57 results about "Diode bridge" patented technology

This disclosure presents an embodiment of a power supply device for a submarine data center. One specific embodiment of the power supply device includes a pre-stage voltage regulator / conversion component, a post-stage DC-DC converter component, and a combined protection circuit. The pre-stage voltage regulator / conversion component includes several parallel single-group voltage regulator branches, each branch connected in series with a varistor and a color-coded resistor. A thin-film capacitor is connected in parallel to the output terminal of the pre-stage voltage regulator / conversion component. The post-stage DC-DC converter component, electrically connected to the pre-stage voltage regulator / conversion component, includes at least two sets of full-bridge DC synchronous rectifier circuits. The combined protection circuit includes a pre-stage combined protection circuit, a post-stage active voltage clamping circuit connected in parallel to the output side of the post-stage DC-DC converter component, and a rectifier diode bridge connected between the constant current input port and the pre-stage voltage regulator / conversion component. The pre-stage combined protection circuit is connected in series to the input side of the rectifier diode bridge. By connecting multiple voltage regulator branches in parallel and combining them with the combined protection circuit, ripple is reduced. This embodiment can improve the power supply stability of the power supply device.

The invention provides an active static var generator in an interleaved parallel form, and relates to the technical field of integrated circuits, and the active static var generator comprises a first three-level topology module which comprises a first three-level topology circuit and a second three-level topology circuit which are connected in parallel between a bus positive electrode and a bus negative electrode, the midpoint of a first switching tube bridge arm of the first three-level topological circuit is coupled with the second end of the first inductor, and the midpoint of a second switching tube bridge arm of the second three-level topological circuit is coupled with the second end of the second inductor. The midpoint of a first diode bridge arm of the first three-level topological circuit and the midpoint of a second diode bridge arm of the second three-level topological circuit are both coupled with the null line connecting end, and the first capacitor is coupled between the first live line connecting end and the second end coupled with the null line connecting end. The first end of the first inductor and the first end of the second inductor are both coupled with the first live wire connecting end, and the problem that the performance is poor in the scene of ultrahigh frequency response, extreme ripple suppression or multi-module flexible expansion is solved.

An electric motor drive device includes: a three-phase diode bridge which rectifies and converts a three-phase AC voltage into a DC voltage; an electrolytic capacitor which smooths a DC voltage; a DC reactor provided between the three-phase diode bridge and the electrolytic capacitor; an inverter which converts a DC voltage smoothed by the electrolytic capacitor into an AC voltage and outputs the AC voltage to a motor; a voltage detecting unit which detects a DC voltage output from the three-phase diode bridge; and an inverter control unit which detects an imbalanced state of the three-phase AC voltage on the basis of a DC voltage value which is a detection value of the DC voltage obtained by the voltage detecting unit, and controls the inverter on the basis of a detection result of the imbalanced state.

The application discloses a current detection circuit, an alternating current load device control system and a detection system. The circuit comprises a first optoelectronic coupler, a diode bridge circuit and a diode series circuit. The first port of the first optoelectronic coupler is connected with the first port of the diode series circuit, and the second port of the first optoelectronic coupler is connected with the second port of the diode series circuit. The first port of the diode bridge circuit is connected with the first port of the diode series circuit, and the second port of the diode bridge circuit is connected with the second port of the diode series circuit. The diode bridge circuit is used for realizing bidirectional flow of alternating current. The diode series circuit is used for collecting the voltage of a device to be detected. The application solves the technical problem that the load working state is only judged by detecting the output end voltage in the prior art, and thus the detection is inaccurate.

The invention provides a diode high-voltage direct-current line offshore wind power transmission system, and belongs to the technical field of power transmission and distribution of power systems, and the system comprises a wind power generation module which comprises a direct-drive permanent magnet synchronous generator, a generator-side converter and a power grid-side converter; the high-voltage direct-current power transmission module comprises a rectifier and an inverter, the rectifier of the high-voltage direct-current power transmission module is a diode bridge, and the inverter is a modular multilevel converter; a generator side converter of the wind power generation module is used for stabilizing DC voltage, and a power grid side converter is used for controlling offshore AC voltage and frequency; the generator side converter adopts a double closed-loop vector control strategy; the power grid side converter adopts an internal control strategy; the inverter adopts a control strategy of an internal control loop and an external control loop. The wind power plant high-voltage direct-current power transmission system can realize maximum power point tracking.

