Permanent magnet motor energy-saving system and water pumps, fans, compressors

Abstract

The present invention provides a permanent magnet motor energy-saving system and a water pump, a fan, and a compressor. The water pump, the fan, and the compressor all include the permanent magnet motor energy-saving system. The permanent magnet motor energy-saving system includes a permanent magnet motor, a connector assembly, an insulating base, and a frequency converter. The permanent magnet motor has an end cover assembly for supporting the main shaft of the permanent magnet motor, the bottom of the connector assembly is fixed on the end cover assembly, the insulating base is fixed on the top of the connector assembly, and the frequency converter is fixed on the insulating base. In the present invention, the permanent magnet motor and the frequency converter are intensively designed, which saves more space than the prior art.

Description

Technical Field

[0001] The present invention relates to the technical field of power facilities, and in particular to a permanent magnet motor energy-saving system and a water pump, a fan and a compressor. Background Art

[0002] Water pumps, fans, compressors and other power devices are widely used in industrial production. When water pumps, fans, compressors and other power devices are actually used, there are many occasions where the speed, running time, etc. of the permanent magnet motor inside them need to be precisely controlled. The introduction of frequency converters is a common permanent magnet motor control method in the prior art.

[0003] At present, the power system of water pumps, fans and compressors is provided by a combination of permanent magnet motors and frequency converters. The permanent magnet motors and frequency converters are set separately. The frequency converter is usually set in a distribution cabinet, away from the permanent magnet motors. The two occupy space respectively, which takes up a large space and is not conducive to space saving. Summary of the invention

[0004] In order to overcome the shortcomings of the prior art, the present invention provides a permanent magnet motor energy-saving system and a water pump, a fan, and a compressor. Specifically, the technical solution is as follows:

[0005] A permanent magnet motor energy-saving system comprises a permanent magnet motor, a connector assembly, an insulating base and a frequency converter, wherein the permanent magnet motor has an end cover assembly for supporting the main shaft of the permanent magnet motor, the bottom of the connector assembly is fixed on the end cover assembly, the insulating base is fixed on the top of the connector assembly, and the frequency converter is fixed on the insulating base.

[0006] In some preferred embodiments, a heat sink is further included, and the heat sink is disposed between the frequency converter and the insulating base.

[0007] In some preferred embodiments, the heat dissipation device includes heat dissipation fins, and the contact surface between the heat dissipation fins and the inverter is provided with heat conductive glue.

[0008] In some preferred embodiments, a buffer pad is provided between the heat dissipation device and the insulating base.

[0009] In some preferred embodiments, the end cover assembly includes a first end cover and a second end cover, the first end cover and the second end cover are respectively located at the front and rear ends of the permanent magnet motor, the connector assembly includes a first connecting rod and a second connecting rod, the bottoms of the first connecting rod and the second connecting rod are fixed on the first end cover, and the insulating base is fixed on the tops of the first connecting rod and the second connecting rod;

[0010] And / or, the connector assembly further includes a third connecting rod and a fourth connecting rod, the bottoms of the third connecting rod and the fourth connecting rod are fixed on the second end cover, and the insulating base is fixed on the tops of the third connecting rod and the fourth connecting rod.

[0011] In some preferred embodiments, a plurality of mounting holes are provided on the first end cover and the second end cover along the circumferential direction, bolts are provided in the mounting holes, and the bottom of each connecting rod in the connector assembly is respectively threadedly matched with the bolts.

[0012] In some preferred embodiments, a temperature sensor is provided at the coil of the permanent magnet motor, and the temperature sensor is connected to the frequency converter.

[0013] A water pump comprises the permanent magnet motor energy-saving system described in any of the aforementioned technical solutions.

[0014] A fan comprises the permanent magnet motor energy-saving system described in any of the above technical solutions.

[0015] A compressor comprises the permanent magnet motor energy-saving system described in any of the aforementioned technical solutions.

