Monday, June 29, 2015

Circuit Diagram Series Commutated SCR SSS Solar Charge Control

Robotronicdiagram. - Do you want to make solar charger controller based on SCR in this time? We think this circuit diagram from Electroschematics to be your reference to make Series Commutated SCR SSS Solar Charge Control like in figure 1 below.

Circuit Diagram

Figure 1. Circuit Diagram Series Commutated SCR SSS Solar Charge Control
(Source : Electroschematics)

Component Parts
  1. SCR 2N6027
  2. Resistors
  3. MOSFET FCP20N06
  4. SCR S280CA
  5. See all component in figure 1 above


Circuit diagram like in figure 1 above is Circuit Diagram Series Commutated SCR SSS Solar Charge Control. According Electroschematics site describe that A series commutated SCR makes a very unusual Solid State Switch in this solar charge regulator control. Advantages include simplicity and robustness. The SCR performs (3) functions: switch, latch and reverse polarity diode (reverse blocking thyristor). The SCR conducts the charging current from the solar panel to the battery while a series MOSFET performs the function of commutating (turning off) the SCR current at the end of the conduction period. All circuitry consists of readily available discrete components.

Basic operation

Operation is simple –Q1 keeps firing the SCR while the voltage regulator keeps commutating the SCR via turning off the normally conducting MOSFET (Q2). When the SCR is Off, LED D3 is illuminated. When the battery is low, the LED does not light –it lights only when the battery voltage setting has been reached. When the battery is fully charged, the SCR conducts for only a short period of time in each 6sec oscillator period.

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