279 results about "Motor protection" patented technology

The utility model discloses an anti-immersion American transformer station comprising a box station, the two ends of the front side of the box station are rotatably connected with station doors, the outer side of the box station is fixedly provided with a waterproof plate, the upper part of one side of the box station is fixedly provided with a motor protection cover, the front side of the box station is fixedly provided with a rubber frame, and the surface of the rubber frame is provided with a clamping groove. Magnet pieces are evenly arranged on the surface of a clamping groove in the surface of the rubber frame in an adhesive mode, a rubber clamping ring is fixed to the surface of the station door, and a metal piece is arranged in the rubber clamping ring. According to the anti-immersion American transformer substation, the anti-seepage effect of the American transformer substation can be improved through clamping and sealing of the L-shaped waterproof plates at the heat dissipation holes in the surface of the box station, the rubber frame in the box station and the rubber clamping ring on the surface of the station door.

The invention relates to the technical field of education and practical training, in particular to a low-voltage electrician special operation practical training examination system. A power supply module; the operation module is used for allowing examinees to complete various practical operation items; the data acquisition module is used for acquiring sequence, position and correctness data of wiring of examinees and analyzing motor steering, phase sequence and open-phase and short-circuit fault states; the motor protection module is connected with the main control module, and is used for monitoring the running state of the motor, performing overload, short circuit, undervoltage, overvoltage and open-phase protection, and executing a protection action of cutting off a power supply when an abnormality is monitored; an automatic scoring module; a remote communication module; an identity recognition module; and the evaluation system module is used for verifying the identity recognition information of the examinees and automatically extracting and displaying examination questions after the identity verification is completed. According to the application, full-process module collaboration is realized, and the effects of automatic management, data acquisition and analysis of motor practical operation evaluation are realized.

The invention relates to the technical field of motor protection, and discloses a high-efficiency motor operation safety control method, which comprises the following steps: S1, based on an embedded sensor, adopting a multi-source data fusion algorithm, and through Kalman filtering and normalization processing, collecting and preprocessing operation data of a motor in real time, generating preprocessed multi-dimensional sensor data, and sending the preprocessed multi-dimensional sensor data to a server; and S2, on the basis of the preprocessed multi-dimensional sensor data, a physical model driving method is adopted, and a digital twin model of a motor is updated through a real-time simulation engine, so that a current motor state is mapped, and high-fidelity digital twin state mapping is generated. By collecting multi-source sensor data in real time and applying Kalman filtering and normalization processing, the data quality and consistency are remarkably improved, and a reliable foundation is laid for subsequent analysis; high-fidelity digital twinning state mapping is constructed based on physical model driving and a real-time simulation engine, dynamic and accurate representation of multiple physical field states in the motor is realized, and the state sensing depth is enhanced.

The utility model discloses a blending device for preparing a precise electronic component cleaning agent. The blending device comprises a stable base, a cleaning agent preparation bin, a transmission motor protection shell and a pressure adjusting pump, a controller and a cleaning agent preparation bin are fixedly installed at the top of the stable base, a transmission motor is fixedly installed at the top of the other side of the cleaning agent preparation bin through a transmission motor protection shell, the output end of the transmission motor is rotationally connected with a shaft linkage rod, and a pressure adjusting pump is fixedly installed at the bottom of the cleaning agent preparation bin. And an electromagnetic valve is fixedly mounted on one side of the pressure adjusting pump. According to the cleaning agent conveying device, an operator can know the conveying condition of a cleaning agent in real time so as to adjust and control the cleaning agent, so that accurate conveying and using of the cleaning agent are ensured, and the production efficiency and quality are improved.

The invention relates to a new energy automobile motor protection device, and belongs to the technical field of motor protection. Comprising a shell, a motor body is installed in the shell, end covers are installed on the two sides of the motor body, a sealing protection assembly is arranged at the shaft end of the motor body, an arc-shaped supporting table is installed at the bottom of the motor, supporting rods are fixedly connected to the bottom of the arc-shaped supporting table, and a crumple anti-collision assembly is arranged between every two adjacent supporting rods. An air bag is installed at the bottom of the arc-shaped supporting table, a triggering assembly is arranged in the crumple anti-collision assembly, and a pressure maintaining assembly is arranged above the crumple anti-collision assembly. The sealing protection assembly is arranged between the end cover and the driving shaft, and the sealing protection assembly is used for realizing self-adaptive fitting depending on the pressure change of gas in the motor body. The problems that motor protection sealing reliability on an existing new energy electric vehicle is insufficient, the anti-collision capacity is limited, and protection continuity is poor can be effectively solved.

