Magnet sensors in Welding Equipment
Welding machine power supplies are classified as either Constant Current or as Constant Voltage types. In Constant Current welding machines, the output voltage is varied to maintain a steady current during welding.
For safety, the voltage is usually kept lower before the electrode and the job are brought into contact. As soon as welding starts, the in-built voltage regulator increase the voltage to maintain the current required during welding, but as soon as the welding is completed and when no more current is being drawn, the voltage has to be brought down, and quickly.
The time during which current is being used for welding and the time during which no current is being used can be sensed using special Magnet Sensors strategically located to sense current in the high-current cables. When the welding of the job is completed, and current start dropping, the Magnet Sensor signal triggers the controller which then reduces the voltage to lower levels.
Applications are classified as Position Sensing, Pulse Counting, Electromagnetic or Relay, Temperature Sensing or Magnet Biasing types. This application is classified as follows and the link gives more information on best practices to help select the most suitable AT band and matching magnet.
The Reed Switches and Sensors used in such applications need to be robust, durable and efficient in meeting a high life expectancy. Our engineers work hard in life testing our products under various conditions, and our intention is to ensure end product durability and life. Although we wouldn’t want to restrict any of our products for use in only certain applications, the recommended products for use in this application are listed below.
MS-324 Miniature Flat Pack Reed Sensor with Actuator
|Screw mountable, 4.0 mm slot widths, matching actuator magnet, capable of switching 10 W...Continue reading|