A dual-motor symmetrically distributed bridge-type drive-control integrated elevator traction device

Abstract

The present invention discloses a dual-motor symmetrically distributed bridge-type drive-control integrated elevator traction device, comprising a motor front cover, a motor housing, a motor rear cover and a motor housing, wherein the motor front cover, the motor housing and the motor rear cover form a motor housing, a motor stator core is arranged inside the motor housing, an insulating frame with an induction coil is arranged inside the motor stator core, a motor permanent magnet and a motor rotor core are arranged inside the insulating frame with an induction coil, and a through hole is arranged inside the motor rotor core. Due to the dual-motor symmetrically distributed design, the present invention greatly reduces the volume of the motor and reduces the weight by about 40%, which greatly reduces the manufacturing cost of the motor.

Description

Technical Field

[0001] The invention relates to the technical field of elevators, in particular to a dual-motor symmetrically distributed bridge-type drive-control integrated elevator traction device. Background Art

[0002] The invention and use of elevators have a history of nearly a hundred years. The traction machine and drive system are called the heart of the elevator. Its performance directly determines the elevator's operating speed, starting comfort, safety, and long-term operating reliability.

[0003] The earliest vertical transport lifting mechanical devices were driven by human or animal power. It was not until 1889 that the American Otis Company took the lead in installing two electric elevators, using DC motors and worm gear drives for the first time, and created the basic transmission structure of elevators. It was not until 1900 that AC induction motors were used in the drive host system of elevators. In the same year, the Frenchman Bray installed the first gearless electric drive elevator. In 1903, the American Otis Company also produced gearless high-speed elevators. In the same year, the friction sheave was used instead of the drum in the formal elevator transmission mechanism. This greatly improved the versatility of the transmission mechanism, while reducing the size of the equipment and increasing safety. It has become the friction traction drive form currently widely used in elevators.

[0004] The development of traction machines in my country has gone through DC geared type, AC geared type, AC voltage regulation geared type, AC frequency conversion geared type, and permanent magnet synchronous gearless type.

[0005] 1. The current mainstream elevator traction motors in China and their advantages and disadvantages:

[0006] 1.1. The use of geared induction asynchronous motor traction machine is concentrated in the field of freight elevators with large traction torque. This type of traction machine system, due to the use of asynchronous motor drive, has a relatively low power factor, and has a gear reduction mechanism, which reduces the transmission efficiency and the complex transmission system, increasing the failure points of the entire elevator drive device.

[0007] 1.2. Synchronous permanent magnet gearless traction machine. This type of elevator traction machine system is recognized as the most energy-saving and efficient motor in the world. Due to the cancellation of the transmission turbine device and the use of direct drive, the failure points of the transmission mechanism are reduced and the efficiency of the system is improved. Its disadvantages are also quite obvious. The main ones are that it uses a multi-pole motor, the body is huge, the whole machine is overweight, and the efficiency of the whole machine is low due to the relatively low speed.

[0008] 2. The current traction machine and variable frequency drive system all adopt independent mode. The encoder needs to collect the speed signal through long-distance transmission, which causes signal distortion. The wire from the motor to the inverter is too long, causing the PWM high-frequency carrier to interfere with other electrical systems.

[0009] The original elevator car traction system has a topological structure such as Figure 1 As shown in the figure, the original elevator motion control system consists of an independent "inverter" that transmits the motor driving energy to the permanent magnet synchronous traction machine through the connecting wire in the middle. The traction machine pulls the car up and down according to the command. The speed signal of the traction machine is collected and encoded by the encoder installed at the end of the traction machine. The speed and position signals are transmitted to the PG card of the inverter through a connecting wire, and then sent to the CPU for calculation after decoding.

[0010] The existing system has the following disadvantages:

[0011] 1. The original traction motor, due to the need to produce low-speed and high torque characteristics, must adopt a 32-pole or 48-pole multi-pole design, which results in a relatively large diameter of the motor. Taking the most common permanent magnet synchronous traction motor as an example: the diameter is about 55 cm.

[0012] 2. As the motor is relatively large, the entire housing needs to be cast in cast iron, which makes the whole machine overweight. Together with the traction sheave, the whole machine weighs about 350kg. Such a heavy component not only incurs a lot of cost in transportation, but also requires large-tonnage lifting equipment when hoisting in the elevator shaft, which brings great trouble to the on-site construction and generates a lot of construction costs.

