Alternating current variable frequency motor and rotor punching sheet for three-way piling car

Abstract

The invention discloses an alternating current variable frequency motor and rotor punching sheet for a three-way piling car, which comprises a high-efficiency driving system, an intelligent control system, a special scene adaptive structure and an auxiliary guarantee assembly, and is characterized in that the high-efficiency driving system is connected with the intelligent control system and the auxiliary guarantee assembly; the intelligent control system is in signal interaction with the special scene adaptation structure, and the auxiliary guarantee assembly provides installation, fixation and protection support for all the systems; the high-efficiency driving system comprises an alternating-current variable-frequency motor body, a transmission and brake matching structure and a heat dissipation structure, and the alternating-current variable-frequency motor body achieves power output and brake control through the transmission and brake matching structure. The high-efficiency driving-intelligent control-special scene adaptation-auxiliary guarantee collaborative design is adopted, the systems form closed-loop control through signal interaction and rigid connection, compared with a traditional open-loop motor, the operation precision is improved by 40%, the comprehensive energy consumption is reduced by 25%, and the continuous operation duration exceeds 8 hours.

Description

Technical Field

[0001] This invention belongs to the field of AC variable frequency motor technology, and particularly relates to AC variable frequency motor and rotor laminations for three-way stacker trucks. Background Technology

[0002] With the rapid development of warehousing and logistics, cold chain transportation, chemical storage and other fields, electric three-way stacker trucks have become core equipment for improving space utilization because they can realize three-dimensional transportation of goods in narrow aisles. The performance of its core AC variable frequency motor directly determines the stacker truck's operating efficiency, scenario adaptability and safety.

[0003] However, the current traditional AC variable frequency motors for three-way stacker trucks have many technical shortcomings, making it difficult to meet diverse operational needs. On the one hand, they lack a multi-system collaborative architecture, resulting in low operational accuracy, high overall energy consumption, and a lack of adaptation designs for special scenarios such as refrigeration and chemical explosion protection, leading to poor versatility and difficulty in meeting efficient and diverse operational needs. On the other hand, the motor power is often insufficient, resulting in weak traction and climbing ability. The braking system is mostly a single mechanical structure with slow response, and heat dissipation relies on natural heat dissipation, making it prone to overheating and shutdown under high load conditions, resulting in low operational reliability. Summary of the Invention

[0004] To address the problems in the prior art, the present invention proposes the following technical solution: A three-way stacker truck AC variable frequency motor includes a high-efficiency drive system, an intelligent control system, a special scene adaptation structure, and auxiliary support components. The high-efficiency drive system is connected to the intelligent control system and the auxiliary support components respectively. The intelligent control system interacts with the special scene adaptation structure via signals. The auxiliary support components provide installation, fixing, and protection support for each system. The high-efficiency drive system includes an AC variable frequency motor body, a transmission and braking coordination structure, and a heat dissipation structure. The AC variable frequency motor body realizes power output and braking control through the transmission and braking coordination structure, and the heat dissipation structure is wrapped around the AC variable frequency motor body. The intelligent control system includes an encoder assembly, an electronic control unit, and a monitoring and correction module. The encoder assembly is electrically connected to the electronic control unit, and the signal output terminal of the monitoring and correction module is connected to the electronic control unit. The electronic control unit and the AC variable frequency motor body form a closed-loop control. The special scenario adaptation structure includes a refrigeration scenario adaptation component and a chemical explosion-proof scenario adaptation component, which are respectively embedded in the key parts of the AC variable frequency motor body; The auxiliary support component includes an electrical interface structure, a fixing component, and a protective component. The electrical interface structure is connected to the signal terminal of the intelligent control system, and the fixing component is rigidly connected to the AC variable frequency motor body and the transmission and braking cooperation structure.

[0005] As a preferred embodiment of the above technical solution, the AC variable frequency motor is configured with a power of 50kW and includes a winding stator core and a rotor. The rotor is circumferentially fixed to the shaft by an A-type flat key. The outer circle of the stator core is sprayed with silver paint, and the shaft extension and end cover stop are coated with anti-rust oil.

[0006] As a preferred embodiment of the above technical solution, the transmission and braking coordination structure includes a gearbox, an electromagnetic brake, and a mechanical brake. The electromagnetic brake has a rated voltage of 80Vdc, a rated torque of ≥80N.m, a pull-in voltage of ≤56V, a release voltage of >1.8V, and a holding voltage of 64Vdc±10%. The electromagnetic brake and the mechanical brake form a three-stage braking system and are linked with the hydraulic system to achieve lateral stability control.

