64 results about "Motor soft starter" patented technology

The invention relates to a soft starter of low-voltage motor and high-voltage motor consisting of a three-phase rectifying bridge and relating to the non-impact current starting and speed control of an AC motor, wherein a motor stator three-phase winding is connected with the AC side of a three-phase fully-controlled rectifying bridge, while the DC side of the rectifying bridge is communicated by a conducting wire, thereby forming a low-voltage soft starter; the low-voltage AC exciting coil of a three-phase saturable reactor is connected with the AC side of the three-phase fully-controlled rectifying bridge, while the DC side of the rectifying bridge is communicated by a conducting wire and a high-voltage motor stator three-phase winding is connected in series with the high-voltage coil of the saturable reactor, thereby forming a high-voltage motor soft starter. The high voltage / low voltage soft starter has a full-voltage electromagnetic switch capable of charged attracting when a motor starts; when starting is finished, the electromagnetic switch is capable of powerdown release to ensure full-voltage operation of the motor; moreover, when adopting the 'one-drive-N' proposal, the soft starter needs to be equipped with N motor circuit breakers but omits N+1 electromagnetic switches as compared with the prior soft starter.

The present invention discloses a current amplitude limiting control method applied to the voltage ramp control mode of a solid-state soft starter. The method is characterized in that current limiting control is adopted under a voltage ramp control mode in the start control of a thyristor control-based solid-state soft starter. According to the method, under the voltage ramp control mode, when a current effective value is smaller than a current amplitude limiting set value, voltage boost control is carried out according to the voltage ramp control mode; when the current effective value is larger than the current amplitude limiting set value, the control method shifts to a current amplitude limiting work mode so as to limit the boost action of voltage; and the switching of the current amplitude limiting work mode is performed according to a method in which hysteresis comparison is set according to the effective value of present instantaneous operating current. With the method of the invention adopted, current amplitude limiting control is implemented when current exceeds a dangerous threshold value under a condition that voltage control can be substantially completed according set voltage boost time and voltage drop time. With the control method adopted, the safety and reliability of a thyristor control-based motor soft starter can be greatly improved.

The invention discloses a soft starter for mesolow and high voltage motors, which consists of three phase bridges. The invention relates to starting control without impact of middle, low and high voltage alternating current motors. The soft starter takes a thyristor three-phase full-control rectifier bridge which works based on short circuit at the direct current side as an AC voltage regulator, the stator winding of a motor is connected in the AC loop of the rectifier bridge, and the mesolow (220-380-660V) motor can achieve 'one drives N' soft starting by phase control; the low-voltage coil of an isolation transformer is connected in the AC loop of the rectifier bridge, the stator of the motor is connected with the high-voltage coil in series, and the high voltage (3-6-10KV) motor can achieve 'one drive N' soft starting by phase control. A plurality of groups of low-voltage coils are arranged and a plurality of sets of rectifier bridges are adopted, thus forming a high voltage 'multiplex' soft starter, so that the problem that the high-power mechanical and electrical transmission system can be started under control.

The invention relates to a frequency converter and soft starter comprehensive experimental device, which comprises a three-phase power supply, a circuit breaker, a voltage regulator, a frequency converter, a soft starter, a motor, a direct current generator, a resistor, an energy consumption resistor, a control terminal and a bypass alternating current contactor, wherein the three-phase power supply is connected with the circuit breaker; the circuit breaker is connected with the voltage regulator; the voltage regulator is connected with the frequency converter and the soft starter respectively; the frequency converter and the soft starter are connected with the motor; the motor is connected with the direct current generator; the direct current generator is connected with the resistor; the frequency converter is connected with the energy consumption resistor; the soft starter is connected with the control terminal and the bypass alternating current contactor respectively; and the motor is connected with the bypass alternating current contactor. Compared with the prior art, the frequency converter and soft starter comprehensive experimental device has the advantages of avoiding using various devices for doing all tests and saving floor area occupation and funds.

