We can find needed power of the electrical motor

.

1.4. Select the electrical motor

For given mechanical drives we will use asynchronous electrical motor. It is explained by the fact that in comparison with the other types of motors asynchronous electrical motors are simpler in design and maintenance, more reliable and less expensive. The most widely spread asynchronous motors are series 4A squirrel cage induction motors.

Asynchronous motors are chosen by means of table 1.2 depending on the input power P_inp of a mechanical drive and the synchronous rotational speed n_s (rotational speed of a magnetic field that characterizes operation of the motor without load). For given mechanical drives asynchronous motors are used either synchronous rotational speed n_s = 1500 rpm or n_s = 1000 rpm.

Table 1.2.