Abstract: A bearing structure for a high-low-voltage conversion circuit is disclosed and includes an insulation carrier, a first conductor layer, a second conductor layer, a first trench and a first insulation material. The first conductor layer and the second conductor layer are coated on the first surface and the second surface of the insulation carrier, respectively. A voltage difference is formed between the first conductor layer and the second conductor layer. The first trench is disposed on the first surface and surrounds an outer peripheral edge of the first conductor layer. The first conductor layer is extended from the first surface into the first trench, and the outer peripheral edge of the first conductor layer is located at a bottom of the first trench. The first insulation material covers the outer peripheral edge of the first conductor layer and is filled in the first trench.

Abstract: An insulation resistance detection circuit is coupled to a positive end and a negative end of a DC power source, and is used to detect a positive insulation resistance between the positive end and a ground point and detect a negative insulation resistance between the negative end and the ground point. A detection unit sets a first estimated resistance and a second estimated resistance, and acquires a first voltage based on turning on the switch and acquires a second voltage based on turning off the switch. The detection unit calculates a third voltage and a fourth voltage according to the first estimated resistance and the second estimated resistance so as to detect the positive insulation resistance and the negative insulation resistance when the third voltage is equal to the first voltage and the fourth voltage is equal to the second voltage.

Abstract: An auxiliary power circuit of a conversion module is used to supply power to a control unit, and an input end of the conversion module includes an even number of energy storage units coupled in series. The auxiliary power circuit includes an even number of primary-side circuits and a secondary-side circuit. Each primary-side circuit includes a first switch unit, a second switch unit, and a resonance tank. The first switch unit is connected to the second switch unit in series, and is correspondingly connected to one of the energy storage units in parallel. The resonance tank is connected to the second switch unit in parallel. The secondary-side circuit is coupled to the resonance tanks of two of the primary-side circuits to acquire power and supply power to the control unit.

Abstract: An insulation resistance detection circuit is coupled to a positive end and a negative end of a DC power source, and is used to detect a positive insulation resistance between the positive end and a ground point and detect a negative insulation resistance between the negative end and the ground point. A detection unit sets a first estimated resistance and a second estimated resistance, and acquires a first voltage based on turning on the switch and acquires a second voltage based on turning off the switch. The detection unit calculates a third voltage and a fourth voltage according to the first estimated resistance and the second estimated resistance so as to detect the positive insulation resistance and the negative insulation resistance when the third voltage is equal to the first voltage and the fourth voltage is equal to the second voltage.

Abstract: A mobile charging station is applied to a combination truck including a tractor and a trailer. The mobile charging station includes a solid-state transformer power module and a plurality of charging pipes. The solid-state transformer power module is disposed on the trailer, and receives an input power source. The solid-state transformer power module includes a plurality of AC-to-DC conversion modules, and the plurality of AC-to-DC conversion modules convert the input power source into a plurality of DC power sources. The plurality of charging piles is disposed on the trailer, and the plurality of charging piles are coupled to the plurality of DC power sources so that the charging piles provide charging power corresponding to the number of electric vehicles connected to charge the electric vehicles when the electric vehicles connect to the charging piles.

Abstract: A power conversion system applied to a solid state transformer includes a DC link, a plurality of capacitors, and a plurality of power conversion module assemblies. The plurality of capacitors is coupled in series between a positive bus and a negative bus of the DC link. Each of the power conversion module assemblies has a plurality of DC conversion modules. In any of the power conversion module assemblies, input sides of the DC conversion modules are connected in series to form two input ends of the power conversion module assembly, and output sides of the DC conversion modules are connected in parallel to form two output ends of the power conversion module assembly. Each of the plurality of power conversion module assemblies is correspondingly connected to each of the plurality of capacitors.

Abstract: A power apparatus applied in a solid state transformer structure includes an AC-to-DC conversion unit, a first DC bus, and a plurality of bi-directional DC conversion units. First sides of the bi-directional DC conversion units are coupled to the first DC bus. Second sides of the bi-directional DC conversion units are configured to form at least one second DC bus, and the number of the at least one second DC bus is a bus number. The bi-directional DC conversion units receive a bus voltage of the first DC bus and convert the bus voltage into at least one DC voltage, or the bi-directional DC conversion units receive at least one external DC voltage and convert the at least one external DC voltage into the bus voltage.

Abstract: A rack device having a cabinet and power modules stacked in the cabinet is provided. The power module has a frame, an insulative plate, an insulative cover and transformers. The insulative plate is arranged in the frame. The insulative cover is arranged in the frame and disposed spacedly from and parallel with the insulative plate. Each transformer arranged in the frame has a high-voltage set and a low-voltage set electrically connected with each other. The low-voltage sets are arranged on one surface of the insulative plate and do not protrude from the frame, and the high-voltage sets are arranged on another surface of the insulative plate and between the insulative plate and the insulative cover. The frame of each power module is connected with the frame of adjacent power module, and the frame of at least one of the power modules is connected to the cabinet.

Abstract: A bearing structure for a high-low-voltage conversion circuit is disclosed and includes an insulation carrier, a first conductor layer, a second conductor layer, a first trench and a first insulation material. The first conductor layer and the second conductor layer are coated on the first surface and the second surface of the insulation carrier, respectively. A voltage difference is formed between the first conductor layer and the second conductor layer. The first trench is disposed on the first surface and surrounds an outer peripheral edge of the first conductor layer. The first conductor layer is extended from the first surface into the first trench, and the outer peripheral edge of the first conductor layer is located at a bottom of the first trench. The first insulation material covers the outer peripheral edge of the first conductor layer and is filled in the first trench.

