Abstract
The objective of this study is to demonstrate an experimental work of a DC motor control system using Silicon Controlled Rectifier (SCR) or Thyristor. In this experiment DC motor control system has two kinds of circuits. The first circuit uses two sources, the 12 V DC voltages is connected to universal motor series with a resistor and SCR, while the DC variable voltage source of 0 to 1.5 v is connected in parallel connection with a capacitor and resistor. On the other hand, the second circuit uses a single of 5 V AC voltage source which is connected to the switch and the motor. Thus, the motor is connected to the potentio meter, SCR, diode and capacitor parallel with the AC voltage source. The experimental results shows that the circuit using a DC voltage source will impact the DC motor rotation when the switch of S1 is closed, and the motor will spin faster when the voltage variable is set greater than 0 V then gave the gate current Ig is greater than 400 mA. Furthermore, the DC motor while driven by AC voltage through inserted the diode D3 is used to control the motor rotation, the motor can be stopped by minimizing Rv.
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