Electric Motor Control TRIZ Cases

Feedforward current-vector trajectory control short-circuits motor windings quickly while limiting transient current and magnet demagnetization.

A four-half-bridge motor circuit delivers three-phase drive and in-phase coil heating from one topology, cutting size and complexity.

Cross-domain fault detection and redundant reporting enable controlled shutdown of high-power gate drives before faults damage the drive or load.

A stator-mounted magnetic detector and harmonic filtering identify rotor field winding short circuits and estimate fault position with less probe complexity.

Rotor position is derived from current and reference voltage by tracking Back-EMF phase and zero crossing, avoiding sensors and noise issues.

Double-update PWM sets separate switch-on and switch-off harmonic values to cut delay, raise harmonic frequency, and reduce torque ripple.

Hybrid neural ODE models estimate rotor and stator temperatures from operating data, avoiding costly sensors while improving stability.

A load-time-adjusted heat estimate protects electric work machine motors from overtemperature without unnecessary shutdowns.

Mode switching between unity power factor, flux assistance, and overexcitation helps synchronous drives maintain torque and stability at high load angles.

Active converter reference correction damps DC link voltage harmonics from Back-EMF ripple, improving grid compliance and stability.

A surface common mode filter shunts high-frequency line-to-ground currents before they reach downhole ESP equipment, extending run life.

A unified transformer drive circuit delivers isolated gate voltages to multiple switching transistors while cutting motor controller layout complexity and PCB area.

Controlling the d-axis and γ-axis angle difference enables faster motor start and stop while preventing step loss in sensorless drive.

Sequential current-path energization detects winding abnormalities in a three-phase AC motor while suppressing unwanted rotation during diagnosis.

Load-torque feedback raises motor current during rapid torque changes, preventing compressor out-of-synchronization and abnormal stops.

Adaptive PWM control switches carrier frequency and two- or three-phase modulation by speed and torque to protect converters and limit ripple.

By embedding XRAM windings in the stator, the machine stores energy internally and multiplies current without bulky external coils.

PWM dwell-time control enables valid bus-current reconstruction for fail-safe torque limiting in three-phase permanent magnet drives.

Switchable coil stages change BLDC motor Kv to hold torque across speed ranges while improving power density and efficiency.

Variable coolant flow matches BEV power electronics and e-machine heat load, cutting pump power demand and preserving vehicle range.

Constant-voltage output diagnoses power-converter semiconductor degradation from motor current without short-circuit currents, improving diagnostic reliability.

Reverse current sensing lets the control circuit switch off low-side transistors, preventing overheating, abnormal motor rotation, and noise.

A future-command deviation check flags when a camera-guided moving part drifts from target position, helping restore accurate motion.

A phase regulator and estimated position command suppress machine-end vibration while reducing damping-induced response delay.

By shifting drive frequency from measured resonance, the vibration device limits high-temperature output and avoids damage from weakened damping foam.

Measured fan speed is used to balance active and passive resistor-grid cooling, reducing motor wear, noise, and unnecessary toggling.

Pre-installation accelerometer calibration corrects sensor error so powered vehicle doors open and close with smoother, more precise motion.

A single in-line drive-sense circuit drives and senses motor power on one line, enabling real-time rotating equipment regulation.

Speed-based phase-angle switching lets unequal-turn six-phase partial motors match torque at low speed and boost power and NVH at high speed.

State-change capture stores only key motor drive parameters, cutting memory use and avoiding continuous gateway transmission for later failure analysis.

Two signal injections plus DC bias resolve 180° rotor angle ambiguity in salient-pole PM machines without two- or three-phase sensors.

Segmented DC power channels, switching, and current limiting reroute aircraft power during faults to keep critical loads operating.

Phase-voltage feedback with pull-up and divider circuits lets an EPS controller diagnose bridge MOSFET faults at power-on and improve current sampling.

A field-weakening current offsets permanent-magnet flux to reduce commutation angle error and stabilize three-phase EC motor control.

Single-phase current sampling with inductive compensation and filtered dI/dt stabilizes Back-EMF observation in sine-wave permanent magnet motors.

Encoder pulse feedback and speed-based parameters correct LIDAR motor position errors, improving target detection accuracy.

Cyclic motor switching separates current sensing from PWM application, allowing one driver to control multiple motors without mistimed outputs.

Compensates aged rotor position data with velocity feedback to cut latency-driven motor noise and improve low-cost sensor control.

Timed detection of motor position flags step-out and speed abnormalities in X-ray diffraction drives, preserving measurement traceability.

Backward load profiling uses derating curves and output differences to maximize electrical system operation without overheating.

Timed sensor power switching around motor start and stop cuts energy use while preserving monitoring and extending sensor life.

Integrated thermal sensing lets the motor driver adjust PWM duty in real time to prevent overheating and protect circuit reliability.

Residual PMSM kinetic energy is converted into bearing power during outages, enabling uninterrupted levitation and immediate recovery.

Electronic damping connects the actuator motor to a load or disables the DC/DC converter to control aircraft motion during power loss.

PWM absolute lag angle is combined with orthogonal feedback to build a calibration map that improves motor position accuracy and real-time response.

A constant-clutch start-up mode extends protection timing so power tools can reach speed without false anti-kickback shutdowns.

A control circuit switches the motor between battery, LDO, and converter paths to cut parasitic losses while preserving power and battery life.

Bus voltage sampling and low-pass filtering let the controller retune PWM duty cycle, stabilizing motor performance without extra control-loop complexity.

Configurable hardware blocks and MCFS let motor controllers activate only needed functions, cutting excess hardware, cost, and energy use.

Closed-loop power error control adjusts motor braking current during stator preheating, improving power accuracy without extra meters.