139 results about "Center tap" patented technology

The invention discloses an ultra-wideband 180-degree phase shift circuit which comprises a radio frequency signal input end, a radio frequency signal output end, an ultra-wideband balun with a center tap and a stub compensation line, a first matching compensation network, a second matching compensation network, a differential signal switch selection circuit and a control circuit. The ultra-wideband balun can realize conversion between a single-ended signal and a differential signal in an ultra-wideband frequency range, a first differential output port of the ultra-wideband balun is connected with one end of the first compensation matching network, and a second differential output port of the ultra-wideband balun is connected with one end of the second compensation matching network; a first differential port of the differential signal switch selection circuit is connected with the other end of the first compensation matching network, and a second differential port of the differential signal switch selection circuit is connected with the other end of the second compensation matching network; and the control circuit is used for controlling the differential signal switch selection circuit to switch and output 0-degree and 180-degree radio frequency signals. According to the invention, low-error phase shift precision can be provided within the frequency range of 2-20GHz and the relative bandwidth of 160%.

A multi-level inverter using cascaded H-bridge modules, where each module can balance its at least two charge storage elements by means of voltage equalization. Modules are arranged in series into at least one cascade inverter phase with optional center taps, and modules communicate with a control unit by being addressed over at least one serial communication bus. Additional features that can be included in embodiments are the configuration of modules to react to multiple specific addresses in order to increase the maximum output voltage slew rate, metal circuit breaking springs to provide fusing within modules, and the ability to interconnect multiple physically distinct inverters into a single unit. This inverter is predominantly intended for electric vehicle applications, and the optional incorporation of a switching array allows the possibility for power transfer to or from a wide range of voltage sources including other inverters.

The invention discloses a voltage-controlled oscillator and a sub-sampling phase-locked loop, and relates to the technical field of phase-locked loops. The voltage-controlled oscillator comprises two negative resistance transistors and a three-layer coil structure; the three layers of coil structures are respectively a drain coil, a grid coil and a source coil from outside to inside; the gate coil and the drain coil are both of an octagonal structure, and the source coil is of a splayed structure; the drain coil, the source coil and the grid coil are all provided with center taps, the center tap of the source coil is connected with a power voltage module, the center tap of the drain coil is grounded, and the connection point of the center tap of the source coil and the power voltage module and the connection point of the center tap of the drain coil and the ground are located on the same side of the drain coil. And the two negative resistance transistors are positioned on the other side of the drain coil. According to the invention, automatic alignment of second harmonics in a wide frequency range is realized. And meanwhile, an extra chip area is not increased.

The invention discloses a self-voltage-sharing bipolar phase-shifted full-bridge converter based on a coupling inductor, which comprises a full-bridge circuit, a high-frequency transformer Tr, a leakage inductor Lk, a blocking capacitor Cb, a full-bridge rectifying circuit, filter inductors Lf1 and Lf2 and a bipolar output circuit, a leakage inductor and a blocking capacitor are connected in series and then connected to the primary side of the high-frequency transformer; the high-frequency transformer comprises a primary winding and a secondary winding with a center tap, and the secondary winding is connected with the full-bridge rectifier circuit; the invention further provides a control method of the bipolar phase-shifted full-bridge converter. The novel bipolar port self-voltage-equalizing method based on the coupling inductor is adopted, output port voltage balance under any load condition is achieved without adding any additional device and voltage-equalizing control, and the method has the advantages of being low in cost, easy to control and wide in adjusting range.

This invention belongs to the field of wireless communication technology. It provides a differential amplifier system and a method for improving common-mode stability. The invention uses a large decoupling capacitor C1 at the transformer center tap to provide AC ground, and a common-mode resistor R1 to improve the circuit's common-mode stability. Since the common-mode resistor R1 is not in the differential signal loop path, the use of common-mode resistor technology does not affect differential-mode performance. Because the required common-mode resistor value is small, this design occupies a small layout area. This invention solves the problem of low common-mode stability in differential amplifiers.

This invention discloses a millimeter-wave broadband high harmonic suppression tripler, comprising an input matching network, a time-domain shaping tripler unit, and a differential common-source output stage. The proposed time-domain shaping tripler unit employs transistor pairs with different gate widths and bias voltages to superimpose two sets of voltage signals of different amplitudes in the time domain, thereby enhancing the inherent harmonic suppression of the tripler unit. Furthermore, by connecting a common-mode impedance control in series at the center tap of the primary inductor coil of the output transformer of the tripler unit, the output power of the third harmonic is further improved. The input matching network achieves single-ended to differential conversion, with its primary and secondary coil center taps grounded and open-circuited respectively in a counterintuitive manner, improving differential-mode balance and common-mode stability. Simultaneously, by using a series-coupled inductor, the quality factor of the transistor input impedance is reduced, improving the bandwidth performance of the tripler.