The invention relates to an asynchronous motor soft starter based on a single-chip microcomputer. The asynchronous motor soft starter comprises a main loop and a control loop, wherein the main loop and the control loop are connected with a three-phase power supply; the main loop consists of three groups of anti-parallel thyristors, a bypass contactor and a current transformer; the control loop consists of the single-chip microcomputer, a power supply circuit connected with the single-chip microcomputer, a voltage synchronization signal detection circuit, a pulse trigger circuit for generating a thyristor gate trigger signal, a current detection circuit, a voltage detection circuit, an LCD (Liquid Crystal Display) display and keyboard circuit, a contactor control circuit, a state output circuit and a protection circuit; the single-chip microcomputer is connected with the three groups of anti-parallel thyristors through the pulse trigger circuit; the current transformer is connected with the current detection circuit and a three-phase asynchronous motor. The asynchronous motor soft starter is convenient and easy to operate, and can run stably and reliably in time according to the change of motor load on the premise of meeting the starting torque requirement and reducing the starting current of the asynchronous motor.

The invention discloses a dining-assisting robot. The dining-assisting robot comprises a table board, a base, a base end cover, thrust bearings, roller bearings, a sleeve pipe, a step shaft, a shaft sleeve, a main arm shell, round shaft roller bearings, a main speed reducer, a main stepping motor, a main bevel gear, a joint shell, an auxiliary bevel gear, an arm joint, an auxiliary arm shell, an auxiliary stepping motor, a main key, an auxiliary speed reducer, screws, a reset key, a small joint, a clamping groove, a bottom motor, a pedal, an alternating current contactor, a motor soft starter,a buckle column, a screw rod and a cutter. The dining-assisting robot automatically identifies a human face, determines the space coordinates of the mouth part, and controls a mechanical hand throughthe method of converting pixel points into coordinate points, so that tableware can be automatically replaced, the variety of food taken by the dining-assisting robot is enriched, omni-directional operation can be realized in the working range of the mechanical hand, emergency situation can be effectively prevented, with the motors arranged in an arm, the structure is more reasonable, human-computer interaction performance is high, and the structure is simple and easy to realize.

An AC-AC power converter, such as a motor soft starter, includes an input connectable to an AC source with a disconnect switch, an output connectable to an AC load, and phase lines connecting the input and output to transmit power. In-line solid-state switching blocks are connected between line terminals and load terminals of the AC source and AC load, respectively, such that each phase line includes a solid-state switching block connected thereto. Free-wheeling solid-state switching blocks are connected to the load terminals at one end and together at a common connection at another end, such that each phase line includes a free-wheeling solid-state switching block connected thereto. Each of the in-line and free-wheeling solid-state switching blocks comprises a bi-directional switching block that selectively controls current and withstands voltage in both directions. The switching blocks also provide soft-starter functions, variable speed control, and integrated circuit breaker protection capability.

The invention discloses a brushless joint-control motor soft starter used for a wound-type alternating-current asynchronous motor. Compared with the conventional brushless self-control soft starter, the brushless joint-control motor soft starter has the characteristics that: the joint sequence control of a water resistor, a shorting switch and a safety exhaust valve avoids a liquid spray phenomenon; 2, the water resistor adopts a graphite pole plate and is contacted before the shorting circuit, so that the electro erosion of the pole plate of the water resistor is reduced, the phenomenon of the fusion welding of a moving contact and a fixed contact of the shorting switch is avoided; 3, the on and off states of the shorting switch are controlled by two units respectively, so that the jumping phenomenon of the moving contact and the fixed contact is avoided, and the contact pressure of the contacts is improved; 4, the contact time of the shorting circuit and the water resistor can be conveniently regulated after leaving a factory, so that the adaptability is improved; 5, a safety valve and an exhaust valve are integrated and are linked with the shorting switch, so that the number of seal surfaces is reduced and the starter is convenient to maintain; and 6, according to different users, different implementation modes can be adopted, and the manufacturing cost is reduced.

