1368 results about "Energy feedback" patented technology

The invention relates to a control method which can be applied to an active-clamp flyback miniature photovoltaic grid-connected inverter device. The active-clamp flyback miniature photovoltaic grid-connected inverter device comprises a flyback converter and a power frequency polarity conversion circuit. In the device, a current reference is used for controlling a flyback primary-side current peak value so that the device can output a half-wave sinusoidal current, and the output voltage is clamped by a grid voltage. When the instantaneous power is lower, a constant frequency current discontinuous mode in combined with a variable frequency current critical continuous mode is adopted in the flyback control method. When the flyback converter works in a variable frequency current critical discontinuous mode, an auxiliary switching tube can be conducted for a period of time when the secondary-side current of the flyback converter reaches zero, the conduction time can be accurately controlled by a digital chip, thus realizing the leakage inductance energy feedback and the soft switch of a master switching tube under the condition of wide-range output voltages and different instantaneous powers and greatly improving the efficiency under the condition of full loads.

The invention provides an urban rail train regenerative brake energy absorbing and using system. The system comprises an energy feedback inverter, an energy-storing unit, a DC/DC (direct-current/direct-current) bidirectional converter and a direct-current flat-wave capacitor, wherein the direct-current side of the energy feedback inverter and the high-voltage side of the DC/DC bidirectional converter are connected in parallel with the direct-current flat-wave capacitor and are simultaneously connected in parallel with the anode and the cathode of a direct-current bus; the low-voltage side of the DC/DC bidirectional converter is connected with the energy-storing unit; and the alternating-current side of the energy feedback inverter is connected with the low-voltage side of a distribution transformer in a traction substation, and the energy feedback inverter is used for inverting regenerative brake energy on the direct-current bus to be used by electric equipment in the traction substation. The invention also provides a regenerative brake energy absorbing and using method based on the system. The energy feedback inverter and the DC/DC bidirectional converter are coordinated and controlled on the basis of the change status of the voltage of the direct-current bus, the train regenerative brake energy is quickly and fully absorbed, the voltage of the direct-current bus is kept stable, and the utilization rate of the train regenerative brake energy is improved.

The invention discloses a vehicle and a glide feedback control method thereof, wherein the glide feedback control method comprises the following steps: the present speed of the vehicle, the depth of a brake pedal of the vehicle and the depth of an accelerator pedal are detected; and when the present speed of the vehicle is greater than the preset vehicle speed, the depth of the brake pedal and the depth of the accelerator pedal are both 0, the present gear of the vehicle is D gear, the vehicle is not in a cruise control mode, and an anti-locking braking system of the vehicle is in a unworking state, the vehicle is controlled to enter a glide feedback control mode, wherein when the vehicle is in the glide feedback control mode, the glide feedback torque of a first electric generator and the glide feedback torque of a second electric generator are distributed according to the selected glide feedback torque curve of the vehicle. The glide feedback control method of the vehicle can recover the energy to the greatest extent under the precondition of guaranteeing the driving comfort of the vehicle, so that the energy feedback efficiency is improved.

The invention relates to a modularized energy feedback traction power supply device and a control method thereof, wherein, the device comprises a multi-winding transformer, a plurality of PWM rectifier units and a central controller, wherein, the multi-winding transformer is provided with a primary winding and a plurality of secondary windings, and all of the secondary windings have the same connecting mode; each secondary winding of the transformer is connected with a PWM rectifier unit; the direct-current outputs of all the PWM rectifier units are connected to a direct-current bus of the general power supply device in serials. Double closed-loop control of voltage and current is adopted; an outer loop of direct-current voltage is arranged on the central controller and an inner loop based on synchronous rotating frame is arranged on each PWM rectifier unit. The power supply device is remarkably characterized by easy modularization, large capacity, bipolar energy transmission, high power factor, small current harmonic wave and stable direct-current voltage.