The invention relates to a method for heating a high-voltage battery (2) of a high-voltage system (1) of an electrically powered vehicle, wherein the high-voltage system (1) comprises an inverter (4) and at least one capacitor (C_X1, C_X2) in an intermediate circuit, wherein the inverter (4) has two high-voltage potentials (P+, P-) as DC voltage terminals and three phase terminals to which an electric machine (3) is connected, wherein the inverter (4) has a plurality of semiconductor switches (S1 to S12), wherein energy is transferred between the high-voltage battery (2) and the at least one capacitor (C_X1, C_X2) using the semiconductor switches (S1 to S12), the at least one capacitor (C_X1, C_X2) and the motor inductances (L1, L2, L3) of the electric machine (3), wherein the inverter (4) is designed as a 3-level inverter, and wherein the intermediate circuit is a series connection of two Capacitors (C_X1,C_X2) with a center tap (M) connected to the inverter (4), wherein energy is alternately transferred between the two capacitors (C_X1, C_X2) using the semiconductor switches (S1 to S12) of the inverter (4) in order to cause a correspondingly reversing current flow between the high-voltage battery (2) and the capacitors (C_X1, C_X2) and thus to heat the high-voltage battery (2).

A method for ancillary supply in a modular multi-level converter with a plurality of modules arranged in strands, a respective module including at least two half bridges with semiconductor switches and at least one energy accumulator, which are interconnected in parallel. In the respective module, an at least single-core input terminal is formed through respective center tapping in at least one half bridge on an input side, and an at least single-core output terminal is formed through respective center tapping in at least one half bridge on an output side. The strands are interconnected into at least one star point on the at least single-core input terminal of a first module in the respective strand. A respective phase of a supply voltage in a high-voltage system is formed on the at least single-core output terminal of a last module in the respective strand.

The utility model relates to the technical field of electronic power, in particular to a positive and negative voltage output circuit based on coreless transformer isolation, which comprises a cross-coupled oscillation circuit, a coreless transformer and a rectification filter circuit, the cross-coupled oscillation circuit generates sine wave oscillation, and energy is transmitted to a secondary coil through a primary coil of the coreless transformer. The secondary coil adopts a center tap structure, the rectification filter circuit receives signals transmitted by the secondary coil, and stable positive and negative voltage output is realized through rectification and filtering processing. High-efficiency energy transmission is realized through the coreless transformer, the voltage isolation capability is improved, electromagnetic interference is reduced, and the coreless transformer has the advantages of compact structure, low cost, high power density and the like, and is suitable for solid-state switch driving, high-frequency power conversion and other electronic power systems.

Embodiments herein disclose an inductor-capacitor voltage controlled oscillator (LC-VCO) circuit. The LC-VCO circuit includes: an LC tank circuit including a center tap inductor connected in parallel with a capacitor bank without a varactor, where the LC tank circuit resonates to generate an oscillation voltage; and a control circuit connected to a varistor capacitance circuit, where the varistor capacitance circuit includes a varistor based on a voltage controlled transistor in series with at least one capacitor, the varistor capacitance circuit is connected in parallel with the LC tank circuit and connected to a negative transconductance circuit. The control circuit includes an error amplifier and a conversion circuit, and is configured to generate an output control voltage based on an input phase-locked loop (PLL) control voltage that controls a capacitance value of the varistor capacitance circuit through the variable resistor.

A multi-level inverter using cascaded H-bridge modules, where each module can balance its at least two charge storage elements by means of voltage equalization. Modules are arranged in series into at least one cascade inverter phase with optional center taps, and modules communicate with a control unit by being addressed over at least one serial communication bus. Additional features that can be included in embodiments are the configuration of modules to react to multiple specific addresses in order to increase the maximum output voltage slew rate, metal circuit breaking springs to provide fusing within modules, and the ability to interconnect multiple physically distinct inverters into a single unit. This inverter is predominantly intended for electric vehicle applications, and the optional incorporation of a switching array allows the possibility for power transfer to or from a wide range of voltage sources including other inverters.

Provided is a phase-shifted full bridge center-tapped converter with a protection circuit. The converter includes a primary side circuit having a full bridge structure and a secondary side circuit having a center-tap structure. The converter further includes a protection circuit configured to transfer energy from the secondary side circuit to the primary side circuit, based on an operation stop.

