White Papers, Catalogs, Case Studies and Resources for Engineers and Professionals
When selecting a brush DC motor for an application, there are several basic motor physics principles to consider to produce a safe, well-functioning, sufficiently-powered precision drive system. In this guide, we’ve provided important methods, formulas & calculations to determine power output of a coreless motor, the speed-torque curve, the current and efficiency plots, and more to help estimate motor performance.
Download the white paper from MICROMO to learn more.
Considering a coreless DC motor for your next application? Can’t decide between brush and brushless? Despite their simplicity, selecting a small DC motor for an application can still be a daunting task. This white paper provides an overview of different DC motor technologies and what to consider for implementation.
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Feedback is used in closed loop systems in applications across all markets to control speed and/or position, and it has an important role in keeping equipment operating smoothly and accurately. This guide provides an overview on open and closed loop systems, hall sensors, and also covers encoder options, resolvers, and more.
While stepper motors are an excellent solution for many applications, a key concern is step losses. However, in most instances step losses can be prevented or corrected. It is important to remember that a stepper motor does not operate like a DC motor. There is no working point parameterization, and the phase current does not increase to overcome variations of load. As long as the speed vs. torque requirement of the application is within the specs of the motor, no problem will be encountered. This white paper provides guidance to determine step losses or non-operation across a variety of applications.
If an application requires high speed, quiet operation, low EMI and longevity, then brushless DC technology (BLDC) might be what you’re looking for in a motion solution. While Brushless DC motors have an overwhelming number of advantages, there are also a few counterpoints to be aware of before making the commitment to go brushless. This quick guide breaks down advantages of brushless technology, cost (versus a brush DC motor), and how to determine the ideal motor type for a particular application.
Some of the recent research activities in the area of electric motor drives for critical applications (such as aerospace and nuclear power plants) are focused on looking at various fault tolerant motor and drive topologies. After discussing different solutions, this paper focuses on a miniature PM stepper motor design which falls in this fault tolerant category by providing an increased redundancy.
Considering a coreless DC motor for your next application? Can’t decide between brush and brushless? If your application demands a reliable, time-tested, low cost motor, then brushed DC motor technology may be the ideal solution. This white paper provides an overview on the advantages and disadvantages of both motor types, and how to determine if brush DC motors are the best option.
Brushless motors are used worldwide for its’ basic benefit that optimizes performance per package size – – no other technology can match it. In addition, brushless brings tremendous advantages to many applications, combining the best features and benefits of past successful designs while incorporating unique advantages.  |
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| The lure of Microstepping a two-phase stepper motor is compelling. Visions of Microstepping a 1.8-degree hybrid stepper motor with 256 microsteps per full step flash in your mind. The resolution of 51,200 microsteps per revolution entices you. You’re glad you don’t own stock in high-resolution encoder companies. Where’s the catch? The real compromise is that as you increase the number of microsteps per full step the INCREMENTAL torque per microstep drops off drastically. Resolution increases but accuracy will actually suffer.   |
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Worldwide applications use feedback for speed and/or position control. Feedback’s important role in the machine is to make sure that the machine delivers performance, precision, and accuracy. The following presents guidelines on how to select feedback for an application.
A feedback sensor must be capably of measuring the correct control variable ie speed, direction, position, with sufficient resolution. In general, guidelines suggest resolution 10 times higher than the specified accuracy of the variable being monitored. Feedback is usually mounted on the motor; however some applications use feedback directly on the load. This introduces mechanical play and dead times. A high quality control should be used to allow for compensation of these potential situations.