3 Phase Motors

What is a 3 phase motor?

• A motor that operates on alternating current

• An electric motor that operates on three-phase power.

• A motor that operates on two-phase power

• A motor that operates on single-phase power

What are the advantages of using a 3 phase motor?

• Higher cost, more complex design, and limited availability.

• No advantages, same as using a single phase motor.

• Lower efficiency, rougher operation, inability to handle heavy loads, unreliability, and more maintenance.

• Higher efficiency, smoother operation, ability to handle heavy loads, reliability, and less maintenance.

What are the main components of a 3 phase motor?

• stator, rotor, and power supply

• circuit breaker, fuse, and switch

• transformer, capacitor, and resistor

• stator, rotor, and capacitor

How does a 3 phase motor work?

• A 3 phase motor works by using a direct current power supply.

• A 3 phase motor works by converting electrical energy into heat energy.

• A 3 phase motor works by creating a rotating magnetic field that interacts with the rotor to generate mechanical power.

• A 3 phase motor works by using a single phase power supply.

What is the difference between a single phase motor and a 3 phase motor?

• The main difference is the size of the motor.

• The main difference is the type of power they use.

• The main difference is the number of power phases they use.

• The main difference is the weight.

What are the different types of 3 phase motors?

• Brushless DC motors, universal motors, and hysteresis motors

• induction motors, synchronous motors, and permanent magnet motors

• DC motors, stepper motors, and servo motors

• Single-phase motors, split-phase motors, and capacitor-start motors

What is the purpose of a motor starter in a 3 phase motor?

• To regulate the speed of the motor.

• To provide time checks on the motor.

• To control starting, stopping, and provide overload protection.

• To cool down the motor.

What are the common applications of 3 phase motors?

• refrigerators, televisions, and computers

• toasters, blenders, and coffee makers

• cars, motorcycles, and bicycles

• industrial machinery, pumps, compressors, fans, conveyors, and HVAC systems

What are the safety precautions to be taken while working with 3 phase motors?

• Do not wear any PPE, disregard grounding, skip lockout/tagout procedures, use rusty tools, be oblivious to hazards

• Wear inappropriate PPE, neglect grounding, ignore lockout/tagout procedures, use conductive tools, be unaware of hazards

• Wear incorrect PPE, forget about grounding, neglect lockout/tagout procedures, use sharp tools, be ignorant of hazards

• Wear appropriate PPE, ensure proper grounding, follow lockout/tagout procedures, use insulated tools, be aware of hazards

Continuity of motor windings from phase to phase should be checked.....

• U to V,  V to W ,  W to U

• U to U,  V to V ,  W to W

• U to V,  W to W ,  W to V

• U to V,  V to V ,  W to V