Interested to Buy Any Domain ? << Click Here >> for more details...
Answer Posted / raghavendran
Drives can be classified as:
* Constant voltage
* Constant current
* Cycloconverter
In a constant voltage converter, the intermediate DC link
voltage remains approximately constant during each output
cycle. In constant current drives, a large inductor is
placed between the input rectifier and the output bridge, so
the current delivered is nearly constant. A cycloconverter
has no input rectifier or DC link and instead connects each
output terminal to the appropriate input phase.
The most common type of packaged VF drive is the
constant-voltage type, using pulse width modulation to
control both the frequency and effective voltage applied to
the motor load.
| Is This Answer Correct ? | 3 Yes | 0 No |
Post New Answer View All Answers
Electromagnetic torque developed by the motor is compared to shaft torque. A less B same C depends on motor design D more
mention hazard experienced during installation
I need bhel electrical test pattern & paper
Factory acceptance test. FAT. For 132 kv transmisstion towers what is that meaning and what are the tests commonly companies perform now days.
how generator avr give to the input?
how oil in the MOCB was reduced compared with OCB? what are the features of the MOCB?
Hi everyone, I'm Lachuu, recently joined automation company as PLC Engineer. I have certain basic question, I request all big gurus and seniors to answer these question. Because this will be very helpful to me as well starters like me. How to design a control circuit (ex: pick & place - my current project) Yamaha robot PxYx series controller RCX222, using 6 cylinder double acting, plc keyence kv p16r 2 expansion unit for input and output each. How to select panel terminal mcb elcb powersupply. My main concern in some projects how to select dc power supply, mcb rcb(I came across dif bt b c d curves, but stil confusing, pls help me :-(. I would really appreciate all who are going respond to this question.
what is the circutor?why we use it ?
What is the source of dependent source ?
a)In a 3-phase 4-wire circuit, a circuit breaker is selected to protect the circuit whose highest fault level is 6.6 MVA. Determine the required minimum breaking capacity in kA. (Note: Covert 3-phase power in terms of kA to find answer.) b)Using the below, determine the required minimum making capacity in kA as a “peak value”. Rate breaking capacity (Icn) ka: Icn<= 1.5 Factor = 1.41 1.5
WITCH CARDS IN USE IN FIRE CONTROL PANEL.
What is the criteria for selecting the voltage classes of an AC Induction Motor.The KW rating above/below which ht/lt selection is made may be provided in details.
i have a 4 Mva transformer 34.5 kv / 480-277 v and i used 2 parallel 3200 amp bus duct for the secondary feeder using 3 ply of bus bar ( 3/8" x 5" ) as a common where the flexible link terminated and 6300 amps breaker for the main, the lower bus duct reaches 70 degrees and the upper bus duct reaches 55 degrees when i used thermal scanner. why the temperature is not balance when the load reaches 3600 amps.
advantages & disadvantages of Lagging and leading power factor .
HOW TO SET THE EARTH FAULT SETTINGS IN ACB????????????
