A high-efficiency permanent magnet synchronous motor

Abstract

The invention discloses a high-efficiency permanent magnet synchronous motor, comprising: a permanent magnet synchronous motor housing, a heat exchange and air release mechanism and a spray heat dissipation mechanism; a transmission support shaft is installed on the permanent magnet synchronous motor housing, and a heat dissipation fan is installed at one end of the transmission support shaft arranged in the permanent magnet synchronous motor housing; the heat exchange and air release mechanism comprises a fixed storage box, a storage cavity is excavated in the fixed storage box, a heat exchange vertical plate is installed on the side wall of the storage cavity, and a plurality of jet delivery pipes are fixedly connected above the fixed storage box; the spray heat dissipation mechanism comprises a sealing cover, a heat exchange air duct is arranged between the sealing cover and the permanent magnet synchronous motor housing, and a plurality of evenly distributed downward inclined pipes are installed on the heat exchange air duct. The invention improves the heat dissipation effect of the motor by setting the corresponding mechanism of the permanent magnet synchronous motor, so that the internal temperature of the equipment will not be too high after long-term use, thereby reducing the probability of damage to internal components, avoiding safety accidents, and ensuring the personal safety of users.

Description

Technical Field

[0001] The invention belongs to the technical field of motor heat dissipation, and in particular relates to a high-efficiency permanent magnet synchronous motor. Background Art

[0002] The permanent magnet synchronous motor is mainly composed of various parts such as the rotor, end cover and stator. The stator structure of the permanent magnet synchronous motor is very similar to that of the ordinary induction motor. The biggest difference between the rotor structure and the asynchronous motor is that high-quality permanent magnet poles are placed on the rotor. According to the different positions of the permanent magnets on the rotor, the permanent magnet synchronous motor is usually divided into a surface rotor structure and an internal rotor structure. The permanent magnet synchronous motor has the characteristics of high torque density, high efficiency and good reliability, and has been widely used in new energy electric vehicle drive systems.

[0003] At present, pure electric vehicles generally use permanent magnet synchronous motors, which achieves the purpose of saving materials and reducing volume. However, after long-term use, permanent magnet synchronous motors will generate a lot of heat inside. However, due to the small size of permanent magnet synchronous motors, the heat dissipation area of ​​the motor is relatively insufficient. Excessive temperature will not only affect the working performance of the motor, but may even cause serious damage to the motor. Even if the motor is always in a high temperature state, it is easy to burn important internal components, thereby causing safety accidents and endangering the personal safety of users.

[0004] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention and should not be regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the invention

[0005] The object of the present invention is to provide a high-efficiency permanent magnet synchronous motor, which can solve the problem of poor heat dissipation effect of permanent magnet synchronous motors in the prior art.

[0006] In order to achieve the above object, a technical solution provided by a specific embodiment of the present invention is as follows:

[0007] A high-efficiency permanent magnet synchronous motor, comprising: a permanent magnet synchronous motor housing, a heat exchange and air release mechanism, and a spray heat dissipation mechanism;

[0008] A transmission support shaft is installed on the permanent magnet synchronous motor housing, and a cooling fan is installed on one end of the transmission support shaft arranged in the permanent magnet synchronous motor housing;

[0009] The heat exchange and air release mechanism is installed on one side of the permanent magnet synchronous motor housing, and the heat exchange and air release mechanism includes a fixed storage box, a storage cavity is drilled in the fixed storage box, and the storage cavity is filled with liquid nitrogen. An air suction channel is also drilled on the fixed storage box, and a heat exchange vertical plate is installed on the side wall of the storage cavity. A plurality of jet delivery pipes are fixedly connected to the top of the fixed storage box, and the plurality of jet delivery pipes are all connected to the storage cavity.

[0010] The spray heat dissipation mechanism is installed on the permanent magnet synchronous motor housing, and the spray heat dissipation mechanism includes a sealing cover. A heat exchange air duct is arranged between the sealing cover and the permanent magnet synchronous motor housing. The heat exchange air duct is fixed on the permanent magnet synchronous motor housing. The heat exchange air duct is arranged in a concave arc on a side away from the permanent magnet synchronous motor housing, and a plurality of evenly distributed downstream inclined pipes are installed on the heat exchange air duct.