[0016] The present invention has at least the following beneficial effects:

[0017] The permanent magnet motor energy-saving system provided by the present invention comprises a permanent magnet motor, a connector assembly, an insulating base and a frequency converter, wherein the permanent magnet motor has an end cover assembly for supporting the main shaft of the permanent magnet motor, the bottom of the connector assembly is fixed on the end cover assembly, the insulating base is fixed on the top of the connector assembly, and the frequency converter is fixed on the insulating base. Through the above arrangement, the permanent magnet motor and the frequency converter are designed in an intensive manner, which saves more space than the prior art.

[0018] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. 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 Schematic diagram of the structure of the permanent magnet motor energy-saving system in an embodiment of the present invention.

[0021] Description of main component symbols:

[0022] 1-spindle;

[0023] 2-bolts;

[0024] 3- first end cover;

[0025] 41- first connecting rod;

[0026] 42- second connecting rod;

[0027] 5-Insulation base;

[0028] 6- cushion;

[0029] 7- heat dissipation device;

[0030] 8-Inverter. DETAILED DESCRIPTION

[0031] Hereinafter, various embodiments of the present invention will be described more fully. The present invention may have various embodiments, and adjustments and changes may be made therein. However, it should be understood that there is no intention to limit the various embodiments of the present invention to the specific embodiments disclosed herein, but the present invention should be understood to cover all adjustments, equivalents and / or alternatives falling within the spirit and scope of the various embodiments of the present invention.

[0032] Hereinafter, the term "include" or "may include" used in various embodiments of the present invention indicates the presence of disclosed functions, operations or elements, and does not limit the addition of one or more functions, operations or elements. In addition, as used in various embodiments of the present invention, the terms "include", "have" and their cognates are intended only to indicate specific features, numbers, steps, operations, elements, components or combinations of the foregoing items, and should not be understood as first excluding the presence of one or more other features, numbers, steps, operations, elements, components or combinations of the foregoing items or the possibility of adding one or more features, numbers, steps, operations, elements, components or combinations of the foregoing items.

[0033] In various embodiments of the present invention, the expression "or" or "at least one of A or / and B" includes any combination or all combinations of the words listed at the same time. For example, the expression "A or B" or "at least one of A or / and B" may include A, may include B, or may include both A and B.

[0034] The expressions (such as "first", "second", etc.) used in various embodiments of the present invention may modify the various constituent elements in various embodiments, but may not limit the corresponding constituent elements. For example, the above expressions do not limit the order and / or importance of the elements. The above expressions are only used for the purpose of distinguishing an element from other elements. For example, the first user device and the second user device indicate different user devices, although both are user devices. For example, without departing from the scope of various embodiments of the present invention, the first element may be referred to as the second element, and similarly, the second element may also be referred to as the first element.

[0035] It should be noted that in the present invention, unless otherwise clearly specified and defined, the terms such as "installation", "connection", "fixation" 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; it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In the present invention, those skilled in the art need to understand that the terms indicating orientation or positional relationship herein are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0037] The terms used in various embodiments of the present invention are only used for the purpose of describing specific embodiments and are not intended to limit various embodiments of the present invention. As used herein, the singular form is intended to also include the plural form, unless the context clearly indicates otherwise. Unless otherwise limited, all terms used here (including technical terms and scientific terms) have the same meaning as the meaning generally understood by those of ordinary skill in the art to which the various embodiments of the present invention belong. The terms (such as the terms defined in the dictionary generally used) will be interpreted as having the same meaning as the contextual meaning in the relevant technical field and will not be interpreted as having an idealized meaning or an overly formal meaning, unless clearly defined in various embodiments of the present invention.

[0038] Example 1

[0039] This embodiment provides a permanent magnet motor energy-saving system. Specifically, Figure 1As shown, it includes a permanent magnet motor, a connector assembly, an insulating base 5 and a frequency converter 8. The permanent magnet motor has an end cover assembly for supporting the main shaft 1 of the permanent magnet motor, the bottom of the connector assembly is fixed on the end cover assembly, the insulating base 5 is fixed on the top of the connector assembly, and the frequency converter 8 is fixed on the insulating base 5.