[0013] 3. As the permanent magnet synchronous motors are now single-sided, the wire rope is hung on the traction wheel on one side, which causes the traction machine to bear huge shear force from the side and below. In order to cope with this situation, large-diameter bearings are used to resist the influence of shear force, which will inevitably increase the weight of the motor and increase the manufacturing cost. In addition, due to the single-sided force, the motor often falls sideways due to the material of the motor bearing base or installation reasons, which brings potential harm to the safety of the elevator.

[0014] 4. Since the traction wheel of the existing synchronous motor is about 400 mm, the motor speed is relatively low, corresponding to a 1-ton elevator with a speed of 1.75 meters per second, the speed is 196 revolutions per minute, and the narrow speed regulation range increases the requirements for the frequency conversion control system and speed feedback encoding.

[0015] 5. In the current elevator traction system, a single inverter is basically used to drive a single permanent magnet synchronous traction machine. This mode has the following disadvantages: a long cable connection is required from the inverter to the motor. Since the inverters all modulate PWM voltage at 5-10K, they will cause interference and harmonic pollution to the surrounding electrical equipment and power supplies during the transmission process. In severe cases, errors in the speed feedback signal may occur, causing the elevator to stop operating.

[0016] 6. The application of permanent magnet synchronous motors in the elevator field must use high-precision encoders to collect speed signals and motor rotor absolute position signals in real time. The CPU is used for program calculations. Due to the long distance between the encoder and the inverter, a connecting line of about 10-20 meters is required. This makes it easy for signals to be distorted and lost during transmission. The signal is also easily interfered during transmission, which directly causes inverter failure. In more serious cases, it can cause serious problems such as flying cars, and the car rushing to the top or squatting at the bottom.

[0017] 7. Permanent magnet synchronous motors and frequency converters are basically wired and debugged at the installation site, which requires learning the motor parameters and rotation direction. Due to various reasons, manufacturers generally require learning at least three times. This not only increases the difficulty of debugging and prolongs the debugging time of the entire elevator. Once the motor parameter learning deviation is large, it will also affect the control effect of the frequency converter on the motor, and thus affect the starting comfort and running stability of the entire elevator. Summary of the invention

[0018] The object of the present invention is to provide a dual-motor symmetrically distributed bridge-type drive-control integrated elevator traction device to solve the problems raised in the above-mentioned background technology.

[0019] To achieve the above object, the present invention provides the following technical solutions:

[0020] A dual-motor symmetrically distributed bridge-type drive-control integrated elevator traction device comprises a motor front cover, a motor housing, a motor rear cover and a motor housing. The motor front cover, the motor housing and the motor rear cover form a motor housing. A motor stator core is arranged inside the motor housing. An insulating frame with an induction coil is arranged inside the motor stator core. A motor permanent magnet and a motor rotor core are arranged inside the insulating frame with the induction coil. A through hole is arranged inside the motor rotor core. A motor synchronous connection shaft is installed in the through hole. The motor synchronous A speed feedback photoelectric unit and a bearing fixing base are provided on one side of the step connection shaft passing through the rotor core of motor one, an IPM power drive board and a core control board are connected to the speed feedback photoelectric unit and the bearing fixing base, the IPM power drive board and the core control board are electrically connected, the other end of the motor synchronous connection shaft is connected to motor two through a bridge support base, motor two is installed inside the motor two housing and the rear cover plate of motor two, an insulating frame two with an induction coil, motor two permanent magnets and the rotor core of motor two are provided inside motor two, and a brake is also installed on the rear cover plate of motor two.

[0021] As a further technical solution of the present invention: the IPM power driver board adopts 7MBP75VDA120-50 intelligent power module, receives the PWM modulation signal of the core control board, modulates the DC bus voltage into a space vector voltage with varying pulse width, and drives the operation of the dual motors.

[0022] As a further technical solution of the present invention: the core control board adopts the TMS320F28374SZWTT signal processor.

[0023] As a further technical solution of the present invention: the front cover of the motor is a one-step formed structure using aluminum die-casting, and the housing of the motor is stretched using an aluminum profile mold.

