41 results about "Balanced circuit" patented technology

The invention relates to the technical field of power supplies, and discloses a bidirectional uninterruptible power supply system with a bus neutral-point balance circuit and a control method, the bidirectional uninterruptible power supply system comprises a static bypass unit, a power conversion unit and a controller, a first end of the static bypass unit is connected to an external power grid, and a second end is used as a power grid output end; the first end of the power conversion unit is connected with the energy storage device, the second end of the power conversion unit is connected with the power grid output end of the static bypass unit to form an alternating-current connecting end connected with a load, the power conversion unit comprises a three-level bidirectional DC / AC module, a direct-current bus and a bus neutral-point balance circuit, and the bus neutral-point balance circuit is coupled with the direct-current bus. The direct-current bus comprises a first capacitor and a second capacitor; the controller is configured to control the operation logic of the bus neutral-point balancing circuit according to the voltage difference between the first capacitor and the second capacitor so as to clamp the neutral-point potential of the DC bus. The architecture topology is simple, and the operation stability and the power supply reliability under multiple working conditions are improved.

A method for operating a power converter and a power converter are disclosed. The method includes regulating a common mode voltage at an output node of the power converter. The power converter includes: a first input node receiving a first input voltage; a second input node receiving a second input voltage; a first intermediate capacitor connected between the first intermediate node and the midpoint; a second intermediate capacitor connected between the midpoint and the second intermediate node; a first output capacitor connected between the first output node and the midpoint; a second output capacitor connected between the midpoint and a second output node; an input converter coupled to a first input node, providing an intermediate voltage between a first intermediate node and a second intermediate node; a first output converter coupled between the first intermediate capacitor and the first output capacitor; a second output capacitor coupled between the second intermediate capacitor and the second output capacitor; and a balancing circuit coupled to the first intermediate capacitor and the second intermediate capacitor.

A module antenna for use with a battery cell in a battery pack is provided. The module antenna enabling wireless communication between an electronic device coupled to the battery cell and a bus antenna. The module antenna comprises: a transmission line operatively coupled to the electronic device at one end and to at least one antenna at its other end, the at least one antenna enabling electro-magnetic coupling with the bus antenna, the at least one antenna having a plurality of sections arranged in series forming an unbalanced electrical path and being coupled to a termination resistor at its distal end. The module antenna further comprises at least one capacitive element located between the transmission line and the termination resistor, the capacitive element and the at least one antenna having a resonant frequency matched to an operating frequency of a desired transmission signal.

The application relates to a linear thyristor light-adjusting full-voltage constant-power input circuit, wherein a thyristor light adjuster is arranged in communication with an external voltage in front of an input protection circuit, a bridge rectifier circuit is arranged at the rear end of the input protection circuit, an output end of the input protection circuit is connected with a voltage conversion detection circuit, the voltage conversion detection circuit is connected with a full-voltage control circuit, a power supply resistor R11 is connected with the output end of the bridge rectifier circuit, the power supply resistor R11 is connected with the full-voltage control circuit, a series-parallel conversion circuit is connected with the full-voltage control circuit, and an isolation circuit is connected with the series-parallel conversion circuit, wherein four groups of full-balance circuits, reference position circuits, lamp string circuits and filter circuits are arranged respectively, the full-balance circuits, the reference position circuits and the lamp string circuits are connected correspondingly, the filter circuits are connected in parallel at both ends of the lamp string circuit, and the isolation circuit is connected between the full-balance circuit and the reference position circuit. The input circuit can realize full-voltage constant-power input, has strong universality and low cost.

The utility model discloses a red lamp pearl voltage drop balance circuit, including commercial power input circuit and transformer circuit, the output of transformer circuit is connected with constant voltage constant current circuit, and the output of constant voltage constant current circuit is parallel with red light lamp pearl control circuit, white light lamp pearl, green light lamp pearl and blue light lamp pearl, still be provided with control drive circuit, control drive circuit is connected with red light lamp pearl control circuit, white light lamp pearl, green light lamp pearl and blue light lamp pearl respectively. The utility model discloses the structure is reasonably set, reduced the use of resistance, is favorable to reduce cost, reduces the waste of power supply, is provided with red light lamp pearl control circuit, and it only needs to separately carry out DC-DC constant current control to red light lamp pearl, can separately adjust and control the forward voltage drop of red light lamp pearl, does not need extra resistance series connection again, can guarantee the illumination of red light lamp pearl under the condition of lower input power, improves the utilization of power supply, can reduce the volume of lamp body.