Reliable device for automatically switching off a cooking appliance when the user is absent from the cooking area for an extended period of time, characterized in that it comprises: 3 ultrasonic sensors (CM), 1 gas flow detector (DG), 1 gas solenoid valve (VE), 1 buzzer (Bz), 1 power relay (19), 5 switching relays (29, 39, 60, 49, 59), 1 microcontroller (6), 1 current transformer (18), 1 diode bridge (16), 1 voltage transformer (17), 1 battery charging circuit (27), 1 12V battery (20), resistors and 2 capacitors (C21, C22), 2 changeover switches (C1, C2), 1 push button (S1) and transistors, etc.). The aforementioned elements work together to automatically shut off the gas supply between the household gas connection (gas cylinder) and the gas oven, and between the 220V mains supply and the electric hob, when the user is absent from the cooking area or in front of their cooking appliance for an extended period of time.

A drive circuit 100 comprises: an oscillation circuit 20 that is connected to a first and a second input terminal 11, 12 into which an input signal is input, and that outputs, in response to the input signal, a first and a second signal which have opposite phases from one another; and an isolated drive circuit 40 that is electrically connected to the oscillation circuit 20. The isolated drive circuit 40 includes a first input end 41 into which the first signal is input, a second input end 42 into which the second signal is input, an isolated circuit 44 which has a first and a second capacitor C1, C2, a diode bridge DB which rectifies a signal input thereto by the isolated circuit 44, a control circuit 44 which is connected to the diode bridge DB, and a first and a second output end 45, 46 which are each connected to the control circuit 44.

An electrical circuit (10, 40) comprising: a direct current power supply (12); an electrical load (14); and an insulation fault detection device (15, 41), arranged in parallel with the load (14), comprising: a voltage divider bridge; a diode bridge (23); and a comparator (34) comparing an output voltage of the diode bridge and a reference voltage (Vcons).

A system is provided that includes a diode bridge for rectifying an AC input voltage. A main switching power converter converts a rectified input voltage of the diode bridge to an output voltage. The flyback converter is coupled to the pre-bridge node or the post-bridge node to receive an input voltage that is converted to a supply voltage for the controller integrated circuit. The controller integrated circuit regulates both the output voltage and the supply voltage.

Electrical circuit (10, 40) comprising: a DC power supply (12); an electrical load (14); and an insulation fault detection device (15, 41), arranged in parallel with the load (14), comprising: a voltage divider; a diode bridge (23); and a comparator (34) comparing a voltage at the output of the diode bridge and a setpoint voltage (Vcons). Figure 1

A motor driver device (100) comprises a first diode bridge (10); a first capacitor (3); an inverter (30) which drives a motor (2); a first relay (40) which switches a connection between the first diode bridge (10) and the inverter (30) and a single-phase AC power source (1); an inrush current limiting thermistor (60) which allows an inrush current flow when power is switched on; a second relay (50) which switches a connection between the inrush current limiting thermistor (60) and the single-phase AC power source (1); a second diode bridge (20); a control microcomputer (5); a switching power supply circuit (4) which supplies power to the control microcomputer (5) based on the power supplied by the second diode bridge (20); and a driver-specific microcomputer (7) for the inverter.A half-wave rectifier circuit is configured using diodes contained in the second diode bridge, and a circuit which prevents reverse current flow is configured using other diodes of the second diode bridge.

An ideal diode bridge controller is provided that includes gate drivers to connect to transistors of a bridge rectifier in which the transistors are arranged as high-side transistors and low-side transistors. The gate drivers alternately switch the transistors to cause the bridge rectifier to convert an input voltage of either of two polarities to an output voltage of one of the two polarities. The gate drivers include low-side gate drivers for the low-side transistors, and respective ones of the low-side gate drivers include linear drive circuitry and digital drive circuitry. The linear drive circuitry drives a respective low-side transistor to switch on and off based on forward current through the respective low-side transistor. The digital drive circuitry detects a reverse current through the respective low-side transistor, and causes the respective low-side transistor to switch off in response to the reverse current.

