Drives that control motor speed such as Variable Frequency Drives (VFDs), AC Drives, and Variable Speed Drives (VSDs) include a...
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Drive Component Overview: SCR Definition and Purpose
Drives that control motor speed such as Variable Frequency Drives (VFDs), AC Drives, and Variable Speed Drives (VSDs) include a rectifier unit, in which the AC voltage is supplied to the drive is converted into DC voltage. In most of these motor drives, this rectifier unit makes use of standard P-N junction diodes (two-layer diodes) to build different types of rectifier circuits like half-wave, bridge, and full-wave rectifiers. However, if high voltage is applied to…
Drive Component Overview: Precharge Board, Definition and Purpose
Drive Component Overview In industrial automation, the term “drive” is often associated with motor drives, which are types of motor controllers described using various terms such as Variable Speed Drives (VSDs), Adjustable Speed Drives (ASDs), Inverter Drives, Adjustable Frequency Drives (AFD), Variable Frequency Drives (VFDs), AC Drives, Variable-Voltage Drives, …etc. However, even though these terms are used interchangeably, they have different meanings depending on the technique used to control the motor speed and the drive’s…
Servo Motor Troubleshooting Guide
A servo motor is a linear or rotary actuator that allows for precise control of linear or angular position, acceleration, and velocity. A typical servo motor system consists of a suitable electric motor coupled to a sensor for position feedback. The motors’ control circuit, which includes the position sensor, provides feedback on the real-time position of the motor shaft. With this feedback, the servo motor can rotate with great precision. But for a servo motor…
VFD Troubleshooting Flowchart
A Variable Frequency Drive (VFD), also known as a Variable-Speed Drive (VSD), Adjustable-Frequency Drive (AFD), Frequency Converter (FC), Adjustable Speed Drive (ASD), Microdrive, AC drive, or an Inverter driver, is an electronic controller used to regulate the rotational speed of induction or synchronous electric motors. The VFD controls motor speed by varying the frequency of the supply voltage being used to power that motor. To practically execute this, a typical VFD system consists of four…
PLC Troubleshooting Flowchart (and Explanation)
Programmable Logic Controllers are ruggedized computers, specially designed and built to operate reliably under harsh industrial environments. A typical PLC system consists of a processor (CPU), programmable memory, power supply, a user-defined program, I/O modules with associated circuitry, and a programming device with the necessary programming software. The programmable memory stores a series of instructions that enable the PLC to perform various control functions like arithmetic computation, relay logic, timing, counting, and sequencing. Essentially, these…
PanelView vs VersaView
VersaView and PanelView are Allen-Bradley operator interfaces from Rockwell Automation, with similar functionalities as Human-Machine Interfaces (HMIs). These graphic operator terminals combine HMI software and hardware to allow users to interact with a controller and the system being controlled. An HMI terminal can vary from a physical control panel with indicator lights and keypad buttons to an industrial PC (IPC) with color graphic displays and which runs a dedicated HMI software. The Allen-Bradley PanelView and…
