The company's design concept for this product is described as follows: With the simplest wiring, the same space as the traditional star/delta starter, support for both soft start and soft stop features, providing more motor protection of.
The product was introduced at the recent Hanover Fair, which gave a new form of soft-start control for the motor, using a "slope climb to the initial" while maintaining the normal connection of the motor to the mains supply. The voltage-voltage hold-slope ramp to full voltage control strategy overcomes the current surge problem of conventional star/delta starters. This approach effectively eliminates overcurrent during star-delta switching.
At present, in the various industrial fields in the UK, the combination of AC induction motor + star/delta starter is still widely used. Therefore, once launched, SDF has aroused great enthusiasm and concern.
The advantage of a conventional starter is that the voltage applied to the motor controls 58% of the line voltage during start-up. However, the shortcomings of this system are also very obvious.
First, this solution is complex and costly, requiring three contactors and a timing mechanism for contactor switching control. Secondly, there are 6 connecting cables between the motor and the starter, and the installation cost is relatively high. Third, when switching from star to delta below 80% of rated speed, large current and torque ripples will occur. Finally, traditional star/delta starters do not support soft stop features.
In the past, the main reason why soft starter products were difficult to completely replace the star/delta starter was its high price and production time occupied by equipment replacement. Now, using Fairford's SDF soft starter, these unnecessary costs are minimized. Thanks to the identical interface, package and form factor as the star/delta starter, the user can easily replace the SDF with existing equipment.
In addition, the SDF does not require all six cables. For upgrades of existing equipment, the SDF soft starter can be connected to the triangle using the original six cables; for new installations, the delta connection can be implemented on the motor side. In this case, only three cables are required for the motor to connect to the SDF.
The material can be brass, stainless steel, aluminum, phosphor bronze,plastic or even titanium. The customized Worm Gear And Shaft can be made, if you provide with drawing or sample, or even with your thoughts or design. e have the hobbing gear machines DMG mori imported from Germany to guarantee the strict dimensions and tolerances. Also the Hexagon CMM to control the high quality. We have 19-year manufacturing and solutions experiences. The worm gear and shaft can be applied in aerospace,medical,construction,automotive, motors,motorcycles, agricultural machinery, textile machinery, industrial machinery, agricultural machinery, electric tools, air compressor, speed reducer, generators, transport equipment, elevator,toys, lifting appliance, massage chair, sewing machine,washing machines, electric doors, Intelligent Lock and other transmission industry.
Worm Gear And Shaft
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Transmission MFG Inc , http://www.transmissionmfg.com