[0011] In one or more embodiments of the present invention, the portion of the transmission support shaft disposed within the permanent magnet synchronous motor housing is also equipped with a motor rotor, on which a permanent magnet is embedded, and a motor stator is installed on the outer side of the motor rotor, on which a stator winding is wound, so that the device can rotate after the power is turned on, thereby achieving the effect of driving other equipment to rotate and acting as a power source.

[0012] In one or more embodiments of the present invention, a fixed frame is fixed on both sides of the motor rotor, which is used to engage and fix the transmission support shaft to ensure the stability of the transmission support shaft and prevent the transmission support shaft from falling off, so that the transmission support shaft can stably support the cooling fan and drive the cooling fan to rotate. A plurality of air holes are drilled on the fixed frame for the passage of gas, so that the cooling fan can make the gas float to one side when rotating, thereby facilitating the subsequent flow of gas, so that the gas can quickly discharge the heat generated in the permanent magnet synchronous motor housing, so as to achieve heat dissipation in the permanent magnet synchronous motor housing;

[0013] A pair of fixed frames and the transmission support shaft are fixedly connected with fixed bearings for fixing the transmission support shaft to ensure that the transmission support shaft will not shake or tilt, thereby being able to stably drive other equipment to rotate and ensuring that the rotation of the transmission support shaft will not be affected, thereby improving the stability of the device.

[0014] In one or more embodiments of the present invention, a plurality of air intake holes and heat dissipation holes are respectively opened at both ends of the permanent magnet synchronous motor casing. The air intake holes are used to ensure that the cooling fan can suck the air intake channel into the permanent magnet synchronous motor casing after rotation, thereby facilitating the heat dissipation and cooling of the permanent magnet synchronous motor casing. The heat dissipation holes are used to quickly dissipate the heat generated in the permanent magnet synchronous motor casing, so that the permanent magnet synchronous motor casing will not continue to have a high temperature, thereby ensuring the stable operation of the equipment and reducing the probability of equipment damage.

[0015] In one or more embodiments of the present invention, a plurality of dustproof nets are fixed on the fixed storage box for filtering the gas sucked into the casing of the permanent magnet synchronous motor to avoid bringing dust into the casing of the permanent magnet synchronous motor during the process of sucking gas, thereby preventing the equipment components in the casing of the permanent magnet synchronous motor from being affected by the dust, thereby reducing the probability of damage to the device.

[0016] In one or more embodiments of the present invention, a pressure relief protection valve is provided in one end of the plurality of jet delivery pipes away from the fixed storage tank, for spraying out nitrogen gas vaporized from liquid nitrogen, and since the pressure relief protection valve will open only when the pressure exceeds its set value, gas will not be continuously sprayed out, thereby effectively reducing resource consumption, and enabling the device to spray intermittently, thereby intermittently dissipating heat and cooling the components in the permanent magnet synchronous motor casing, which not only protects the equipment but also reduces resource consumption.

[0017] In one or more embodiments of the present invention, a spray dispersion frame is fixed on the sealing cover, which is used to disperse the spray water delivered by the water delivery pipe and spray it from multiple spray holes, so that the spray water flows downward from multiple downstream inclined tubes evenly, increasing the contact area between the spray water and the outer wall of the permanent magnet synchronous motor housing, thereby improving the heat dissipation effect of the permanent magnet synchronous motor housing, avoiding excessive temperature in the permanent magnet synchronous motor housing, and reducing the probability of device damage. The spray dispersion frame is arranged directly above the heat exchange air duct, so that the spray water flowing downward from the spray hole can flow to the concave part at the top of the heat exchange air duct, and then can flow downward from multiple downstream inclined tubes, so as to improve the heat dissipation effect of the device;

[0018] The lower end of the spray dispersion frame is provided with a plurality of evenly distributed spray holes for allowing the spray water to flow to the heat exchange air duct, so that the water flow can flow downward from a plurality of downstream inclined tubes, increasing the contact area between the spray water and the permanent magnet synchronous motor casing, so as to improve the heat dissipation effect.