[0040] Through the above arrangement, the permanent magnet motor and the frequency converter 8 are designed in an intensive manner, which saves more space compared with the prior art.

[0041] Among them, the permanent magnet motor is used to provide power for rotation or linear sliding. The permanent magnet motor is a motor that generates a magnetic field by excitation of a permanent magnet. The coil winding generates an induced current through armature reaction under the action of the magnetic field. The variable-frequency drive (VFD) is a power control device that controls the AC motor by changing the frequency of the motor's working power supply using frequency conversion technology and microelectronics technology.

[0042] In this embodiment, since the frequency converter 8 is provided, the speed, running time, etc. of the permanent magnet motor can be accurately controlled.

[0043] Preferably, a heat sink 7 is further included, and the heat sink 7 is disposed between the frequency converter 8 and the insulating base 5. In this embodiment, since the heat sink 7 is disposed, the heat generated by the frequency converter 8 during operation can be dissipated in time to avoid damage to the frequency converter 8.

[0044] Preferably, the heat dissipation device 7 includes heat dissipation fins, and the contact surface between the heat dissipation fins and the inverter 8 is provided with thermal conductive adhesive. Specifically, the top of the heat dissipation fin is connected to the bottom of the inverter 8 through the thermal conductive adhesive, and the heat generated by the inverter 8 can be quickly transferred to the heat dissipation fins through the thermal conductive adhesive and flow out from the heat dissipation fins.

[0045] Preferably, the heat dissipation fins and the insulating base 5 are fixedly connected by fasteners such as screws and rivets.

[0046] Preferably, a buffer pad 6 is provided between the heat sink 7 and the insulating base 5. Preferably, the buffer pad 6 is an annular structure, and the width of the annular portion of the buffer pad 6 is preferably 2-3 cm, and the thickness is 2-3 cm. The buffer pad 6 is clamped by bolts between the insulating base 5 and the heat sink fins, and the inverter 8 is arranged on the heat sink fins. Since the buffer pad 6 is provided, the vibration of the motor during operation can be prevented from being transmitted to the inverter 8, so that the inverter 8 can work stably.

[0047] Preferably, the end cover assembly includes a first end cover 3 and a second end cover, and the first end cover 3 and the second end cover are respectively located at the front and rear ends of the permanent magnet motor. Correspondingly, the connector assembly includes a first connecting rod 41 and a second connecting rod 42, the bottoms of the first connecting rod 41 and the second connecting rod 42 are fixed on the first end cover 3, and the insulating base 5 is fixed on the tops of the first connecting rod 41 and the second connecting rod 42.

[0048] Preferably, the connector assembly further includes a third connecting rod and a fourth connecting rod, the bottoms of the third connecting rod and the fourth connecting rod are fixed on the second end cover, and the insulating base 5 is fixed on the tops of the third connecting rod and the fourth connecting rod.

[0049] Preferably, a plurality of mounting holes are provided on the first end cover 3 and the second end cover along the circumferential direction, bolts 2 are provided in the mounting holes, and the bottom of each connecting rod in the connector assembly is respectively threadedly matched with the bolts 2. As a preferred threaded matching mode, the bottoms of the first connecting rod 41, the second connecting rod 42, the third connecting rod and the fourth connecting rod are respectively provided with fixed nuts integrally or non-integrally, and when the nuts are tightened with the bolts 2, the bottoms of the first connecting rod 41 and the second connecting rod 42 are respectively fixed on the first end cover 3, and the bottoms of the third connecting rod and the fourth connecting rod are respectively fixed on the second end cover.

