What are the key components inside the permanent magnet submersible motor?

What are the key components inside the permanent magnet submersible motor?

Permanent magnet submersible motor is a device that converts electrical energy into mechanical energy and is widely used in underwater operations, underwater robots, and other fields. It is composed of numerous key components internally, and several of them will be introduced in detail below.

Permanent magnet: Permanent magnet is one of the essential key components of permanent magnet submersible motors. Permanent magnets are composed of materials such as nickel, cobalt, and iron, and have high magnetic permeability and magnetization. By the magnetization effect of permanent magnets, a strong magnetic field can be generated inside the motor, thereby achieving the conversion of electrical energy to mechanical energy.

Bearings: Bearings are key components in permanent magnet submersible motors that play a supporting and guiding role. It can transfer the rotational power of the motor to external devices and maintain the stability of the motor during high-speed rotation. The common types of permanent magnet submersible motor bearings include rolling bearings and sliding bearings.

Winding: The winding is a key component in the permanent magnet submersible motor that plays a role in transmitting electrical energy and generating electromagnetic fields. The winding is composed of the coils that make up the motor. Through the input and output of current, an electromagnetic field is generated and interacts with the permanent magnet, thereby achieving the conversion of electrical energy to mechanical energy.

Stator: The stator is a key component in the permanent magnet submersible motor that plays a role in positioning and generating a rotating magnetic field. The stator is composed of an iron core and a winding. After the winding is energized, it can generate a rotating magnetic field, causing the rotor of the motor to rotate along with the rotating magnetic field.

Rotor: The rotor is a key component that plays a rotating role in permanent magnet submersible motors. A rotor is usually composed of an iron core and a permanent magnet. When current passes through the stator winding, a rotating magnetic field is generated due to the principle of electromagnetic induction, which causes the rotor to follow the rotating magnetic field for rotational motion.

Seals: Seals are key components that isolate the interior of permanent magnet submersible motors from the external environment. Due to the frequent operation of permanent magnet submersible motors underwater, it is necessary to use appropriate sealing components to prevent moisture and impurities from entering the interior of the motor, ensuring the normal operation and service life of the motor.

Cooling system: The cooling system is a key component for maintaining the normal working temperature of permanent magnet submersible motors. Under high load and high speed conditions, permanent magnet submersible motors generate a large amount of heat. If the appropriate temperature cannot be maintained in a timely manner, it will have adverse effects on the efficiency and lifespan of the motor. Therefore, the cooling system is crucial for the stable operation of the motor.

Controller: The controller is a key component within the permanent magnet submersible motor that plays a control and protection role. The controller can adjust the speed and torque of the motor based on external input signals, achieving flexible control and adjustment. At the same time, the controller can also monitor the working status of the motor and take timely measures to protect the motor from damage.