Which is better between a rotor motor and a stator motor

Which is better, a rotor motor or a stator motor

Rotary motors and stator motors each have their own advantages and disadvantages, and the specific choice should be determined based on the application scenario. Below is a comprehensive comparative analysis:

1. Core Conclusions
Stator motors offer greater advantages in power density and efficiency, while rotor motors (especially permanent magnet synchronous motors) perform better in terms of noise, weight, and cost.

II. Detailed Comparison
Structure and Function
Stator motor: The stator remains stationary and generates a rotating magnetic field through three-phase windings, driving the rotor to rotate. Suitable for high-power, high-efficiency applications.
Rotor motor: The rotor is movable, and the magnetic field is generated by permanent magnets or electromagnetic excitation. Permanent magnet synchronous motors have a simpler structure and lower noise due to the absence of excitation windings.

performance advantage
Stator motor: High power density, suitable for heavy-duty applications (such as industrial machinery).
The winding insulation requirements are high, and the cooling system is more advanced.
Rotor motor: Low friction loss, lightweight, suitable for light-load or high-speed scenarios (such as electric vehicles).
Permanent magnet technology is mature and has relatively low costs.

Application scenarios
Stator motor: commonly used in scenarios requiring high torque and stability, such as factory equipment and large machinery.
Rotor motor: Commonly used in applications sensitive to noise, weight, and cost, such as electric vehicles and household appliances.

Technological Development Trends
The stator motor is moving towards high-slot-count designs (e.g., 72 slots) and optimized thin laminations to enhance efficiency.
The rotor motor continuously improves permanent magnet fixing technology and silent groove design to reduce energy consumption.

III. Selection Recommendations
Priority stator motor: For applications requiring high power, high efficiency, or heavy-duty loads.
Preferred rotor motor: suitable for applications with strict requirements on noise, weight, and cost, and for light loads or high-speed operation.