AC Motors have always been in competition with their DC counterparts since the widespread use of electrical technology within industries. While both these motors have their own sets of pros and cons, AC Motors are slowly taking over the DC motor-dominated industrial sector thanks to Adjustable Speed Drives.
Being a type of Variable Speed Drive, an Adjustable Speed Drive can be employed in any application that requires precise electrical control over mechanically powered equipment. There have been several methods for motor control, however, Adjustable Speed Drives are gaining fame due to their increased energy efficiency.
Adjustable Speed Drives are limited to AC Motors, and therefore having a quality motor can greatly upheave your manufacturing capabilities.
Accurate Control
The development of Adjustable Speed Drive technology has allowed operators to gain precise control over their equipment, coupled with AC Motors. The use of this technology protects machinery from undue damage as the amount of torque generated by the motor would be dependent on the user’s parameters.
Extended Lifetime
Whenever AC Motors are started, they draw an inrush current equivalent to 7 – 8 times the nominal fill-load current. The current generates a high amount of heat and puts stress on the motor windings, which with the passage of time deteriorates the motor’s life. Using a quality AC Motor in conjunction with an AC Drive allows the motor to be started at zero frequency and voltage! The gradual buildup in frequency and voltage prevents any sudden in-rush current. Any increase in current is subject to an increase in the motor’s speed, which is dependent upon the user. As a result, the operator experiences longevity in the motor’s operation.
Greater Protection
The entire power distribution system connected to the motor is placed under enormous strain due to the inrush current. This brings in sag into the supply voltage and negatively affects the capacity of the entire system. Furthermore, sensitive loads such as computers, sensors, contactors, etc. would also be at risk. The use of AC Motors allows Adjustable Speed AC Drives to take over and eliminate voltage sag, resulting in a more resilient power system.
Energy Savings
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