112 results about "Balanced circuit" patented technology

In an ACDC power supply, voltage balance of each DC bus is achieved when power is unbalanced without using an additional balancing circuit or a multi-winding commercial transformer. The ACDC power supply includes an AC-DC converter ACDC, a primary side DC capacitor C1, an isolated DC-DC converter DCDC, and a secondary side DC capacitor C2. Each phase has m cells (m: an integer of 2 or more). A DC bus V is connected in series or in parallel to a plurality of secondary side DC capacitors C2. dc21 , V dc22 Multiple DC buses V dc21 , V dc22 The voltage is supplied to the load or power source. When a power imbalance occurs due to the load or power source condition, the voltage is output while maintaining the voltage balance between the secondary DC voltage and the primary DC voltage of each cell.

A power converter system includes a DC voltage source, a control system, a multilevel inverter and a balancing circuit connected to the DC voltage source, and at least two DC link series connected capacitors connected between a positive and a negative voltage supply line (V+, V−) of the DC voltage source and having a mid-point therebetween. The balancing circuit comprises a plurality of switches that are connected in series between said positive and a negative voltage supply line (V+, V−), the plurality of switches arranged in a first pair of switches and a second pair of switches. A flying capacitor is connected between a mid point of the first pair of switches and a mid point of the second pair of switches, and an inductor is connected between said DC link capacitor mid point and a mid point between the first pair of switches and second pair of switches.

The embodiment of the invention discloses a cascode cascade device which is applied to the technical field of semiconductor manufacturing. In a cascode cascade device, a source electrode and a grid electrode of a low-voltage enhanced field effect transistor are respectively used as a source electrode end and a grid electrode end of the cascade device, and a drain electrode of a high-voltage enhanced field effect transistor is used as a drain electrode end of the cascade device, so that a balancing circuit and an adjusting circuit can be integrated on the low-voltage enhanced field effect transistor; and the balancing circuit and the adjusting circuit only relate to the resistor and the diode, and when the resistor and the diode are integrated on the low-voltage enhanced field effect transistor, only one mask needs to be added, so that the process cost is relatively low. And redundant devices do not need to be integrated on the high-voltage field-effect tube in the cascade device, so that the area of the high-voltage field-effect tube is saved, and the overall cost of the cascade device is relatively low.

The invention discloses an equalization circuit and a continuous time linear equalizer. The equalization circuit comprises an input stage circuit, a feedback control circuit, a source degeneration circuit and a load circuit, the input stage circuit is in coupling connection with the feedback control circuit, when an input signal of the signal input end is low-frequency, the feedback control circuit is cut off, and the signal is amplified by the first transistor; when the frequency of the received signal is increased, the feedback control circuit is switched on, and the signal is amplified by the first transistor and the second transistor; when the input signal is high frequency, the source degeneration circuit generates a source degeneration effect related to the frequency; the load circuit is composed of a feedback loop and used for decoupling load parasitism and input stage circuit parasitism. The amplifier is also used for receiving control voltage and providing gain for the equalization circuit; the control voltage is used to regulate the gain effect provided by the load circuit. According to the invention, a multi-segment equalization function of the equalizer can be realized, and the equalizer is suitable for attenuation of different channels and compensates for attenuation of signals by different attenuation mechanisms.

The invention provides a power converter and an energy storage system, and belongs to the technical field of power electronics. The power converter provided by the invention comprises an NPC three-level balance circuit, a current sampling circuit and a control circuit. Wherein the current sampling circuit can sample current which flows through the midpoint of a bus and flows through a clamping diode included in a first bridge arm in the NPC three-level balance circuit. The control circuit can determine that the clamping diode or the internal switching tube in the first bridge arm has a short-circuit fault if the current is detected to be large under the condition that the external switching tube in the first bridge arm is switched on or the internal switching tube in the first bridge arm is switched off. At the moment, the control circuit stops outputting the PWM signal to the NPC three-level balance circuit, so that each switching tube in the NPC three-level balance circuit is turned off, and the diffusion of the short-circuit fault can be avoided. Therefore, short-circuit protection of the NPC three-level balance circuit is realized, and fire caused by electric leakage of the NPC three-level balance circuit is avoided.