[0024] As a further technical solution of the present invention: the speed feedback photoelectric unit adopts SIN, CON photoelectric encoders and corresponding components.

[0025] As a further technical solution of the present invention: the stator core of the motor is made of 50DW600 silicon steel sheet, which is formed by one-step die stamping. The total thickness of the stack is 130 mm, the diameter is 230 mm, and the inner hole diameter is 152 mm. The whole adopts 18 slots evenly distributed, each slot is distributed at 20 degrees, the outer ring size of the slot is 214 mm, and the winding entrance size is 3.2 mm. The isolation core between the slots is 10.5 mm.

[0026] As a further technical solution of the present invention: the insulating skeleton with the induction coil is made of GB / T7095 grade polyesterimide enameled wire with D=0.52 mm, temperature resistance level 180°C, and less than 2 pores per meter, which is wound in the internal cavity of the stator core to form an electromagnetic induction coil.

[0027] As a further technical solution of the present invention: the permanent magnet of the motor is made of NdFeB NH38 material and has an arc design.

[0028] As a further technical solution of the present invention: the motor rotor core adopts a dovetail groove design. The material is 50DW600, and the die is stamped and formed in one step. The laminations are crimped and then welded and fixed. The rotor thickness is 130 mm, the rotor diameter is 148 mm, the dovetail groove depth is 3 mm, the internal inverted slope is 15 degrees, and the inner hole diameter is 55 mm.

[0029] As a further technical solution of the present invention: the motor synchronous connecting shaft connects two symmetrically installed permanent magnet synchronous motors in series, one side of the motor synchronous connecting shaft is CNC-machined into a plane, the left side is inserted into the motor rotor mounting hole of motor one, the right side is inserted into the motor rotor core mounting hole of motor two, and the middle part is inserted into the traction wheel.

[0030] Compared with the prior art, the present invention has the following beneficial effects: 1. Due to the adoption of a dual-motor symmetrical distribution design, the volume of the motor is greatly reduced, and the weight is reduced by about 40%, which greatly reduces the manufacturing cost of the motor.

[0031] 2. The dual-motor coaxial traction method distributes power evenly to the left and right motors, and applies torque at both ends of the shaft. This reduces the load on the traction shaft and greatly reduces the risk and danger of the traction machine shaft breakage, as well as the economic losses caused by it.

[0032] 3. The integrated device adopts a left-right symmetrical distribution, with similar weight on the left and right sides. The bridge-type base supports thin strips, which is very convenient for installation now. No large lifting equipment is required. It is especially suitable for outdoor home elevators, saving a lot of installation costs and construction time.

[0033] 4. In this device, the motor adopts an 8-pole design, and the motor speed is increased from the traditional 196 rpm to 669 rpm. The overall efficiency of the motor reaches more than 94.8%, which is more efficient and greener than the original traction machine system. Due to the increase in motor speed, the speed regulation range of the control system is wider, which has a better effect on the comfort of motor startup and the stability of operation.

[0034] 5. The integrated device, the frequency conversion control unit, is located at the rear end of the motor. The leads of the motor coil are directly connected to the inverter power board PCB UVW. This integrated structure saves about ten meters of motor connection wires for each unit. Based on 800,000 units, 8 million meters of 4-core 16 square cables can be saved each year. Since there is no connection wire between the motor and the inverter, the interference problem caused by the cable does not exist, which greatly reduces the EMI of the whole machine. Reduce the interference of the system to the outside world.

[0035] 6. Speed ​​feedback unit. The device of the present invention has a speed feedback unit with completely independent intellectual property rights embedded in it. The optical component is fixed at the end of the motor. The optical decoding unit is directly arranged on a PCB with the inverter control unit. The AB orthogonal speed signal, the original encoder has only 2048 lines / turn, and the device has 131072 lines / turn, and the accuracy is improved by 64 times. The sine degree and distortion rate of the absolute position CD signal are better than those of the original encoder.

[0036] 7. The speed feedback unit is installed in an integrated manner, eliminating the connection between the encoder and the inverter, saving about 10 million meters of 14-core shielded wire per year. The plugs at both ends are removed, eliminating the faults and dangers caused by loose or oxidized connectors, and also eliminating the problems caused by interference with the wires.

