A three-phase AC variable frequency synchronous motor

Abstract

The present invention discloses a three-phase AC variable frequency synchronous motor, including a motor host and a motor controller; the motor host includes a housing, a front cover and a rear cover; a rotor assembly and a stator assembly are arranged inside the housing, and the rotor assembly and the stator assembly cooperate with each other; a transmission shaft is arranged on one side of the rotor assembly, the transmission shaft passes through the front cover and a synchronous pulley is installed on the outer end of the transmission shaft; a heat dissipation device is installed on the housing, and the motor controller is electrically connected to the heat dissipation device; a grounding terminal is installed on the housing, and the grounding terminal is connected to the grounding terminal through a connecting line; the motor host is installed on a height adjustment mechanism. The present invention has a simple structure and is easy to install. It uses water cooling to dissipate heat, thereby improving the cooling effect; and with the function of the control valve, it can achieve different cooling effects for different positions.

Description

Technical Field

[0001] The present invention relates to the field of motors, and in particular to a three-phase AC variable frequency synchronous motor. Background Art

[0002] The three-phase synchronous motor is a type of AC rotating motor, named because its speed is always equal to the three-phase synchronous speed. The three-phase synchronous motor is mainly used as a generator, but can also be used as a motor and a phase regulator. In the modern power industry, whether it is thermal power generation, hydropower generation, or nuclear power generation, almost all three-phase synchronous generators are used.

[0003] At present, three-phase AC variable frequency synchronous motors are generally air-cooled, using fans for ventilation and heat dissipation, but the heat dissipation effect is not good.

[0004] In addition, the motor can only be fixed during installation and there is no way to adjust the position, which causes inconvenience in actual use. Summary of the invention

[0005] In view of this, an object of the present invention is to provide a three-phase AC variable frequency synchronous motor to solve the defects existing in the prior art.

[0006] The present invention provides a three-phase AC variable frequency synchronous motor, comprising a motor host and a motor controller; the motor host comprises a shell, a front cover, and a rear cover; a rotor assembly and a stator assembly are arranged inside the shell, and the rotor assembly and the stator assembly cooperate with each other; a transmission shaft is arranged on one side of the rotor assembly, the transmission shaft passes through the front cover, and a synchronous pulley is installed on the outer end of the transmission shaft; a heat dissipation device is installed on the shell, and the motor controller is electrically connected to the heat dissipation device; a grounding terminal is installed on the shell, and the grounding terminal is connected to the grounding end through a connecting line; the motor host is installed on a height adjustment mechanism.

[0007] In one embodiment, the front end cover is provided with a front stator mounting hole, and the rear end cover is provided with a rear stator mounting hole; two ends of the stator assembly are respectively mounted on the front stator mounting hole and the rear stator mounting hole.

[0008] In one embodiment, the rotor assembly includes a rotor shaft, on which a magnetic steel core is wound; ball bearings are respectively provided at both ends of the rotor shaft, and the rotor shaft passes through the ball bearings and is installed on the front cover and the rear cover; a first aluminum end ring and a blind hole are installed on one side of the magnetic steel core, and a magnetic steel is installed in the blind hole; a second aluminum end ring is installed on the other side of the magnetic steel core; the width of the second aluminum end ring is greater than the straight-line distance between the outer edge of the first aluminum end ring and the inner edge of the blind hole.

[0009] In one embodiment, the stator assembly includes a stator core mounted on the inner wall of the housing and coils disposed at two ends of the stator core.

[0010] In one embodiment, the heat dissipation device includes a mounting frame arranged on the rear end cover, a cooling coil is wound around the outer shell, and the two ends of the cooling coil are respectively a water inlet end and a water outlet end; the water inlet end and the water are respectively connected to a water tank installed in the mounting frame; a radiator is installed on the water tank; the water tank is connected to an external container through an inlet and outlet water pipe.

[0011] In one embodiment, the radiator includes a base mounted on a mounting frame, a micro motor is mounted on the base, the micro motor is transmission-connected to a fan seat, and fan blades are mounted on the fan seat; through holes are designed through the base and the fan seat, and the inlet and outlet water pipes pass through the through holes.

[0012] In one embodiment, a plurality of temperature sensors are arranged around the shell, and the motor controller determines the motor operation status and adjusts the water inlet rate of the cooling coils at different positions according to the values ​​monitored by the temperature sensors, the rotation speed of the motor body and the working time.

