A power supplying system and a power module are provided. The power supplying system includes a power supplying apparatus configured to supply power to a display apparatus, and process an image signal received from outside and transmit the processed image signal to the display apparatus, and a power module configured to supply power to an external apparatus, wherein the power module is configured to be docked with the power supplying apparatus.

A power detection and transmission circuit is provided. The power detection and transmission circuit includes a first conversion circuit, a second conversion circuit and a signal coupling circuit. The first conversion circuit is electrically connected to a power supply module to receive an analog input signal, and is arranged for converting the analog input signal to a first pulse width modulation (PWM) signal. The second conversion circuit is arranged for converting a second PWM signal to an analog regenerated signal, and transmitting the analog regenerated signal to a microcontroller, wherein the microcontroller calculates power information of the power supply module according to the analog regenerated signal. The signal coupling circuit is coupled between the first conversion circuit and the second conversion circuit, and is arranged for coupling the first PWM signal to the second conversion circuit and accordingly generating the second PWM signal.

A quiescent power supply including an AC/DC converter, a switch, an energy storage device, and a controller is disclosed. The switch is electrically coupled to the AC/DC converter to electrically disconnect the AC/DC converter from an AC supply line. The controller is operably coupled to the switch to actuate the switch. In particular, the controller can actuate the switch to disconnect the switch during when the AC/DC converter is idle.

A quiescent power supply including an AC/DC converter, a switch, an energy storage device, and a controller is disclosed. The switch is electrically coupled to the AC/DC converter to electrically disconnect the AC/DC converter from an AC supply line. The controller is operably coupled to the switch to actuate the switch. In particular, the controller can actuate the switch to disconnect the switch during when the AC/DC converter is idle.

An electrical energy transmission system has a three-phase electric current power source generating a three-phase electric current signal including three currents having different phases, a three-phase electric current signal converting device which converts the generated three-phase electric current signal by providing a coincidence of the phases of the currents, a single-wire electrical energy transmission line which transmits the converted electric current signal from the electric current power source to a load, and a device for adjusting electrical parameters of the electric signal at a side of the three-phase electric current power source and/or at a side of the load, when the electric current power source and/or the load have variable power parameters, to provide thereby a stable operation of the electrical energy transmission system.

The invention relates to a device (100) for charging an electric energy store (B) from a three-phase AC voltage source (W1, W2, W3), having, in each phase of the AC voltage source (W1, W2, W3):—a step-down converter (TS1 . . . TS3) with a switch (STS1 . . . STS3);—a diode (FLD) connected in parallel to the step-down converter (TS1 . . . TS3); and—a converter (U) which is connected to the step-down converter (TS1 . . . TS3) and which comprises at least one first half bridge (H1) with two serially connected switches (S1, S2), an inductor (L4) being connected between a connection point of the two switches (S1, S2) of the first half bridge (H1) and the step-down converter (TS1 . . . TS3);—wherein a current direction across the inductor (L4) is set by means of a rectifier (D11 . . . D33) in the step-down converter (TS1 . . . TS3); and—the switches (STS1 . . . STS3) of the step-down converter (TS1 . . . TS3) and at least one second switch (S2) of the first half bridge (H1) of the converter (U) can be switched by means of a controller (10) dependent on the voltages of the AC voltage source (W1, W2, W3) and a current flowing through the inductor (L4) such that a current drawn from the AC voltage source (W1, W2, W3) in order to charge the electric energy store (B) can be generated in such a manner that a substantially sinusoidal current is drawn from each phase of the AC voltage source (W1, W2, W3), the current and the corresponding voltage of the AC voltage source (W1, W2, W3) being substantially in phase in each said phase.

An electrical power converter includes: AC voltage terminals U, V, and W; DC voltage terminals P and N; a converter cell series unit composed of one or more converter cells connected in series between the AC voltage terminals U, V, and W and the DC voltage terminals P and N, each converter cell including a semiconductor element and a capacitor; and a first inductance connected in series to the converter cell series unit, between, of the DC voltage terminals P and N, a DC voltage terminal at the lowest potential with respect to the ground, and the AC voltage terminals U, V, and W.

The present application provides a conversion system and a control method, including N power converters and N controllers, and N controllers one-to-one corresponds to the N power converters. In addition to receiving a first side current and a second side voltage of a corresponding power converter, each of the N controllers can also receive a neighboring direct current voltage signal which only reflects second side voltages of other M power converters in the conversion system, and perform voltage control on the corresponding power converter according to the received signal. The present application adopts fully distributed control, and does not need to set up a centralized controller. When parts of controllers fail, the other controllers can continue to work, so the reliability is higher.

The present application provides a conversion system and a control method, including N power converters and N controllers, where each power converter includes a first side and a second side, the first sides of the N power converters are electrically coupled in series, and currents flowing through the first sides of the N power converters are the same, the N controllers correspond to the N power converters one to one. Each controller contains a common-mode voltage loop and a current loop. The common-mode voltage loop is configured to receive a voltage reference signal and a voltage feedback signal, and output a given signal. The current loop is configured to receive the given signal, a current reference signal, and a first side current of a corresponding power converter, and output a common-mode control signal to modulate a first side voltage of the corresponding power converter.

A power supplying apparatus includes a voltage outputting module and a voltage selecting module. The voltage selecting module is electrically connected to the voltage outputting module. The voltage selecting module includes a returning unit. The voltage selecting module receives a voltage identification signal when the voltage outputting module is electrically connected to an electronic device. When the voltage identification signal is larger than a voltage level, the returning unit notifies the electronic device, such that the electronic device returns a voltage request signal. The power supplying apparatus selectively sends out one of a plurality of DC voltage signals to the electronic device according to the voltage request signal.