The utility model discloses an outdoor heat dissipation breathable rainproof device, relates to the field of outdoor motor protection equipment, and can solve the problems that an existing motor heat dissipation waterproof device is poor in heat circulation, not ideal in heat dissipation effect, poor in waterproof performance and prone to being invaded by rainwater. The drainage groove and the multiple splash-proof structures are arranged in the splash-proof groove of the protection component, and meanwhile the first heat dissipation holes are formed in the splash-proof structures, so that air circulation is effectively enhanced. The design of the drainage groove ensures that water flow can be drained in time, the influence of accumulated water on heat dissipation is avoided, and therefore the heat dissipation performance is improved, the protective cover body adopts the structural design that an inclined frame body and a rectangular frame body are combined, an air circulation channel is further optimized, the heat dissipation efficiency is improved, the flood prevention inner weir is 1 mm higher than second heat dissipation holes, and the heat dissipation efficiency is improved. And the waterproofness is further enhanced. The design of the inner weir effectively prevents rainwater from entering the heat dissipation holes, and ensures that the equipment is not influenced by the rainwater.

The invention discloses a motor drive control system and method for automation equipment, and relates to the technical field of motors. The system comprises a data acquisition module, a diagnosis analysis module and a protection module, and the data acquisition module is convenient for real-time acquisition of data parameters of rotation speed, current, voltage, temperature, vibration amplitude and noise sound waves in the operation process of the motor, so that multi-dimensional monitoring of the motor is realized; the diagnosis and analysis module is convenient to diagnose and analyze the collected data, the purpose of comprehensively analyzing and diagnosing the running state of the motor is achieved, the control precision of the motor is improved, and the purposes of protecting the motor in real time and early warning the fault are achieved by combining the protection module to carry out coping treatment and early warning on the fault after diagnosis and analysis.

This invention provides a mobile inspection platform and its mobility method for non-coal mines, relating to the field of safety inspection technology in non-coal mines. The platform incorporates image recognition and gas concentration analysis algorithms, automatically identifying equipment status, personnel activity, and gas anomalies, and predicting risks, significantly improving safety and efficiency. It adopts a top-mounted, side-mounted rail installation method, saving ground space, avoiding collisions with personnel and equipment, and adapting to narrow tunnels; the rail uses high-strength, lightweight materials, ensuring high stability. The platform supports real-time monitoring of multiple parameters, can be expanded with various sensors, and combines remote control and timed tasks to achieve unattended, efficient inspections. The modular design facilitates maintenance and is equipped with PID control, collision sensing, automatic return, and multiple motor protections to ensure stable and safe operation. Encrypted data transmission, local storage, and remote upload are combined to automatically generate multi-format inspection reports, assisting in intelligent mine decision-making.

This application discloses a marine generator winding protection device, belonging to the technical field of generator protection devices. The protection device includes a base and a generator installed on the base. A fixing frame is provided at the lower end of the base, a lower housing is provided at the upper end of the fixing frame, and an upper housing is provided at the upper end of the lower housing. A moisture-proof mechanism is provided inside the upper housing, and a partition frame is installed inside the upper housing. Several condensation plates are evenly distributed at the upper end of the partition frame. The condensation plates are fixed to the partition frame by a support base. A guide duct runs through the partition frame. External air enters from the air inlet pipe. When it flows through the guide duct, the humid air comes into contact with the condensation plates and condenses. The water vapor is discharged along the guide groove. Dry air circulates through the exhaust pipe. The condensation plates condense water vapor through refrigeration or temperature difference effect. The guide groove drains water quickly, and the desiccant in the storage tank adsorbs residual water vapor, forming a triple protection of condensation-drainage-drying, which effectively reduces the humidity in the generator room.

