300results about "Starter details" patented technology

The invention relates to the technical field of self-adaptive starting, and discloses a self-adaptive starting method and system based on voltage and current monitoring, and the method comprises the steps that an MCU (Microprogrammed Control Unit) triggers an auxiliary silicon controlled rectifier and a main silicon controlled rectifier through preset starting logic to start a motor, and carries out the high-frequency sampling of current and voltage data in real time; once starting failure is detected, short-time voltage sequences and short-time current sequences before and after a failure occurrence point can be automatically captured and stored. Then, key features are extracted from the sequences, and failure causes are determined through decision tree model analysis. And based on the analysis result and the current retry times, the MCU outputs a corresponding retry strategy to ensure that the motor can be successfully started or enter a safety mode. Thus, the reliability of motor starting is improved, subsequent fault diagnosis is supported through detailed data recording, and the maintainability and safety of the system are greatly improved.

The invention relates to the technical field of motor current limiting, and discloses a cooling fan motor starting current limiting method, device and equipment, and the method comprises the steps: carrying out the starting power calculation of a radiator, and obtaining a drive power prediction value; rotor angle position detection and blade aerodynamic resistance calculation are carried out, and aerodynamic load distribution parameters of all phase change points are obtained; performing starting current limitation to obtain a current limitation control instruction; performing motor commutation time sequence control to obtain a basic commutation control signal, and meanwhile, monitoring a starting torque abnormal increment to obtain a reverse airflow recognition result; according to the method, the current limit value is increased in the emergency mode to accelerate the starting response, the current limit is reduced in the energy-saving mode to reduce the energy consumption, and the starting current phase difference compensation is carried out to obtain a reverse airflow compensation control parameter and fuse the reverse airflow compensation control parameter with the basic phase-change control signal to obtain a target phase-change control signal. And the intelligent balance between the starting performance and the energy efficiency is realized.

A system for providing inrush current limiting for induction motor starting. The system utilizes a pre-start controller to initialize operation of a controller including multiple switches for controlling the voltage delivered to a motor having multiple phases. The pre-start controller activates each switch and determines whether a phase current flowing through the switches satisfies a threshold current. The switches are deactivated a phase current satisfies the threshold current. The pre-start controller determines an activation order for each phase and orders phases having higher phase currents higher in the order than lower phase currents, and determines an activation timing. Based on whether the highest phase current is positive or negative, the pre-start controller then activates, using a voltage at a corresponding angle and based on the activation order and activation timing, the phases to de-saturate the flux generated by the phase currents, thereby limiting an inrush current provided to the motor.

The invention provides a motor control method and a vehicle, and relates to the technical field of motor control. According to the method, a current Hall signal of a Hall sensor is obtained, and whether the Hall sensor is in a fault state is determined; if the Hall sensor is not in the fault state, whether the motor is controlled to work based on the current Hall signal is determined according to first system time corresponding to the current Hall signal and the signal state of the current Hall signal; if the Hall sensor is in the fault state, updating the Hall signal invalid count value, and determining whether to control the control system of the motor to restart or not based on the updated Hall signal invalid count value and the first preset threshold value, thereby avoiding the problems of control errors and frequent error protection.

The invention discloses an intelligent start-stop control method and system for a magnetic suspension refrigeration compressor, and the method comprises the steps: obtaining a position perception enhancement source through collecting and analyzing the current response data of a magnetic bearing coil, and extracting the current response change characteristics; rotor position estimation is carried out based on current response change characteristics, a positioning precision driving source is extracted from estimation deviation, and a non-impact starting excitation current instruction is generated; a multi-sensor fusion data network is established, configuration is reconstructed through an abnormal response activation signal, and a degradation operation fault-tolerant mode is formed; converting a response preparation gain according to the shutdown instruction signal, performing shutdown state evaluation in combination with signal reconstruction configuration, and generating an emergency shutdown trigger condition; and the power supply state of a bus capacitor is detected, gradient control potential is released, the active damping control opportunity is determined, a damping force control instruction is generated, finally intelligent start-stop control over the magnetic suspension refrigeration compressor is achieved, and safe and reliable operation of the system under various working conditions is ensured.