The invention discloses a fuzzy control strategy-based asynchronous motor soft starter. The soft starter comprises a central processing unit (CPU), a three-phase power supply, a power supply module, a keyboard module and a display module, wherein the three-phase power supply is connected with the CPU through a current detection module and an analog / digital (A / D) conversion module. The soft starter is characterized by also comprising a joint test action group (JTAG) simulation debugging module, a thyristor conduction angle measuring circuit and a thyristor driving voltage regulating circuit connected with the CPU, wherein the thyristor driving voltage regulating circuit is connected with a motor. The fuzzy control strategy-based asynchronous motor soft starter can simultaneously provide two start modes for a user to select, and in the two start modes, the thyristor trigger angle is calculated by adopting a fuzzy control table. Compared with the traditional thyristor soft starter, the fuzzy control strategy-based asynchronous motor soft starter has the advantages of strong interference resistance, high control speed, high robustness, strong adaptability and the like.

The invention relates to a network type all-digital motor soft starter which is characterized in that a control module structure combining a micro-programmed control unit (MCU) and a complex programmable logic device (CPLD) is adopted and is respectively connected with a voltage detection module, a current detection module, a trigger driving module, a keyboard display module and a network communication module so as to form the network type all-digital motor soft starter. The network type all-digital motor soft starter leads a voltage signal and a current signal to be converted into a digital signal and a logic signal so as to realize the functions of all-digital phase compensation, digital phase shift (with the phase shift accuracy of 0.05 degree), phase loss protection, automatic detection of phase sequence, overload protection, wide pulse or double-narrow-pulse trigger and the like, and ensures a motor to be more stably and reliably started and stopped, thus protecting a power grid, the motor and load equipment. Furthermore, the network communication module can be used for networking, so that remote monitoring can be realized. A circuit is simple in structure, high in integration level, phase control accuracy and reliability, good in stability and high in cost performance.

The invention relates to an asynchronous motor soft starter and a control method thereof. The value of an actual current signal and a maximum current value permitted by a preset motor are compared through a current detection circuit, the comparison information is outputted to a controller, a control signal is outputted through operation processing, a synchronization voltage signal and a control signal acquired by a voltage zero cross detection circuit from a power grid line voltage are inputted to a six-path triggering pulse generator for generateing triggering pulse, a motor input voltage is controlled in real time through triggering pulse control on a three-phase thyristor voltage regulation circuit, so a start current of a motor is controlled in real time, and the motor is made to realize stable start. The method is advantaged in that 1, relatively good control quality is realized, and excellent anti-interference capability and high-speed high-precision control especially in the severe environment are realized; and 2, the active-disturbance-rejection control technology is utilized, small overshooting and the short transition process are realized, adaptation to change of an object model and the surrounding environment can be realized in a relatively large scope, control quality of a controller is not influenced, and excellent robustness is realized.

The invention discloses a winding device of an inductor. The winding device comprises a rack, a winding wheel, a wire clamp, a framework motor, a winding motor, a programmable logic controller (PLC), a tension sensor, a first temperature sensor, an alarm circuit, a motor driver and a motor soft starter. The invention discloses a winding compensation method of the inductor. The winding compensation method comprises the steps of 1, initial setting; 2, measurement; 3, tension comparison; 4, acceleration compensation of the winding motor; and 5, speed reduction of the winding motor. The winding device is simple in structure and reasonable in design, a tension force of the winding wheel is detected by the tension sensor and is transferred to the PLC, the PLC is used for compensating a rotational speed of the winding motor according to a current rotor temperature of the winding motor, an effect of protecting the winding motor is achieved, and the winding device is high in automation, high in practicability and good in application effect, and is convenient to use and operate, and promotion and application are convenient.