A method to connect a direct current power (DC) source to a universal alternating current (AC) load can include an energy storage device configured to output a fixed voltage in a range of 84-135 volts (for 120 volt based systems) or 180-264 volts (for a 230 volt based systems). The universal AC load has input comprising a diode bridge followed by a storage capacitor. The unregulated DC source can be connected to the universal AC load by a switch that is turned on (closed) and off (open) with a low-frequency signal (e.g., 90 and 135 Hz) and a duty cycle between 80% and 98%. A sensor and inductor can be added to protect from excessive currents.

An isolated SEPIC converter is provided with a power factor correction inductor coupled between an output node of a diode bridge and a terminal of a power switch transistor. When the power switch transistor is cycled off, the power factor correction inductor conducts a demagnetization current through a primary winding of a transformer to charge a bulk capacitor.

A method to connect a direct current power (DC) source to a universal alternating current (AC) load can include an energy storage device configured to output a fixed voltage in a range of 84-135 volts (for 120 volt based systems) or 180-264 volts (for a 230 volt based systems). The universal AC load has input comprising a diode bridge followed by a storage capacitor. The unregulated DC source can be connected to the universal AC load by a switch that is turned on (closed) and off (open) with a low-frequency signal (e.g., 90 and 135 Hz) and a duty cycle between 80% and 98%. A sensor and inductor can be added to protect from excessive currents.

An isolated SEPIC converter is provided with a power factor correction inductor that couples between an output node from a diode bridge and a terminal of a power switch transistor. When the power switch transistor cycles off, the power factor correction inductor conducts a demagnetizing current through a primary winding of a transformer to charge a bulk capacitor.

The invention provides a controllable oscillation zero-crossing commutation integrated DC circuit breaker and a control method thereof, and relates to the technical field of power electronics. The DC circuit breaker comprises a through-flow branch, a transfer branch and an energy consumption branch. An ultra-fast mechanical switch is mounted on the through-flow branch; the transfer branch is composed of a commutation switch and a high-voltage semiconductor switch, the commutation switch is composed of a plurality of full-bridge sub-modules, and the high-voltage semiconductor switch is composed of a plurality of diode bridge modules. The invention further provides a control method of the direct-current circuit breaker. The direct-current circuit breaker is controlled under the two conditions that the direct-current line where the circuit breaker is located operates normally or before the fault of the direct-current line where the circuit breaker is located is detected and after the fault of the direct-current line where the circuit breaker is located is detected. In conclusion, the problems that in the prior art, a forced zero-crossing type circuit breaker is large in on-state loss and poor in economical efficiency, and a resonance zero-crossing type circuit breaker is low in zero-crossing speed and unreliable in fault clearing are effectively solved.

This invention provides a motor with improved power supply efficiency for motor driving, which actively generates photon electromotive force and inputs this electrical energy into the motor. [Solution] The system consists of a battery 1, a switching element 2, a diode bridge 4, wiring A connecting these in a loop, a high-frequency generator 3 that turns the switching element ON / OFF at a high frequency of 20kHz or higher, wiring B that carries the DC current converted by the diode bridge, and a DC motor 11 powered by this wiring B. Since there is a small capacitor between the two terminals of the switching element, a photon electromotive force is generated by changing the voltage across both ends at a high frequency, and the current generated by this electromotive force is converted to DC by the diode bridge and input to the DC motor, significantly improving the motor output (motor efficiency) relative to the battery power consumption.

The application discloses a direct-current alternating-current converter, a control method and device of the direct-current alternating-current converter. It relates to the technical field of power electronic devices, and the method comprises the following steps: controlling the on-off state of a switching device in a double-switch double-diode bridge circuit, so as to control the dynamic fluctuation of an inductor current along a first current curve and a second current curve, wherein the inductor current is the current flowing through a first inductor and a second inductor, and the first current curve is higher than the second current curve; and controlling the on-off state of a switching device in a four-switch four-diode bridge circuit, so as to control the dynamic fluctuation of an output voltage along a first voltage curve and a second voltage curve, wherein the output voltage is the voltage of alternating current output by the four-switch four-diode bridge circuit, and the first voltage curve is higher than the second voltage curve, thereby solving the problem that the current direct-current alternating-current converter cannot meet the requirement of high dynamic and high bandwidth for power supply of a hybrid power amplifier.