[0019] In one or more embodiments of the present invention, a dispersion support frame is fixed on the top of the permanent magnet synchronous motor housing, which is used to disperse the gas transported by the connecting pipe and spray it out from multiple jet holes, thereby improving the heat dissipation effect. The end of the heat exchange air duct away from the jet delivery pipe is fixedly connected to a connecting pipe, which is used to connect the heat exchange air duct with the dispersion support frame, so that the gas generated by the gasification of liquid nitrogen enters the dispersion support frame. The dispersion support frame is drilled with multiple jet holes, which are used to evenly spray the gas, thereby improving the heat dissipation effect inside the permanent magnet synchronous motor housing.

[0020] In one or more embodiments of the present invention, a storage water tank is installed at the bottom of the sealing cover for storing spray water, thereby avoiding waste of resources and allowing the spray water to be recycled. A filter net is fixed in the storage water tank for filtering the spray water, thereby avoiding blockage of the water suction pipe and the water delivery pipe and ensuring the fluidity of the spray water.

[0021] In one or more embodiments of the present invention, water pumps are provided on both sides of the storage water tank for driving the flow of spray water. A water suction pipe and a water delivery pipe are fixedly connected to the water pump, both of which are used to deliver spray water so that the spray water can circulate, thereby achieving heat dissipation treatment of the permanent magnet synchronous motor casing. The other end of the water suction pipe is inserted into the storage water tank, and the other end of the water delivery pipe is connected to the spray dispersion frame. A supporting thin rod is fixedly connected between the water pump and the sealing cover for fixing the water pump to prevent the water pump from shaking or falling off.

[0022] Compared with the prior art, the present invention improves the heat dissipation effect of the motor by setting the corresponding mechanism of the permanent magnet synchronous motor, so that the internal temperature of the equipment will not be too high after long-term use, thereby reducing the probability of damage to internal components, avoiding safety accidents, and ensuring the personal safety of users. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 A cross-sectional view of a high-efficiency permanent magnet synchronous motor according to an embodiment of the present invention;

[0025] Figure 2 for Figure 1 The schematic diagram of the structure shown at A in the middle;

[0026] Figure 3 for Figure 1The schematic diagram of the structure shown at B in the figure;

[0027] Figure 4 for Figure 1 The schematic diagram of the structure shown at C in the middle;

[0028] Figure 5 A three-dimensional diagram of a high-efficiency permanent magnet synchronous motor in one embodiment of the present invention;

[0029] Figure 6 is a cross-sectional view of a fixed storage box in one embodiment of the present invention;

[0030] Figure 7 A cross-sectional view of an air jet delivery pipe in one embodiment of the present invention;

[0031] Figure 8 It is a partial structural cross-sectional view of a high-efficiency permanent magnet synchronous motor in one embodiment of the present invention;

[0032] Fig. 9 for Figure 8 The schematic diagram of the structure shown at D in the figure;

[0033] Fig.10 Schematic diagram of the structure of the heat exchange air duct in one embodiment of the present invention.

[0034] Description of main reference numerals:

[0035] 1-permanent magnet synchronous motor housing, 101-transmission support shaft, 102-cooling fan, 103-motor rotor, 104-permanent magnet, 105-motor stator, 106-stator winding, 107-fixed frame, 108-ventilation holes, 109-fixed bearing, 110-intake holes, 111-heat dissipation holes, 2-heat exchange and degassing mechanism, 201-fixed storage box, 202-storage chamber, 203-intake channel, 204-heat exchange vertical plate, 205-jet delivery pipe, 206-dustproof net, 207-pressure relief protection valve, 3-spray heat dissipation mechanism, 301-sealing cover, 302-heat exchange air duct, 303-downstream inclined pipe, 304-spray dispersion frame, 305-spray hole, 306-connecting pipe, 307-dispersion support frame, 308-jet hole, 309-water storage tank, 310-filter net, 311-water pump, 312-water suction pipe, 313-water delivery pipe, 314-support thin rod. DETAILED DESCRIPTION

[0036] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings 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 should fall within the scope of protection of the present invention.

