|
|
|
|
|
|
ADVANTAGES OF THE PILOT GENERATOR
Excitation systems of generators including a pilot generator have a more simple and more rational design than the compound excitation systems and provide to the set a larger reliability
DESIGN OF THE PILOT GENERATOR
Magnets : Samarium Cobalt - very stable, high coercive magnetic field
Stability of the voltage in process of time
Stability of the voltage afler a short-circuit
Dismantling without voltage loss : no irreversible demagnetisation
Large number of solutions : pole number, size for the machines
Supplying of the required power to the regulator under any condition of the running of the main generator
MECHANICAL CHARACTERISTICS
Frame, endshields : aluminium, cast iron or steel according the solutions·
Machine with bearings
Mounting : IM 1001 or 3001 or 3601 (low shaft height)
Floating mounting or
Rotor / Stator fitted inside the frame or outside the main generator
Cooling : IC 00, IC 01, IC 0041 or IC 0141
Protection : IP 00, IP 23, IP 44 or IP 55
Insulation class F
Temperature rise class F or B : 100 K or 80 K
Ambient temperature : 40°C or others
According to the required speeds and mounting modes
(Rotor/Stator) : binding of the rotors (magnets) : either metallic or carbon fibre
ELECTRICAL CHARACTERISTICS
maximum economical values Three phase or Single phase
Voltage U eff. <500 V
Power S eff. < 60 kVA
Frequency F <400 Hz
Power Factor : 0 < cos phi < 1
Distorsion < 5% (No-load and Full load)
|
|
|
|
|
|
PRECILEC RADIO-ENERGIE alternators WIND PMG equip with the wind turbine of small power. Our Permanent Magnet Generator charge the battery to ensure the power supply of the isolated places, off-line to an electrical grid local.
ADVANTAGES OF OUR DESIGN
Our design is reliable, simple and compact
Our know-how is the integration of rare earths magnets. They are very stable, with high coercive magnetic field and high specific energy
Stability of the voltage in process of time
No voltage loss even after a short-circuit
Our design allows an optimal output according to the required configuration
Dismantling without voltage loss: no irreversible demagnetisation
Large number of solutions: pole number, size for the machines which allow to consider all your demanding space requirements
Mechanical interface is optimized
Highest power-to-weight ratio
In direct drive without speed multiplier or gear
No maintenance needed for machine without bearings
Maintenance limited to bearings only for machine with bearings
ELECTRICAL CHARACTERISTICS
Maximum economical values
Three phase or Single phase
Voltage U eff. max 500 V (between phases)
Power P mech. max 20 kW
Frequency F max 400 Hz
Power Factor: cos phi 0 < cos phi < 1
Distortion max 5% (No-load and Full load)
Rated speed max 3000 rpm
MECHANICAL CHARACTERISTICS
Cooling: IC 00, IC 01, IC 0041 or IC 0141
Protection: IP 00, IP 23, IP 44 or IP 55
Insulation class F
Temperature rise class F or B: 100 K or 80 K
Ambient temperature: 40°C or others
According to the required speeds and mounting modes (Rotor/Stator): binding of the rotors (magnets): either metallic or carbon fibre
|
|
|
|
|
|
The system consists of a permanent magnet generator and a single phase inverter to be applied to a generating set (with a gasoline engine)
As the application is in the domestic field, the stability and the quality of the generated voltage must grant the correct working and safety of electronic devices, computers, household appliances, etc.
Our aim is to realize a control system that grants a consistent inverter’s output voltage in presence of load variations. By, also, optimizing the engine performances adapting the speed in function of the output load. The fuel consumption and noise are dramatically reduced.
The generator has been realized with one three phase permanent magnet (NeFeBo) machine in order to obtain an high power density and reduced volumes; the stator’s winding is inside while the rotor runs outside.
For the generator’s dimensions see the table herewith enclosed.
The main inverter’s features are:
- Output voltage: 230V -50Hz single phase (60Hz on demand)
- THD: < 2%
- Max. continuous power: 10KW
- Max overload: 30-50% (depending on the engine) restricted in time
- Two of these devices can be linked in parallel to increase available wattage through the generator outlets.
- Performances following ISO8528 (generator-set): G4 / G3 class
|
|
|
|
|
|
The range of STK Permanent Magnet frameless alternators addresses the applications of Wind Turbine generators in low and medium power needing the highest power-to-weight ratio in Direct Drive without gear for matching cost-effective solutions.
Each component of a wind turbine generator and wind turbine alternator requires maximum strength and precision in order to ensure perfect control over the blades.
Main characteristics of wind turbine alternators
Rated power from 200 W up to 99 kW depending on size and rated speeds.
Rated speeds from 80 RPM up to 1500 RPM.
Six overall diameters from 145 mm up to 795 mm.
Internal diameter from 56 mm up to 630 mm.
Various available voltages up to 500 Vac.
Assets of wind turbine alternators
No speed multiplier, no gear
No maintenance
Highest power-to-weight ratio in Direct Drive
Simplification of mechanical design
Easy mechanical interface
Cost optimization
Characteristics of the range of wind turbine alternators
The range of permanent magnet frameless alternators STK includes 6 sizes from 145 mm up to 800 mm available in four different lengths per size and two standard rated speeds
|
|
|
|
