AC Motor Control TRIZ Cases

Separate inverter-fed phase groups switch star and delta independently to limit torque jolts, smooth drive output, and reduce mechanical stress.

Asymmetric terminal areas and adjacent shared terminals reduce wiring width and board area while supporting large-current switching in compact packages.

Switching motor windings between Y and open-end modes improves voltage use at low output while preserving high-torque drive performance.

When stationary coils cannot supply enough power, adjacent movable units couple to share energy and keep linear transport applications running.

Temperature-triggered heat exchanger control warms EV transmission lubricant at cold start, improving transmission and battery efficiency.

Sector-based active vector pair selection simplifies multi-level inverter SVPWM, cutting computation and total harmonic distortion.

Parallel node layers replace sequential motor control calculations to cut response time while preserving structured control outputs.

Local current measurements are combined into a global feedback signal to synchronize parallel motor drives and suppress circulating currents.

Automatic voltage vector angle adjustment in saturation improves motor damping and avoids manual retuning under changing load conditions.

Low-side switch control uses a DC bus capacitor to recover rotor energy and sustain controller power when the battery is open or discharged.

Adaptive gate-voltage control cuts gate-oxide and drain-source stress during EV charging, extending inverter semiconductor life without extra switches.

Crystal-defect carrier trapping at the diode edge improves Schottky withstand voltage and lowers on-resistance without deep p-type pillar formation.

Reversing rotor polarity while limiting rotor current and speed-regulating stator current shortens braking time and reduces carbon brush wear.

A fixed voxel block configuration enables index conversion across 3D reconstruction setups while fitting finite cache limits and avoiding overflow buffers.

Switching elements stay ON when high current is needed, cutting pulsating current and suppressing reactor and switch heating in EV converters.

Integrated solid state contactors, DC link, relays, and redundant inverters cut wiring and enclosure size while preserving motor control redundancy.

Coil inductance shifts reveal armature position in a driveline actuator, removing sensors while simplifying control and diagnostics.

Prestored speed-torque mapping lets a fan hold target air volume with simpler control logic and less real-time calculation.

Adjusting voltage vector output periods across multiple inverters cuts common capacitor ripple current and prevents motor control malfunctions.

Duty-cycle demultiplexing lets inverter switching arms run at high PWM frequency while easing microprocessor load and cutting motor losses.

By predicting Back-EMF zero crossings, the circuit stops and resets counter timing to keep sensorless brushless motor speed accurate.

Feedback control of mover position and attitude keeps coil spacing stable for clean, contactless transport with less guide wear.

A rectifier-driven brake lets one door operator handle high- and low-voltage inputs, cutting inventory, installation complexity, and mismatch risk.

Software-based back-EMF phase calculation uses winding voltage and current to locate rotor alignment without Hall sensors or excitation pauses.

Smooth amplitude ramping at startup and stop helps linear motors avoid overdrive, noise, and unsteady vibration at non-resonant frequencies.

Randomized inverter frequency spreads motor electromagnetic forces during battery heating, cutting EV vibration noise in low temperatures.

Hardware watchdog and gate-buffer logic disable motor rotation without software delay, improving fault response and safe torque off.

Pulse intervals set to half to one vibration period let thin electromagnetic touch panels deliver stronger haptic thrust without costly magnets.

A split-source inverter links battery and supercapacitor without dual DC/DC converters, cutting AGV powertrain cost and size.

Adaptive hysteresis control lets an active front-end VFD cut line harmonics, hold switching frequency, and return regenerative power to the grid.

Composite sine-wave control lets a resonant voice coil actuator deliver comfortable low-frequency body vibration for relaxation and concentration.

Time-varying peak frequency in a voice coil actuator sustains Meissner and Pacinian stimulation without excessive vibration force.

Independent inverter voltage-vector selection cuts switching losses and simplifies predictive control in open-winding five-phase PMSMs.

Segmented piston and stator coils improve magnetic energy transfer and piston acceleration for more consistent fastening quality.

A controller reconfigures two storage modules between series and parallel charging to support 400 V and 800 V with fewer contactors and safer cutoff.

Series-parallel battery reconfiguration enables 400 V and 800 V charging through the motor and inverter without dedicated voltage converters.

Opposing torques from two winding systems dissipate DC link energy without resistors or harmful high d-currents.

Selective half-bridge deactivation removes zero-voltage vectors in part-load inverter operation, cutting switching losses without impairing motor function.

A flexible interconnect layout cuts inverter EMI while fitting more power modules onto a shared cooler without extra filtering.

Adaptive parameter estimation compensates PMSM current control for inductance, resistance, and flux drift, improving tracking and stability.

A recessed attachment surface lets the heat transfer member compress during heat sink mounting without overstressing the insulating substrate.

Camera recognition of electrode burr surfaces enables precise ultrasonic bonding while limiting burr crushing to 10 μm or less.

Different high-side and low-side transformer layouts cut isolator cost in inverter control while maintaining required insulation performance.

Single-shunt DC-link current sensing with optimized space vector control expands the detectable region, improving voltage use and reducing harmonics.

A phase compensator corrects wireless power current lag against control voltage, improving linear motor response speed and control accuracy.

Coordinated inverter and motor current control enables battery charging and heat-medium warming at zero torque without extra boost or heating modules.

Integrated coils and rotor magnets levitate and drive the impeller in 3D, reducing blood shear and stasis without separate bearing parts.

Voltage and current sensing let a single-phase motor estimate rotor position without a sensor, cutting cost and improving design flexibility.

Non-contact top gap control coils stabilize a suspended carrier during start and stop while avoiding dust from contact rollers.