[0037] like Figure 1-Figure 10 As shown, a high-efficiency permanent magnet synchronous motor in an embodiment of the present invention includes: a permanent magnet synchronous motor housing 1, a heat exchange and air release mechanism 2 and a spray heat dissipation mechanism 3.

[0038] like Figure 1 As shown, a transmission support shaft 101 is installed on the permanent magnet synchronous motor housing 1, which is used to drive the rotation of other equipment, and has the function of supporting and driving the cooling fan 102 to rotate. The cooling fan 102 is installed at one end of the transmission support shaft 101 disposed in the permanent magnet synchronous motor housing 1, which is used to drive the gas flow, so that the gas can quickly take away the heat generated in the permanent magnet synchronous motor housing 1, thereby improving the heat dissipation effect.

[0039] like Figure 1 As shown, the part of the transmission support shaft 101 disposed in the permanent magnet synchronous motor housing 1 is also equipped with a motor rotor 103, on which a permanent magnet 104 is embedded, and a motor stator 105 is installed on the outer side of the motor rotor 103, on which a stator winding 106 is wound, so that the device can rotate after the power is turned on, thereby achieving the effect of driving other equipment to rotate and playing the role of a power source.

[0040] like Figure 1-Figure 4 As shown, a fixed frame 107 is fixed on both sides of the motor rotor 103, which is used to engage and fix the transmission support shaft 101, ensure the stability of the transmission support shaft 101, and prevent the transmission support shaft 101 from falling off, so that the transmission support shaft 101 can stably support the cooling fan 102 and drive the cooling fan 102 to rotate. A plurality of air holes 108 are drilled on the fixed frame 107 for the passage of gas, so that the cooling fan 102 can make the gas float to one side when rotating, thereby facilitating the subsequent flow of gas, so that the gas can quickly discharge the heat generated in the permanent magnet synchronous motor housing 1, so as to achieve heat dissipation in the permanent magnet synchronous motor housing 1.

[0041] Among them, a fixed bearing 109 is fixedly connected between a pair of fixed frames 107 and the transmission support shaft 101, which is used to fix the transmission support shaft 101 to ensure that the transmission support shaft 101 will not shake or tilt, so that it can stably drive other equipment to rotate and the rotation of the transmission support shaft 101 will not be affected, thereby improving the stability of the device.

[0042] like Figure 1 As shown, a plurality of air intake holes 110 and heat dissipation holes 111 are respectively opened at both ends of the permanent magnet synchronous motor housing 1. The air intake holes 110 are used to ensure that the cooling fan 102 can suck the air intake channel 203 into the permanent magnet synchronous motor housing 1 after rotation, so as to facilitate heat dissipation and cooling of the permanent magnet synchronous motor housing 1. The heat dissipation holes 111 are used to quickly dissipate the heat generated in the permanent magnet synchronous motor housing 1, so that the permanent magnet synchronous motor housing 1 will not continue to be high temperature, thereby ensuring the stable operation of the equipment and reducing the probability of equipment damage.

[0043] like Figure 1-Figure 6 As shown, the heat exchange and venting mechanism 2 is installed on one side of the permanent magnet synchronous motor housing 1, and the heat exchange and venting mechanism 2 includes a fixed storage box 201, and a storage cavity 202 is drilled in the fixed storage box 201 for storing liquid nitrogen, so as to facilitate the use of liquid nitrogen to quickly cool down the permanent magnet synchronous motor housing 1 and avoid the temperature in the permanent magnet synchronous motor housing 1 being too high, so as not to affect the operation and use of the device. The storage cavity 202 is filled with liquid nitrogen, and an air intake channel 203 is also drilled on the fixed storage box 201 for gas transportation, so that the gas can enter the permanent magnet synchronous motor housing 1, and will contact the heat exchange vertical plate 204 during the flow process, thereby facilitating heat exchange processing.

