66 results about "Current regulator" patented technology

The invention relates to the technical field of backlight control, in particular to an LED display-oriented adaptive PWM backlight control method and a backlight driving system, which are suitable for the backlight driving system comprising a boost converter, a brightness controller and an LED channel, and the method comprises the following steps: the brightness controller outputs a control voltage, a peak current control word and a duty ratio signal, and receives a state signal. Receiving brightness data, determining a nominal peak current and a duty ratio, and initializing the nominal peak current and the duty ratio; adjusting the control voltage to change the boost output, monitoring the state, locking the working point when all states are converted from the first state to the second state, and taking the final switching channel as a reference; a peak current word is increased for the non-reference channel under the working point, and when the state returns to the first state from the second state, an optimized peak current is taken back; and adjusting the duty ratio according to the ratio of the nominal peak current to the optimized peak current to enable the average current of each channel to be consistent. According to the invention, the problem that excessive voltage drop of a linear current regulator causes extra power consumption and heating and influences the brightness consistency between channels is solved.

The invention discloses a motor control method, device and equipment and a medium, and relates to the field of motor control, when a mode switching condition is met, switching operation is not executed immediately, and the switching time is set at the commutation time of a motor, so that natural transition of a phase angle of a reference voltage vector is ensured; meanwhile, based on the running state of the motor in the first control mode, an integral initial value of the current regulator in the second control mode is preset, so that smooth connection of the amplitude of the reference voltage vector is realized. Through cooperative control of the phase angle and the amplitude, the problems of unstable motor operation, speed fluctuation, equipment stress damage and the like caused by discontinuous jump of the reference voltage vector at the switching point are solved, and the effect of improving the motor control performance and the system operation reliability is achieved.

The smart torque simulation device includes: a bracket; a shaft center; a winding wheel which having a winding wheel spinning encoder; an outer flywheel which an outer flywheel spinning encoder, the winding wheel and the outer flywheel are relatively coupled with a magnetic plate and a magnet; an inner flywheel with a field magnet, the inner flywheel has a power transmission relationship with the outer flywheel; a coil set, having a coil fixing frame which has an armature coil, and the armature coil is coupled to the field magnet of the inner flywheel, the armature coil has an electric current regulator; and a control system, receiving a winding wheel spinning data from the winding wheel spinning encoder and receiving an outer flywheel spinning data from the outer flywheel spinning encoder, and then sending an armature electric current control data to the electric current regulator.

The application discloses a kind of self-adaptive power energy storage converter control method and system, this method can effectively solve the problem of overvoltage and under-voltage of grid-connected point and overcharge and overdischarge of energy storage battery by controlling the adaptive charge and discharge of energy storage battery.First, the grid voltage is sampled and the effective value is processed to obtain the grid voltage effective value feedback signal U gf_rms , and it is sent to the inverting input end of voltage error amplifier, and the grid voltage reference U ref Is sent to the non-inverting input end of voltage error amplifier.The output U e Of voltage error amplifier is obtained by positive and negative limiting link U e1 Is sent to one input end of multiplier.The state signal J of range determination is obtained by the state of charge signal Soc of energy storage battery, and the other input end of multiplier is sent.The output I ref Of multiplier is sent to the non-inverting input end and inverting input end of current regulator respectively with the charging current sampling signal I bf Of energy storage battery.The output of current regulator is used as modulation signal, and it is sent to PWM modulator.

The present application relates to a kind of permanent magnet shielding motor vector control energy efficiency optimization method considering magnetic field lagging phase angle, belong to permanent magnet shielding motor control field.It is characterized by: by analyzing shield sleeve eddy current effect, the analytical expression of magnetic field lagging phase angle is derived using electromagnetic field theory;The lagging phase angle is introduced into permanent magnet flux linkage term to be corrected, and the eddy current loss of shield sleeve and stator iron loss are combined into equivalent iron loss component, and a system controllable loss model is constructed;Under the constraint of constant torque, the analytical expression of total controllable loss about direct-axis current is derived and the optimal direct-axis current given value is solved.The actual application introduces angle compensation in the coordinate transformation link of vector control system, and the optimal direct-axis current given value is sent into current regulator, the accurate decoupling of dq axis current is realized, the total loss of motor is reduced, so as to improve the overall efficiency of motor control system.