[0037] 8. The all-in-one device adopts IP64 grade sealing, which prevents the damage to the motor and frequency conversion drive from external moisture, sulfur dioxide and other corrosive gases, prevents the damage caused by water ingress during thunderstorms or accidental splashing of the elevator, and improves the reliability of the entire elevator system.

[0038] 9. The integrated device adopts an aluminum die-casting integrated structure, which is not only strong, but also has excellent heat dissipation effect and can adapt to the environment of -40-70℃, thus improving the applicability and reliability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a topological diagram of the prior art.

[0040] Figure 2 It is a schematic diagram of the present invention.

[0041] Figure 3 It is an overall diagram of the present invention.

[0042] Figure 4 yes Figure 3 Cross-section at AA.

[0043] Figure 5 for Figure 3 Cross-section at BB.

[0044] Figure 6 for Figure 3 Cross-section view at CC.

[0045] In the figure: 1. Motor 1 rear cover; 2. Motor 1 housing; 3. Core control board; 4. IPM power drive board; 5. Speed ​​feedback photoelectric unit and bearing fixing base; 6. Motor 1 stator core; 7. Insulation frame 1 with induction coil; 8. Motor 1 permanent magnet; 9. Motor 1 rotor core; 10. Motor synchronous connecting shaft; 11. Motor 1 front cover; 12. Bridge support base; 13. Motor 2; 14 Motor 2 housing; 15. Motor 2 stator core; 16. Insulation frame 2 with induction coil; 17. Motor 2 permanent magnet; 18. Motor 2 rotor core; 19. Motor 2 rear cover; 20. Brake. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] See also Figure 2-6Embodiment 1: A dual-motor symmetrically distributed bridge-type drive-control integrated elevator traction device, comprising a motor front cover plate 11, a motor housing 2, a motor rear cover plate 1 and a motor housing 14, wherein the motor front cover plate 11, the motor housing 2 and the motor rear cover plate 1 form a motor housing, wherein a motor stator core 6 is provided inside the motor housing, wherein an insulating skeleton 7 with an induction coil is provided inside the motor stator core 6, wherein a motor permanent magnet 8 and a motor rotor core 9 are provided inside the insulating skeleton 7 with the induction coil, wherein a through hole is provided inside the motor rotor core 9, wherein a motor synchronous connecting shaft 10 is installed in the through hole, wherein the motor synchronous connecting shaft 10 is provided with a speed feedback photoelectric unit and a bearing fixing base 5 on one side passing through the rotor core 9 of the motor one, and the speed feedback photoelectric unit and the bearing fixing base 5 are connected with an IPM power drive board 4 and a core control board 3, and the IPM power drive board 4 and the core control board 3 are electrically connected. The other end of the motor synchronous connection shaft 10 is connected to the motor two 13 through a bridge support base 12, and the motor two 13 is installed inside the motor two housing 14 and the motor two rear cover plate 19. The interior of the motor two 13 is provided with an insulating frame two 16 with an induction coil, a motor two permanent magnet 17 and a motor two rotor core 18, and a brake 20 is also installed on the motor two rear cover plate 19.

[0048] Among them: the specific production method and function of each component are as follows:

[0049] The IPM power driver board 4 adopts the 7MBP75VDA120-50 intelligent power module, receives the PWM modulation signal from the core control board 3, modulates the DC bus voltage into a space vector voltage with varying pulse width, and drives the operation of the dual motors.

[0050] The core control board 3 uses the TMS320F28374SZWTT signal processor, which has a CPU frequency of up to 200M, a flash memory space of 512KB, a dynamic storage of 132KB, and abundant peripheral resources, such as CAN bus, UART, QEP, EPWM, and ADC. The CPU runs a dedicated program for motor control to achieve control of the dual permanent magnet synchronous motor.

[0051] The speed feedback photoelectric unit and the bearing fixing base 5 use SIN, CON photoelectric encoders and corresponding components, which are installed behind the bearing base. After the interior of the load-bearing base is CNC precision-machined, the bearing of the fixed synchronous shaft can be installed inside the bearing by sliding mode, and then locked with a bolt lock, and the speed feedback unit at the rear is connected to the synchronous shaft.