[0007] As a preferred embodiment of the above technical solution, the encoder assembly includes a plug-in type dual-coil absolute encoder and an encoder gear ring. The encoder outputs 64 square wave pulse signals per revolution. The electronic control unit is equipped with a controller whose continuous current is 1.2 times the rated current of the motor and adopts a modular design.

[0008] As a preferred embodiment of the above technical solution, the monitoring and correction module includes an infrared scanning array and a temperature sensor. When the infrared scanning array detects that the tray is tilted by more than 5%, it triggers the self-correction program of the electronic control unit. The temperature sensor is fixed by balancing putty, and the temperature signal is transmitted to the electronic control unit via an electrical interface.

[0009] As a preferred embodiment of the above technical solution, the cold storage scene adaptation component includes low-temperature resistant and cold-proof materials and a low-temperature lubrication system, and the chemical explosion-proof scene adaptation component includes an explosion-proof circuit that conforms to AS / NZS2381 certification and a high-strength explosion-proof shell, and the impact resistance of the explosion-proof circuit is improved by 90%.

[0010] As a preferred embodiment of the above technical solution, the electrical interface structure includes a terminal block assembly and an AMP connector. The tightening torque of the nuts on the terminal block is 10-12 N·m. The motor lead wires are fitted with Ø10 silicone tubes and the phase sequence is distinguished by a marking tube.

[0011] As a preferred embodiment of the above technical solution, the fixing component includes a front cover, a rear cover plate, a shaft retaining ring, and a lifting ring, and the protective component includes a domestically produced high-temperature grease bearing and a wave spring.

[0012] The rotor lamination is used in the aforementioned three-way stacking vehicle AC variable frequency motor. The rotor lamination is a silicon steel sheet stamping structure. The outer diameter of the rotor lamination matches the inner diameter of the stator core. A shaft hole is opened in the center. The inner wall of the shaft hole is provided with a keyway adapted to a type A flat key. The rotor lamination has 24 guide bar grooves evenly distributed around its circumference. The guide bar grooves have an inclined groove structure with an angle of 3°. The depth of the guide bar grooves is 1 / 3 of the radius of the rotor lamination. The rotor lamination has 4 positioning holes on its edge. The spacing between adjacent positioning holes is equal and is used for positioning and fixing during stacking.

[0013] As a preferred embodiment of the above technical solution, the rotor lamination has a thickness of 0.35mm and is coated with a 0.02mm thick insulating coating. The guide bar groove has a trapezoidal cross-section with a groove opening width smaller than the groove bottom width and a rounded corner transition at the groove opening. The rotor lamination also has 6 heat dissipation through holes, which are located between the guide bar groove and the positioning hole, and are evenly distributed in a ring shape with a diameter of 3mm. The length of the rotor core formed by stacking the rotor laminations is compatible with L=225 in the rotor specification, and the stacking coefficient is ≥0.95.

[0014] The beneficial effects of this invention are as follows: 1. This invention adopts a collaborative design of "high-efficiency drive - intelligent control - special scenario adaptation - auxiliary protection". Each system forms a closed-loop control through signal interaction and rigid connection. The operation accuracy is improved by 40% compared with the traditional open-loop motor, the overall energy consumption is reduced by 25%, and the continuous operation time exceeds 8 hours. 2. The main body of the 50kW AC variable frequency motor of this invention is equipped with a stator core silver powder paint coating, which reduces power loss by 25%, reduces the probability of inter-turn short circuit by 40% within five years, increases traction by 67% compared to the 30kW motor, and increases the climbing ability on a 15° slope by 50%. The rotor and shaft are circumferentially fixed by an A-type flat key, with a transmission gap of ≤0.02mm and a power transmission efficiency of 98%. At the same time, the three-level braking system of "gearbox + electromagnetic brake + mechanical brake" is combined with hydraulic linkage, with a braking response of 0.3 seconds, lateral stability of 80% load displacement rate, and fork rotation sway of ≤5mm. Meanwhile, the enclosed heat dissipation increases the heat dissipation efficiency by 30%, solving the problem of overheating and shutdown under high load. 3. The present invention features a plug-in type dual-ring absolute encoder that works in conjunction with a 64-tooth gear ring, outputting 64 square wave pulse signals per revolution to achieve 0.01mm-level positioning, which is 80% more accurate than ordinary incremental encoders. When the infrared scanning array detects that the pallet is tilted by more than 5%, it triggers a self-correction program within 0.5 seconds, reducing the damage rate of goods by 90%. The temperature sensor (error ≤ ±2℃) provides real-time monitoring, reducing the overheating failure rate by 80%. The modular design of the controller allows for replacement in just 3 minutes, increasing maintenance efficiency by 70% compared to traditional integrated controllers and reducing downtime losses for stacker trucks. 4. This invention uses silicon steel sheets stamped (magnetic permeability ≥ 1.5T) with a 0.35mm thick and 0.02mm thick insulating coating, resulting in a 30% reduction in iron loss and a 40% reduction in eddy current loss. 24 3° inclined guide bar slots reduce harmonic loss by 25% and electromagnetic noise by 5dB. The trapezoidal guide bar slots and rounded corners reduce the failure rate of loose guide bars by 80%. Six 3mm annular heat dissipation holes increase the core heat dissipation area by 20% and reduce the temperature by 15°C. The stacking coefficient is ≥ 0.95 (density ≥ 7.6g / cm³). 3 With a deformation rate of ≤0.1% at 10,000 rpm, it provides core support for the efficient and stable operation of the motor. Attached Figure Description

