High-temperature-resistant direct-current coreless permanent-magnet direct-current brushless slotless motor

Abstract

The invention relates to the technical field of permanent-magnet direct-current brushless slotless motors, in particular to a high-temperature-resistant direct-current coreless permanent-magnet direct-current brushless slotless motor, which comprises a front cover assembly connected with a stator and a rotor and used for protecting the high-temperature direct-current coreless permanent-magnet direct-current brushless slotless motor; the stator is connected with the front cover assembly, the rear cover assembly, the rotor and the Hall plate assembly, and is used for generating a rotating magnetic field and driving the rotor to rotate; the rotor is connected with the front cover assembly, the stator, the Hall plate assembly and the rear cover assembly one by one and used for converting electric energy into mechanical energy and outputting the mechanical energy; the Hall plate assembly is connected with the stator and the rear cover assembly and is used for detecting the position of the rotor and providing a control signal for the motor controller; and the rear cover assembly is connected with the stator and the rotor and is used for protecting the high-temperature direct-current coreless permanent magnet direct-current brushless slotless motor. The adaptive temperature of the permanent magnet direct current brushless slotless motor to the working environment is improved.

Description

Technical Field

[0001] The invention relates to the technical field of permanent magnet direct current brushless slotless motors, and in particular to a high temperature resistant direct current coreless cup permanent magnet direct current brushless slotless motor. Background Art

[0002] In recent years, with the development of science and technology, especially the breakthroughs in materials science, power electronics technology, control theory and other fields, the research and development and application of DC hollow cup permanent magnet DC brushless slotless motors have become possible. DC hollow cup permanent magnet DC brushless slotless motors meet the global demand trend for energy efficiency improvement, equipment miniaturization, lightweight and high performance. In high-tech fields such as aerospace, new energy vehicles, industrial robots, precision medical equipment, military equipment, etc., there is a strong demand for small, light and high-output motors. The DC hollow cup permanent magnet DC brushless slotless motor project can meet the urgent needs of the development of these industries.

[0003] Chinese patent announcement number: CN101673989B discloses a precision hollow cup DC permanent magnet brushless slotless motor, including a stator assembly and a rotor assembly, the rotor assembly is arranged inside the stator assembly, the rotor assembly includes a rotating shaft, a commutator, a fixing part and a coil, the rotating shaft is fixed in the fixing part, the commutator has a through hole, the rotating shaft is inserted in the through hole, the coil is fixed on the outside of the fixing part, there is a gap between the coil and the stator assembly, and the chemical composition of the commutator is composed of Au: 4-8%; Ag: 90-95%; Pd: 0.5-2%; Ni: 0.5-1% by weight. However, this solution is difficult to improve the working efficiency of the permanent magnet DC brushless slotless motor in a high temperature environment of 200°C. Summary of the invention

[0004] To this end, the present invention provides a high temperature resistant DC hollow cup permanent magnet DC brushless slotless motor to overcome the problem in the prior art that it is difficult to improve the working efficiency of the permanent magnet DC brushless slotless motor in a high temperature environment of 200°C.

[0005] To achieve the above object, the present invention provides a high temperature resistant DC hollow cup permanent magnet DC brushless slotless motor, comprising:

[0006] A front cover assembly connected to the stator and the rotor, used to protect the high-temperature DC coreless permanent magnet DC brushless slotless motor and prevent impurities from entering the high-temperature DC coreless permanent magnet DC brushless slotless motor;

[0007] The stator is connected to the front cover assembly, the rear cover assembly, the rotor and the Hall plate assembly, and is used to generate a rotating magnetic field and drive the rotor to rotate;

[0008] A rotor, which is connected to the front cover assembly, the stator, the Hall plate assembly and the rear cover assembly one by one, and is used to convert electrical energy into mechanical energy and output the mechanical energy;

[0009] The wire ring is connected to the stator, the Hall plate assembly, and the cross-slot pan head screw to support the components and stabilize the internal structure;

[0010] A Hall plate assembly connected to the stator and the back cover assembly for detecting the position of the rotor and providing a control signal to the motor controller;

[0011] Cross recessed pan head screws, which are connected to the stator, the wire ring, and the rear cover assembly to support the internal structure;

[0012] Cross recessed pan head screws, which are connected to the stator and Hall plate assembly and are used to support the internal structure;

[0013] The rear cover assembly is connected to the stator and the rotor, and is used to protect the high-temperature DC hollow cup permanent magnet DC brushless slotless motor and prevent impurities from entering the high-temperature DC hollow cup permanent magnet DC brushless slotless motor.