The invention provides a microgrid-simulation variable-power asynchronous motor load experiment platform and belongs to the technical field of motors. The microgrid-simulation variable-power asynchronous motor load experiment platform comprises a motor twin trawling platform, a master control cabinet and a resistor cabinet with an adjustable resistance value, wherein the motor twin trawling platform comprises an asynchronous motor, a synchronous power generator and a coupling; the master control cabinet comprises a PLC (Programmable Logic Controller), a touch screen, a dragging motor soft starter and a power quality testing instrument. According to the microgrid-simulation variable-power asynchronous motor load experiment platform, load power can be set through the PLC based on simulating no-load and load operation of the asynchronous motor, the microgrid-simulation variable-power asynchronous motor load experiment platform is simple in structure, good in stability and reliability and convenient to use, avoids complex operation procedures like a machine set, can achieve soft start in zero torque (zero rotation speed), completely avoids impact of machine set start to a power grid, solves load operation only by adjusting resistance through controlling the touch screen, is very convenient to use and keeps very high stability in whole journey rotation speed (even zero rotation speed) and torque range.

The invention relates to a motor soft starter, in particular to a maintenance-free motor soft starter with self-checking function. The invention is characterized in that the maintenance-free motor soft starter with self-checking function has self-checking function and maintenance-free function. The maintenance-free function employs controlled silicon which is electronic apparatus without contacts. The benefit of the invention is that the controlled silicon is electronic apparatus without contacts, thereby requiring no frequent maintenance to conducting liquid, parts and the like; therefore, mechanical life is changed into service life of electronic element, thereby requiring no downtime maintenance after continuous operation for many years. When installing, the maintenance-free motor soft starter with self-checking function can be put into operation only after connection with power-supply wire and motor wire. Mechanical and electrical tests can be done to the entire system by using low voltage. Therefore, the motor soft starter with self-checking function has self-checking, self-learning and automatically set-up start-parameter functions.

The invention discloses an intelligent motor soft starter which comprises a base and an upper cover. A liquid crystal display and an operation button are arranged on the top wall of the upper cover. The intelligent motor soft starter is characterized in that the starter further comprises a front junction device and a rear junction device which are arranged at the front and rear ends of the base respectively, the front junction device and the rear junction device are provided with a plurality of terminal block components and partition boards, the partition boards are used for insulating and isolating the terminal block components, accommodating holes matched with the front junction device and the rear junction device are arranged on the base and the wall bodies of the front and rear ends of the upper cover, and the front junction device and the rear junction device are fixed on the base or the upper cover in a snapping or a bolt connecting mode. The intelligent motor soft starter has the advantages that the structure is reasonable and compact and the performance is stable and reliable.

The invention relates to an energy-saving hydraulic system and an automatic control system thereof, and belongs to the hydraulic technical field. The energy-saving hydraulic system comprises a hydraulic system body and the control system. The hydraulic system body is composed of an oil tank, an efficient and energy saving motor, a constant-power electric control proportional variable pump, a cartridge valve set and a hydraulic oil cylinder or a hydraulic motor. The control system is composed of a computer, a communication module, a touch screen, a power module, a CPU module, an input and output module, a relay module, a proportional amplifier, a displacement sensor and a motor soft starter. The energy-saving hydraulic system and the automatic control system of the energy-saving hydraulic system have the advantages that the efficiency is high and energy is saved; the energy-saving hydraulic system can have access to the internet to form a production line; remote control can be conducted through the internet; the working pressure, the working speed and the working displacement can be controlled accurately; the touch screen can display and control equipment states, and operation is convenient; operation is safe and stable, and the hydraulic system can be widely applied to the hydraulic machine industry and high-grade, precise and advanced equipment with hydraulic pressure serving as motive power such as large-size hydraulic equipment.