The invention belongs to the technical field of soft starter control, and particularly provides a soft starter control method and system based on dynamic threshold correction and current change prediction, and the method comprises the steps: data collection: collecting the collected data, including the environment temperature, the input current collection and the operation duration of a soft starter; data cleaning and preprocessing; establishing a temperature-time-current threshold correction relation; a soft starter state classification model is constructed based on the long-short-term memory network and used for perfecting the temperature-time-current threshold correction relation constructed in the third step and outputting the soft starter state; soft starter state classification model training optimization and evaluation; and using the trained soft starter state classification model to carry out soft starter operation state discrimination. The method and the system are combined with multi-dimensional data such as temperature and time, a current protection threshold is dynamically adjusted, and the problem that a traditional static constant value is poor in adaptability is solved.

The invention relates to the technical field of motor driving control, and discloses a motor driving method with low delay response. The method comprises the steps of collecting real-time operation parameters such as motor speed data, position data and current data, determining a low-delay control model based on the parameters, generating a dynamic adjustment instruction by using the model and applying the dynamic adjustment instruction to a motor driving system, and executing feedback calibration operation according to motor response data so as to update the model. Parameters are collected in real time, and an adaptive control model is constructed, so that a control instruction can be changed along with the running state of the motor, and the lag of an intermediate link is reduced; the dynamic adjustment instruction directly acts on the driving system, and the response speed is increased; the feedback calibration criterion compensates performance drift through continuously optimizing the model, and ensures that the motor keeps stable dynamic performance under different working conditions. The method can enhance the response capability of the motor in the scenes of load sudden change, speed switching and the like, improve the synchronism of multi-motor cooperation, reduce mechanical wear, and is suitable for various motor types and application scenes.

A control circuit of a timepiece motor (2), including a bipolar permanent magnet (6), a stator (4) defining two isthmi (12a &12b) and two rest positions for the rotor, and a coil (18) mounted on the stator. The control circuit can determine the position of the rotor at rest. An electric pulse generator (22) for detecting an external magnetic field formed by a circuits for: measuring the electrical current in the coil after an electrical pulse has been triggered, comparing the measured electrical current with a reference current, measuring the time allowing measuring a rise time between triggering of the electrical pulse and the next time the electrical current flowing in the coil reaches the reference current, and processing the rise time to be able to determine whether the measured rise time indicates the presence of a given external magnetic field passing through the two isthmi.

According to the rotor starting control method of the magnetic drive conveying system and the related equipment, the magnetic drive conveying system comprises a magnetic drive conveying track and rotors, the rotors run on the magnetic drive conveying track, and the method comprises the steps that starting requests for at least two starting rotors in the multiple rotors are responded; starting control is conducted on the front-sequence rotor, real-time state information in the magnetic drive conveying system after the front-sequence rotor is started is obtained, the front-sequence rotor is one of the at least two starting rotors, and the real-time state information is used for representing electrical parameters of a power load in the magnetic drive conveying system; based on the real-time state information, an asynchronous control strategy of a subsequent rotor is generated, and the subsequent rotor is a starting rotor after the previous rotor; on the basis of an asynchronous control strategy, starting control is carried out on a subsequent rotor, the situations that the rotor fails to start due to insufficient torque, a control system operates mistakenly due to unstable voltage, and equipment is shut down due to overload protection are prevented, and the operation safety of the magnetic drive conveying system is remarkably improved.