[0015] Figure 1 The diagram shown is a structural schematic of the AC variable frequency motor used in the three-way stacker truck in the embodiment. Figure 2 The diagram shown is a schematic representation of the rotor lamination in the embodiment. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0017] Example like Figure 1 As shown, a three-way stacker truck AC variable frequency motor includes a high-efficiency drive system, an intelligent control system, a special scenario adaptation structure, and auxiliary support components. The high-efficiency drive system is connected to the intelligent control system and the auxiliary support components. The intelligent control system interacts with the special scenario adaptation structure via signals. The auxiliary support components provide installation, fixing, and protection support for each system. The high-efficiency drive system includes an AC variable frequency motor body, a transmission and braking coordination structure, and a heat dissipation structure. The AC variable frequency motor body achieves power output and braking control through the transmission and braking coordination structure, and the heat dissipation structure is wrapped around the AC variable frequency motor body. The intelligent control system... The system includes an encoder assembly, an electronic control unit, and a monitoring and correction module. The encoder assembly is electrically connected to the electronic control unit, and the signal output terminal of the monitoring and correction module is connected to the electronic control unit. The electronic control unit and the AC variable frequency motor body form a closed-loop control. The special scenario adaptation structure includes a cold storage scenario adaptation component and a chemical explosion-proof scenario adaptation component, which are respectively embedded in key parts of the AC variable frequency motor body. The auxiliary protection component includes an electrical interface structure, a fixing component, and a protective component. The electrical interface structure is connected to the signal terminal of the intelligent control system, and the fixing component is rigidly connected to the AC variable frequency motor body and the transmission and braking coordination structure.

[0018] It should be noted that through a multi-system collaborative architecture of "high-efficiency drive - intelligent control - special scenario adaptation - auxiliary support", the functions of each module are complementary and the performance is superimposed: The high-efficiency drive system provides core power for the stacker truck, the intelligent control system adjusts power output and fault correction in real time, the special scenario adaptation structure expands the application range of the motor, and the auxiliary support components ensure stable assembly and long-term operation of each system. The closed-loop control design enables the electronic control unit to dynamically adjust the operating parameters of the motor body based on the speed signal from the encoder assembly and the status signal from the monitoring and correction module. Compared with traditional open-loop control motors, the operating accuracy is improved by 40% and the overall energy consumption is reduced by 25%. The enclosed design of the heat dissipation structure improves the heat dissipation efficiency of the motor body by 30%, avoiding shutdown problems caused by overheating under high load conditions, and extending the continuous operation time to more than 8 hours.

[0019] like Figure 1 As shown, the AC variable frequency motor is configured with a power of 50kW and includes a winding stator core (model: 5XW.101.BYD522002.JQ090001, specification: JXQ-9-2C[L=225]) and a rotor (model: 5XW.200.BYD522002.JQ090001, specification: JXQ-9-2C[L=225]). The rotor is circumferentially fixed to the shaft by a type A flat key (specification: 8712, 8725). The outer circle of the stator core is sprayed with silver paint, and the shaft extension and end cover stop are coated with anti-rust oil.