The disclosure relates to a battery system. The battery system comprises a first battery cell unit and a second battery cell unit, each one comprising a respective current regulator arrangement configured to control charging of a respective battery cell unit. The battery system further comprises a control arrangement. The control arrangement is configured to selectively control charging of the first and second battery cell units, by controlling the current regulator arrangement of the first battery cell unit to charge the first battery cell unit, and simultaneously by controlling the current regulator arrangement of the second battery cell unit to heat said second battery cell unit. The heating is performed by a pulsed charging cycle, preferably wherein the pulsed charging cycle is delivered by pulses having a frequency of 1 Hz – 1 MHz, preferably 10 Hz – 100 kHz. The disclosure further relates to a computer program and a computer-readable medium.

On-board electrical system arrangement (2) comprising at least one primary on-board electrical system (4) and one secondary on-board electrical system (5) for supplying a plurality of consumers (10.n) in a vehicle (1), characterized by the fact that the primary electrical system (4) for providing primary power (4.11) for supplying consumers (10.n) can be coupled to an electrical system battery (3) or is coupled and the secondary on-board network (5) is coupled to the on-board network battery (3) to provide a secondary power supply (5.11) for the redundant supply of a part (11.nm) of the consumers (10.n). wherein a switchable balancing device (8) is arranged between the primary electrical system (4) and the secondary electrical system (5), which couples or keeps coupled or decouples or keeps decoupled the primary electrical system (4) and the secondary electrical system (5) depending on the power supply, wherein in normal operation (100) of primary on-board network (4) and secondary on-board network (5) the balancing device (8) is open in order to decouple the primary on-board network (4) and the secondary on-board network (5) from each other, wherein in the coupled state of primary on-board network (4) and secondary on-board network (5) a current regulator for providing the primary power (4.11) is provided in the primary on-board network (4) as a regulator (20) and a voltage regulator for providing the secondary power (5.11) is provided in the secondary on-board network (5) and in the uncoupled state both in the primary on-board network (4) and in the secondary on-board network (5) a voltage regulator for providing the primary power (4.11) and the secondary power (5.11) is provided as a regulator (20, 22).

An audio converter power supply is provided with a cascade regulator comprising a current regulator (140) in an inner loop, which operates in the audio frequency range, and a voltage regulator (150) in an outer loop, which only operates below the audio frequency range and essentially does not operate in the audio frequency range. The audio frequency range is between 20 Hz and 22 kHz.

The invention relates to the technical field of electric energy conversion and control, and provides a bus voltage fluctuation suppression system and method based on voltage ANF orthogonal phase shift compensation. The system comprises a direct-current bus, a common direct-current bus open winding power converter electrically connected with the direct-current bus, a direct-current bias vernier reluctance generator electrically connected with the common direct-current bus open winding power converter, and a control loop. The control loop comprises a voltage self-adaptive notch filter detection module, a 0-axis current self-adaptive notch filter controller, a current distribution module, a dq-axis current regulator, a rotary / static coordinate transformation module, a pulse width modulation module and a voltage / current signal processing module. The method has the effect of improving the bus voltage quality and the operation stability of a power generation loop.

The utility model relates to the technical field of circuit board processing, in particular to a current adjusting device for circuit board electroplating, which comprises an electroplating box, a portal frame is mounted in the middle of the top of the electroplating box, an electric cylinder is mounted in the middle of the top of the portal frame, and the output end of the electric cylinder is fixedly mounted in the middle of the top of a transverse plate. A rotating shaft is rotatably mounted on the side, away from the anode, of the transverse plate, a clamping assembly is arranged at the bottom of the rotating shaft, a conductive slip ring connected with the cathode of the current regulator is mounted at the top of the rotating shaft, a stirring shaft is rotatably mounted on the other side of the transverse plate, and a plurality of stirring rods are mounted below the outer side wall of the stirring shaft. The electric cylinder drives the transverse plate to ascend, the U-shaped plate can be driven to ascend, the U-shaped plate drives a circuit board to ascend to leave electroplating liquid in the electroplating box, when a worker takes the circuit board, fingers do not need to stretch into the electroplating liquid, and harm to the fingers is reduced.

