6/4/2012 12:42 PM | |
Posts: 3 Rating:
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Hello! I'm trying to control torque by using PI controller from Drive Control Charts. The drive is Sinamics S120 CU310DP , the motor is standard 1LA7 induction motor (1.1kW). There is PI controller in Starter that is used for speed control (please see figure 1. in PDF in attachment), but I want to disable it and use the one that I created in DCC instead of it, and that's not a problem. I have enabled [23]Torque control(with encoder) and connect the output from PI controller from DCC to parameter p1503[0] as you can see at figure 4. in PDF in attachment. PI controller in DCC is set up identicaly as PI controller in Starter -> Kp= 3 , Ti = 96ms. Inputs to PI controller in DCC are also identical to inputs to PI controller in Starter -> r1438 as setpoint and r1445 as actual value. Output from PI controller is multiplied with 6.73 to scale the [Nm] to [%] , beacuse 0[%] is equal to 0[Nm] , and 100[%] is equal to 14.85[Nm] by deafoult and is interconnected to parameter p1503[0]. Parameters r1438 and r1445 are "FloatingPoint32" type, is it the same as "Real" type, or I need to use some data conversions? Do you have any examples of using PI controller from DCC charts instead of PI controller from Starter (position, speed, torque)? Every support is wellcome :) Thanks in advance! Matanović Almen AttachmentTorque control using DCC charts.pdf (336 Downloads) |
6/4/2012 11:00 PM | |
Joined: 5/22/2012 Last visit: 3/24/2022 Posts: 895 Rating:
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Hello, I "hope" the following is correct: other motor example: r1438=60 rpm = 1% of r2700 In DCC- chart, the values are interprated as percent values;
Maybe you can test this on your device and post your results (for a test you can change p2000 / p2003 in your project to "my" values). But for a small motor a gain of 3Nms/rad is normally to high - compare to factory setting (this is about 430 * inertia of the motor for SERVO). |
Last edited by: zako_ at: 6/4/2012 11:09 PMLast edited by: zako_ at: 6/4/2012 11:04 PMLast edited by: zako_ at: 6/4/2012 11:02 PM |
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