[0052] The front cover plate 11 of the motor is a one-step formed structure made of aluminum die-casting. Its main function is the back cover of the motor housing. The inside of the back cover and the middle of the bearing load-bearing base form a cavity for installing the electronic control part of the inverter. The motor housing 2 is stretched by an aluminum profile mold, and then the inside is processed by a CNC machining center for installing the stator core assembly and the frequency conversion drive assembly.

[0053] The stator core 6 of the motor is made of 50DW600 silicon steel sheet, which is formed by one-step die stamping. The total thickness of the stack is 130 mm, the diameter is 230 mm, and the inner hole diameter is 152 mm. The whole adopts 18 slots evenly distributed, each slot is distributed at 20 degrees, the outer ring size of the slot is 214 mm, and the winding entrance size is 3.2 mm. The isolation core between the slots is 10.5 mm.

[0054] The insulating skeleton with induction coil 7 is made of GB / T7095 grade polyester imide enameled wire with D=0.52mm, temperature resistance level 180℃, and less than 2 pores per meter. It is wound in the internal cavity of the stator core to form an electromagnetic induction coil, which is responsible for converting the pulse width modulation PWM chopping voltage sent by the IPM into the corresponding electromagnetic force. The insulating skeleton is made of nylon and polyurethane material, and is molded by high temperature and high pressure injection molding. Its function is to block the enameled wire and the stator core, and play the role of pressure resistance and insulation.

[0055] The permanent magnet 8 of the motor is made of NdFeB NH38 material and has an arc design. In the topological structure of straight slot and straight magnet, the permanent magnet can follow the rotating magnetic field of the coil, drive the synchronous shaft to rotate, and realize the conversion of electrical energy to mechanical energy. The parabolic design of the permanent magnet and the design of the straight slot and straight magnet make the copper loss and iron loss of the motor significantly reduced compared with the manual offline process of the inclined slot. Before installing the permanent magnet, evenly apply anaerobic glue on the bottom, and then insert it into the slot of the rotor core along the dovetail slot. After the glue solidifies, the permanent magnet is firmly bonded to the inside of the dovetail slot.

[0056] The rotor core 9 of the motor adopts a dovetail groove design. The material is 50DW600, which is formed by one-time die stamping, and the laminations are welded after crimping. The rotor thickness is 130 mm, the rotor diameter is 148 mm, the dovetail groove depth is 3 mm, the internal inverted slope is 15 degrees, and the inner hole diameter is 55 mm.

[0057] The motor synchronous connection shaft 10 connects two symmetrically mounted permanent magnet synchronous motors in series. One side of the motor synchronous connection shaft 10 is CNC machined into a plane. The left side is inserted into the motor rotor mounting hole of the motor 1, the right side is inserted into the motor rotor core mounting hole of the motor 2, and the middle part is inserted into the traction wheel. Since the mechanical model of the shaft is a beam and it needs to rotate to transmit torque, its stress is usually symmetrically cyclic, so ductile iron is first cast and then machined into a finished shaft.

[0058] The motor first front cover plate 11 has a bearing and is an aluminum die-casting one-step forming structure. Its main function is the front cover plate of the motor first housing. In the middle of the cover plate, a CNC-processed bearing installation hole is provided.

[0059] The bridge support base 12 is cast by a ductile iron mold, and a permanent magnet motor 1 and a brake are installed on the left side. A drive motor 2 is installed on the right side, and a variable frequency speed regulation integrated system is built in the rear end of the motor 2, forming a left-right symmetrical bridge installation.

[0060] The front cover plate of the second motor is an aluminum die-cast one-time formed structure with a bearing. Its main function is the front cover plate of the second motor housing. In the middle of the cover plate, a CNC-processed bearing installation hole is provided.

[0061] The housing 14 of the second motor is stretched by an aluminum profile mold, and then the interior is processed by a CNC machining center for installing the stator core of the second motor.

[0062] The second stator core 15 of the motor is made of 50DW600 silicon steel sheet, and the specific parameters of the mold stamping are as follows:

[0063] The total thickness of the lamination is 130 mm, the diameter is 230 mm, and the inner diameter is 152 mm. The overall 18 slots are evenly distributed, each slot is distributed at 20 degrees, the outer ring size of the slot is 214 mm, and the winding entrance size is 3.2 mm. The isolation core between the slots is 10.5 mm.

[0064] Its function is the same as that of a stator core of an electric motor.

