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Different Types of Motors And Their Use

Added: (Wed Jul 10 2019)

Pressbox (Press Release) - While buying a motor, we mostly ask ourselves which technology or model is better, is it AC or DC but the answer lies on their application and cost dependent.
Below are the types of AC motor:
Synchronous
This type is used for driving equipment at a constant speed since its rotor rotates in a synchronized way with the frequency of the supply current and the speed remains the same under varying loads. Synchronous is used in high precision devices such as robots, instrumentation, machines and process control.
Induction (Asynchronous)
They are the most known type of AC Motors (AC-Motoren), it involves use of electromagnetic induction emanating from the stator magnetic field winding hence producing an electric current in the rotor and hence Torque. Industries prefer using this type because of their load capacity with Single-Phase induction motors being used mainly for a smaller load such as household appliances. While Three-Phase induction motors are used mostly in industrial applications such as compressors, pumps, conveyor systems and lifting gear.
DC Motors
Since they were the first and widely used type of motor, their system costs are less expensive as compared to AC systems for low power units. However, with their higher power the cost of maintenance increased and is necessary to be taken into consideration.
Their speed can be controlled by looking at the difference between the supply voltages, and are available in a wide range of voltages. The most common known type is 12 & 24V. Some of their advantages include:
• Easy installation
• Speed control over a wide range
• Quick Starting, Stopping, Reversing and Acceleration
• High Starting Torque
• Linear speed-torque curve
DC motors are mostly used from small tools and appliance to electric vehicles lifts & hoists due to this many people prefer using it.
Brushed: This is a traditional type of motor and is mostly used in applications that attract cost and its control system is simple like in consumer applications and basic industrial equipment. This type of motor can be divided into:
Series Wound: this type connect field winding with rotor winding and speed control is by varying the supply voltage. It has its limitation since it gives poor speed control while torque to the motor increase. This type is used in automotive, hoist, lifts and cranes due to its high starting torque.
Shunt wound: it has one voltage supply and it connects field winding in parallel with the rotor winding. This type of motor can deliver increased torque even without a reduction in speed by increasing the motor current. It is also characterized by a medium level of starting torque with constant speed hence is preferred for applications such as lathe, vacuum cleaners, conveyors & grinders.
Compound wound: this type combines the Series and Shunt type, where the difference in charges of the shunt winding is in such a way that it adds to the series fields. This type is said to have a high starting torque and run smoothly only when the load varies slightly. Is commonly used for driving compressors, variable-head centrifugal pumps, rotary presses, circular saws, shearing machines, elevators, and continuous conveyors.
Permanent Magnet: this type uses an electromagnet and is used in applications such as robotics, servo systems due to its control and low torque.
Brushless Motors
This type of motors yields some of the issues common to brushed motors and are typically simpler in design. Brushless controller uses Hall Effect sensors to detect the rotor position hence it can accurately control the motor through current in the rotor coils to regulate speed.
It is characterized by some advantages, which include long life span, little maintenance cost and high efficiency rated at (85%-90%). However, it has its disadvantage, which includes high initial cost and controllers that are more difficult. Brushless Gearmotors are mostly used in speed and positional control with applications such as fans, compressors and pumps where reliability and ruggedness are needed.

Find more information relating to Gearmotors, and ac-motoren here.



Media Contact:
Powertronic Drive Systems GmbH
power-tronic.com
Hartmannstr, Berlin, Germany 12207
Phone: +49 30 7719635
powertronic24@rediffmail.com

Submitted by:Powertronic Drive Systems GmbH
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