An isolated converter with magnetic bias balance control includes an isolated converter, a controller, and a magnetic bias balance circuit. The isolated converter includes a transformer, and the primary side of the transformer includes a primary winding and at least one switching arm. The controller is coupled to at least one switching arm and provides a pulse width modulation (PWM) signal group to control the at least one switching arm. The magnetic bias balance circuit is coupled to both ends of the primary winding and the controller, and provides a compensation voltage to the controller based on the average voltage across the primary winding. The controller adjusts the duty cycle of the PWM signal group according to the compensation voltage to correct the magnetic bias.

The utility model provides a real-time parallel self-adaptive lithium battery pack device, which comprises a plurality of lithium battery packs connected in parallel, each lithium battery pack comprises a main circuit and a control circuit, and the main circuit comprises a lithium battery, a secondary protection circuit, a main switch circuit, a balance circuit and an auxiliary power supply. The lithium battery is connected with the battery output terminal after sequentially passing through the secondary protection circuit, the main switch circuit and the balance circuit, the control circuit comprises an MCU and an isolation communication circuit, and the MCU is connected with isolation communication circuits of other lithium battery packs through the isolation communication circuit and feeds back a driving signal to the main switch circuit. And the auxiliary power supply takes electricity from the lithium battery and supplies power to the MCU and the isolation communication circuit. In conclusion, according to the real-time parallel self-adaptive lithium battery pack device provided by the utility model, not only is the intelligent level of parallel use of the battery packs improved, but also the safety, the reliability and the user friendliness of the system are remarkably enhanced.

The invention discloses a neutral-point balancing circuit, a control method, a power converter, photovoltaic equipment and an electric appliance. The neutral-point balancing circuit comprises a first switch of which the first end is connected with the first end of the output side of a rectifying circuit of the power converter; the first end of the first resistor is connected with the second end of the first switch, and the second end of the first resistor is connected with the first end of an upper bridge arm capacitor of the direct-current bus; the first end of the second switch is connected between the first switch and the first resistor, and the second end of the second switch is connected with the second end of the upper bridge arm capacitor; the first end of the second resistor is connected with the first end of the lower bridge arm capacitor of the direct current bus, and the second end is connected with the second end of the lower bridge arm capacitor. According to the invention, the function multiplexing of the resistor can be realized, that is, the dual functions of limiting the charging current and balancing the neutral-point voltage are realized through the same resistor, the number of the resistors is reduced, and the cost is reduced and the energy is saved.

An electronic device includes a plurality of batteries, a plurality of first switches (each of the first switches connected in series with a respective one of the batteries), balancing circuits, each of the balancing circuits associated with the respective one of the batteries, and one or more processors configured to control the first switches and the balancing circuits. Each of the balancing circuits includes a second switch and a transformer corresponding to the second switch, and the transformer includes a first coil and a second coil. The transformer is configured to operate in a first state in which a current is induced from the first coil to the second coil or a second state in which the first coil is short circuited, based on a signal transmitted to the second switch.

This application discloses an RF voltage balancing circuit, a filter, a chuck, and a semiconductor device. The RF voltage balancing circuit is used in a semiconductor device including a power supply and powered components. The powered components include a chuck, an upper electrode, an edge ring, and / or a temperature control link. The RF voltage balancing circuit includes at least two power supply loops and at least one filter circuit. Each power supply loop includes two power supply links. Each power supply link connects a powered component to the power supply, so that the power supply supplies power to the powered component via the power supply loop. The powered component is coupled with an RF signal. Each filter circuit allows the RF signal to pass through while blocking the power supply current, which is the current supplied by the power supply to the powered component via the power supply link. At least two of the at least two power supply loops satisfy the condition that at least one filter circuit is connected between the two power supply loops. This application can reduce RF losses and improve the efficiency and quality of semiconductor processes.

The utility model provides an amplifier with temperature compensation, and the amplifier comprises an amplifier which is provided with a signal input end and a signal output end; the resistance variable circuit is connected between the signal input end and the signal output end and is used for adjusting the resistance of the resistance variable circuit based on a control signal so as to adjust the output impedance of the amplifier; and the control signal generation circuit is used for generating the control signal changing along with the temperature and outputting the control signal to the resistance variable circuit. The utility model further relates to a balanced circuit structure for the amplifier.

