AC Motor Control TRIZ Cases

Segmenting switching devices into groups with different deadtimes manages speed variations, reducing harmonic distortion while maintaining device safety.

Optimized gate width ratio in a double gate IGBT resolves the trade-off between withstand voltage and parasitic diode energization, reducing switching losses.

Metal partition isolates current sensor from reactor heat and leakage flux, maintaining measurement accuracy in downsized power converters.

Modifying voltage source inverter duty cycles within clipping values reduces distortion effects caused by minimum and maximum pulse width limitations.

A motor control device generates distinct power failure detection signals based on varying threshold conditions.

A shift range controller adjusts motor target speed via duty feedback to optimize drive control amounts for precise positioning.

A motor drive system with a bypass contactor and air cooling maintains operation during primary drive failure.

Unscented Kalman filter estimates synchronous generator parameters and states using high-density PMU data for accurate dynamic modeling.

A control apparatus selects switching patterns to balance power conversion efficiency and thermal management in electric source systems.

A signal processing circuit amplifies magnetic sensor signals using a high-pass filter and differential amplifier.

A motor control apparatus adjusts driving current detection timing based on PWM duty ratios to maintain consistent measurement intervals.

Dual processing controllers emulate scaled frequency phase references to lower IGBT junction temperatures without reducing control bandwidth.

A semiconductor device uses overlapping belt-like leads to reduce size while maintaining electrical connections.

Controllers adjust magnitude, phase, and frequency of rotating force vectors to maintain prescribed vibration profiles under changing operating conditions.

Inductance changes from induced secondary currents enable precise positioning while eliminating complex sensor cabling and software outlay.

A PWM control part generates pulses based on carrier signals to ensure timely phase current detection across all phases.

Selective movement inhibitors constrain robot joints to human anatomical limits, resolving unpredictable collisions in confined surgical spaces.

A servo slave unit copies internal statuses between amplifiers to synchronize multiple motors.

Digital majority filtering extracts true zero crossings from brushless DC motor back electromotive force, eliminating ringing noise induced jitter.

Curved stator tooth tips divert rotor flux from high-resistance slot openings, cutting copper losses by 50% despite manufacturing constraints.

A motor control device uses a resonance filter to adjust torque current emphasis.

A coil-free power ripple filter uses grounded conductor cores to shield and dampen electrical disturbances in electric vehicle systems.