Control method for digital high voltage sodium lamp electronic ballast

Abstract

The invention discloses a control method for the digital high voltage sodium lamp electron ballast; when the sodium lamp is executed through the constant power control, the main program adopts the event-driven way, and the event-driven comes from the interrupt service routine; the task of the main program corresponding to the event is executed when each event is driven in the interrupt service routine, and an MPU control unit can control each circuit module in the circuit through the event-driven way. The invention provides a simple constant control method which replaces the traditional PID control method, the program is simpler, and the modification and displacement are easy, so as to reduce the workload of programmers; in addition, the sodium lamp works in the constant power condition; the control method has the advantages that the program is simple, the programs is few, so that a generic single chip can realize the sodium lamp loop closed constant power control without more high level chips, so as to reduce the product cost.

Description

technical field [0001] The invention relates to a control method of a digital electronic ballast, in particular to a control method of a digital high-pressure sodium lamp electronic ballast. Background technique [0002] Digital high-pressure sodium lamp electronic ballast is a power electronic system controlled by MPU. The software running on the single-chip microcomputer controls the normal operation of the electronic ballast. The single-chip microcomputer plays a leading role and directly affects the safety and security of the sodium lamp when it is working. stability. [0003] At present, the general control method adopts sequential drive control. Although the flow structure of this control method is simple, its program is complicated, the readability is poor, and it is difficult to modify and transplant. [0004] In electronic ballasts for high-pressure sodium lamps, closed-loop constant power control is generally adopted. The traditional control method is to use PID c...

AI Technical Summary

Problems solved by technology

[0003] At present, the general control method adopts sequential drive control. Although the flow structure of this control method is simple, its program is complicated, the readability is poor, and it is difficult to modify and transplant.

[0004] In electronic ballasts for high-pressure sodium lamps, closed-loop constant power control is generally adopted. The traditional control method is to use PID control method, but this method has a large amount of programs, which is difficult for general single-chip microcomputers, and requires advanced control chips to complete PID control. resources needed

So it costs more

Images