The invention relates to an off-road vehicle chassis structure and an off-road vehicle, and belongs to the technical field of automobile chassis structures. The bottom protection plate assembly comprises a cabin protection plate, a battery pack protection plate, an oil tank protection plate and a motor protection plate which are detachably arranged on the chassis assembly, are sequentially distributed in the length direction of the chassis assembly and are not overlapped with one another; the engine room protection plate, the battery pack protection plate, the oil tank protection plate and the motor protection plate are each provided with a longitudinal groove penetrating in the length direction of the chassis, and the engine room protection plate is provided with an oblique groove which is communicated with the longitudinal groove in the engine room protection plate and obliquely extends backwards to the outer side. The cabin protection plate, the battery pack protection plate, the oil tank protection plate and the motor protection plate are sequentially distributed in the length direction of the chassis assembly and installed on the chassis assembly in a non-overlapping mode, and the protection plates can be independently disassembled, assembled and replaced and do not affect one another; a user can flexibly select the protection plates with different thicknesses or protection levels for assembly or replacement according to actual protection requirements, and efficient customized configuration is achieved.

The utility model relates to the technical field of gear motors, and discloses a gear motor protection device which comprises a gear motor body, a connecting shaft is installed at the front end of the gear motor body, a sliding groove is formed in the surface of the connecting shaft, and a fixing plate is fixedly connected into the sliding groove. One end of the fixing plate is fixedly connected with a limiting rod, the tail end of the limiting rod is fixedly connected with the interior of the sliding groove, the surface of the limiting rod is slidably connected with a sliding block, the interior of the sliding groove is rotatably connected with an arc-shaped plate, and the top end of the sliding block is rotatably connected with a connecting plate. According to the gear motor protection device, automatic heat dissipation can be carried out when the gear motor main body runs, so that the gear motor main body can be kept at a moderate temperature when running, the aging of an insulating material, the copper loss of a winding and the damage of parts such as a bearing are reduced, and the effective protection of the gear motor main body is realized.

The utility model discloses a new energy automobile split type motor cover plate which comprises a cover type split cover plate and cover plate fixing battens arranged at the left end and the right end of the bottom of the cover type split cover plate, the cover plate fixing battens are fixedly connected with the cover type split cover plate through welding, a plurality of fixing holes are formed in the cover plate fixing battens, and the cover plate fixing battens are fixedly connected with the cover type split cover plate through welding. The cover plate fixing battens are arranged on the outer wall of the top end of the cover plate, the cover plate fixing battens are arranged on the outer wall of the cover plate fixing battens, sealing gaskets are connected to the bottoms of the cover type split cover plate and the two cover plate fixing battens and used for sealing the fixing positions, and an airflow type heat dissipation device is arranged at the top end of the cover type split cover plate. After the split type motor cover plate of the new energy automobile is installed, the motor can be protected in the split type motor cover plate, and the airflow type heat dissipation device can quickly guide and dissipate heat generated when the motor works, so that the situation that the heat is difficult to dissipate due to the fact that the motor continuously generates high temperature when the new energy automobile runs for a long time is avoided.

The invention relates to a servo motor overheating protection structure of a numerical control machine tool, which belongs to the technical field of servo motor protection of the numerical control machine tool and comprises a numerical control machine tool main body, a fixed frame arranged outside the numerical control machine tool main body and a servo motor component arranged outside the fixed frame, a heat dissipation mechanism used for heat dissipation is arranged outside the servo motor component, and a liquid conveying structure matched with the heat dissipation mechanism and used for cooling and lubricating is arranged outside the fixing frame. The servo motor component comprises a motor connecting base fixedly communicating with the top of the fixing frame, and the top of the motor connecting base is fixedly connected with a mounting frame. The servo motor overheating protection structure of the numerical control machine tool has the advantages of cooperation of heat dissipation and cooling lubrication, guarantee of output precision, reliable operation and the like, heat dissipation lubrication protection is achieved, additive precipitation is avoided, the servo motor overheating protection structure can flexibly adapt to different working conditions, stable operation of the servo motor is guaranteed, the service life is prolonged, the machining precision is guaranteed, and the maintenance cost is reduced.

The utility model relates to motor protection technical field especially relates to a kind of prevent motor condensation structure, comprising: motor cavity, junction box cavity, stator phase outgoing line, junction box cavity is connected with motor cavity;Stator phase outgoing line one side is located in motor cavity, other side is located in junction box cavity inside.The utility model is used by upper rubber sleeve, lower rubber sleeve and sub-cavity rib plate cooperation, the upper and lower sealing isolation of stator phase outgoing line is completed, so that motor cavity and junction box cavity form two different cavities, form physical isolation, which in motor working process, air in motor cavity is blocked by isolation component and isolated, so that hot air cannot reach junction box cavity, complete heat convection inhibition, so that junction box cavity and motor outside temperature difference reduces, inside and outside temperature reaches relative balance, cannot reach the environmental conditions of generating condensate, prevent the appearance of condensation phenomenon, and then effectively avoid the insulation problem of poor in the high-voltage outgoing line, high-voltage terminal and other positions of motor.