[0020] Specifically, the 50kW high-power configuration meets the power requirements for the electric three-way stacker truck to operate smoothly in narrow aisles. Combined with the transmission, it can smoothly switch between a base speed of 2km / h and a micro-speed of 0.8km / h. Compared with the 30kW motor, the traction force is increased by 67%, and the climbing ability (15° slope) is increased by 50%. The silver powder coating on the outer circle of the stator core has excellent thermal conductivity and insulation properties, which can reduce the loss of electrical energy in the core, reduce the motor's electrical energy loss by 25%, and avoid the risk of inter-turn short circuits, reducing the probability of inter-turn short circuits by 40% within five years. The circumferential fixing design of the type A flat key (8712, 8725) ensures that the transmission clearance between the rotor and the shaft is ≤0.02mm, and the power transmission efficiency reaches over 98%, avoiding power waste caused by transmission slippage; the anti-rust oil coating on the shaft extension and end cover stop can effectively isolate moisture and dust, reducing the corrosion rate of components by 90% in humid storage environments and extending the service life of the motor to more than 5 years.

[0021] like Figure 1As shown, the transmission and braking coordination structure includes a gearbox, an electromagnetic brake (brake model: Z80V80C25L05), and a mechanical brake. The electromagnetic brake has a rated voltage of 80Vdc, a rated torque of ≥80N.m, a pull-in voltage of ≤56V, a release voltage of >1.8V, and a holding voltage of 64Vdc±10%. The electromagnetic brake and the mechanical brake form a three-stage braking system and are linked with the hydraulic system to achieve lateral stability control.

[0022] Specifically, the adaptive design of the transmission and the motor body can convert the high speed of the motor into the low speed and high torque required by the stacker truck, so that it can still maintain stable operation under a load of 300kg and avoid the problem of insufficient power under heavy load. The electromagnetic brake (Z80V80C25L05) has a high rated torque (≥80N.m) to ensure that the stacker truck has no risk of slipping when fully loaded and parked. The parameter design of the pull-in voltage (≤56V) and release voltage (>1.8V) reduces the braking response time to 0.3 seconds, improving braking safety by 60% compared to traditional mechanical brakes. The three-stage braking design of "electromagnetic brake + mechanical brake" combined with the balanced support of the hydraulic system can control the lateral stability of the stacker truck within 80% of the load displacement rate. When the forks are rotated 170° to adjust the angle, the body sway is ≤5mm, preventing the goods from tilting and falling. The wide-range design of maintaining voltage (64Vdc±10%) enables the brakes to operate stably in voltage fluctuation scenarios and adapt to voltage changes (±15%) in warehouse power grids.

[0023] like Figure 1 As shown, the encoder assembly includes a plug-in type dual-coil absolute encoder (model: L=35MM1+2B3A4, wire length 470-530mm) and an encoder gear ring (model: 8XW.802.HL210145.JQ080001, specification: JXQ132-8 (1023012.564 teeth)). The encoder outputs 64 square wave pulse signals per revolution. The electronic control unit is equipped with a controller whose continuous current is 1.2 times the rated current of the motor and adopts a modular design.

[0024] It should be noted that the combination of the plug-in type dual-coil absolute encoder (L=35MM) and the 64-tooth encoder gear ring enables the motor to output 64 precise square wave pulse signals per revolution. The electronic control unit can achieve position positioning at the 0.01mm level through pulse counting. Compared with ordinary incremental encoders, the positioning accuracy is improved by 80%, which meets the requirements of precise docking of forks with pallets. The 470-530mm cable length design is suitable for the installation space of stacker trucks, avoiding signal interruption caused by cable pulling; The configuration of the controller's continuous current (1.2 times the motor's rated current) can avoid power mismatch issues. For example, when a 1500W motor is paired with a controller of ≥30A, the load difference is reduced by 200kg, ensuring that the motor has no risk of overload damage under high load conditions. The modular controller design reduces replacement time to 3 minutes, improves maintenance efficiency by 70% compared to traditional integrated controllers, and reduces stacker truck downtime.

[0025] like Figure 1 As shown, the monitoring and correction module includes an infrared scanning array and a temperature sensor (model: KTY84-150, cable length 330-400mm). When the infrared scanning array detects that the tray is tilted by more than 5%, it triggers the self-correction program of the electronic control unit. The temperature sensor is fixed by balancing putty, and the temperature signal is transmitted to the electronic control unit through an electrical interface.

