Single Phase Motor Control TRIZ Cases
- H-Bridge Motor Controller Phase Delay for Reverse Current Control
A timed phase delay lets coil current fully release before switching, reducing reverse flow, overvoltage, and noise in motor drive control.
- Sensorless Single-Phase AC Permanent Magnet Motor Control
A sensorless driving method for single-phase AC permanent magnet motors uses back electromotive force zero crossing detection to determine rotor position.
- Fan Control Circuit for Gas Burner Appliances
Integrating the fan control circuit into the gas burner controller reduces device complexity and manufacturing costs by eliminating separate units.
- Brushless DC Motor Phase Control via Auxiliary Coil Back-EMF
Auxiliary coil extracts rotor position from voltage zero points to enable accurate phase switching without Hall sensors, reducing system volume and cost.