Generator using its bush less / AVR Alternator technology in 2008. Since then numerous organizations have performed extensive testing on our generators VIDHATA assembles the genset to meet its’ clients requirements by adding the appropriate diesel engine to our DC alternators. The engines are available in either a liquid or air-cooled version. VIDHATA has designed this DC alternator incorporating state-of-the-art technologies and all new tooling to meet the increased performance demand for.

• Low Maintenance
• Low EMI Emissions
• Very High Quality Electrical Output
• Light Weight
• Low Fuel Consumption
• Low Acoustic Noise
• High and Low Ambient Operation (-40° to 125° F)

VIDHATA
Power has met these performance goals through an integrated engineering effort involving detailed analysis of engine, voltage regulator, field coil, magnet, stator, rotor system’s output voltage and current.

SPECIFICATIONS

• DC output 12 volts, 200 Amps
• DC Voltage regulated at 1 Volt from no-load to full load
• Dc Voltage will reduce drastically after the load current reaches its rated current & hence protecting generator & Engine from over load
• Seperately Excited, Brushless, Provided with class ‘H’ Insulation, Temp. rise limited to Class F. Suitable for an ambient temperature of 40C
• D.C. Alternator for recharging battery banks. This is not an automotive style alternator because of their poor efficiency
• 200 amps DC for recharging battery banks, DC generator is the most efficient and least cost solution
• Require 5 h.p Prime mover at 1500 RPM ENGINE suitable to make a DC generator
• We can supply complete DC generator close coupled or coupling type both with water cooled and air cooled engines

LOW MAINTENANCE AND HIGH RELIABILITY

• The unique alternator design allows us to turn the engine at low speeds, thereby extending engine life.
• The voltage regulator has automatic governing at high electrical load demands the regulator automatically increases engine RPM; at low loads the engine speed is automatically decreased.
• VIDHATA Power’s alternator has no: brushes, slip rings, There are no alternator parts to wear.
• There are no electronic parts (diodes, etc.) nor electrical connections inside the alternator. There is nothing to short or vibrate loose inside the alternator.
• The alternator is almost impossible to damage electrically. The outputs can be shorted for minutes without damage.
• The output current is monitored by the voltage regulator through a current transducer. The voltage regulator has an adjustable current limit on the output. It is virtually impossible to overload the alternator.
• VIDHATA Power’s alternator should have an life of exceeding 50000 hours
• The engine is protected against: over-temperature, low oil pressure, over-speed, (OPTIONAL).
• The alternator’s rotor is dynamically balanced to improve the engine’s bearing life.

LOW FUEL CONSUMPTION
The VIDHATA alternator has an efficiency of between 75 to 85% versus 55 to 70% for other DC alternators. Consume only 700 gm diesel in 1 hr.

HIGH AND LOW AMBIENT OPERATION

• During starting the regulator keeps the field current off. This feature coupled with the small light weight rotor provides a minimal load on the starter motor.
• For low ambient temperatures (-40° to 10° F) cold starting aids are available.
• The higher alternator efficiency allows the engine to run cooler in high ambient temperatures. The increased alternator efficiency reduces the mechanical load on the engine which then reduces the engines cooling requirement.

ENGINE STYLES

• Diesel Engine: either air-cooled or water-cooled.

VIDHATA DC GENERATORS ARE MORE EXPENSIVE TO PURCHASE THAN AC GENERATORS BECAUSE

• Our alternators uses a high frequency design (360Hz) that reduces weight, size, and greatly improves the quality of electrical power. The high frequency design requires more labor to wind the stator. Typical AC generators are only 50 or 60 Hz.
• The stator has a 6-phase design to also improve electrical quality and the torque ripple on the engine for better fuel economy. The 6-phase design requires more labor to wind the stator. Standard AC generators are only single or three phase.
• The VIDHATA’s DC generator set is optimized to produce a high current, low voltage power output for charging batteries and powering DC loads directly. The AC generator is optimized for a high voltage, low current output and requires an external power supply or battery charger to convert AC into DC. The low voltage, heavy current windings are more expensive to wind.
• VIDHATA’s DC generator is very corrosion resistant. We make extensive use of stainless steel fasteners and coated aluminum materials. Certain components must be constructed of steel due the magnetic properties; here we coat with high temperature coatings and/or Cadmium (CAD) plating. Corrosion resistance is important for installations in marine or humid environments or exposed to agricultural and garden chemicals. This construction is not typical of AC generators.
• VIDHATA uses the very best magnetic wire in an HML grade for a class H rating. This facilitates long life in warm or dusty climates.

