A.C motor

 There a lot of things we can do if we can control and manipulate the motor. Here is the most important formula when you come to play with the a.c motor.

VALUE	1-PHASE	3-PHASE
WATTS (W)	I X E X PF	I X E X 1.73 X PF
KILOWATTS (kW)	E X L X PF 1000	E X I X 1.73  X PF 1000
AMPERES (I)	kW X 1000 E X PF	kW X 1000 E X 1.73 X PF
KILOVOLT AMPERES (kVA)	I X E 1000	I  X E X 1.73 1000
FREQUENCY (Hertz or f)	Rotor Poles X RPM 120	Rotor Poles X RPM 120
RPM (n)	Hertz X 120 Rotor Poles	Hertz X 120 Rotor Poles
NUMBER OF ROTOR POLES (P)	Hertz X 120 RPM	Hertz X 120 RPM
POWER FACTOR (PF)	Actual Watts I X E	Actual Watts I X 1.73 X E
HORSEPOWER (HP)	I v E X PF 746 X  EFF	I X E X 1.73 X PF 746 X EFF
AMPERES (when kW is known)	kW X 1000 E X PF	kW X 1000 E X 1.73 X PF
AMPERES (when kVA is known)	kVA X 1000 E	kVA X 1000 E X 1.73

 

I	=	current in amperes
E	=	voltage in volts
W	=	watts
kW	=	power in kilowatts
kVA	=	apparent power in kilo-volt-amperes
HP	=	output power in horsepower
RPM (n)	=	motor speed in revolutions per minute (RPM)
ns	=	synchronous speed in revolutions per minute (RPM)
Rotor Poles (P)	=	number of poles
Hertz (f)	=	frequency in cycles per second (CPS)
T	=	torque in pound-feet
EFF	=	efficiency as a decimal
PF	=	power factor as a decimal
HP	=	horsepower

 My next tutorial will show you how to connect inverter to 3 phase a.c motor