When using the inverter, why is the motor temperature rise higher than the power frequency?
Because the output waveform of the inverter is not a sine wave, but a malformed wave, the motor current at rated torque is about 10% more than the power frequency, so the temperature rise is slightly higher than the power frequency.
Another point: when the motor speed is reduced, the motor cooling fan speed is not enough, the motor temperature rise will be higher.
17. What is the meaning of the motor's degree of protection?
For example, the motor of IP23 means that the motor can prevent the intrusion of solid objects larger than 12 mm, and prevent human fingers from coming into contact with internal parts to prevent intrusion of medium-sized (12 mm in diameter) foreign objects. It is possible to prevent intrusion of sprayed water or to prevent damage from entering water sprayed in a direction with a vertical angle of less than 60 degrees.
The IP (INTERNATIONAL PROTECTION) protection level system was drafted by IEC (INTERNATIONALELECTROTECHNICALCOMMISSION). The motor is classified according to its dustproof and moisture-proof characteristics. The foreign objects referred to here include tools, human fingers, etc., which are not accessible to the live parts of the motor to avoid electric shock. The IP protection level consists of two numbers. The first number indicates the level of the motor from dust and foreign objects. The second number indicates the degree of airtightness of the motor against moisture and water intrusion. The larger the number, the higher the degree of protection. The higher.
If you want to buy a food processing machine, please pay attention to fast speed blender motor.