A wireless circuit is provided that includes at least a first amplifier, a second amplifier, and a power distribution transformer coupled to the first amplifier and the second amplifier. The first amplifier may include a first input transistor, and the second amplifier may include a second input transistor. The power distribution transformer may include: a primary coil; a first secondary coil having a terminal coupled to a gate terminal of the first input transistor and having a center tap configured to receive a first bias voltage; and a second secondary coil having a terminal coupled to the gate terminal of the second input transistor, and having a center tap configured to receive a second bias voltage. The first amplifier and the second amplifier may output a signal to a power combining transformer. The power combination transformer may have a first primary coil, a second primary coil, and a secondary coil all disposed within a single compact transformer footprint.

An RF differential system comprises an RF differential circuit and a winding connected to the RF differential circuit. The winding has a center tap. A bias terminal is provided to receive a bias signal. A suppression network is connected between the center tap and the bias terminal.

The invention belongs to the technical field of avionics testing and signal simulation, and discloses an LVDT analog simulation circuit and a signal simulation method thereof, and the LVDT analog simulation circuit comprises a main control module, a communication interface module, an excitation signal processing module and a sensor signal simulation output module. The main control module receives an external displacement setting instruction through the communication interface; the excitation signal processing module comprises a DAC unit and an excitation conditioning unit and is used for generating amplitude control voltage and conditioning an external LVDT excitation signal; the sensor signal simulation output module serves as a core and comprises a difference value control unit, a sum value control unit, a summation unit and a differencing unit, a conditioned excitation signal and amplitude control voltage are synthesized through an analog multiplier and an operational amplifier circuit, and finally three-phase differential signals (a high end, a low end and a center tap) simulating a real LVDT sensor are output. A mechanical LVDT is replaced by a full-electronic mode, high-precision, programmable and flexible simulation of displacement signals is achieved, the device is particularly suitable for occasions needing high-reliability LVDT interface testing and verification such as an aviation flight control system, and the device has the advantages of being low in cost, high in flexibility and easy to integrate automatic testing.

This suppresses stress on the switching element, enabling pre-charging in a short time. [Solution] A transformer including a first switching element with one end connected to a first terminal, a second switching element connected between the other end of the first switching element and a second terminal, a third switching element with one end connected to the first terminal, a fourth switching element connected between the other end of the third switching element and a second terminal, a first winding connected between the other end of the first switching element and the other end of the third switching element, and a second winding magnetically coupled to the first winding; an inductor section connected between the center tap of the second winding and a third terminal; a fifth switching element connected between one end of the second winding and a fourth terminal; a sixth switching element electrically connected between the other end of the second winding and a fourth terminal; a first switch connected between one end of the fifth switching element and a third terminal; and a second switch connected between one end of the sixth switching element and a third terminal.

This invention discloses a bidirectional bipolar input / output DC-DC converter topology, which is an asymmetric structure centered on a high-frequency transformer T1 with a center tap. It includes a first circuit unit, the high-frequency transformer T1, and a second circuit unit connected in sequence. The first circuit unit employs a half-bridge or full-bridge structure, and the second circuit unit also employs a half-bridge or full-bridge structure. At least one of the first and second circuit units uses a bidirectional switching structure with two switches connected in reverse series, enabling mutual conversion between the bipolar voltages of the first and second circuit units, thus multiplying the voltage variation range on the output side. This invention improves upon traditional bipolar DC-DC converters, achieving stable and adjustable voltage gain by changing the switching frequency while realizing high-frequency, high-efficiency bipolar DC-DC conversion, significantly improving the converter's wide-range voltage supply capability.

The present invention relates to a method for operating power electronics (1) for converting electrical energy from a vehicle electrical system (201) into heat by means of a consumer arrangement (50) consisting of two consumers (51). The power electronics (1) has three parallel connected half-bridges (2, 3, 4) each with a center tap (9) and two switching elements (10, 11), wherein the switching elements (10, 11) are switched in such a way that they connect the consumers (51) individually to the vehicle electrical system (201) and to each other. The invention also relates to a power electronics arrangement (100) with such power electronics (1) and a computer program product for carrying out the method.

The invention discloses a signal transmission device and electronic equipment, the signal transmission device comprises an interface connector, a first signal converter and a signal isolation assembly, the interface connector comprises a first pin and a second pin, the first signal converter comprises a third pin and a fourth pin, the first pin is connected with the third pin, and the second pin is connected with the fourth pin. The first pin is connected with the first pin, the second pin is connected with the fourth pin, and a center tap of a line pair formed by the third pin and the fourth pin is connected with the signal isolation assembly, so that the first pin and the second pin are grounded. Therefore, the first pin and the second pin of the interface connector are grounded and can be connected with the first signal converter, so that interaction of network port signals with the first signal converter can be realized, and the signal transmission device can be applicable to transmission scenes of network port signals with various rates.

