Magnetic Measurements - Spontaneous Materials
... loop, even for rare earth magnets with high Hci. However, electromagnets are more commonly used, with a typical maximum field of less than 20 kOe. As a result, some samples will not be fully saturated, except externally by a pulse magnetizer, and Hci may not be measured. The test is usually a destru ...
... loop, even for rare earth magnets with high Hci. However, electromagnets are more commonly used, with a typical maximum field of less than 20 kOe. As a result, some samples will not be fully saturated, except externally by a pulse magnetizer, and Hci may not be measured. The test is usually a destru ...
Electrical Measuring Instruments
... ‘Simple’, that is, until we consider that in Ohm’s time, there were no instruments for accurately measuring voltage or current. Furthermore, there were no ‘volts’ and no ‘amperes’, as these units of measurement didn’t exist until nearly thirty years after his death! And, of course, there was no ‘res ...
... ‘Simple’, that is, until we consider that in Ohm’s time, there were no instruments for accurately measuring voltage or current. Furthermore, there were no ‘volts’ and no ‘amperes’, as these units of measurement didn’t exist until nearly thirty years after his death! And, of course, there was no ‘res ...
Title Experiment using variable reactor of rectifier type
... as well as a current limiter. In such a case, the line current monitoring hall sensor’s output and the thyristor gate firing signals are interfaced to a logical control circuit. When the fault current reaches to a predetermined value the gate signals of the thyristors are turned off and the line is ...
... as well as a current limiter. In such a case, the line current monitoring hall sensor’s output and the thyristor gate firing signals are interfaced to a logical control circuit. When the fault current reaches to a predetermined value the gate signals of the thyristors are turned off and the line is ...
Ignition system
An ignition system is a system for igniting a fuel-air mixture. Ignition systems are well known in the field of internal combustion engines such as those used in petrol (gasoline) engines used to power the majority of motor vehicles, but they are also used in many other applications such as in oil-fired and gas-fired boilers, rocket engines, etc.The first ignition system to use an electric spark was probably Alessandro Volta's toy electric pistol from the 1780s. Virtually all petrol engines today use an electric spark for ignition.Diesel engines rely on air compression for ignition, but usually also have glowplugs that preheat the combustion chamber to allow starting of the engine in cold weather. Other engines may use a flame, or a heated tube, for ignition.