[0065] The insulating skeleton with induction coil 216 is made of industrial grade (GB / T7095) polyester imide enameled wire with D=0.52mm, temperature resistance level 180℃, and less than 2 pores per meter. It is wound in the internal cavity of the stator core to form an electromagnetic induction coil, which is responsible for converting the pulse width modulation PWM chopping voltage sent by the IPM into the corresponding magnetic field. The insulating skeleton is made of nylon and polyurethane material, and is molded by high temperature and high pressure injection molding. Its function is to block the enameled wire and the stator core, and play the role of pressure resistance and insulation.

[0066] The second permanent magnet 17 of the motor adopts the arc design of NdFeB NH38 material and is one of the core components of the device.

[0067] The permanent magnet with arc design can follow the rotating magnetic field of the coil in the topological structure of straight slot and straight magnet, drive the synchronous shaft to rotate, and realize the conversion of electrical energy to mechanical energy. The parabolic design of the permanent magnet and the design of straight slot and straight magnet make the copper loss and iron loss of the motor significantly lower than the manual offline loss of the inclined slot. Before installing the permanent magnet, evenly apply anaerobic glue on the bottom, and then insert it into the slot of the rotor core along the dovetail slot. After the glue solidifies, the permanent magnet is firmly bonded to the inside of the dovetail slot.

[0068] The second rotor core 18 of the motor adopts a dovetail groove design. The material is 50DW600, and it is formed by one-step die stamping. The laminations are crimped and then welded to fix. This structure can prevent the permanent magnet from being thrown out by centrifugal force when rotating at high speed. The specific parameters are as follows:

[0069] The rotor thickness is 130 mm, the rotor diameter is 148 mm, the dovetail groove depth is 3 mm, the internal slope is 15 degrees, and the inner hole diameter is 55 mm.

[0070] The rear cover plate 19 of the device is a one-step aluminum die-casting structure, which mainly serves as the rear cover of the second housing of the motor. A shaft extends out from the rear of the rear cover to connect the brake.

[0071] The brake 20 is an outsourced part, which is connected to the brake through the shaft extending from the rear cover plate to provide braking and braking force for the device when needed.

[0072] Its working principle is as follows Figure 2 As shown in the figure, the 36V AC power supply from the AC isolation transformer of the control cabinet passes through the AC / DC switching power supply to output +5V, +15V -15V 24V and other power supplies required by the control and drive systems, and supplies the central processor TMS320F28374SZWTT, which runs the core drive algorithm to issue the PWM modulation signal of the dual permanent magnet synchronous motor. After the signal is optically isolated, it drives the intelligent power module to modulate the DC bus voltage into the space vector voltage required by the rotating magnetic field of the motor.

[0073] The 537V DC bus voltage rectified in the control cabinet is connected to the invention device through wires, and provides driving power for the system through DC inductors and filter capacitors.

[0074] Under the control of the central processor, the permanent magnet synchronous motor starts and runs according to instructions, driving the car to move through the synchronous shaft and traction pulley.

[0075] The speed feedback unit installed at the end of the motor collects and processes the real-time speed signal, running direction signal, motor rotor position signal, and rotor absolute position signal of the motor, and directly sends it to the signal acquisition unit corresponding to the CPU to obtain the current signal for program operation.

[0076] Example 2, based on Example 1, the speed feedback photoelectric unit and the bearing fixing base 5 are the sine and cosine speed feedback units developed by the system. The specific parameters are as follows:

[0077] The single-turn output realizes AB 90-degree orthogonal 131072 lines / turn, which is 64 times the output of 2048 lines / turn of the German Dehan 1387 (special for elevators) encoder. The improvement in accuracy is very beneficial to the control accuracy of the control program at the low frequency of the traction motor, and the comfort of the car start and stop is greatly improved. The feedback unit also outputs the single-turn absolute position Z signal and the rotor position orthogonal 90-degree C and D signals.

[0078] The decoding circuit of the speed feedback unit is integrated with the core control board of the central processor. The AB quadrature encoding signal of the speed feedback signal and the single-turn absolute value Z signal are directly connected to the QEP input line of the TMS320F28374SZWTT through PCB wiring. The rotor position quadrature CD signal is directly connected to the 12-bit sampling accuracy ADC pin of the TMS320F28374SZWTT through PCB wiring. This design completely eliminates the disadvantages of the traditional encoder plug cable transmission, greatly improving the reliability of the system and the safety of long-term operation.

