(1) The temperature rise of the motor during normal operation should not exceed the permissible limits should always pay attention to the run to monitor the temperature rise for each part. (2) monitoring the motor load current. Motor failure, the Metropolitan of the stator current surge, the motor from overheating. The larger power motor should be fitted with the ammeter monitors the load current of the motor. The motor load should not exceed the nameplate rated current value, or to identify th

The motor energy efficiency standards turnover, national standards are not uniform, most of the countries relevant IEC standards, now some of the basics of efficient motor summarized Share: 1 EFF1 and EFF2 energy efficiency: The motor energy efficiency the of EFF1 EFF2 on EU motor energy efficiency rating: In 1999, the EU and the European motor and power electronics manufacturers Association (CEMEP) developed motor energy efficiency standards (EU-the CEMEP protocol). EU-CEMEP the products cove

Sampling is a sampling plan in accordance with the provisions randomly from the batch or process a small sample of individuals (as a sample) tests performed in accordance with the results of the sample test to determine a number or a process can be accepted. Sampling: Verify that the object is a number of products, product batch application of statistical theory to infer based on the sampling results received or not. But still test receive lots may contain non-conforming product, does not receiv

The common motor burned, there are three: phase loss, overload, short-circuit. (1) missing: open the motor to see the burning part of the winding distribution of very regular, symmetrical distribution, burning two-phase star connection, delta connection burn phase. Such a situation is not a quality problem. (2) Overload: open motor observation, the entire winding line package color darker black ends of straps crack, serious and white and notch insulation due to overheating and melting take the

Shred bars：there are some causes， such as high speed centrifuge,large centrifugal,so that the groove bottom is not casted fully,there are some wrong rotor plate in core,so that which prevent aluminum fluid flowing, Core preheat temperature is low, Temperature of molten aluminum drop too much, liquidity deteriorated. Dissatisfaction and Condensation: it is caused by The low temperature of molten aluminum, Poor liquidity, Casting speed is too slow or flow, the core and mould preheating temperat

According to the different ways of electrical noise, can be divided roughly electromagnetic noise, mechanical noise and air dynamic noise. Judge various kinds of noise from a motor, usually takes on some methods to achieve. Using the method of cut off power supply to analyze mechanical noisenoise,After outage motor continue running through the noise produced for the main part of the mechanical noise；According to the characteristic of electromagnetic noise change with the current，Judging by cha

First of all,What is the meaning of the CE mark? In recent years, European economic zone, （the European economic 、European free trade association member, except Switzerland) CE mark is used more and more in the commodity market，The goods with CE mark that meet the safety, health, environmental protection and consumer protection and so on a series of European directives must express requirements The second, what does the letter CE represent? In the past, The requirements for European Union

Inverter is mainly constituted by Rectifier（AC Variable DC）、 filtering、Re-rectification（DC Variable AC）、Braking Unit.、driving unit，Detection unit as well as microprocessing unit. Why is the motor rotation speed can be freely changed?Motor rotation speed unit：r/min the number of rotations per minute，it can be expressed as rpm. Example 2 poles motor 50Hz 3000 [r/min] 4 poles motor 50Hz 1500 [r/min] Conclusion：The motor rotation speed is proportional to the frequency. AC Induct

In short, three-phase asynchronous motor stator and rotor mainly by the two major components, while the air gap between stator and rotor is generally 0.25 ~ 2mm, because the gap is also a part of the motor magnetic circuit, when the gap is large, reluctance on the big, exciting current is also large, so the air gap can not be too large, while the smaller the process more difficult, but also easy to wipe Heart. A stator part. Stator: the motor fixed and called the static part of the stator. It