28 results about "Center tap" patented technology

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.

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.

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 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 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.

This invention provides an ultra-fast commutation square-wave AC welding power supply, comprising: a rectifier bridge circuit for rectifying AC to DC; a filter and voltage regulator circuit for eliminating high-order ripple and obtaining smooth DC; a full-bridge inverter circuit for converting DC to high-frequency AC; a high-frequency transformer for isolation and voltage reduction; a secondary full-bridge rectifier circuit for converting high-frequency AC to DC; a coupling inductor for coupling; a half-bridge inverter circuit for converting DC to AC square waves; and a constant voltage clamping circuit; the load is connected between the midpoint of the half-bridge inverter circuit and the center tap of the high-frequency transformer. This power supply enables faster commutation of square-wave AC current and energy recovery during the commutation process, thereby improving the stability of the AC welding process and the conversion efficiency of the square-wave AC welding power supply.

Systems, methods and software products comprising: providing cell measurement signals (CMs) associated with electrical energy storage component stack (CMs are referenced to ground potential (GP) at a local ground terminal (LGT)); providing via a first interface (FI) CM(s) as a first differential cell data signal (FDCDS) (wherein FI comprises differential terminals (DTs); providing FDCDS at a first winding (FW) of a first transformer (FT) connected to FI; establishing a coupling between GP and each terminal of FW via a bypass capacitor (BC) disposed between a DT and LGT; and referencing a center tap (CT) located between FT's winding terminals to LGT to establish a low-impedance coupling between CT and LGT, and isolate DC potential at LGT from DC potential of DTs. The low-impedance coupling is such that it reduces parasitic voltage drop at CT caused by high-frequency common-mode noise current due to noise signal transferred via parasitic capacitive coupling between FT's windings.

An electronic device may include wireless circuitry having a radio-frequency mixer. The mixer may include an input stage, an output stage, and a transformer coupled between the input and output stages. The input stage may include input transistors forming a transconductance cell. The output stage may include two pairs of mixer transistors configured to receive an oscillating signal. The transformer may include a primary coil coupled between the input transistors and a secondary coil coupled between the two pairs of mixer transistors. A harmonic rejection circuit may be coupled to a center tap of the secondary coil. The harmonic rejection circuit may be configured to mitigate harmonic signals that are associated with the oscillating signal and that are generated at the inputs of the output stage. The harmonic rejection circuit may include an inductor, an optional capacitor, an optional current source transistor, or other passive component.

The invention relates to a method for operating a high-voltage system (1) for an electrically operated vehicle, wherein the high-voltage system (1) comprises at least one high-voltage battery (2) formed by two battery elements (2.1, 2.2) connected electrically in series, at least one electric machine (4) having three stator windings (L1, L2, L3), and at least one inverter (3) for converting a DC voltage from the high-voltage battery (2) into a three-phase AC voltage for supplying the electric machine (4), wherein the inverter (3) has three half-bridges each having an upper semiconductor switch (S1, S3, S5) and a lower semiconductor switch (S2, S4, S6), wherein the high-voltage battery (2) has a battery centre tap (6) between the battery elements (2.1, 2.2), wherein the stator windings (L1, L2, L3) are interconnected to form a neutral point (5), wherein the battery centre tap (6) is couplable to the neutral point (5) by a first switching element (S_MA), wherein either a second switching element (S_DC_400_P) is arranged between the neutral point (5) and the positive charging connection (DC_P) or a second switching element (S_DC_400_N) is arranged between the neutral point (5) and the negative charging connection (DC_N), wherein additionally a third switching element (S_DC_800_P) is arranged between a positive charging connection (DC_P) and a positive pole of the high-voltage battery (2), wherein a fourth switching element (S_DC_N) at a negative high-voltage potential (HV-) is arranged between a negative charging connection (DC_N) and a negative pole of the high-voltage battery (2), wherein the high-voltage system (1) is operated in an operating state with simultaneous DC boost charging of the high-voltage battery (2) at a charging station (10) with a voltage that is lower than a voltage of the high-voltage battery (2) and charge transfer between the battery elements (2.1, 2.2), wherein the first switching element (S_MA), the second switching element (S_DC_400_P) and t

Wireless circuitry is provided that includes a transformer having a primary coil and a secondary coil, a first group of switchable capacitors coupled to a first terminal of the primary coil, a second group of switchable capacitors coupled to a second terminal of the primary coil, and capacitance measurement circuitry selectively coupled to a center tap of the primary coil during a measurement mode. The capacitance measurement circuitry can include a current source, a current sink, a comparator, a voltage generator for providing one or more threshold / reference voltages to the comparator, a frequency measurement circuit, and a capacitance calculation circuit configured to compute a capacitance of the first and second groups of switchable capacitors.

