Abstract: A power converter is provided. The power converter includes first to fourth switches electrically connected in series, a flying capacitor and a controller. Positive and negative terminals of the flying capacitor are electrically connected to the second and third switches respectively. The controller operates the first and fourth switches to perform a first complementary switching with a first dead time, and operates the second and third switches to perform a second complementary switching with a second dead time. The controller determines to regulate the first or second dead time by detecting a capacitor voltage of the flying capacitor, such that the capacitor voltage of the flying capacitor is maintained within a balance voltage range.

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 circulating current suppression method of a power system having a plurality of power modules is provided. Each power module includes a high-voltage bus, a low-voltage bus and a balance circuit having a neutral voltage. The circulating current suppression method includes: in each balance circuit, disposing a first capacitor electrically coupled between the high-voltage bus and the neutral voltage, and disposing a second capacitor electrically coupled between the neutral voltage and the low-voltage bus; acquiring a current effective value of an input of each power module; if detecting that the current effective value of at least one power module doesn't remain at a current reference value, determining that a circulating current occurs in the at least one power module; and operating the balance circuit of the at least one power module to charge the first capacitor or the second capacitor to regulate the neutral voltage for suppressing the circulating current.

Abstract: A power converter is provided. The power converter includes first to fourth switches electrically connected in series, a flying capacitor and a controller. Positive and negative terminals of the flying capacitor are electrically connected to the second and third switches respectively. The controller operates the first and fourth switches to perform a first complementary switching with a first dead time, and operates the second and third switches to perform a second complementary switching with a second dead time. The controller determines to regulate the first or second dead time by detecting a capacitor voltage of the flying capacitor, such that the capacitor voltage of the flying capacitor is maintained within a balance voltage range.

Abstract: A method for information display, a processing device, and a display system are disclosed. The display system includes a light transmissive display screen, at least one first information extraction device, at least one second information extraction device, and a processing device. The processing device is connected to a display screen, the first information extraction device, and the second information extraction device. The first information extraction device extracts position information of a user. The second information extraction device extracts position information of a target object. The processing device constructs a fixed reference coordinate system, locates initial positions of the user, the target object, and the display screen, accordingly displays a fused image on the display screen, and updates the fused image displayed on the display screen according to at least one of a movement amount of the display screen and a movement amount of the user.

Abstract: A method for information display, a processing device, and a display system are disclosed. The display system includes a light transmissive display screen, at least one first information extraction device, at least one second information extraction device, and a processing device. The processing device is connected to a display screen, the first information extraction device, and the second information extraction device. The first information extraction device extracts position information of a user. The second information extraction device extracts position information of a target object. The processing device constructs a fixed reference coordinate system, locates initial positions of the user, the target object, and the display screen, accordingly displays a fused image on the display screen, and updates the fused image displayed on the display screen according to at least one of a movement amount of the display screen and a movement amount of the user.