Suzhou Firstall Electrical Machine & Technology Co.,Ltd.

1. A PMG with its appropriate regulator can enhance a generator’s transient

performance because it will provide a constant AC voltage input to the

automatic voltage regulator  regardless of the generator’s terminal

voltage.

A synchronous generator is taking its input power from the

generator is termed a shunt excited generator. If the generator’s terminal

voltage is reduced as is seen with transient voltage dips upon the application

of significant block loading or motor starting, the input voltage to the  is

reduced by the percentage of transient voltage dip. This reduction in input

voltage to the reduces its ability to force swift recovery of the generator’s

terminal voltage, and may well impact the generator’s ability to start relatively

large motor loads.

2. A PMG with its appropriate regulator can also provide 300% short circuit

support for ten seconds at 60 Hz, without the addition of current boost/series

boost systems.

When a down stream bolted fault is seen at any generator’s terminals, the

generator output voltage will drop to zero. For shunt excited generators, this

will result in zero voltage input to the , and therefore, the generator may

be unable to force current flow long enough for down stream circuit

interrupters to clear the fault, and the entire electrical system will be shut

down. A PMG excitation support system will continue to provide input power

to the , and provide the excitation necessary to clear the fault.

3. When the load on the generator is nonlinear due to thyrister (SCR) power

supplies such as UPS Systems, variable speed drives, etc., the load may

produce notches on the voltage severe enough to cause misfiring of the

power rectifiers in a shunt excited generator’s . When this occurs, the

generator’s terminal voltage will become unstable.

If the generator is fitted with a PMG, the power input to the  is isolated

from these disturbances, and no voltage unstability will occur.

4. A PMG is constructed with a permanent magnet rotor which has a very strong

magnetic field. This eliminates the need for field flashing which is sometimes

necessary with shunt type synchronous generators.

WH series brushless alternators manufactured with alternators’unique design & technology are ranged from 6.5KVA–1250KVA. It can be commonly queipped with engines from all famous brands in the world. Such as  Perkins  Deutz Lister Petter Volovo  Mtu Man John deer  etc.  And of course with Yangdong Weichai Dongfanghong in demestic. They have been successfully applied in the fields of Mine Construction shipping agriculture railway military oil field telecommunications and refrigerated container etc.

Reliable prformance

Reliable preformance is the major advantage of Firstall  WH series alternators and Leroy somer type alternators .  And this reliablity is based on the oustanding design in every aspect and the strict QC system. The materials and components are all from qualified suppliers we selected from those whose quality is the top best in relative lines as our partner. For example to improve reliability of alternators the UL approved varnished wires are selected  to raise the efficiency and reduce the temperature rising, the cold rolled silicon steel with high magenetic flux density is chosen  to extend the rotation hours the world famous bearing are used and the reliable  is adopted to ensure the stability of ouput voltage as well.

Customer first

customer ’s satisfaction is always our action guide and practice. We devote ourselves to develop products to meet customers requirements instead of simply selling our products. Actually, being an exellent alternators manufacturer and supplier , our products are not always invariable , our engineers develop and design new products for customers too, or we alter and improve our standard design to meet customer s requirements.

Technical support and service

As our guarantee to customers technical support and service is a part of our product. Our professional team and in time service network will ensure you to have a proper technical support and service whenever you need.

Firstall’s packing for our alternators

In today’s time and era, packaging not only protects and preserves the product, but also enhances the product imagery, thus creating a niche brand. Be it a business or an industry, be it food, Pharma, engineering, advertising or travel, packaging is practically an indispensable part of the marketing strategy.

Firstall company, is well-versed and equipped with the technology that reflects world-class packaging to meet your requirements. With the plywood case packing, creative cell and the infrastructure enables us to provide you with consistent quality and better designs for our  alternators.