The invention relates to a high-voltage system (1) for an electrically powered vehicle, comprising an inverter (2), an electric drive motor (3) with three stator windings (L1, L2, L3) forming a star point (6), and a battery (4) for supplying voltage to the inverter (2), wherein the inverter (2) is connected to the drive motor (3) to supply it with a three-phase alternating voltage, wherein the inverter (2) is designed as a three-level inverter and has on one DC side a positive high-voltage potential (HV+), a negative high-voltage potential (HV-) and a neutral point (NP) between the two high-voltage potentials (HV+, HV-), wherein the battery (4) has two electrically series-connected sub-batteries (4.1, 4.2) and is connected to the positive high-voltage potential (HV+) and the negative high-voltage potential (HV-), wherein there is a neutral point (NP) between the two sub-batteries (4.1, 4.2).2) a center tap (MA) is brought out and connected to the neutral point (NP).

The invention relates to a high-voltage system (1) for an electrically powered vehicle, wherein the high-voltage system (1) comprises at least one high-voltage battery (2) formed from two electrically connected partial batteries (2.1, 2.2), at least one electric machine (4) with three stator windings (L1, L2, L3) and at least one inverter (3, 13, 23, 33, 43) for converting a DC voltage from the high-voltage battery (2) into a three-phase AC voltage for supplying the electric machine (4), wherein the high-voltage battery (2) has a central tap (5) between the partial batteries (2.1, 2.2).2) having the stator windings (L1, L2, L3) connected to form a star point (6), wherein the center tap (5) can be coupled to the star point (6) by a switch (S_Center), wherein a first switching element (S_Highside) is arranged between a positive high-voltage potential (HV+) at the inverter (3, 13, 23, 33, 43) and a positive terminal of the high-voltage battery (2), and that a second switching element (S_Lowside) is arranged between a negative high-voltage potential (HV-) at the inverter (3, 13, 23, 33, 43) and a negative terminal of the high-voltage battery (2), wherein the switching elements (S_Highside, S_Lowside) each have a diode function for charging one of the sub-batteries (2.1, 2.2).

This application relates to the field of battery balancing technology, and provides a battery balancing system and an electric vehicle. The battery balancing system includes N battery packs to be balanced, a magnetic core, N inductor windings, a half-bridge drive circuit, and N switching device groups. Each inductor winding corresponds to one battery pack, and each inductor winding is wound on the magnetic core, with each inductor winding including a center tap. The half-bridge drive circuit is configured to generate an alternating drive signal. The first and second switching devices in the same switching device group are configured to alternately turn on and off under the control of the alternating drive signal. The N inductor windings are magnetically coupled through the magnetic core. The voltage difference between the battery packs drives the current change in each inductor winding, and energy transfer between the battery packs occurs through magnetic coupling. The battery balancing system of this application only requires a magnetic core, inductor windings, a half-bridge drive circuit, and switching device groups to achieve active balancing, reducing costs.

Embodiments herein disclose an inductor-capacitor voltage-controlled oscillator VCO circuit. The LC-VCO circuit includes a center tapped inductor connected in parallel with a varactorless capacitor bank, where the LC tank circuit resonates to produce an oscillating voltage; and a control circuit connected to a varistor capacitance circuit that comprises a voltage-controlled transistor based variable resistor in series with at least one capacitor, the varistor capacitance circuit being connected in parallel with the LC tank circuit and to a negative trans-conductance circuit. The control circuit includes an error amplifier and a conversion circuit configured to generate an output control voltage based on an input phase locked loop (PLL) control voltage, the output control voltage controlling a value of a capacitance for the varistor capacitance circuit through the variable resistor.

This application provides a radio frequency (RF) device and its inductor. The RF device includes a power amplifier circuit, a signal coupling circuit, an extraction circuit, and a harmonic filter circuit. The power amplifier circuit amplifies a differential signal to output a signal to be filtered. The signal coupling circuit includes a primary inductor and a secondary inductor. The signal coupling circuit receives the signal to be filtered through the primary inductor and outputs a single-ended signal from the secondary inductor. The extraction circuit has a center tap. The extraction circuit couples with the primary inductor and outputs a common-mode signal from the center tap. The harmonic filter circuit performs harmonic filtering on the single-ended signal based on the common-mode signal, so that the secondary inductor of the signal coupling circuit outputs a filtered signal.

The application relates to the technical field of vehicle charging, and discloses a charging system for a vehicle, a charging control method and device, and the vehicle. The vehicle comprises a control assembly and an electric drive assembly, the control assembly is integrated with an inverter, the electric drive assembly is integrated with a motor, three-phase lines of the motor are connected with three-phase output ends of the inverter, the charging system comprises: a battery unit connected with the inverter through a direct-current bus, a charging unit, an input end of the charging unit is connected with a charging port of the vehicle, a first output end of the charging unit is connected with a center tap of the motor, and a second output end of the charging unit is connected with the inverter; wherein the charging unit is integrated in a shell of the electric drive assembly and is arranged in a cooling oil circuit of the electric drive assembly. The application solves the problems that the related technology adopts an external boost charging box to reduce the space of a cockpit, the large-current switching device connected on the direct-current bus in the charging system has a heat dissipation problem, the safety hidden danger is reduced, and the boost charging effect is improved.

