light industry

Analysis of electric drive system of slip motor
1, electric energy waste is serious. Electromagnetic speed regulating motor is a branch of constant torque stepless speed regulation motor. The motor is composed of an ordinary squirrel cage asynchronous motor, an electromagnetic rotary clutch, a speed measuring motor and a control device which is controlled by the motor and the control device. The motor as drive for 0 thick motivation, electromagnetic slip clutch as the torque transmitter, the motor output torque to the load side.
The electromagnetic slip clutch is composed of two basic parts:
(1) armature (rotor)
(2) magnetic pole and field coil force (driven rotor). The armature speed is constant, the armature is connected with the driven rotor through the magnetic coupling, and the driven rotor is driven to rotate, and the excitation current of the electromagnetic rotary differential clutch is changed to adjust the speed of the driven rotor. Magnetic coupling loss and eddy current loss, easy to heat and electric energy waste is serious, Chenhui chemical building materials Co., Ltd. has two extruding machines a 22KW electromagnetic speed regulating machine; a 22KW ordinary machine buckle machine VVVF, under the same conditions, electromagnetic speed regulating motor energy consumption 30% above. Greatly increased production costs.
2, the characteristics of the electromagnetic induction motor is soft, although there is speed, but the speed is not stable, greatly affect the quality of products.
3. Electromagnetic speed regulating motor is complex in structure and high in heat, which is a great influence on the production and maintenance and production environment.
Two, variable transmission system with the advantages of frequency converter:
Frequency converter in the range of speed regulation, starting characteristics, dynamic response, adjustment accuracy, output characteristics, economic indicators and the operation and monitoring of all aspects of convenience, are better than the electromagnetic speed. In addition, the variable frequency speed regulation also has the advantages of perfect protection functions, universality, small amount of maintenance, safe and reliable operation, small power consumption, equipment life long. From zero to start a smooth start and speed, and can choose to speed and speed down the curve, energy saving is significant, won the operator and maintenance personnel.
Three, the use of frequency converter efficiency analysis:
According to the actual situation, it can be known that the inverter can achieve 30% of the energy-saving effect of power saving, with a 37KW slip motor as an example 37 (KW) x 24 (H) x 12 (x) x 30%=95904KW
According to the 0.5 generation of electricity per kilowatt hour, can save electricity:
95904 * 0.5 = 47952 yuan
Four, equipment investment:
37KW converter ECF100-T3-37KW
37KW with a general asynchronous motor