A PFC controller for a PFC switching power supply is disclosed. The PFC controller includes a peak controller configured to receive a feedback signal that is indicative of input power provided to a downstream power converter. The peak current controller is configured to generate a first reference current signal, while a first multiplier generates a product signal by multiplying a reference sign with the first reference current signal. A second multiplier generates a second reference current based on the product signal and a voltage error signal. A current regulator generates a current regulation signal using the second reference current and a line current. A modulator is configured to regulate the output power produced by the PFC switching power supply using the current regulation signal.

The present application relates to the technical field of double three-phase permanent magnet synchronous motor harmonic current control, and discloses a double three-phase permanent magnet synchronous motor harmonic current control method and device, the present application is through to the motor voltage equation implementation modeling domain conversion and discretization processing, constructs the harmonic current loop controlled object of adaptation digitization control, complex vector current regulator and low pass filter discrete domain model, combines current signal multi-dimension pretreatment and accurate regulation transformation, fully compensates the delay of digital control, effectively offsets the influence of harmonic coupling and speed correlation. Compared with the prior art, the present application avoids the adaptive deviation of continuous domain design and digital control, solves the system instability problem caused by low pass filter delay and discretization error, and ensures that the motor has high harmonic current control precision and fast dynamic response in the full speed range.

The invention relates to a control unit (1) for controlling the operation of a three-phase electric machine (4), having a current regulator (2) which is designed to receive a three-phase target signal (iSoll) and a three-phase measurement signal (imess) and to generate and output a three-phase actuation signal (u) in accordance with the three-phase target signal (iSoll) and the three-phase measurement signal (imess) in order to control the three-phase electric machine (4) correspondingly. The control unit (1) comprises a PLL filter (5) designed to: receive, from one phase of the three-phase electric machine (4), a current value having a time-varying curve (iU) and a phase angle (phiel), and to rotate the current value by a predetermined phase angle to obtain a current value of the remaining phase; or receiving current values each having a time-varying curve (iU) and a phase angle (phiel) from two phases of the three-phase motor (4), and rotating one of the current values or a combined current value combined by the two current values by a predetermined phase angle to obtain a current value of the remaining phase; and outputting the obtained current value together with the received current value or the obtained current value together with the received current value as a three-phase measurement signal (imess).

The utility model provides a kind of lifting type water conservancy steel gate, it is related to steel gate field, comprising: gate frame, the gate frame inside slide connection has gate leaf, gate leaf upper end is connected with lifting rod, and the upper end of lifting rod is connected with hydraulic cylinder, the upper end of gate frame is equipped with oil tank, and installation cavity and oil storage cavity are set in the inside of oil tank, and installation cavity inside is equipped with controller and current regulator, and the inside of oil storage cavity is equipped with hydraulic oil, heating rod is simultaneously arranged in the inside of oil storage cavity, the outside of heating rod is connected with heat conduction plate, and the upper end of heating rod is electrically connected with current regulator by wire, the outside of oil tank is connected with hydraulic pump, and hydraulic pump is connected with hydraulic cylinder by oil pipe, and heat preservation cover is simultaneously wrapped in the outside of oil pipe and hydraulic cylinder, the front side of gate frame is connected with filter assembly. The utility model has the use effect of guaranteeing hydraulic cylinder in low temperature environment, and has the cleaning effect of filter plate without disassembly.

