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Locked Rotar Current- The current a motor draws when the rotar is stationary & full power is applied
Locked Rotar Torq- the amount of torq a motor has when the rotar is stationary and full power is applied
Closed Transition- When we never disconnect the motor from one stage to another [one voltage to another]
Open Transition- disconnect the motor (in Wye) and reconnect it in Delta
(Disconnect motor going from one stage or voltage to another.)
In Wye Delta starting application, how many external leads do we need?
6 ( T1- T6 ) {making a delta into a wye}
[in a dual voltage motor you need 9]
Interpoles - To reduce armature reaction or prevent arcing at the brushes
(problem) (symptom of problem)
What type of motor starters use SCR?
Answer: Solid State
Silicone Control Rectifier (SCR) - like a controlled diode it allows current to flow in one direction.
SCR has 3 Leads: Anode, Cathode, Gate
What is the difference between Synchronous speed & Rated Speed?
Ans:
Synchronous speed is the speed of the magnetic field & Rated Speed is the actual speed of the shaft or rotar.
In dual voltage motor applications how do we configure the windings, that is, for low voltage are they in series or parallel?
Parallel
Locked Rotar Torq- the amount of torq a motor has when the rotar is stationary and full power is applied
Closed Transition- When we never disconnect the motor from one stage to another [one voltage to another]
Open Transition- disconnect the motor (in Wye) and reconnect it in Delta
(Disconnect motor going from one stage or voltage to another.)
In Wye Delta starting application, how many external leads do we need?
6 ( T1- T6 ) {making a delta into a wye}
[in a dual voltage motor you need 9]
Interpoles - To reduce armature reaction or prevent arcing at the brushes
(problem) (symptom of problem)
What type of motor starters use SCR?
Answer: Solid State
Silicone Control Rectifier (SCR) - like a controlled diode it allows current to flow in one direction.
SCR has 3 Leads: Anode, Cathode, Gate
What is the difference between Synchronous speed & Rated Speed?
Ans:
Synchronous speed is the speed of the magnetic field & Rated Speed is the actual speed of the shaft or rotar.
In dual voltage motor applications how do we configure the windings, that is, for low voltage are they in series or parallel?
Parallel
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