Listing ID #4906518
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Contact SupplierThe conventional method to have auxiliary DC Supply for battery charging & other DC Loads is to use a diesel generating set of constant speed & a rectifier unit.Integrated Electric developed a variable speed DC Alternator for coupling with Diesel engine as a source of DC auxiliary power. The principle of working is as under. The basic generator will be just like any brushless AC Generator consisting of main stator, Main rotor, Exciter stator & Exciter rotor. The generator is of three phase, variable speed, variable kW output
For. Example the DC Alternator is capable of delivering :
SYSTEM FEATURES
PRINCIPLE OF OPERATION OF DC ALTERNATORS
I. The rotor of the revolving field generates a rotating flux which induces the following emf’s in the stator. The alternator builds up voltage with the help of residual magnetism & mainly from the permanent magnets housed in the exciter stator..
II. The 3 Ph.AC from the main stator is fed to the Diode bridge.
III. The automatic Digital voltage regulator (AVR) receives the following signals.
The AVR uses these signals to compute the amount of excitation required to maintain the terminal voltage up to its rated current rating & reduce the terminal voltage on further loading of DC Alternator & hence protect the DC Alternator from over loading. The digital AVR also monitors the total overall load current & gives feed back signal to electronic governor to change the speed depending on load.
I. The rotor of the revolving field generates a rotating flux which induces the following emf’s in the stator. The alternator builds up voltage with the help of residual magnetism & mainly from the permanent magnets housed in the exciter stator..
IV. The Exciter field induces 3 phase AC at 100Hz. in the exciter rotor.
V. The rotating diodes mounted in the exciter rotor rectify the AC voltage to DC Voltage and supply it to the Main rotor field winding
VI. This regeneration continues and till the rated DC output voltage is achieved. The output voltage will be maintained at its rated value up to its rated current as indicated on the name plate of the DC Alternator.