An inductor device includes a first trace, a second trace, an input / output terminal, a center tap terminal, and a staggered connection. The first trace is located on a first layer. The second trace is located on the first layer. The input / output terminal is disposed on a first side of the inductor device. The center tap terminal is disposed on a second side of the inductor device. The staggered connection is disposed on a third side or a fourth side of the inductor device and is configured to couple the first trace or the second trace. The input / output terminal and the center tap terminal are not connected by the staggered connection.

The invention relates to a resonant converter comprising a transformer (T) which comprises a primary winding (L6) and a secondary winding (L1, L2), wherein - the secondary winding (L1, L2) is divided into a first secondary winding section (L1) and a second secondary winding section (L2); - the primary winding (L6), the first secondary winding section (L1) and the second secondary winding section (L2) are arranged next to one another on a common limb of a magnetic core of the transformer (T); - the primary winding (L6) is arranged between the first secondary winding section (L1) and the second secondary winding section (L2); - the first secondary winding section (L1) and the second secondary winding section (L2) are each spaced apart from the primary winding (L6) by a distance (a); - the first secondary winding section (L1) and the second secondary winding section (L2) are interconnected in a centre tap circuit; - the first secondary winding section (L1) is connected in series with a first rectifier element (M1) in a first rectifier branch and the second secondary winding section (L2) is connected in series with a second rectifier element (M2) in a second rectifier branch; and - a discharge unit is arranged in the resonant converter and can be used to discharge energy stored in leakage inductances of the secondary winding sections (L1, L2) during a charge reversal of the first rectifier element (M1) and / or the second rectifier element (M2).

The invention discloses a resonant power converter and a control method thereof. The resonant power converter comprises two bridge arms, a first resonant connection point and a second resonant connection point of the resonant power converter are connected with the two ends of a first side winding respectively, and at least one of the first bridge arm, the second bridge arm and a center tap of the first side winding is connected with an input circuit through an input inductor. The first bridge arm operates in three switching modes in the switching period, and the total operation time of the second switching mode and the third switching mode is equal to the operation time of the first switching mode. The second bridge arm operates in the same switching mode as the first bridge arm, but the phase difference between the driving signal of each switching tube and the corresponding signal of the first bridge arm is 180 degrees. When the first bridge arm operates in the first switching mode, the input voltage of the second side winding is a first voltage value; when the first bridge arm operates in the second switching mode or the third switching mode, the input voltage of the second side winding is a second voltage value.

The utility model relates to the technical field of RJ45 electrical ports, in particular to an RJ45 electrical port surge protection structure and an RJ45 electrical port module, which comprise a structured shell, a circuit board, an RJ45 connector, a network transformer and a PHY chip, the RJ45 connector, the network transformer and the PHY chip are arranged on the circuit board, and the network transformer is connected between the RJ45 connector and the PHY chip; physical isolation areas are arranged between the secondary ground and the primary ground, the positions of the physical isolation areas on all wiring layers of the circuit board are consistent, and a center tap of a primary coil of the network transformer connects a high-voltage capacitor to the primary ground. And the primary ground is connected to the ground through the structured shell and an equipment port connected with the structured shell by an electroplating area with windows on two sides on the circuit board. According to the utility model, the formed discharge path can ensure that the impact surge from the network cable is rapidly, stably and safely discharged to the ground, thereby ensuring that the circuit board is effectively protected, and preventing the normal communication of the system from being influenced by the failure of the electric port module.

The invention relates to a double inverter (1) comprising a first inverter (2.1) and a second inverter (2.2), each comprising three half-bridges made of semiconductor switches (S1 to S12), each with three phase connections, between which an electric machine (3) is connected, the machine having three stator windings (L1, L2, L3), wherein a switchable connection (4) is provided between the high-voltage potentials (HV+, HV-) of the two inverters (2.1, 2.2), the first of which is connected to a battery (5), wherein a disconnecting element (S13) is arranged in one of the two high-voltage potentials (HV+, HV-) of the connection (4) between the battery (5) and the second inverter (2.2) and / or between the two inverters (2.1, 2.2), wherein the battery (5) comprises two electrically series-connected partial batteries (5.1, 5.2).2) has a central tap which is connected via a unidirectionally or bidirectionally lockable switching element (S_Umladen) to a connection point of a switching function or switching device (7) through which three terminals of the stator windings (L1, L2, L3) of the electric drive machine (3) can be switched to a star point (8).

