Machinedesign 2459 What They Tell You1 0 0
Machinedesign 2459 What They Tell You1 0 0
Machinedesign 2459 What They Tell You1 0 0
Machinedesign 2459 What They Tell You1 0 0
Machinedesign 2459 What They Tell You1 0 0

MSD 101: Modeling and simulation

May 1, 2000
Motor models can be a great help when it comes to designing the control portion of a motion system

Motor models can be a great help when it comes to designing the control portion of a motion system. The relatively simple construction of motors — copper coils, iron cores, and magnets — readily reduces to an equivalent electrical circuit. In this way, ac, dc, brushed, brushless, and reluctance motors can be represented as a combination of resistors, inductors, and voltage sources. These models can be solved to generate speed-torque curves and to quantify the effect of voltage and current on motor operation. The following analysis applies to brushless dc and permanent magnet type motors.

Questions & Answers

Q. What about running a motor in reverse?
A.
The models here show only the first quadrant of the speed-torque curve. Other quadrants express operating modes such as reverse and “regen,” where an idling motor generates current as it spins down.

Q. Are linear speed-torque curves better?
A.
Depends what you need to do. A motor with linear speed-torque is usually easier to control, especially if you plan on fourquadrant operation. Likewise, if your goal is servo control.

Q. What can a motor model tell me about proper sizing and control?
A.
A lot. From a regulated speed curve, you can determine if the motor has enough speed and torque, and how much voltage and current it will need.

Sponsored Recommendations

NEW Low Profile, Ultra Compact Power Supplies

March 13, 2024
Learn more HERE about Altech's Power supplies!

Altech's Liquid Tight Strain Relifs Catalog

March 13, 2024
With experienced Product Engineers and Customer Service personnel, Altech provides solutions to your most pressing application challenges. All with one thought in mind - to ensure...

Industrial Straight-Through Cable Gland

March 13, 2024
Learn more about Altech's cable glands and all they have to offer for your needs!

All-In-One DC-UPS Power Solutions

March 13, 2024
Introducing the All-In-One DC-UPS, a versatile solution combining multiple functionalities in a single device. Serving as a power supply, battery charger, battery care module,...

Voice your opinion!

To join the conversation, and become an exclusive member of Machine Design, create an account today!