The utility model discloses a protection device for avoiding motor damage caused by locked rotor, which comprises a proximity sensor, a detection control unit and a motor start-stop unit, the proximity sensor is arranged on the outer side of a motor and picks up sensing signals of the end portion of a rod body when the rod body rotates, and the rod body is sleeved on the end portion of a motor rotating shaft through a center hole of the rod body. The detection control unit receives sensing signals of the proximity sensor, obtains the number of times that the end of the rod body passes in unit time, accordingly obtains the rotating speed of the motor, judges whether the motor is locked or not according to the rotating speed, and accordingly sends out control signals to control the motor to operate or stop. The protection device for preventing the motor from being damaged due to locked-rotor effectively solves the problem that the response sensitivity of the locked-rotor protection of the motor is slow in the prior art, improves the reliability of the motor protection, guarantees the safety production, improves the production benefit, and reduces the production cost.

The invention relates to the technical field of relay protection of a power system, and provides a pumped storage generator motor protection commutation method and system with an anti-error function. According to the numbers, sampling channels are distributed to a machine end voltage three-phase channel, a machine end current three-phase channel and a neutral point current three-phase channel of the pumped storage generator motor; acquiring a phase-change switch power generation position, an electric position and an opening position contact of the pumped storage power generation motor, and performing phase sequence conversion on three-phase channels of machine end voltage, machine end current and neutral point current below a phase-change switch according to the electric position of the phase-change switch; and when the abnormal displacement of the phase-change switch is judged, the protection device instantaneously adopts a memory value for the position of the phase-change switch participating in logic calculation, and sends out an abnormal displacement alarm of the phase-change switch after delaying for a preset time length. The alternating current sampling phase sequence of the protection device is consistent with the power generation or electric operation condition of the generator motor, and the reliability is improved.

The embodiment of the application discloses a kind of motor protection method, device and active short-circuit protection circuit, method includes: obtaining the working state of motor to be controlled, judge whether to need to carry out active short-circuit protection;If yes, then judge whether the active short-circuit protection circuit of motor to be controlled exists fault;If the result of judgment is that there is a fault, then control protection switch unit in active short-circuit protection circuit conduction.This application increases protection switch unit in active short-circuit protection circuit, and controls protection switch unit intervention when judging that active short-circuit protection circuit appears fault, solves the technical problem that once active short-circuit protection circuit appears fault in prior art, and cannot provide active short-circuit protection for motor, realizes the technical effect that provides multiple possibilities for active short-circuit protection, makes it more safe and reliable.

The utility model discloses a special yaw motor, and belongs to the technical field of yaw motor protection, the special yaw motor comprises a fixed seat and a yaw motor mounted on the fixed seat, and a cold-proof mechanism is arranged outside the yaw motor. The cold-proof mechanism comprises movable rail frames symmetrically installed on the fixing base and a cold-resisting cover shell arranged on the fixing base, a temperature sensor is installed on the cold-resisting cover shell, and an installation groove is formed in the upper end of the cold-resisting cover shell. The yaw motor is preheated through the cold resisting cover shell, so that the yaw motor can operate more stably, the heat preservation cotton in the cold resisting cover shell can effectively store generated heat energy and effectively isolate external low temperature, the yaw motor operates in a more suitable temperature environment, the service life is prolonged, the reliability is improved, and meanwhile the yaw motor can operate more stably. And by utilizing the protection of the shade of the cold resisting housing, the yaw motor can be effectively protected in severe weather, and the service life of the yaw motor is prolonged.

The invention provides a large copper ring casting centrifugal machine which comprises a tray used for bearing a copper ring casting. The transmission shaft is fixedly connected to the bottom of the tray, the transmission shaft is arranged in the supporting frame, a bearing ring corresponding to the transmission shaft is arranged in the supporting frame, and the transmission shaft is inserted into the bearing ring and rotationally connected with the supporting frame; and the power output end of the driving assembly is connected with the transmission shaft. The invention has the beneficial effects of simple maintenance, motor protection during overload, stable operation, buffering and vibration absorption, integral hoisting of the transmission shaft during disassembly and assembly, and no need of disassembly of the shaft system, thereby facilitating reduction of the production cost, improvement of the safety and stability of equipment and improvement of the production efficiency.