[0079] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0080] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A dual-motor symmetrically distributed bridge-type drive-control integrated elevator traction device, comprising a motor first front cover plate (11), a motor first housing (2), a motor first rear cover plate (1) and a motor second housing (14), It is characterized in that The motor-front cover plate (11), the motor-housing (2), and the motor-rear cover plate (1) form a motor-housing, wherein a motor-stator core (6) is arranged inside the motor-housing, an insulating frame (7) with an induction coil is arranged inside the motor-stator core (6), a motor-permanent magnet (8) and a motor-rotor core (9) are arranged inside the insulating frame (7) with the induction coil, a motor-rotor core (9) is arranged inside the motor-rotor core (9), a through hole is arranged inside the motor-rotor core (9), a motor-synchronous connecting shaft (10) is installed in the through hole, a speed feedback photoelectric unit and a bearing fixing base (5) are arranged on one side of the motor-synchronous connecting shaft (10) passing through the motor-rotor core (9), an IPM power drive board (4) and a core control board (3) are connected to the speed feedback photoelectric unit and the bearing fixing base (5), and the IPM power drive board (4) and the core control board (3) are connected to the IPM power drive board (4) and the core control board (3) ), the other end of the motor synchronous connection shaft (10) is connected to the motor 2 (13) through the bridge support base (12), the motor 2 (13) is installed inside the motor 2 housing (14) and the motor 2 rear cover (19), the motor 2 (13) is provided with an insulating frame 2 (16) with an induction coil, a motor 2 permanent magnet (17) and a motor 2 rotor core (18), and a brake (20) is also installed on the motor 2 rear cover (19), the IPM power drive board (4) adopts a 7MBP75VDA120-50 intelligent power module, receives a PWM modulation signal from the core control board (3), modulates the DC bus voltage into a space vector voltage with a pulse width variation, and drives the operation of the dual motors, the core control board (3) adopts a TMS320F28374SZWTT signal processor.

2. A dual-motor symmetrically distributed bridge-type drive-control integrated elevator traction device according to claim 1, It is characterized in that The motor-1 front cover plate (11) is a one-step formed structure formed by aluminum die casting, and the motor-1 housing (2) is stretched by an aluminum profile mold.

3. A dual-motor symmetrically distributed bridge-type drive-control integrated elevator traction device according to claim 1, It is characterized in that The speed feedback photoelectric unit and the speed feedback photoelectric unit in the bearing fixing base (5) adopt SIN, CON photoelectric encoders and corresponding components.

4. A dual-motor symmetrically distributed bridge-type drive-control integrated elevator traction device according to claim 1, It is characterized in that The stator core (6) of the motor is made of 50DW600 silicon steel sheets, which are formed by one-step die stamping. The total thickness of the stack is 130 mm, the diameter is 230 mm, the inner hole diameter is 152 mm, and 18 slots are evenly distributed. Each slot is distributed at 20 degrees. The outer ring size of the slot is 214 mm, the winding inlet size is 3.2 mm, and the isolation core between the slots is 10.5 mm.

5. A dual-motor symmetrically distributed bridge-type drive-control integrated elevator traction device according to any one of claims 1 to 4, It is characterized in that The insulating frame (7) with the induction coil is made of GB / T7095 grade polyesterimide enameled wire with D=0.52 mm, temperature resistance level 180°C, and less than 2 pores per meter, which is wound in the internal cavity of the stator core to form an electromagnetic induction coil.

6. A dual-motor symmetrically distributed bridge-type drive-control integrated elevator traction device according to claim 1, It is characterized in that The motor has a permanent magnet (8) made of NdFeB NH38 material and has an arc-shaped design.

7. A dual-motor symmetrically distributed bridge-type drive-control integrated elevator traction device according to claim 1, It is characterized in that The motor rotor core (9) adopts a dovetail groove design, is made of 50DW600, is formed by one-step die stamping, and is welded and fixed after lamination crimping. The rotor thickness is 130 mm, the rotor diameter is 148 mm, the dovetail groove depth is 3 mm, the internal inclination is 15 degrees, and the inner hole diameter is 55 mm.

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