Why use DC Generators for Telecommunications, Solar, UPS, Backup, Prime Power.There is not a single universal reason why all applications should choose a DC generator over an AC generator. There are, however, specific reasons for each project or a combination of reasons that favor the DC generator. Some of which include.

APPLICATIONS IN GENERAL (INCLUDING SOLAR/WIND HYBRID, PRIME POWER, AND BACKUP)

• The DC generator system is designed and optimized to deliver the high currents at low voltages required for battery charging and operating DC loads. No battery chargers or power supplies are required.
• DC generators do not require a transfer switch. Transfer switches lower system reliability.
• In prime power applications the DC generator lowers the overall cost of the system.
• Certain AC generators and switch mode power supplies are incompatible. These AC generators have voltage regulators that cannot regulate voltage due to the current pulsing load of the switch mode power supplies. VIDHATA DC generators when connected to a battery do not suffer this incompatibility.
• DC generators are more fuel-efficient. Site operators want the longest run time with the least amount of fuel on site.
• VIDHATA’s DC generators are simpler in design, have considerably less maintenance and are more reliable than AC generators. Propane carburetion and electronic speed governors require frequent calibration and testing. If the propane carburetion, ignition system, or governor speed control should develop a problem, alternator voltage regulation and frequency control will fail. Some equipment powered by the generator will be damaged, other equipment may survive. How many of your AC loads can tolerate a wide swing in frequency?.
• VIDHATA’s DC generators have a current limit control to prevent the alternator from overheating and the engine from stalling during shorts or overloads. This feature is extremely important in battery charging because a battery in a low state of charge can demand more power than the generator or battery charger can manage. VIDHATA’s DC generators will continues to supply power under current limit control, allowing the battery to increase its charge and drop its current demand. The AC generator uses a fuse or circuit breaker to protect against shorts and over current so the battery fails to get charged if it is overly discharged. The additional problem is that for remote sites a person is required to visit the site to replace or reset the fuse or circuit breaker and devise a means where the batteries can be brought to a state of charge where the batteries can take over.
• VIDHATA DC generators can be connected in parallel and load share. Paralleling these small AC generators is not practical. In many projects there are concerns about future site expansion and given load estimates are sometimes understated.
• Maintainability. DC generators use smaller engines that can be lifted by hand and transported to a shop for repair. The high-level generator mechanics are not required, or their expensive travel time to the site.
• AC generators are typically oversized to handle starting currents of motors and to provide light enough engine loads to facilitate speed regulation. Engines that are lightly loaded build up carbon around the valves and exhaust lines (wet stacking) this creates additional engine maintenance.
• DC generators are considerably smaller in size and use smaller horsepower engines. This facilitates both roof mount installations and installations inside the small shelters, as well as the required permit process.
• DC generator lowers the costs to install and operate. It is smaller in size and requires less site support. Transport to the site and installation is facilitated because: smaller shelter and concrete pads can be used, elevator transport to roof rather than crane, smaller helicopters or vehicles for transport. Fuel consumption is lower, so cost to transport fuel to the site is lower (transportation of the fuel to the site can be very expensive).
• Engines need a warm up period before they are able to provide full power, for an AC generator this translates to providing a stable frequency and voltage. VIDHATA s DC generator can deliver power at a reduced level immediately after starting, then switch to full power after warn up. Also a cold engine can exhibit speed fluctuations, which has no effect on VIDHATA ’s DC generators.

UPS SYSTEMS

• VIDHATA s DC generators connect direct to the battery bank so there are fewer problems with on site permitting. Many inspectors and utilities are concerned with isolation of the AC generator from the utility grid. Using a DC generator there should be no questions on isolation from the inspectors.
• VIDHATA s DC generator can provide regulated charging to the battery and is unaffected by the pulse currents of the switch mode inverter.

