Self-starting permanent magnet synchronous vibration motor
Through the self-starting permanent magnet synchronous vibration motor structure, combined with the cage rotor and permanent magnet excitation, the existing vibration motor has been solved, and the effects of high efficiency, energy saving and self-starting are achieved.
Patent Information
- Application Number
- CN202421817565.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-29
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-07-29
AI Technical Summary
The existing vibration motor has low efficiency and power factor, and requires the frequency converter to assist in starting, which is costly.
The self-starting permanent magnet synchronous vibration motor structure is adopted, combined with the cage rotor and permanent magnet excitation, the frequency converter is cancelled, and the self-starting is achieved through the synchronous torque of the stator winding and the permanent magnet magnetic field. The rotor is embedded with permanent magnets, and the stator coil is a double-layered winding structure, and the air gap design is optimized.
It achieves high efficiency, high power factor, energy saving, and has self-starting capabilities, reduces production costs and improves parts versatility and assembly capabilities.
Smart Images
Figure CN223066984U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of vibration motors, in particular to a self-starting permanent magnet synchronous vibration motor. Background Art
[0002] With the rapid development of my country's economy and society, the demand for energy is increasing. At present, the vibration motors used in general vibration machinery are mainly squirrel cage three-phase asynchronous vibration motors. The three-phase asynchronous vibration motor is an excitation source that combines a power source and an excitation source. The three-phase asynchronous vibration motor is to install a set of adjustable excitation blocks at both ends of the rotor shaft, and use the centrifugal force generated by the high-speed rotation of the shaft and the excitation block to obtain the excitation force. The speed of the three-phase asynchronous motor always lags behind the speed of the stator magnetic field, and the efficiency and power factor are low, which is not energy-saving.
[0003] Permanent magnet synchronous motor has low noise and obvious energy saving effect. It has a wide economic operation range and can have high power factor and high efficiency in the effective rated load range of 25% to 120%. It has high operating efficiency, permanent magnet excitation in the rotor, no rotor winding and low loss of stator winding. The motor performance is much less affected by the air gap length than the induction motor, so the air gap is much larger than the induction motor of the same power.
[0004] After searching, we found that in the field of vibration motors, the rotors are all three-phase asynchronous motor rotors. Combining the advantages of permanent magnet synchronous motors, our company has successfully applied the relevant technologies of permanent magnet synchronous motors to vibration motors after scientific research, thus forming permanent magnet synchronous vibration motors, which have the advantages of high efficiency, high power factor and energy saving. Utility Model Content
[0005] 1. Technical issues to be resolved
[0006] In view of the deficiencies in the prior art, the utility model provides a self-starting permanent magnet synchronous vibration motor to solve the problem.
[0007] (II) Technical solution
[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a self-starting permanent magnet synchronous vibration motor, comprising a base, end covers are arranged at both ends of the base, vibration end covers are arranged on the outer side of the end covers, a rotatable rotor is installed at the axis of the base, and both ends of the rotor extend into the vibration end covers.
[0009] A stator is arranged around the inner wall of the base, and the stator is located outside the rotor.
[0010] Spacers and bearings are provided at both ends of the rotor, and inner and outer sides of the bearings are provided with bearing inner covers and bearing outer covers respectively. The space formed by the spacers, the bearing inner covers and the bearing outer covers seals the bearings.
[0011] Inside the vibration end cover, a fixed excitation block and an adjustable excitation block are respectively arranged, and the adjustable excitation block is fixed on the rotor in an eccentric manner.
[0012] As a further preference, the rotor includes a rotating shaft, a permanent magnet, and a rotor punching sheet. Damping grooves are provided on the surface of the rotor punching sheet, and damping guide bars are formed after casting aluminum in the grooves, and the damping guide bars are wrapped by damping end rings.
[0013] As a further preference, the stator includes a stator punching sheet and a stator coil.