The air conditioner (1) has an outdoor unit (2), which includes a three-phase AC power supply (21), a compressor (29) for compressing refrigerant, and an inverter circuit (30) for controlling the compressor (29). The outdoor unit (2) has a drive microcomputer (31) for driving the inverter circuit (30), a second diode bridge (34) connected to the inverter circuit (30), a first relay (36) configured on a first wiring (22), a second relay (37) configured on a third wiring (24), a surge resistor (38), and a third relay (39) connected to the first wiring (22) and the surge resistor (38). After the compressor (29) stops, the drive microcomputer (31) disconnects the first relay (36), the second relay (37), and the third relay (39).

The invention relates to a natural commutation type hybrid DC circuit breaker control and protection device and method, a main branch in a topological structure is provided with a rapid mechanical switch, and a transfer branch is a power electronic valve group of a diode bridge type multi-parallel structure and is used for realizing rapid current transfer when a fault occurs; the energy consumption branch is provided with a metal oxide lightning arrester and is used for dissipating fault energy; the control protection device is provided with an input control interface, an output control interface and a core processing unit; the input control interface comprises an opening input node, a closing input node and a locking input node, and is used for receiving opening, closing and locking instructions. According to the device and the method, based on mechanical and solid-state circuit breaking technologies, large-current and low-loss through-flow operation of the circuit breaker is realized through a mechanical switch, high-response and rapid arc-free breaking of the circuit breaker is realized through a solid-state switch, and the purpose of rapid breaking of large-capacity short-circuit current is realized through sequential response control of each component through a control and protection strategy; and the overall performance and reliability of the ship power system are improved.

The present disclosure aims to suppress heat generation of a single-phase diode bridge itself and a pattern directly below the same in a case where the single-phase diode bridge is used instead of a three-phase inverter mounted on a three-phase four-wire 400V air conditioner. A power generation device (100) includes a first inverter (20A) and a second inverter (20B) mounted on a printed wiring board (10). The first inverter (20A) includes a first diode bridge (21Aa) and a second diode bridge (21Ab) that convert alternating-current power into direct-current power, the first diode bridge (21Aa) being connected between a first wiring (11) connected to an R phase and a second wiring (12) connected to an S phase, and the second diode bridge (21Ab) being connected between the second wiring (12) and a third wiring (13) connected to a T phase. The second inverter (20B) includes a third diode bridge (21B) connected between a fourth wiring (14) connected to an N phase and a fifth wiring (15) branched from the first wiring (11) that converts alternating-current power into direct-current power.

A power inverter topology for converting a DC input to one or more phases of AC output, and methods for operating the same. The power inverter includes a switching circuit, an input circuit and a freewheeling diode bridge arrangement. The switching circuit comprises switch arms extending between the upper and lower branches of the switching circuit. The input circuit includes upper and lower isolating switches that can be selectively operated to respectively isolate the upper and / or lower branches of the switching circuit.

The utility model provides an LLC resonant converter charging device which is composed of a pre-stage Boost PFC circuit and a post-stage full-bridge LLC resonant converter circuit, and the pre-stage Boost PFC circuit comprises an LT4320 ideal diode bridge controller and a UCC28019 controller which are connected with each other. The Boost PFC circuit utilizes an LT4320 ideal diode bridge and a UCC28019 controller, so that the rectification loss is effectively reduced, and the overall energy efficiency of the system is improved. The four N-channel MOSFETs are driven by adopting the LT4320 ideal diode bridge controller, so that the voltage utilization rate is improved and the energy consumption is reduced in the voltage rectification process from direct current to 600Hz, and the low-voltage LED driving circuit is particularly suitable for low-voltage application.

The application discloses a buffer circuit and parameter configuration method of a diode bridge type power electronic switch, and relates to the technical field of power electronics. The buffer circuit of the diode bridge type power electronic switch comprises: a first buffer module, a first end of the first buffer module is electrically connected with a first end of a full-control type switching device, and a second end of the first buffer module is electrically connected with a second end of the full-control type switching device; a second buffer module, a first end of the second buffer module is electrically connected with a first end of the diode bridge type power electronic switch, and a second end of the second buffer module is electrically connected with a second end of the diode bridge type power electronic switch; and at least one buffer resistor, at least one buffer capacitor and at least one metal oxide lightning arrester are arranged in the first buffer module and / or the second buffer module. According to the embodiment of the application, the reliability and safety of the diode bridge type power electronic switch can be effectively improved.