Generator using its bush less / AVR Alternator technology in 2008. Since then numerous organizations have performed extensive testing on our generators VIDHATA assembles the genset to meet its’ clients requirements by adding the appropriate diesel engine to our DC alternators. The engines are available in either a liquid or air-cooled version. VIDHATA has designed this DC alternator incorporating state-of-the-art technologies and all new tooling to meet the increased performance demand for.

• Low Maintenance
• Low EMI Emissions
• Very High Quality Electrical Output
• Light Weight
• Low Fuel Consumption
• Low Acoustic Noise
• High and Low Ambient Operation (-40° to 125° F)

VIDHATA
Power has met these performance goals through an integrated engineering effort involving detailed analysis of engine, voltage regulator, field coil, magnet, stator, rotor system’s output voltage and current.

SPECIFICATIONS

• DC output 12 volts, 200 Amps
• DC Voltage regulated at 1 Volt from no-load to full load
• Dc Voltage will reduce drastically after the load current reaches its rated current & hence protecting generator & Engine from over load
• Seperately Excited, Brushless, Provided with class ‘H’ Insulation, Temp. rise limited to Class F. Suitable for an ambient temperature of 40C
• D.C. Alternator for recharging battery banks. This is not an automotive style alternator because of their poor efficiency
• 200 amps DC for recharging battery banks, DC generator is the most efficient and least cost solution
• Require 5 h.p Prime mover at 1500 RPM ENGINE suitable to make a DC generator
• We can supply complete DC generator close coupled or coupling type both with water cooled and air cooled engines

LOW MAINTENANCE AND HIGH RELIABILITY

• The unique alternator design allows us to turn the engine at low speeds, thereby extending engine life.
• The voltage regulator has automatic governing at high electrical load demands the regulator automatically increases engine RPM; at low loads the engine speed is automatically decreased.
• VIDHATA Power’s alternator has no: brushes, slip rings, There are no alternator parts to wear.
• There are no electronic parts (diodes, etc.) nor electrical connections inside the alternator. There is nothing to short or vibrate loose inside the alternator.
• The alternator is almost impossible to damage electrically. The outputs can be shorted for minutes without damage.
• The output current is monitored by the voltage regulator through a current transducer. The voltage regulator has an adjustable current limit on the output. It is virtually impossible to overload the alternator.
• VIDHATA Power’s alternator should have an life of exceeding 50000 hours
• The engine is protected against: over-temperature, low oil pressure, over-speed, (OPTIONAL).
• The alternator’s rotor is dynamically balanced to improve the engine’s bearing life.

LOW FUEL CONSUMPTION
The VIDHATA alternator has an efficiency of between 75 to 85% versus 55 to 70% for other DC alternators. Consume only 700 gm diesel in 1 hr.

HIGH AND LOW AMBIENT OPERATION

• During starting the regulator keeps the field current off. This feature coupled with the small light weight rotor provides a minimal load on the starter motor.
• For low ambient temperatures (-40° to 10° F) cold starting aids are available.
• The higher alternator efficiency allows the engine to run cooler in high ambient temperatures. The increased alternator efficiency reduces the mechanical load on the engine which then reduces the engines cooling requirement.

ENGINE STYLES

• Diesel Engine: either air-cooled or water-cooled.

VIDHATA DC GENERATORS ARE MORE EXPENSIVE TO PURCHASE THAN AC GENERATORS BECAUSE

• Our alternators uses a high frequency design (360Hz) that reduces weight, size, and greatly improves the quality of electrical power. The high frequency design requires more labor to wind the stator. Typical AC generators are only 50 or 60 Hz.
• The stator has a 6-phase design to also improve electrical quality and the torque ripple on the engine for better fuel economy. The 6-phase design requires more labor to wind the stator. Standard AC generators are only single or three phase.
• The VIDHATA’s DC generator set is optimized to produce a high current, low voltage power output for charging batteries and powering DC loads directly. The AC generator is optimized for a high voltage, low current output and requires an external power supply or battery charger to convert AC into DC. The low voltage, heavy current windings are more expensive to wind.
• VIDHATA’s DC generator is very corrosion resistant. We make extensive use of stainless steel fasteners and coated aluminum materials. Certain components must be constructed of steel due the magnetic properties; here we coat with high temperature coatings and/or Cadmium (CAD) plating. Corrosion resistance is important for installations in marine or humid environments or exposed to agricultural and garden chemicals. This construction is not typical of AC generators.
• VIDHATA uses the very best magnetic wire in an HML grade for a class H rating. This facilitates long life in warm or dusty climates.

