Electric Motor Control TRIZ Cases

Temperature is inferred from actuator winding resistance, eliminating separate sensors to cut installation complexity and avoid heat-related faults.

By measuring phase currents and stator signals at a stable potential, this case enables earlier electric machine fault detection with less data.

Two redundant switch-off paths de-excite the rotor winding and short-circuit the controller output to protect vehicle power supplies from generator overvoltage.

Dynamic thermal models estimate SiC junction and substrate temperatures to detect coolant flow faults and cut motor torque before overheating.

Separate star points let drive and follower coils be controlled independently, sustaining high-speed torque while reducing thermal stress and wear.

By extending PWM on-time in healthy phases after a short-circuit fault, the controller preserves current detection and motor operation.

Timed coil pulses cancel magnet-core attraction to deliver self-starting motor control with high torque, high speed, and lower heat.

Real-time thermal modeling estimates semiconductor junction temperature during grid transients to protect wind turbine converters beyond sensor range.

Two encoders on one PCB use a shared shaft magnet to verify position feedback and trigger reliable staged motor braking.

Residual-based observer control detects propulsor failure and reallocates torque to maintain safe electric aircraft operation and landing.

Uses stored DC link capacitor energy through a converter to sustain low-voltage motor control power without dedicated holdup capacitors.

Adaptive current-rate sensing estimates obstacle stiffness and pinch force to cut false anti-pinch events in motor-driven closures.

Injected current heats stator windings, and the post-heating temperature drop reveals cooling deterioration without extra sensors.

Grid fluctuation feedback adjusts converter active-axis current settings to damp subsynchronous oscillations and prevent generator trips.

Feedback control of stator current vectors damps rotor speed oscillations and shortens sensorless synchronous motor startup.

AC-coupled Hall sensor processing filters noise and battery ripple, enabling accurate motor position sensing with less wiring and PCB area.

Warning severity is set from rotor position and function so electric aircraft can avoid unnecessary emergency landings while flagging critical motor faults.

Dual-path overcurrent detection uses different switch resistances to ignore noise yet shut down fast enough to prevent switching device damage.

A current-limited precharge path and switch manage capacitor charging in a power tool, preventing battery terminal sparks and damage.

Phase change material in a slotless motor stator absorbs coil heat to extend short-duration peak power without adding major weight.

Firmware idles media-handling motors as distributed heat sources to stabilize enclosure temperature with lower power and no added heaters.

A series-coil brushless motor and eccentric pin keep clutch sleeve axial force more uniform, improving dog clutch engagement reliability.

Precomputed current magnitude and angle tables keep synchronous motor field weakening torque-neutral while enforcing flux limits.

Continuous current and load-voltage signals let the controller detect series and parallel arcs without extra hardware and isolate faults.

Current-vector filtering isolates bearing fault frequencies from inverter phase current, enabling early rotating machine diagnosis without full spectrum analysis.

Winding resistance is used as an instant temperature signal, avoiding sensor latency and extra hardware while protecting motors from overheating.

Estimated motor temperature is reset to a safer threshold after abnormal shutdown, preventing burnout from inaccurate restart temperature control.

Opposing torque commands across two winding sets amplify current change, improving electric brake pad contact detection accuracy.

A high-frequency test voltage isolates the failed motor current sensing phase quickly, allowing continued operation on normal phases.

PWM zero-phase voltage control cuts EMI noise while limiting resonance-driven unwanted sound in AC motors used for electric power steering.

Separate star-point coil groups let one winding drive torque and another track rotor speed and position without added sensors or magnet stress.

Motor-current-based voltage limiting lets a DC steering actuator hold target angle and avoid overcurrent under changing watercraft loads.

Roller-to-pad contact detects discrete slide positions in a flexible display, improving state tracking beyond motor or Hall estimates.