Motor (Motor) is a device that converts electrical energy into mechanical energy.It uses a rotating magnetic field to generate rotation magnetic fields and acts on a rotor (such as a mouse cage closed aluminum frame) to form a magnetic power rotation torque.The motor is divided into DC motors and AC motors according to different use of power supply. Most of the motors in the electric power system are AC motors, which can be a synchronous motor or asynchronous motor (motor stator magnetic field speed and rotor rotation speed do not maintain synchronization speed).
Motor price
Motor repair
When the maintenance technique is running or faulty, it can prevent and eliminate the fault in time by watching, listening, smelling, and touching four methods to ensure the safe operation of the motor.First, see if there are abnormalities in the operation of the motor, the main manifestations are the following situations.1. When the stator winding is short circuit, the motor may be smoked.2. When the motor is severely overloaded or running, the speed will slow down and have a heavy buzz.3. The motor runs normally, but when it is stopped suddenly, you will see the phenomenon of the wiring loosening; the fuse is broken or a certain part is stuck.4. If the motor is vibrating violently, it may be that the transmission device is stuck or the motor is fixed, and the bottom feet bolt loose.5. If there are discoloration, marks and smoke traces in the contact point and connection in the motor, it means that there may be local overheating, poor contact at the conductor connection, or burnout of the winding.
Motor model
Electric models are a codes cited for business names, specifications, and types of product names, specifications, and types in the technical documents.The product code is composed of four sequential sections: motor type code, motor characteristics code, design serial number and excitation code code.1. Type code is a Chinese Pinyin letter used in the various types of the motor.For example: asynchronous motor Y synchronous motor T synchronous generator TF DC motor z DC motor ZF2, the feature code is the performance, structure, or use of the characteristics of the motor, and it is also represented by Chinese Pinyin letters.For example: Betting of the explosion -barrier type B indicates that the YB axis circulation fan is used by YT electromagnetic brake YEJ frequency conversion speed adjustment YVP variable multi -speed YD crane use of YZD, etc.
Electrical motor front and reverse wiring diagram
In order to enable the motor to be transferred and reversed, the two contactors KM1 and KM2 can be used to replace the phase sequence of the three -phase power supply of the motor, but the two contactors cannot be sucked.To prevent this accident, reliable interoperability should be adopted in the circuit. The following figure shows the control path that uses the two -way motor that uses the buttons and the contactor.The line analysis is as follows: 1. Positive startup: 1. Combine the air switch QF to connect the three -phase power supply 2. Press the positive start button SB3, KM1 power -on -power combined self -lock, the main contact is closed to connect the motor, the motor is at this time at this timeThe phase sequence is L1, L2, L3, that is, it runs forward.
The working principle of the motor
First, the working principle of the DC motor is the magnetic field, and the conductor moves in the magnetic field; the AC motor is a magnetic field rotation motion, and the conductor does not move.1. The working principle of general DC motors is divided into stator winding and rotor winding.The stator winding generates a magnetic field. When DC power is powered, the stator winding generates a fixed polar magnetic field.The rotor is stressed in the magnetic field, so the rotor rotates in the magnetic field. The DC mechanism is complicated and the cost is high.2. The working principle of the brushless DC motor When the built -in Huo Er sensor is connected to the power supply, these Huo ear sensors enter the signal into the controller, (in fact, these signals indirectly reflect the position where the rotor is located) The controller is over these signals.After the judgment, the corresponding output was made, and the corresponding coil was powered on, and the magnetic field was generated.Because of the principle of homosexuality, the principle of the opposite sex wants to suck, the stator and rotor are relatively moving.

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