Novel integrated switch type bearingless permanent magnet synchronous motor with high heat dissipation performance

Abstract

The utility model discloses a novel integrated switch type bearingless permanent magnet synchronous motor with high heat dissipation performance. Compared with a traditional motor, bearing abrasion is reduced, heat dissipation efficiency is improved, efficient electric energy conversion and control are achieved, and the motor has the high-working-intensity processing capacity and the rapid switching characteristic and comprises the steps that permanent magnets are added to a rotor of the motor, distributed windings are adopted on a stator and divided into torque windings and suspension force windings, and interaction is achieved; a centrifugal fan is additionally arranged at the rear end of the motor, a temperature sensor and a magnetic sensor are additionally arranged on the centrifugal fan, the motor is sensed, regulated and controlled, the loss efficiency is improved, an IGBT (Insulated Gate Bipolar Translator) and a heat dissipation plate are additionally arranged on the stator, and the motor is driven to rotate and suspend; and the output pole of the IGBT is in closed-loop connection with the torque winding and the suspension force winding on the stator, and is connected with the output ends of the temperature sensor and the magnetic sensor on the centrifugal fan, so that the control precision of the motor is improved, the circuit design is simplified, and the system efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, specifically to a novel integrated switch-type bearingless permanent magnet synchronous motor with high heat dissipation. Background Technology

[0002] Traditional permanent magnet synchronous motors require mechanical bearings to support the rotor, resulting in frictional losses between the bearings and the rotor, high maintenance costs, and problems such as vibration and noise. Bearingless permanent magnet synchronous motors, on the other hand, use windings on the stator that generate radial forces. These windings, by controlling the direction and magnitude of the current, produce electromagnetic forces related to the rotor's position, thereby achieving rotor levitation control. However, current technology is still limited by the following issues:

[0003] 1. Under high load conditions, motors are prone to high temperatures, which can affect their performance and lifespan. Furthermore, the magnetic field of the permanent magnet material may decay, leading to a decline in motor performance.

[0004] 2. The system integration and control are difficult and the circuitry is complex. Utility Model Content

[0005] The purpose of this invention is to provide a novel integrated switch-type bearingless permanent magnet synchronous motor with high heat dissipation, which solves the problems of insufficient heat dissipation, complex structure, and difficult control in the prior art.

[0006] The specific plan is as follows:

[0007] A novel high-heat-dissipation integrated switch-type bearingless permanent magnet synchronous motor includes a rotor, a stator, permanent magnets, torque windings, and levitation windings. The rotor is located inside the stator. There are four permanent magnets, which are evenly installed on the outer surface of the rotor along the circumferential direction. The inner wall of the stator is equally divided into grooves along the circumferential direction, and distributed windings are wound on the teeth between adjacent grooves, which are divided into 12 phases. Each phase consists of a torque winding and a levitation winding phase.

[0008] Furthermore, a centrifugal fan, a fan cover, and fan cooling holes are added to the rear of the motor. The centrifugal fan is equipped with a temperature sensor and a magnetic sensor, and a motor base is provided at the bottom of the motor.

[0009] Furthermore, the stator is equipped with an IGBT, and a copper-based heat sink is welded to the bottom of the IGBT. The output pole of the IGBT is connected in a closed loop with the torque winding and the levitation winding, and is interconnected with the output terminals of the temperature sensor and the magnetic sensor on the centrifugal fan.

[0010] Furthermore, this application includes the following technical features:

[0011] 1. Bearingless suspension structure; the stator core adopts a 12-slot distributed winding, and each phase winding is divided into a torque winding and an auxiliary suspension force winding, which realizes the static suspension and stable rotation of the rotor through electromagnetic force.

[0012] 2. IGBT integration and heat dissipation design: The IGBT switching module is directly soldered to the stator end ring circuit board and connected to the temperature sensor and magnetic sensor on the fan. A heat sink is installed at the bottom, and the heat sink is made of copper.

