Ac Motor Stoppers TRIZ Cases
- Elevator Drive Back-EMF Braking for Brake Failure Control
When a machine brake fails or is overloaded, converter switches and a short-circuiting module dissipate back-EMF to hold elevator speed and position.
- Three-Phase Motor Braking via Multi-Phase Current Reversal
Reverse current between selected motor phases enables precise braking and prevents abnormal fan backspin when a fan is removed.
- Motor Drive Shutoff Architecture for Driver-Independent Fault Detection
Separating shutoff and speed-based diagnosis from the driver circuit enables motor fault detection and stop across varying driver specifications.