[0014] Furthermore, the workflow includes:

[0015] Step G1, the position detector detects the magnetic pole signal of the rotor and transmits the magnetic pole signal to the controller;

[0016] Step G2, the controller performs logic processing on the magnetic pole signal to obtain a switch signal;

[0017] Step G3, the switch signal triggers the power switch devices in the inverter in a preset order;

[0018] Step G4: The power switch device in the inverter distributes the power supply to each phase winding of the motor according to a preset logical relationship, so that the motor rotates and generates continuous torque.

[0019] Furthermore, deep groove ball bearings are provided in the front cover assembly and the rear cover assembly, and the design parameters of the deep groove ball bearings are set as follows: radial force Fr=15 (N), axial force Fa=2 (N), journal diameter d1=4 (mm), rotation speed n=9000 (r / min), required life Lh'=50000 (h), temperature coefficient ft=1, and lubrication method is grease lubrication.

[0020] Furthermore, the stator comprises:

[0021] A casing connected to the stator core and used to fix the stator core;

[0022] The stator core, whose outer end is connected to the casing and whose inner end is connected to the insulating paper, is used to concentrate and enhance the rotating magnetic field;

[0023] Insulating paper, one end of which is connected to the stator core and the other end is connected to the winding, and is used to increase the insulation distance between the winding and the stator core;

[0024] The winding, which is connected to the insulating paper, is used to generate a rotating magnetic field and drive the rotor to rotate.

[0025] Furthermore, in the stator core, the stator core structure is set to be a slotless structure, the material is 20WTG1500 electrical cold-rolled silicon steel sheet, and is bonded to the casing using a two-component epoxy adhesive.

[0026] Furthermore, in the insulating paper, the insulating paper material is set to be a 6650 composite material with a thickness of 0.15 mm;

[0027] In the winding, the winding material is set to be hot air self-adhesive wire with a temperature resistance level of 220°C, the winding and both ends of the stator core are sealed with epoxy glue, and the casing material is 316 stainless steel.

[0028] Furthermore, the rotor comprises:

[0029] A bearing, which is connected to the magnetic steel, the outer balance ring and the sensor magnetic steel one by one, and is used to support the rotation of the magnetic steel, the outer balance ring and the sensor magnetic steel;

[0030] The inner balance ring is connected to the bearing and the magnet to reduce the vibration and imbalance of the rotor when it rotates at high speed;

[0031] A magnetic steel connected with the bearing, the inner balance ring and the outer balance ring to convert electrical energy into mechanical energy and output the mechanical energy;

[0032] An outer balancing ring, which is connected to the bearing, the magnet and the sensor magnet to reduce the vibration and imbalance of the rotor when it rotates at high speed;

[0033] The sensor magnet is installed on the outer balance ring and is used to detect the working parameters of the high temperature resistant DC hollow cup permanent magnet DC brushless slotless motor.

[0034] Furthermore, in the rotor, the magnetic steel material is set to be N45AH sintered NdFeB magnetic steel, the length is 28 mm, the inner balance ring and the outer balance ring are made of brass H62, and the bearing material is stainless round steel 2Cr13.

[0035] Furthermore, the Hall plate assembly comprises:

[0036] A wire passing ring, which is connected to the Hall sensor and is used to protect the winding passing through the housing;

[0037] The Hall sensor is connected to the wire ring and the circuit board and is used to detect the speed, position and magnetic field change of the high temperature resistant DC hollow cup permanent magnet DC brushless slotless motor;

[0038] A circuit board, which is connected to the Hall sensor and the lead wire, and is used to process the electrical signal generated by the Hall sensor and output the processed electrical signal;

[0039] The lead wire is connected to the circuit board and is used to transmit the processed electrical signal to the permanent magnet DC brushless slotless motor control system.

