The permanent magnet linear motor can be regarded as a structural change of the rotary motor, that is, the rotary motor is cut in one plane along the radial direction. This is the origin of the original linear motor, which. converts the rotation of the rotary motor into a plane. The motion is converted into linear motion of a linear motor. A rotary motor is divided into a stator and a rotor, while a linear motor is divided into a primary (stator) and a secondary (motor). The fixed side is called primary or stator, and the moving side is called secondary or. Move. Linear motors can generally be divided into induction linear motors, reluctance linear motors and permanent magnet linear motors. Their development over the years has made the technology very mature. and reliability are relatively high, but the disadvantages are low power density, low power factor, faible mechanical stress, etc. Reluctance linear motors have the advantages of efficiency, high power density and low cost, but they are very The fatal disadvantage is that the power factor is very low. With the continuous development of permanent magnets, the various advantages of permanent magnet motors have been continuously promoted, and permanent magnet linear motors have gradually been appreciated by people. Permanent magnet linear motor has high power density, high efficiency and high power factor, but its manufacturing cost is also slightly higher. These three types of linear motors are compared to each other. If used in a free piston Stirling power generation system, the permanent magnet linear motor is more suitable. It offers the best overall performance and is the best choice among the three types.
The enginesPermanent magnet linear magnets are classified in many ways according to their structure types, they can be divided into flat type, cylindrical type, disc type and arc type. According to the relative lengths of the stator and the motor, permanent magnet linear motors can be divided into: long stator permanent magnet linear motors and long motor permanent magnet linear motors.
Sectional view of the permanent magnet cylindrical linear generator