[0044] like Figure 1-Figure 6 As shown, a heat exchange vertical plate 204 is installed on the side wall of the storage chamber 202. The heat exchange vertical plate 204 has good thermal conductivity, so that the temperature of the flowing gas is reduced through heat exchange, and then the heat dissipation and cooling effect is achieved after the gas enters the permanent magnet synchronous motor housing 1. A plurality of jet delivery pipes 205 are fixedly connected to the top of the fixed storage box 201, and the plurality of jet delivery pipes 205 are connected to the storage chamber 202, so that the gas generated by the gasification of liquid nitrogen can be passed from the jet delivery pipe 205 into the heat exchange gas channel 302, and then can be transported to the permanent magnet synchronous motor housing 1, thereby improving the heat dissipation and cooling effect in the permanent magnet synchronous motor housing 1.

[0045] Among them, multiple dustproof nets 206 are fixed on the fixed storage box 201, which are used to filter the gas sucked into the permanent magnet synchronous motor casing 1 to avoid bringing dust into the permanent magnet synchronous motor casing 1 during the process of sucking gas, so that the equipment components in the permanent magnet synchronous motor casing 1 will not be affected by dust, reducing the probability of device damage.

[0046] Specifically, a pressure relief protection valve 207 is provided in one end of the plurality of jet delivery pipes 205 away from the fixed storage box 201, for spraying out nitrogen gas vaporized from liquid nitrogen. Since the pressure relief protection valve 207 will only open when the pressure exceeds its set value, the gas will not be continuously sprayed out, thereby effectively reducing the consumption of resources. Moreover, the device can be sprayed intermittently, thereby intermittently dissipating heat and cooling the components in the permanent magnet synchronous motor housing 1, which not only protects the equipment but also reduces the consumption of resources.

[0047] like Figure 1-Figure 9 As shown, the spray heat dissipation mechanism 3 is installed on the permanent magnet synchronous motor housing 1. The spray heat dissipation mechanism 3 includes a sealing cover 301, which is used to support the spray dispersion frame 304 to prevent the spray dispersion frame 304 from falling, and also has a leakage-proof function, so that the spray water will not be reduced, and can be recycled to reduce the waste of resources. A heat exchange air duct 302 is arranged between the sealing cover 301 and the permanent magnet synchronous motor housing 1. The heat exchange air duct 302 is made of silicon carbide. The heat exchange air duct 302 is fixed on the permanent magnet synchronous motor housing 1 and is used for the flow of gas ejected by the pressure relief protection valve 207. Since the heat exchange air duct 302 has good thermal conductivity, the spray water flowing through it is effectively cooled, so as to achieve the heat dissipation and cooling effect on the permanent magnet synchronous motor housing 1.

[0048] Specifically, the heat exchange air duct 302 is set in a concave arc on one side away from the permanent magnet synchronous motor housing 1, so that the spray water flows downward through the downstream inclined pipe 303, thereby increasing the contact area between the spray water and the permanent magnet synchronous motor housing 1 and improving the heat dissipation effect. A plurality of evenly distributed downstream inclined pipes 303 are installed on the heat exchange air duct 302 for the spray water to flow downward.

[0049] like Figure 1-Figure 10 As shown, a spray dispersion frame 304 is fixed on the sealing cover 301, which is used to disperse the spray water delivered by the water delivery pipe 313 and spray it from multiple spray holes 305, so that the spray water flows downward from multiple downstream inclined pipes 303 evenly, increasing the contact area between the spray water and the outer wall of the permanent magnet synchronous motor housing 1, thereby improving the heat dissipation effect of the permanent magnet synchronous motor housing 1, avoiding excessive temperature inside the permanent magnet synchronous motor housing 1, and reducing the probability of device damage. The spray dispersion frame 304 is arranged directly above the heat exchange air duct 302, so that the spray water flowing downward from the spray hole 305 can flow to the concave part at the top of the heat exchange air duct 302, and then can flow downward from multiple downstream inclined pipes 303, so as to improve the heat dissipation effect of the device.

[0050] Among them, a plurality of evenly distributed spray holes 305 are drilled at the lower end of the spray dispersion frame 304, which are used to allow the spray water to flow to the heat exchange air duct 302, so that the water flow can flow downward from the plurality of downstream inclined tubes 303, increasing the contact area between the spray water and the permanent magnet synchronous motor housing 1, so as to improve the heat dissipation effect.