[0040] Furthermore, in the Hall plate assembly, the temperature resistance of the Hall plate is 200°C, the Hall sensor is mounted on the circuit board, and the lead wire is connected to the circuit board by soldering and spot welding. The wire ring material is polyetheretherketone with a temperature resistance grade of 250°C, the Hall sensor material is a Hall switch, the copper foil width in the Hall circuit is 0.3mm, and the current density is 2.38A / mm 2 The copper foil thickness of the circuit board is 6 ounces, the winding is a line-petal hollow cup winding, the circuit copper foil width is 0.6mm, and the current density is 15.87A / mm 2 .

[0041] Compared with the prior art, the beneficial effects of the present invention are that the device ensures that the motor can still work stably in a high temperature environment of 200°C and prolongs its service life by adopting special materials and designs. The device provides accurate position feedback through the Hall plate assembly, so that the motor controller can achieve high-precision speed and position control. The device makes the motor structure more compact through the design of a hollow cup rotor, which is convenient for installation and use in a limited space. The device reduces the noise and vibration of the motor during operation and improves the user experience through precise manufacturing and balancing technology. The device makes the maintenance and replacement of parts of the motor simpler and faster through modular design, and improves the adaptability of the permanent magnet DC brushless slotless motor to the working environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 This is a schematic diagram of the structure of the high temperature resistant DC hollow cup permanent magnet DC brushless slotless motor of this embodiment;

[0043] Figure 2 Schematic diagram of the structure of the stator of this embodiment;

[0044] Figure 3 Schematic diagram of the structure of the rotor of this embodiment;

[0045] Figure 4 Schematic diagram of the structure of the Hall plate assembly of this embodiment. DETAILED DESCRIPTION

[0046] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0047] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0048] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0049] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] See also Figure 1 As shown, it is a structural schematic diagram of the high temperature resistant DC hollow cup permanent magnet DC brushless slotless motor of this example, and the device includes:

[0051] A front cover assembly 1, which is connected to the stator 2 and the rotor 3, and is used to protect the high-temperature DC hollow cup permanent magnet DC brushless slotless motor and prevent impurities from entering the high-temperature DC hollow cup permanent magnet DC brushless slotless motor;

[0052] The stator 2 is connected to the front cover assembly 1, the rear cover assembly 8, the rotor 3 and the Hall plate assembly 5, and is used to generate a rotating magnetic field and drive the rotor 3 to rotate;

[0053] The rotor 3 is connected to the front cover assembly 1, the stator 2, the Hall plate assembly 5 and the rear cover assembly 8 one by one, and is used to convert electrical energy into mechanical energy and output the mechanical energy;

[0054] The wire passing ring 4 is connected with the stator 2, the Hall plate assembly 5, and the cross slot pan head screw 6, and is used to support the components and stabilize the internal structure;

[0055] A Hall plate assembly 5 connected to the stator 2 and the rear cover assembly 8 for detecting the position of the rotor 3 and providing a control signal for a motor controller (not shown);

[0056] Cross recessed pan head screw 6, which is connected with stator 2, wire ring 4, and rear cover assembly 8, and is used to support the internal structure;

[0057] Cross recessed pan head screw 7, which is connected to the stator 2 and the Hall plate assembly 5, and is used to support the internal structure;

[0058] The rear cover assembly 8 is connected to the stator 2 and the rotor 3 and is used to protect the high-temperature DC hollow cup permanent magnet DC brushless slotless motor and prevent impurities from entering the high-temperature DC hollow cup permanent magnet DC brushless slotless motor.