The invention relates to a motor soft starter, more particularly a full digital-control middle / high voltage solid motor soft starter. The motor soft starter mainly comprises a digital microcomputer controller, a control power supply transformer, a power supply isolating switch, a power supply fuse protector, a main vacuum controller, a thermal overload relay, a bypass vacuum contactor and a silicon controlled rectifier module. Compared with the prior art, the motor soft starter which is formed by the series / parallel connection of a plurality of silicon controlled rectifiers, can meet the requirements of different current and voltage grades, control the output voltage by regulating the trigger angle of each silicon controlled rectifier; reduce the electrical and mechanical shocks on the power network, the motor and the linked equipment during the start-up process of the motor; and monitor the motor and provide the fault protection function after the motor start-up is completed.

The invention provides an iron core structure with permanent magnet materials for auxiliary excitation. The iron core structure is formed by a single square iron core or splicing of a plurality of square iron cores and adopts the structure form of AC / DC winding loose coupling. The iron core structure is characterized in that permanent magnet material bodies are installed outside or inside the iron core; the directions of the magnetic fields generated by the permanent magnet material bodies are identical to the directions of the magnetic fields generated by DC excitation; the permanent magnet material bodies can be wholly or partially embedded into one or a plurality of sections of the iron core; or a group of strip-type, plate-type or barrel-type permanent magnet material bodies are assembled outside or inside the iron core along axial directions of iron core columns; and the permanent magnet material bodies can be installed on the iron core column at the AC side, on a yoke outside the iron core or at the corners of the iron core. The iron core structure adopts the permanent magnet materials to provide constant bias, is suitable for the electrical equipment with iron cores needingto work under the condition of saturated bias, such as saturated iron core reactors, saturated iron core superconducting current limiters, motor soft starters and the like, and can effectively reducethe volume and weight of the equipment and lower the manufacturing cost.

The invention relates to a digital control system of an asynchronous motor soft starter. The digital control system comprises a synchronous signal detection circuit, a thyristor control module, a contactor, an electromotor signal detection module, a complex programmable logic device (CPLD) trigger pulse generation circuit and a digital signal processor (DSP) master control circuit, wherein the synchronous signal detection circuit is arranged on a three-phase power supply; the thyristor control module is connected with the three-phase power supply and an electromotor respectively; the contactor is connected with the three-phase power supply and the electromotor respectively; the electromotor signal detection module is connected with the electromotor; the CPLD trigger pulse generation circuit is connected with the synchronous signal detection circuit and the thyristor control module respectively; and the DSP master control circuit is connected with the CPLD trigger pulse generation circuit, the contactor and the electromotor signal detection module respectively. Compared with the prior art, the digital control system has the advantages that a DSP and a CPLD is combined, the running efficiency and the control accuracy of the system are improved, the stability, the interference resistance and the security of the system are enhanced, and the digital control system has high universality and maneuverability.

The invention discloses an asynchronous motor soft starter and a predictive feedback control method based on the same, which belong to the technical field of automatic detection and control. The asynchronous motor soft starter comprises a three-phase power interface, a control power loop, a thyristor conduction angle detection loop, a synchronization signal acquisition module, a central auxiliaryprocessor, a serial port simulation debugging module, a thyristor driving and phase controlled voltage regulation circuit, a voltage and current detection loop, a digital-to-analog A / D conversion loop, a central main processor, a bypass control module, a man-machine interaction display module and an asynchronous motor interface. The technical problems of disturbance, oscillation and secondary impact during the soft starting of an asynchronous motor are solved.

