Triac dimming circuit diagram
Posted on Mar 28, 2007 5349
As shown for the TRIAC dimmer circuit diagram, working principle is: power, 220V lamp VR4 R19 through C23 charge. Because of two-terminal voltage capacitor is not mutated. char
ging will take some time. the charging time VR4 and R19 size is determined by the smaller charge. sooner. slower. the greater the charge on the C23 when voltage of about 33V to charge when turned on. DB1 controllable. silicon is also conducting thyristor.. after a current flows through the bulb in the bulb lit up. . with the DB1 conducting voltage on C23 is completely let go. DB1 and also will be cut off.. thyristor bulb goes out. they were the same as the beginning of the cycle C23. because time is short persistence of the phenomenon of the human eye, it appears to have been light bulb bright, charge and discharge time shorter. the brighter the bulb, and vice versa. R20 C24 protects SCR. if used on a resistive load can be omitted. If it is used in the inductive load, such as would add to the motor, this circuit can also be used for motor speed control.