The invention relates to a double-fed asynchronous motor debugging method and system based on a back-to-back converter, and belongs to the technical field of motor control. Comprising the following steps: supplying power to a three-phase alternating-current voltage regulator, and charging a direct-current bus capacitor by connecting a grid-side alternating-current contactor with a buffer resistor in parallel; when the DC bus capacitor is charged to a preset amplitude, the digital signal processor sends a closing signal to the AC contactor; after the alternating current contactor is switched on, pure open-loop debugging, current closed-loop debugging and rotating speed closed-loop debugging are respectively carried out on the rotor side; the upper computer controls the pulse width modulator to work, carries out excitation on the rotor, and monitors the voltage and phase of the stator end; when the voltage rises to a preset value and the phase is synchronized with the power grid, a closing signal is sent to the AC contactor at the stator side, and the motor stator is connected to the power grid. The problems that a traditional doubly-fed asynchronous motor is too large in starting current and complex in control link decoupling are solved, and the debugging reliability and efficiency are improved. In addition, debugging does not depend on additional prime mover dragging.

Embodiments of the present application disclose an intelligent electric power tool and a control method thereof. The intelligent electric power tool comprises: a motor; a power switch, which outputs a switch signal to control the power-on state of the motor; a detection unit, which is configured to detect the running parameters of the motor in real time; and a controller, which is electrically connected to at least the motor and the detection unit. The controller is configured to: when a power-off signal of the power switch is detected, acquire the running parameters of the motor; set the brake time of the intelligent electric power tool according to the running parameters, and control the motor to reduce the rotating speed within the brake time in response to the power-off signal. The intelligent electric power tool can solve the problems of the prior art, such as long brake time, slow start response speed and poor brake stability in the process of frequent on-off, so that the brake time of the intelligent electric power tool is automatically adjusted according to the real-time running parameters of the motor during the working process, the fast start is realized while the brake stability is ensured, the response speed of the intelligent electric power tool in the process of frequent on-off is improved, and the working efficiency is improved.

The utility model discloses a control system for soft start of a motor in the papermaking industry, which comprises a soft starter RQ, a terminal 7 and a terminal 10 of the soft starter RQ are in short circuit, a terminal 8 and a terminal 9 of the soft starter RQ are in short circuit, the terminal 8 and the terminal 9 of the soft starter RQ are both connected with one end of a normally open contact of a relay KA, and the other end of the normally open contact of the relay KA is connected with the terminal 7 and the terminal 10; and the terminals L11, L12 and L13 of the soft starter RQ are connected with one end of a contact of a contactor 2KM, and the other end of the contact of the contactor 2KM is connected with a motor M. The soft starter has the following advantages that the motor can continuously operate under the condition that the soft starter misreports a fault, and after the fault is misreported, the motor can still continuously operate and has circuit break protection, so that the condition that components are damaged cannot occur.

A compressor PTC starter belongs to the technical field of motor starting devices. It includes a housing and a housing cover; a thyristor (SCR) with its lower part disposed in the housing cavity and its upper part inserted into the housing cover cavity; a first PTC starting mechanism, a second PTC starting mechanism, and an S-connector disposed within the housing cavity. The first PTC starting mechanism includes a flat cylindrical first PTC, and the second PTC starting mechanism includes a cylindrical second PTC. The first and second PTC starting mechanisms are electrically connected to each other through the first PTC. The key feature is that the first PTC is horizontally positioned at the bottom of the housing cavity with its downward-facing side as a positioning support and its upward-facing side as an elastic clamp, and is subjected to contact pressure from the housing cover on the upward-facing side. The second PTC is longitudinally inserted into the housing cavity. Advantages: excellent stability; reduced steady-state power consumption for energy saving; improved operational reliability and service life; quick and convenient installation; no installation-related malfunctions.

The invention provides a motor operation management system, and the system comprises the steps: converting an AC power supply into a target DC power supply after a switching power supply is started, and inputting the target DC power supply into a control case, so as to supply power to the control case; when the target direct-current power supply exceeds a preset voltage upper limit value, the energy release module releases the target direct-current power supply output by the switching power supply; when the actual motion trail of the target motor exceeds a given error window, the control case cuts off power supply driving of the target motor through the driving output switch and connects the braking module to the target motor, so that a three-phase winding of the target motor is short-circuited, and the target motor is stopped through acting force which is generated by short circuit and is opposite to the motion direction of the motor. According to the invention, energy release is started when the output of the switching power supply exceeds the expectation, the disturbance of motor motion to the voltage of the switching power supply can be effectively reduced, and the motor can be efficiently and rapidly stopped by performing three-phase short circuit on the motor in the out-of-control state of the motor.

