Along with social progress and development, mechanization in production and life are widely used. Bearing as an indispensable part of the machinery, the scope of its use will become more and more widely because of the rotation to be used in the bearing. Mainly from the support and reduce friction bearings in machinery, so the accuracy of the bearing noise, are all directly related to the use and life of the machine. But business people are always often met with a number of customers that use th

In AC circuits, the cosine of the phase difference between the voltage and current (phi) is called power factor, with symbolic power factor means that, numerically, the power factor is the ratio of active power and apparent power, cosΦ = P / SThe power factor of the size and nature of the load circuit, such as incandescent bulbs, power factor of 1 of the resistive load resistance furnace, generally having inductive or capacitive load circuit power factor less than 1. The power factor is an impo

Asynchronous frequency conversion motor is derived by ordinary induction motor, to adapt to the characteristics of the inverter output power, the motor rotor groove, insulation technology, electromagnetic design check, made a lot of changes, especially the ventilation of the motor cooling, it is in the general case plus an independent forced cooling fan, to adapt the cooling efficiency when the motor is running at low speed and to reduce the motor running at high speed when the wind abrasion. Th

(A) the supply voltage is too high 1 when the supply voltage is too high, the motor counter electromotive force, the magnetic flux and the magnetic flux density increases. Due to the size of the iron loss and magnetic flux density is proportional to the square of the iron loss increases, resulting in overheating of the core. While the magnetic flux increases, but also increased dramatically, resulting in the excitation current component caused by the copper loss of the stator winding increases,

The silicon steel sheet is a low carbon ferro-silicon soft magnetic alloy, ships silicon content of 0.5 to 4.5%. Silicon added to improve the resistivity and the maximum magnetic permeability of the iron, reducing the coercive force, core loss (iron loss) and magnetic aging. It is mainly used to produce all kinds of transformers, motors and generators core. World silicon steel production accounted for about 1% of the total steel. Sheet Steel: low iron loss, which is the most important indicator

Three-phase induction motor rotor speed is lower than the speed of the rotating magnetic field, the rotor winding there is relative motion between the magnetic field induced emf and current and the magnetic field generated by the interaction of electromagnetic torque, and energy conversion. Compared with the single-phase induction motor, three-phase asynchronous motor is running good, and save a variety of materials. Different rotor structure, the three-phase asynchronous motors can be divided i

The yaw system of the wind turbine is also known as a means of wind, and its role in that when the wind velocity vector direction changes, it is possible to quickly and smoothly aligned with the wind, so that the maximum wind wind wheel. Common Rudder small micro-wind turbine wind, it is mainly composed of two parts, one tail, mounted on the tail boom and rotor shaft parallel or angled. In order to avoid the influence of the wake flow, also may be upturned tail, mounted in a higher position. Sma

National standards (code GB): General requirements and technical requirements; motor GB755-65 motor basic technical requirements: the requirements of all types of motor technology, nameplates, line-side flag; GB760-65 motor mounting dimensions and dimensions of the Code require the installation of all types of motor and shape size Code. Ministerial standard (Code JB): The technical requirements of the particular type of motor rated data, conditions of use; JB742-66 J2 the JO2 series three-pha

Winding short-circuit consist primarily of inter-turn short circuit, coil and coil short circuit, the electrode group a short circuit, phase-to-phase short-circuit. Winding short-circuit fault causes and treatment: Reasons: 1, improper embedded line, magnet wire film damage. 2 winding is damp, the motor power supply voltage is insulation breakdown. 3, long-term overload current exceeds the rated current, the insulation aging, loses its insulating effect. 4, white or interlayer insulation pad.

1, Y, Y2, YPT, YB, a series of small motors. YZ, YZR Series Crane and Metallurgical motor. 3, JS, JR, JR2, frame size. 4, Y, YR YKK, YRKK, frame size 355-800,380 V, 60KV 10KV various types of large and medium-sized high and low motor. 5, Z2, Z3, Z4, ZZJ, ZZY, ZYZ, and derived series DC motor. 6, SF, SFW, TF, ZYS generator. Y series full of totally enclosed fan-cooled three-phase squirrel cage induction motor. The use is very common. YS series three-phase asynchronous motor, less power for