Answer / ajay daultani

DC drives are used for DC motors speed control whereas ac
drives are used for AC motors . Moreover DC drives have
only converter whereas ac drives have both converter and
inverter . in DC drives , thyristors are normally used for
converter whereas in Ac drives , thyristors/IGBT/ IGCT are
used dependong on the applications .

Answer / sachin

DC Drives have chopping ckt. while AC drives have converter
& inverter

Answer / mayur patel

in dc drives speed control is done by armeture control
(below base speed)and field control(above base speed)while
in ac drives speed control is done by changing th frequncy.

Answer / abhas patel

drives are used only for motion control so if you are
talking about ac or dc drives then both are only used for
motor speed control by controlling ac or dc output voltage

DC drives are used for DC motors speed control whereas ac
drives are used for AC motors . Moreover DC drives have
only converter whereas ac drives have both converter and
inverter . in DC drives , thyristors are normally used for
converter whereas in Ac drives , thyristors/IGBT/ IGCT are
used dependong on the applications

DC drives performing the following functions:
1.speed control of DC motors
2.Breaking by applying resistance at rotor.
3.uses converter and chopper.

AC drives performing the following functions:

1.speed control of AC motors
2.Breaking/accelerating by changing the frequency of the
supply.
3.uses converter and inverter

Answer / rvg.msceb

DC drives performing the following functions:
1.speed control of DC motors
2.Breaking by applying resistance at rotor.
3.uses converter and chopper.

AC drives performing the following functions:

1.speed control of AC motors
2.Breaking/accelerating by changing the frequency of the
supply.
3.uses converter and inverter.

Answer / nilesh chougale

AC dirves are used for smooth operation of motor.
AC drive work on ffrequency.
AC drives have converter as well as inverter

DC drives works on voltage
DC drive having only converter.

Answer / m

u r Wrong.

Answer / abhimannu nayak

drives are used only for motion control so if you are
talking about ac or dc drives then both are only used for
motor speed control by controlling ac or dc output voltage

DC drives are used for DC motors speed control whereas ac
drives are used for AC motors . Moreover DC drives have
only converter whereas ac drives have both converter and
inverter . in DC drives , thyristors are normally used for
converter whereas in Ac drives , thyristors/IGBT/ IGCT are
used dependong on the applications

DC drives performing the following functions:
1.speed control of DC motors
2.Breaking by applying resistance at rotor.
3.uses converter and chopper.

AC drives performing the following functions:

1.speed control of AC motors
2.Breaking/accelerating by changing the frequency of the
supply.
3.uses converter and inverter

Answer / sridhar

1.AC DRIVE main purpose to used for speed control
application ,to changing the frequncy(fz).
mainly ac drive used for conveyor.

Answer / moin patel

1)A drives is use to control the speed of motor and also we can say the machine which are rune by the AC or DC motor,so As its name AC drive is use to control AC motors and DC Drives is use to control DC motor.
2)AC driver is run on the AC supply and DC drive is run on DC supply so first it convert AC to DC by the Brush
3)BCZ of this brush there are spark is produce so DC drives are not use at patrol-pump etc dangerous place,

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