This invention discloses a long-term balanced control method for the output of two independent power supply devices. The method controls these two independent power supply devices, each drawing power from the center tap of a battery pack. The first power supply draws power from the first terminal (e.g., positive terminal) and the midpoint of the battery pack, while the second power supply draws power from the midpoint and the second terminal (e.g., negative terminal). At least the first power supply device is controlled according to the following method. This balancing scheme ensures long-term balanced output power from the two DC power supply devices, extending the battery pack's lifespan without requiring additional hardware. It is also applicable to other applications requiring long-term balanced power output. After three months of operation, the voltage difference between the two power supplies controlled by this method is only about 10V, which helps extend the battery pack's lifespan, and the output power of the two power supply devices remains balanced over a long period.

The invention discloses a push-pull inverter and electronic equipment. The push-pull inverter comprises an inverter circuit, a center tapped transformer and a rectification circuit. The inverter circuit comprises a first switch tube, a second switch tube, a third switch tube and a fourth switch tube which are connected in series; a first access end of the first switching tube and a first access end of the second switching tube are used for being connected with a direct-current power supply, and a second access end of the first switching tube is connected with a first access end of the third switching tube and a first end of a primary side of the center-tapped transformer. The second access end of the second switch tube is connected with the first access end of the fourth switch tube and the second end of the primary side of the center tapped transformer, the second access end of the third switch tube is connected with the second access end of the fourth switch tube, and the second access end of the third switch tube and the second access end of the fourth switch tube are both source electrodes or drain electrodes. The push-pull inverter provided by the invention can provide a low-impedance follow current path for the current of the center-tapped transformer, so that the switching loss is reduced.

The invention relates to a converter device (100) of an electrically operated vehicle for transforming a first DC voltage of an electrical energy storage device of the vehicle to a second DC voltage of an on-board network of the vehicle, comprising a first DC voltage connection (120), a galvanically isolating voltage converter (110) which has an inverter unit (140), a transformer unit (70) and a rectifier unit (150), and a second DC voltage connection (130). The inverter unit (140) has at least three half-bridges (10, 20, 30) each with at least two electrically series-connected switches (12, 14; 22, 24; 32, 34) each with a center tap (16, 26, 36), wherein the center tap (16, 26, 36) of a half-bridge (10, 20, 30) is electrically connected to a terminal (82, 84, 86, 88) of a primary winding (74, 76, 78) of the transformer unit (70).The inverter unit (140) is designed to operate at least two of the half-bridges (10, 20, 30) simultaneously. The invention further relates to a method for operating a converter device (100).

An inductor device includes a first trace, a second trace, an input / output terminal, a center-tapped terminal, and an interlaced connection portion. The first trace is located on a first layer. The second is located on the first layer. The input / output terminal is disposed at a first side of the inductor device. The center-tapped terminal is disposed at a second side of the inductor device. The interlaced connection portion is disposed at a third side or a fourth side of the inductor device, and coupled to the first trace or the second trace. No interlaced connection structure is disposed along a connection line between the input / output terminal and the center-tapped terminal.

This invention discloses a light-emitting stitching driver, control system, and control method. The driver includes a voltage regulation unit, an inverter unit, and a control unit. The voltage regulation unit adopts a PWM-to-DAC feedback mechanism, whereby the PWM signal output by the microcontroller is filtered by RC and fed back to the FB pin of the DC-DC chip to achieve continuous voltage regulation. The inverter unit uses a center-tapped transformer and a dual MOSFET topology. The control unit outputs a 100kHz carrier SPWM signal, and the frequency step adjustment from 200Hz to 2.5kHz is achieved by changing the number of sampling points in the half-cycle of the sine wave. This invention simplifies the circuit structure, reduces costs, and realizes digital dimming and frequency modulation, making it suitable for automotive interior ambient lighting.

The invention relates to a motor vehicle with motor vehicle-to-grid functionality, comprising an electric machine, a high-voltage battery, an inverter, and a disconnect switch, wherein the high-voltage battery is connected to the inverter to supply the inverter with energy, and the inverter is connected to the electric machine and configured to supply the electric machine with energy, wherein the inverter is configured as a three-phase inverter, wherein the inverter comprises a first inverter circuit configured to supply the electric machine and a second inverter circuit configured to supply the electric machine, wherein the inverter is configured as a resonant inverter, and wherein the electric machine is configured as an open-end winding configuration with split input windings for each of the phases and a three-phase center tap, wherein the center tap is connected to a disconnect switch.