[0026] Specifically, the real-time monitoring function of the infrared scanning array can quickly identify the tilt status of the pallet. When a tilt of more than 5% is detected, a self-correction program can be triggered within 0.5 seconds. The electronic control unit adjusts the fork angle and motor speed to correct the pallet tilt to within 1%, reducing the damage rate of goods by 90%. The temperature sensor (KTY84-150) features a 330-400mm cable length design to fit the internal wiring of the motor. The balanced adhesive fixing method ensures a good fit between the sensor and the motor body. Temperature detection error is ≤±2℃. It can monitor the motor winding temperature in real time. When the temperature exceeds 120℃, the electronic control unit automatically reduces the motor power to prevent winding burnout, reducing the motor overheating failure rate by 80%. The temperature signal is transmitted in real time via the electrical interface, enabling operators to remotely monitor the motor status, achieve preventative maintenance, and reduce unexpected failures.

[0027] like Figure 1 As shown, the cold storage scene adaptation component includes low-temperature resistant and cold-proof materials and a low-temperature lubrication system, and the chemical explosion-proof scene adaptation component includes an explosion-proof circuit that complies with AS / NZS2381 certification and a high-strength explosion-proof shell. The impact resistance of the explosion-proof circuit is improved by 90%.

[0028] Specifically, the low-temperature resistant and cold-proof materials (resistant to -40℃) of the components adapted for cold storage scenarios can prevent motor parts from becoming brittle at low temperatures. The low-temperature lubrication system uses low-temperature resistant grease (freezing point -50℃) to ensure that the motor can still operate smoothly in a -40℃ cold storage environment. Compared with ordinary motors, the failure rate under low-temperature conditions is reduced by 95%, meeting the operational needs of cold chain logistics. The explosion-proof circuit of the chemical explosion-proof scene adaptable component (compliant with AS / NZS2381 certification) can prevent the risk of explosion caused by circuit sparks. The high-strength explosion-proof shell (compressive strength ≥10MPa) can resist the impact and corrosion in the chemical scene. The impact resistance of the explosion-proof circuit is improved by 90%. In the vibration environment of the chemical workshop, the circuit failure rate is reduced by 85%, ensuring the safe operation of the motor in the hazardous environment.

[0029] like Figure 1 As shown, the electrical interface structure includes a terminal block assembly (model: 5XW.700.HL260170.JQ115001), an AMP connector (including a 282080-1 male, a 282110-1 female, and a 281934-2 waterproof plug), the tightening torque of the nuts on the terminal block is 10-12 N.m, the motor lead wires are fitted with Ø10 silicone tubes and the phase sequence is distinguished by a marking tube.

[0030] It should be noted that the standardized design of the terminal block assembly (5XW.700.HL260170.JQ115001) ensures neat wiring, and the 10-12 N.m nut tightening torque ensures that the contact resistance of the terminal block is ≤0.01Ω, avoiding overheating problems caused by poor contact and reducing the terminal burn-out rate by 90%. The waterproof plug (281934-2) design of the AMP connector (282080-1 male, 282110-1 female) enables the interface protection level to reach IP65, reducing the interface short circuit failure rate by 85% in humid or dusty environments; The Ø10 silicone tubing (temperature resistant to 180℃) of the motor leads protects them from high temperatures and mechanical wear. The design of the marking tube to distinguish the phase sequence (U, V, W) avoids incorrect phase sequence during wiring. The motor reversal fault caused by incorrect phase sequence is reduced by 100%, improving installation and maintenance efficiency.

[0031] like Figure 1 As shown, the fixing components include a front cover (model: 8XW.301.BYD522002.JQ090001), a rear cover plate (model: 8XW.305.ZL200100.JQ045001), a shaft retaining ring (specification: Ø30, Ø25), and a lifting eye (trivalent chromium material M81.2511). The protective components include domestic high-temperature grease bearings (model: 6208-ZZC3, 6207-ZZC3, temperature resistance 180℃) and a wave spring (specification: Ø72).

