Question

Compared to PSC motors, brushless DC motors:

A. Have higher efficiency.
B. Are more prone to overheating.
C. Require more maintenance.
D. Are less energy-efficient.

Answer 1

Compared to PSC motors, brushless DC motors have higher efficiency, are less prone to overheating, and require less maintenance.

Step-by-step explanation:

Compared to PSC motors, brushless DC motors:

1. Have higher efficiency. A brushless DC motor typically has a higher efficiency compared to a permanent split capacitor (PSC) motor. This means that a greater percentage of electrical energy is converted into mechanical energy, resulting in less wasted energy.
2. Are less energy-efficient. This statement is incorrect. Brushless DC motors are actually more energy-efficient than PSC motors due to their higher efficiency.
3. Are more prone to overheating. Brushless DC motors are generally less prone to overheating than PSC motors. The absence of brushes and commutators reduces the friction and heat generated during operation.
4. Require more maintenance. Brushless DC motors generally require less maintenance compared to PSC motors. The absence of brushes eliminates the need for periodic brush replacement and associated maintenance.

Moreover, brushless DC motors require less maintenance as there are no brushes to wear out, unlike PSC motors, which have mechanical contacts that wear over time. Their reduced maintenance and increased efficiency contribute to an overall reduction in energy consumption, making them a more eco-friendly option in applications where electric motors are utilized. Brushless DC motors' efficiency makes them less likely to waste power, reducing unnecessary stress on the power grid and lessening environmental impact.