Electric Motor Control TRIZ Cases

Real-time junction temperature estimation uses current, switching state, and a thermal model to protect wind turbine converter semiconductors during grid transients.

Selective closing of healthy inverter switching cells limits heating and brake torque after a winding short circuit in electric power steering.

Back-EMF and winding resistance are mapped to verify the connected motor and prevent underpowering or overheating.

Harmonic current shaping adds multiple half-cycle extrema to cut motor current RMS and peak torque without enlarging the converter.

Three-phase modulation with dead-time tuning cuts source-current harmonics, helping power converters meet IEC61000-3-2 limits.

By routing the suppression capacitor through existing control wiring, this case cuts power tool cabling and connectors while maintaining EMI control.

An added current during BLDC motor rotation boosts the signal gap versus stop state, enabling legacy ECU diagnosis without extra wiring or larger motors.

Dual current and voltage monitoring triggers coil and converter isolation to limit short-circuit damage in permanent magnet generators.

Reference-voltage sensing and coordinated power-switch control detect motor open, short, and stall faults quickly in driven and non-driven states.

A nonlinear control difference process stabilizes DC bus voltage during inverter load changes and shortens voltage recovery time.

A sensing circuit tied to two motor control signal lines lets the MCU detect open-line faults and abnormal inputs before malfunctions occur.

Peak amplitude counting in motor current waveforms enables early abnormality detection without costly spectral analysis.

A stalled electric motor generates heat for quiet thermal feedback while sensor-based control keeps motor temperature below a safe threshold.

Temperature-based converter control reduces output voltage at a set rate to prevent overheating and keep power supply output stable.

Dynamic output distribution between normal and failed windings helps a steering motor keep output high while limiting torque ripple.

Bandpass filtering, moving average processing, and lead phase compensation clean resolver signals while preserving peak timing and magnitude.

Condition-adjusted motor current thresholds use pitch, roll, temperature, and voltage to detect door obstructions and prevent injury or damage.

A multilayer conductor-insulator stack improves heat flow to the cooler while preventing semiconductor-to-cooler short-circuits.

Combining DIAG ON and DIAG OFF improves H-bridge detection of low-side and high-side overcurrents to confirm inductive load short circuits.

Speed-based switching from three-, two-, and one-phase commutation enables fast SRM braking with lower current stress and accurate reference position setting.

Motor voltage is mapped to applied force so users can gauge massage pressure accurately without complex mechanical sensing.

Cross-coupled Ud and Uq adjustment based on current error cuts id and iq deviation at high motor speed for steadier torque.

Equalizing output between two propeller-drive motors cuts electrical and thermal load imbalance while maintaining stable shaft rotation.

Torque ripple sensing pinpoints whether a generator short circuit is in the converter unit or stator windings, enabling targeted repair.

A stator tooth provides a stable sensor mounting point near the coil, overcoming winding variation while improving motor temperature detection.

Dual angle sensors and cross-checking with motor control angles detect electric brake failures while avoiding extra parts and signal lines.

Real-time temperature feedback reduces motor current before shutdown, enabling continuous operation and longer service life under overheating.

Different protection element characteristics across motor winding control circuits reduce simultaneous noise failures and keep one system driving.

Pre-measured resolver delay tables replace per-vehicle phase checks, synchronizing command and resolver signals with less time and labor.

Carrier peak and valley current sampling detects early transformer or motor insulation degradation without costly high-speed ringing capture.

Event-driven electronic braking uses motor speed and lifting assembly position sensing to improve fastener driver control and response.

Switchable stator windings keep induced voltage below battery voltage at high speed, preventing uncontrolled generator braking with less hardware complexity.

Dynamic temperature-based power limiting lets power tools keep running under heat stress while avoiding abrupt motor shutdowns.

Three-sensor rotor alignment checks use timestamps and counters to correct stator tooth activation timing and avoid motor control errors.

A Hall-effect sensor and magnetic shuttle let rotary power tools change motor speed without contacts, reducing wear and electrical failure risk.

Switchable analog-front-end gain improves low-current ADC resolution across an isolation barrier without adding ADC cost or feedback lag.

A filter-controlled motor adjusts cable torque by position and phase to deliver safe eccentric loading and personalized resistance curves.

Analog flux sensors built into the PMSM stator detect rotor position directly, cutting external sensor hardware, size, and cost.

Electronic control reconfigures stator pole count in real time, extending efficient motor speed-torque operation without external control hardware.

A rotary switch isolates a failed inverter switching element and reconnects a spare path to keep EPS motor drive operating with fewer components.

Diode-isolated inverter modules reuse braking energy locally, cutting peak power demand and DC supply capacity in carriage transport.

Dual motor-driving modules with monitoring keep an electronic parking brake motor operating after an H-bridge transistor failure.

Motor torque is reduced when cable speed drops within a target motion range, enabling safer spotting during asymmetric strength training.

Zero-cross motor switching enables multiple crushing patterns in a blender while keeping user controls simple and operation adaptable.

Dynamic gain switching across an isolation barrier improves motor current feedback precision over wide operating ranges without a more complex ADC.

A moving contact assembly reverses motor phase sequence in one compact unit, cutting wiring complexity and eliminating interlocking modules.

By comparing rotor flux parameters across spaced intervals with resistance estimation, this case detects demagnetization early without rotor sensors.

Torque-based motor speed adjustment cuts tightening tool heat and power use, extending battery life without sacrificing productivity.

Network wiring powers the PWM regulator at start-up, enabling SMPS operation across wide DC bus voltages while limiting voltage for safety circuits.