.1.1 Catalog data and application parameters
For most application requirements a so-called "standard motor", usually an
induction motor, is used. The following information applies to this type of motor
unless indicated otherwise. Induction motors can be used in a wide range of
applications. In order to select a suitable motor in accordance with manufacturer
specifications minimum requirements must be established. The objective is to
establish requirements regarding
• power supply
• electrical and mechanical characteristics of the motor
• operating conditions
• investment, operating and maintenance costs
• service life
• environmental protection and accident protection measures.
Based on these requirements, a suitable motor and appropriate auxiliary devices
can be selected.
Table 4.3.1 Selection factors for motor type and rated power
4.3
Selection factor Motor feature
Torque ⇒ Power
Moment of inertia ⇒ Starting time
Typical load torques ⇒ Motor torque
Design analysis by ⇒ Optimization
- load torque - motor torque
- acceleration torque - starting time
- acceleration time - acceleration capacity
- reversing frequency - motor heating
Operating modes ⇒ Motor heating
Starting conditions ⇒ Torque characteristic
Braking and reversing ⇒ Brake heat
Thermal processes ⇒ Capacity