Comments on: Maximizing the bandwidth of Torque Control http://openservodrive.com/maximizing-bandwidth-torque-control/ Cutting edge without Bleeding edge Thu, 15 May 2025 12:21:32 +0000 hourly 1 http://wordpress.org/?v=4.1.12 By: Mike http://openservodrive.com/maximizing-bandwidth-torque-control/#comment-2637 Wed, 28 Jan 2015 09:47:27 +0000 http://openservodrive.com/?p=1374#comment-2637 I love seeing all this fine tuning, and brilliant finish touches.
I know how much work can go into some seemingly small thing like this, it is appreciated.

]]> By: lubchi http://openservodrive.com/maximizing-bandwidth-torque-control/#comment-2623 Thu, 22 Jan 2015 11:31:53 +0000 http://openservodrive.com/?p=1374#comment-2623 Hi fellows,

that’s great. Really clever and yes – it increases dynamics significantly. Just for example – when I’ve started with VSD-E some years ago I’ve made a test with the same motor using once the VSD-E and then a Hi-End servo driver from a fabulous European company. The test was pretty simple – rotate the motor at max. speed (3000 rpm) in positive direction, then without any ramp with “infinite” acceleration, turn it in opposite direction – there is a jump in the speed setpoint of 6000 rpm. The result was: 11 ms for VSD-E against 14 ms for the other drive. The main reason: VSD-E has a current loop resp. delay of 50 us (20 KHz PWM), the other drive – 62.5 us (16 KHz).
3 ms aren’t much, but that’s why we have chosen the “unknown” VSD-E for this project. The main task there was to realize 8 positionings/second, each one about 1/2 revolution. It works.

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