161 results about "Power topology" patented technology

A tool is described to aid in the design and verification of multi-input, multi-output power supply systems. The designer describes the system requirements and constraints to the tool, which allows an iterative exploration of various alternative designs that satisfy the requirements and constraints. Alternative designs may comprise different power supply topologies, multiple controllers or multi-controllers, or configurable controllers that implement the power supply system. The tool generates a design for a power supply system that is reconfigurable to allow for performance optimization. The power supply system is configurable automatically according to a digital control signal. The digital control signal comprises configuration data which establishes the structure of the power supply system, and which determines the output power conditions of the power source. The different conditions generated by configuration data comprise output voltage, sequencing information, current, topology, and other operational conditions such as overload protection.

Determining power topology of a computer system. At least some of the illustrative embodiments are methods including communicating with a first computer system of a plurality of computer systems mounted in a rack (the communicating through dedicated communication conductors integral with a first cord carrying operational power to first computer system), communicating with a second computer system of the plurality of computer systems (the communicating through dedicated communication conductors integral with a second cord carrying operational power to first computer system), determining a power topology regarding the plurality of computer systems based on the communicating, and displaying an indication of the power topology.

The invention relates to a modular multilevel converter (MMC)-based transformer-free four-quadrant high-voltage variable frequency power supply topological structure. A rectifier module and an inverter module have a modular multilevel structure and are formed by a plurality of subunits connected in series. The input side of the topological rectifier module is directly connected with a network-side high voltage through a charging circuit; the rectifier module converts a high-voltage alternating current (AC) voltage into a direct current (DC) voltage and inputs the DC voltage into the inverter module, and the inverter module converts the DC voltage into the AC voltage; and various states of a power system are simulated, and the topological structure has a four-quadrant type and can feed energy back. The topological structure has the advantages of removing the high-voltage transformer at the power input end, lowering cost, reducing volume and weight of a high-voltage variable frequency power supply, reducing consumption of components, and improving work efficiency, has a simple unit structure, and is convenient to wire and easy to disassemble and assemble.

Optimal power supply topologies that do not use output bulk capacitors as well as freewheeling diodes in output section to therefore provide efficiency, cost, volume, and weight advantage over the existing solutions. The present invention applies a pulse-width modulated switched current at higher frequency (in order of 10 to 100 kHz) to LEDs without degrading optical performance. LEDs' average current control is attained using a feedback loop that senses the average value of LEDs' current and controls the current by varying the pulse width of applied current.

The invention relates to a self-adaptive digital DC/DC control method which has fast dynamic response and a converter. The self-adaptive control method related by the invention is implemented in a secondary side controller. In the control method, error detected is positive (negative) when sag (uprush) happens to an output voltage, and a first PID with good steady-state characteristics is switched to a second PID with good dynamic characteristics when the absolute value of the error exceeds a preset threshold value, the output voltage begins to enter a steady state when the error turns to be negative (positive), and the second PID is switched to the first PID when alternative changes between positive and negative errors are continuously detected, for which a steady state is deemed to be realized. The circuit structure of the DC/DC converter comprises a main power topology, an isolating transformer, a primary side controller, the secondary side controller, a driving circuit, a voltage and current detecting channel, a feedback and sampling channel, a primary side assisting source, a secondary side assisting source, a parameter memorizer and a communication interface. The control method of the invention has reasonable design and the converter is simple and practical.

The invention discloses a magnetic suspension energy storage flywheel charging and discharging control method based on minimum power topology, and is used for finishing the high-efficient magnetic suspension energy storage flywheel charging and discharging control to realize the energy conversion of electric energy-kinetic energy-electric energy. The power topology comprises a DSP (Digital Signal Processor) control unit, a power driving and protecting circuit, a bypass relay, a soft boot resistor, an equalizing resistor, a voltage stabilization capacitor, an IGBT (Insulated Gate Bipolar Translator) switching tube, a Hall current sensor, a permanent magnet synchronous motor, a flywheel and a direct-current load, wherein the IGBT switching tube is under a high-frequency inversion state when direct-current bus voltage Udc is higher than charging voltage, a permanent magnet synchronous motor drives the flywheel to be accelerated, and the flywheel is under a charging mode to finish the conversion of the electric energy to kinetic energy; when the direct-current bus voltage Udc is lower than discharging voltage, the IGBT switching tube is under a PWM (Pulse-Width Modulation) rectification state, the revolving speed of the flywheel is lowered, and the permanent magnet synchronous motor is under a discharging mode to finish the conversion of the kinetic energy to the electric energy. The magnetic suspension energy storage flywheel charging and discharging control method is used for the high-efficient magnetic suspension energy storage flywheel charging and discharging control.