The invention relates to an energy-saving drive circuit of a motor, and aims to provide a super capacitor-based energy-saving drive circuit of a motor and a control method. The main circuit of the circuit consists of a super capacitor bank, a super capacitor charge/discharge management circuit, a controllable rectifying circuit, a controllable rectifying control circuit and the like. Impact to a power grid when an elevator runs is reduced by optimized control of the controllable rectifying circuit and the super capacitor charge/discharge circuit and absorption of running power peak of the elevator, the controllable rectifying circuit bears the smooth part of the electric and generating power of the motor and has emergency power supply function after the elevator is cut off electricity, and the super capacitor and a DC bus form through connection in a normal state to achieve high efficiency. The drive circuit has the advantages of compact line and high integral work efficiency, the service life of the super capacitor is prolonged, and the integral technical and economic performance of the energy feedback elevator is improved. The drive circuit is particularly suitable for driving the energy feedback energy-saving elevator, and is also suitable for motor energy-saving drive situations of a crane and the like.

A permanent-magnetic DC motor bearing similar characteristics with the constant power pulling motor, in particular a new drive control system for brushless motor adopts new technologies of full electronic drive control and DC-DC transducer. The motor can generate great drive torque, i.e. high tractive force, climbing ability and better acceleration performance with low power consumption, and eliminate the needs for improvement to the motor structure, complication, high manufacture cost or weak magnetic control; the motor may further gain such performance as high speed, wide speed regulation and infinite variable speed under light load; the total voltage of the battery and the number of single series of connection can be reduced; controllable electric brake can be realized through fully utilizing the energy feedback during sliding and braking. The new system can significantly improve the kinetic performance, safety and reliability of electric vehicles and remarkably reduce operating costs, with ideal characteristics expected in various electric vehicles powered by rechargeable battery or/and super capacitance as well as significantly expanded work scope and capacity for conventional electrically driven system.

The invention relates to a hybrid brake system with an anti-lock braking function and a control method, which belongs to the technical field of hybrid power electric automobile, in particular to a serial braking energy feedback system which is provided with a braking air pressure adjusting mechanism and has the anti-lock braking function based on the system. The serial braking energy feedback system achieves serial feedback brake strategy under normal braking conditions through harmonizing feedback brake and friction brake, can ensure braking feeling at the same time of effectively recycling braking energy, and achieves the united anti-lock control strategy for the friction brake and the feedback brake when the wheel is locked or trends to be locked. The serial braking energy feedback system simplifies complexity of a braking system of the hybrid power electric automobile greatly, improves integrated degree of control, and can effectively recycle the braking energy at the same time of ensuring braking safety.

The invention discloses an electromagnetic type energy feedback shock absorber based on a Halbach permanent magnet array. Multiple groups of coil windings are arranged in an outer barrel of a belt trough, which is made of soft magnetic materials, and are introduced into and led out of a rectifying circuit via a lead; an inner barrel is provided with a Halbach permanent magnet array consisting of annular permanent magnets of different polarization directions; and the inner barrel and the outer barrel are connected by a spring. When the shock absorber is installed on a driving automobile suspension, axial relative displacement is generated between the inner barrel and the outer barrel by pavement vibrational excitation action transferred by an axle or wheels, and a coil winding magnetic linkage in the outer barrel is changed to generate induced electromotive force. Because the Halbach permanent magnet array has an obvious single-side strengthening characteristic, a magnetic field of which one side is provided with enhanced magnetic induction intensity is in sinusoidal distribution and has a small higher harmonic; and therefore, the absorber has the advantages of small volume, small quality and good energy recovery performance.

A high-voltage big-power frequency converter without harmonic wave pollution has an energy feedback device, a precharged circuit of bypass circuit and an easily changeable air filtering net added on the existing big-power and high-voltage frequency converter of power module unit in series connection. The said energy feedback device mainly consists of the feedback bridge control circuit and the feedback bridge connected in antiparallel at the side of rectifying bridge for each power module unit, the said bypass circuit includes the precharged circuit, silicon control and diode rectifying bridge which are connected in parallel at the said of each power module unit, the said air filtering net is mainly composed of the front panel and the filtering net supporting mechanism with the front panel having air ventilation holes on it.