[0050] Preferably, a temperature sensor is provided at the coil of the permanent magnet motor, and the temperature sensor is connected to the frequency converter 8. In order to protect the motor, a temperature sensor is provided at the motor coil. Since the temperature sensor is connected to the frequency converter 8, the temperature signal at the coil of the permanent magnet motor is connected to the controller of the frequency converter 8. The monitoring and control of the temperature of the permanent magnet motor can be performed through the controller of the frequency converter 8, and the system is further integrated.

[0051] Example 2

[0052] This embodiment provides a water pump (not shown in the figure) for liquid transportation. Specifically, it includes the permanent magnet motor energy-saving system provided in Embodiment 1.

[0053] Example 3

[0054] This embodiment provides a fan (not shown in the figure) for promoting gas flow. Specifically, it includes the permanent magnet motor energy-saving system provided in Embodiment 1.

[0055] Example 4

[0056] A compressor (not shown in the figure) is used to compress gas. Specifically, it includes the permanent magnet motor energy-saving system provided in Example 1.

[0057] Those skilled in the art will appreciate that the accompanying drawings are merely schematic diagrams of a preferred implementation scenario, and the modules or processes in the accompanying drawings are not necessarily required for implementing the present invention.

[0058] Those skilled in the art will appreciate that the modules in the device in the implementation scenario can be distributed in the device in the implementation scenario according to the implementation scenario description, or can be changed accordingly and located in one or more devices different from the implementation scenario. The modules in the above implementation scenario can be combined into one module, or can be further split into multiple sub-modules.

[0059] The above serial numbers of the present invention are only for description and do not represent the advantages or disadvantages of the implementation scenarios.

[0060] The above disclosure is only a few specific implementation scenarios of the present invention, but the present invention is not limited thereto, and any changes that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A permanent magnet motor energy-saving system, characterized in that: It comprises a permanent magnet motor, a connector assembly, an insulating base, a heat sink and a frequency converter, wherein the permanent magnet motor has an end cover assembly for supporting the main shaft of the permanent magnet motor, the bottom of the connector assembly is fixed on the end cover assembly, the insulating base is fixed on the top of the connector assembly, and the frequency converter is fixed on the insulating base; the heat sink is arranged between the frequency converter and the insulating base; a buffer pad is arranged between the heat sink and the insulating base, and the buffer pad is an annular structure; the end cover assembly comprises a first end cover and a second end cover, the first end cover and the second end cover are respectively located at the front and rear ends of the permanent magnet motor, the connector assembly comprises a first connecting rod and a second connecting rod, the bottoms of the first connecting rod and the second connecting rod are fixed on the first end cover, and the insulating base is fixed on the tops of the first connecting rod and the second connecting rod; and / or, the connector assembly further comprises a third connecting rod and a fourth connecting rod, the bottoms of the third connecting rod and the fourth connecting rod are fixed on the second end cover, and the insulating base is fixed on the tops of the third connecting rod and the fourth connecting rod; The heat dissipation device includes a heat dissipation fin, the buffer pad is clamped between the insulating base and the heat dissipation fin, the contact surface between the heat dissipation fin and the inverter is provided with a thermal conductive adhesive, the top of the heat dissipation fin is connected to the bottom of the inverter through the thermal conductive adhesive, and the heat dissipation fin and the insulating base are fixedly connected by a fastener; The first end cover and the second end cover are provided with a plurality of mounting holes along the circumferential direction, bolts are provided in the mounting holes, and the bottoms of the connecting rods in the connecting member assembly are respectively matched with the bolt threads.

2. The permanent magnet motor energy-saving system according to claim 1, characterized in that: A temperature sensor is provided at the coil of the permanent magnet motor, and the temperature sensor is connected to the frequency converter.

3. A water pump, characterized in that: A permanent magnet motor energy-saving system comprising any one of claims 1-2.

4. A fan, characterized in that: A permanent magnet motor energy-saving system comprising any one of claims 1-2.

5. A compressor, characterized in that: A permanent magnet motor energy-saving system comprising any one of claims 1-2.

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