Electric Motor Control TRIZ Cases

Cross-checking user-set, calculated, and sensor torque values improves motor torque accuracy while limiting processing load and bolt damage.

Precomputed d-axis and q-axis current lookup tables simplify MTPA and field-weakening motor control while cutting calculation load and cost.

An integrated brake winding and solenoid stop BLDC rotor freewheeling at power-off while avoiding extra brake hardware and control stress.

Phase voltage and current monitoring detects closed-loop FET short failures in EPS motor drives and stops assist force before unsafe steering occurs.

A current sensor and microcontroller cut pump motor torque or speed when line current exceeds a threshold, preventing breaker trips.

A switchable neutral-point connection lowers winding voltage stress, preserving insulation reliability while shrinking converter size.

Integrated abnormality detection and safety processing in a power supply IC cuts component count and signal-path failure risk in motor inverters.

During normal motor operation, active and reactive power are used to estimate the induced voltage coefficient without rotary auto-tuning.

When road disturbances alter wheel operation, current limits are temporarily relaxed so the motor can deliver torque without sustained overheating.

A switch-resistor path and comparator detect half-bridge faults in motor drives while reducing circuit area and current consumption.

A CFD-derived response surface uses temperature and power data to estimate internal coolant flow in VFD power cells without inaccurate flow sensors.

Weighted current, speed, and load features are merged into a motor health index to predict faults and remaining useful life before downtime.

Using two inline shunts and digital Hall sensors, this case shows how sensored FOC improves brushless power tool motor efficiency and control.

Multiple DC power channels and reconfigurable switching isolate load faults and keep critical engine and aircraft loads powered.

Fault detection switches brake resistor terminals to the neutral point, replacing bulky fuses to cut losses, cost, and response time.

Electric angle monitoring between applied and resulting vectors enables reliable low-speed sensorless BLDC stall detection without extra sensors.

Two current sensors and inverse Clarke transform reconstruct all three phase currents, cutting sensor count while preserving fault protection.

Independent monitoring with auxiliary power detects abnormal drive signals and stops motor output to improve fault safety and reliability.

When road disturbances alter wheel operation, current limiting is relaxed so the motor can deliver torque and maintain vehicle stability.

A gain estimator in the servo amplifier tunes motion and low-order control parameters together, improving response and reducing manual fitting.

When one phase current sensor fails during charging, remaining phases are controlled to keep ripple current within limits and avoid charging interruption.

Q-axis current correction improves sensorless rotor position estimation at low speed and high torque, preventing AC motor step-out.

Integrated magnetic and thermal probes in the stator enable reactive power control to prevent electric machine damage under harmful conditions.

By increasing blower motor waste heat while maintaining airflow, this case heats vehicle cabin air without extra heaters or heat exchangers.

After a coil fault, heating permanent magnets to demagnetize them stops unwanted generation, drag, and heat without shutting down the engine.

A no-zero-vector PWM scheme prevents phase shorting in three-phase motor control, cutting leakage currents, energy loss, and GFI trips.

Startup checks of power and phase-blocking switches let redundant steering ECUs detect faults early and avoid brake torque from abnormal switch states.

Potential phase current waveforms are evaluated by cumulative sound pressure level to cut SRM acoustic noise without sacrificing motor performance.

Voltage sensing across grounded DC feeders detects and isolates faults in impedance-grounded aircraft power systems without current sensors.

Coordinated inverter and harmonic-reducer control cuts AC source harmonics while keeping switching cycles synchronized and interference low.

Temperature and battery feedback shift vibration motor frequency to sustain haptic output while reducing energy use and thermal degradation.

By combining model-following control with differentiated feedforward targets, this case improves motor response while reducing overshoot.

A motor temperature estimate is stabilized by switching frequency-filter equations based on processor load while using wave-based resistance sensing.

Pre-adjusting three-phase modulation waves compensates minimum pulse width limits, preserving fundamental voltage accuracy while reducing harmonic current.

By sensing non-energized phase voltage at an optimum PWM duty ratio, this case improves low-speed sensorless BLDC commutation reliability.

A sub-audible measurement wave estimates voice coil motor temperature from filtered voltage and current, reducing user-perceived vibration and processor load.

Combining an external thermistor with coil-based internal temperature estimation helps restrict vibration before motor overheating causes degradation.

Winding resistance is measured through existing current sensing and high-frequency signal injection, avoiding thermistors while preventing motor overheating.

Rotor-angle current optimization enables AC motor open-circuit fault control without hardware changes, preserving torque and reducing fluctuation.

Piecewise affine flux maps replace complex magnetic models to improve motor control accuracy while cutting DSP computation and memory use.

Coordinating PWM phase between EV motor inverters cuts ripple currents, lowering power loss and intermediate circuit capacitance.

Current-threshold compensation in PWM switching curbs peak motor current, limits harmonics, and protects the converter with fewer switching events.

A comparator-triggered half-bridge driver shorts manual-closing back EMF to ground, protecting vehicle door control electronics without extra PCB space.

Adjusting motor stop position during lock current cuts phase heat concentration while preserving wheel braking force balance.

Two phase-shifted pulse signals raise speed update frequency, improving low-speed opening and closing control accuracy for motorized bodies.

Comparator feedback and phase-angle control limit induction motor startup current, reducing thermal stress and false trips.

Multiple half-bridge coupling modes let one PIM boost, buck, rectify, and invert while shunt sensing improves motor control adaptability.

Edge-timing error processing corrects noise-corrupted gate signals while keeping delay within gate-state retention time for reliable power switching.

Torque is estimated from output power, speed, and electrical loss calculations, avoiding added sensors while keeping implementation practical.