![]() ![]() However, on/off controls like starters are limited, only fully on, or entirely off. Simple motor starter circuits allow us to connect two of these starters, interlocked with each other, which can start and run the motor in either direction with two of the phase lines reversed. As another comparison, DC motors run less efficiently due to the wear and tear of the carbon brushes which accomplish the rotation of the magnetic field in the rotor.Īlthough these 3-phase motors have some tremendous advantages, there are some added difficulties when it comes to operating them. In addition, the single-phase motors are far more difficult to start and run in a controlled direction. They use less current than their lower voltage, single-phase relatives. When it comes to moving the big loads demanded for industrial operations, the 3-phase motor is usually called to be the heavy hitter. Internal parameters allow the user excellent motor control. They can be configured to run in applications spanning from small standalone machine centers, up to vast networks of huge machines. The VFD solves the challenges of driving a 3-phase motor with careful speed control and efficiency, without being overly cost-prohibitive in most cases.
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