The application provides a power electronic converter, a resonant balancing circuit and a control method thereof. The resonant balancing circuit is provided with a resonant component between the midpoints of the switching tubes connected to each half bus capacitor. By controlling the on-off of each switching tube, the resonant component can transfer energy to the two half bus capacitors, so as to realize voltage balance between the two half bus capacitors. Moreover, each switching tube is set to switch the on-off state when the resonant current of the resonant component is zero, so as to realize soft switching control of each switching tube and reduce the loss. In addition, only four power devices, i.e. the first to fourth switching tubes, are needed in the resonant balancing circuit, so as to avoid the problem of high cost caused by too many power devices.

Drive signals for switching stages of a multiphase electronic converter are generated as a function of a PWM signal and a current balancing circuit. The current balancing circuit receives a control clock signal and a reference clock signal from a phase shift circuit. A phase detector generates the PWM signal as a function of the control clock signal received via one or more delay lines and the reference clock signal. Specifically, a regulator circuit of the current balancing circuit varies the delay introduced by the one or more delay lines in order to balance the currents provided by the switching stages of the multiphase electronic converter.

The invention relates to a method and a balancing circuit (10) for balancing an ungrounded DC power supply system (2). A detector circuit (12) detects a faulty live conductor (L-) in which a maximum leakage current to earth (PE) flows due to a minimal insulation resistance (Rf-). The faulty live conductor (L-) is coupled to the balancing circuit (10) by means of a switching device (14), whereby the maximum leakage current is compensated by a control device (16) of the balancing circuit (10) without reducing the insulation resistance (Rf+) of the other live conductor (L+). Furthermore, the invention relates to an extended insulation monitoring device (30) for monitoring an ungrounded DC power supply system with a balancing circuit (10) according to the invention.

The present application provides a power converter and a power supply system. By changing boost converter circuits to a parallel connection relationship, when direct current sources operate normally, the energy difference between positive and negative buses can be greatly reduced and even the voltages of the positive and negative buses can be balanced, so that a balancing circuit does not need to operate, the power of the balancing circuit can be greatly reduced, and the balancing energy required by the balancing circuit is greatly reduced or even eliminated, thereby enabling lightweight design of the balancing circuit, reducing the number of power semiconductor devices used, effectively lowering costs, and solving the problem of difficulty in circuit layout.

A voltage balancing circuit for capacitor banks or voltage cells connected in series. The circuit includes a DC-link with at least two capacitors or voltage cells connected in series and at least two emitter follower balancing circuits connected in parallel. At least one emitter resistor is provided between the emitter of each emitter follower balancing circuit and the mid-point of the DC-link. The gate emitter voltage applied to each emitter follower balancing circuit may be equal to its common gate voltage minus the voltage drop on the corresponding emitter resistor. The invention is also directed at a variable frequency drive for driving an electric motor or a power converter, having a corresponding voltage balancing circuit.

A dual-phase buck-converter including a DC resistance detection circuit that detects first and second DC resistances of respective first and second inductors that transmit master and slave currents to a load, and generates first and second reference voltages indicative of the first and second DC resistances; a current sensor that detects a master average current flowing through the first inductor, and a slave average current flowing through the second inductor; a current balance circuit that generates a master on-time control voltage and a slave on-time control voltage for controlling matching of the master and slave average currents, based on the first and second reference voltages; an on-time controller that generates a master duty signal and a slave duty signal based on the master on-time control voltage and the slave on-time control voltage; and a buck-converter that supplies the master and slave currents based on the master and slave duty signals.

The ACDC power supply has an AC-DC converter ACDC, a primary-side DC capacitor C1, an insulation type DC-DC converter DCDC, and a secondary-side DC capacitor C2. Each 1 phase has m (m: an integer of 2 or more) units. A plurality of DC buses V dc21 and V dc22 are connected in series or in parallel with a plurality of secondary-side DC capacitors C2. The voltage of the plurality of DC buses V dc21 and V dc22 is supplied to a load or a power supply. When power imbalance occurs due to the condition of the load or the power supply, the output voltage is maintained while maintaining the voltage balance of the secondary-side DC voltage and the primary-side DC voltage of each unit. In the ACDC power supply, the voltage balance of each DC bus is achieved when power imbalance occurs without using an additional balancing circuit or a multi-winding power frequency transformer.

