V-RING COMMUTATORS

 

V-ring commutators are the most common type of commutator. They are available in a wide range of sizes, from two inches to several feet in diameter. Appropriate to most applications, v-ring commutators can have different riser styles to accommodate different sizes and coil configurations. V-ring commutators are designed with the copper and mica segment pack retained on the inside. The interior of the segment pack assembly is cut in a dovetail, typically using 3° and 30° angles. A steel assembly including a spool for the center and two caps for either end, is then used to retain the segment pack. Matching angles on both caps fit into the cut dovetail angles on the segment pack, (insulated by mica v-rings) forming a clamp which retains the copper bars by exerting pressure on the 30° interior angle.

Dovetail pictured showing  3° and 30° angles.

The seating of the steel caps to this internal angle is critical to stable commutator operation, and sufficient curing is necessary to allow for the differential expansion of the steel to the copper. This curing helps insure that the segment pack does not loosen in operation. V-ring commutators closed with a nut at the outboard end are normally seen in a range of 2" to approximately 12". Larger units use bolts to secure the steel. Sample torque values for use in tightening these units during maintenance can be found in the Motor Fax section of this site.
O.D:1500MM
I.D: 450MM
H:45MM

 

Carbon commutators are a relatively new product used in automotive fuel pumps which also have great potential for use in other applications. Oriental Commutator Company provides customers with a variety of designs and industry leading technical support. Our carbon commutators offer these advantages:

• Resistance to aggressive fuels which attack conventional copper commutators
• Reduced draw on vehicle's electrical system
• Reduced radio frequency interference (EMI)
• Possible to produce a vehicle and ship it globally without concern of fuel pump failure due to corrosive fuels

Size:
O.D: 15.5MM
I.D.: 4.5MM
H:3MM
The Shell type commutators are applied in home electrical appliance,such as mixer,cutter,sander,power tools etc.
Welcome inquiry for more spec:
Materials: 0.03% Silver copper, Resin.V-Ring commutators are applied in big type pump motor or special use etc.
Technical specification
1.    Molded resin has smooth surface, must be free from dented, cracks or any other flaw.
2.   Spin test: , 3500r/min at 180ºC for 60 second, radial movement  <0.01, bar to bar <0.003.
3.    High voltage test: bar to shaft at 1500V for 30 second, bar to bar at 550V for 1 s.
4.    Insulation test at 500V, 50MΩ Min
5.    Copper material: sliver copper or electrolytic copper or customized
6.    Dimension: from OD 2mm to OD 250mm. Customized commutator is available.
7.    Application: automotive industry, power tools, home electronic appliances, and other motors
8.    Commutator type: hook type, riser type, shell type or planar typeEach V-Ring commutator will be made as official drawing of client