Latest Motor Control Circuits Articles

Designing, installing, and maintaining control systems involves a lot of wires. Each wire has a purpose, often indicated…

Designing, installing, and maintaining control systems involves a lot of wires. Each wire has a purpose, often indicated by the color of the insulation. But what are the common colors, and what do they mean?

Many VFDs use digital inputs to control operation, rather than PLC-driven network communications. Learn about 2-wire and…

Many VFDs use digital inputs to control operation, rather than PLC-driven network communications. Learn about 2-wire and 3-wire digital input control schemes for ABB, Omron, Rockwell, and others.

Motor control is accomplished by circuit devices from simple contactors to complex frequency drive systems. Rockwell…

Motor control is accomplished by circuit devices from simple contactors to complex frequency drive systems. Rockwell Automation recently added a host of new features and upgrades to common product lines.

Field-oriented control (FOC), also called vector control, can control 3-phase alternating current motors and brushless DC…

Field-oriented control (FOC), also called vector control, can control 3-phase alternating current motors and brushless DC motors. Read more to learn its advantages, how it works, and its best applications.

Large motors require a circuit to turn on and off. This may be as simple as a single on/off drum-type switch or as…

Large motors require a circuit to turn on and off. This may be as simple as a single on/off drum-type switch or as elaborate as a VFD unit. Learn about some common control circuit designs for typical three-phase motor requirements.

Hosted by IMEngineering West in Anaheim, CA on Feb 7-9, the Automation Technology Expo (ATX) West is quickly approaching.…

Hosted by IMEngineering West in Anaheim, CA on Feb 7-9, the Automation Technology Expo (ATX) West is quickly approaching. Check out some of the innovative factory automation and robotic solutions to be demonstrated on the show floor.

DC motors are an old technology still commonly used in industry. This hands-on article shows how to implement a Count Up…

DC motors are an old technology still commonly used in industry. This hands-on article shows how to implement a Count Up (CTU) counter on an Arduino OpenPLC Simulator to control a low-voltage DC motor.

CUI Devices has expanded its product line of motion and control components, offering a new family of shaft and shaftless…

CUI Devices has expanded its product line of motion and control components, offering a new family of shaft and shaftless potentiometers that come in different varieties with varying resistance ratings.

We are taught that parallel circuits maintain equal voltage across all branch resistors, equally sharing the source…

We are taught that parallel circuits maintain equal voltage across all branch resistors, equally sharing the source voltage. But reality is often far from ideal, and individual devices certainly impact the rest of the circuit.

Programmable Logic Controllers, or PLCs, are designed to receive signals and influence load devices automatically. Learn…

Programmable Logic Controllers, or PLCs, are designed to receive signals and influence load devices automatically. Learn how to connect and program discrete output devices like solenoids, relays, and lights.

Previously, we described how to use the new Arduino PLC IDE to control discrete devices. This tutorial will describe how…

Previously, we described how to use the new Arduino PLC IDE to control discrete devices. This tutorial will describe how to connect various peripheral equipment (VFD and robot) using analog inputs and outputs.

We know that servo motors are found inside machines that rely on precise motion with feedback to verify proper operation,…

We know that servo motors are found inside machines that rely on precise motion with feedback to verify proper operation, but how do they work, and what makes them different from any other kind of motor?

Coil, field winding, rotor, stator, eddy current… When it comes to motors, there are numerous terms that describe the…

Coil, field winding, rotor, stator, eddy current… When it comes to motors, there are numerous terms that describe the theory of operation, but what is inside a 3-phase motor? Take a look, and learn how they work.

Programming languages often include sine and cosine functions. They simplify programming, but consume valuable memory…

Programming languages often include sine and cosine functions. They simplify programming, but consume valuable memory space and computation time. This can be overcome using simple approximations.

In this article, we will take a look at the differences between synchronous and induction motors, as well as the two…

In this article, we will take a look at the differences between synchronous and induction motors, as well as the two types of induction motors: squirrel cage and wound rotor.

Although the are similarities in operating theory, relays and contactors are used in industrial circuits for different…

Although the are similarities in operating theory, relays and contactors are used in industrial circuits for different specific applications, and should not be used interchangeably.

Two common methods exist for driving induction motors with VFDs - linear scalar control, which is often labeled as V/f,…

Two common methods exist for driving induction motors with VFDs - linear scalar control, which is often labeled as V/f, and vector, or field-oriented control, which can be a bit more complex to understand.

Large DC and AC motor drives often provide terminals for installing a braking resistor. What are these resistors, and how…

Large DC and AC motor drives often provide terminals for installing a braking resistor. What are these resistors, and how do they slow down a machine? What hazards and cautions must be considered?

Redundancy and safety are often seen together in industrial safety systems. Safety relays monitor emergency devices to…

Redundancy and safety are often seen together in industrial safety systems. Safety relays monitor emergency devices to switch contacts based on status - but what makes them different from normal relays?