The invention relates to the manufacturing technical field of a motor soft starter, and particularly to a soft starter thyristor intelligent module. The soft starter thyristor intelligent module comprises two thyristors and two radiators, wherein the two thyristors are connected in an anti-parallel manner and are crimped between the two radiators; a temperature sensor is arranged between the two radiators; the temperature sensor is used for sending a collected temperature signal to an intelligent temperature control protection circuit; the intelligent temperature control protection circuit is used for collecting the temperature signal information and controlling the operation of the thyristors; the radiators can satisfy the radiating requirements of the operation; meanwhile, the thyristors and the thyristors are packaged in one insulating shell; the radiators are directly and externally connected with a power terminal and a control terminal; the two radiators are connected with electromagnetically-controlled mechanical contacts; and the intelligent temperature control protection circuit controls the actions of the electromagnetically-controlled mechanical contacts through electromagnetic coils on the electromagnetically-controlled mechanical contacts. By adoption of the soft starter thyristor intelligent module, the thermal resistance of the thyristors is reduced, the reliability of the product is improved, and the cost of the product is lowered.

The invention relates to the technical field of motor soft starter manufacturing, and especially relates to a dedicated thyristor module for soft starters. The thyristor module comprises two thyristors and two radiators, and the two thyristors are reversely connected in parallel and clamped between the two radiators. The weight, size and cost of the radiators are reduced. The radiators achieve three functions, namely, a heat conduction function, a radiating function, and a function of sealing the thyristors and isolating the thyristors from air to prevent oxidation and function failure caused thereby. The radiators are directly and externally connected with a power terminal and a control terminal. The thermal resistance of the thyristors is reduced, the reliability of products is improved, the size of soft starters is reduced, and the cost of products is lowered.

The invention relates to a conventional motor soft starter, more particularly a full digital-control soft starter. The indicative signal of a signal relay of the soft starter comprises a fault signal, an overload signal, an operation signal and a start-up boost finish signal. The soft starter serves the excellent control function and multiple protective functions. Compared with the prior art, the soft starter utilizes a 16-bit single chip microcomputer to realize the full-digital date processing and to control the voltage ramp during the processes of the start-up and the stop; serves the functions of pulse bound, high-current shut-off, pump stop, built-in electronic overpower protection, phase-failure protection, over-current protection, over-temperature protection, self-diagnosis and energy conservation; can eliminate the current impact during the processes of the start-up and the stop of the motor; can reduce the capacity of the power network; and can protect the motor and the load against the mechanical shock during the processes of the start-up of the motor.

The invention relates to a motor soft start circuit for a switching transformer, which belongs to the field of electrical technology, and is characterized in that two output terminal lines are drawn out from the high-voltage power supply bus bar, which are respectively connected with the bypass circuit breaker KA and the start circuit breaker KB, and the start circuit breaker KB The output terminal line is connected to the primary side of the switching transformer and one end of the current transformer in turn, the other end of the current transformer is connected to the motor, the primary side of the switching transformer and the current transformer are connected to the output terminal of the bypass circuit breaker KA, and the switching transformer An excitation power supply is connected in series on the secondary side of the excitation power supply, and the output end of the excitation power supply is connected with one end of the PLC controller. The soft start circuit designed by the invention can solve the technical problems of the existing soft start circuit technology such as large impact by the power grid, low precision and short service life.

The invention provides an intelligent Chinese character display solid-state soft starter, and belongs to the technical field of the motor soft starter. The invention solves the problems that a motor generates secondary pulse with heavy current by adopting a Y-Delta starter or a self-coupling voltage-reduced starter, so that the price of a variable frequency starter is high; and the prior analog type and digital intelligent liquid crystal Chinese character display soft starter is less in functions and inconvenient in operation. The soft starter is characterized in that a signal collected from the motor is transmitted to an MCU through a signal processing circuit and processed by the MCU; on the one hand, the processed signal is transmitted to a liquid crystal display for display, on the other hand, the processed signal is transmitted to a thyristor to trigger the processing of a control circuit, so as to form a triggering control signal to control a thyristor module contactor and the voltage in a main circuit; clock data read by the MCU from a clock circuit is stored in an E<2>PROM storage unit; and the software composition process is solidified in the MCU. The invention adopts the processing of a high-speed singlechip, an RTX-51 real-time operating system is internally embedded, a secondary menu of the graphic liquid crystal display is operated, and the functions of the measurement, the control, the protection and the failure record are integrated, so that the operation is direct-viewing and simple, and the performance is reliable.

