Electric Motor Control TRIZ Cases

Current polarity inversion and zero-current timing improve motor angle detection during inertial window motion under temperature variation.

Sensor data and AR visualization help monitor motor health while filtering what the driver sees to reduce distraction in electric vehicles.

Residual motor energy is routed into a discharge circuit to shorten brushless motor turn-off time and quickly stop vibration.

Faulty motor phases are identified from sampled current, voltage, and temperature, then switched to standby power devices for safer continued operation.

Neutral-line and winding current checks detect abnormal low-temperature charge-discharge states and trigger power reduction to improve battery safety.

Pulsed control of rail-side energy coils improves moving-unit power transfer while limiting coil heating and supporting position-synced data transmission.

By matching standstill current to brush-commutator positions, this case improves revolution counting and avoids false over-temperature alarms.

Peak current timing during a three-phase short circuit corrects rotor angle errors caused by phase current detection offsets.

Separate DC sources with different grounds let a dual-inverter motor drive avoid common-mode losses and improve voltage use across output modes.

Decoupling interrupt timing from the PWM reference channel cuts CPU load while preserving SVPWM update frequency and motor NVH control.

Using one output-shaft angle sensor plus motor internal signals, this actuator control cuts sensor count while improving position accuracy.

Switching from speed feedback to current feedback at a voltage-based current threshold preserves airflow-pressure performance without overcurrent damage.

Current zero-point feedback shifts position signal phase so BLDC drive voltage stays aligned with rotor position at high speed.

A hollow-rotor motor places induction and synchronous stators on opposite radial sides to raise torque density and spread heat.

Selective inverter switch closure creates circulatory current to hold eVTOL rotors in position without mechanical locks or high energy use.

Dynamic gate-current switching tempers reverse recovery in bridge circuits, cutting through current, ringing, radiation, and power loss.

A current-threshold check detects rotor position before magnetic saturation, enabling reliable sensorless control in smaller power tool motors.

Selective inverter switch closure creates circulatory current to hold an eVTOL rotor position without mechanical locks or high control energy.

A single integrated controller uses a LIN bus to cut seat wiring and keep inter-seat operation working during CAN abnormalities.

A series protection switch lets motor-drive IGBTs cut conduction losses while improving short-circuit withstand and limiting fault current.

Differential pressure tracking predicts motor drive air filter end of life, helping prevent airflow restriction and cooling loss.

Back EMF powers low-side inverter switches during supply loss, enabling active short circuit protection without a backup low-voltage rail.

A three-branch inverter uses separate DC/DC backup power to keep safety control active and force a safe state during high-voltage faults.

Rotating reference frames decouple stator D-axis and rotor field control, reducing cross-coupling in wound field synchronous motors.

Dual-side frequency stimulation and gain-ratio tracking estimate resonance quickly and accurately to reduce vibration in resonant systems.

By adjusting supply current to match load fluctuations, the controller suppresses smoothing-capacitor resonance, heat, and output loss.

Adaptive thresholds in backup motor control prevent false abnormality detection in electric power steering while maintaining safe assist.

Dynamic switching between ASC and freewheeling modes limits inverter overvoltage and switch heating after low-voltage power loss.

Acceleration energy tracking reveals electric motor wear in laboratory systems, enabling real-time predictive maintenance without interrupting throughput.

A deployable non-swiveling auxiliary wheel and speed control logic improve straight-line stability and cornering in patient transport.

A dual speed-rule control scheme suppresses low-speed shaking in opening mobile bodies when sensor targets fall out of detectable range.

Current-based parameter tracking updates motor resistance and inductance as temperature changes, stabilizing output current and reducing heat.

Position-based sampling detects kickback or breakthrough in oscillating machine tools faster than filtered speed monitoring, improving safety.

A DC current check at motor terminals identifies disconnections while the motor is off, helping prevent unstable HVAC operation and component damage.

Linear pre-charge and PWM contactor control help vehicle PDMs reach 95% battery voltage consistently while reducing dissipation.

Real-time sensing adjusts sliding motor speed or stops motion to avoid overcurrent, SMPL, battery stress, and heat in flexible displays.

Cooling fluid temperature is actively adjusted from sensor feedback to limit generator shaft expansion, bearing load, and vibration.

Phase current is derived from half-bridge switch measurements and sector calculations, cutting shunt resistor losses, heat, and parts.

Phase-shifted transformer drive signals spread ripple timing across multiple transformers, cutting primary current peaks and filter size.

Real-time torque sensing lets an extruder drive cut motor torque before overload peaks damage the gearbox, motor, or screws.

Additional stator windings feed induced EMF back through an electronic control unit to lower induction motor current draw and energy losses.

A one-way clutch blocks motor inertia after electronic clutch activation, preventing over-tightening and improving fastening torque accuracy.

Discontinuous PWM keeps a low-side switch conductive for shunt current sensing while cutting inverter switching events, EMC emissions, and acoustic stress.

Real-time temperature sensing lets a circulating pump derate power only when critical components heat up, avoiding oversized worst-case designs.

Intentional high-heat operation exposes weak inverter cooling in elevators, enabling earlier fault detection despite sensor offset or TIM degradation.

A threshold-based detection circuit cuts off the gate driver during inverter faults to protect power tool motors and power electronics.

A cut-off vector guides inverter shutdown until motor phase currents drop below a threshold, avoiding current spikes and oversized capacitors.

An integrated controller coordinates heat engine and motor torque while centralizing protection to cut controller complexity and certification burden.

Dual-inverter startup control positions the rotor while suppressing zero-axis current in phase windings to cut motor loss.