The present invention relates to automobile technology, and is especially one series-parallel mixed power system. The present invention features the mixed connection structure of double motor and double clutch, the secondary motor for fast start of the engine, and the motor mode or the generator mode of both the main motor and the secondary motor. The secondary motor is connected to the output of the engine, the secondary clutch is set between the secondary motor and the main motor, and the main clutch is set between the gear box and the main motor. The mixed power system is similar to available internal combustion engine automobile in structure and has simple structure, compact arrangement, low manufacture cost, optimized running, braking energy feedback, low oil consumption, less harmful exhaust, excellent power performance and high running flexibility.

The invention relates to a vehicle pavement identification system and a suspension mode switching method and belongs to the field of automobile safety and comfort. A suspension mainly comprises sprung mass, an elastic element, a damper, a linear motor, unsprung mass, an acceleration sensor A, an acceleration sensor B, a displacement sensor A, a displacement sensor B, a current amplifier, an A/D converter, a signal storage unit, an ECU, a power amplifier and a D/A converter. The ECU (14) comprises a signal processing module, an analysis module, a judgment module and a control module, receives displacement signals and acceleration signals, measured by the vehicle sensors, of the sprung mass and the unsprung mass, grades road conditions by combining the vehicle speed and the damping coefficient and meanwhile controls the suspension by combining vehicle working conditions and switching different modes to meet the requirements of safety and comfort. According to the vehicle pavement identification system and the suspension mode switching method, the linear motor is adopted as an actuator, brake energy of the suspension can be recovered under good road conditions for supplying to other systems for using, and energy feedback performance is achieved.

The invention provides lift energy feedback, reactive compensation and switched-off emergency running method and system. The system comprises an energy feedback module, a reactive compensation module and a lift switched-off emergency running module. The energy feedback module comprising an inverted circuit, a control circuit and a filter circuit and the reactive compensation module can feed back energy generated when a lift brakes to a power grid and generate reactive current for compensating reactive power when the lift is in an electric running state; and a lift switched-off emergency running circuit can ensure that lift control power is taken over by the switching of a switch under abnormal power supply of the power grid, run the lift to the leveling position and open a car door and a hall door so that a passenger safely walks out of the lift. The system has the advantages of simple structure, reliable running, less loss, low cost, high power factor and no harmonic pollution on the power grid and integrates various functions of lift frequency converter plug-in type energy feedback, reactive compensation, emergency leveling, and the like.

The invention relates to a high/low voltage switching excitation system of an electromagnetic flowmeter with a bypass and an energy feedback circuit. The excitation system comprises an adjustable low voltage source circuit, a high/low voltage switching circuit, a constant-current circuit, a bypass circuit, an H-bridge excitation circuit, an excitation control circuit, a logic switching circuit, apower supply detection circuit, the energy feedback circuit and an energy leakage circuit. A practical excitation current detected on a current detecting resistor is compared with an excitation current threshold set in the logic switching circuit, thereby obtaining a control logic which is used for controlling the high/low voltage switching circuit and the bypass circuit, so as to select an excitation work voltage; introduction of the bypass circuit accelerates the response velocity of the excitation current in a coil obviously; the energy feedback circuit stores the energy fed back from an excitation coil; the power supply detection circuit, the energy leakage circuit and a switching protection circuit perform electrification, outage and error protection on the excitation system. The excitation system related to the invention improves the utilization rate of power supply, accelerates the response speed of excitation current, broadens the range of excitation frequency and provides circuit fault protection.

