The motor noises nothing more than for two reasons: mechanical and electrical. 1 mechanical Such as damage or scratch the motor cooling fan motor housing, motor fixed unstable. The situation in this regard is a good deal, if I could find the source of the noise, generally a good deal. 2 electrical (1) the carrier frequency of the inverter is set too low Appropriate carrier frequency is set higher, but this time will cause some problems if the carrier frequency is so high that they cause int

Practice has proved that, combined with the needs of users in the design of the motor protection (motor protection) should meet the following requirements: 1, using the current sampling This will not only take into account the different characteristics of the flow and phase failure protection, but also fully reflect no matter where phase failure should be reflected in the fact that in the current of the power supply line; avoid the shortcomings and limitations of the sampling program. Use of v

Currently, the EU approved the use of the CE mark certification mode has the following eight:Module A (internal production control):1. For simple, high-volume, non-hazardous products, only the application of European standards of production manufacturers.2. Qualified facility self-assessment, self-declaration.3. Technical documents submitted to the national institutions than ten years, and on this basis, can review and inspection to determine whether the product complies with Directive, producer

Explosion-proof motor explosion-proof principle can be divided into flameproof motors, increased safety motors, positive pressure motor, no spark motor and dust explosion-proof motor. This paper describes the five categories of motor product line and its characteristics, YB2 series flameproof three phase asynchronous motor will replace the YB series three-phase asynchronous motor YA2 series increased safety will replace the YA series, also introduced TAKW4000 of- / 2600 4000kW increased safety b

First, the operation of technical points 1, demolition asynchronous motor (1) before removing the motor must be removed, the connection of the motor and the external electrical connection, and good phase marker. (2) removal procedure a pulley or coupling; b, the front bearing outer cover; c, the front cover; d hood; e fan; f rear bearing cover; g rear end cover; removal of the rotor; i The front bearing; j front bearing cover; k, the rear bearing; l rear bearing cover. (3) the demolition of

1 A rotor core diameter size is too small or the stator core diameter size is too large, and the stator, the rotor core axial offset the low magnetic properties of electrical steel sheet, will result in no-load current increases, the power factor is reduced. 2 stator, the rotor core press-fit of poor quality, the net core length, caused by the no-load current and iron loss increases, power factor and efficiency. 3 The chute of the rotor 3 is too large, The rotor cores stacked unevenness, the n

Cage motor decompression start-up mode with a star - delta starter, auto start under reduced pressure, the reactor start. These start-up mode are all level decompression hard start, there are obvious shortcomings, that you start the process of secondary impacts current. Soft-start with the traditional decompression start-up mode with the following differences. 1.1 no impact on current Soft starter when starting the motor, by gradually increasing the thyristor conduction angle, the motor starti

The servo motor, also known as the motor in the automatic control system, for the implementation of components of the received electrical signal into an angular displacement or angular velocity of the output of the motor shaft. Divided into two major categories of DC and AC servo motor, its main feature is that when the signal voltage is zero, no rotation, speed and uniform decline with increasing torque. Inside of the servo motor rotor is a permanent magnet, the drive control of the U / V / W

Blowing in the wind, the wind wheel rotation by wind thrust, when the speed reaches a certain level, the generator start generating electricity (generation only effective power generation, will begin charging), with the changes in the size of the wind power generation will respond to changes, our wind turbine design standards started about an average of 2.5 m / s, 9M / S to reach the rated power, began to control the motor running about about 13-15M / S, our wind turbine rated power 300W maximum

1. see: daily inspections to see the motor, the current size and changes, look around there are no leaks, dripping, it will cause the motor insulation low breakdown and burn. Depends on whether the motor peripheral influential objects of ventilation environment? See the fan cover, the need to clean the outside of the blades and the motor is too dirty? To ensure that its cooling fin effect. 2.Listen: listen carefully to the operation of the motor sound is abnormal, by means of a screwdriver or l