## AB-032 : DC motors – Voltage Vs. Output speed Vs. Torque

The relationship between voltage, torque and output speed is a common topic of discussion between our customers and Precision Microdrives’ sales engineers. The following article aims to discuss and elaborate on the relationship between these parameters and methods of using them together with other resources,

## AB-031 : Vibration Motor Calculators – ERMs and LRAs

Here you will find various calculators for vibration motors to help you specify your motors, or understand various characteristics. This Application Bulletin is updated as more calculators are developed, so you can always find all the tools in one place. Quick Vibe Estimator Originally posted

## AB-030 : Extending Vibration Theory – Displacement and Dissipation

Introduction This application bulletin looks to extend our previous work on the characteristics of vibrations using eccentric rotating mass vibration motors. Based upon the theoretical content found at the end of our product datasheets, we take a closer look at what dictates the magnitude of

## VAB-03 : How Do LRAs Work?

If you are looking for a quick overview of how linear resonant actuators work, then watch our video application bulletin below. Some of the concepts have been discussed in Application Bulletin 020: Understanding Linear Resonant Characteristics, but now you get to everything in action! In addition

## VAB-02 : How Do Vibration Motors Work?

This VAB introduces how ERM vibration motors work, including how they create vibrations and what determines the vibration frequency and amplitude. It draws from our previous AB-004: Understanding ERM Vibration Motor Characteristics. These concepts are much easier to understand when you see everything in motion, so

## AB-029 : Vibration Motors – Voltage vs Frequency vs Amplitude

Overview We’re often asked how to adjust the vibration amplitude or frequency of our various vibration motors. In this article, we’ll look at how simple it is, why it can be useful, and how we can predict the behaviour of a motor using the driving

## AB-028 : Vibration Motor Comparison Guide

Overview One of our most common enquiries is from people all over the world who want to implement vibrations in their application but have never done so before. The following guide will outline the main types of vibration motor, the various options available for each,

## VAB-01 : Introductory Gear Equations

The video below is based on Application Bulletin 024: Introductory Gear Equations. It covers the basics of meshed gears, including how to calculate gearing ratios. We’ve also discussed how to increase the gearing ratio, using compound gears to build a spur gearbox. So check out

## AB-027 : Eccentric Mass Parameters for Vibration Motors

Overview When modelling the response of a system containing an eccentric rotating mass (ERM) vibratory motor, it is important to know the weight of the rotating mass as well as it’s eccentricity (that is the offset of the centre of mass of the weight, as measured

## AB-026 : Sensorless Speed Stabiliser for a DC Motor

Introduction Motor speed is a parameter of a DC motor that is often measured and controlled, usually through additional sensors and with closed loop feedback. This method of speed control requires some form of speed sensor, normally mounted on the motor shaft. Some of our DC motors