The present invention relates to a method for starting a BLDC motor (10) with a trapezoidal shaped induction voltage under high load conditions using a modified two-level discrete fixed-time or fixed-frequency hysteresis current controller, the BLDC motor (10) being driven by an inverter bridge (30) with only one current sensor (20) placed on the busbar and controlled by a processing unit associated with an analog-to-digital converter, the novelty of which consists essentially in the fact that the intensity of the current (Im) of the BLDC motor is controlled by a two-level discrete fixed-time or fixed-frequency hysteresis current controller.

The invention relates to the technical field of motor adjustment, in particular to a motor starting control adjustment method and system.The motor starting control adjustment method comprises the steps that motor operation parameters are obtained in real time, a real-time load torque estimation value is estimated, and then dynamic starting voltage adjustment and self-adaptive starting time optimization are synchronously executed based on the estimation value; the optimal starting voltage is quickly determined by querying the mapping relation in voltage regulation, and it is ensured that the output torque accurately matches the load requirement; in time optimization, the starting duration is dynamically adjusted according to the instantaneous change rate of a real-time load torque estimation value so as to adapt to different working conditions; and finally, a comprehensive control instruction is generated in combination with the change trend of the real-time load torque estimated value, so that the voltage and the time parameters are coordinated and matched, and the beneficial effects of smooth starting process, energy efficiency improvement and reliability enhancement are jointly realized.

The utility model provides a soft starter with high safety, comprising a housing and a panel, the housing is provided with an input pin and an output pin, the housing is internally provided with a heat radiation assembly, a circuit board and a silicon controlled rectifier, the input pin and the output pin are connected with the silicon controlled rectifier, the heat radiation assembly comprises two side heat radiation members clamping the silicon controlled rectifier, and the circuit board is connected with the circuit board. Positioning bosses are arranged between the other sides, opposite to the panel, of the heat dissipation assemblies and the inner wall of the shell, mounting holes are formed in the positions, corresponding to the positioning bosses, of the shell, the heat dissipation assemblies are detachably connected with the positioning bosses and the shell through fastening assemblies, and an insulating plate is inserted between the heat dissipation assemblies. By the adoption of the technical scheme, the overall structure is more compact, the size is reduced, meanwhile, due to the fact that the distance is small, fixing of the insulating plates is facilitated, installation is convenient, the application range is wider, standardized batch production of shells is facilitated, production cost is reduced, rapid assembling is convenient, assembling efficiency is improved, frequent starting can be achieved, overheating cannot be caused, and safety is higher.

The invention relates to the technical field of motor control, and discloses an anti-locked-rotor starting control system. The system comprises a main control module, a dynamic rule base generation module, a phase compensation module, a pre-triggering module and a feedback correction module. The main control module monitors a three-phase current waveform and a rotor position signal of the motor and generates an instantaneous locked-rotor feature vector; the dynamic rule base generation module extracts a current waveform distortion mode of a historical locked-rotor event, and combines a rotor inertia parameter to construct a fuzzy rule set so as to initialize a dynamic rule base; the phase compensation module dynamically compensates the phase current waveform and constructs a stability evaluation function; the pre-triggering module triggers pre-access of the standby power supply according to the phase offset and verifies compatibility; and the feedback correction module generates a feedback parameter according to the locked-rotor risk index and the power supply verification result, and corrects the mapping relationship between the feature vector and the rule base. The system can accurately identify locked-rotor characteristics, dynamically adapt to operation parameters, actively prevent and control locked-rotor risks, and improve the starting stability of the motor.