The utility model discloses a high-power three-phase toroidal transformer capable of cooling and dissipating heat by means of a motor water jacket, and relates to the technical field of three-phase toroidal transformers. A motor rotating shaft is arranged in the middle of the motor protection shell, and a cooling water channel is formed in the inner side of the edge of the motor protection shell; a transformer shell is arranged on the inner side of the right end of the motor protection shell, an inner ring is arranged on the inner side of the transformer shell, a dovetail groove is formed in the inner side of the outer end of the inner ring, a winding yoke is arranged on the inner side of the dovetail groove, a main coil is arranged on the outer side of the winding yoke, and a secondary coil is arranged on the outer side of the main coil. The technical problems that a single transformer is large in size, no independent transformer placing position exists in an application site, after the transformer is integrated with a motor and a frequency converter system, the system is large in size, most systems do not have installation space for transformation, and meanwhile a conventional transformer is poor in heat dissipation condition and does not have sufficient heat exchange conditions are solved.

The invention belongs to the technical field of automobile electronics, and discloses an automobile window relay adhesion fault detection and motor protection method, which comprises the following steps: S1, calibrating a current value when voltages at two ends of a bidirectional direct current motor are zero, namely a shutdown calibration value; s2, when the vehicle window normally stops driving, the current of the bidirectional direct current motor is detected; s3, protecting the bidirectional direct current motor; when the relay has an adhesion fault, setting a fault mark, and regulating relay contacts at two ends of the bidirectional direct current motor to be high level through the MCU, so that the bidirectional direct current motor stops at the high level; and S4, in the adhesion protection period, whether the adhesion fault is recovered or not is judged by periodically clearing the adhesion fault mark, and if the fault is not recovered, the fault mark is reset. According to the method, the accuracy of relay adhesion fault detection is improved, and meanwhile, the motor can be protected without installing other monitoring and regulating equipment.

The utility model discloses a jaw crusher for quartz melting, which relates to the field of jaw crushers, and comprises a crusher main body, a motor protection box is arranged on one side of the crusher main body, a conveyor belt is arranged on one side of the crusher main body, and a driving motor is arranged in the motor protection box. Crushing operation is conducted through the crusher body, a user can place the supporting bottom plate on the top of the crusher body through hoisting equipment and fix the supporting bottom plate by rotating the fixing bolts, the user places raw materials on the conveying belt, then wires are connected through the wire holder, the driving motor is started, and the raw materials are conveyed to the crusher body. When the driving motor is started, the driving shaft drives the driving shaft to rotate, the conveying belt is driven to move to carry out material conveying operation, raw materials fall onto the rolling shaft after being conveyed to the top of the conveying belt and fall into the crusher body through the feeding groove, and therefore the automatic material conveying and crushing functions of the jaw crusher for quartz melting are achieved.

The application provides a kind of intelligent switch cabinet operation control system and method, including control unit, operating current acquisition module, soft start control unit, motor control unit, software anti-misoperation logic module, wherein, software anti-misoperation logic module is used to verify circuit breaker opening and closing state, electric chassis pose state, electric grounding knife opening and closing state and network cabinet door opening and closing state;Control unit is deployed in power monitoring system safety I area, and control unit is connected and interacted with remote host computer or sequential control host computer through communication interface, and communication interface supports the transmission of single task single command, combined task single command and combined task combined command, operating current acquisition module real-time acquisition motor operating current and wave recording, and wave recording data is uploaded to remote host computer or sequential control host computer for verification through communication interface.The application has low cost, with operating wave recording, soft start, multiple anti-misoperation and motor protection functions, to meet the requirements of "power monitoring system safety protection regulations" partition.