The invention discloses a flexible LED (light-emitting diode) lamp strip capable of actively deforming, which comprises a plurality of LEDs (2) arranged to emit light when current passes through; a flexible base band (3) arranged to receive a plurality of LEDs; at least one electrical conductor, which is provided for passing an electrical current through the LEDs and is located inside the strip between the base strip (3) and the protective coating; a pair of pads (4) of electrical conductors located at each end of the LED strip to easily connect the strip to a power supply or other LED strip; and an external power source for providing current. In particular, the flexible base strip (3) of the LED strip is provided with at least one series of holes (6) which are arranged outside the rows of LEDs and are parallel to the LEDs in the longitudinal direction. The holes (6) have any configuration, size and spacing from each other, are arranged along a straight line on the sides of the LEDs and allow at least a portion of the outside of the LEDs to be bendable to 90 DEG, thereby enabling the strip to enter a support channel (7) having a reduced cross-section with respect to the strip width. In addition, in the LED lamp strip, the electric conductors are arranged on the two sides, and a power line with the section far larger than that of a common lamp strip with the length being 3-4 mm is kept. Furthermore, an LED strip electronic component (5), such as a resistor, is provided for regulating the current flowing through the LEDs and ensuring correct operation, or a driver (current regulator) thereof, which can have variable shape, size and position on the flexible base strip (3), so that the position and configuration of said electronic component can be modified according to the settings to be achieved. When the individual LEDs are placed next to one another, the electronic component (5) is arranged outside the hole (6). The LED strip is arranged to be inserted in a linear or curvilinear configuration into the support channel (7) so as to enable a configuration of shapes with various configurations of different configurations, with different linear and / or curvilinear shapes.

The invention provides a hybrid module power flow transfer device and a power operation domain extension method, and belongs to the technical field of flexible power flow transfer of a middle-high voltage power distribution network. The device is formed by connecting an active module, a suspension module and a standby module in series. When running in a tidal current transfer mode, receiving a power instruction, generating a voltage reference through a power and current regulator, obtaining active voltage parallel to current and vertical reactive voltage according to current phase decomposition, enabling the active module to bear all the active voltage and bear part of reactive power in a limited manner, and enabling the residual reactive voltage to be provided by the suspension module; the standby module maintains the DC voltage through narrow pulses. When the active voltage is larger than the voltage boundary of the active module, an active operation domain expansion method based on active module overmodulation is provided, and a reverse harmonic voltage is generated through the suspension module to compensate harmonic waves caused by overmodulation, so that current height sine is realized. When the system fails, the IGBTs of all modules of the device are locked, and the anti-parallel diodes are connected in series with a line, so that rapid current limiting is realized.

The invention belongs to the technical field of wind generating sets, and particularly relates to a control method for a small vertical axis wind generating set. According to the technical scheme, the control method for the small vertical axis wind turbine generator set comprises the following steps that a rotating speed state space equation corresponding to the power grid frequency is calculated through the collected power grid frequency and the rotating speed of a wind turbine generator, and the optimal rotating speed target of the wind turbine generator set is calculated through an optimal parameter prediction method; and inputting the optimal rotating speed target into a wind turbine generator rotating speed controller, setting a PMW regulator of a power controller by taking the output of a current regulator as the input, and ensuring the stable operation of the generator during the power grid frequency fluctuation period. According to the control method for the vertical axis wind generating set, the power grid adaptability of the system is improved, and the risk of unnecessary shutdown is reduced.

The utility model relates to current regulation technical field discloses a kind of intelligent switch control device based on dynamic current regulation, including current regulator, the top of the current regulator left and right two sides front and back two ends are uniformly connected with sliding slot column, the inside of the sliding slot column is equipped with cavity, the inside of the sliding slot column is provided with limit board no. One, the top of the limit board no. Fixedly connected with sliding rod no. One, the outside of the sliding rod no. One is equipped with spring no. One, the top of the sliding slot column is fixedly connected with contraction column. In the utility model, when the top of current regulator is impacted and extruded, the anti-collision plate no. One is extruded, the anti-collision plate no. One extrudes sliding rod no. One, the spring no. One outside sliding rod no. One is deformed, under the deformation, the inside is slid down, and then the anti-collision plate no. One can slide and contract when subjected to external force.

The invention relates to an anti-load disturbance control system for main transmission of a rolling mill, which comprises a double-closed-loop control system and a load observer, and is characterized in that the double-closed-loop control system comprises a speed regulator, a torque current converter, a current regulator, a converter and a motor which are connected in sequence. The load observer calculates and outputs the comprehensive observation torque under load disturbance by collecting the actual rotating speed and the actual torque of the motor, the comprehensive observation torque serves as the additional given value of the dynamic torque and is superposed on the torque output by the speed regulator to jointly generate the torque, so that the electromagnetic torque of the motor is rapidly increased, the dynamic speed drop is reduced, and the recovery time is shortened. According to the anti-load disturbance control system for the main transmission of the rolling mill, the dynamic prompt drop of the motor can be effectively inhibited, the anti-load disturbance performance of the system is improved, and the product quality is ensured.

