Series-excited motor

Abstract

The invention provides a series-excited motor, which belongs to the technical field of mechanisms and solves the problems of the carbon brush of a conventional series-excited motor, including low operation stability and short service life. The series-excited motor comprises a rotating shaft, a carbon brush, a rotor, a stator and a commutator, as well as a front end cover and a rear end cover, wherein the rotor, the stator and the commutator are sleeved on the rotating shaft; a front bearing sleeve and a rear bearing sleeve are fixedly connected to the inner sides of the front and the rear end covers respectively; bearings are respectively mounted between the front bearing sleeve and the front end cover, as well as between the rear bearing sleeve and the rear end cover; the carbon brush consists of two carbon brush components, each of the carbon brush components is composed of a carbon brush base, a carbon brush head, a copper insertion piece and a lead-out wire; carbon brush mounting holes are respectively formed on the two sides of the rear end cover; carbon brush head mounting holes are formed on the carbon brush bases; the carbon brush heads are inserted into the carbon brush head mounting holes; the copper insertion pieces are clamped at the outer ends of the carbon brush bases via clamping structures; and springs are arranged between the copper insertion pieces and the carbon brush heads. The series-excited motor has the advantages of stability in operation, long service life, convenience in mounting and dismounting, and durability.

Description

technical field [0001] The invention belongs to the technical field of machinery and relates to a series excitation motor. Background technique [0002] A motor is an electromagnetic device that converts or transmits electrical energy according to the law of electromagnetic induction. Motor products can be divided into two categories based on whether the rotor has an excitation power supply: one is an induction motor without an excitation power supply for the rotor, and the induction motor cuts the closed loop coil of the rotor through the rotating induced magnetic field generated by the excitation winding of the stator to drive the rotor to rotate; the other One type is a motor with an excitation power supply for the rotor, such as a series-excited motor. The excitation power supply of the rotor needs a commutator to realize the continuous rotation of the rotor by switching the current direction in the rotor coil when the rotor rotates. [0003] The series-wound motor belo...

AI Technical Summary

Problems solved by technology

[0004] The carbon brush in the existing series-excited motor includes a carbon brush holder, a carbon brush head and a copper insert, and the lead wire is welded on the copper insert to realize the electrical connection between the copper insert and the lead wire, and the copper insert is fixed with glue. On the end face of the carbon brush holder, the carbon brush head and the copper insert are connected by a spring. The existing problem is that after a long working time, the copper insert is easy to detach from the carbon brush holder, so the spring will contact the copper insert and the copper insert. The carbon brush head is separated, so that the copper insert and the carbon brush head are separated from each other, so that the carbon brush cannot work normally

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