The dynamic braking resistor absorbs this energy and converts it to heat. Variable resistors osition sensor kit tional non contacting osition sensor er osition sensor linear non contacting osition sensor infinite resolution ariant ufpma uipma 20lhe 357 series p11s 981he kit lmf 534 p16s.
Potentiometers also known as pot are nothing but variable resistors. Variable resistors can be used to adjust circuit elements such as a volume control or a lamp dimmer or as sensing devices for heat light humidity force or chemical activity.
A variable resistor is a resistor in which the electric resistance value is adjustable. Their resistance decreases when the voltage increases. A variable resistor is an electro mechanical transducer that generally works by sliding a contact wiper over a resistive element. The model suggested in step 3 of the solution section uses this equation as part of the simuation model for a thermistor.It is therefore important to check the resistor specification for the temperature coefficient to ensure the particular resistor is suitable for the given application. If you want to derive the equation from known value pairs (T0,R0) and (T1,R1) instead of from the abstract values of K1 and b, the equation reads: R1 1 2 (R0*((R1/R0)^((T0*T1-TEMP*T1)/(TEMP*T0-TEMP*T1))))Īdditional Information How does an RTD resistor behave?Īs temperature increases, its resistance rises according to:Īs temperature increases, its resistance gets smaller according to the R vs. For example, you could include the following model for a 1 kΩ thermistor:
Within the Select Simulation Model step, include a resistor model which reflects the thermistor's behavior.If you have any concerns on how to use de Component Wizard, follow the suggestions in the Creating a Custom Component in NI Multisim tutorial.Generate a new component with the component wizard ( Tools>Component Wizard).To simulate an NTC Thermistor you will need to : You can simulate NTCs in Multisim, but you cannot use the RESISTOR_VIRTUAL as a thermistor because it was designed to behave like an RTD.
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