Current limiting for stepper motors

current limiter

[Ito-Brazil] pointed out N-Labs simple current limiter for stepper motors. A current limiting system will let you run stepper motors at higher speeds, with greater torque and efficiency without overheating. This particular design is meant to improve upon the common L/R and Chopper drivers. It can handle high voltages without using large resistors and is high performance without using expensive ICs.

Comments

  1. qwe123 says:

    You got to be kidding!

    The guy is using linear current source to limit the current. What is new about it? It will work for steppers found in floppy disk drives. What about motors that require few amps per phase? Let’s say a motor with 5A 2V windings. And a power supply of 24VDC. Well, 22V has to be droped across the current source. 22 x 5 = 110W. This circuit has to dissipate 110W per phase while the motor dissipates 10W per phase. Very efficient approach, obviously.

    That is the reason why choppers are used.

    The guy is clueless.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

Follow

Get every new post delivered to your Inbox.

Join 92,427 other followers