Variable Motor Speed Control
An alternative to control valves for adjusting fluid flow is to regulate the speed of the machine(s) motivating fluid to flow. In the case of liquid flow control, this would
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Electrical Basics
Motor VFD Drive features
Modern DC and AC motor drives provide features useful when using electric motors as final control elements. Some common features seen in both VSDs and VFDs are listed here: Speed
Motor Control Circuit Wiring
A simple three-phase, 480 volt AC motor-control circuit is shown here, both in pictorial and schematic form. This entire assembly consisting of contactor, overload block, control power transformer, power fuses
Motor Protection Circuits
An essential component of any high-power motor control circuit is some device to detect a condition of excessive overload and interrupt power to the motor before thermal damage occurs. A
How Motor Star Delta Starter Works ?
Star-Delta starter is an electrical motor starting device, generally uses in big size motor to overcome high motor currents during starting. Star and Delta means here 2 separate states of
Electrical Switches Principle & Types
Electromechanical switch – Electromechanical switches have mechanical contacts or relays. These types of switches can control a wider range of current and voltage options. They are not affected by dirt, mist,
Motor Inrush Current Measurements
Why inrush current important ? Inrush current, sometimes known as starting current or locked rotor current in motors, can be four to 10 times higher than a motor’s running current.
Stepper Motor Working Principle
Stepper motors are DC motors that move in discrete steps. They have multiple coils that are organized in groups called “phases”. By energizing each phase in sequence, the motor will
Difference between Stepper Motor and Servo Motor
Stepping Motors and Servo Motors are almost same usage for positioning but are entirely different systems, each with its pros and cons. Many are under the misconception that there are
Basic Principles of Electricity
Electricity Electricity, simply put, is the flow of electric current along a conductor. This electric current takes the form of free electrons that transfer from one atom to the next. Thus,