What are the common types of AC motors used in HVAC systems?

The correct answer includes split-phase, capacitor-start, and permanent split capacitor motors, which are all widely used in HVAC systems due to their specific operational advantages.

Split-phase motors are commonly used in applications requiring relatively low starting torque, making them ideal for small fans and pumps in HVAC systems. Their design allows for adequate performance in lighter applications while being cost-effective.

Capacitor-start motors provide additional starting torque, making them suitable for applications that require a stronger initial push to start the motor. This feature is crucial for HVAC systems that need to overcome inertia when starting up.

Permanent split capacitor motors are known for their efficiency and quiet operation, making them excellent choices for HVAC systems where noise and energy consumption are concerns. These motors can run continuously without overheating and maintain a constant speed under varying load conditions.

The other answer choices contain motor types that are less applicable or common in HVAC applications. Induction motors, although present, are typically not classified in the same way as the other mentioned options in HVAC contexts, while brushed and brushless motors are more characteristic of electronic applications rather than traditional HVAC scenarios.