[0059] Specifically, the high-temperature DC hollow cup permanent magnet DC brushless slotless motor is applied to the field of permanent magnet DC brushless slotless motor. After the device receives the start signal, the power supply is supplied to the stator, and a rotating magnetic field is generated inside the stator through the electromagnetic induction principle. The device detects the position of the rotor in real time through the Hall plate component, and feeds back the position information to the motor controller. The device calculates and outputs the corresponding control signal to the stator on the motor controller through the position information provided by the Hall plate component, and adjusts the intensity and direction of the rotating magnetic field. The device starts to rotate when the magnetic steel in the rotor is subjected to the magnetic force, converting electrical energy into mechanical energy. The device protects the inside of the motor from external impurities through the front cover component and the rear cover component. At the same time, the motor may also be integrated with Protection elements such as temperature sensors are used to monitor the motor temperature and take protective measures when necessary. The device adopts special materials and designs to ensure that the motor can still work stably in a high temperature environment and extend its service life. The device provides accurate position feedback through the Hall plate assembly, so that the motor controller can achieve high-precision speed and position control. The device makes the motor structure more compact through the design of a hollow cup rotor, which is convenient for installation and use in a limited space. The device reduces the noise and vibration of the motor during operation and improves the user experience through precise manufacturing and balancing technology. The device makes the maintenance and replacement of parts of the motor simpler and faster through modular design, and improves the adaptability of the permanent magnet DC brushless slotless motor to the working environment.

[0060] Specifically, in the high temperature DC coreless permanent magnet DC brushless slotless motor, the working process includes:

[0061] Step G1, the position detector detects the magnetic pole signal of the rotor and transmits the magnetic pole signal to the controller;

[0062] Step G2, the controller performs logic processing on the magnetic pole signal to obtain a switch signal;

[0063] Step G3, the switch signal triggers the power switch devices in the inverter in a preset order;

[0064] Step G4: The power switch device in the inverter distributes the power supply to each phase winding of the motor according to a preset logical relationship, so that the motor rotates and generates continuous torque.

[0065] Specifically, the position detector refers to a component used to detect the position of the rotor pole relative to the stator winding, the pole signal refers to an electrical signal detected by the position detector and indicating the position of the rotor pole relative to the stator winding, the controller refers to a motor controller used to receive an external control signal and output a corresponding control signal to the motor after internal logic processing, the logic processing refers to the process of processing the input signal inside the controller, such as signal de-jittering, signal amplification, filtering and decoding, the switch signal refers to a control signal output by the controller for controlling the on-off state of the power switch device, and the power switch device refers to a power device used in an inverter circuit to convert direct current into alternating current by controlling the on-off state of the inverter circuit. The electronic device, the inverter refers to a device that converts direct current into alternating current, the preset sequence refers to the predefined sequence of the switching signals triggering the power switching devices in the inverter, the preset logical relationship refers to the pre-set relationship of correlation and dependence between the power of the power supply and the windings of each phase of the motor, the impurities refer to substances that should not exist in the high-temperature DC hollow cup permanent magnet DC brushless slotless motor and are harmful to its normal operation, such as dust, moisture, chemical gas, metal debris, non-metallic particles and oil, the rotating magnetic field refers to the magnetic field in which the magnetic induction vector rotates at a fixed frequency in space, the motor controller refers to an electronic device used to control the operation of the motor, and the control signal refers to an electrical signal used to control the operating state and parameters of the motor.

[0066] Specifically, deep groove ball bearings are provided in the front cover assembly and the rear cover assembly, and the design parameters of the deep groove ball bearings are set as follows: radial force Fr=15 (N), axial force Fa=2 (N), journal diameter d1=4 (mm), rotation speed n=9000 (r / min), required life Lh'=50000 (h), temperature coefficient ft=1, and lubrication method is grease lubrication.

[0067] Specifically, the radial force refers to the force whose direction passes through the center of the cross-section of the object, the axial force refers to the force acting on the object, its direction is parallel to the axis of the object and passes through the center of mass on the axis of the object, the journal diameter refers to the reference surface used for bearing installation and operation, the rotational speed refers to the number of circles that an object performing circular motion rotates around the center of the circle per unit time, the required life refers to the service life expected to be achieved by the product during the design, manufacturing or use process, the temperature coefficient refers to the rate at which the physical properties of the material change with temperature, and grease lubrication refers to the method of lubrication using grease as a lubricant.

