How do you choose a motor?
There are several characteristics that you need pay attention to when selecting a motor but voltage, current, torque, and velocity (RPM) are most important. Current is what powers the motor and too much current will damage the motor. For DC motors, operating and stall current are important.
What are the factors to be considered while selecting the size and rating of motors used as a drive?
Size and rating of the motor:
Whether the motor is to run continuously intermittently or on load cycle. Whether overload capacity and pull torque are sufficient.
What are the factors governing the selection of motor power rating?
Continuous duty and variable load
the duty cycle is closely related to temperature and is generally taken to include the environmental factors also. v The rating of a machine can be determined from heating considerations. v However the motor so selected should be checked for its overload capacity and starting torque.
What are the mechanical considerations for selection of motor?
Running Characteristics: The torque speed characteristic of the motor should match that of the load. The running losses, power factor and magnetising current should have reasonable values. The pull-out torque of the motor should cater to the maximum load torque.
Which motor is constant speed?
A DC motor can be referred to as a constant speed motor because it can self- regulate its speed.
What are the criteria for selecting a motor for particular operation?
10 things to consider when choosing an electric motor
- Vehicle characteristics. …
- Driving cycles. …
- Vehicle configuration (electric, hybrid) …
- Maximal speed. …
- Maximal torque. …
- Maximal power. …
- Battery Capacity. …
- Battery Voltage.
Which motor is best for EV?
Induction motors are the preferred choice for performance oriented electric vehicles due to its cheap cost. The other advantage is that it can withstand rugged environmental conditions. Due to these advantages, the Indian railways has started replacing its DC motors with AC induction motors.
How do you select a motor for a particular application?
A constant or variable torque and horsepower will be required for the industrial motor depending on the type of load the motor is driving. The size of the load, the required speed, and acceleration/deceleration—particularly if it’s fast and/or frequent—will define the torque and horsepower that is required.
What does power factor indicate?
Power factor is an indication of the relative phase of the power line voltage and the power line current. A power factor of 1 indicates that the voltage and current are in phase and have a low-harmonic content. A power factor of 0 indicates that the voltage and current are 90-degrees out of phase.
What happens decreased power factor?
A lower power factor causes a higher current flow for a given load. As the line current increases, the voltage drop in the conductor increases, resulting in a lower voltage at the equipment. With an improved power factor, the voltage drop in the conductor is reduced, improving the voltage at the equipment.
What are the different classifications of load and how they affect the motor selection?
The three main electric motor load types are: Variable-torque loads – eg fans and pumps where the speed varies. With this type of load, reducing the speed of the motor by even a small amount can save a lot of energy. Constant-torque loads – eg conveyors, screw and reciprocating compressors, and crushers.
Which motor is suitable for machine tools?
Common Types of Motors used in CNC Machines
The two motors most often used in CNC machine tools are stepper motors and servo motors. Both work to convert a non-linear input from the control into linear movement at the spindle shaft and table by turning a screw-like shaft to move the load.
Which motor is used in machine tools?
One or more electric motors driving the operative members of the machine tool make up the machine’s essential components. The great majority of machine tools are driven by alternating-current three-phase induction motors. These motors are simple, reliable and inexpensive.