Drive Voltage (V)

The voltage applied across the coil at the start of a pulse. It's the primary control over how quickly current builds in the coil. A higher voltage forces current through the inductance faster. This shortens rise time and increases slew rate. Doubling the drive voltage on a given coil roughly halves the rise time and doubles the slew rate. The device's power supply and switching topology set the drive voltage. In capacitor-discharge devices the voltage comes from the capacitor charge level and may be user-adjustable. Increasing drive voltage is one of the most effective ways to fix incomplete pulse buildup (low Pulse Completeness) without changing the coil.