At IDS we receive a lot of technical enquiries regarding inverters. Over the last few months we have addressed a wide variety of these in article form, hoping to give our readers a valuable resource to consult as and when required. The topic of these FAQ articles range from How To Run An Inverter On … Continue reading →
Around 80 percent of maximal torque at 90 percent speed is normally considered an efficient duty point for a motor and drive system. However, a more efficient duty point can be found which could benefit a designer tasked with improving a pump system’s efficiency. If you plot motor ISO efficiency curves for various duty points, … Continue reading →
Extended set of tools bring greater flexibility to fieldbus based connections ABB has introduced a number of features and additional tools that offer the variable-speed drives user more options when connecting drives to fieldbus networks. One of the features is PROFIsafe, the safe version of the fieldbus system ProfiBus. This allows safety signals to be … Continue reading →
Many ABB inverters have a feature called Safe Torque Off or STO, but what is it? Safe Torque Off is a function that prevents the inverter from generating torque in the motor. It ensures that no torque generating energy continues to act on the motor and that the motor cannot be re-started until the STO … Continue reading →
Two PID (proportional integral derivative) controllers, feature in the latest ABB drives, making it easier and less expensive to set up control loops to manage industrial processes. The ABB drive contains two independent PID loops, which can be selected from digital inputs. The addition of the two loops means that instead of simply controlling the … Continue reading →
A range of diagnosis and keypad display features from ABB cuts the time needed to investigate process interruptions in variable-speed drive applications. Drive trips occur to protect the driven machinery from faults that could cause damage and extended loss of production time. The diagnostic features and displays are designed to provide a highly effective set … Continue reading →
If you have a new ABB general purpose drive ACS580 to install you maybe unsure as to how to do it. Below we have outlined a step-by-step guide for this installation: First, safety is essential when doing this so switch off the input power and wait for 5 minutes to ensure there is no electricity … Continue reading →
The motor control platform, direct torque control (DTC) – used extensively in ABB’s variable-speed drives (VSDs) since 1996 – has been greatly improved to bring even higher accuracy in motor speed and torque control, as well as the ability to control more motor types. This fourth generation DTC provides enhanced performance in open and closed … Continue reading →
One of the more difficult relationships to understand with regard to applications using electric motors is that between torque, power and speed. We have all seen the data on a motor nameplate – power, current, speed in rpm and all of the rest. To get to the motor torque we have to convert them into … Continue reading →
The History There has always been a need for variable speed motors; dc motors were the first cheap, simple variable speed motors. They superseded NS motors, Schrage motors and eddy current drives with variator gearboxes trying to inefficiently compete mechanically. The dc motor offered a compact, relatively efficient reliable motor with good speed control and … Continue reading →
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