The invention discloses an FBAR filter balanced circuit and a radio frequency filter, and belongs to the technical field of filters. The balanced circuit comprises a filtering module, a bandwidth expansion module and a stop-band optimization module, the filtering module comprises two resonators and generates two initial resonance modes at different positions, and the initial resonance modes are coupled to form an initial passband; the two bandwidth expansion modules are respectively connected with the two input ends and the two output ends of the filtering module in a one-to-one correspondence manner; the bandwidth expansion module interacts with the filtering module to generate two new resonance modes at the frequency lower than the initial passband frequency, and the new resonance modes and the initial resonance mode are coupled to expand the initial passband width; the two stop-band optimization modules are respectively connected in parallel with the two bandwidth expansion modules, transmission zero points are introduced at different stop-band frequencies, a stop-band filtering structure is constructed, the out-of-band rejection capability and the rectangularity of the filter are improved, and broadband and high-selectivity collaborative optimization of the FBAR balanced circuit structure is realized.

To provide a balanced band-pass filter capable of suppressing common mode passage in a wide band by using a coupling resonator and a ring resonator in combination.SOLUTION: A balanced band-pass filter having a balanced circuit configuration for differentially transmitting a transmission signal, the balanced band-pass filter having a balanced circuit configuration for differentially transmitting seven pairs of transmission signals in which coupled lines are symmetrically arranged, each of the coupled lines being formed by electromagnetically coupling two λ / 4 lines having a line length of 1 / 4 of a wave length λ at a f0 frequency center of the transmission signal, the filter structure is loaded with a both-end-open-type resonator and ring resonators 2 and 4 and a coupled-line resonator 3, the both-end-open-type resonator and ring resonators 2 and 4 being composed of a plurality of pairs (here, seven pairs) of coupled lines f0 and 1B, 2A and 2B,., 7A and 7B obtained by electromagnetically coupling two λ / 4 lines each having a line length of 1 / 4 of a wave length λ of a center frequency 1A of a transmission signal.SELECTED DRAWING: Figure 1

A multi-phase circuit includes a plurality of phases respectively corresponding to a plurality of clock phases. To balance respective output currents from the phases, for each phase: in response to an occurrence of a sampling time of that phase, a measurement signal corresponding to a value at the sampling time of the current for that phase is produced using a sampling circuit and provided to the other phases, other measurement signals from the other phases are received, an indicator signal according to whether the measurement signal is greater than an average of the other measurement signals is produced using a comparator circuit, and the output current of the phase is adjusted according to the indicator signal. The plurality of phases may include three or more phases.

An inverter and an inverter control method. The inverter includes an inverter system and a controller. The inverter system includes an inverter circuit, positive and negative direct current buses, a bus capacitor, and a balancing circuit. The inverter is configured to: when a user connects to an unbalanced load, control the balancing circuit based on different magnitudes of voltage fluctuation generated by the unbalanced load for the bus capacitor, to implement a function of jointly sharing current fluctuation by the bus capacitor and the balancing circuit, and reduce design costs of the bus capacitor and the balancing circuit.

A gate driving circuit and a display device. The gate driving circuit is provided with cascaded shift register units, and each shift register unit comprises fourteen transistors (M1, M2, M3, M4, M5, M6, M7, M8, M9, M10, M11, M12, M13, M14), three capacitors (C1, C2, C3), a signal input terminal (Input), a signal output terminal (EOUT), and two timing control terminals (CLK1, CLK2). In the gate driving circuit, by precisely controlling a voltage relationship and a control signal in the circuit, the stability and response speed of the gate driving circuit are improved, the function of the gate driving circuit is realized, and the smoothness of circuit output and the occupation of layout space are balanced.

A balancing circuit according to an embodiment of the present invention comprises: a second resistor connected to the same node as that of a first resistor of a voltage sensing unit connected to a first terminal of an output end of a power conversion device; and a fourth resistor connected to the same node as that of a third resistor of the voltage sensing unit connected to a second terminal of the output end of the power conversion device, wherein the second resistor and the fourth resistor are connected to an upper switch of the power conversion device.

