|Posted on March 22, 2016 at 3:40 AM||comments (43)|
Knowing the truth about VFD operation can simplify the selection process for choose a variable frequency drive.
No matter how commonplace variable frequency drives (VFDs) have become to you, somewhere someone is using one or considering using one for the first time (see Figure 1). Think back to when you first thought about applying one of today's pulse-width modulation (PWM)-based VFDs to an ac motor. Chances are you probably had a few misconceptions about their abilities ...Read Full Post »
|Posted on January 7, 2016 at 9:15 PM||comments (0)|
Stick with your architecture and remember to reuse your code
Every PLC programmer will make a mistake when he or she is writing code. Whether it’s the result of pressure by the customer, lack of coffee in the morning, or simply getting distracted at the wrong time, here are the top five mistakes to avoid.
1. Not sticking to an organized architecture
When a program is first laid out, all of the ...Read Full Post »
|Posted on January 7, 2016 at 9:00 PM||comments (0)|
IEC 61131-3: What’s the acceptance rate of this control programming standard? Ladder diagram remains the simplest and most popular approach for PLC programming, but may not be the most efficient way. Lack of interoperability may be a problem. To learn what languages PLC programmers prefer and to understand the level of awareness and use of the IEC 61131-3 standard for industrial control, Control Engineering surveyed readers as part of a custom research project on behalf of Automation...Read Full Post »
|Posted on January 7, 2016 at 8:35 AM||comments (0)|
|| What Is A Servo?
Servo control, which is also referred to as "motion control" or "robotics" is used in industrial processes to move a specific load in a controlled fashion. These systems can use either pneumatic, hydraulic, or electromechanical actuation technology. The choice of the actuator type (i.e. the device that provides the energy to move the load) is based on power, speed, precision, and cost requirements. Electromechanical systems ar...Read Full Post »
|Posted on January 7, 2016 at 3:05 AM||comments (0)|
When someone ask Why using AC Driives/Inverter/VFD/VSD ???
"AC Drive Efficient"
Process variables, including pressure and flow of gases and liquids, have long been regulated using mechanical clutches, throttles, and adjustable inlet guide vanes. These schemes waste energy, require frequent maintenance, and provide inaccurate control. Adjustable frequency drive control provides more ef...Read Full Post »
|Posted on January 5, 2016 at 3:25 AM||comments (0)|
An ac variable frequency drive must simultaneously control output frequency and voltage to efficiently control the speed of a three phase induction motor.
Frequency controls the motor's speed Common 60Hz induction motors are typically offered at no load speeds of 3600rpm (2 pole), 1800rpm (4pole), and 1200rpm (6 pole). Applying 60Hz to a 4 pole motor will produce a motor speed of 1800rpm at no load. Actual speed at any applied frequency is influenced by motor ...Read Full Post »
|Posted on January 5, 2016 at 1:45 AM||comments (0)|
The word “servo” comes from the Latin word “servus” which means the servant who acts according to his master’s instructions and works faithfully and quickly. To put it simply, servos are devices that conduct follow-up control to a target position and speed. They are good at moving quickly and repeatedly to a target position and are therefore adapted to a wide range of high-speed and high-performance equipments and automated machines used in plants. For example, s...Read Full Post »
|Posted on December 21, 2015 at 1:30 AM||comments (0)|
|Posted on December 17, 2015 at 8:25 PM||comments (0)|
Below are the 111 finalists across 27 categories in the 2016 Engineers' Choice Awards program. Voting will close on Dec. 21, 2015; Winners and honorable mentions will be notified by Dec. 30, 2015.
Details and photos are available for each product. For program FAQs, pleaseRead Full Post »
|Posted on December 16, 2015 at 8:55 PM||comments (0)|
Are you taking care of your motor? Are you avoiding failures? Are you practicing energy efficiency?
Don't suffer from total motion control failure. Check out our roundup of helpful motor articles to make sure your motor measures up.
1. Soft starters bring motors up to speed in a controlled fashion
The u...Read Full Post »