discount dc gear motor classification and structure
The discount dc gear motor is a DC motor with special purpose in the automatic control system. Its structure is essentially different from that of a general DC motor. It is also composed of two parts: the stator and the rotor.
The role of the stator is to establish a constant magnetic field with a field winding on the stator pole. In the DC deceleration system, electromagnetic and permanent magnet DC geared motors are commonly used. At present, the electromagnetic excitation mode is the other excitation mode, and the armature and the excitation winding are powered by two independent power sources.
The hollow cup armature permanent magnet DC gear motor is rotated by an outer stator and an inner stator, and the hollow cup armature rotates in the air gap between the inner and outer stators. The outer stator is made of a soft magnetic material, and the core is provided with concentrated windings (two semicircular magnetic poles are formed by magnets or N and S poles are magnetized on the annular magnetic steel). The inner stator is made of a cylindrical soft magnetic material which acts as part of the magnetic circuit to reduce the magnetic reluctance. The armature is a hollow cup-shaped cylinder made of a non-magnetic material such as plastic, which is mounted directly on the motor shaft. The hollow cups are arranged in a hollow cup shape along the circumference of the hollow cup and the molded windings are cured with epoxy resin. The power supply is applied to the armature windings via brushes and diverters. Generally, the length and diameter of the armature core of the DC deceleration motor are larger than that of the ordinary DC motor, and the purpose is to reduce the flywheel moment and improve the response speed.
In recent years, with the development of technology, a new type of discount dc gear motor, such as a brushless DC geared motor, has been produced.