The utility model discloses a soft starter with a voltage regulator self-inspection function, which performs static detection and trigger detection on a thyristor before being put into use, eliminates the existing potential problems of the thyristor before equipment is put into operation, and prevents the whole motor system from being influenced by faults of the soft starter in the operation process. Production interruption or power grid impact can be effectively prevented; and meanwhile, the detection core circuit is reused, and the state detection of a plurality of groups of anti-parallel thyristors can be realized only by arranging one set of detection circuit, so that the hardware cost of the soft starter is greatly reduced. According to the technical scheme, the soft starter with the self-checking function of the voltage regulator multiplexes the drive circuit through the channel selection switch, and realizes the self-checking function of the thyristor with industrial-grade reliability under the condition of limited hardware cost.

The invention relates to the field of signal processing, and particularly discloses a roller-based motor smooth driving method and device, a vehicle and a medium, and the method comprises the steps: in response to a detected roller rolling action, determining a current rolling signal type corresponding to the roller rolling action, and determining a historical rolling signal type output at a previous moment; by comparing the type of the current rolling signal with the type of the historical rolling signal, continuously outputting the current rolling signal in different duration until all duration ends or the rolling action of the roller is detected again; and controlling the driving voltage or the driving rotating speed of the motor to be increased from the initial value to the target value based on the output rolling signal within the duration. By comparing the current rolling signal type with the historical rolling signal type, the current rolling signal is output within different duration, and the initial rolling signal of the roller can be filtered, so that the insensitivity and pause of the roller adjusting process in the prior art are avoided.

The invention provides a control method. The control method comprises the following steps: controlling a motor to start based on a rotating speed-current serial double closed-loop mode; and when the driving force and the loading force of the motor are balanced, switching to control the motor to work based on a pressure-current series-connection type double closed-loop mode or a position-current series-connection type double closed-loop mode. According to the configuration, on one hand, different control modes are used in different stages, and the overall complexity of the control scheme is reduced; on the other hand, the logic of the switching control sub-schemes is modified, so that the switching opportunity between the two control sub-schemes is more reasonable; the problem that in the prior art, the whole control scheme is complex or the switching opportunity of the control sub-schemes is unreasonable is solved. In one embodiment of the invention, when the difference value between the driving force and the load force is small, the output amplitude limiting of the current inner loop is triggered, and the stability during dynamic switching can be further improved.

This application provides a motor controller, a powertrain, and an electric vehicle, to resolve a problem of current impact on a power transistor that exists during startup of the motor controller and therefore improve powertrain efficiency and vehicle endurance. The motor controller provided in this application includes a control apparatus and an inverter circuit. The control apparatus is configured to receive a first torque signal, at least one second torque signal, and a third torque signal in sequence. In response to the third torque signal, the control apparatus outputs a startup signal and a third control signal in sequence. The startup signal is used to control the inverter circuit to generate a startup voltage, to avoid current impact that exists when the power transistor is turned on. The inverter circuit receives the third control signal and controls an induction motor to output a torque based on a torque value indicated by the third torque signal . According to the motor controller, the powertrain, and the electric vehicle provided in embodiments of this application, a startup speed of the motor controller can be increased, and current impact that exists during startup of the motor controller can be eliminated.

Embodiments of the present disclosure relate to soft turn-off for motor controllers. A bidirectional switch for an induction motor is described. The bidirectional switch can include a first power semiconductor transistor having a first source, a first drain, and a first gate. The bidirectional switch can also include a second power semiconductor transistor having a second source, a second drain, and a second gate. The bidirectional switch can include the second source connected to the first source. The bidirectional switch can include a soft start device including a control circuit configurable to provide a first control signal to the first power semiconductor transistor and a second control signal to the second power semiconductor transistor.