The present application relates to the technical field of power electronics, and provides a power converter and an energy storage system. In the power converter provided by the present application, a current sampling circuit can sample current which flows through the neutral point of a bus and flows through a clamping diode comprised in a first bridge arm in an NPC three-level balancing circuit. When an external switch transistor in the first bridge arm is turned on, or when an internal switch transistor in the first bridge arm is turned off, if it is detected that the current is large, a control circuit determines that a short-circuit fault has occurred in the clamping diode or internal switch transistor in the first bridge arm. In this case, the control circuit stops outputting a PWM signal to the NPC three-level balancing circuit, such that each switch transistor in the NPC three-level balancing circuit is turned off, thereby avoiding the spreading of the short-circuit fault. Therefore, short-circuit protection for the NPC three-level balancing circuit is achieved, thereby preventing a fire caused by current leakage in the NPC three-level balancing circuit.

A method and a balancing circuit (10) for balancing an ungrounded direct-voltage power supply system (2) are disclosed. In a detector circuit (12), a faulty active conductor (L-) is detected in which a largest leakage current to ground (PE) flows because of a lowest insulation resistance (Rf-). The faulty active conductor (L-) is coupled to the balancing circuit (10) by means of a switching device (14), the largest leakage current being compensated by means of an open-loop and closed-loop control device (16) of the balancing circuit (10) without reducing the insulation resistance (Rf+) of the other active conductor (L+). Furthermore, an enhanced insulation monitoring device (30) is provided for monitoring an ungrounded direct-voltage power supply system having a balancing circuit (10).

A kind of zeroing circuit and current sensor based on Hall element, the present application belongs to electromagnetic induction technical field, by Hall element, detect external current induction magnetic field, and generate Hall voltage signal;Feedback coil, be located at the first end of C-shaped magnetic ring;Magnetic balance coil, be located at the second end of C-shaped magnetic ring, wherein, magnetic balance coil is oppositely arranged with feedback coil;Conditioning circuit, compare and amplify processing generation first current signal with Hall voltage signal;Wherein, first current signal flows through feedback coil, to form first electromagnetic field;Electromagnetic balance circuit, according to the voltage signal provided by conditioning circuit, adjust the current flowing in magnetic balance coil, to make the magnetic motive force generated by feedback coil equal to the magnetic motive force generated by magnetic balance coil;Wherein, the direction of the induced magnetic field generated by feedback coil and the direction of the induced magnetic field generated by magnetic balance coil are opposite;Improve the linearity of current, realize isolated sensing and high-precision sensing.

A front-end configuration of a transceiver combines two sets of Power Amplifiers (PA) (each set comprising, e.g., one differential PA or two single-ended PAs in anti-phase) and two Quadrature Hybrid Couplers (QHC) as a balanced PA circuit that is robust to load modulation. A Low Noise Amplifier (LNA) is connected, and protected from direct and reflected TX signals, such that a TX / RX antenna switch is not needed. The ISO ports of the two QHCs are connected to a symmetrical passive 3-port network connected to the LNA input. In TX-mode, inputs of the 3-port network are excited differentially, and the network terminates any TX signal reflected from the antenna in a resistive load, while presenting a virtual ground at its input. In Rx mode, the output impedances of the sets of PAs are reconfigured to make the received signal appear at the inputs of the 3-port network in common-mode.

The invention discloses a communication and sensing integrated self-adaptive load modulation balanced power amplifier and an implementation method of the communication and sensing integrated self-adaptive load modulation balanced power amplifier. The power amplifier comprises a driving stage power amplifier module, a self-adaptive power distribution module integrated with a diode and a matching circuit, a control circuit module, a balance circuit module and a phase deviation module. Through the nonlinear characteristic of a diode in the adaptive power distribution module, the high efficiency of the load modulation balanced power amplifier is maintained at a backoff point, the power distributed to a control circuit power amplifier is reduced after the backoff point, the supersaturation effect of the control circuit is relieved, the high efficiency is stably maintained, and more power is distributed to the balanced circuit power amplifier. Therefore, the saturation speed of the balance path power amplifier is accelerated. The self-adaptive power distribution module is adopted, and a reconfigurable circuit topological structure is not included, so that high power rollback efficiency is obtained in a communication scene, higher saturation output performance is obtained in a sensing and wireless power transmission scene, and high performance is achieved in a communication-sensing-transmission integrated scene.