The invention relates to a modular multilevel converter sub-module simulation model of considering a secondary loop. The modular multilevel converter sub-module simulation model comprises two IGBTs, two diodes, an energy storage capacitor, an equalizing resistor, an energy taking power supply and a central control board, wherein input ends of the equalizing resistor and the energy taking power supply are connected with two ends of the capacitor in parallel; the energy taking power supply converts capacitor voltage into low-voltage DC for supplying the central control board with electricity by using a DC/DC switching power supply topology; and equivalent resistance of the energy taking power supply dynamically changes according to the differences in working state and voltage value. The influence of secondary loop parameters of the efficiency of the equalizing resistor, the efficiency of the energy taking power supply, the power of the central control board and the like on voltage and current of a sub-module are expressed by using a switch function, so that the simulation model is closer to the actually used sub-module in a flexible DC power transmission project. The modular multilevel converter sub-module simulation model aims at reflecting the influence of the secondary loop in a practical project on the sub-module through one simulation model, especially voltage and current waveform simulation in the startup and shutdown processes of a converter is achieved, so that the simulation result is closer to the engineering practice.

The invention discloses a circuit load regression analysis and prediction method and system. The method refers to a method for circuit load prediction based on load data of users mounted below a circuit; through network frame topology analysis in a power system, a district transformer and a large-customer transformer mounted below the circuit are subjected to related analysis; feature vectors of a training set and a test set are established by collecting operating data and external data (meteorological data, special event data and the like) of the district regions and large customers; and load prediction is carried out on each district region and large customer by adopting a regression prediction method, and a regression equation of the circuit is established according to the load prediction of each district region and large customer, so as to form the prediction method for the circuit load based on user view. The circuit load is predicted through the operating data of the district regions and large customers in the circuit, so that a relation between the circuit and the mounted transformer in the power topology can be reflected effectively; and the relation between the circuit load and users thereof is displayed by multi-dimensional data in a more effective manner.

According to one aspect, embodiments of the invention provide a power supply system comprising an input configured to receive input AC power from an input power source, an output configured to provide output AC power to a load, a converter coupled to the input and configured to convert the input AC power into converted DC power, a first DC bus coupled to the converter and configured to receive the converted DC power, an inverter coupled to the first DC bus and the output and configured to convert DC power from the first DC bus into the output AC power, a first DC switch circuit coupled between the first DC bus and neutral and a controller coupled to the first DC switch circuit and configured to operate the first DC switch circuit such that voltage on the first DC bus is zero during switching operation of the converter and the inverter.

The invention provides a solar wing on-orbit output power assessment method under novel power topology. The method realizes on-orbit power evaluation of a solar cell array under the new generation PCUpower topology by measuring and calculating parameters of each part of the solar cell array, and is used for solving the problem that a solar wing on-orbit power assessment method in the prior art cannot be suitable for the new generation PCU. By utilizing on-obit telemetry parameters of whole-satellite load current, subarray shunt regulation state, solar cell array current, orbit position and date and the like, the method can determine in-orbit power output capacity of the solar cell array in real time, and carry out effective verification on the ground design result; and the method is highin reliability and high in precision.

