6 results about "Unbalanced line" patented technology

The invention provides a flexible interconnection micro-grid group shared energy storage charge state equalization control method based on a dynamic convergence algorithm, and the method comprises the steps: firstly constructing a flexible interconnection micro-grid group model, employing a distributed and centralized cooperative layered cooperative control architecture, and constructing a layered communication architecture; then establishing a model in which p energy storage units are connected in parallel on the direct current side of the flexible interconnection micro-grid group, wherein the output power of a storage battery flows through a bidirectional DC-DC converter and is connected with a direct current bus; secondly, based on traditional V-I droop control, a self-adaptive I-SOC droop coefficient is introduced into a new V-I droop control expression, the droop coefficient is changed in real time according to the SOC of the energy storage unit and the magnitude of the output current, and voltage secondary control is introduced to maintain the stability of the DC bus voltage; and finally, the output voltage, the output current and the SOC value of the local energy storage unit are obtained, the average value of the output voltage, the output current and the SOC is calculated by adopting a dynamic convergence algorithm, and the convergence speed is accelerated. The method can improve the transient current sharing precision and the state of charge balance level of the energy storage unit in the scene of unbalanced line impedance, and avoids the reduction of the service life due to the excessive charging and discharging of the stored energy.

A power amplifier circuit includes an input terminal, amplifiers, phase shifters, a converter circuit, and an output terminal. Each of the amplifiers is configured to amplify an input signal that is a radio-frequency signal received through the input terminal. The converter circuit is configured to convert a pair of balanced lines to an unbalanced line. The output terminal is coupled to the unbalanced line. The converter circuit includes balanced terminals that are respectively coupled to corresponding ones of the pair of balanced lines. The phase shifter is coupled between the output of the amplifier and the output of the amplifier. The phase shifter is coupled between the output of the amplifier and the output of the amplifier. The phase shifter is coupled between the output of the amplifier and the balanced terminal. The output of the amplifier is coupled to the balanced terminal.

The present application provides a kind of balanced-unbalanced transformer that can match the impedance between the circuit of front stage and the circuit of rear stage in wider frequency band.The balanced-unbalanced transformer has: the first wiring, with the first end connected with the first balance line of one of transmission balanced signal and the second end connected with the second balance line of another of transmission balanced signal;The second wiring has the first end grounded and the second end;The third wiring has the first end connected with the second end of the second wiring and the second end connected with the unbalanced line of transmission unbalanced signal, and is electromagnetically coupled with the second wiring;The first capacitor has the first end connected with the first end of the third wiring and the second end grounded;And the second capacitor has the first end connected with the second end of the third wiring and the second end grounded, and the first wiring is electromagnetically coupled with at least one of the second wiring and the third wiring.

A balun includes a first wire including a first end connected to a first balanced line transmitting one of balanced signals and a second end connected to a first reference potential; a second wire including a first end connected to a second balanced line transmitting another one of the balanced signals and a second end connected to the first reference potential; a third wire that includes a first end and an open second end and is electromagnetically coupled to the first wire; a fourth wire that includes a first end connected to the first end of the third wire and a second end connected to an unbalanced line transmitting an unbalanced signal and is electromagnetically coupled to the second wire; a first capacitor connected in parallel with a part of the first wire; and a second capacitor connected in parallel with a part of the second wire.

A power amplifier circuit includes an input terminal, an output terminal, amplifiers, a balun, and semiconductor substrates. The amplifier amplifies a radio-frequency signal received at the input terminal. The amplifier further amplifies the radio-frequency signal amplified by the first amplifier. The balun is connected to the amplifier and converts an unbalanced line into two balanced lines. The amplifier and the amplifier are formed on the semiconductor substrate. One of the balanced lines is connected to a terminal of the output terminal. The other of the balanced lines is connected to a terminal of the output terminal. The frequency of a radio-frequency signal to be transmitted is 100 GHz or more. The balun is formed on the semiconductor substrate.

Provided is a high-efficiency power amplification circuit that uses a differential structure to amplify power. The power amplification circuit includes: an amplifier (107) that amplifies one signal (RF2) of a differential signal; an amplifier (108) that amplifies the other signal (RF3) of the differential signal; a transformer (101) having a primary winding (1011) and a secondary winding (1012) electromagnetically coupled to the primary winding (1011), one end of the primary winding (1011) being connected to the amplifier (107) and the other end being connected to the amplifier (108), one end of the secondary winding (1012) being connected to an unbalanced line (106) that transmits an unbalanced signal, and the other end being connected to a ground; and a capacitor (102) having one end connected to a midpoint of the primary winding (1011) and the other end connected to the ground.