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.

A motor control device calculates instruction speed using torque data to maintain target airflow.

Segmenting armature windings with MOSFETs eliminates surplus generation during generator mode, reducing power loss and improving fuel efficiency.

A power source system uses a step-up unit to route low-voltage battery energy to the traveling motor.

Voltage sampling during PWM cycles replaces high-frequency injection, stabilizing low-speed control and reducing noise.

Positioning magnetic sensors at different locations along the moving direction prevents external disturbances and ensures accurate position detection.

Inserting control signal terminals into an insulating block surrounding the power element reduces footprint while maintaining vibration resistance.

A control device calculates stator and rotor losses including harmonic components to improve electric motor temperature estimation accuracy.

A motor driving controller switches between rectangular and sine wave signals based on rotor position detection.

A power converter divides battery voltage via series capacitors to fix the cooler potential, stabilizing surge waveforms on creepage surfaces.

Segmenting windings into separate groups eliminates insulator requirements by preventing voltage phase differences during high speed operation.

A motor driving device samples phase current during specific PWM signal states to ensure accurate direction detection.

Integrating three drive trains into one circuit reduces technical complexity while maintaining functional reliability across all operating states.

A segmented waveform converter adjusts engine speed while maintaining constant output frequency through synchronous inverter switching.

Collision detection triggers relay segmentation to cut current draw from electric loads, maintaining voltage stability for the electronic control unit.

Indirectly measures dynamic displacement using acceleration integration to determine linear motor bandwidth accurately.

Segmenting the stationary part and sequentially energizing sections with one drive eliminates leakage flux energy loss.

A multi-phase motor switching device reconfigures coil parts between series and parallel connections to adapt inductance for varying operational demands.

Dual angle sensors estimate shaft positions via iterative learning of static and dynamic nonlinear characteristics.

A multiphase driver circuit matches source currents via feedback control, resolving phase imbalances without increasing circuit scale.

A switching device adjusts DC power from solar modules to a variable frequency drive, preventing overvoltage tripping during operation.

A resin wall restricts sealing resin flow to suppress void formation on the lead frame lower surface.

Merging direct voltage transformation with energy storage reduces system weight and installation space by eliminating separate power electronics.

Updating voltage reference vectors every half switching period avoids distortion regions caused by inverter lockout time, reducing switching losses.

Hysteresis control dynamically modulates motor driver switch frequency based on rotation speed and current settings to prevent junction temperature overheating.

Controller detects cable resonant frequency via output current to adjust PWM switching, suppressing transient peak voltages from reflected waves.