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

The invention relates to an inverter (12) for an electric motor (14) of a reversible seat belt retractor (10) and to a reversible seat belt retractor (10). The inverter (12) comprises at least two half-bridges (18) arranged in parallel, each having at least two switching means (20, 22). Each half-bridge (18) has a center tap (24) between the at least two switching means (20, 22) for providing a corresponding output signal for the electric motor (14). The inverter (12) is coupled at input terminals to a DC voltage source (26). The inverter (12) has at least one boost converter (27) between the DC voltage source (26) and the at least two half-bridges (18), which is provided for supplying the at least half-bridges (18) with a supply voltage having an increased voltage amplitude compared to an input voltage provided at the input terminals. The inverter (12) comprises a control device (46) coupled at least to the boost converter (27) and provided for activating the boost converter (27) before or during a tightening phase of the reversible seat belt retractor (10).

A powertrain (100), comprising a first driving motor (201), a second driving motor (202), and a motor controller (13), wherein the motor controller (13) comprises a first power circuit (2031), a second power circuit (2032), a first capacitor, a second capacitor, and a controller (2033), and the controller (2033) controls a center tap of a three-phase winding of the first driving motor (201) to be connected to a center tap of a three-phase winding of the second driving motor (202). An electric vehicle (10), comprising a power battery (15), wheels, and the powertrain (100). A power battery heating method, applied to the motor controller (13), which comprises the first power circuit (2031), the second power circuit (2032), the first capacitor, the second capacitor, and the controller (2033), and controls the center tap of the three-phase winding of the first driving motor (201) to be connected to the center tap of the three-phase winding of the second driving motor (202). Such a configuration enables the first power circuit and the second power circuit to output pulse current of a wider range, thereby further increasing the rate of pulse heating of the power battery, not only improving the temperature rise speed of the power battery and shortening the charging waiting time and one-key vehicle preparation time, but also enhancing the flexibility and efficiency of heating of the power battery.

The application relates to a network transformer and a connector, the network transformer comprising a main magnetic ring, a primary coil and a secondary coil, the primary coil comprising a primary triplex wire, the primary triplex wire comprising a first wire, a second wire and a third wire which are twisted together, the secondary coil comprising a secondary triplex wire, the secondary triplex wire comprising a fourth wire, a fifth wire and a sixth wire which are twisted together, and further comprising a seventh wire, the end wire head of the first wire, the start wire head of the fifth wire and the end wire head of the seventh wire being twisted together to form a first center tap of the primary coil, the end wire head of the second wire and the end wire head of the fourth wire being twisted together to form a first double twisted wire, the start wire head of the third wire and the start wire head of the sixth wire being twisted together to form a second double twisted wire, and the first double twisted wire and the second double twisted wire being twisted together to form a second center tap of the secondary coil. The technical scheme disclosed by the application can solve the problem that the existing network transformer winding structure cannot meet the high-speed network transmission requirement.

Methods and apparatus for reducing fixed charge in a dielectric layer during deposition are described. A dielectric layer is deposited on a substrate chucked to a support surface of an electrostatic chuck and the current passing through the center tap of the electrostatic chuck is measured. A variable resistor of the center tap is adjusted to control the current flowing through the substrate. Methods for chamber matching using the fixed charge are also described.

This application discloses an orthogonal signal generator and electronic device, belonging to the field of power electronics technology. The orthogonal signal generator includes: a transformer, comprising a primary coil and a secondary coil; a first coupling capacitor, one end of which is electrically connected to the center tap of the primary coil, and the other end of which is electrically connected to the center tap of the secondary coil; a first grounding capacitor, one end of which is electrically connected to the center tap of the primary coil, and the other end of which is grounded; and a second grounding capacitor, one end of which is electrically connected to the center tap of the secondary coil, and the other end of which is grounded. The orthogonal signal generator provided in this application can achieve broadband performance through a single-stage structure.

Embodiments of the present application disclose radio frequency (RF) differential systems, RF amplifier systems, and methods of addressing common mode noise in RF differential circuits. The RF differential system includes an RF differential circuit and a winding connected to the RF differential circuit. The winding has a center tap. A biasing terminal is configured to receive a biasing signal. A suppression network is connected between the center tap and the biasing terminal.

The application provides a generator system based on a high-frequency isolation matrix converter and a regulation method, and relates to the field of power generation, power transformation or power distribution.The generator system based on the high-frequency isolation matrix converter comprises a permanent magnet synchronous generator, a high-frequency matrix converter, a center-tapped high-frequency matrix transformer and a full-bridge converter, an output port of the permanent magnet synchronous generator is connected with the high-frequency matrix converter in the next stage, three-phase input of the high-frequency matrix converter is connected with the permanent magnet synchronous generator, the most common voltage source type device on the market is used, the cost and reliability of the device are ensured, the existing device common drain or common source connection is not needed, the additional conduction resistance of the device series connection is reduced, a complex multi-step commutation method is not needed, the simplified commutation strategy can omit the additional controller cost, the commutation failure probability is reduced, and the reliability of the system is enhanced.