Function Rectify1

Calculates voltages and currents behind a half-wave rectifier


Description

The \(Rectify1\) function calculates different voltages and the current behind a Half-wave rectifier with charging capacitor and load resistor.

The voltages in idle and under load, the ripple voltage and the current through the load resistor are calculated.

The drop-out voltage at the diode is taken into account. A value of 0.7 volts is usual for silicon rectifiers.

For the internal resistance of the power source, the resistance of the secondary winding of the transformer is essential. In the heavy current range, the resistance of the connection lines can also play a role. Transformerless circuits usually have a series resistor to limit the inrush current whose value (e.g. 5.6 Ohm) is used as the internal resistance.

As a result, the function returns an object in which the calculated values are contained.


Syntax

Rectify1 (U1, Ri, RL, CL, f, UD) = Record

Symbols of arguments

U1

RMS value of the alternating voltage in volts before the rectifier

 

Ri

Internal resistance of the power source in ohms

 

RL

Load resistance in ohms

 

CL

Charge consensator in Farads

 

f

Frequency of the input voltage in Hz

 

UD

Voltage drop of the rectifier diode

 

Example

If the result is assigned to a variable, the individual values can be accessed via the variable. See the following example.

Results symbols

U2

Open-circuit DC voltage behind the rectifier

 

ULoad

Average DC voltage behind the rectifier under load

 

URipple

Superimposed ripple voltage behind the rectifier in Vss

 

UMax

Maximum peak voltage after the rectifier

 

UMin

Minimum voltage behind the rectifier

 

ILoad

Current through the load resistance in A.