1756-PA75 B Standard Power Supply

1756-PA75 B When the overspeed is 10%, the overspeed relay gsj1 acts on the safety circuit and the adjustable gate gates the hoist drum. Thyristor power supply device is mainly composed of two parts, one part is the main circuit, the other part is the trigger circuit. The design of this paper uses kzg type three-phase thyristor power braking system.

1756-PA75 B system for a single closed-loop power braking system, the system block diagram shown in Figure 3, from the figure can be seen speed deviation control and pedal control is “or” relationship, which signal is large, which signal is allowed to pass, that is, the corresponding control mode play a role. Therefore, a single closed-loop control when the driver can foot brake control, and in the foot control, such as hoist overspeed, the closed-loop system can play a role in monitoring and protection.

1756-PA75 B speed feed method is to generate a speed feed signal according to the travel principle. In the mine elevator electric control system, usually the cam plate is given by the method, that is, by the cam plate to control the output voltage of the self-rectifying angle machine. Since the self-aligning angle machine has no sliding contacts, the voltage change is smoother, the work is more reliable, and the maintenance is smaller.