SCR property only when two-way thyristor between the anode and the cathode K A plus a forward voltage, while controlling between G and the cathode electrode coupled trigger voltage required for the forward, only to be triggered conduction . In this case A, K was low resistance between the conductive state, between the anode A and the cathode K voltage drop of about 1V. After a one-way thyristor controller G trigger even lose pressure SCR C106M, long remained the forward voltage between the anode A and cathode K, one-way thyristor conduction state continues to be in the low resistance. 2P4M SCR controlled rectifier circuit in the plot, it was found within the forward voltage of the thyristor to withstand every half cycle SCR, issued the first time the trigger pulse are the same, that is, the control angle α and guide angle θ are equal, then the single-junction transistor relaxation oscillator exactly how to cooperate with the AC power supply in order to achieve effective control? In order to achieve the rectifier circuit output voltage "controlled", must bear the forward voltage of the thyristor each half-cycle time, flip-flop on a trigger pulse emitted by the same SCR C106D, this way of working with each other, known as the trigger pulse and power synchronization. How can we synchronize? We look at the regulator circuit diagram (Figure 1). Note that, here unijunction transistor relaxation oscillator power is taken from the output of the bridge rectifier circuit full-wave pulsed direct voltage. When thyristor does not turn, the relaxation oscillator capacitor C is charged power, UC exponentially rises to a peak point voltage UP when the unijunction transistor VT conduction, the conduction period of VS, the voltage on the AC load RL and current, at the same time, VS turned down the voltage across the small, forcing the relaxation oscillator to stop working. SCR C106D_ are fertile Electronics (certified) _ SCR Dongguan City is provided by Wal-Electronic Technology Co., Ltd. Dongguan City is Wal-Electronic Technology Co., Ltd. (www.dgmydz.com) (www.dgmydz.com) is Dongguan, FET leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, the maximum limits to meet customer needs. Wal-electronics leader in the positive with the staff warmly welcome all inquiries negotiations to create a positive future Wal-electron better. You can also access (www.dgmydz.com/supply_details_41645395.html), for more information about the company.