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Variable Frequency Drives (VFDs) In Motor Control

Variable Frequency Drives (VFDs) In Motor Control

What is the purpose of a variable frequency drive? How do they work? And why would we prefer using VFDs over basic motor starters for heavy loads?


Throwback: A Look at Electric Motors in the Early Days of Mining

Throwback: A Look at Electric Motors in the Early Days of Mining

Take a step back and check out a bit of the history of motors in the mining industry, from driving compressed air to generating various DC and AC voltages for mineral transportation.


Introduction to H-Bridges for Industrial Motor Control

Introduction to H-Bridges for Industrial Motor Control

H-bridge circuits are commonly used to provide current switching capabilities to different electrical components in automated systems like motor control circuits, VFDs, and DC/AC current conversions.


Practical Comparison: Microcontroller vs. PLC for Arc Welding Control

Practical Comparison: Microcontroller vs. PLC for Arc Welding Control

Learn in this detailed analysis about the performance of industrial PLC and a prototyping microcontroller to perform stepper motor motion control for an arc welding automation project.


Understanding the Derivative Term in PID Control

Understanding the Derivative Term in PID Control

We know that PID stands for proportional, integral, and derivative, but have you ever seen exactly how the derivative term affects the final output signal in a motion control system?


Add a Dynamic Braking Resistor to a PowerFlex VFD

Add a Dynamic Braking Resistor to a PowerFlex VFD

Dynamic braking resistors stop motors more quickly by converting the rotational energy, but how do we select the correct one and configure a PowerFlex drive to utilize the resistor effectively?


Hands-On with the Arduino Opta Using OpenPLC

Hands-On with the Arduino Opta Using OpenPLC

Using an Arduino Opta PLC, a few off-the-shelf electrical components, and the popular OpenPLC software environment, automation control concepts can be built on your own test bench.


The Dirty Details of Electrical Power: Line/Load Reactors and Filters

The Dirty Details of Electrical Power: Line/Load Reactors and Filters

Filters and reactors can protect your electrical devices, but what is the difference between these two kinds of devices, and are they supposed to be installed before or after a VFD?


The Science Behind Electromagnets: Induction and Coils

The Science Behind Electromagnets: Induction and Coils

Have you ever disassembled a motor and wondered how it rotates? Throughout this article, we’ll discuss electromagnetic induction and how magnetic fields can be utilized to generate motion.


Basics of Air Motors: Pneumatically Controlled Rotation

Basics of Air Motors: Pneumatically Controlled Rotation

Air motors are common in process industries, mainly used in hazardous areas. This article introduces the features and working principles of air motors and the differences between air and electrical motors.


Marvel Over DC Voltage: Permanent Magnet vs. Field Wound Motors

Marvel Over DC Voltage: Permanent Magnet vs. Field Wound Motors

Since their creation, DC motors have become a part of our everyday lives. In this article, we’ll examine the differences between various types of field-wound and permanent magnet DC motors.


What are ‘Eddy Currents’ and Why Do They Matter to Motors?

What are ‘Eddy Currents’ and Why Do They Matter to Motors?

Electromagnetic devices like motors and transformers rely on electric currents that drive magnetic fields which, in turn, can drive current on their own. That’s not always a good thing.


The Rolling Showdown: Belt vs. Roller Conveyor Systems

The Rolling Showdown: Belt vs. Roller Conveyor Systems

Conveyor systems come in all shapes and sizes, with factors like the drive motor and conveyor style influencing the control method. Join us as we dive into the world of automated conveyance.


Reversing the Rotation of an Industrial 3-Phase Motor

Reversing the Rotation of an Industrial 3-Phase Motor

Many online sources explain how to reverse a 3-phase motor; this article will discuss the electrical principles that define why it works and how the phase relationships determine the rotation direction.


Understanding Hairpin Stators in High-Efficiency Motors

Understanding Hairpin Stators in High-Efficiency Motors

Hairpin motors are becoming popular with electric vehicle manufacturers, but what sets them apart from traditional electric motors? And, if they are so great, why not use them in all applications?


Nidec Releases High-Speed Communications Module for HVAC Drive Systems

Nidec Releases High-Speed Communications Module for HVAC Drive Systems

Nidec’s Control Techniques has launched the SI-BACnet IP add-on module for new and existing HVAC drives to help communicate between devices and create a connected automated building.


Driving DC Motors: Rectifiers vs. Pulse-Width Modulation

Driving DC Motors: Rectifiers vs. Pulse-Width Modulation

Although DC motor technology has a strong legacy, control strategies vary from simple to complex. Designs must consider not just the motor, but also the electrical supply and the environment.


Simple, Cost-Effective I/O: Control Techniques Releases Drive Expansion

Simple, Cost-Effective I/O: Control Techniques Releases Drive Expansion

Expanding motor drives with I/O is a cost-effective way of increasing local control without burdening the control system. Control Technique’s new SI-I/O 24 Plus expands I/O right on the drive unit.


How-To: Servo Motor Control Concepts and Programming

How-To: Servo Motor Control Concepts and Programming

Learn how to control servo motors from a PLC using Allen-Bradley servos and Rockwell Automation’s Studio 5000 using a simple-to-understand method.


Too Much Current! Breaker Curves and Overload Trip Classes

Too Much Current! Breaker Curves and Overload Trip Classes

We know what a circuit breaker is meant to do: stop the flow of electricity in case of a fault or failure. But just like fuses, breakers and overloads respond differently depending on the load.