Each quarter, Control Design's editors pull together the latest online tools and resources that we can find in a specific topic area and present them here. This installment's topic is motor starters.
SEE ALSO: Motor Starters Don't Slow Down
Soft Starter or VFD?
Motors often require large amounts of energy when quickly accelerating to full speed. Both soft starters and variable-frequency drives (VFD) can be used to reduce inrush currents and limit torque, protecting equipment and extending the life of the motor by reducing motor heating caused by frequent starts and stops. This application note helps readers choose between a soft starter and a VFD. The choice often depends on the application, system requirements and cost, both for initial start-up and over the lifecycle of the system.
Eaton
Know Your Internal Starter Wiring
This Electrical Components video explains motor starter wiring. Electrical control panels are full of motor starters, so knowing how they're internally wired is crucial to understanding motor wiring.
Business Industrial Network
Smart Starter Advantages
Given increasing costs and environmental awareness, energy conservation is a growing concern, and the need for energy efficiency throughout a plant or manufacturing floor is a priority. More attention is being paid to starting methods of motors as a cost savings to the bottom line by controlling the demand charges imposed by the local electric utility company. These savings can be achieved by reducing wasted energy by using just enough energy to start motors. This paper outlines smart starters with multiple start functions, such as soft start, current limit, pump control, slow speed and full-voltage starting. For stopping, a smart starter can perform pump stop, smart motor braking and soft stop. New functionality of linear speed and torque control can be found in the company's fully solid-state starter.
Rockwell Automation
Magnetic Starters Explained
This video breaks down the basic operation of a WEG PESW magnetic motor starter and answers a few user questions from a prior video about this device. Watch this and other videos on the subject.
Temco Industrial Power
Direct Online Starters Explained
Different starting methods are employed for starting induction motors because an induction motor draws more starting current during starting. To prevent damage to the windings due to the high-starting-current flow, we employ different types of starters. The simplest form of motor starter for the induction motor is the Direct On Line (DOL) starter. The DOL consists of a MCCB or circuit Breaker, contactor and an overload relay for protection. Get an explaination of the how they function together.
Electrical Engineering Portal
