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Video: 4.0.3. Analog Inputs
Last Updated 11 months ago


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TRANSCRIPT

00:00:00

Hello and welcome back. In the previous lesson,  

00:00:03

we ve talked about Analog Output settings. In this lesson, we will talk about Analog  

00:00:09

Input settings and how they can be set up in Typhoon HIL Control Center. 

00:00:14

Some C-HIL applications require feeding analog signals from the controller to the plant emulated  

00:00:19

on the HIL device. Analog inputs in this case may also require scaling, where the voltage levels on  

00:00:25

the analog inputs of the HIL device are scaled to be appropriately represented in the simulation. 

00:00:31

There are different ways in which we can utilize analog inputs in our simulations. 

00:00:38

The first way to utilize analog inputs is by using the Analog Input component.  

00:00:43

The Analog Input component is a Signal Processing component which outputs the  

00:00:48

value that is collected from the HIL device analog inputs to the simulation. 

00:00:53

In its properties, you can set the analog input pin that will receive the signal,  

00:00:57

as well as its scaling and offset. Scaling is referred to as Gain in the component properties. 

00:01:05

The value output from this component in the simulation is given as a sum of the  

00:01:09

value received on the Analog Input pin and the assigned offset, multiplied by the assigned gain. 

00:01:17

The second way we can utilize these inputs is by using Externally controlled current  

00:01:21

and voltage sources. These sources allow for generating voltage or current waveforms in the  

00:01:27

simulation based on the output from a function generator connected to the HIL analog inputs. 

00:01:33

In the Externally Controlled Sources component properties, you can select the specific analog  

00:01:38

input port from which you want to source the signal, as well as its gain and offset. 

00:01:44

Externally Controlled Sources are essentially implemented the same as the Analog Input  

00:01:49

component, but with a few advantages. These components run at the simulation step of the  

00:01:54

circuit solver rather than at the slower rate of signal processing components. Therefore, they  

00:01:59

provide a higher fidelity analog signal. Also, gain and offset parameters can be tuned during  

00:02:05

simulation runtime. This can be done by checking the Model control for gain and offset checkbox,  

00:02:11

which will create an input port that lets you define these values through HIL SCADA inputs. 

00:02:17

In addition to the methods mentioned previously,  

00:02:19

Analog Inputs can also be used in most machine components in our library. 

00:02:26

Here can see an example where an analog input is used to define the load of an induction machine.  

00:02:31

By setting the Load source as SCADA/External, you can use an analog input signal from a HIL analog  

00:02:37

channel as an external torque or speed load. In the properties, you can assign the appropriate  

00:02:43

analog input, as well as define the offset and gain, following the same logic described before. 

00:02:51

Another way in which Analog Inputs can be used in electrical machines is as external resolver  

00:02:57

carrier sources. These settings can be changed in the Feedback tab of the machine properties,  

00:03:02

as shown in the right side.To have resolver signals with an  

00:03:07

amplitude of 1 when using an external carrier signal, you should choose the offset and the  

00:03:12

gain accordingly. As shown in the top example, a sinusoidal signal used to generate an external  

00:03:18

resolver carrier source is fed to the HIL's analog input 1. This analog input signal is  

00:03:24

then scaled to get the resolver signals with an amplitude of 1, as shown in the bottom figure. 

00:03:31

In this session, you learned how to you how you can utilize Analog Inputs and set them up in your  

00:03:36

C-HIL applications. Thank you for watching!Thank you for watching!

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