The invention relates to a switched reluctance motor power converter and a control method thereof. The novel power topology structure is adopted, compared with a traditional asymmetric half-bridge power converter, the power device is reduced, the switching loss is reduced and the overall system efficiency is improved. By using the novel power topology, the second electrolytic capacitor C2 can provide high voltage excitation state in the initial excitation process of SRM, so as to achieve the purpose of fast excitation, and the peak current in the conduction region is increased, which is beneficial to increase the output torque in the conduction region. In the off-off current mode, the load voltage of the phase winding is much higher than the back voltage of the DC input voltage, which is helpful to widen the conduction range and increase the output torque of the motor, and also makes the selection of the on-angle and off-angle more flexible. It can meet the large-scale application requirements of various single-phase, two-phase, three-phase or multi-phase switched reluctance motors in low-cost, low-speed and high-torque application occasions.

The present invention discloses a switched reluctance motor four-level power circuit. A multi-phase independent boosted circuit portion is added on the basis of a traditional asymmetric power conversion circuit, the switched reluctance motor four-level power circuit comprises a public boost capacitor C2, switch tubes VTA1, VTB2 and VTC1, and diodes VDA1, VDB2 and VDC1. Through control of the switching of switch tubes in the power topology, each phase winding of a switch reluctance motor can be independently switched and operated in the four states of high speed excitation (+2), high speed demagnetization (-2), normal excitation (+1) and zero-pressure follow current (0) and can be not mutually disturbed. The independent switch of the four levels of each phase of switched reluctance motors is realized to make the overlapping operation (a conduction angle is larger than 120 degrees) of four-level power circuit work in each phase possible. A common capacitor replaces an independent capacitor of each-phase boosted circuit to effectively reduce the size of the power circuit, and the switched reluctance motor four-level power circuit has a high-robustness, high-reliability and compact structure, and has a large application prospect.

A power supply topology with pulse width modulation frequency control allows the use of an inductor with higher inductance in a converter. By controlling the switching frequency of the pulse width modulation signal, the inductor can achieve high efficiency during a light load condition and is also suitable for a heavy load condition.

The invention discloses a multi-mode switching composite power supply topological structure of an electric vehicle and a control method. The multi-mode switching composite power supply topological structure of the electric vehicle comprises a first voltage stabilization capacitor, a second voltage stabilization capacitor, a battery pack, a super capacitor, a motor inverter, a voltage sampling circuit, a current sampling circuit and an ARM controller, wherein a first energy storage inductor, a first MOS tube and a fourth diode form a main booster circuit; a second energy storage inductor, a second MOS tube and a third diode form an auxiliary boost-buck circuit; the controller controls the MOS tubes to be connected or disconnected according to the actual requirement of the electric vehicle, to realize the switching or combination of the main booster circuit and the auxiliary boost-buck circuit; during output, on the basis of guaranteeing the power performance of the electric vehicle, the optimal boosting mode of the super capacitor or the running charging mode is chosen, to decrease energy loss; during braking, the super capacitor is chosen preferentially to recover energy independently, and to ensure system safety, the boosting mode is adopted to charge the battery pack when the super capacitor is about to be fully charged, so that the stability of braking energy recovery is guaranteed.

A power supply system can include a primary power supply coupled to an output, and a secondary power supply coupled to the output. The primary power supply provides power to the output when a voltage level of the secondary power supply is less than a first predetermined level. The secondary power supply provides power to the output when the voltage level of the secondary power supply is greater than the first predetermined level. The secondary power supply not only provides power to the output, but also charges the primary power supply when the voltage level of the secondary power supply is greater than a second predetermined level that is greater than the first predetermined level.

The present application relates to a power system power flow calculation method and system and an electronic device . The method comprises the following steps: a, analyzing the topology state of the power network in parallel based on the big data technology Spark to obtain the topology information of the power system; B, constructing a power topology diagram accord to the power system topology information, and carrying out parallel iteration on the power topology diagram based on the big data technology Spark to generate an electric island of the power topology diagram; c, calculating the balanced node power and the line power of the power system according to the electric island of the power topology diagram to obtain a power flow calculation result. The application supports the integratedanalysis of a power system in which a plurality of regions are interconnected, reduces the management problem and communication overhead caused by the centralized management of topology information,and has the characteristics of expandability, convenience for maintenance, and the like, and can effectively improve the utilization rate and computational efficiency of data, and realize the real-time online power flow calculation of large-scale complex power system.