[0014] As a further preference, the stator coil is of a double-layer overlapping winding structure.
[0015] As a further preference, starting from the axis, a plurality of slots are circumferentially distributed on the inner circle of the stator punching sheet.
[0016] (III) Beneficial effects
[0017] The utility model provides a self-starting permanent magnet synchronous vibration motor, which has the following beneficial effects:
[0018] 1. The self-starting permanent magnet synchronous vibration motor is improved from the structure of a three-phase asynchronous vibration motor, and has the characteristics of large rated torque, high power factor, high efficiency, and energy saving. At the same time, it has the starting performance characteristics of a cage-type asynchronous motor, has the advantages of both motors, and has stronger part universality and assembly ability.
[0019] 2. The self-starting permanent magnet synchronous vibration motor can be directly connected to the grid power supply without the need to purchase an inverter, saving the purchase cost for users. Description of the drawings
[0020] Figure 1 It is a schematic structural diagram of the utility model;
[0021] Figure 2 It is a side view of a partial structure of the utility model.
[0022] In the figure: 1. Vibration end cover; 2. Bearing outer cover; 3. End cover; 4. Machine base; 5. Stator; 6. Rotor; 7. Spacer; 8. Bearing inner cover; 9. Bearing; 10. Fixed excitation block; 11. Adjustable excitation block; 12. Stator coil; 13. Stator punching sheet; 14. Damping end ring; 15. Damping guide bar; 16. Permanent magnet; 17. Rotating shaft; 18. Rotor punching sheet. Specific embodiments
[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.
[0024] As Figure 1-2 shown, the present invention provides a technical solution: a self-starting permanent magnet synchronous vibration motor, which includes a machine base 4. End covers 3 are provided at both ends of the machine base 4. A vibration end cover 1 is sleeved outside the end cover 3. A rotatable rotor 6 is installed at the axis center of the machine base 4. Both ends of the rotor 6 extend into the vibration end cover 1.
[0025] On the inner wall of the machine base 4, a stator 5 is circumferentially arranged. The stator 5 includes a stator punching sheet 13 and a stator coil 12 also called a stator winding. The stator coil 12 is a double-layer overlapping winding structure. Starting from the axis, 54 slots are circumferentially distributed in the inner circle of the stator punching sheet 13. The stator punching sheet 13 adopts the lamination type of a Y2 series asynchronous motor. The air gap between the stator and the rotor is 0.05 - 0.20 mm larger than that of an asynchronous motor. The stator 5 is a skewed slot, and the skewed slot is the tooth pitch of 1 slot to reduce the cogging torque and reduce stray losses, vibration and noise. The stator 5 is located outside the rotor 6.
[0026] The rotor 6 includes a rotating shaft 17, a permanent magnet 16 and a rotor punching sheet 18. 42 damping slots are provided on the surface of the rotor punching sheet 18. After casting aluminum in the slots, damping guide bars 15 are formed. The damping guide bars 15 are wrapped by damping end rings 14.
[0027] At both ends of the rotor 6, a spacer 7 and a bearing 9 are respectively provided. An inner bearing cover 8 and an outer bearing cover 2 are respectively arranged on the inner and outer sides of the bearing 9. The space jointly formed by the spacer 7, the inner bearing cover 8 and the outer bearing cover 2 seals the bearing 9.
[0028] A fixed excitation block 10 and an adjustable excitation block 11 are respectively arranged in the vibration end cover 1. Among them, the adjustable excitation block 11 is fixed on the rotor 6 in an eccentric manner.
[0029] Meanwhile, the content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.
[0030] In this application, the rotor is excited by adding neodymium iron boron rare earth permanent magnet material. The main difference is reflected in the rotor structure. The rotor is embedded with a permanent magnet. When the stator coil 12 is powered on, the vibration motor first enters the asynchronous starting stage, and then the speed gradually increases until the synchronous torque generated by the stator winding magnetic field and the rotor permanent magnet magnetic field jointly act to pull the rotor 6 into synchronization, thereby realizing the synchronous speed.