[0013] 3. High heat dissipation system: A centrifugal fan is added to the outside of the stator, and a temperature sensor and a magnetic sensor are added to the centrifugal fan to control the speed of the fan shaft by monitoring the rotor.

[0014] The advantages of this utility model are:

[0015] 1. By eliminating mechanical bearings, there is no mechanical wear, resulting in a longer lifespan, lower maintenance costs, and less noise during operation.

[0016] 2. Magnetic levitation technology can better control the current of electromagnets, reduce power loss, and improve energy efficiency.

[0017] 3. The switching module has low loss and high frequency during switching, strong thermal stability, can accurately adjust precision power and has strong anti-interference ability, which fully ensures the stability of the system.

[0018] 4. Temperature and magnetic sensors can better monitor the motor, effectively control the fan speed, better increase heat dissipation and reduce energy consumption, and fully regulate heat dissipation. Attached Figure Description

[0019] Figure 1 This is an external view of a novel high-heat-dissipation integrated switch-type permanent magnet synchronous motor structure according to this utility model.

[0020] Figure 2 This is a cross-sectional view of the internal structure of a novel high-heat-dissipation integrated switch-type permanent magnet synchronous motor according to this utility model.

[0021] Figure 3 This is a schematic diagram of a centrifugal fan structure added to the stator of a novel high-heat-dissipation integrated switch-type permanent magnet synchronous motor according to this utility model.

[0022] Figure 4 This utility model presents a schematic diagram of the structure of any one of the 12 IGBTs in a novel high-heat-dissipation integrated switching permanent magnet synchronous motor.

[0023] Figure 5This utility model discloses a circuit diagram of IGBT connection sensors and windings in a novel high-heat-dissipation integrated switching permanent magnet synchronous motor.

[0024] List of reference numerals in the attached diagram:

[0025] 1-Rotor core; 2-Fan shroud; 3-Fan cooling hole; 4-Motor base; 5-Torque winding; 6-Suspension winding; 7-Permanent magnet; 8-Rotor; 9-Stator; 20-Fan blade; 21-Shaft; 22-Temperature sensor; 23-Magnetic sensor; 10-ia; 11-IGBT; 12-Copper-based heat sink; 13-ib; 14-Connecting winding circuit; 15-Connecting sensor circuit. Detailed Implementation

[0026] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0027] like Figure 1 The diagram shows the external appearance of the motor. The rotor core 1 is suspended and rotates without bearings. A fan shroud 2 is added to the rear end of the motor, and holes 3 are drilled in the shroud 2 to form fan cooling holes, thereby improving the conduction and dissipation of heat inside the motor, helping to maintain the normal operating temperature of the equipment and preventing overheating damage. A motor base 4 is set at the bottom to support the motor body and press and fix the motor, thereby ensuring the stability of the motor. The fan shroud 2 contains... Figure 3 The centrifugal fan shown.

[0028] like Figure 2 The diagram shows the internal structure of the motor. The stator 9 is made of silicon steel sheets to improve efficiency and stability, reduce energy consumption, and enhance corrosion resistance. The silicon steel sheets of the stator 9 are stacked and cut into 12 slots. Distributed ring windings are used to reduce harmonic losses, optimize the control performance of the magnetic field, enhance mechanical strength, and improve the heat dissipation performance of the motor. There are a total of 12 phase windings, each phase winding is divided into a torque winding 5 and a levitation force winding 6. A permanent magnet 7 provides a stable magnetic field, and the levitation force winding 6 generates a force perpendicular to the rotation axis. Each phase winding generates a magnetic force with the permanent magnet 7, which acts on the rotor 8. The windings are ring-shaped. The magnetic force generated by each phase winding can cancel and balance the magnetic force generated by the corresponding ring winding, overcoming the effect of gravity, so that the rotor 8 can be more stably suspended in the middle of the stator 9, allowing the rotor 8 to run without contact. The torque winding 5 generates a rotational torque to drive the rotor 8 to rotate. The two windings complement each other to improve the efficiency, stability, and high-precision control of the motor.

