Interested to Buy Any Domain ? << Click Here >> for more details...
Answer Posted / thowsif_csm team_emerson
DC Drives:-
Commonly a DC drive is a device that uses AC as
poer source to power and control a DC motor. The cheap
definition... The drive has two parts the power components
and a controler. The power components convert AC power to
DC by a Rectifier. The controller (among other things) is
basicly a high speed timer that fires a solid state device
(BPT, IGBT or some other gate) very rapidly (Pulse width
modulation on and off). The controller gets a setpoint from
a potentiometer or some other means perhaps a digital
number via some protocol and uses a means of maintaing this
setpoint by calculating the difference between the setpoint
and the actual speed with a tach or some other means and
adjust the output accordingly.
AC Drive:-
AC drives are also known as adjustable-
frequency drives (AFD), variable-speed drives (VSD),
Variable-frequency drives, microdrives or inverter drives.
Since the voltage is varied along with frequency, these are
sometimes also called VVVF (variable voltage variable
frequency) drives.
A AC drive is a system for controlling the rotational speed
of an alternating current (AC) electric motor by
controlling the frequency of the electrical power supplied
to the motor A variable frequency drive is a specific type
of adjustable-speed drive.
| Is This Answer Correct ? | 7 Yes | 0 No |
Post New Answer View All Answers
A cable with concentric PE conductor must be used with frequency converter circuits what does its means.?
On what basis the the size of Lightning arrester for buildings are selected ?
Explain The Application Of Storage Batteries?
george phenomenon of synchronous machine
What is the criteria that generally follow by distribution licenses to fix contact demand of their industrial customers?
how to find the capacitance value of the motor while running??
what is the effect of back reactive power on the generator ?
What is CVT and what is relation with wave trap?
I need bhel electrical test pattern & paper
why we use ac supply as 415 volts instead of 415 v why we cant apply 230 v for dc
WHAT IS IM (INDEX OF MOUNTING )IN MOTORS
Why an ac solenoid valve attract the plunger even though we interchanges the terminal? Will the poles changes?
if a 3phase 100kva distribution transformer , 400 v,50 hz, 4-wire system is loaded at 160 k.w mostly 1-phase Lighting & Airconditioning split a.c load what will be the net effect on the power system in terms of voltage, powerfactor, current , efficiency of xformer
What is making & breaking current ???
i want to know that how the height of Ct ,cvt ,LA calculated on the basis of creepage distance
