China manufacturer of magnetic ballasts for metal halide flood lights & hps flood lights

The Digital high-pressure sodium lamp electronic ballasts, constant power control of the sodium lamp, the main program flow using event-driven, event-driven from the interrupt service routine; drive an event in the interrupt service routine, each corresponding to the main programthe task of the event is executed, the MPU control unit via this event-driven manner, and controls the respective circuits in the circuit module. The present invention proposes a simple constant control method in place of the conventional PID control method, the procedure is relatively simple, and easy to modify and transplantation, thereby reducing the workload of the program; addition, sodium lamp needs working at constant power state, and the control of the present invention simple methods and procedures, the procedure is less, and thus the general microcontroller high pressure sodium lamp can be achieved closed loop constant power control, and do not need the more advanced chip, thereby reducing the cost of the product.