meth
a dc motor is connected to a 120 vdc line and has a current draw of 2.6 a, the motor is operating a load that requires 12 in lb of torque at a speed of 1300 rpm
HP= 2.842
eff= 63.102
rotating part of the generator
armature
most converters that supply power to brushless dc motors produce a _______
trapezoidal wave
holtz operates at what rpm
1200
the _____ winding is made of many turns of small wire and is located at the top of the stator core.
start
a dc motor is connected to a 240 vdc line and has a current draw of 14 a, the motor is operating a load that requires 143 in lb of torque at a speed of 1250 rpm
hp= 2.842
eff= 63.102
force that tends to cause rotation
torque
brushless dc motors that require very smooth operation such as grinders that produce a finished surface are powered by _____
sine wave
in a motor that has a rotating magnetic field, the speed of that magnetic field is reffered to as the
synchronous speed
the _____ winding is made of few turns of large wire and is located at the top of the stator core.
run
a dc motor is connected to a 120 vdc line and has a current draw of 25 a, the motor is operating a load that requires 75 in lb of torque at a speed of 2000 rpm
hp= 2.385
eff= 59.307
when full voltage is applied to the both the armature and the shunt field, the motor operates at
base speed
the compound motor connection that is rarely used
differential
in a universal motor, inductive compensation can be used when the motor is connected to
ac or dc
dc motor known as constant speed is the
shunt motor
a dc motor is connected to a 120 vdc line and has a current draw of 54 a, the motor is operating a load that requires 400 in lb of torque at a speed of 1250 rpm
hp=7.95
eff=91.52
when reduced voltage is applied to armature and full voltage is maintained to shunt field, the motor operates
underspeed
list two factors that determine the synchronous speed of split phase motor
number of poles
frequency of power supply
voltages of a two phase system are _____ degrees out of phase with each other
180
consequent pole motor is essentially a
2 speed motor
a dc motor is connected to a 240 vdc line and has a current draw of 42 a, the motor is operating a load that requires 350 in lb of torque at a speed of 1575 rpm
hp=8.765
eff= 64.867
when full voltage is applied to the armature and reduced current flows through the shunt field, the motor operates at
overspeed
a device that converts electrical input into mechanical output is called
motor
items that ride against the commutator to make connections
brushes
what motor can develop high starting torque
series