The present invention provides a step-up high-frequency link inverter, the circuit structure is composed of an input filter circuit, a dumping inductor, a high-frequency inverter, a high frequency transformer, a frequency current converter, an output filter circuit cascaded in orders, a high frequency electrical isolation fly-back converter energy feedback circuit composed of the frequency current converter, the high frequency energy storage transformer, the rectifier cascaded in orders is connected between the output load and the input DC power, capable of transforming the unstable DC voltage to the needed stable sinusoidal voltage having high grade, the inverter has advantages of high frequency electrical isolation, high output and input voltage matching ability, double-directional power flow, high transforming efficiency, small volume, light weight, small input current ripple, high load adaptability, lower audio noise, high credibility when the load is shortened, lower cost, large output capacity, wide application, establishing a critical technique for the new type inverter and static inverter having large capacity.

The invention discloses a brake energy feedback control method of a pure electric automobile. The method comprises the following steps of: judging whether a brake signal exists, if so, judging whether an ABS (antilock braking system) works, and if the ABS works, enabling a brake force Fm of a motor to be 0, enabling the front axle brake force Ff and the rear axle brake force Fb to be controlled by the ABS; if the ABS dose not work, adjusting based on the fact whether the maximum brake force Fmax provided by the motor currently meets the brake threshold value F, the sliding rate threshold value S of the front axle wheels and other factors required by a driver; if no brake signal exits, judging whether the automobile is in a sliding state, if so, judging whether a current speed V is greater than the sliding speed threshold value V0, if V is greater than V0, controlling the motor to provide the brake force Fh needed by over-speed sliding of the automobile, and if V is less than or equal to V0, requiring no braking for the automobile; and repeating the steps till the driver steps on an acceleration pedal or the automobile stops moving, ending the brake. By the method in the invention, the use efficiency of the entire automobile energy can be increased.

The present invention is a high voltage synch motor digitalized vector control device which comprises a high voltage input dephasing isolating transformer and a power unit module that is provided with energy feedback. The two units are connected in series to form a three-phase high voltage variable frequency output. The present invention also consists of a digital processor, a programmable logic component, a digital high voltage synchronous machine vector controller that is formed by relative surrounding circuit, a rotor position and speed feedback encoder that is connected with the controlled synchronous motor with the same axle and a monitor transducer of the output current of the frequency changer; the surrounding circuit consists of an optical fiber connector and an upper monitor system that gives frequency. The present invention has the advantages of less pollution to the grid, needless of reactive-load compensation equipment, fast response, wide range of speed regulation ratio, actuated by constant torque and quadrant operating power.

The invention discloses a method and a device for recovering mixed regenerative energy of an urban railway power supply system. The method comprises the steps of determining an energy feedback/absorption mode according to the AC power grid failure state, controlling an energy feedback converter to feed regenerative brake energy back to the AC power grid in the energy feedback mode, and converting regenerative brake energy into direct-current low-voltage electricity to be absorbed by an energy absorption component in the energy absorption mode. The device comprises a direct-current disconnecting switch unit, an energy feedback transformer, a converter control unit and at least one converter unit. Each of the at least one converter unit comprises the energy feedback converter, an energy feedback branch switch K1, an energy absorption branch switch K2 and three energy absorption components. By means of the method and the device, regenerative brake energy is absorbed by the energy absorption component during the failure of the AC power grid to maintain the stability of the DC power grid voltage, and the connection between the energy recovery device and the DC power grid is not needed to be cut off, so that the safe reliability of the energy recovery device is improved, the structure of a chopper can be omitted, and costs are saved.

The energy feedback type AC/DC electronic load simulator consists of two stages of PWM inverters with common DC bus as key parts. The input PWM inverter stage is connected through input filter inductor to the tested power source to constitute the load characteristic simulating part of electronic load; the output PWM inverter stage is connected through the isolating transformer and output filter inductor to the power network to constitute the energy feedback part of electronic load; and the load characteristic simulating part and the energy feedback part are independently controlled. The load characteristic simulating has single instantaneous current value control mode controlling the input load current amplitude and waveform, and the energy feedback has current and voltage double closed-loop control mode including phase lock loop to control the current waveform in the output network side and the bus voltage in the DC side. The present invention has small loss and high network side power factor.