[0068] See also Figure 2 As shown, it is a schematic diagram of the structure of the stator of this embodiment, and the stator includes:

[0069] A housing 201 connected to the stator core 202 and used to fix the stator core 202;

[0070] The stator core 202, whose outer end is connected to the housing 201 and whose inner end is connected to the insulating paper 203, is used to concentrate and enhance the rotating magnetic field;

[0071] Insulating paper 203, one end of which is connected to the stator core and the other end of which is connected to the winding 204, for increasing the insulation distance between the winding 204 and the stator core 202;

[0072] The winding 204 is connected to the insulating paper 203 and is used to generate a rotating magnetic field and drive the rotor 3 to rotate.

[0073] Specifically, in the stator core, the stator core structure is set to be a slotless structure, the material is 20WTG1500 electrical cold-rolled silicon steel sheet, and is bonded to the casing using two-component epoxy adhesive DG-2.

[0074] Specifically, in the insulating paper, the insulating paper material is set to be a 6650 composite material with a thickness of 0.15 mm.

[0075] Specifically, in the winding, the winding material is set to be hot air self-adhesive wire with a temperature resistance level of 220°C, the winding and both ends of the stator core are sealed with epoxy glue, and the casing material is 316 stainless steel.

[0076] Specifically, the slotless structure refers to the removal of the traditional tooth groove structure, the 20WTG1500 cold-rolled silicon steel sheet for electrical use refers to a ferrosilicon alloy containing 0.8%-4.8% silicon, which is a soft magnetic alloy material formed by cold rolling, the two-component epoxy adhesive DG-2 refers to a thermosetting resin glue composed of an epoxy resin component and a hardener component, and has a temperature resistance of 200°C, the 6650 composite material refers to a material composed of two layers of polyaramid fiber paper with a polyimide film sandwiched in between and compounded with an adhesive, the hot air self-adhesive wire with a temperature resistance grade of 220°C refers to a high-performance structural adhesive made of polyimide and other thermoplastic resins, the epoxy adhesive refers to an engineering adhesive prepared from an epoxy resin base material, a curing agent, a diluent, a accelerator and a filler, and the stainless round steel 2Cr13 refers to a stainless steel material with a martensitic structure.

[0077] See also Figure 3 As shown, it is a schematic diagram of the structure of the rotor of this embodiment, and the rotor includes:

[0078] The bearing 301 is connected to the magnetic steel 303, the outer balance ring 304 and the sensor magnetic steel 305 one by one, and is used to support the rotation of the magnetic steel 303, the outer balance ring 304 and the sensor magnetic steel 305;

[0079] An inner balance ring 302, which is connected to the bearing 301 and the magnetic steel 303, is used to reduce the vibration and imbalance of the rotor when it rotates at high speed;

[0080] The magnetic steel 303 is connected with the bearing 301, the inner balance ring 302 and the outer balance ring 304 to convert the electrical energy into mechanical energy and output the mechanical energy;

[0081] An outer balancing ring 304, which is connected to the bearing 301, the magnet 303 and the sensor magnet 305, is used to reduce the vibration and imbalance of the rotor when it rotates at high speed;

[0082] The sensor magnet 305 is mounted on the outer balance ring 304 and is used to detect the working parameters of the high temperature resistant DC hollow cup permanent magnet DC brushless slotless motor.

[0083] Specifically, in the rotor, the magnetic steel material is set to N45AH sintered NdFeB magnetic steel (temperature resistant to 230°C), the length is 28mm, the inner balance ring and the outer balance ring are made of brass H62, and the bearing material is stainless round steel 2Cr13.

[0084] Specifically, the N45AH sintered NdFeB magnet refers to a magnet material with extremely strong magnetism and the ability to maintain stable performance in a high temperature environment, and the brass H62 refers to brass with an average copper content of 62%.

[0085] See also Figure 4 As shown, it is a schematic diagram of the structure of the Hall plate assembly of this embodiment, and the Hall plate assembly includes:

[0086] A wire passing ring 401 connected to a Hall sensor 402 and used to protect the winding 204 passing through the housing 201;

[0087] The Hall sensor 402 is connected to the wire ring 401 and the circuit board 403 to detect the speed, position and magnetic field change of the high temperature resistant DC hollow cup permanent magnet DC brushless slotless motor.

