Description:
TWG Series Three-phase Brushless Synchronous Generator
Introduction:
TWG series three-phase brushless synchronous generators, by introducing and developing on foreign advanced technology of well-known generators, are new developed products. Its body is constructed by steel shell and rotor is made as whole salient pole type with full damping, with brushless self excitation and automatic controlling by AVR. It has follow features: small-size, light-weight, good appearance and perfect performance.
The technical performance and mounting dimension of TWG generators are in conformity with international IEC34-1 and relevant national standard.
Main Performance index:
Four-pole brushless controllable self-excitation, drip-leak-proof (protection class IP22), insulation class H; Full-damping whole salient structure makes the generator to be operated stably in any conditions and enable it to overspeed 2 minutes under 150% rated speed; Adjust rate of stable of voltage ≤ ± 1%, adjusting rate of instant voltage: -15% ~ +20%; Wave aberration rate of voltage THD≤3%, telephone harmony wave factor of telephone THF ≤ 2%, telephone influenced factor TIF ≤ 50.
Generator Features:
Providing invariable excitation on all occasions.
Easy to be connected with power network or other generators.
Balanced rotor with single or two sealed ball bearings.
Convenient installation and maintenenance with easy access to terminals, rotating diodes and coupling bolts.
Wide range of flange adaptor and single bearing coupling disc.
In conformity with all leading standards.
Ambient temperature: -15°C
Altitude: not exceed 1000m
Relative air humidity: not exceed 90%
Electrical character
Excitation system
Auto-voltage regulation (AVR) has more then 3 series, including EA05A, SX460 and SX440 and others.
The main stator provides the exciter stator with the power via AVR. Output power of exciter's rotor is input to that of mains through 3-phase full wave rectifier. Two ends of the rectifier are connected with piezoresistance for surge voltage and avoiding the impact caused by short circuit or parallel synchronization loss. Exciters stator is equipped with permanent magnetic steel. It can make generator starting smoothly in any occasions.
Whole stable voltage regulation is ≤ ± 1%, and SX440 has features of parallel connection, low frequency protection and exterior voltage adjustment, etc.
Voltage regulation
Voltage regulation refers to the change of voltage from no-load to full-load with the power factor ranging from 08 to 1 and 4% fluctuation of the speed of engine. Voltage is adjusted via potentiometer of AVR.
Electrical features:
Insulation
Insulation class H.
All the regulatory components are made up with special materials and also immersed in lacquer by peculiar tech. Varnish and colophony materials are developed to strengthen the processing and machinery intensity of windings and revolving parts for protecting the generator work under corrosive environment.
Windings and electrical features:
All the generator stators are made by high magnetic conductibility energy cold rolling silicon steel plate to fold up, double winding, firm structure, good insulating. Continuous damp windings abate surges. The poles and teeth of the windings are carefully chosen, which helps checking the wave distortion of output voltage.
Phone interference
THF (as defined by BS EN 60034-1 ) < 2%.
TIF (as defined by NEMA MG1-22) <50.