[0032] Specifically, the front and rear cover plates are made of high-strength aluminum alloy with a compressive strength of ≥200MPa, protecting the internal components of the motor from external impacts and reducing component damage rate by 70%. The axial fixing design of the shaft retaining ring prevents axial movement of the motor shaft during high-speed operation, with a movement amplitude of ≤0.05mm, ensuring transmission accuracy. The trivalent chromium material lifting ring has a load-bearing capacity of ≥50kg, facilitating motor installation and handling. Compared with ordinary lifting rings, its rust resistance is improved by 80%. The domestically produced high-temperature grease bearing can still maintain low-friction operation at 180℃, with a friction coefficient of ≤0.001, extending the bearing service life to more than 3 years. The elastic support design of Ø72 wave spring can compensate for the bearing installation clearance, avoiding vibration and noise caused by excessive clearance. The motor operating noise is ≤68dB, meeting the noise requirements of the storage environment.

[0033] like Figure 2 As shown, the rotor lamination is used in the aforementioned three-way stacking vehicle AC variable frequency motor. The rotor lamination is a silicon steel sheet stamping structure. The outer diameter of the rotor lamination matches the inner diameter of the stator core. A shaft hole is opened in the center. The inner wall of the shaft hole is provided with a keyway adapted to a type A flat key (specifications: 8712, 8725). The rotor lamination has 24 guide bar grooves evenly distributed around its circumference. The guide bar grooves have an inclined groove structure with an angle of 3°. The depth of the guide bar grooves is 1 / 3 of the radius of the rotor lamination. The rotor lamination has 4 positioning holes on its edge. The spacing between adjacent positioning holes is equal and is used for positioning and fixing during stacking.

[0034] Specifically, the rotor laminations are formed by stamping silicon steel sheets. The high permeability of silicon steel sheets (≥1.5T) can reduce the iron loss of the motor by 30%, improving the motor's energy efficiency. The precise matching of the outer diameter and the inner diameter of the stator core (gap ≤0.1mm) avoids the increase in magnetic reluctance caused by excessive air gap, improving the motor's power factor to over 0.92. The matching design of the shaft hole keyway and A-type flat key ensures the synchronous rotation of the rotor laminations and the shaft, achieving a transmission efficiency of 99%. The 24 circumferentially evenly distributed 3° inclined guide grooves can reduce harmonic losses during motor operation by 25%, while also suppressing electromagnetic noise, reducing noise by 5dB.

[0035] like Figure 2 As shown, the rotor lamination has a thickness of 0.35mm and is coated with a 0.02mm thick insulating coating. The guide bar groove has a trapezoidal cross-section with a groove opening width smaller than the groove bottom width and a rounded corner transition at the groove opening. The rotor lamination also has 6 heat dissipation through holes, which are located between the guide bar groove and the positioning hole, and are evenly distributed in a ring shape with a diameter of 3mm. The length of the rotor core formed by the stacking of the rotor laminations is compatible with L=225 in the rotor specification, and the stacking coefficient is ≥0.95.

[0036] Specifically, the trapezoidal structure of the guide bar groove (narrow opening, wide bottom) and rounded corner design facilitate the insertion and fixation of the guide bar, reducing the failure rate of guide bar loosening by 80%. The design of 0.35mm thickness and 0.02mm insulating coating reduces eddy current losses between laminations by 40%. The annular distribution of six 3mm heat dissipation holes increases the heat dissipation area of ​​the rotor core by 20% and reduces the core temperature by 15℃, preventing the decline in magnetic performance caused by high temperature. The design of a stacking factor ≥0.95 ensures the density of the rotor core (≥7.6g / cm³). 3 This improves the magnetic permeability and mechanical strength of the iron core, and the deformation rate of the rotor at high speed is ≤0.1%, meeting the motor's maximum speed requirement of 10,000 rpm.

[0037] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it.

Claims

1. An AC variable frequency motor for a three-way stacker truck, characterized in that, It includes a high-efficiency drive system, an intelligent control system, a special scene adaptation structure, and auxiliary support components. The high-efficiency drive system is connected to the intelligent control system and the auxiliary support components respectively. The intelligent control system interacts with the special scene adaptation structure via signals. The auxiliary support components provide installation, fixation, and protection support for each system. The high-efficiency drive system includes an AC variable frequency motor body, a transmission and braking coordination structure, and a heat dissipation structure. The AC variable frequency motor body realizes power output and braking control through the transmission and braking coordination structure, and the heat dissipation structure is wrapped around the AC variable frequency motor body. The intelligent control system includes an encoder assembly, an electronic control unit, and a monitoring and correction module. The encoder assembly is electrically connected to the electronic control unit, and the signal output terminal of the monitoring and correction module is connected to the electronic control unit. The electronic control unit and the AC variable frequency motor body form a closed-loop control. The special scenario adaptation structure includes a refrigeration scenario adaptation component and a chemical explosion-proof scenario adaptation component, which are respectively embedded in the key parts of the AC variable frequency motor body; The auxiliary support component includes an electrical interface structure, a fixing component, and a protective component. The electrical interface structure is connected to the signal terminal of the intelligent control system, and the fixing component is rigidly connected to the AC variable frequency motor body and the transmission and braking cooperation structure.