A high power (HP) generator (10) and a method for delivering pulsed high power at high voltage and / or current values ​​to a capacitive load, in particular a plasma process, comprising: - several low power (LP) generators (14, 16, 18), each including an energy storage component (C1, L1), wherein, during use, the energy storage component (C1, L1) is charged to a predetermined value associated with the energy storage component; Each provides, when in use, at its output an LP generator value that corresponds to the value of the energy storage components (C1, C2, Cn, L1, L2, Ln) incorporated in the respective LP generator (14, 16, 18) Several LP generators (14, 16, 18) and - a coupling (20), the LP generators (14, 16, 18) being electrically connected such that a coupling value at an output of the coupling (20) can be obtained which corresponds to an output value of the HP generator (10) and which is higher than the LP generator value at the output of one of the LP generators (14, 16, 18) during use, at least in some states of the HP generator (10); - a control unit (22) configured to select the contribution of the LP generators (14, 16, 18) to the output value of the HP generator (10) during the power delivery of the HP generator (10) in order to produce a rise and / or a decay of a pulse at the output of the coupling (20); Including, - A balancing circuit containing components that allow current to flow in only one direction, in particular a diode (D) or a component acting like a diode, is connected between the two LP generators (14, 16, 18).

The embodiment of the utility model discloses a cascode cascade device which is applied to the technical field of semiconductor manufacturing. In a cascode cascade device, a source electrode and a grid electrode of a low-voltage enhanced field effect transistor are respectively used as a source electrode end and a grid electrode end of the cascade device, and a drain electrode of a high-voltage enhanced field effect transistor is used as a drain electrode end of the cascade device, so that a balancing circuit and an adjusting circuit can be integrated on the low-voltage enhanced field effect transistor; and the balancing circuit and the adjusting circuit only relate to the resistor and the diode, and when the resistor and the diode are integrated on the low-voltage enhanced field effect transistor, only one mask needs to be added, so that the process cost is relatively low. And redundant devices do not need to be integrated on the high-voltage field-effect tube in the cascade device, so that the area of the high-voltage field-effect tube is saved, and the overall cost of the cascade device is relatively low.

The application describes a method for balancing voltages on a first and a second DC conductor in a DC grid using a balancing circuit with a first and second semiconductor switch connected in series between the first and second DC conductors, and a connection to a ground potential that is arranged between the first and second semiconductor switches. In the presence of an asymmetry in the voltages of the first and second DC conductors to ground potential, a compensation current is generated between at least one of the DC conductors ground potential via at least one of the semiconductor switches, with the asymmetry in the voltages being reduced by the compensation current (IA), with the voltages of the DC conductors to ground potential being balanced.

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 switching circuit includes a transmission gate, two base control sub-circuits each including a first transistor and a second transistor, a third transistor, and a fourth transistor. The transmission gate includes two I / O terminals, two gate control terminals, and two base control terminals, and is configured to conduct or not conduct the two I / O terminals according to the voltage of the two gate control terminals. The two base voltage control sub-circuits, the third transistor and the fourth transistor forms a double balance circuit structure and is electrically connected to the transmission gate. The double balance circuit changes the voltage of the base control terminals according to the voltage of the I / O terminals of the transmission gate.

Circuit embodiments for a switched-capacitor power converter, and / or methods of operation of such a converter, that robustly deal with various startup scenarios, are efficient and low cost, and have quick startup times to steady-state converter operation. Embodiments prevent full charge pump capacitor discharge during shutdown of a converter and / or rebalance charge pump capacitors during a startup period before switching operation by discharging and / or precharging the charge pump capacitors. Embodiments may include a dedicated rebalancer circuit that includes a voltage sensing circuit coupled to an output voltage of a converter, and a balance circuit configured to charge or discharge each charge pump capacitor towards a target steady-state multiple of the output voltage of the converter as a function of an output signal from the voltage sensing circuit indicative of the output voltage. Embodiments prevent or limit current in-rush to a converter during a startup state.

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.

