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Differences between NEMA motor DESIGN ABCD
Type A: Regular starting torque (usually 150-170% of rated), corresponding to high starting current. The ultimate torque is the highest of all NEMA types. Can handle heavy loads in a short time. The slip is less than or equal to 5%. A typical application is the motor of injection molding machinery.&Read more -
Why do high-voltage motors use a three-bearing structure?
As a high-power device, the design and configuration of the bearing system of a high-voltage motor is crucial to ensure the stable operation, load-bearing capacity and life of the motor. The design of the bearing structure is carefully planned based on these requirements.The following is a detRead more -
Failure phenomena and causes of DC motors
As an important type of motor, DC motors are widely used in various fields. It is often used to drive industrial plants, automobiles, ships, aircraft, etc., and is an indispensable part of modern social production and life. However, like any machine, DC motors may also cause failures, resulting in dRead more -
Motor phase failure case analysis
Characteristics of motor phase lossThe specific manifestations of motor phase loss are increased vibration, abnormal noise, increased temperature, decreased speed, increased current, strong humming sound when starting and inability to start. The cause of motor phase loss is the power supply itself oRead more -
Principle and usage of motor shaft current measuring instrument
The principle of the motor shaft current meter is to use the Hall effect to detect the current of the motor shaft. The Hall effect is an electrical effect based on a magnetic field. It can convert the change of the magnetic field into a voltage signal to achieve the measurement of the current. The mRead more -
Manufacturing and working principle of fan motor rotor
1. Manufacturing of fan motor rotorsThe manufacturing of fan motor rotors requires multiple steps, including design, casting, machining and assembly.1. DesignFirst, design is required to determine the size, material, shape and other parameters of the rotor. The design must take into account the useRead more -
How to eliminate the grounding fault of the motor winding
To eliminate the grounding fault of the motor windingFirst, observe the damage of the winding. Except for the insulation that has aged and become brittle, it can be repaired locally.If the grounding point is at the outlet of the notch or the bottom of the slot coil, and only one wire is damaged, theRead more -
Common causes of abnormal noise in motor bearings
Common causes of abnormal noise in bearings:1. Impurities such as sand or carbon particles are mixed into the bearing, acting as abrasives;2. Impurities such as water, acids or paint are mixed into the bearing, acting as corrosives;3. The clearance of the bearing is too small (improper matching);4.Read more