control engineering

1. DHIRENDRA GOCHER(K10913)
BTECH 3rd YEAR
6th sem
BRANCH-MECHANICAL
SUBMITTED TO - Prof. SOMESH CHATURVEDI

3.  DC motors provide excellent control of speed for
acceleration and deceleration.
 The power supply of a DC motor connects directly to
the field of the motor which allows for precise voltage
control, and is necessary for speed and torque control
applications. DC drives, because of their simplicity,
ease of application, reliability and favourable cost have
long been a backbone of industrial applications. DC
drives are less complex as compared to AC drives
system.
 DC drives are normally less expensive for low
horsepower ratings. DC motors have a long tradition of
being used as adjustable speed machines and a wide
range of options have evolved for this purpose.

4.  By varying the armature voltage for below rated
speed.

 By varying field flux should to achieve speed above
the rated speed.

5.  Traditionally armature voltage using Rheostatic method
for low power dc motors.
 Use of conventional PID controllers.
 Neural Network Controllers.
 Constant power motor field weakening controller based
on load-adaptive multi- input multi- output linearization
technique (for high speed regimes).
 Single phase uniform PWM ac-dc buck-boost converter
with only one switching device used for armature voltage
control

6.  D c Voltage Source
 Current Sensor
 Ps-simulink Converter
 Solver Configuration
 Resistor And Inductor
 Rotational Electromechanical Converter
 Rotational Damper
 Rotational Motion Sensor
 Inertia
 Wheel And Axis
 Translational Spring

7. DC VOLTAGE SOURCE
The DC Voltage Source block represents an
ideal voltage source that is powerful enough to
maintain specified voltage at its output
regardless of the current flowing through the
source.
You specify the output voltage by using the
Constant voltage parameter, which can be
positive or negative.

8. The Current Sensor block represents an
ideal current sensor, that is a device that
converts current measured in any electrical
branch into a physical signal proportional
to the current.
 Connections + and – are electrical
conserving ports through which the sensor
is inserted into the circuit.

9.  The PS-Simulink Converter block converts a
physical signal into a Simulink output signal. Use this
block to connect outputs of a Physical Network
diagram to Simulink scopes or other Simulink blocks.

10. SOLVER CONFIGURATION :
Each physical network represented by a connected Simscape block
diagram requires solver settings information for simulation. The
Solver Configuration block specifies the solver parameters that your
model needs before you can begin simulation.
 RESISTOR AND INDUCTOR :
Connections + and – are conserving electrical ports corresponding to
the positive and negative terminals of the resistor, respectively.
Byconvention, the voltage across the resistor is given by V(+) – V(–),
and the sign of the current is positive when flowing through the device
from the positive to the negative terminal.

11.  ROTATIONAL ELECTROMECHANICAL
CONVERTER :
The Rotational Electromechanical Converter block provides an
interface between the electrical and mechanical rotational domains.
It converts electrical energy into mechanical energy in the form of
rotational motion, and vice versa.
 ROTATIONAL DAMPER :
The Rotational Damper block represents an ideal mechanical
rotational viscous.

12.  ROTATIONAL MOTION SENSOR :
The Ideal Rotational Motion Sensor block represents an ideal
mechanical rotational motion sensor, that is a device that
converts an across variable measured between two
mechanical rotational nodes into a control signal proportional
to angular velocity or angle.
 INERTIA :
The Inertia block represents an ideal mechanical rotational
inertia. The block has one mechanical rotational conserving
port. The block positive direction is from its port to the reference
point. This means that the inertia torque is positive if inertia is
accelerated in positive direction.

13.  WHEEL AND AXIS
The wheel and the axle have the same axis, and the axis is assumed
to be rigidly connected to the frame, thus making this mechanism an
ideal converter of mechanical rotational into mechanical translational
motion. The mechanism has two connections: a mechanical
rotational port A, which corresponds to the axle, and a mechanical
translational port P, which corresponds to the wheel periphery.
 TRANSLATIONAL SPRING
The Translational Spring block represents an ideal mechanical
linear spring. The block positive direction is from port R to port
C. This means that the force is positive if it acts in the direction
from R to C. Initial angular velocity of the inertia. This
parameter specifies the initial condition for use in computing
the block's initial state at the beginning of a simulation .

15.  The Ideal Rotational Motion Sensor block represents a device
that measures the difference in angular position and angular
velocity between two nodes. In this case, we employ the block
to measure the position and velocity of the motor shaft as
compared to a fixed reference represented by the Mechanical
Rotational Reference block.
 The Current Sensor block represents another sensor,
specifically it measures the current drawn by the motor. The
ground for the electrical portion of our system is defined by the
Electrical Reference block. The Controlled Voltage Source
block serves as the power source for the motor where you can
externally define the voltage signal by connecting an input to
the block.
 The PS-Simulink blocks convert physical signals to Simulink
output signals, while the Simulink-PS block conversely converts
a Simulink input signal to a physical signal. These blocks can
be employed to convert the Simscape signals which represent
physical quantities with units to Simulink signals.

18.  The current of a dc motor has been successfully
controlled by using mechanical rotational elements
and translational and rotational elements control
the speed and position of motor by using rotational
motion sensor. A DC motor specification is taken
and corresponding parameters are found out from
derived design approach. The simulation results
under varying reference speed and varying load
are also studied and analyzed. The model shows
good results under all conditions employed during
simulation.

19.  https://pvpmc.sandia.gov/modeling-steps/2-dc-module-
iv/diode-equivalent-circuit-models/
 http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1
.395.9087 rep=rep1&type/
 http://in.mathworks.com/help/physmod/elec/ref/solarcell.h
tml
 http://www.sciencedirect.com/science/article/pii/S209099
77140001 82