Chapter 17
... • If the conductor is isolated, the electrons undergo random motion (due to collisions with the atoms) • When an electric field is set up in the conductor, it creates an electric force on the electrons and hence a current • The zigzag line represents the motion of charge carrier in a conductor ...
... • If the conductor is isolated, the electrons undergo random motion (due to collisions with the atoms) • When an electric field is set up in the conductor, it creates an electric force on the electrons and hence a current • The zigzag line represents the motion of charge carrier in a conductor ...
Power Inductors - FP3 Series High Temp Designs
... V = Vin - Vout (voltage across the inductor) dT = On time of drive = Vout/Vin/frequency ∆I = Chosen above to be 20% Calculate the required inductance: L = V * dt / ∆I = (12-5)*(12/5/600k)/(0.2*4.5) L= 4.8 µH Choose 4.7 µH, the nearest standard value Recalculate ripple current at 23% using 4.7 µH ...
... V = Vin - Vout (voltage across the inductor) dT = On time of drive = Vout/Vin/frequency ∆I = Chosen above to be 20% Calculate the required inductance: L = V * dt / ∆I = (12-5)*(12/5/600k)/(0.2*4.5) L= 4.8 µH Choose 4.7 µH, the nearest standard value Recalculate ripple current at 23% using 4.7 µH ...
Ohm’s Law and Electrical Power
... OHM’S LAW “Provided the physical conditions, such as temperature, are kept constant, the resistance is constant over a wide range of applied potential differences, and therefore the potential difference is directly proportional to the current flowing.” ...
... OHM’S LAW “Provided the physical conditions, such as temperature, are kept constant, the resistance is constant over a wide range of applied potential differences, and therefore the potential difference is directly proportional to the current flowing.” ...
Chapter 13 Electricity
... resistance so they carry current easily Some metals have high resistance, so friction causes them to heat up and glow (tungsten wire filaments in light bulbs, toaster wires, Equation for resistance if R=V/ I or resistance =voltage/current (ohms=volts/amps) Si unit of measure is Ohms (Ω). ...
... resistance so they carry current easily Some metals have high resistance, so friction causes them to heat up and glow (tungsten wire filaments in light bulbs, toaster wires, Equation for resistance if R=V/ I or resistance =voltage/current (ohms=volts/amps) Si unit of measure is Ohms (Ω). ...
Electric Heating
... Comparing oven heating Vs dielectric heating of materials of poor thermal conductivity- it should be understood that in dielectric heating, the heat is produced in the material itself; whereas in the oven heating the heat must be conducted from outside to inside of the material, which takes long tim ...
... Comparing oven heating Vs dielectric heating of materials of poor thermal conductivity- it should be understood that in dielectric heating, the heat is produced in the material itself; whereas in the oven heating the heat must be conducted from outside to inside of the material, which takes long tim ...
Thermistors
... Thermistors can be classified into two types depending on the sign of k. If k is positive, the resistance increases with increasing temperature, and the device is called a positive temperature coefficient (PTC) thermistor, Posistor. If k is negative, the resistance decreases with increasing temperat ...
... Thermistors can be classified into two types depending on the sign of k. If k is positive, the resistance increases with increasing temperature, and the device is called a positive temperature coefficient (PTC) thermistor, Posistor. If k is negative, the resistance decreases with increasing temperat ...
MODEL L SERIES
... (Add for -5 circuit only) Resistance Code: First 2 digits are significant. Last digit denotes number of trailing zeros. For "F" tolerance first 3 digits are significant. Fourth digit denotes number of trailing zeros. ...
... (Add for -5 circuit only) Resistance Code: First 2 digits are significant. Last digit denotes number of trailing zeros. For "F" tolerance first 3 digits are significant. Fourth digit denotes number of trailing zeros. ...
Lumped element model
The lumped element model (also called lumped parameter model, or lumped component model) simplifies the description of the behaviour of spatially distributed physical systems into a topology consisting of discrete entities that approximate the behaviour of the distributed system under certain assumptions. It is useful in electrical systems (including electronics), mechanical multibody systems, heat transfer, acoustics, etc.Mathematically speaking, the simplification reduces the state space of the system to a finite dimension, and the partial differential equations (PDEs) of the continuous (infinite-dimensional) time and space model of the physical system into ordinary differential equations (ODEs) with a finite number of parameters.