A motor that follows the repulsion theory is one of the simplest motor that has a field which is composed of a spread winding, stored in spaces, all within an even layer in the stator and also an armature that carries a winding that is scattered and also attached with single piece of commutator. The coiled up stator is responsible for producing the primary field, which is attached to a main source of current supply. Though the framework or the winding of the rotor is not linked up with the main source to the circuit.However, the brushes are arranged at such an angle with a leading flux part which are placed in a specific angle with each other. This is how the circuit is being short-circuited and represented in the fig given below fig. 12.
Fig. 12. Repulsion motor.
- The axis of the brush which is named as BB is attached at an angle which is absolutely at ninety degree angles in the direction at which the flux (stator) is positioned, the e.m.f. has been tempted which is positioned at the rotor till its half. The coiling is precisely balanced but the e.m.f. which induces the other portion.This results in the consequential e.m.f. as zero. Thus, there is an absence of current supply in the windings of the rotor and therefore the resultant torque developed is zero.
- The axis of the brush was positioned in a line parallel in the direction where the flux of a stator is positioned then the e.m.f. gets induced to the other end of the rotor. This gives the maximum current flow as a result. Certainly here hardly any torque is produced because the torque produced at the other end of any conductors of rotor is well-adjusted by each other.
- The axis of the brush creates a specific angle with the flux of the stator which is similar to the figure given, only then a consequential torque will be produced. The concept of torque is basically theoretical, which explains that if the angle which is at 45°, then the inclination angle will have a half value of it.
Thus we can conclude from the above explanations that the rapidity of the repulsion motor is influenced by the position of the brush. Thus the regulation of speed of such machines can be delivered by intensifying the brushes on any movable object that is changeable from its position with the help of a handle that is placed on the armor that is placed at the other end of the motor. Thus if there is the need of remote control, then the handle can be operated with some simple mechanism withbars and balls.
Otherwise, to make the motor bounded, or to control by a remote than a minimum
distance that must be covered, where the regulation of its acceleration may be attained by using a peripheral series resistance which is also provided with an immovable gear for brushes.
- Therefore the rotational direction of the motor is thus regulated by a motor that runs on repulsion mechanism can be easily be altered by swaying the brushes and bring the brushes in such a position that is represented with unexpended lines in Fig. 12.
Atkinson repulsion motor. Atkinson repulsion motor is the alteration of a simple repulsion motor into Atkinson repulsion motor, where the stator meandering contains two windings which are positioned at ninety degree angles with one other and are attatched in series with one another, which is represented in Fig. 13. The most help fulparts found by using this particular method and determine the rotational direction that can be overturned by altering the links of the windings in stator. There is absolutely no need for altering the brushes by merely changing the switch will be enough, and this is represented in the given Fig. 13.
It is also noticeably found that the stator is connected with electricity to the rotor. Thus the reimbursed repulsion motor cannot directly be operated with high-power supply, as it was analogous with the single repulsion motor. In the given Fig. 15 it shows a characteristic speed-torque is shown with the same features for a repulsion motors having a single phase.
Compensated repulsion motor. This compensation repulsion motor can enhance the power of the device, and itis possible only by supplying a supplementary brush set which is also represented in theFig. 14.
Fig. 15. A speed-torque with a repulsion motor of one phase.
Thus the axis of single pair which is named as BB for one set of brushes that overlaps with the coiled stator. The brushes are usually short-circuited and the second pair of brushes, bb is positioned at ninety degrees with the previous one and is linked in a sequence with the coiled stator.
Links of Previous Main Topic:-
- Current Electricity Basic Concepts
- Introduction to Alternating Current
- Introduction Three Phase A C Circuits
- Magnetic Field
- General Aspects
- Elementary Theory of Ideal Transformer
- General Aspects Polyphase Induction Motors
Links of Next Electrical Engineering Topics:-
- Repulsion Start Induction Motor
- Repulsion Induction Motor
- A C Series Motor
- Universal Motor
- Single Phase Synchronous Motors
- Advantages and Applications
- Construction and Working
- 8 1 Introduction
- Types of Servo Motors
- Tachometer Generators
- Characteristics of D C Generators
- Measuring Instruments
- Power Supply System