2. The AC variable frequency motor for a three-way stacker truck according to claim 1, characterized in that, The AC variable frequency motor is configured with a power of 50kW and includes a winding stator core and a rotor. The rotor is circumferentially fixed to the shaft by an A-type flat key. The outer circle of the stator core is sprayed with silver paint, and the shaft extension and end cover stop are coated with anti-rust oil.

3. The AC variable frequency motor for a three-way stacker truck according to claim 1, characterized in that, The transmission and braking coordination structure includes a gearbox, an electromagnetic brake, and a mechanical brake. The electromagnetic brake has a rated voltage of 80Vdc, a rated torque of ≥80N.m, a pull-in voltage of ≤56V, a release voltage of >1.8V, and a holding voltage of 64Vdc±10%. The electromagnetic brake and the mechanical brake form a three-stage braking system and are linked with the hydraulic system to achieve lateral stability control.

4. The AC variable frequency motor for a three-way stacker truck according to claim 1, characterized in that, The encoder assembly includes a plug-in type dual-coil absolute encoder and an encoder gear ring. The encoder outputs 64 square wave pulse signals per revolution. The electronic control unit is equipped with a controller whose continuous current is 1.2 times the rated current of the motor and adopts a modular design.

5. The AC variable frequency motor for a three-way stacker truck according to claim 1, characterized in that, The monitoring and correction module includes an infrared scanning array and a temperature sensor. When the infrared scanning array detects that the tray is tilted by more than 5%, it triggers the self-correction program of the electronic control unit. The temperature sensor is fixed by balancing putty, and the temperature signal is transmitted to the electronic control unit via an electrical interface.

6. The AC variable frequency motor for a three-way stacker truck according to claim 1, characterized in that, The cold storage scenario adaptation component includes low-temperature resistant and cold-proof materials and a low-temperature lubrication system. The chemical explosion-proof scenario adaptation component includes an explosion-proof circuit that complies with AS / NZS2381 certification and a high-strength explosion-proof shell. The impact resistance of the explosion-proof circuit is improved by 90%.

7. The AC variable frequency motor for a three-way stacker truck according to claim 1, characterized in that, The electrical interface structure includes a terminal block assembly and an AMP connector. The tightening torque of the nuts on the terminal block is 10-12 N·m. The motor lead wires are fitted with Ø10 silicone tubes and the phase sequence is distinguished by a marking tube.

8. The AC variable frequency motor for a three-way stacker truck according to claim 1, characterized in that, The fixing components include a front cover, a rear cover plate, a shaft retaining ring, and a lifting ring; the protective components include a domestically produced high-temperature grease bearing and a wave spring.

9. A rotor lamination, characterized in that, The rotor lamination is used in the three-way stacking vehicle AC variable frequency motor as described in any one of claims 1-8. The rotor lamination is a silicon steel sheet stamping structure. The outer diameter of the rotor lamination matches the inner diameter of the stator core. A shaft hole is opened in the center. The inner wall of the shaft hole is provided with a keyway adapted to a type A flat key. 24 guide bar grooves are evenly distributed around the rotor lamination. The guide bar grooves are inclined grooves with an angle of 3°. The depth of the guide bar grooves is 1 / 3 of the radius of the rotor lamination. 4 positioning holes are provided on the edge of the rotor lamination. The spacing between adjacent positioning holes is equal and is used for positioning and fixing during stacking.

10. The rotor lamination according to claim 9, characterized in that, The rotor laminations are 0.35mm thick and coated with a 0.02mm thick insulating coating. The guide bar grooves have a trapezoidal cross-section with a groove opening width smaller than the groove bottom width and a rounded corner transition at the groove opening. The rotor laminations also have 6 heat dissipation holes, which are located between the guide bar grooves and the positioning holes, and are evenly distributed in a ring shape with a diameter of 3mm. The length of the rotor core formed by the stacking of the rotor laminations matches the L=225 in the rotor specifications, and the stacking coefficient is ≥0.95.

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