The utility model relates to the technical field of spraying, and discloses a granite surface scratch-resistant wear-resistant coating spraying device which comprises a coating barrel and a moving trolley, the right end of the inner wall of the coating barrel is fixedly connected with a fixing strip, the left side of the fixing strip is fixedly connected with a motor protection shell, and the top of the inner wall of the motor protection shell is fixedly connected with a servo motor. The output end of the servo motor is fixedly connected with a rotating shaft, the outer wall of the rotating shaft is fixedly connected with a plurality of stirring shafts, the middle of the outer wall of the rotating shaft is fixedly connected with two scraping plates, the middle of the inner wall of the coating barrel is fixedly connected with a liquid separation plate, and the right side of the top end of the liquid separation plate is fixedly connected with an electromagnetic valve. According to the utility model, the servo motor drives the rotating shaft, the stirring shaft and the scraper blade to stir the coating, the electromagnetic valve accurately controls the spraying component, the stirring and heating functions are realized through cooperation of a plurality of components, the coating is prevented from being solidified, the coating is saved, the efficiency of the device is improved, and the quality is ensured.

The utility model relates to a flue ash cleaning device. A motor is arranged in a motor protection cover; a rotating shaft of the motor is connected with a rotating rod capable of adjusting the length, and the fan is arranged at the bottom of the rotating rod; the brush is arranged on the periphery of the fan, a dust discharging bent pipe is arranged on the side wall of the dust box, and a dust collecting bag is arranged at the tail end of the dust discharging bent pipe. The rotating rod is driven by the motor to rotate, the brush and the fan are driven to rotate, the brush can loosen and scatter cigarette ash in a flue, deep cleaning of the flue is achieved, and it is guaranteed that the cigarette ash is thoroughly removed; the fan rotates to accelerate the flow rate of surrounding airflow, a pressure difference is generated inside and outside the device, loose soot in the flue is sucked into the soot box, the soot is prevented from escaping, and the harm to human bodies and the pollution to the environment after the soot enters the air are avoided; and the cleaned ash falls into the ash collecting bag through the ash bent pipe, so that efficient collection of the ash is realized.

This application relates to a motor protection structure, which includes a fixed protective component mounted on the motor housing and a movable protective component coaxially disposed on the motor shaft. A gap is left between the fixed protective component and the motor shaft. The fixed and movable protective components are coaxially disposed and interlocked, with a gap remaining between them. Through the cooperation between the fixed and movable protective components, the length of the path required for a foreign object to move towards the gap between the shaft and the housing is increased, making it less likely for foreign objects to enter the gap between the housing and the shaft. This improves the protection against foreign objects and minimizes the impact on the normal operation of the motor.

The utility model provides a motor protection structure and a vehicle, the motor protection structure is used for protecting a motor in an electric drive axle, the motor protection structure comprises a protection piece and a connecting piece, the protection piece is located below the motor and covers the motor in the vertical direction, and the protection piece comprises a first protection plate and a second protection plate which are arranged in a stacked mode; the connecting piece comprises at least two connecting parts connected to the edge of the protective piece, the connecting parts are bent towards the motor relative to the protective piece, and all the connecting parts are connected to the electric drive axle. According to the motor protection structure, the protection position is more accurate, and the area of the protection part is reduced, so that consumables are reduced, the weight is reduced, the cost is saved, the occupation of the vehicle bottom space is reduced, the space of the vehicle in the vertical direction is saved, and the trafficability of the vehicle is improved. The motor protection structure is simple, the motor is prevented from being damaged when the bottom of the vehicle is subjected to large impact, and therefore the reliability of the motor is improved.

The invention discloses a bimetallic strip supporting ring mounting device of an automatic assembling machine of a motor starting protector, and belongs to the technical field of automatic assembling facilities of motor protection parts of refrigeration compressors. Comprising a bimetallic strip supporting ring extracting and releasing mechanism, the double-metal-sheet supporting ring extracting and releasing mechanism comprises a double-metal-sheet supporting ring sucking and releasing driving motor, a double-metal-sheet supporting ring sucking and releasing driving motor fixing plate, a suction nozzle transverse displacement connecting plate, a suction nozzle vertical lifting driving rod, a suction nozzle transverse displacement guide rail, a double-metal-sheet supporting ring sucking, transferring and releasing device and a fixing rod connecting arm. The bimetallic strip supporting ring sucks and releases the driving motor fixing plate connecting column and the supporting ring transition platform. The method has the advantages that the action reliability requirement of a complete circulating chain is met; the whole structure is simple and convenient to manufacture, use and maintain; the coordination of automatic assembly is ensured; the extraction and release effects of the bimetallic strip supporting ring are guaranteed, and the influence on the automatic assembly rhythm of the automatic assembly machine of the motor starting protector is avoided.