The commutating plane should be carefully distinguished from the normal neutral plane and from the neutral plane, as shown in fig.
The normal neutral plane and the commutating plane.
In other words, the commutating plane must be more or less in advance of the normal neutral plane as shown in fig.
Careful distinction should be made between commutating plane, neutral plane, and normal neutral plane as defined elsewhere.
Hence, for sparkless commutation, the commutating plane is a little in advance of the normal neutral plane, the lead being measured by the angle between these planes, as stated in the definition.
The angle intercepted by these two planes represents the lead, thus in stating that the brushes have a lead of 6°, means that the angle intercepted by the normal neutral plane and the commutating plane is 6°.
In other words, the commutating plane must be shifted back of the neutral plane in a motor instead of being placed in advance as in a dynamo.
What is the position of the commutating plane with respect to M and S, in fig.
Armature with one brush in position to illustrate the period of commutation and commutating plane.
This may be defined as the angle which the brushes make with the commutating plane as shown in fig.
The angle between the normal neutral plane and the commutating plane.
The latter is called "commutating line" by some writers.
What is the object of the commutatingfield produced by the interpoles?
They provide a separate commutating field of a correct value at all loads and speeds, and their windings are for this purpose connected in series with the armature.
Commutating poles as applied to rotary converters fulfill the same functions as in the more familiar applications to dynamos and motors.
That is, the commutating pole insures sparkless commutation from no load to heavy overloads with a fixed brush position.
Brush shifting devices are not furnished on commutating pole converters.
The application of commutating pole converters is particularly desirable where special requirements such as great overload capacity or large capacity and low voltage enable them to show to the greatest advantage.
The commutating poles are similar in general construction to the main poles.
By definition, a mechanical rectifier is a form of commutator operating in synchronism with the generator and commutating or rectifying the negative waves of the alternating current as shown graphically in figs.
Commutating pole rotary converters for railway service are normally arranged for automatic compounding which is effected by the proper combination of series excitation and inductance between the generator and the rotary converter.
The construction details are substantially the same as for the railway converter, with exception of the commutating poles.
With this method of self-starting, the brushes of a commutatingpole rotary converter must be lifted from the commutator during the starting operation to prevent sparking.
In addition to its peculiarity of giving currents of one direction without the employment of commutating devices, such a machine differs from ordinary dynamos in that there is no reaction between armature and field.
Motor converters are occasionally used on high frequency systems, as their commutating component is of half frequency, and thus permits better commutator design than a high frequency converter.
The dynamo is of the commutating pole type either shunt or compound wound.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "commutating" in a variety of sentences. We hope that you will now be able to make sentences using this word.
