General Considerations Of Motor Control System
The purpose of a motor control application is almost always to regulate one or even more of the engine output parameters, that is, shaft speed, angular position, acceleration, shaft torque, and physical output power. The regulation of temperature at many points in the electric motor is also a repeated objective of motor control systems. Since it’s the technical details of the motor which are being managed by the input electric parameters, the distinct characteristic of the individual piece of equipment – that is, the attributes that relate input energy quantities to output mechanical quantities – are vitally important in the style along with analysis of electronic control. It is therefore customary to treat the command of dc commentator motors separately from that of synchronous along with induction motors. motor control circuit diagram forward reverse pdf of the load and power source will likely affect the nature of the management. The load box represents an incredibly broad idea of load and also is a pure inertia load. The energy supply box is generalized and it is supposed to go over all power or maybe excitation sources called for by the motor, such as the area along with armature power supply in a dc commentator motor.
the materials and Structural characteristics of power semiconductors employed in motor control are far different from those of electromechanical devices, which, as will be expected, result in varying operating and green characteristics. It’s essential to recognize those variations in the design and use of electrical motor control in which the 2 different types of components are utilized in the same setting and are subjected to a similar voltage and current values. The principal differences are generally summarized as follows:
Motors have huge thermal capacities allowing it to experience thermal overloads for period of time measured in minutes. Semiconductors have really short winter time constants; lasting usually less than 1 s. they likewise have poor natural thermal conduction paths and also need heat sinks in more programs.
Today’s overload attributes of the two kinds of products are very different, partially as a consequence of the winter differences just noted. Semiconductor devices have relatively tiny over present-day capability.
Many semiconductors are restricted by the speed of change of recent, as will be explained for thyristors. There is absolutely no equivalent limitation in a motor.
Thyristors are also constrained by a rate of change of voltage characteristics, which is just not an aspect in electric motor operation.
Semiconductor circuits are incredibly susceptible to electromagnetic interference, both inductive and conductive, whereas motors are in virtually no way similarly affected.