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in brushless motors commutation is achieved by switching the stator phases at the correct rotor positions eg at the
a brushless dc motor and a suitable drive unit are to be chosen for a continuous drive application the load has a
prepare a table to compare and contrast the following types of motorsa conventional dc motor with brushesb brushless
show that the rms value of a rectangular wave can be changed by phase-shifting it and adding to the original signal
the direction of the rotating magnetic fi eld in an induction motor or any other type of ac motor can be reversed by
what is a servomotor ac servomotors that can provide torques on the order of 100 n-m at 3000 rpm are commercially
a magnetically levitated rail vehicle uses the principle of induction motor for traction magnetic levitation is used
describe the operation of a single-phase ac motor list several applications of this common actuator is it possible to
speed control of motors ac motors as well as dc motors can be accomplished by using solid-state switching circuitry in
in some applications it is necessary to apply a force without creating a motion discuss one such application discuss
the harmonic drive principle can be integrated with an electric motor in a particular manner in order to generate a
list three types of hydraulic pumps and compare their performance specifications a position servo system uses a
discuss the origins of the hydraulic time constant in a hydraulic control system that consists of a four-way spool
sometimes either a pwm ac signal or a dc signal with a superimposed constant-frequency ac signal or dither is used to
convert 1001010112 into a hex number also convert 6d0f16 into a binary number what is the octal representation of each
consider the negative number -1101 which is in the binary form it has a decimal value of -13 determine its 2s
what are the advantages and disadvantages of pneumatic actuators in comparison with electric motors in process control
the sketch in figure p756 shows a half-sectional view of a flow control valve which is intended to keep the flow to a
compare and contrast valve-controlled hydraulic systems with pump-controlled hydraulic systems using a schematic
explain why accumulators are used in hydraulic systems sketch two types of hydraulic accumulators and describe their
identify and explain the components of the hydraulic system given by the circuit diagram in figure p755 describe the
discuss the reasons for using binary codes to represent information within a digital computeri convert the following
codes are employed in digital systems to represent information such as numerical values and text or characters consider
what are advantages of the cmos logic family over the ttl logic family how could the two logic families be combined in
a one-way road meets a two-way road as shown in figure p825 the vehicles on the one-way road are allowed to make right