The application relates to the technical field of high-voltage starting cabinets, and discloses a high-voltage solid-state soft starting cabinet, which comprises a starting cabinet case, wherein an electronic component mounting area is arranged, and two wind control mechanisms, namely a wind control mechanism one and a wind control mechanism two, which are the same in structure but opposite in function, are arranged on the two sides of the area; each air inlet is subdivided into an air burst port and an air suction port; the air fan drives the air in the starting cabinet case to be discharged through the air suction port; a gas breaking piston is arranged in the air burst port; when the air flow rate in the air suction port is below a preset value, a control mechanism is activated to pull the gas breaking piston through reciprocating movement, so that the high-pressure gas is intermittently sprayed out of the air burst port along the path of the corresponding air suction port; the two wind control mechanisms, namely the wind control mechanism one and the wind control mechanism two, are ingeniously combined, the two wind control mechanisms are the same in structure but opposite in function, and are respectively responsible for air suction and air exhaust operations in opposite directions.

A solid-state controller for limiting startup current in an induction motor is provided. The solid-state controller includes a first comparator configured to generate a first comparison based on comparing a rotor speed of the induction motor with a rotor speed threshold. The solid-state controller includes a phase current limiter configured to generate a startup current limit based on the comparison received from the first comparator. The solid-state controller includes a second comparator configured to generate a second comparison based on comparing a startup current of the induction motor with the startup current limit. The solid-state controller includes a microprocessor configured to generate a firing phase angle based on the second comparison, where the firing phase angle is a phase angle at which the solid-state controller is turned on, and generate a stopping time at which the solid-state controller is turned off.

A method for controlling an induction motor and an electric power converter, the electric power converter (20) comprising means configured to receive an indication from a second electric power converter (30), the indication indicating that the second electric power converter (30) has stopped controlling an induction motor (60), means configured to determine an estimate of a rotating magnetic flux of the induction motor (60), wherein the determining is at least initiated in response to receiving the indication and means configured to start to control the induction motor (60) by the electric power converter (20) based on the determined estimate of the rotating magnetic flux of the induction motor (60).

The invention relates to the technical field of starters, and relates to an electronic starter and a control method thereof, and the electronic starter comprises an electronic switching circuit which is used for controlling the on-off of the current of a secondary winding of a motor; the trigger circuit comprises a rectifier bridge, a first triode, a second triode and an MOS tube; and the bias circuit is connected with the base electrode of the first triode, and the bias circuit is used for transmitting bias current to the base electrode of the first triode. According to the invention, the working current of the electronic starter after the motor is started is limited at a microampere level through the resistor with a relatively large resistance value, so that the energy consumption of the electronic starter during the normal operation period of the motor is obviously reduced.

The invention provides a soft start device multi-parameter cooperative control system based on intelligent sensing, and relates to the technical field of multi-parameter cooperation, and the control system comprises a multi-data collection module which is used for collecting various data. And the self-assembly fusion strategy module is used for setting starting parameters according to the motor state data, fusing various parameter data to obtain multi-parameter fusion data, and analyzing the multi-parameter fusion data to obtain a control strategy. And the parameter adjustment balance module is used for extracting abnormal working condition processing data from the historical working condition data and adjusting the control strategy according to the abnormal working condition processing data to obtain a balance control instruction. And the parameter stable start control module is used for adjusting the start initial data according to the start parameter to obtain a device start parameter, and controlling multiple parameters of the soft start device according to the balance control instruction. According to the method, the control instruction is balanced, so that the system can quickly take treatment measures when an accident occurs, the risk of equipment damage is reduced, and the response capability of the system to abnormal working conditions and the fault treatment efficiency are enhanced.

This invention relates to a power tool and a motor control method for the power tool. When the handle is in the working position area and locked relative to the main unit, a signal unit feeds back a first state signal; when the handle is in the non-working position area, the signal unit feeds back a second state signal. Upon receiving the first state signal, the control unit controls the motor to start according to a first control logic; upon receiving the second state signal, the control unit controls the motor to start according to a second control logic, which is different from the first control logic. Thus, when the handle is in the non-working position area, different starting logics are used to control the motor startup, reducing the probability of accidental start-up of the power tool due to accidental triggering of the switch assembly, reducing user risk, and improving the safety of the power tool.