[0088] A circuit board 403, which is connected to the Hall sensor 402 and the lead wire 404, and is used to process the electrical signal generated by the Hall sensor 402 and output the processed electrical signal;

[0089] The lead wire 404 is connected to the circuit board 403 and is used to transmit the processed electrical signal to the permanent magnet DC brushless slotless motor control system (not shown in the figure).

[0090] Specifically, in the Hall plate assembly, the temperature resistance of the Hall plate is 200°C, the Hall sensor is installed on the circuit board, and the lead wires are connected to the circuit board by soldering and spot welding. The wire ring material is set to be PEEK, a high-temperature resistant material with a temperature resistance grade of 250°C, the Hall sensor material is a Hall switch of model HAL732, the copper foil width in the Hall circuit is 0.3mm, the current density is 2.38A / mm2, the copper foil thickness in the circuit board is 6 ounces, the winding is a wire-petal hollow cup winding, the circuit copper foil width is 0.6mm, and the current density is 15.87A / mm2.

[0091] Specifically, soldering refers to a welding method that uses low-melting-point metal solder to heat and melt, then penetrate and fill the gap at the connection of metal parts; spot welding refers to a welding method that uses a columnar electrode to form a solder joint between the contact surfaces of two overlapping workpieces; the high-temperature resistant material PEEK with a temperature resistance grade of 250°C refers to polyetheretherketone special fiber and resin material; the Hall switch model HAL732 refers to a sensor with bipolar latch characteristics based on the Hall effect principle; the HAL732 refers to a domestic Hall sensor model; the Hall circuit refers to a Hall digital circuit composed of a voltage regulator, a Hall plate, a differential amplifier, a Schmitt trigger and an output stage; the copper foil refers to a cathodic electrolytic material deposited on the base layer of the circuit board as a conductor; the current density refers to the current intensity on the electrode per unit area; the ounce refers to a weight unit used to measure precious metals such as gold and silver; and the motor control system refers to a system that precisely controls the motor through electrical and electronic means.

[0092] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A high temperature resistant DC hollow cup permanent magnet DC brushless slotless motor, characterized in that: include: A front cover assembly connected to the stator and the rotor, used to protect the high-temperature DC coreless permanent magnet DC brushless slotless motor and prevent impurities from entering the high-temperature DC coreless permanent magnet DC brushless slotless motor; The stator is connected to the front cover assembly, the rear cover assembly, the rotor and the Hall plate assembly, and is used to generate a rotating magnetic field and drive the rotor to rotate; A rotor, which is connected to the front cover assembly, the stator, the Hall plate assembly and the rear cover assembly one by one, and is used to convert electrical energy into mechanical energy and output the mechanical energy; The wire ring is connected to the stator, the Hall plate assembly, and the cross-slot pan head screw to support the components and stabilize the internal structure; A Hall plate assembly connected to the stator and the back cover assembly for detecting the position of the rotor and providing a control signal to the motor controller; Cross recessed pan head screws, which are connected to the stator, the wire ring, and the rear cover assembly to support the internal structure; Cross recessed pan head screws, which are connected to the stator and Hall plate assembly and are used to support the internal structure; The rear cover assembly is connected to the stator and the rotor, and is used to protect the high-temperature DC hollow cup permanent magnet DC brushless slotless motor and prevent impurities from entering the high-temperature DC hollow cup permanent magnet DC brushless slotless motor.

2. The high temperature resistant DC coreless permanent magnet brushless DC slotless motor according to claim 1, characterized in that: In the high temperature DC coreless permanent magnet DC brushless slotless motor, the working process includes: Step G1, the position detector detects the magnetic pole signal of the rotor and transmits the magnetic pole signal to the controller; Step G2, the controller performs logic processing on the magnetic pole signal to obtain a switch signal; Step G3, the switch signal triggers the power switch devices in the inverter in a preset order; Step G4: The power switch device in the inverter distributes the power supply to each phase winding of the motor according to a preset logical relationship, so that the motor rotates and generates continuous torque.

