Comparison of stepper motor with DC servo motor

Comparison of stepper motor with DC servo motor :

sr. No.	Stepper motors	DC servo motor
1.	Control winding is not present.	Control wingding is present
2.	Stepping rate is governed by frequency of switching and not by supply voltage.	Does not rotate in steps.
3.	Number of steps can be precisely controlled by controlling the number of pulses.	DC servo motor gives continuous rotation.
4.	Brushes are absent.	Brushes are present
5.	Maintenance is low	High maintenance
6.	Due to load/no load conditions no change in running current.	Due to load/no load conditions sufficient change in running current.

Comparison between AC and DC servo systems

Comparison of stepper motor with DC servo motor Video:

Multiplexing and Multiple Access

Multiplexing And Multiple Access : Digital Communications Difference between Multiplexing and Multiple Access: Sr.No. Multiplexing Multiple Access 1 “In telecommunications and computer networks, multiplexing is a process where multiple analog message signals or digital data streams are combined into one signal over a shared medium.” “In telecommunications and computer networks, a channel access method or multiple access method allows several terminals connected to the same multipoint physical medium to transmit over it and to share its capacity.” 2 The multiplexed signal is transmitted over a communication channel, which may be a physical transmission medium. A channel-access scheme is based on a multiplex method that allows several data streams or signals to share the same communication channel or physical media.

Difference in between Time division multiplexing (TDM) and Frequency division multiplexing (FDM)

Difference in between TDM and FDM: This page on FDM versus TDM describes difference between FDM and TDM multiplexing . FDM is the short form of frequency division multiplexing and TDM is the short form of time division multiplexing. In FDM each signal is modulated onto different unique RF carrier frequency and all carrier frequencies are separated significantly so that bandwidth of the signals do not overlap in frequency domain. Figure: Difference in between TDM and FDM

Comparison between armature controlled and field controlled DC servo motor

Comparison between armature controlled and field controlled DC servo motor : Field controlled DC servomotor Armature controlled DC servomotor 1. Field is excited by control voltage Armature is excited by control voltage 2. Armature current kept constant Field current kept constant 3. Required low power amplifiers are simple to design Required high power amplifiers 4. Efficiency is poor Efficiency is better 5. It has large time constant It has small time constant 6. Cost is low Cost is high 7. It is open loop system It is close loop system Comparison between ar

M&MA

Search This Blog