[0013] In one embodiment, the height adjustment mechanism includes an adjustment base, on which a plurality of adjustment seats are installed; a lifting mechanism is installed on the adjustment seat; the upper end of the lifting mechanism is connected to a connecting seat; and the connecting seat is connected to the lower end of the shell.

[0014] In one embodiment, the lifting mechanism includes an adjustment cavity arranged in the adjustment seat, and a flat rotating disk is arranged in the adjustment cavity; an internal thread is arranged on the inner wall of the rotating disk; a threaded rod is slidably installed on the adjustment seat and the adjustment base; the threaded rod is threadedly connected in the rotating disk; and an adjustment window corresponding to the rotating disk is arranged on the adjustment seat.

[0015] In one embodiment, the connecting seat includes a lower arc seat located at the bottom and an upper square seat located at the top; a U-shaped seat is provided inside the lower arc seat, and connecting holes are provided on both sides of the U-shaped seat; the upper part of the threaded rod is connected to the U-shaped seat through a pin shaft and two connecting holes.

[0016] Due to the adoption of the above technology, the beneficial effects in this patent are:

[0017] 1. The present invention has a simple structure and is easy to install. It uses water cooling to dissipate heat, thereby improving the cooling effect. At the same time, with the help of a control valve, it can achieve different cooling effects at different locations.

[0018] 2. The present invention adopts an adjustable base for installation, which is convenient and practical, and the adjustable base can realize multi-angle adjustment and adjustment of different angles of the front and rear parts, which increases the convenience of using the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 It is a schematic cross-sectional structure diagram of the three-phase AC variable frequency synchronous motor of the present invention.

[0021] Figure 2 It is a schematic structural diagram of the grounding terminal of the present invention.

[0022] Figure 3 It is a structural schematic diagram of the stator assembly of the present invention.

[0023] Figure 4 It is a schematic diagram of the structure of the cooling coil of the present invention.

[0024] Figure 5 It is a schematic structural diagram of the heat dissipation device of the present invention.

[0025] Figure 6 It is a structural schematic diagram of the height adjustment mechanism of the present invention.

[0026] Figure 7 The figure is a schematic diagram of the structure of the height adjustment mechanism of the present invention with a motor added. DETAILED DESCRIPTION

[0027] The following will be combined with the attached Figure 1-7 , a specific embodiment of the present invention is described in detail. Obviously, the described embodiment is only a part of the embodiments of the present invention, not all of the embodiments. Based on the description 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.

[0028] In the description of the present invention, unless otherwise clearly specified and limited, the terms "set", "install", "connection" and the like 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 an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0029] The directions or positional relationships indicated by terms such as “upper”, “lower”, “left”, “right”, “front”, “back”, “top”, “bottom”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the inventive product is usually placed when used. They are only for the convenience of description and simplified description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0030] The terms "first", "second", "third" and the like are merely used to distinguish elements of similar nature, and do not indicate or imply relative importance or a particular order.

[0031] The terms "comprises," "comprising," or any other variations thereof, are intended to cover a non-exclusive inclusion of the elements listed and may also include additional elements not expressly listed.

[0032] Example 1

[0033] like Figure 1-3 As shown, a three-phase AC variable frequency synchronous motor includes a motor host and a motor controller.

[0034] The motor host includes a housing, a front cover 9, and a rear cover 8. A rotor assembly and a stator assembly are arranged inside the housing, and the rotor assembly and the stator assembly cooperate with each other. A transmission shaft is arranged on one side of the rotor assembly, and the transmission shaft passes through the front cover 9 and a synchronous pulley is installed on the outer end of the transmission shaft. The synchronous pulley outputs power to the outside to provide power.

[0035] The front cover 9 is provided with a front stator mounting hole, and the rear cover 8 is provided with a rear stator mounting hole. The two ends of the stator assembly are respectively mounted on the front stator mounting hole and the rear stator mounting hole. The stator assembly includes a stator core 5 mounted on the inner wall of the housing and a coil 2 arranged at both ends of the stator core 5. The rotor assembly includes a rotor shaft, and a magnetic steel core 6 is wound around the rotor shaft. Ball bearings are respectively provided at both ends of the rotor shaft, and the rotor shaft passes through the ball bearings and is mounted on the front cover 9 and the rear cover 8.

