technology small production motor experimental material diy technology small production self-made primary school science experimental equipment 科技小制作电动机实验材料diy 科技小制作自制小学科学实验器材

Product Name: Simulated Motor

Item No.:K0558

Package: Packaging bag

Product dimensions: 110*60*85 MM

Number of boxes to be packed: 400 PCS

Box Size: 600*400*550 MM

                                                       Batteries to be provided by the user

                                             Courseware for Simulated Motor Course

The structure of an artificial motor is divided into two parts: the stator and the rotor. Note: do not confuse the commutation poles with the commutator; remember their respective functions. The stator includes: main magnetic poles, frame, commutation poles, brush assembly, etc. The rotor includes: armature core, armature winding, commutator, shaft, and fan, etc. 2. Excitation methods of DC motors The performance of a DC motor is closely related to its excitation method. Generally, there are four types of excitation methods for DC motors: DC separately excited motor, DC series excited motor, DC shunt excited motor, and DC compound excited motor. Understand the characteristics of each method: DC separately excited motor: There is no electrical connection between the excitation winding and the armature; the excitation circuit is supplied by another DC power source. Therefore, the excitation current is not affected by the armature terminal voltage or armature current. DC series excited motor: The voltage at both ends of the series excited winding is the same as that at the armature, but the excitation winding is wound with thin wires and has many turns, resulting in a higher resistance, which reduces the excitation current through it. DC shunt excited motor: The excitation winding is connected in series with the armature, so the magnetic field in this motor changes significantly with changes in armature current. To avoid large losses and voltage drops in the excitation winding, the smaller the resistance of the excitation winding, the better. Therefore, DC shunt excited motors are usually wound with thicker wires and have fewer turns. DC compound excited motor: The magnetic flux of the motor is generated by the excitation currents in both windings.

Experimental objectives: 1. Understand the structure of an electric motor – an electric motor is a rotating electromagnetic machine that operates based on the principle of electromagnetic induction. It is used to convert electrical energy into mechanical energy. During operation, it absorbs electrical power from the electrical system and outputs mechanical power to the mechanical system.

Experimental Cognition:
Battery case: As the name suggests, it is a case for fixing batteries, serving as a battery power output device

Wire Ring: After power is applied, an induced electromotive force and induced current are generated in the rotor winding. The induced current experiences a force in the magnetic field. The direction of the force on the rotor current is the same as the direction of the rotating magnetic field. This is caused by the flux through the air gap and the rotor current.
The magnetic torque is what is known as the electromagnetic torque of an electric motor. Under electromagnetic torque drive, the rotor of the electric motor rotates in the direction of the rotating magnetic field.

Magnet: Magnets were not invented by humans; they are natural magnetite. The ancient Greeks and Chinese discovered a naturally magnetized stone in nature, which they called “magnetic iron stone”. This stone could magically attract small pieces of metal.
iron pieces, and after random swinging, they always point in the same direction. Early sailors used this type of magnet as their earliest compass to determine direction at sea. It was likely those who first discovered and used magnets...
The compass, which is known as "guanlianzhen," is one of the four great inventions of China.

Experimental procedures:
1. Experimental preparation: Identify experimental equipment: wires, coils, battery box, wooden base plate, supports,

Experiment Report:
The electric motor uses the positive and negative pole characteristics of electromagnetic force to rotate the stator. Students can build an electric motor themselves to understand its basic principles.