Re: [Emc-users] Current Sensors

2012-11-08 Thread N. Christopher Perry
I really prefer sensors made by these guys: http://www.lem.com These are the sensors used in a number of VVF drives used in high reliability applications. N.C. On 2012-Mar-18, at 13:00, Kirk Wallace wrote: These look pretty handy: http://www.pololu.com/catalog/product/1187 I'm thinking

Re: [Emc-users] Current Sensors

2012-03-18 Thread Peter C. Wallace
On Sun, 18 Mar 2012, Kirk Wallace wrote: Date: Sun, 18 Mar 2012 10:00:19 -0700 From: Kirk Wallace kwall...@wallacecompany.com Reply-To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net To: LinuxCNC Users List emc-users@lists.sourceforge.net Subject: [Emc-users] Current

Re: [Emc-users] Current Sensors

2012-03-18 Thread Kirk Wallace
On Sun, 2012-03-18 at 10:15 -0700, Peter C. Wallace wrote: ... snip Hall effect sensors are one way. They have the advantage of simplicity and not requiring floating power on top of the swited leg. TI makes some nice isolated current sensors (like the AMC1204) current sense resistors

Re: [Emc-users] Current Sensors

2012-03-18 Thread Karl Cunningham
On 03/18/2012 10:00 AM, Kirk Wallace wrote: Current can also be measured with an opamp measuring voltage across a current sense resistor, but I'm worried about a common mode voltage in the hundreds of Volts. Is there away to handle this? You not only have to withstand the CM voltage, you have

Re: [Emc-users] Current Sensors

2012-03-18 Thread Jon Elson
Kirk Wallace wrote: These look pretty handy: http://www.pololu.com/catalog/product/1187 These look quite nice, the price is amazing! They should be fairly fast to respond. Jon -- This SF email is sponsosred by:

Re: [Emc-users] Current Sensors

2012-03-18 Thread Peter C. Wallace
On Sun, 18 Mar 2012, Jon Elson wrote: Date: Sun, 18 Mar 2012 15:41:54 -0500 From: Jon Elson el...@pico-systems.com Reply-To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net Subject: Re: [Emc-users