Publish Time: 2023-11-01 Origin: Site
A linear induction electric motor is an electric transmission device that does not have a conversion device from rotary motion to linear motion, and can directly convert electrical energy into linear mechanical energy. There are mainly three types of linear induction electric motors: flat plate type, cylindrical type and ring disk type, among which the flat plate type is the most widely used.
Here is the list
flat electric motor
Cylinder type electric motor
Disc type electric motor
Linear induction electric motors can be seen as an evolution from rotary induction electric motors. It is envisaged that the rotary induction electric motor is cut radially, the circumference is expanded into a straight line, and a flat linear induction electric motor is obtained (the rotary electric motor is transformed into a linear induction electric motor). The side originating from the stator is called the primary side and the side originating from the rotor is called the secondary side.
Due to the relative motion between the primary side and the secondary side during operation, in order to ensure that the electromagnetic coupling between the primary side and the secondary side remains unchanged within the required stroke range, in practical applications, the primary side and the secondary side are Sides must be connected. The length of the secondary side is different, either the primary side is long and the secondary side is short, or the primary side is short and the secondary side is long. The former is called the long primary and the latter is called the short primary (flat linear induction electric motor shown). Because the structure of the short primary side is relatively simple, and the manufacturing cost and operating cost are relatively low, except for special occasions, the short primary side is generally used.
The primary side of the flat linear induction electric motor shown is only on one side of the secondary side, and this structure is called a unilateral type. Its biggest feature is that there is a large reverse suction between the secondary side and the secondary side, which is not desirable in most cases. If the primary side is installed on both sides of the secondary side, the reverse suction can cancel each other out. This structure is called a bilateral type, a bilateral linear induction electric motor.
The secondary side iron core of the flat linear induction electric motor is made of silicon steel sheet, and the side opposite to the secondary side has a slot, and the winding is placed in the slot. Windings can be single-phase, two-phase, three-phase or multi-phase. There are two secondary side structures: one is the grid structure, the iron core is slotted, and the guide bars are placed in the groove; the end guide rod is used to connect all the guide rods in the groove. The other is a solid structure, using a monolithic homogeneous metal material, which can be divided into a non-magnetic secondary side and a steel secondary side. The non-magnetic secondary side has good electrical conductivity and is generally copper or aluminum.
The flat linear induction electric motor shown is rolled into a cylindrical shape in the direction perpendicular to the linear motion, forming a cylindrical linear induction electric motor, an evolution of the cylindrical linear induction electric motor shown). In special occasions, the electric motor can also be made into a rotary linear electric motor with both rotary motion and linear motion. The moving body that rotates linearly may be the primary side or the secondary side.
Disc-type linear induction electric motor, the secondary side is made into a flat disc, which can rotate freely around the axis passing through the center of the circle: put the primary side on the disc on the upper side of the secondary outer edge plane, so that the disc is under the action of tangential force rotate. However, its working principle and design method are the same as those of flat linear induction electric motors, which still belong to the category of linear electric motors. Compared with ordinary rotating electrical machines, it has the following advantages:
a) Torque and rotational speed can be adjusted by multiple primary side combinations or by the radial position of the primary side on the disc.
b) The lower speed can be obtained without going through the gear reduction box, so the vibration and noise of the electric motor are small.
Hangzhou New Hengli Electric Machine MFG. Co., Ltd. (Originally Hangzhou Hengli Electric Machine MFG. Co., Ltd.) was founded in 1954.