A multi-processor controller is provided. The multi-processor controller can be used to control the operation of an inverter in a vehicle-based electric traction system. The multi-processor controller includes a first processor device having a first supply voltage node, a second processor device having a second supply voltage node, a first voltage regulator, and a second voltage regulator. The first voltage regulator has a first output voltage node coupled to the first supply voltage node, and the first voltage regulator is configured to generate a first regulated supply voltage for the first processor device. The second voltage regulator has a second output voltage node coupled to the second supply voltage node, and the second voltage regulator is configured to generate a second regulated supply voltage for the second processor device.

The invention discloses a novel two-stage multi-level power inversion system. A front-stage multi-way output DC-DC (Direct Current-Direct Current) convertor and a diode clamping multi-level inverter are cascaded to serve as power topology. Voltage boosting of a power supply and active control on neutral-point voltage of the multi-level inverter can be realized by closed-loop control on voltage of the front-stage DC-DC convertor; and the back-stage clamping multi-level inverter can realize functions of motor driving, grid-connected inversion, isolated grid operation and the like. A method can realize the voltage boosting by the front-stage DC-DC convertor at the same withstand voltage of switching tubes; limitation of a voltage class of a DC power supply can be overcome; a high voltage class load can be adapted; the front-stage DC-DC convertor overcomes an influence of interrupted current input or low-frequency pulsation of the traditional inverter on the DC power supply; the problem of difficult balance of the neutral-point voltage of the clamping multi-level inverter can be overcome by utilizing the active control ability of the front-stage DC-DC convertor on the voltage; and multi-level inverter control of variable neutral-point voltage can be realized to acquire low current.

The invention discloses a topology control method for reducing inter-link interference, which mainly solves the problem that the reduction of the inter-link interference cannot be guaranteed existing in the prior art. The implementation process of the method comprises the following steps: constructing a maximum power topology by a central control node; traversing all edges in an edge set of the maximum power topology by the central control node by taking the interference of the edge as standard, deleting and optimizing the edge set to construct an entire network topology; broadcasting entire network topology information by the central control node to all nodes in a network except for the central control node; determining logic neighbor nodes of all the nodes except for the central control node in the network by the nodes except for the central control node according to the received entire network topology information and adjusting the transmitting powers of the nodes. The topology control method has the advantages that the energy consumption of the node is reduced and the inter-link interference is reduced, and can be used for a wireless sensing network.

The invention discloses a lithium battery management system integrating information collection, data communication, and power balance functions, the system includes a battery pack controller and a plurality of cell controllers, the input port of each cell controller is connected with a cell, the plurality of cell controllers are connected in series to form a battery pack at the output terminal thereof, the output terminal of the battery pack is connected with the output terminal of the battery pack controller, and the input terminal of the battery pack controller is connected with an electricity utilization load or a charging device. The power topology of the cell controllers adopts a bidirectional DC-DC converter for realizing charging or discharging of cells; the cell controllers and thebattery pack controller communicate through power signal composite modulation communication. The invention can realize multiple functions such as information collection, data communication, battery electric energy active balance, battery pack protection, and historical information storage, and has the advantages of low communication cost, simple maintenance, wiring harness saving, compact structure and convenient secondary use of the battery.

The invention discloses a power buffer design method based on model predictive control. By utilizing a characteristic of multi-objective optimization of the model predictive control, a three-phase rectifier bridge and a DC/DC converter are controlled at the same time. A target optimization function is designed by adopting a finite set method; in combination with constraint conditions of differentenergy flow coupling, an overall control model is built; multi-objective optimization control can be realized by adopting the model predictive control method; and for a power supply system with an energy storage device, an active energy management mode is adopted, so that the energy optimization distribution of a more electric aircraft can be realized. Therefore, direct-current bus voltage is stable. The model performs buck-boost control on the bidirectional DC/DC converter according to the energy feedback condition of a motor, and direct-current bus power is stable through charging and discharging of a battery pack. The power topology of the power buffer converter is adopted; and the direct current bus power is compensated and absorbed through a storage battery, so that the weight of theaircraft can be effectively reduced.