Servo Amplifier Sizing & Tools

First time using Linear Amplifiers? Maybe you are a Mechanical Engineer tasked with selecting the servo amplifier for a precision stage? Are you using another amplifier like a PWM, that’s causing noise or bandwidth problems that you need fixed RIGHT NOW!?!? Try Varedan’s servo amplifier sizing & tools to help. Sometimes you’d just like to automate or offload some of the servo analysis work for a new machine.

Varedan Technologies Engineering Team is here to help!

Getting Started

Varedan wants to make it easy to successfully size and select the right amplifier for your application. Below are a series of tools, application notes and tutorials aimed at simplifying an inherently complicated process. If you are not familiar with the process, a great place to start is on our Frequently Asked Questions page.

Step 1: Understanding your motion profile

The first step in sizing and designing a high-performance motion control system is to generate a motion profile for the load that you want to control. For your assistance with your calculations we have provided you with our, “Smart Motion Cheat Sheet.” The motion profile shows the relationships between time, position, velocity and acceleration of the load.

Step 2: Calculating Peak and Continuous Power

Calculating the peak and continuous power dissipation in a linear amplifier is non-intuitive. To assist you we have Application Notes, tutorial videos and sizing spreadsheets for the four most popular motor types, (linear brushless, rotary brushless, rotary brush-type, and voice-coil). The tools in the section below will help you calculate the values needed to size and select an appropriate amplifier.

Understanding Back-EMF and Torque/Force Constants for 3-Phase Brushless Motors

If you are unfamiliar with Back-EMF motor constants, the tutorial at the right will take you through what you need to know in order to work with our sizing tools. While this example is for a Linear Brushless Motor, it also applies to Rotary Brushless Motors.

Linear Brushless Motors

Application Note

Sizing Linear and PWM Amplifiers Driving a Linear Brushless Motor

Download this application note for detailed instructions on sizing linear amplifiers for linear brushless motor applications.

Linear and PWM Amplifier Sizing for LBM

Sizing Calculator

Sizing Linear and PWM Amplifiers Driving a Linear Brushless Motor

Download this sizing spreadsheet and use the video to guide you through sizing a linear amplifier for your linear brushless motor application.

Rotary Brushless Motors

Application Note

Sizing Linear and PWM Amplifiers Driving a Rotary Brushless Motor

Download this application note for detailed instructions on sizing linear amplifiers for rotary brushless motor applications.

Linear and PWM Amplifier Sizing for RBM

Sizing Calculator

Sizing Linear and PWM Amplifiers Driving a Rotary Brushless Motor

Download this sizing spreadsheet and use the video to guide you through sizing a linear amplifier for your rotary brushless motor application.

Rotary Brush-Type Motors

Application Note

Sizing Linear and PWM Amplifiers Driving a Brush-Type Motor

Download this application note for detailed instructions on sizing linear amplifiers for brush-type motor applications.

Linear and PWM Amplifier Sizing for BTM

Sizing Calculator

Sizing Linear and PWM Amplifiers Driving a Brush-Type Motor

Download this sizing spreadsheet and use the video to guide you through sizing a linear amplifier for your brush-type motor application.

Voice-Coil Motors

Application Note

Sizing Linear and PWM Amplifiers Driving a Voice-Coil Motor

Download this application note for detailed instructions on sizing linear amplifiers for voice-coil motor applications.

Linear and PWM Amplifier Sizing for VCM

Sizing Calculator

Sizing Linear and PWM Amplifiers Driving a Voice-Coil Motor

Download this sizing spreadsheet and use the video to guide you through sizing a linear amplifier for your voice-coil motor application.

Step 3: Fill out and submit application information worksheet

Once you have the required information about your application, simply use our application information worksheet to tell our engineers what you need and we will take the guesswork out of selection the proper amplifier. If you don’t have everything figured out just tell us what you know and we will be happy to assist you with the rest.

Application Information Form

Tell us about your application so we can help you select the right solution.

Use this fillable form to tell Varedan about your application so we can help you select the perfect amplifier for your application. Choose your motor type and access application notes, sizing calculators and videos to assist you. Or just give use call and we can help.