Ordinary gensets utilize diesel or gasoline combustion engines that are controlled to run at a fixed speed so that the directly coupled alternator driven by the engine produces voltage with a fixed frequency of either 50 or 60 Hz.
Switched Reluctance Generators (SRG) running the engine at variable speed and using power electronics to convert a variable rotation frequency of the prime mover to a fixed voltage and frequency allows for a more efficient operation of the genset. With advanced gasoline or diesel engines and variable speed technology it is possible to reduce weight by 30-60% or even more thanks to liquid cooling and increase fuel efficiency by up to 30-40% by adjusting the speed of the engine depending of the load. The speed of the engine is controlled via a user interface which allows the engine to run at it most efficient operating point for a given load and ambient thermal conditions. It is also possible to have the engine run where it is most audibly quiet, or at its least-polluting operating point. DC power capacitors of the SR generator make the genset less sensitive to load transients and increase the output voltage stability.
![power conversion components in switched reluctance generator set](https://kaskod.ee/wp-content/uploads/2016/10/1112-1024x482.jpg)
Functional block diagram of power conversion components in switched reluctance generator set
A block diagram of the electronic power conversion system for a genset featuring a switched reluctance starter-generator is shown above. The variable frequency pulses produced by the switched reluctance generator via diodes of excitation system charge capacitor C which stabilizes the output DC voltage and an inverter is used to produce controllable AC voltage with selectable frequency. Bidirectional back/boost converter charges the battery in operating mode and converts the battery voltage during the starting mode.
![Switched Reluctance Generators](https://kaskod.ee/wp-content/uploads/2016/10/IMG_6385-2-255x300.jpg)
![Switched Reluctance Generators](https://kaskod.ee/wp-content/uploads/2016/10/IMG_6522_1-250x300.jpg)
Liquid Cooled Switched Reluctance Generators with integrated sensorless excitation system and inverter.
![Switched reluctance generators for Gen-Sets](https://kaskod.ee/wp-content/uploads/2016/10/IMG_68391-e1480078244446.jpg)
![](https://kaskod.ee/wp-content/uploads/2016/10/IMG_6529-1024x848.jpg)
![](https://kaskod.ee/wp-content/uploads/2016/10/IMG_6527-1024x846.jpg)
Cooling: Liquid, water glycol
RPM range: 1000 – 4500
Sensorless control: New advanced algorithms
Nominal power: 2kW or 5kW or 10kW
Output Voltage: 208Vrms (L-L)/3-phase continuous at 60 or 400Hz or 380Vrms or 400Vrms (L-L)/ 3-phase continuous at 50 or 60Hz
Output Wave Form: Sinusoidal
Total Harmonic Distortion: Less than 3% at full load
Line/Load Regulation: Maximum В± 4% from no load to full load
Output Noise: (20MHz BW): High frequency ripple is less than 500mVrms
Output Overload Protection: Current limiting with short circuit protection. Thermal shutdown with automatic recovery in case of insufficient cooling
System Efficiency: Typically 92% at full load
Operating Temperature Range: -40В°C to +60В°C
Temperature Drift: 0.05% per В°C over operating temperature range
Generator protection class: IP66
Humidity: 5 – 100%
Weight: 11,6 kg (2kW), 19 kg (5kW), 25 kg (10kW)
![Motor control](https://kaskod.ee/wp-content/uploads/2016/10/Drawing-1.jpg)
5kw generator dimension drawings
![IP66](https://kaskod.ee/wp-content/uploads/2016/10/Drawing-2.jpg)