The invention discloses a real-time control device and method for energy feedback damping of an electromagnetic energy feedback type semi-active suspension. The lower input end of an energy feedback motor is connected with a planetary gear acceleration mechanism, and the lower input end of the planetary gear acceleration mechanism is connected with the upper end of a ball screw; an energy feedback control circuit comprises a voltmeter, controllable switches and storage batteries; a charging voltage capable of meeting the energy feedback damping force is selected from the voltage of one storage battery, the voltage of two adjacent series storage batteries and the voltage of three series storage batteries, turn-on and turn-off of the corresponding controllable switches are controlled by a control unit, and the storage batteries are charged according to the principle that the storage battery with lowest voltage or the two adjacent series storage batteries with minimum voltage sum are preferentially charged; and the energy feedback motor can work in a rotating speed range with highest efficiency, the energy conversion efficiency is improved, and energy feedback damping of an electromagnetic energy feedback damping force generator is subjected to real-time hierarchical control.

The invention relates to an automotive anti-lock braking and braking energy feedback integration control hardware-in-the-loop test bed, which comprises a front braking gas path, a rear braking gas path, and a braking control unit, wherein the front braking gas path comprises a gas source, a gas storage cylinder and a front braking feedback regulation valve which are orderly and serially connected, and a gas outlet end of the front braking feedback regulation valve is connected with two gas paths which consist of a front ABS electromagnetic valve, a front braking gas chamber and a front brake respectively and are serially connected; the rear braking gas path comprises a gas source, a gas storage cylinder and a rear braking feedback regulation valve which are orderly and serially connected, and a gas outlet end of the rear braking feedback regulation valve is connected with two gas paths which consist of a rear ABS electromagnetic valve, a rear braking gas chamber and a rear brake respectively and are serially connected; and the braking control unit comprises pressure sensors, a wheel speed sensor, a host, an Autobox, a data acquisition and signal emission system connected with the Autobox, an electronic control unit and a bench. The test bed can simulate mixed-power commercial vehicles with air pressure braking systems, and perform braking control and research on the mixed-power commercial vehicles.

The present invention relates to automobile technology and is one series parallel mixed power system, which includes engine, auxiliary clutch, main motor, main clutch, gear box, belt wheel clutch, belt wheel motor, front belt wheel system, engine fitting system, power cell, auxiliary cell, motor drive controller, high voltage safety controller, power cell controller, DC converter, vehicle controller, engine controller, the first half axis and the second half axis. The belt wheel motor driving the belt wheel is connected via a clutch to the engine and can drive the engine fitting system independently. The main motor is connected via an auxiliary clutch to the engine and connected via a main clutch to the input shaft of the gear box. The present invention has simple structure, compact configuration, low cost, optimized running efficiency, effective braking energy feedback and other advantages.

The invention discloses an energy feedback type traction power supply device with a reactive compensation function and a control method thereof. The device comprises a dual-split transformer, two high-power bidirectional converters, a direct-current filter inductor and a central control unit, wherein each vice-side winding of the dual-split transformer is connected with one high-power bidirectional converter; direct-current output sides of the two high-power bidirectional converters are connected in series, and the direct-current filter inductor is connected in series between a direct-current positive output and a direct-current contact network of the first high-power bidirectional converter; and the central control unit is connected mutually with the two high-power bidirectional converters through a controller area network (CAN). In the control method, the hierarchical control is adopted, the central control unit is used for calculating an active current instruction and a reactive current instruction, and the two high-power bidirectional converters perform closed loop control on alternating current of the two high-power bidirectional converters according to the active current instruction and the reactive current instruction. The device not only can meet the requirements of traction power supply and braking energy feedback of subway trains, but also has a reactive compensation function used for improving power factors at incoming wires of master substations.

