Motor noise generated in different ways, can be broadly divided into electromagnetic noise, mechanical noise and aerodynamic noise. Determine the various categories of noise of an electric motor, usually requires a combination of several methods to achieve. Analysis of the mechanical noise of the motor used to cut off the power supply method, the noise generated by the motor by the inertia continue to operate after power outage for the main part of the mechanical noise; electromagnetic noise ch

All grid-connected wind generator through a three-phase alternating current (AC) motor mechanical energy is converted into electrical energy. The generator is divided into two main types. Frequency synchronous generator operation and it is connected to exactly the same frequency of the grid, the synchronous generator is also known as an alternator. Asynchronous generator running frequency is slightly higher than the grid frequency, the asynchronous generator often referred to as induction genera

All motors (including high-voltage motors) to go through the type testing and performance testing at the factory prior to fully meet the technical requirements in order to put into operation or continue production. The data of these tests or trials include motor voltage, current, speed, power, slip frequency, efficiency, temperature, resistance, etc. These parameters are to meet the accuracy of the relevant national standards GB1032-phase asynchronous motor test methods safety requirements based

Permanent magnet generator is a the ordinary synchronous generator rotor change permanent magnet generator structure, commonly used permanent magnet materials ferrite (BaFeO), samarium cobalt 5 (SmCo) permanent magnet generator for general use small wind turbine. Asynchronous generator asynchronous motor is in the working state of power generation, grid power excitation power (excited) and shunt capacitance of self-excitation power (self-motivation) two cases from the incentives. First. The MAI

First, what is the CE mark? In recent years, the European Economic Area (the European Union, the European Free Trade Association member countries, except Switzerland) the goods on the market, CE mark to use more and more, the CE mark affixed to goods that meet the safety, health, environmental and consumer protection, and a series of European directives to express requirements. Second, the letters CE mean? In the past, European countries on the import and sale of products requirements vary ac

Thin strips: a cross-section of this guidance bar thinner. Causes of centrifuge speed is too high, the centrifugal force is too large, resulting in the groove bottom guide bar did not cast full (short-selling); core wrong piece, slot slash is not a straight line, impede the flow of molten aluminum; core preheating temperature is low, excessive temperature drop of the liquid aluminum, the fluidity deteriorates. Centrifuge speed is too low poured dissatisfaction with the cold compartment: Cause l

The VVVF motor generally choose four motor base frequency and dot design in the 50-100Hz 50Hz 0-50Hz (speed 0-1480r/min) motor for constant torque operation, the frequency (speed 1480-2800r/min ) within the scope of the motor for constant power operation, the entire speed range (0-2800r/min) basically meet the general requirements of the driven equipment, the operating characteristics of the DC drive motor, speed smooth. If constant torque machine, but the volume of the motor is relatively large

A general assessment of the quality of motor in addition to the characteristics of the operation to the five senses to judge more motor vibration motor vibration noise situation. Motor vibration motor vibration and noise generated by the motor, are: 1, the mechanical motor vibration motor vibration and noise, the weight of the rotor unbalance, resulting in a considerable number of revolutions of the motor vibration. 2, the rotation of the motor shaft bearing, the normal situation is generated

Firstly, Causes and countermeasures of the mechanical vibration motor rotor unbalance motor vibration A Cause: manufacturing residual imbalance. Long period of operation to produce a lot of dust adhesion. Operation caused by thermal stress axis bending. Accessories thermal displacement of the rotor caused by unbalanced load. Deformation caused by the centrifugal force of the rotor accessories or eccentric. Caused by external force (belt, gear, Direct bad) shaft bending. Poor bearing device (axis

First, steady rise of the motor during normal operation should not exceed the allowable limit, the run should always pay attention to monitor the temperature rise for each part. Second, monitoring the motor load current. The motor failure Metropolitan nail Current surge, causing the motor heat. The larger power motor should be fitted with the ammeter monitors the load current of the motor. The load current of the motor should not exceed the nameplate rated current value, or to identify the caus