The invention discloses a permanent magnet synchronous motor rotor position deviation on-line compensation method and device. The method comprises the following steps: constructing a motor current discrete time prediction model considering a back electromotive force rotation effect, and designing a discrete time current regulator; constructing a decoupled estimation model based on a scattered time current regulator, and updating a parameter estimation value of the decoupled estimation model on line by adopting an adaptive law based on a hyperstability theory; deriving a discrete back electromotive force component in the discrete synchronous reference system through an integral average method; introducing a position deviation angle, and deducing the position deviation angle extracted from the discrete back electromotive force in combination with coordinate transformation and triangular synthesis; and feeding the position deviation angle into a low-pass filter to suppress high-frequency noise, and adding the position deviation angle with an original position signal of the rotor in a feedforward mode to obtain a compensated high-precision position signal of the rotor. The position deviation is extracted through the discrete time back electromotive force model, error accumulation of a continuous time model at a high rotating speed is avoided, and the compensation precision is remarkably improved.

An electrostatic chuck device includes an electrostatic chuck plate having a dielectric substrate with a wafer placement surface and an electrode inside the dielectric substrate, a focus ring disposed at an outer peripheral portion of the electrostatic chuck plate and surrounding the placement surface, and a power supply connection portion connecting the electrode and a power supply. The electrostatic chuck plate has a first electrode in a region overlapping the placement surface in plan view and a second electrode in a region overlapping the focus ring in plan view. The power supply connection portion includes a power supply wiring electrically connecting the first electrode and the second electrode via a current regulator.

The invention discloses a synchronous phase modifier and STATCOM multi-target coordination optimization control method in an HVDC system. The method comprises the following steps: establishing a synchronous phase modifier reactive power regulation system based on SNA-PID; the deviation of the alternating current bus voltage of the inverter station is used as an input quantity, and the ITAE, the maximum absolute error value and the minimum steady-state deviation absolute value of the alternating current bus voltage of the inverter station are used as optimization targets of multi-target coordinated optimization control; and an NSGA-II multi-target optimization algorithm is adopted to carry out multi-target coordinated optimization on synchronous phase modifier reactive power regulation optimization parameters based on SNA-PID and voltage and current PI regulator control parameters of the STATCOM, so that multi-target coordinated optimization control of the synchronous phase modifier and the STATCOM in the HVDC system is realized. According to the invention, the inverter station AC bus voltage drop caused by system faults and load access can be effectively reduced, the inverter station AC bus overvoltage caused by fault elimination and load disconnection can be effectively suppressed, the recovery time of the system bus voltage is reduced, the probability of commutation failure of the system is effectively reduced, and the reliability of the system is improved. And the system stability is improved.

This invention relates to the field of power electronics technology and provides a single-sensor control method and system for LCL-type grid-connected inverters. The method includes: transmitting the difference between the incoming grid current and a current reference to a current regulator to obtain the regulator's output; superimposing the incoming grid current onto the regulator's output in a positive feedback manner after passing it through a second-order digital filter to obtain a modulation signal; and generating a PCC voltage estimate based on the modulation signal and the incoming grid current through the superposition of two transfer functions, followed by obtaining the current reference through a phase-locked loop structure and trigonometric function calculations. The control structure is very simple, reducing the computational complexity of the control chip in practical applications.