An integrated circuit includes a sigma-delta modulator coupled to a receive electrode of a capacitive touch screen sensor and including a first single-ended integrator and a second single-ended integrator selectively coupled to an output of the first single-ended integrator. A latch is coupled to an output of the second single-ended integrator and driven by a frequency modulation signal. A balancing circuit is selectively coupled to a first input of the first single-ended integrator and to a second input of the second single-ended integrator. Logic is coupled to the balancing circuit and causes, based on the frequency modulation signal and an output value of the latch, the balancing circuit to one of: apply a positive balancing current to the first input and a negative balancing current to the second input; or apply a positive balancing current to the second input and a negative balancing current to the first input.

The utility model discloses a low-harmonic high-power-factor silicon controlled rectifier dimming and toning circuit, and relates to the technical field of circuits. Comprising a silicon controlled rectifier dimmer, the silicon controlled rectifier dimmer is connected with the L end of a power supply, the silicon controlled rectifier dimmer is also connected with an input anti-surge circuit through a protection circuit, the N end of the power supply is also connected with the input anti-surge circuit, the input anti-surge circuit is connected with a bridge rectifier circuit in parallel, and the positive electrode of the bridge rectifier circuit is connected with a constant current control circuit. The constant current control circuit is connected with the constant current reference sampling circuit, and the constant current reference sampling circuit is respectively connected with the first full balance circuit, the second control step-down power supply circuit, the second warm light LED lamp bead, the second cold light LED lamp bead, the second filter circuit and the second bleeder circuit. The dimming and color temperature adjusting device can be used for dimming and color temperature adjusting occasions of an alternating-current or direct-current silicon controlled rectifier dimmer and can also be used for dimming and color temperature adjusting occasions by adjusting input voltage through direct current.

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 invention relates to a power combiner (1) for coupling RF signals, in particular designed for a plasma processing supply system and a plasma processing system, the power combiner (1) being designed for a predefined operating frequency range with frequencies in the range of 2 MHz to 200 MHz, in particular in the range of 10 MHz to 50 MHz, the invention relates to a power combiner designed for output power > = 2 kW, preferably output power > = 4 kW, comprising: e) a plurality of inputs (In1 to In4) designed for connecting RF power amplifier stages (AS1 to AS4); f) a main output (OUT); g) a plurality of coupling elements, in particular in the form of inductors (L1 to L4), each coupling element connecting one input (In1 to In4) to the main output (OUT); h) a balancing circuit (B) connecting the inputs (In1 to In4) to each other, having: iii) an energy absorber, in particular in the form of resistors (R1 to R4), and a balancing line (W1 to W4), having a fixed characteristic impedance and a length of this,

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.

The present invention belongs to the field of electromagnetic compatibility, and relates to an anti-rebound interference power supply filter for suppressing the counter-interference generated by the current surge during the operation of electrical equipment with high-power IGBT elements as the core on the DC power bus. It is mainly used in the DC power supply system of Dongfeng diesel locomotives to suppress the counter-interference generated by the current surge during the operation of the air-conditioning inverter connected to the locomotive power bus on the bus, and improve the reliability and safety of other electrical equipment in the same power bus. The power supply filter includes: a group of π-type low-frequency filter circuits for suppressing electromagnetic interference of low-frequency components, a group of fourth-order Butterworth high-frequency filter circuits for suppressing electromagnetic interference of medium and high-frequency components, and a group of RDC damping absorption circuits with redundancy for suppressing high-amplitude DC current surges. The low-frequency filter circuit and high-frequency filter circuit of the present invention adopt a fully balanced circuit structure, so that the surge of counter-interference can be suppressed when it is connected to the bus from the positive terminal or the negative terminal.

The present invention discloses a high-performance charge pump for a phase-locked loop, belonging to the technical field of integrated circuits, and solving the technical problem that the charge pump in the charge pump type phase-locked loop in the prior art is difficult to achieve high current matching and low current noise output. The charge pump comprises: a charging circuit (10) for charging a charge pump output node; a discharging circuit (20) for discharging the charge pump output node; a charge-discharge voltage balancing circuit (30) for controlling the charging circuit and the discharging circuit during the process of charging and discharging the charge pump output node, so that the charge pump output node voltage is consistent with the reference node voltage, so as to eliminate the charge sharing effect; and a charge-discharge current matching circuit (40) for controlling the charging circuit and the discharging circuit during the process of charging and discharging the charge pump output node, so that the current matching degree between the charging circuit and the discharging circuit is maintained within a preset range, thereby reducing the PLL reference spurious.