Circuit arrangement for current measurement in a conductor (L) carrying a current (I), wherein a current transformer (CT) is configured to generate an input voltage (U) from the current (I) in the conductor (L), which is supplied to the input (B1, B2) of a diode bridge circuit (B), and a first output (B3) of the diode bridge circuit (B) is located at the junction of two identical first electrodes (E1, E2) of the diodes (D1, D2) of the diode bridge circuit (B), wherein a measuring resistor (R) for current measurement is inserted between the two identical second electrodes (E3, E4) of the diodes (D3, D4) of the diode bridge circuit (B), a second output (B4) of the diode bridge circuit (B) is located at the junction of one of the diodes (D3, D4) with the second electrodes (E3, E4) and the measuring resistor (R), and a extended bridge junction (B5) at the connection of the other diodes (D3, D4) with the second electrodes (E3,E4) and the measuring resistor (R), and that diode (D4) of the diode bridge circuit (B), which is located at the second output (B4), is formed by the source-drain diode of a first self-blocking field-effect transistor (T1), and that diode (D3) of the diode bridge circuit (B), which is located at the extended bridge node (B5), is formed by the source-drain diode of a second self-blocking field-effect transistor (T2), and a control device (CU) is provided to drive the gate (G1) of the first field-effect transistor (T1) and the gate (G2) of the second field-effect transistor (T2) by means of the same control voltage, and a measuring device (MU) is provided to measure a measuring voltage across the measuring resistor (R), which is proportional to the current (I) in the conductor (L).

The invention provides a hybrid circuit breaker and a circuit system, and belongs to the technical field of circuit breakers. The hybrid circuit breaker comprises a main branch, a transfer branch and an energy consumption branch which are connected in parallel, wherein the main branch comprises a mechanical switch and an auxiliary solid-state switch which are connected in series. The auxiliary solid-state switch comprises silicon carbide MOSFETs which are connected in series reversely, and the transfer branch comprises a diode bridge switch module which comprises a plurality of groups of diode bridge IGBT modules which are connected in series. In a normal working state, current flows through the mechanical switch and the auxiliary solid-state switch of the main branch, the current is transferred to the transfer branch after the main branch is disconnected, and the current is transferred to the energy consumption branch after the transfer branch is disconnected. The SiC MOSFET is used as an auxiliary solid-state switch, under the same conduction current, the forward and reverse conduction loss and heat production of the SiC MOSFET are smaller than those of an IGBT, and the SiC material is high in high-temperature resistance and high in normal working temperature. Under the condition of long-term through-flow, the natural cooling type radiator which is cheap and small in size is used, and the radiating size and the radiating cost are reduced.

The application belongs to the technical field of digital circuits, and particularly relates to an implementation method of a novel Shinriki chaotic oscillation circuit based on a memristor and a memcapacitor, which comprises the following: a cubic magnetic control memristor, which replaces a diode bridge to construct a Shinriki chaotic oscillation circuit; an exponential charge integral control memcapacitor, which replaces a capacitor to realize rich dynamic performance of the novel Shinriki chaotic oscillation circuit; a negative resistance converter, which supplies power to the novel Shinriki chaotic oscillation circuit; and an RLC resonance module, which starts oscillation of the novel Shinriki chaotic oscillation circuit and performs frequency selection oscillation. The novel Shinriki chaotic oscillation circuit based on the magnetic control memristor and the exponential charge control memcapacitor has important research significance and application value, and can enhance the nonlinear characteristics and multi-stable behavior of the oscillation circuit by introducing two types of memory elements and realizing digital platform verification.

The invention discloses a buffer circuit of a diode bridge type power electronic switch and a parameter configuration method, and relates to the technical field of power electronics. The buffer circuit of the diode bridge type power electronic switch comprises a first buffer module, the first end of the first buffer module is electrically connected with the first end of the full-control type switching device, and the second end of the first buffer module is electrically connected with the second end of the full-control type switching device; the first end of the second buffer module is electrically connected with the first end of the diode bridge type power electronic switch, and the second end of the second buffer module is electrically connected with the second end of the diode bridge type power electronic switch; the first buffer module and / or the second buffer module comprises at least one buffer resistor, at least one buffer capacitor and at least one metal oxide arrester. According to the embodiment of the invention, the reliability and safety of the diode bridge type power electronic switch can be effectively improved.