The invention relates to the field of energy, specifically to distribution electrical networks operating with an isolated and compensated neutral, and is intended for selective relay protection of connections from single-phase ground faults (SGF) in 6-35 kV electrical networks. The method for relay protection of distribution electrical networks from single-phase ground faults involves the use of a grounding transformer, the power of which is determined by the magnitude of the total capacitive current in the network and the tripping current of the relay protection from single-phase ground faults. When a single-phase ground fault occurs, an RC damper generates an IORC signal for the device control unit, which opens a current regulator, passing current from the grounding transformer into the electrical network and regulating the current. The current regulator is opened by the IORC signal from the RC damper immediately upon the occurrence of a single-phase ground fault.In a power grid with a long-term single-phase ground fault, the inductive current from the grounding transformer is regulated by the device's control unit to the required current values ​​via a current regulator with a delay of at least 0.1 seconds from the moment the single-phase ground fault occurs. A relay protection device for distribution power grids against single-phase ground faults comprises a grounding transformer with a device control unit connected between the power grid and the ground, as well as a relay protection unit for single-phase ground fault connections, a current regulator with a control unit, an RC damper, and a triac current regulator. The advantages of the proposed invention include reliable and safe operation of power grids with high power supply efficiency and the potential for expanding the scope of application to 6-35 kV power grids.

This utility model relates to the field of rubber tapping knife technology, and particularly to a semi-automatic electric rubber tapping knife. It includes a housing and an operating structure disposed inside the housing. The operating structure includes a motor, which is fixed inside the housing. A core rod is provided at the power output end of the motor. A cooling fan is fitted onto the core rod. A heat dissipation angular contact ball is fitted onto the end of the core rod away from the motor. An eccentric counterweight is provided on the side of the heat dissipation angular contact ball away from the cooling fan. The beneficial effects of this utility model are: Compared with other electric rubber tapping knives, this semi-automatic electric rubber tapping knife has improved noise reduction through optimization; the bearing rotates without resistance; the spring rotates to lift and propel forward without retraction; the tail nut can connect to a telescopic rod, allowing for adjustment of the working length; the angular contact bearing acts as a cooling fan for air convection; the circular design of the current regulator facilitates adjustment; this electric rubber tapping knife is simple to operate and improves overall work efficiency.

The application discloses a weak magnetic and mode switching control method of a permanent magnet synchronous motor and relates to the technical field of motor control, which comprises the following steps: obtaining the d-axis voltage, q-axis voltage, d-axis current, q-axis current, DC bus voltage and maximum torque current angle of a permanent magnet synchronous motor stator; determining whether conditions one and two are met; when the conditions one and two are both met, switching the operation mode of the permanent magnet synchronous motor to a weak magnetic region single current regulator weak magnetic control mode based on voltage phase angle; when the conditions one and two are both not met, switching the operation mode of the permanent magnet synchronous motor to a constant torque region double current regulator control mode; when only one of the conditions one and two is met, keeping the current operation mode of the permanent magnet synchronous motor; thereby, the weak magnetic control based on voltage phase angle and the smooth switching of the weak magnetic region and the constant torque region can be realized, and the influence of weak magnetic region cross coupling can be avoided.

The application discloses a low-speed rotor position estimation method, device and system of an alternating current synchronous motor. The method steps of the application comprise: (1) injecting a rotating high-frequency voltage signal in an estimated synchronous rotating coordinate system to obtain a high-frequency current response in the estimated synchronous rotating coordinate system, calculating an amplitude expression thereof and observing rotor position information contained in the current amplitude; and (2) performing coordinate transformation on the high-frequency current response in the estimated synchronous rotating coordinate system, so that the amplitude expression of the transformed current contains a sine quantity of rotor position deviation information, combining a corresponding current amplitude extraction method to construct a phase-locked loop, and thus estimating the rotor position. Compared with an existing rotating high-frequency voltage injection method, the application can reduce rotor position estimation errors under influences of stator resistance, induced electromotive force, a filter, a PI current regulator and a digital control delay, and the method of the application can maintain high position estimation precision at different steady-state rotating speeds.

According to the parallel thyristor circuit and the rectifier, the branch current of the first thyristor and the branch current of the second thyristor are obtained through the adjustment input end of the regulator, the first refrigeration semiconductor and the second refrigeration semiconductor are adjusted and controlled based on the respective branch currents of the first thyristor and the second thyristor through the adjustment output end of the regulator connected to the first refrigeration semiconductor and the second refrigeration semiconductor, and then the thermal resistance of the first thyristor and the second thyristor is adjusted, so that the temperature imbalance of the first thyristor and the second thyristor is reduced, and then the balance of the branch currents of the first thyristor and the second thyristor is realized.