Showing posts with label full. Show all posts
Showing posts with label full. Show all posts
Wednesday, August 20, 2014
Precision full wave Rectifier Wiring diagram Schematic
The schema provides accurate full wave rectification. The output impedance is low for both input polarities, and the errors are small at all signal levels. Note that the output will not sink heavy current, except a small amount through the 10K resistors. Therefore, the load applied should be referenced to ground or a negative voltage. Reversal of all diode polarities will reverse the polarity of the output
Since the outputs of the amplifiers must slew through two diode drops when the input polarity changes, 741 type devices give 5% distortion at about 300 Hz.
Precision full wave Rectifier Circuit Diagram
Thursday, August 14, 2014
Single Phase Full wave Controlled Rectifier CKT
In the Given ckt a Single phase controlled Rectifier is shown which is used to control the DC motor speed. This ckt is consisting of four SCR and four Diodes. The DC voltage is supplied to the motor winding through four diodes while the DC voltage supplies to the armature through four Diodes.
In This ckt the motor is controlled through armature voltage, while the field voltage is at a constant value.
In the ckt the SCR 1 & SCR 4 are triggered at same time in first cycle, while in next half cycle SCR 2 & SCR 3 are conduct.
The motor armature receives a continuous or Discontinuous voltage depends on the firing angle of the SCR, Power factor.
In Discontinuous armature current , SCR 1 & SCR 4 are fire at angle α due to which the current flow path is form α to β , as shown in the Fig:
The motor armature receives voltages form α to β, while form β to π + α the motor can’t receive current.
Through this way the speed of a DC motor is controlled.
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