The invention provides a motor soft starter, and relates to the technical field of starting equipment. The motor soft starter comprises a main casing, an upper cover cap, a driving circuit board, a thyristor heat radiator assembly and a mutual inductor, wherein the thyristor heat radiator assembly is arranged in the main casing, the driving circuit board is arranged above the thyristor heat radiator assembly, the mutual inductor is connected with one end of the thyristor heat radiator assembly, the upper cover cap is fixed on the main casing, and a display screen and a keyboard are arranged on the upper cover cap and are connected with the driving circuit board. The motor soft starter is characterized in that: a wire inlet end board and a wire outlet end board are respectively clamped at both ends of the main casing, two rows of fixed rods are also arranged on the bottom surface inside the main casing, the thyristor heat radiator assembly is arranged in an insulation groove, both ends of the insulation groove are fixed on the fixed rods through an insulation sleeve rod, and a wiring terminal protection cover is also arranged at one side of the upper cover cap. The motor soft starter has the beneficial effects that the structure is simple and reasonable, the assembly is convenient, the operation is safe and stable, and the electromagnetic interference resistance capability is strong.

The anti-misoperation isolating switch relates to an isolating switch, in particular to an isolating switch suitable for a motor soft starter cabinet. The invention prevents the handle from being locked when the handle is in the on position, so as to prevent the large motor from running and stopping in time when an accident is about to be caused or has already been caused. The invention has a cabinet door anti-misoperation operating system with the function of locking the cabinet door of the motor soft starter cabinet. During the operation of the large motor, the cabinet door is locked by it and cannot be opened to prevent high voltage from passing through the motor soft starter cabinet. When the power is on, the equipment will be damaged or electric shock will be caused. The present invention reasonably restricts the starting of large motors and the opening of cabinet doors through the above-mentioned two easy-to-operate error-proof operating systems, thereby ensuring the safety of staff and equipment.

The invention discloses a buffer starter comprising a starter body. Pusher dogs are arranged on two sides of the starter body and are fixedly connected with the starter body through a sealing pad, pressing pieces are arranged in the pusher dogs and made of elastic materials, the insides and two ends of the pressing pieces form hollow cavity structures, buffer springs which are spiral springs are arranged in hollow cavities, the height of the buffer springs is smaller than the length of the pressing pieces, two ends of the buffer springs can extend out of the pressing pieces when in elastic pressing, and the pusher dogs are respectively connected with a pusher dog shaft and a crankshaft. The buffer starter effectively solves the problem that existing starters are low in rotation speed, high in operation load and a stay cord is tight to add difficulty in starting during starting, various parts are not collided and worn, and effective buffer and energy storage are realized under the action of the buffer springs, therefore, recoil force of the air cylinder of a gasoline engine is effectively buffered, vibration is reduced to the great extent and starting is more labor saving.

The invention discloses a parameter setting device for a motor soft starter. The parameter setting device mainly comprises an infrared transmitting and receiving module, a microcontroller module, a storage module and a display circuit, wherein an input end of the microcontroller module is electrically connected with an output end of the infrared receiving module; the microcontroller module is interacted with the display circuit and the storage device; when a control key on an infrared remote controller is pressed down, the infrared transmitting and receiving module communicates and stores the data into the storage module through the microcontroller module, the control key on the infrared remote controller is adjusted by observing data on a liquid crystal display, the data of the storage module is further changed, and finally, start-up parameters of a soft starter of a three-phase alternating current asynchronous motor needed to be set in the starting process are set. Therefore, the defects that the parameter setting circuit board is extremely large, the wiring is complicated and excessive input / output (I / O) ports are occupied in the traditional soft starter can be overcome, and the parameter setting device is convenient to use.