The invention relates to a double-boost energy-feedback PWM rectifier circuit, which can work in an AC/DC rectification or DC/AC active inverter energy-feedback mode. It is composed of input power supply, two step-up bridge arm circuit units, output filter capacitor and load circuit. The first boost type bridge arm circuit unit is composed of a power switch tube, a power diode and a boost inductor; the second boost type bridge arm circuit unit is composed of a power switch tube, a freewheeling diode and a boost inductor; the output filter capacitor and load The circuit consists of two capacitors and a load. The two step-up bridge arm circuit units work in turn for half a power grid cycle, and the control circuit can select the corresponding step-up bridge arm circuit unit to work according to the positive and negative half cycle judgment of the input current. The energy of this circuit can flow bidirectionally, there is no bridge arm through problem, and the work reliability is high; only one power tube is chopped at high frequency in each switching cycle, and the loss is small. The rectification circuit has good application prospects in UPS, aerospace and other occasions.

The invention discloses a brake energy recovery hydraulic braking system based on a VDC (Vehicle Dynamics Control)/VSC (Vehicle Stability Control)/ESP (Electronic Stability Program) pressure regulator, comprising a pressure regulator with the function of VDC/VSC/ESP, a braking main cylinder, a braking electric motor, a braking controller and a hybrid control unit. The brake energy recovery hydraulic braking system is characterized in that a main cylinder pressure sensor is arranged on an oil outlet pipeline of the braking main cylinder; a wheel cylinder pressure sensor is arranged on a front wheel cylinder of the pressure regulator; signals of the main cylinder pressure sensor and the wheel cylinder pressure sensor are all fed back to the braking controller; a drive electric motor is controlled by the hybrid control unit; and the braking controller performs CAN (Controller Area Network) communication with the hybrid control unit. The pressure regulator controls two paths of braking oil paths of front left wheel-right rear wheel and right front wheel-left rear wheel. The invention utilizes the drive electric motor to return braking torque to carry out brake energy feedback, utilizes the VDC/VSC/ESP pressure regulator to realize the increase, the maintenance and the decrease of the pressure of the wheel cylinder, ensures the drive safety, and can realize the regenerative braking and the integrated control of ABS (Anti-lock Brake System), ASR (Acceleration Slip Regulation) and ESP (Electronic Stability Program).

Disclosed are an energy switching control method and an energy switching control system for a hybrid electric vehicle in multiple operating modes. The energy switching control method includes the steps: firstly, according to vehicle running environments and road conditions detected in real time by a vehicular GPS (global positioning system) and a sensor, and according to current running road condition information of the hybrid electric vehicle, determining the corresponding operating modes of the vehicle, wherein the operating modes specifically include an engine-driven operating mode, a motor-driven operating mode, an engine and motor hybrid driven operating mode and an energy feedback and regenerative brake operating mode; and then designing a multi-mode switching control rule for the driving modes in terms of the running road conditions, and designing corresponding controllers for the operating modes respectively. According to the running environments and the road conditions, the energy switching control method and the energy switching control system control the optimal vehicle driving modes so as to reduce emission of vehicle exhaust, save fuel oil consumption, accelerate development of environment-friendly vehicles and green vehicles and improve endurance of the hybrid electric vehicle.

The invention relates to an insole material of lightweight high-elasticity sports shoes and a manufacturing method thereof, in particular to a method for manufacturing insoles of high and medium-grade sports shoes with high requirements on light weight and rebound elasticity. A series of foaming shoe insole materials with density of 0.15 to 0.20 g/cm<3> and impact resilience of 55 to 59 percent are manufactured by introducing an ethylene-polar monomer copolymer and natural rubber or ethylene propylene diene rubber on the basis of an ethylene-octylene copolymer. Compared with the conventional shoe insoles in the market, the prepared foaming material has lower density and higher elasticity. The insole material has the advantages that: high elasticity of the sole contributes to energy feedback and light start; and the sole density is low, so physical consumption of a user can be reduced, production cost can be obviously reduced and energy is saved.