A DC motor has a specification written on its nametag as shown below. Parameter Value Power 3.0 kW Max rated voltage Max rated current 220 V 18.0 A Speed Moment of Inertia 2000 RPM 0.06 kgm² Armature resistance 0.65 Ohm Armature inductance 8 mH Back e.m.f. constant 1.25 V/(rad/sec) What kind (type) of DC motor is it? Elaborate the reason. Calculate the rated torque [Nm]. a. b. C. Calculate the mechanical power produced by the motor when the speed is 2000 RPM. d. Calculate motor efficiency [%] when the speed is 2000 RPM. If the holding torque of the motor 40 Nm, calculate no-load-speed [RPM]. е.

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4.
A DC motor has a specification written on its nametag as shown below.
Parameter
Value
Power
3.0 kW
Max rated voltage
Max rated current
220 V
18.0 A
Speed
2000 RPM
Moment of Inertia
0.06 kgm2
Armature resistance
0.65 Ohm
Armature inductance
8 mH
Back e.m.f. constant
1.25 V/(rad/sec)
What kind (type) of DC motor is it? Elaborate the reason.
Calculate the rated torque [Nm].
a.
b.
C.
Calculate the mechanical power produced by the motor when the speed is
2000 RPM.
Calculate motor efficiency [%] when the speed is 2000 RPM.
If the holding torque of the motor 40 Nm, calculate no-load-speed [RPM].
d.
е.
Transcribed Image Text:4. A DC motor has a specification written on its nametag as shown below. Parameter Value Power 3.0 kW Max rated voltage Max rated current 220 V 18.0 A Speed 2000 RPM Moment of Inertia 0.06 kgm2 Armature resistance 0.65 Ohm Armature inductance 8 mH Back e.m.f. constant 1.25 V/(rad/sec) What kind (type) of DC motor is it? Elaborate the reason. Calculate the rated torque [Nm]. a. b. C. Calculate the mechanical power produced by the motor when the speed is 2000 RPM. Calculate motor efficiency [%] when the speed is 2000 RPM. If the holding torque of the motor 40 Nm, calculate no-load-speed [RPM]. d. е.
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