[0029] like Figure 3The diagram shows the structure of a centrifugal fan added to the rear of the motor. A centrifugal fan is added to the outside of the stator 9, and a temperature sensor 22 and a magnetic sensor 23 are added to the centrifugal fan. The temperature sensor 22 monitors the heat generated by the rotation of the rotor 8 on the motor and the internal circuitry of the motor, and the magnetic sensor 23 monitors the changes in the magnetic field strength generated by the permanent magnet 7. These are converted into measurable electrical signals to regulate the rotation shaft 21 in the fan, thereby changing the speed of the fan blades 20 in the centrifugal fan. This allows for more precise control of heat dissipation, effectively improving energy efficiency, saving energy and protecting the environment, and reducing noise.

[0030] like Figure 4 The diagram shows a schematic of any one of the 12 IGBT11 modules selected from the motor. The 12 IGBT11 switching modules are arranged in a ring and directly soldered to the circuit board at the end of the stator 9. A copper-based heat sink 12 is connected to the bottom of the IGBT11 using a silver sintering process to quickly dissipate the heat generated by the IGBT11. When the motor is operating, current ia10 flows through torque winding 5 and levitation winding 6 to ib13. The IGBT11 independently adjusts the torque and levitation force by modulating the magnitude and phase of the current flowing between torque winding 5 and levitation winding 6 through pulse width modulation, achieving independent decoupled control of torque and levitation force. The built-in overcurrent protection function of the IGBT11 can quickly cut off abnormal currents, preventing winding overheating or magnetic saturation, ensuring safe system operation, and improving system efficiency and reliability.

[0031] like Figure 5 The diagram shows the circuit diagram of IGBT11 connected to the temperature sensor 22 and magnetic sensor 23 on the fan, the torque winding 5 and the levitation winding 6 on the stator 9. In the sensor circuit 15, the output terminals of the temperature sensor 22 and magnetic sensor 23 are respectively connected to the over-temperature protection circuit and the pulse width modulation unit in IGBT11 to monitor the temperature rise in real time and trigger frequency reduction protection and dynamically adjust the current phase of the levitation winding 6 based on the rotor 8 position signal. In the winding circuit 14, the output terminal of IGBT11 forms a closed-loop circuit with the torque winding 5 and the levitation winding 6 to better perform torque response and control the levitation accuracy, improve the dynamic response of the system, quickly adjust the current to avoid continuous high current, reduce energy loss, optimize efficiency and extend life.

[0032] The technical means disclosed in this utility model are not limited to the above-described implementation scheme, but also include technical solutions that combine any of the above technical features.

Claims

1. A novel high heat dissipation integrated switched bearingless permanent magnet synchronous motor, characterized in that: It includes rotor (8), stator (9), permanent magnet (7), torque winding (5) and suspension force winding (6), the rotor (8) is inside the stator (9), the permanent magnet (7) has four, and is evenly installed in the circumferential direction on the outer surface of the rotor (8), the inner wall of the stator (9) is equally divided and cut in the circumferential direction 12 grooves, and the tooth part between adjacent grooves is wound with distributed winding, and is divided into 12 phases, each phase is composed of torque winding (5) and suspension force winding (6).

2. A novel high heat dissipation integrated switched bearingless permanent magnet synchronous motor according to claim 1, characterized by, The motor rear part is additionally provided with a centrifugal fan, a fan shroud (2) and a fan cooling hole (3), wherein the centrifugal fan is provided with a temperature sensor (22) and a magnetic sensor (23), and the motor bottom is provided with a motor base (4).

3. A novel high heat dissipation integrated switched bearingless permanent magnet synchronous motor according to claim 1, characterized by, The stator (9) is provided with an IGBT (11), a copper-based heat sink (12) is welded at the bottom of the IGBT (11), the output pole of the IGBT (11) is connected in a closed loop with the torque winding (5) and the suspension force winding (6), and the output ends of the temperature sensor (22) and the magnetic sensor (23) on the centrifugal fan are connected with each other.

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