[0051] like Figure 1-Figure 3 As shown, a dispersion support frame 307 is fixed on the top of the permanent magnet synchronous motor housing 1, which is used to disperse the gas delivered by the connecting pipe 306 and spray it from multiple jet holes 308, thereby improving the heat dissipation effect. A connecting pipe 306 is fixedly connected to one end of the heat exchange gas duct 302 away from the jet delivery pipe 205, which is used to connect the heat exchange gas duct 302 with the dispersion support frame 307, so that the gas generated by the gasification of liquid nitrogen enters the dispersion support frame 307. Multiple jet holes 308 are drilled on the dispersion support frame 307, which are used to uniformly spray the gas, thereby improving the heat dissipation effect in the permanent magnet synchronous motor housing 1.

[0052] like Figure 1-Figure 8 As shown, a water storage tank 309 is installed at the bottom of the sealing cover 301 for storing spray water, thereby avoiding waste of resources and allowing the spray water to be recycled. A filter 310 is fixed in the water storage tank 309 for filtering the spray water, thereby avoiding blockage of the water suction pipe 312 and the water delivery pipe 313 and ensuring the fluidity of the spray water.

[0053] Specifically, water pumps 311 are provided on both sides of the storage water tank 309 for driving the flow of spray water, and a water suction pipe 312 and a water delivery pipe 313 are fixedly connected to the water pump 311, both of which are used to deliver spray water so that the spray water can circulate and flow, thereby achieving heat dissipation treatment of the permanent magnet synchronous motor housing 1. The other end of the water suction pipe 312 is inserted into the storage water tank 309, and the other end of the water delivery pipe 313 is connected to the spray dispersion frame 304. A thin support rod 314 is fixedly connected between the water pump 311 and the sealing cover 301 for fixing the water pump 311 to prevent the water pump 311 from shaking or falling off.

[0054] When the device is in use, the transmission support shaft 101 is used to drive the cooling fan 102 to rotate, and the cooling fan 102 blows the gas toward the motor rotor 103 after rotation, and then the gas is discharged outward from the heat dissipation holes 111, and the external gas enters the permanent magnet synchronous motor housing 1 through the air intake channel 203 and the air intake hole 110, and the gas is filtered by the dustproof net 206 before entering the air intake channel 203, so that impurities and dust are not easy to enter the permanent magnet synchronous motor housing 1, thereby ensuring the stable operation of the device;

[0055] When the gas flows in the air intake channel 203, it will contact the heat exchange vertical plate 204, and the heat exchange vertical plate 204 has a good heat conduction effect, so that the temperature of the gas flowing through it drops rapidly, and then the gas blown into the permanent magnet synchronous motor housing 1 can dissipate heat and cool down the components in the permanent magnet synchronous motor housing 1, thereby improving the heat dissipation effect of the equipment;

[0056] As the heat exchange of the heat exchange vertical plate 204 continues, the liquid nitrogen in the storage chamber 202 can be gasified, and the air pressure in the fixed storage box 201 gradually increases. When the pressure increases to the set value of the pressure relief protection valve 207, gas will be ejected outward from the pressure relief protection valve 207 to relieve the pressure in the storage chamber 202. As the gas is ejected, the pressure in the storage chamber 202 decreases, and the pressure relief protection valve 207 is closed again to achieve the effect of intermittent jet injection. The gasified nitrogen will enter the heat exchange air duct 302, and then be transported to the dispersed support frame 307 through the connecting pipe 306, and finally be ejected through the multiple jet holes 308. The temperature of the ejected nitrogen will also be relatively low, so it also plays a role in heat dissipation and cooling of the equipment. In addition, since the gas is obtained by gasification of liquid nitrogen, it will not be doped with impurities and will not affect the components in the permanent magnet synchronous motor housing 1.

[0057] The start of the water pump 311 will extract the liquid in the storage water tank 309, and then transport it to the spray dispersion frame 304 through the delivery water pipe 313, and then flow downward from the multiple spray holes 305 to the heat exchange air duct 302, and then flow downward from the downstream inclined pipe 303. However, since the temperature of the gas transported in the heat exchange air duct 302 is relatively low, the liquid flowing into the heat exchange air duct 302 and the downstream inclined pipe 303 will exchange heat, so that the temperature of the liquid will drop, and then when it flows to the permanent magnet synchronous motor housing 1, the heat dissipation effect is better, and then through the multiple heat dissipation protection structures, the temperature inside the permanent magnet synchronous motor housing 1 will not be too high, and will not affect the use of the device.

