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Q3. Explain the operation of constant Volts/Hz (V/f) control of induction motor - open loop implementation...
Q3. Explain the operation of constant Volts/Hz (V/f) control of induction motor - open loop implementation...
Q3. Explain the operation of constant Volts/Hz (V/f) control of induction motor - open loop implementation with linear offset. 10/30, 60H supply Diode rectifier No Vo Boost DB V2v, sin e voltage G V le Inverter ИЯ ve=v2v, sin (6 Speed command Motor
Q3. Explain the operation of constant Volts/Hz (V/f) control of induction motor - open loop implementation with linear offset. 10/30, 60H supply Diode rectifier No Vo Boost DB V2v, sin e voltage G V le Inverter ИЯ...
a four pole 60-Hz, 440-V three phase induction motor is supplied by a variable voltage variable...
a four pole 60-Hz, 440-V three phase induction motor is supplied by a variable voltage variable frequency source. the motor has negible stator resistance and a rotor resistance of 0.1 ohm. the total inductance is 2 x 10 ^-3 H. a)find lowest possible frequency and voltage of proper operation. b) determine the starting torque, the speed at maximum torque, and the router's applied voltage when supply frequency is 8 hz, 40 hz and 60 hz
3, A 34, 400-V 50-Hz induction motor takes 4 times the full-load current and develops twice the f...
3, A 34, 400-V 50-Hz induction motor takes 4 times the full-load current and develops twice the full- load torque when direct-switched to 400-V supply. Calculate in terms of full-load values (a) the line curent, the motor current and starting torque when started by an auto-starter with 50% tap and (b) the voltage that has to be applied and the motor current, if it is desired to obtain full-load torque on (a) 100%, 200%, 50% (b) 228 V, 282%) starting...
Q3. A single-phase, 120 V, 60 Hz, four-pole, split-phase induction motor has the following equivalent circuit...
Q3. A single-phase, 120 V, 60 Hz, four-pole, split-phase induction motor has the following equivalent circuit parameters: Stator parameters: The Main winding (R =1.512, X=2.522), and the auxiliary winding (R=2.512, X=2.52), Rotor parameters referred to the stator side: (R=1N, X=1.592). The magnetizing reactance is equal to 4082. (a)Determine the standstill impedances of both windings. (b)Determine the starting torque and the starting current of the motor if it is started from rated voltage mains as a split phase induction motor. (c)Determine...
5. A 208-V four-pole 60-Hz Y-connected wound-rotor induction motor is rated at 30 hp. Its equivalent...
5. A 208-V four-pole 60-Hz Y-connected wound-rotor induction motor is rated at 30 hp. Its equivalent circuit components are R=0.100 Ry=0.070. X - 10.00 R = 250 X; -0.2100 X=0.21002 Praw=500 W P =0.5% of input at full load For a slip of 0.05, find (a) The line current (b) The induced voltage in the rotor (c) The stator power factor (d) The rotor power factor (e) The rotor frequency (f) The stator copper losses (g) The core loss (h)...
4. A three-phase induction motor has the following data: Nominal power, P 7.5 kW Nominal voltage, = 400 V Connection: Y Nominal frequency, f-50 Hz Nominal speed, nn 960 rpm Stator resistance, r,...
4. A three-phase induction motor has the following data: Nominal power, P 7.5 kW Nominal voltage, = 400 V Connection: Y Nominal frequency, f-50 Hz Nominal speed, nn 960 rpm Stator resistance, r, 0.55 Ω Rotor resistance referred to a stator winding phase: r:-0.51 Ω Stator leakage inductance, L,-4.4 mH Rotor leakage inductance referred to a stator winding phase,1'-4.4 mH Magnetising inductance L-65 mH How many pole pairs has the motor? 12] a. Calculate the nominal power factor of the...
Q3. Explain the operation of constant Volts/Hz (V/f) control of induction motor - open loop implementation with linear offset. 10/30, 60H supply Diode rectifier No Vo Boost DB V2v, sin e voltage G V le Inverter ИЯ ve=v2v, sin (6 Speed command Motor
Q3. Explain the operation of constant Volts/Hz (V/f) control of induction motor - open loop implementation with linear offset. 10/30, 60H supply Diode rectifier No Vo Boost DB V2v, sin e voltage G V le Inverter ИЯ...
3, A 34, 400-V 50-Hz induction motor takes 4 times the full-load current and develops twice the full- load torque when direct-switched to 400-V supply. Calculate in terms of full-load values (a) the line curent, the motor current and starting torque when started by an auto-starter with 50% tap and (b) the voltage that has to be applied and the motor current, if it is desired to obtain full-load torque on (a) 100%, 200%, 50% (b) 228 V, 282%) starting...
Q3. A single-phase, 120 V, 60 Hz, four-pole, split-phase induction motor has the following equivalent circuit parameters: Stator parameters: The Main winding (R =1.512, X=2.522), and the auxiliary winding (R=2.512, X=2.52), Rotor parameters referred to the stator side: (R=1N, X=1.592). The magnetizing reactance is equal to 4082. (a)Determine the standstill impedances of both windings. (b)Determine the starting torque and the starting current of the motor if it is started from rated voltage mains as a split phase induction motor. (c)Determine...
5. A 208-V four-pole 60-Hz Y-connected wound-rotor induction motor is rated at 30 hp. Its equivalent circuit components are R=0.100 Ry=0.070. X - 10.00 R = 250 X; -0.2100 X=0.21002 Praw=500 W P =0.5% of input at full load For a slip of 0.05, find (a) The line current (b) The induced voltage in the rotor (c) The stator power factor (d) The rotor power factor (e) The rotor frequency (f) The stator copper losses (g) The core loss (h)...
4. A three-phase induction motor has the following data: Nominal power, P 7.5 kW Nominal voltage, = 400 V Connection: Y Nominal frequency, f-50 Hz Nominal speed, nn 960 rpm Stator resistance, r, 0.55 Ω Rotor resistance referred to a stator winding phase: r:-0.51 Ω Stator leakage inductance, L,-4.4 mH Rotor leakage inductance referred to a stator winding phase,1'-4.4 mH Magnetising inductance L-65 mH How many pole pairs has the motor? 12] a. Calculate the nominal power factor of the...
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