Why use DC Generators for Telecommunications, Solar, UPS, Backup, Prime Power.There is not a single universal reason why all applications should choose a DC generator over an AC generator. There are, however, specific reasons for each project or a combination of reasons that favor the DC generator. Some of which include.

APPLICATIONS IN GENERAL (INCLUDING SOLAR/WIND HYBRID, PRIME POWER, AND BACKUP)

• The DC generator system is designed and optimized to deliver the high currents at low voltages required for battery charging and operating DC loads. No battery chargers or power supplies are required.
• DC generators do not require a transfer switch. Transfer switches lower system reliability.
• In prime power applications the DC generator lowers the overall cost of the system.
• Certain AC generators and switch mode power supplies are incompatible. These AC generators have voltage regulators that cannot regulate voltage due to the current pulsing load of the switch mode power supplies. VIDHATA DC generators when connected to a battery do not suffer this incompatibility.
• DC generators are more fuel-efficient. Site operators want the longest run time with the least amount of fuel on site.
• VIDHATA’s DC generators are simpler in design, have considerably less maintenance and are more reliable than AC generators. Propane carburetion and electronic speed governors require frequent calibration and testing. If the propane carburetion, ignition system, or governor speed control should develop a problem, alternator voltage regulation and frequency control will fail. Some equipment powered by the generator will be damaged, other equipment may survive. How many of your AC loads can tolerate a wide swing in frequency?.
• VIDHATA’s DC generators have a current limit control to prevent the alternator from overheating and the engine from stalling during shorts or overloads. This feature is extremely important in battery charging because a battery in a low state of charge can demand more power than the generator or battery charger can manage. VIDHATA’s DC generators will continues to supply power under current limit control, allowing the battery to increase its charge and drop its current demand. The AC generator uses a fuse or circuit breaker to protect against shorts and over current so the battery fails to get charged if it is overly discharged. The additional problem is that for remote sites a person is required to visit the site to replace or reset the fuse or circuit breaker and devise a means where the batteries can be brought to a state of charge where the batteries can take over.
• VIDHATA DC generators can be connected in parallel and load share. Paralleling these small AC generators is not practical. In many projects there are concerns about future site expansion and given load estimates are sometimes understated.
• Maintainability. DC generators use smaller engines that can be lifted by hand and transported to a shop for repair. The high-level generator mechanics are not required, or their expensive travel time to the site.
• AC generators are typically oversized to handle starting currents of motors and to provide light enough engine loads to facilitate speed regulation. Engines that are lightly loaded build up carbon around the valves and exhaust lines (wet stacking) this creates additional engine maintenance.
• DC generators are considerably smaller in size and use smaller horsepower engines. This facilitates both roof mount installations and installations inside the small shelters, as well as the required permit process.
• DC generator lowers the costs to install and operate. It is smaller in size and requires less site support. Transport to the site and installation is facilitated because: smaller shelter and concrete pads can be used, elevator transport to roof rather than crane, smaller helicopters or vehicles for transport. Fuel consumption is lower, so cost to transport fuel to the site is lower (transportation of the fuel to the site can be very expensive).
• Engines need a warm up period before they are able to provide full power, for an AC generator this translates to providing a stable frequency and voltage. VIDHATA s DC generator can deliver power at a reduced level immediately after starting, then switch to full power after warn up. Also a cold engine can exhibit speed fluctuations, which has no effect on VIDHATA ’s DC generators.

UPS SYSTEMS

• VIDHATA s DC generators connect direct to the battery bank so there are fewer problems with on site permitting. Many inspectors and utilities are concerned with isolation of the AC generator from the utility grid. Using a DC generator there should be no questions on isolation from the inspectors.
• VIDHATA s DC generator can provide regulated charging to the battery and is unaffected by the pulse currents of the switch mode inverter.