The embodiment of the present invention discloses a common-source and common-gate cascade device, which is applied to the field of semiconductor manufacturing technology. In the common-source and common-gate cascade device, the source and gate of the low-voltage enhancement type field effect tube are used as the source terminal and gate terminal of the cascade device respectively, and the drain of the high-voltage enhancement type field effect tube is used as the drain terminal of the cascade device, so that the balancing circuit and the adjustment circuit can be integrated on the low-voltage enhancement type field effect tube, and the balancing circuit and the adjustment circuit only involve resistors and diodes. When integrating resistors and diodes on the low-voltage enhancement type field effect tube, only one mask plate needs to be added, and the process cost is relatively low. In the cascade device, no redundant devices need to be integrated on the high-voltage field effect tube, which saves the area of ​​the high-voltage field effect tube and makes the overall cost of the cascade device lower.

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.

This AC / DC power supply comprises an AC / DC converter ACDC, a primary side DC capacitor C1, an insulated DC / DC converter DCDC, and a secondary side DC capacitor C2. The AC / DC power supply has m (m: an integer of 2 or more) cells per phase. The AC / DC power supply has a plurality of DC buses Vdc21, Vdc22 in which the plurality of secondary side DC capacitors C2 are connected in series or in parallel. The AC / DC power supply supplies the voltages of the plurality of DC buses Vdc21, Vdc22 to a load or a power supply. The AC / DC power supply outputs, during power unbalance occurring due to the states of the load or the power supply, a voltage while maintaining the voltage balance of a secondary side DC voltage and the primary side DC voltage of each cell. The AC / DC power supply achieves the voltage balance of each DC bus during the power unbalance without using an additional balance circuit or a commercial transformer with multiple windings.

The present invention relates to a battery charging / discharging circuit system comprising: a battery pack; a switching MOSFET for switching the current of the battery pack; a battery management system (BMS) IC which controls discharging of the battery pack and protects the battery pack from overcharging and overdischarging; a passive balancing circuit which, when an imbalance in voltage between cells is detected by the BMS IC while the battery pack is being charged, activates a balance terminal to receive a control signal from the BMS IC and consumes the overcharge voltage of a corresponding battery cell exceeding a target voltage as heat energy; and an active balancing circuit which, when an imbalance in voltage between cells is detected by the BMS IC while the battery pack is not being charged, activates the balance terminal to receive a control signal from the BMS IC and supplies a current from a battery cell having a relatively high cell voltage to a battery cell having a relatively low cell voltage.

The present invention discloses a piezoelectric self-sensing passive vibration suppression control circuit and method based on switching stiffness, which includes a piezoelectric module, a bridge balance circuit, and a control circuit. The piezoelectric module comprises two piezoelectric units symmetrically arranged on both sides of the vibration suppression object, and each piezoelectric unit contains N piezoelectric bodies connected in parallel; the bridge balance circuit separates the electrical signals generated by the piezoelectric bodies into self-sensing signals for monitoring the electrical state and vibration state of the piezoelectric bodies and control signals for controlling the electrical boundary conditions of the piezoelectric bodies, and the control circuit is used to switch the system stiffness. The present invention achieves the vibration suppression effect by switching the equivalent system stiffness, which belongs to the passive vibration suppression method and does not require external energy input to the system. It has the advantages of environmental protection, convenience, wide application range, strong reliability, and real-time monitoring, and has good application prospects.

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.

An adaptive DC filtering circuit based on synchronous sampling and its DC filtering method, comprising an AC sampling circuit, a device power supply circuit, a DC reference circuit, a signal processing unit and a balancing circuit. The device power supply circuit is used to convert the power supply voltage into a DC voltage. The device power supply circuit is connected to the DC reference circuit and, through the balancing circuit, converts the DC voltage generated by the device power supply circuit into two identical DC reference voltages. One of the DC reference voltages is directly input into the signal processing unit, and the other DC reference voltage is superimposed on the voltage signal output by the AC sampling circuit as a DC bias signal and input into the signal processing unit. The signal processing unit synchronously samples the two input signals and performs a subtraction operation. The present invention realizes the real-time filtering function by using digital difference, has a short sampling period, is not easily affected by spectral leakage, has high precision and does not affect the processing of subsequent software algorithms.

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.