Question

in
a DC MOTOR, how does the dead zone get effected by the load( with
load and without load). gives your explainations

Answer #1

I have a 9V DC motor with current of 135mA (no load)
and 1.20A (stalled). What potentiometer should I use?

The full-load armature current of a 5 hp, 150 V shunt dc motor
is 30 A. The field (shunt) resistance and the armature resistance
of the motor are ????F = 125 ? and ???????? = 0.15, respectively.
At a random speed of 1800 rpm magnetization curve of the motor has
measured and is shown in the table below. ????0 (V) armature
voltage 10 90 110 140 170 185 ???????? (A) field (shunt) current 0
0.82 1 1.2 1.7 2.88 Calculate...

You must design a power transmission system to connect a DC
motor to its load. The motor is given in the motor catalogue as a
BM1400 motor. You must create a transmission that will connect to
this motor and have a two stage gear reduction (i.e. there must be
two sets of gear reduction) with a total drive reduction of 10:1.
The final output shaft must be at 90 deg from the input shaft. You
must specify all the components...

Question 2
The full-load armature current of a 5 hp, 150 V shunt dc motor
is 30 A. The field (shunt) resistance and the armature resistance
of the motor are ????F=125 ? and ????????=0.15, respectively. At a
random speed of 1800 rpm magnetization curve of the motor has
measured and is shown in the table below.
EO(V) armature voltage
10
90
110
140
170
185
IF (A) field (shunt) current
0
0.82
1
1.2
1.7
2.88
Calculate the following:
a....

A dc series motor is connected to a constant-toque load, which
may be considered to require a constant electromagnetic torque
regardless of motor speed. Neglect the voltage drops due to the
armature and series-field resistances, the armature reaction, and
the effects of saturation.
(a) By what percent is the motor speed changed wgen the line
voltage is reduced from 230 V to 200 V?
(b) Repeat (a), assuming a shunt motor.
(c) State briefly what effects saturation might have on...

A
750V DC shunt motor takes 100A and runs at 3000rpm at full load.
The armature resistance is 1 ohm and the field winding resistance
is 200 ohm. Assume magnetic linearity and flux is directly
proportional to the field current.
Compute its new speed if the developed torque remains the same
after adjusting the field winding resistance to 250 ohm.

how to calculate the dead load and the wind load of a bridge 370
m long, 56 m wide and a height of 37 m?
wind speed of 46 m/s
(can assume anything needed)
please I need help with this.

how do you make a a dc motor with magnets and
commutators

Why does steady state rotor speed decrease with load torque for
series motor and remain constant for shunt and separately excited
motors? What effect of field current have on motor speed?

At t=0 the current to a dc electric motor is reversed,
resulting in an angular displacement of the motor shaft given by
?(t)=( 247 rad/s )t?( 19.7 rad/s2
)t^2?( 1.54 rad/s3 )t^3.
A) How many revolutions does the motor shaft turn through
between the time when the current is reversed and the instant when
the angular velocity is zero?
B) How fast was the motor shaft rotating at
t=0, when the current was reversed?
C) Calculate the average angular velocity...

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