In this note, we are going to learn about a topic called “What is Ignitor in Lamp?” and its function in lamps. Welcome to Poly Notes Hub, an one stop solution for engineering notes for diploma and degree engineering students.
Author Name: Arun Paul.
What is Ignitor in Lamp?
An ignitor is an essential component for initiating high-intensity discharge (HID) lamps such as metal halide, high-pressure sodium (HPS), and mercury vapor lamps. Because these lights lack a built-in starter, unlike certain fluorescent bulbs, they must be ignited by an external device.
Types of Ignitors
There are two types of ignitors –
- Superimposed Ignitor
- Semi Parallel Ignitor
Ignitor Function in Lamps
- The ignitor’s primary function is to generate the high-voltage pulse (often between 750V and 5,000V) required to ionize the gas in the lamp’s arc tube. This ionization process permits electricity to pass between the electrodes, resulting in an arc that emits light.
- The ignitor and ballast function together. When the lamp is turned on, the ballast applies electricity to the ignitor, which sends a high-voltage pulse to the lamp to start the arc. Once the arc is formed, the ignitor shuts down and the ballast takes over to control the current flow through the lamp.
Advantages
Below we have listed some advantages of Lamp Ignitors –
- It is provides reliable way to start HID lamps.
- It is increases the lifespan of the lamp.
Disadvantages
Below we have listed some disadvantages of Lamp Ignitors –
- Very sensitive. Some ignitors may fail if subjected to frequent voltage changes or surges.