Power Supply

Power Supplies

Floating level PS:

Ratings

Remarks

Filament PS

(AC-AC converters, 8 nos.)

10 kVA, 40-400 V AC, 400Hz, 3 Ø, Sinusoidal)

Floated at 55 kV

Discharge PS

(AC-DC converters, 24 nos.)

160 V, 100A DC

Floated at 55 kV

Ground level PS:



Accelerator PS

(Regulated High Voltage Power Supply)

80 kV, 130A

Grounded

Decelerator PS

5 kV, 10 A

Grounded

(derived from Accelerator PS by resistor network)

Magnet PS

60 V, 550A

Grounded





1 Filament Power supply



  • The NBI system for SST-1 uses 8 nos. of Filament PSs for AC type heating of filaments.
  •  8 nos. of such Filament power supplies are required to bias 24 filaments and to maintain constant filament temperature.
  • A resultant 24 phase AC heating system is used to minimize the ripple on plasma density.
  • Three phase AC output is controllable from 40-400V, 400Hz, sinusoidal with 10kVA power. 


2 Discharge Power supply


  • An ion source uses filament heating for thermal ionization and in turn producing plasma by arc discharge.
  • For the requirement of an arc discharge for the ion source, a fast dynamic discharge power supplies are required.
  • The DC output is 10-160V, 100A (max.) with peak ripple less than 400mV at rated load.
  • 24 such power supplies are used for one ion source.


3    Regulated High Voltage Power Supply (RHVPS)

  • Regulated high voltage power supply (RHVPS) is electrical power source of NBI which is used for biasing Accelerator grid of ion source.


A.   Switched power modules

Figure 3 Regulated High Voltage Power Supply (RHVPS



B.  Multi-Secondary Transformer for RHVPS


C.   RHVPS Control system


4.    Magnet Power supply

Magnet power supply is used in electromagnet to dump ion for neutralize the beam.


5.       Deceleration Power supply


Deceleration power supply to prevent back streaming of electron to plasma box

6.       Patent for RHVPS system


  • A patent has been awarded for design of RHVPS.
  • NBI group holds an intellectual property right (Patent) for RHVPS.
  • Indian patent, “A regulated High Voltage Power Supply” (No.:206556)