Launch Controller Design
The purpose of a launch controller is to ignite a motor starter, and thus ignite a motor. There are several different kinds of starters, so in designing a launch controller, it is important to know which types it will and will not accommodate.
Nominal resistance is just the resistance of the starter, including its leads. No-fire current is the maximum current that can be passed through the starter (to check continuity) when ignition is not intended. All-fire current is the minimum current that should be passed through the starter when ignition is intended.
| Starter Type | Nominal resistance | No-fire current | All-fire current |
|---|---|---|---|
| Estes Motor Starters | 0.5 - 2 ohms[1] | 1 amp |