[0036] A first aluminum end ring 1 and a blind hole 3 are mounted on one side of the magnetic steel core, and a magnetic steel 4 is mounted in the blind hole 3. A second aluminum end ring 7 is mounted on the other side of the magnetic steel core 6. The width of the second aluminum end ring 7 is greater than the straight-line distance between the outer side of the first aluminum end ring 1 and the inner side of the blind hole 3.

[0037] At present, in the existing three-phase AC variable frequency synchronous motors, the two aluminum end rings are identical, and a through hole is opened in the magnetic steel core, and the magnetic steel is installed in the through hole. Taking into account the problem of aluminum end rings and magnetic steel, the length of the magnetic steel is limited to one-third or even less than one-third of the through hole, otherwise it will affect the operation of the motor. In this patent, the second aluminum end ring increases in width, and a blind hole design is adopted at the other end, which can increase the length of the magnetic steel. The installation of the blind hole is more convenient and firm. The width of the second aluminum end ring increases, and the length of the magnetic steel in the blind hole increases, which increases the migration torque of the synchronous motor and improves the synchronization performance.

[0038] A grounding terminal 7 is mounted on the housing 5 , and the grounding terminal 7 is connected to a grounding terminal 9 via a connecting wire 8 .

[0039] A plurality of temperature sensors are arranged around the outer shell 5. The motor controller determines the motor operation status and adjusts the water inlet rate of the cooling coils at different positions according to the values ​​monitored by the temperature sensors, the rotation speed of the motor body and the working time.

[0040] Example 2

[0041] This embodiment is based on the embodiment 1, and a heat dissipation device is added.

[0042] like Figure 4 , Figure 5 As shown, a heat sink is installed on the housing, and the motor controller is electrically connected to the heat sink.

[0043] The heat dissipation device includes a mounting frame arranged on the rear end cover 20 A cooling coil 13 is wound around the housing, and the two ends of the cooling coil 13 are respectively a water inlet end and a water outlet end. The water inlet end and the water outlet end are respectively connected to a water tank 16 installed in a mounting frame 20. A radiator is installed on the water tank 16. The water tank 16 is connected to an external container through an inlet and outlet water pipe 21.

[0044] The radiator includes a base 15 mounted on a mounting frame 20, a micro motor 14 is mounted on the base 15, the micro motor 14 is connected to a fan seat 19, and a fan blade 17 is mounted on the fan seat 19. Through holes are designed through the base and the fan seat 19, and the inlet and outlet water pipes 21 pass through the through holes. In this embodiment, a filter 18 is installed in the mounting frame 20 to filter the inlet and outlet air and prevent debris from entering.

[0045] The heat dissipation adopts the dual functions of air cooling and water cooling, which has good heat dissipation effect, simple structure and easy maintenance.

[0046] The invention has a simple structure and is easy to install. It uses water cooling to dissipate heat, thereby improving the cooling effect. At the same time, with the function of the control valve, it can achieve different cooling effects at different positions.

[0047] Example 3

[0048] This embodiment is based on the embodiment 2, and a height adjustment mechanism is added.

[0049] like Figure 6 As shown, the height adjustment mechanism includes an adjustment base 29, and a plurality of adjustment seats 25 are installed on the adjustment base 29. A lifting mechanism is installed on the adjustment seat 25, and a connecting seat is connected to the lower end of the housing at the upper end of the lifting mechanism.

[0050] In this embodiment, the lifting mechanism includes an adjustment cavity provided in the adjustment seat 25, and a horizontal rotating disk 28 is provided in the adjustment cavity, and an internal thread is provided on the inner wall of the rotating disk 28. A threaded rod 26 is slidably mounted on the adjustment seat 25 and the adjustment base 29. The threaded rod 26 is threadedly connected in the rotating disk 28. An adjustment window 27 corresponding to the rotating disk is provided on the adjustment seat 25, and the rotating disk 28 can be rotated by manual rotation. The rotation of the rotating disk 28 drives the threaded rod 26 to rise and fall.

[0051] The connecting seat includes a lower arc seat 24 at the bottom and an upper square seat 23 at the top. A U-shaped seat is arranged inside the lower arc seat 24, and connecting holes 22 are arranged on both sides of the U-shaped seat. The upper part of the threaded rod 26 is connected to the U-shaped seat through a pin and two connecting holes.

