MC14013BCL ,Dual type D flip-flopMaximum Ratings are those values beyond which damage to the device may occur.†Temperature Derating: ..
MC14013BCP ,Dual type D flip-flopMAXIMUM RATINGS* (Voltages Referenced to V )ASSÎÎÎÎÎÎSymbol Parameter Value UnitÎÎV DC Supply Volta ..
MC14013BCP.. ,Dual type D flip-flop** * * * *SEMICONDUCTOR TECHNICAL DATA* * * * * ** ** !** * * L SUFFIXThe MC14013B dual type D f ..
MC14013BCPG , Dual Type D Flip−Flop
MC14013BD ,Dual type D flip-flopMaximum Ratings are those values beyond which damage to the device may occur.†Temperature Derating: ..
MC14013BDR2 ,Dual D-Type Flip-FlopMAXIMUM RATINGS (Voltages Referenced to V )SSDT SUFFIX 013BCASE 948G ALYWSymbol Parameter Value Uni ..
MC6803CP ,1.0MHz; V(cc / in): -0.3 to +7.0V; 8-bit single-chip microcomputer (MCU)0 MOTOROLAM06801M06803SEMI CO N D U CTOR S35-01%;50 $LUESTE1NB§~VDW AUSTIN, TEXAS '73723' .MICROCOM ..
MC6803CP ,1.0MHz; V(cc / in): -0.3 to +7.0V; 8-bit single-chip microcomputer (MCU)0 MOTOROLAM06801M06803SEMI CO N D U CTOR S35-01%;50 $LUESTE1NB§~VDW AUSTIN, TEXAS '73723' .MICROCOM ..
MC6803CP-1 ,1.25MHz; V(cc / in): -0.3 to +7.0V; 8-bit single-chip microcomputer (MCU)BLOCK DIAGRAM.-LUElo‘mm‘ZE 0:T-lt/IW]tnt/IXDU)0U)>>ModeExpanded Multipiexed MPUExpanded Non-Multipl ..
MC6803L ,1.0MHz; V(cc / in): -0.3 to +7.0V; 8-bit single-chip microcomputer (MCU)BLOCK DIAGRAM.-LUElo‘mm‘ZE 0:T-lt/IW]tnt/IXDU)0U)>>ModeExpanded Multipiexed MPUExpanded Non-Multipl ..
MC6803P ,1.0MHz; V(cc / in): -0.3 to +7.0V; 8-bit single-chip microcomputer (MCU)MAXIMUM RATINGSSupply Voltage m —0.3 to +7.0 “Input Voltage m -O.3 to +7.0 nOperating Temperature R ..
MC6803P1 ,1.25MHz; V(cc / in): -0.3 to +7.0V; 8-bit single-chip microcomputer (MCU)0 MOTOROLAM06801M06803SEMI CO N D U CTOR S35-01%;50 $LUESTE1NB§~VDW AUSTIN, TEXAS '73723' .MICROCOM ..
MC14013B
Dual D-Type Flip-Flop
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Prepared by: Alfredo Ochoa, Alex Lara & Gabriel Gonzalez
Thyristors Applications Engineers
INTRODUCTIONIn all kinds of manufacturing, it is very common to have
equipment that has three phase motors for doing different
work functions on the production lines. These motor
functions can be extruders, fans, transport belts, mixers,
pumps, air compressors, etc. Therefore, it is necessary to
have equipment for controlling the start and stop of the
motors and in some cases for reversing them. Actually, one
of the most common solutions for performing this control
functions is by using three phase magnetic starters. It
consists of a block with three main mechanical contacts
which provide the power to the three main terminals of the
motor once its coil is energized. However, the magnetic
starter has a lot of disadvantages and the most common
appear when they are driving high current levels that can
cause arcing and sparks on their contacts each time they are
activated or de–activated. Because of these kind of effects
the contacts of the magnetic starters get very significantly
damaged causing problems in their functionality. With time
it can cause bad and inefficient operation of the motors. This
is why, thyristor should be considered as a low cost
alternative and indeed a powerful device for motor control
applications. Thyristors can take many forms but they have
certain features in common. All of them are solid state
switches that act as open circuits capable of withstanding the
rated voltage until triggered. When they are triggered,
thyristors become low impedance current paths and remain
in that condition (i.e. conduction) until the current either
stops or drops below a minimum value called the holding
level. Once a thyristor has been triggered, the trigger current
can be removed without turning off the device.
DEFINITIONS
Three phase induction motor.A three phase induction motor consists of a stator winding
and a rotor of one of the two following types: one type is a
squirrel–cage rotor with a winding consisting of conducting
bars embedded in slots in the rotor iron and short circuited
at each end by conducting end rings. The other type is a
wound rotor with a winding similar to and having the same
number of poles as the stator winding, with the terminals of
the winding being connected to the slip rings or collector
rings on the left end of the shaft. Carbon brushes bearing on
these rings make the rotor terminals available at points
external to the motor so that additional resistance can be
inserted in the rotor circuit if desired.
Three phase voltages of stator frequency are induced in
the rotor, and the accompanying currents are determined by
the voltage magnitude and rotor impedance. Because they
are induced by the rotating stator field, these rotor currents
inherently produce a rotor field with the same number of
poles as the stator and rotating at the same speed with respect
to the stationary rotor. Rotor and stator fields are thus
stationary with respect to each other in space, and a starting
torque is produced. If this torque is sufficient to overcome
the opposition to rotation created by the shaft load the motor
will come up to its operating speed. The operating speed can
never equal the synchronous speed of the stator field.
The following figure shows a three phase 1HP motor
controlled through a conventional magnetic starter which
has an over–load relay for protecting the motor against
over–load phenomena.