[0058] 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.

[0059] 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 high-efficiency permanent magnet synchronous motor, characterized in that: include: A permanent magnet synchronous motor housing, wherein a transmission support shaft is installed on the permanent magnet synchronous motor housing, and a cooling fan is installed at one end of the transmission support shaft disposed in the permanent magnet synchronous motor housing; A heat exchange and air release mechanism is installed on one side of the permanent magnet synchronous motor housing, and the heat exchange and air release mechanism includes a fixed storage box, a storage cavity is drilled in the fixed storage box, and the storage cavity is filled with liquid nitrogen. An air suction channel is also drilled on the fixed storage box, and a heat exchange vertical plate is installed on the side wall of the storage cavity. A plurality of jet delivery pipes are fixedly connected to the top of the fixed storage box, and the plurality of jet delivery pipes are all connected to the storage cavity; A spray heat dissipation mechanism is installed on the permanent magnet synchronous motor housing, and the spray heat dissipation mechanism includes a sealing cover, a heat exchange air duct is arranged between the sealing cover and the permanent magnet synchronous motor housing, and the gas generated by the gasification of liquid nitrogen can be passed into the heat exchange air duct from the jet delivery pipe. The heat exchange air duct is fixed on the permanent magnet synchronous motor housing, and the heat exchange air duct is arranged in a concave arc on a side away from the permanent magnet synchronous motor housing. A plurality of evenly distributed downstream inclined pipes are installed on the heat exchange air duct, and a spray dispersion frame is fixed on the sealing cover, and the spray dispersion frame is arranged directly above the heat exchange air duct, and a plurality of evenly distributed spray holes are drilled at the lower end of the spray dispersion frame.

2. A high-efficiency permanent magnet synchronous motor according to claim 1, characterized in that: The portion of the transmission support shaft disposed in the permanent magnet synchronous motor housing is also equipped with a motor rotor, on which a permanent magnet is embedded, and a motor stator is installed on the outer side of the motor rotor, on which a stator winding is wound.

3. A high-efficiency permanent magnet synchronous motor according to claim 2, characterized in that: A fixed frame is fixed on both sides of the motor rotor, a plurality of air-permeable holes are drilled on the fixed frame, and a pair of fixed bearings are fixedly connected between the fixed frame and the transmission support shaft.

4. The high-efficiency permanent magnet synchronous motor according to claim 1, characterized in that: Both ends of the permanent magnet synchronous motor housing are respectively provided with a plurality of air intake holes and heat dissipation holes.

5. The high-efficiency permanent magnet synchronous motor according to claim 1, characterized in that: A plurality of dustproof nets are fixed on the fixed storage box.

6. The high-efficiency permanent magnet synchronous motor according to claim 1, characterized in that: A pressure relief protection valve is arranged in one end of a plurality of the jet delivery pipes away from the fixed storage tank.

7. The high-efficiency permanent magnet synchronous motor according to claim 1, characterized in that: A dispersion support frame is fixed on the top of the permanent magnet synchronous motor housing, a connecting pipe is fixedly connected to one end of the heat exchange air passage away from the jet delivery pipe, and a plurality of jet holes are drilled on the dispersion support frame.

8. The high-efficiency permanent magnet synchronous motor according to claim 1, characterized in that: A water storage tank is installed at the bottom of the sealing cover, and a filter screen is fixed in the water storage tank.

9. The high-efficiency permanent magnet synchronous motor according to claim 8, characterized in that: Water pumps are provided on both sides of the storage water tank, and a water suction pipe and a water delivery pipe are fixedly connected to the water pump. The other end of the water suction pipe is inserted into the storage water tank, and the other end of the water delivery pipe is connected to the spray dispersion frame. A supporting thin rod is fixedly connected between the water pump and the sealing cover.

Images