[0031] This vibrating motor has an internal rotor structure. The permanent magnets are located in the iron core between the bars and the rotating shaft. Since the quadrature-axis magnetic reluctance is less than the direct-axis magnetic reluctance and the rotor magnetic circuit is asymmetric, the resulting reluctance torque improves the overload capacity and torque density of the vibrating motor. The vibrating motor adopts a self-starting method. When three-phase symmetrical alternating current is applied to the three-phase symmetrical windings, a synchronous magnetic field is generated in the air gap. The rotor part uses a cage winding and permanent magnet excitation, and it can self-start without a frequency converter, featuring high production efficiency and energy conservation.
[0032] In summary, this self-starting permanent magnet synchronous vibrating motor changes the traditional excitation winding and excitation power supply structure of synchronous motors. The combination of a cage rotor and permanent magnets enables self-starting without an external frequency converter. It has the advantages of high efficiency, high power factor, and energy conservation. It also has the characteristics of a large rated torque of a permanent magnet synchronous motor and a good starting performance of a cage asynchronous vibrating motor. Compared with an asynchronous motor of the same power, the lowest operating temperature is 10 - 20 °C lower under the same load conditions.
[0033] The following table shows the performance comparison between the self-starting permanent magnet synchronous vibrating motor and the ordinary three-phase asynchronous vibrating motor
[0034]
[0035]
[0036] It can be seen from the above table that the permanent magnet synchronous vibrating motor involved in this application has significantly lower losses than the traditional asynchronous vibrating motor, and is significantly higher than the traditional asynchronous vibrating motor in terms of power and efficiency.
[0037] It should be noted that the electrical components mentioned in this article are all electrically connected to the external main controller and 220V or 380V mains power. And the main controller can be a conventional known device such as a computer for control. Its control principle, internal structure, and control switching method are all conventional means of the existing technology and are directly cited here without further elaboration. In this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.
[0038] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.
Claims
1. A self-starting permanent magnet synchronous vibration motor, characterized in that: It includes a machine base (4). End covers (3) are arranged at both ends of the machine base (4). A vibration end cover (1) is sleeved outside the end cover (3). A rotatable rotor (6) is installed at the axis center of the machine base (4), and both ends of the rotor (6) extend into the vibration end cover (1). A stator (5) is arranged around the inner wall of the machine base (4), and the stator (5) is located outside the rotor (6). Spacer rings (7) and bearings (9) are respectively arranged at both ends of the rotor (6). An inner bearing cover (8) and an outer bearing cover (2) are respectively arranged on the inner and outer sides of the bearing (9). The space formed by the spacer ring (7), the inner bearing cover (8), and the outer bearing cover (2) seals the bearing (9). A fixed excitation block (10) and an adjustable excitation block (11) are respectively arranged in the vibration end cover (1), and the adjustable excitation block (11) is fixed on the rotor (6) in an eccentric manner.
2. The self-starting permanent magnet synchronous vibration motor according to claim 1, characterized in that: The rotor (6) includes a rotating shaft (17), a permanent magnet (16), and a rotor punching sheet (18). Damping grooves are arranged on the surface of the rotor punching sheet (18). After casting aluminum in the grooves, damping guide bars (15) are formed, and the damping guide bars (15) are wrapped by damping end rings (14).
3. The self-starting permanent magnet synchronous vibration motor according to claim 1, characterized in that: The stator (5) includes a stator punching sheet (13) and a stator coil (12).
4. The self-starting permanent magnet synchronous vibration motor according to claim 3, wherein: The stator coil (12) is of a double-layer overlapping winding structure.
5. The self-starting permanent magnet synchronous vibration motor according to claim 3, wherein: Starting from the axis, a plurality of slots are circumferentially distributed on the inner circle of the stator punching sheet (13).