a light source system are also disclosed herein.

Abstract: A calibration system for robot tool including a robot arm adopting a first coordinate system, a tool arranged on a flange of the robot arm, and an imaging device adopting a second coordinate system is disclosed, wherein an image sensing area is established by the image device. A calibration method is also disclosed and includes steps of: controlling the robot arm to move for leading a tool working point (TWP) of the tool enters the image sensing area; recording a current gesture of the robot arm as well as a specific coordinate of the TWP currently in the second coordinate system; obtaining a transformation matrix previously established for describing a relationship between the first and the second coordinate systems; and importing the specific coordinate and the current gesture to the transformation matrix for calculating an absolute position of the TWP in the first coordinate system.

Abstract: A heat dissipation apparatus with energy-saving effect is coupled to an operation unit, and the heat dissipation apparatus includes a control unit and a drive circuit. The control unit determines whether the operation unit enters an energy-saving mode according to a first signal provided by the operation unit. The control unit shields a plurality of second signals provided to the drive circuit according to the energy-saving mode. The drive circuit does not drive the heat dissipation unit and the heat dissipation unit enters an inertia deceleration.