Abstract: An integrated magnetic element is provided, including a first magnetic-core frame, three second magnetic-core frames, and three coil windings. The first magnetic-core frame has a first side pillar and a second side pillar opposite to the first side pillar. The three second magnetic-core frames are arranged on the side corresponding to the first side pillar of the first magnetic-core frame, and are arranged in parallel with the axis of the first side pillar of the first magnetic-core frame. Each of the second magnetic-core frames has a first side pillar adjacent to the first side pillar of the first magnetic-core frame, and a second side pillar opposite to the first side pillar of itself. The three coil windings connect to a three-phase grid, and wind around the first side pillar of the first magnetic-core frame and the corresponding first side pillar of the second magnetic-core frame respectively.

Abstract: A method for determining failure of a power element for use in an electronic device is provided. The electronic device includes a power element and a detection circuit. The method includes the steps of: obtaining a temperature-calculation model of the power element, and obtaining a parameterized temperature-calculation model of a power-element parameter and a parameterized temperature of the power element; detecting load information and the power-element parameter by the detection circuit; calculating a modeled temperature of the power element according to the load information and the temperature-calculation model, and calculating the parameterized temperature of the power element according to the power-element parameter and the parameterized temperature-calculation model; determining whether an error between the modeled temperature and the parameterized temperature exceeds a permitted range; and determining that the power element has failed in response to the error exceeding the permitted range.

Abstract: A thermal abnormality detection system includes: a first heat dissipation system having a first temperature sensor for measuring an actual temperature of the first heat dissipation system; a second heat dissipation system having a second temperature sensor for measuring an actual temperature of the second heat dissipation system. Assuming that a difference between the actual temperature of the first heat dissipation system and an upper limit temperature of the first heat dissipation system is d1, and a difference between the actual temperature of the second heat dissipation system and an upper limit temperature of the second heat dissipation system is d2, when a value of d1?d2 is greater than an error threshold value Error1_level, the first heat dissipation system is determined to be abnormal, and when the value of d1?d2 is less than an error threshold value Error2_level, the second heat dissipation system is determined to be abnormal.

Abstract: A bearingless motor is provided. The bearingless motor primarily includes a rotor module and a stator. The rotor module includes a plurality of rotor elements, and the stator includes a housing that forms a receiving space for receiving the rotor module, wherein the rotor module is rotatable relative to the stator.

Abstract: A motor comprises a stator, heatsinks, a rotor and a heat-dissipation device. The stator has a hollow potion, a coil portion and a housing portion having a first surface, a second surface and sidewalls. The hollow portion is penetrated through the housing portion. The coil portion is disposed between the hollow portion and the housing portion. The heatsinks are respectively disposed on different sidewalls. The heat-dissipation device comprises a wind-guiding cover and a first fan. The wind-guiding cover comprises a wind-guiding main board and wind-guiding lateral boards. The wind-guiding main board is disposed adjacent to the second surface. The wind-guiding lateral boards are vertically extended from different lateral edges of the wind-guiding main board towards the same direction. Each wind-guiding lateral board is disposed corresponding to one of the heatsinks, and at least one of the wind-guiding lateral boards has a hole. The first fan is received by the hole.

Abstract: An integrated magnetic element is provided, including a first magnetic-core frame, three second magnetic-core frames, and three coil windings. The first magnetic-core frame has a first side pillar and a second side pillar opposite to the first side pillar. The three second magnetic-core frames are arranged on the side corresponding to the first side pillar of the first magnetic-core frame, and are arranged in parallel with the axis of the first side pillar of the first magnetic-core frame. Each of the second magnetic-core frames has a first side pillar adjacent to the first side pillar of the first magnetic-core frame, and a second side pillar opposite to the first side pillar of itself. The three coil windings connect to a three-phase grid, and wind around the first side pillar of the first magnetic-core frame and the corresponding first side pillar of the second magnetic-core frame respectively.

Abstract: A driving circuit includes a power switch driver and a plurality of current-limiting circuits. The power switch driver is configured to output a driving signal according to a switching signal. Each of the current-limiting circuits has an input terminal electrically coupled to a corresponding one of output terminals of the power switch driver respectively. Output terminals of the current-limiting circuits are electrically coupled to a control terminal of a power switch. The power switch driver is configured to selectively output the driving signal to one of a plurality of output terminals according to a load state of the power switch, such that the driving signal is outputted to the control terminal of the power switch via one of the current-limiting circuits.

Abstract: A driving circuit includes a power switch driver and a plurality of current-limiting circuits. The power switch driver is configured to output a driving signal according to a switching signal. Each of the current-limiting circuits has an input terminal electrically coupled to a corresponding one of output terminals of the power switch driver respectively. Output terminals of the current-limiting circuits are electrically coupled to a control terminal of a power switch. The power switch driver is configured to selectively output the driving signal to one of a plurality of output terminals according to a load state of the power switch, such that the driving signal is outputted to the control terminal of the power switch via one of the current-limiting circuits.