Abstract: A power apparatus applied in a solid state transformer structure includes an AC-to-DC conversion unit, a first DC bus, and a plurality of bi-directional DC conversion units. First sides of the bi-directional DC conversion units are coupled to the first DC bus. Second sides of the bi-directional DC conversion units are configured to form at least one second DC bus, and the number of the at least one second DC bus is a bus number. The bi-directional DC conversion units receive a bus voltage of the first DC bus and convert the bus voltage into at least one DC voltage, or the bi-directional DC conversion units receive at least one external DC voltage and convert the at least one external DC voltage into the bus voltage.

Abstract: A connector for a system circuit board or a power module is provided. The connector includes a main body and an optical connection mechanism. The main body includes a first connecting terminal and a second connecting terminal. The first connecting terminal and the second connecting terminal are power contacts or signal contacts. The optical fiber connection mechanism is embedded within the main body. The optical fiber connection mechanism is disposed between the first connecting terminal and the second connecting terminal. Since the optical fiber connection mechanism is embedded within the main body, it is not necessary to specifically remove the optical fiber cable when the power module is detached from the cabinet. Moreover, the appearance of the product is more aesthetically-pleasing, and the maintaining speed and the product reliability are increased.

Abstract: An insulation resistance detection circuit is coupled to a positive end and a negative end of a DC power source, and is used to detect a positive insulation resistance between the positive end and a ground point and detect a negative insulation resistance between the negative end and the ground point. A detection unit sets a first estimated resistance and a second estimated resistance, and acquires a first voltage based on turning on the switch and acquires a second voltage based on turning off the switch. The detection unit calculates a third voltage and a fourth voltage according to the first estimated resistance and the second estimated resistance so as to detect the positive insulation resistance and the negative insulation resistance when the third voltage is equal to the first voltage and the fourth voltage is equal to the second voltage.

Abstract: A detection apparatus for unbalanced DC link capacitor voltage, the DC link provides a DC voltage and includes a plurality of capacitors coupled in series to two ends of the DC link and a plurality of balanced resistors coupled in series to two ends of the DC link and corresponding to the capacitors. The detection apparatus includes a plurality of sense resistors and a current sensor. One end of each sense resistor is coupled to a common-connected node of two capacitors, and the other end thereof is coupled to a common-connected node of two balanced resistors. The current sensor is coupled to one of the sense resistors and measures a current value of a current flowing through the sense resistor coupled to the current sensor.

Abstract: An auxiliary power circuit of a conversion module is used to supply power to a control unit, and an input end of the conversion module includes an even number of energy storage units coupled in series. The auxiliary power circuit includes an even number of primary-side circuits and a secondary-side circuit. Each primary-side circuit includes a first switch unit, a second switch unit, and a resonance tank. The first switch unit is connected to the second switch unit in series, and is correspondingly connected to one of the energy storage units in parallel. The resonance tank is connected to the second switch unit in parallel. The secondary-side circuit is coupled to the resonance tanks of two of the primary-side circuits to acquire power and supply power to the control unit.

Abstract: A pre-charge control circuit includes a control unit, a conversion unit, and a pre-charge switch. The control unit provides a control signal according to a PWM signal, and the conversion unit provides a control voltage according to the control signal. The pre-charge switch adjusts a magnitude of the current flowing through the input path of the electronic circuit according to the control voltage.

Abstract: A connector for a system circuit board or a power module is provided. The connector includes a main body and an optical connection mechanism. The main body includes a first connecting terminal and a second connecting terminal. The first connecting terminal and the second connecting terminal are power contacts or signal contacts. The optical fiber connection mechanism is embedded within the main body. The optical fiber connection mechanism is disposed between the first connecting terminal and the second connecting terminal. Since the optical fiber connection mechanism is embedded within the main body, it is not necessary to specifically remove the optical fiber cable when the power module is detached from the cabinet. Moreover, the appearance of the product is more aesthetically-pleasing, and the maintaining speed and the product reliability are increased.

Abstract: A power apparatus applied in a solid state transformer structure includes an AC-to-DC conversion unit, a first DC bus, and a plurality of bi-directional DC conversion units. First sides of the bi-directional DC conversion units are coupled to the first DC bus. Second sides of the bi-directional DC conversion units are configured to form at least one second DC bus, and the number of the at least one second DC bus is a bus number. The bi-directional DC conversion units receive a bus voltage of the first DC bus and convert the bus voltage into at least one DC voltage, or the bi-directional DC conversion units receive at least one external DC voltage and convert the at least one external DC voltage into the bus voltage.

Abstract: A power apparatus applied in a solid state transformer structure includes an AC-to-DC conversion unit, a first DC bus, and a plurality of bi-directional DC conversion units. First sides of the bi-directional DC conversion units are coupled to the first DC bus. Second sides of the bi-directional DC conversion units are configured to form at least one second DC bus, and the number of the at least one second DC bus is a bus number. The bi-directional DC conversion units receive a bus voltage of the first DC bus and convert the bus voltage into at least one DC voltage, or the bi-directional DC conversion units receive at least one external DC voltage and convert the at least one external DC voltage into the bus voltage.