[0052] By adjusting the height adjustment mechanism, the installation of the three-phase AC variable frequency synchronous motor at multiple angles can be achieved, and the structure is stable and will not generate additional vibration.

[0053] Example 4

[0054] This embodiment is based on the third embodiment, and a power source is added to the height adjustment mechanism to rotate the rotating disk.

[0055] like Figure 7 As shown, a motor 31 is installed on one side of the adjustment base 29, and the motor 31 is connected to a driving wheel 30. The driving wheel 30 is connected to the rotating disk through a transmission belt.

[0056] The advantage of motor drive is that it can achieve adjustment in a confined space, eliminating the position that is difficult to reach with hands and reducing the difficulty of adjustment.

[0057] The present invention adopts an adjustable base for installation, which is convenient and practical, and the adjustable base can realize multi-angle adjustment and adjustment of different angles of the front and rear parts, thereby increasing the convenience of using the motor.

[0058] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0059] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A three-phase AC variable frequency synchronous motor, characterized in that: It includes a motor host and a motor controller; the motor host includes a housing, a front cover and a rear cover; a rotor assembly and a stator assembly are arranged inside the housing, and the rotor assembly and the stator assembly cooperate with each other; a transmission shaft is arranged on one side of the rotor assembly, the transmission shaft passes through the front cover and a synchronous pulley is installed on the outer end of the transmission shaft; a heat sink is installed on the housing, and the motor controller is electrically connected to the heat sink; a grounding terminal is installed on the housing, and the grounding terminal is connected to the grounding terminal through a connecting wire; the motor host is installed on the height adjustment mechanism; The front end cover is provided with a front stator mounting hole, and the rear end cover is provided with a rear stator mounting hole; the two ends of the stator assembly are respectively mounted on the front stator mounting hole and the rear stator mounting hole; the rotor assembly includes a rotor shaft, and a magnetic steel core is wound around the rotor shaft; ball bearings are respectively provided at both ends of the rotor shaft, and the rotor shaft passes through the ball bearings and is mounted on the front end cover and the rear end cover; A first aluminum end ring and a blind hole are installed on one side of the magnetic steel core, and a magnetic steel is installed in the blind hole; a second aluminum end ring is installed on the other side of the magnetic steel core; the width of the second aluminum end ring is greater than the straight-line distance between the outer side of the first aluminum end ring and the inner side of the blind hole; The stator assembly comprises a stator core mounted on the inner wall of the housing and coils arranged at both ends of the stator core; the heat dissipation device comprises a mounting frame arranged on the rear end cover, a cooling coil is wound around the housing, and the two ends of the cooling coil are respectively a water inlet end and a water outlet end; the water inlet end is connected to a water tank mounted in the mounting frame; a radiator is installed on the water tank; the water tank is connected to an external container through an inlet and outlet water pipe; The radiator comprises a base mounted on a mounting frame, a micro motor is mounted on the base, the micro motor is transmission-connected to a fan seat, and fan blades are mounted on the fan seat; through holes are designed through the base and the fan seat, and the inlet and outlet water pipes pass through the through holes; A plurality of temperature sensors are arranged around the shell, and the motor controller determines the motor operation state and adjusts the water inlet rate of the cooling coils at different positions according to the values ​​monitored by the temperature sensors, the rotation speed of the motor body and the working time; The height adjustment mechanism comprises an adjustment base, on which a plurality of adjustment seats are mounted; a lifting mechanism is mounted on the adjustment seat; the upper end of the lifting mechanism is connected to a connecting seat; the connecting seat is connected to the lower end of the housing; The lifting mechanism includes an adjustment cavity arranged in the adjustment seat, and a horizontal rotating disk is arranged in the adjustment cavity; an internal thread is arranged on the inner wall of the rotating disk; a threaded rod is slidably installed on the adjustment seat and the adjustment base; the threaded rod is threadedly connected in the rotating disk; an adjustment window corresponding to the rotating disk is arranged on the adjustment seat; the connecting seat includes a lower arc seat located at the lower part and an upper square seat located at the upper part; a U-shaped seat is arranged inside the lower arc seat, and connecting holes are respectively arranged on both sides of the U-shaped seat; the upper part of the threaded rod is connected to the U-shaped seat through a pin shaft and two connecting holes.

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