3. The high temperature resistant DC coreless permanent magnet brushless DC slotless motor according to claim 1, characterized in that: Deep groove ball bearings are provided in the front cover assembly and the rear cover assembly, and the design parameters of the deep groove ball bearings are set as follows: radial force Fr=15 (N), axial force Fa=2 (N), journal diameter d1=4 (mm), rotation speed n=9000 (r / min), required life Lh'=50000 (h), temperature coefficient ft=1, and lubrication method is grease lubrication.

4. The high temperature resistant DC coreless permanent magnet brushless DC slotless motor according to claim 1, characterized in that: The stator comprises: A casing connected to the stator core and used to fix the stator core; The stator core, whose outer end is connected to the casing and whose inner end is connected to the insulating paper, is used to concentrate and enhance the rotating magnetic field; Insulating paper, one end of which is connected to the stator core and the other end is connected to the winding, and is used to increase the insulation distance between the winding and the stator core; The winding, which is connected to the insulating paper, is used to generate a rotating magnetic field and drive the rotor to rotate.

5. The high temperature resistant DC coreless permanent magnet brushless DC slotless motor according to claim 4, characterized in that: In the stator core, the stator core structure is set to be a slotless structure, the material is 20WTG1500 electrical cold-rolled silicon steel sheet, and is bonded to the casing using a two-component epoxy adhesive.

6. The high temperature resistant DC coreless permanent magnet brushless DC slotless motor according to claim 4, characterized in that: In the insulating paper, the insulating paper material is set to be a 6650 composite material with a thickness of 0.15 mm; In the winding, the winding material is set to be hot air self-adhesive wire with a temperature resistance level of 220°C, the winding and both ends of the stator core are sealed with epoxy glue, and the casing material is 316 stainless steel.

7. The high temperature resistant DC coreless permanent magnet brushless DC slotless motor according to claim 1, characterized in that: The rotor comprises: A bearing, which is connected to the magnetic steel, the outer balance ring and the sensor magnetic steel one by one, and is used to support the rotation of the magnetic steel, the outer balance ring and the sensor magnetic steel; The inner balance ring is connected to the bearing and the magnet to reduce the vibration and imbalance of the rotor when it rotates at high speed; A magnetic steel connected with the bearing, the inner balance ring and the outer balance ring to convert electrical energy into mechanical energy and output the mechanical energy; An outer balancing ring, which is connected to the bearing, the magnet and the sensor magnet to reduce the vibration and imbalance of the rotor when it rotates at high speed; The sensor magnet is installed on the outer balance ring and is used to detect the working parameters of the high temperature resistant DC hollow cup permanent magnet DC brushless slotless motor.

8. The high temperature resistant DC coreless permanent magnet brushless DC slotless motor according to claim 7, characterized in that: In the rotor, the magnetic steel material is set to N45AH sintered NdFeB magnetic steel, the length is 28 mm, the inner balance ring and the outer balance ring are made of brass H62, and the bearing material is stainless round steel 2Cr13.

9. The high temperature resistant DC coreless permanent magnet brushless DC slotless motor according to claim 1, characterized in that: The Hall plate assembly comprises: A wire passing ring, which is connected to the Hall sensor and is used to protect the winding passing through the housing; The Hall sensor is connected to the wire ring and the circuit board and is used to detect the speed, position and magnetic field change of the high temperature resistant DC hollow cup permanent magnet DC brushless slotless motor; A circuit board, which is connected to the Hall sensor and the lead wire, and is used to process the electrical signal generated by the Hall sensor and output the processed electrical signal; The lead wire is connected to the circuit board and is used to transmit the processed electrical signal to the permanent magnet DC brushless slotless motor control system.

10. The high temperature resistant DC coreless permanent magnet brushless DC slotless motor according to claim 1, characterized in that: In the Hall plate assembly, the temperature resistance of the Hall plate is 200°C, the Hall sensor is installed on the circuit board, and the lead wire is connected to the circuit board by soldering and spot welding. The wire ring material is polyetheretherketone with a temperature resistance grade of 250°C, the Hall sensor material is a Hall switch, the copper foil width in the Hall circuit is 0.3mm, and the current density is 2.38A / mm 2 The copper foil thickness of the circuit board is 6 ounces, the winding is a line-petal hollow cup winding, the circuit copper foil width is 0.6mm, and the current density is 15.87A / mm 2 .

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