Articles About closed loop
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Transverse magnetic flux motors -- also known as step motors -- become Hybrid Servos when you operate them closed loop. This is the same transformation that happens between running a 3-phase synchronous motor from line voltage as opposed to running it closed loop as a brushless servo. In the case of hybrid motors, there are many degrees of what is advertised as "closed loop," and thus significant differences in the performance improvements seen.
Over the many years, there have been many technical papers and articles about which motor is the best. The short and sweet answer is - let's talk about the application. More recently a number of papers and articles have appeared that compared each motor's advantages and disadvantages in generic or specific terms. Many times, the methods used to drive and control these motors are not completely described due to the many control schemes available for use. A few articles focus on just the open loop step motor and the closed loop servo motor advantages and disadvantages in a laundry list format. This article is attempting to "drill down" into the reasons why and to describe how it is done.
The transverse flux permanent magnet motor -- also known as a hybrid step motor or hybrid servo motor -- has a wide range of performances, depending upon how you drive these motors, and whether you operate them in open loop or one of the many variants of closed loop methods you use. In this third installment we will cover some of the many ways to drive these motors, as well as how these choices affect the performance of these motors.
This is the first of a series of articles on permanent magnet transverse magnetic flux motors - AKA step motors. These articles will be covering the development history and the various drive technologies used with these motors - both open and closed loop.
High-speed transit system the dreamwork of ideators or idiots?
It is unlikely the hyperloop will inspire Hollywood to start making films emulating the tried-but-true terror-on-a-train genre - a genre that includes many classics. But somehow titles like - Lady on a Hyperloop, Strangers on a Hyperloop, Murder on the Hyperloop Express, Throw Momma from the Hyperloop, The Great Hyperloop Robbery - just don't work. And you can forget about another venerable train travel tradition - the club car - given that you will probably reach your destination sooner than you can say "Jack on the rocks."
News Items About closed loop
1 Applied Motion Offers Closed Loop Integrated Motors (September 16, 2019)
Applied Motion Products offers StepSERVO Closed Loop Integrated Motors for closed loop servo control of position, velocity and torque res...
2 PI Offers Motion Controller for Closed Loop Systems (March 13, 2013)
PI (Physik Instrumente) LP is offering a new motion controller for closed-loop precision positioning systems.The C-884, 4-axis digital se...
3 H2W Technologies Introduces Closed Loop Linear Stepper Stage (October 1, 2018)
The LSS-016-04-006-01A-ME is one of a new series of low profile linear stepper motor positioning stages that integrates an absolute lin...
4 Voith Turbo Offers Closed Loop Differential Pump (October 1, 2013)
The CLDP (Closed Loop Differential Pump) servo drive is setting new standards in hydraulics: Unlike electromechanical shafts, this selfco...