Motor under normal working state can noe how many degrees?

Motor is a common electric equipment, a lot of mechanical equipment running motor, chemical anti-corrosion water pump, mixer, industrial equipment basic cannot leave the motor, some use occasions, the cause of motor have different using conditions, the motor in normal work, able to use under much more high temperature? Some of the motor are rated, the insulation of the motor rating refers to their level of heat insulation materials used, points A, E, B, F, H. Allow temperature refers to the temperature of the motor and temperature higher than the limits of the surrounding environment. Temperature rise is refers to the motor in the rated operating condition, the temperature of the stator winding higher environmental temperature value ( The environment temperature of 35 ℃ or below 40 ℃, if the brand of the concrete numerical value, not for 40 ℃) Temperature rating of the insulation class A E B F class H high allowed temperature ( ℃) 105 120 130 155 180 winding temperature rise limit ( K） Reference temperature (60, 75, 80, 100, 125 performance ℃) 80 95 100 120 145 in generators and other electrical equipment, insulation materials is the most weak link. Insulating materials are especially vulnerable to the effects of high temperature and accelerated aging and damage. Different heat insulating materials have the difference, using different insulation of electrical equipment for its ability to tolerate high temperature is different. So the general electrical equipment are the work of the high temperature. People according to the ability of different insulating material resistant to high temperature of its rules on the 7 allows high temperature, according to the temperature size are: Y, A, E, B, F, H and C. They allowed working temperature: 90, 105, 120, 130, 155, 180 and above 180 ℃. Therefore, class B insulation of the generator by the insulation of the heat temperature is 130 ℃. Users in generator work should promise not to make generator insulation materials more than the temperature can guarantee the normal work of the generator. Insulation class for class B insulation materials, mainly by mica, asbestos, glass wool by organic adhesive agglutination or dipping into a chance fever, what causes electricity? This is a process of how? Motor load the runtime contains power loss, will eventually be into heat energy, which can make the motor temperature rise, more than the ambient temperature. The value of the motor temperature higher than the environment temperature is called heat up. Once the warming, the motor will be around to heat; The higher the temperature, the faster cooling. When the heat emitted by motor unit time is equal to the heat generated when the motor temperature no longer increases, and maintained a stable temperature, which is in a state of heating and heat balance. Second, the general click allow temperature is how many? The rise of temperature of the motor which part of the great influence on the motor? What is defined? Motor load is running, starting from the play its role as far as possible, the load that the output power is larger, the better ( Were it not for mechanical strength) 。 But the greater the power output, the greater the loss power, the higher the temperature. As we know, the motor heat resistance is weak is insulation materials, such as enameled wire. There is a limit to insulation and heat-resistant, within the limits, the physical, chemical, mechanical, electrical insulating materials and so on various aspects performance is stable, its work life in general is about 20 years. More than the limit, is dramatically shorten the life of the insulating material, and even burn. The temperature limit, called allows the temperature of the insulating material. Insulating material allows the temperature of the motor is allowed to temperature; The life of the insulating materials, general is the life of the motor. Third, the temperature of the motor should be below 20 degrees Celsius, namely, the temperature of the motor end cover more than the environment temperature should be less than 20 degrees Celsius, but what is the cause of the motor fever for more than 20 degrees Celsius? Fever is the direct cause of motor caused by the large current. Generally may be coil short circuit or open circuit, magnetic steel caused low efficiency of demagnetization or motor, normal is electric captain time large current operation. Four, the general motors in high temperature can normal work? How high the temperature of the motor can afford? If you measure the temperature of the motor cover more than the environment temperature above 25 degrees, suggests that the rise of temperature of the motor is beyond the normal range, general motor temperature rise should be below 20 degrees. General motor coil is made up of enameled wire winding and become, and enameled wire when the temperature higher than 150 degrees because temperature is too high and fall off of the paint film and the coil short circuit. When the temperature of the coil is in 150 degrees above the temperature of the motor shell shown at 100 degrees, so if the based on its shell temperature of the motor is under high temperature is 100 degrees.
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