Electric Motor Control TRIZ Cases

A shared protection unit powers and protects multiple control units, cutting enclosure cost while enabling flexible 6U module configurations.

Average-current feedback lowers brushless motor coil current limits under overload, preventing overheating while preserving load response.

High-frequency voltage injection and pulsating torque build a lookup table that corrects standstill angular position errors in sensorless vector control.

A shared changeover switch inside the inverter lets one motor switch Y and Delta winding modes to balance torque, fuel efficiency, and package size.

Harmonics-based point-on-wave control times multi-phase relay armatures to cut arcing, contact wear, and switching variability.

Sequentially energizing three winding paths suppresses motor rotation during resistance diagnosis, improving abnormality detection and user comfort.

High-frequency voltage injection estimates PMSM rotor start position from induced d-q currents, avoiding sensors and cutting error to about ±4°.

Gate-voltage-based temperature sensing tracks IGBT switching heat in real time while avoiding extra terminals and larger chip area.

A calculated rotor position offset keeps the motor unit within a non-critical range at startup, preventing high current flow and unintended gear engagement.

Phase-difference control between current and voltage stabilizes three-phase motor commutation, avoiding Hall sensors, noise, and complex Back-EMF computing.

Repeated component fault checks trigger motor shutdown, safe software state, and error logging to reduce bone and tissue damage.

Switching PWM voltage update modes by vehicle speed cuts electromagnetic noise and microcomputer load in EV motor inverter control.

Disconnecting phase winding return legs from the neutral node isolates PM machine faults while the permanent magnet keeps rotating.

By detecting loaded and no-load states, the controller changes motor speed to cut percussion tool vibration and avoid idle energy waste.

Periodic current-vector variation along a constant-torque line calibrates motor offset angle from encoder speed, reducing torque oscillations.

Differentiated protection elements give master and slave winding control circuits unequal noise resistance, reducing simultaneous failure risk.

Diode-guided voltage holding suppresses cable-induced surge voltage in rotating electrical machines while reducing power loss and resistor heating.

Motor electrical parameters and response velocity are used to estimate reaction force without strain gauges, avoiding downtime and heat-related failures.

Redundant voltage monitoring and dual isolation paths disconnect the generator excitation field to prevent extended overvoltage damage.

Back-EMF zero-crossing feedback adjusts BLDC turn-on and phase transition timing to improve efficiency across motor speeds.

Motor current feedback and hysteresis let a dental handpiece adjust speed to tool load, removing foot pedals and reducing spatter.

Current-based duty cycling helps a vehicle motor clear lock states faster while limiting heat and preserving torque under varying lock currents.

Estimating stator resistance before rotor alignment shortens motor startup and improves stable sensorless operation with less noise and vibration.

Phase-shifted magnetic sensors replace optical encoders to estimate mover position with better dust resistance and a more compact motor.

PWM-induced current ripple is reused as an estimation signal to improve low-speed AC motor control without injection noise or extra sensors.

Heat-flow sensors correct thermal resistance and heat capacity models, improving motor component temperature estimation during operation.

Multiple independent data paths and error codes let a machine tool distinguish noise corruption from real faults and avoid unnecessary motor stops.

Precomputed current and phase-angle tables keep synchronous reluctance motors on the optimal torque path from low to high speed.

PWM bypass switches adapt stator resistance during multi-phase shorting to sustain braking torque as the motor slows.

Current and voltage vector angles provide a rotor position substitute for brushless multiphase motors, improving low-speed start-up and reducing noise.

Using estimated flux as the initial command amplitude smooths switching to flux control, reducing voltage surges and loss of synchronism.

Motor speed and other drive signals are matched to model waveforms to detect screw progress without extra sensors or user adjustment.

A switch-resistor-diode detection circuit identifies shorted series smoothing capacitors in complex power converter capacitor banks.

Sensors detect partial discharges in motor coils, and PWM control is adjusted to limit over-voltage stress and insulation damage.

A coded motor connection lets central electronics identify motor type and power class, then set motor-specific current limits automatically.

Shared current sensing across interleaved boost circuits detects switching-element overcurrent while reducing detector count, size, and cost.

Multiple DC channels and controlled switching isolate faults so gas turbine engine loads like fuel pumps stay powered without disrupting others.

Switching from speed feedback to current-based control limits excess airflow at low static pressure, cutting fan noise and power use.

Correlated motor-condition indices and machine learning detect abnormal resistance or failures early, improving controlled-object reliability.

Pre-start electronic braking stops a coasting brushless motor so rotor position can be detected accurately and restart delay is reduced.

An integrated sensing and bias circuit converts motor drive temperature changes into voltage signals for real-time protection of heat-sensitive components.

By disabling one motor phase at a time and using a Back-EMF observer, this case estimates PMSM d-q axis inductance without precise rotor-angle locking.

Two control-board temperature sensing points estimate motor winding temperature accurately without per-unit resistance calibration or extra motor sensors.

Opposite-polarity voltage pulse pairs detect initial rotor position from stator current response, reducing noise, chatter, and start-up reversal.

PWM commutation timing is used to discard corrupted current segments, improving sensorless AC motor state estimation without extra sensors.

A fourth star-point connection uses voltage sensing to detect winding overheating and rotor blockage with fewer motor connections and simpler control.