AC Motor Control TRIZ Cases

Feedforward torque and motion control improves circuit breaker contact travel accuracy, response time, and wear adaptation.

Series-parallel winding switchover lets an SRM deliver high low-speed torque and higher speed with only two extra MOSFET switches.

DSP phase tracking uses delayed voltage and current sensing to correct LRA resonant drift from humidity, climate, and aging.

Mode switching between phase ripple, bus ripple, and loss suppression cuts current ripple and switching heat in AC rotary machines.

Distributed section controllers plan local track segments from destination data, cutting computing load and simplifying long-route expansion.

Digitally updated turn-on, turn-off, and soft-shutdown settings let a gate driver adapt during switching to cut EMI and voltage stress.

Shifted PWM comparison pulses align winding voltage transitions to cancel leakage currents and cut electromagnetic noise in AC rotary machines.

By separating overlapping phase voltage changes, this motor control approach suppresses axial voltage spikes, noise, and bearing corrosion.

Selective powering of segmented stator coils cuts vacuum-chamber heating while maintaining precise linear sample positioning.

Predetermined sampling points tied to carrier-wave PWM improve phase current accuracy despite changing low-side switching timing.

Different stray-capacitance dielectric members collect normal-mode and common-mode noise inside the module, avoiding extra capacitors.

Automatic phase-shift control adapts eccentric-mass vibration to resonance peaks, cutting noise, energy use, and setup time.

Switching an electric machine between three power levels improves partial-load efficiency while reducing acoustic abnormalities and harmonics.

Selective winding switching cuts lead wires and switching elements while improving torque, output, and efficiency across motor speed ranges.

A nonuniform magnetic field from asymmetric coil layers extends linear actuator stroke and enables nonlinear force without a longer coil.

PWM duty cycles are clamped to enforce minimum switching separation, cutting bearing common mode current while limiting ripple.

A side-by-side battery, motor, and pump layout on the swivel frame lowers center of gravity and improves excavator balance.

Segmented cooling spaces and flow holes route refrigerant across three power modules to improve inverter heat dissipation and reliability.

Variable phase shifting between two winding voltages suppresses current and torque ripple while preventing overcurrent.

PWM edge shifting creates a stable minimum sensing window for 1-shunt phase current measurement while avoiding noise from duty-cycle transitions.

Different quality functions for acceleration, cruising, and deceleration improve linear motor precision while reducing power loss and thermal load.

Printed multi-layer coil rollers align adjacent turns axially to cut actuator coil cost and material use while preserving force and precision.

Parallel unit capacitors and equidistant power modules shorten current paths to reduce inductance, energy loss, noise, and inverter size.

A switched power input circuit isolates inverter faults and blocks reverse-polarity backfeed to prevent unwanted microcontroller restarts.

Using the motor stator winding and inverter as a switched-mode converter, this case balances series battery pack voltage during DC fast charging.

A hysteresis comparator and linear loop filter cut distortion harmonics while adapting PWM period and switching frequency to save power.

A supercapacitor or rechargeable buffer supplies motor peaks while batteries charge it at a controlled average current to extend battery life.

Secure encrypted handshakes between motor electronics and an external controller block unauthorized motors and enable control only after verification.

A nonferrous pump-in-reservoir implant uses transdermal power to inflate medical implants while preserving MRI compatibility and limiting heat.

Controlled d-axis current turns stationary EV motor and inverter losses into coolant heat for cabin and battery warming.

Additional stator windings and an ECU harvest induced EMF to feed back power, cutting motor current draw while supplying electrical loads.

Direct dq-axis voltage vector scaling keeps permanent magnet synchronous motors within power limits without complex motor models.

Separate motor control circuits heat the battery pack during driving, cutting inverter and winding loss in low-temperature vehicle operation.

Switching between two-level and three-level inverter operation by torque and speed commands cuts combined losses in the converter and motor.

Monitoring coil current during holding control reveals external force on a movable part, helping prevent failure and stabilize control.

A fail-safe switch layout lets the inverter passively damp actuator motion during power loss, helping prevent flight-surface flutter.

Removing oxide from the ohmic electrode helps HF etching avoid interface erosion and isolation defects in SiC Schottky device fabrication.

Periodic switching of stator position and coil output ratios evens acceleration and deceleration loads, reducing coil heating and local wear.

Averaging load angles across positive and negative speeds separates resolver offset and delay errors for more accurate rotor position control.

An AC choke, grounding brush, and electrostatic shield cut induced bearing currents in multi-phase AC motors by blocking resonance and adding a discharge path.

Averaged load-angle data across positive and negative speeds calibrates resolver offset and group delay for more accurate rotor position.

Resonant shaft, arm, and rotor oscillation boosts gyroscopic torque and power output while reducing reliance on larger motor assemblies.

Honeycomb rib regions linked by circumferential ribs stiffen the housing, shift resonance higher, and cut motor-speed noise by about 4 dB.

PWM control coordinates the booster circuit and three-phase inverter to cut switching loss and current harmonics in motor drives.

A single-terminal driver decodes duty cycle to run multiple actuator types, cutting GPIO count, module size, and noise-induced actuation.

Corrected loss and sensor data estimate switch temperature accurately when the sensor is separated from the switch, helping prevent overheating.

A relay-switched solar microinverter soft-starts induction motors, cuts peak current, and supplies reactive power compensation for irrigation pumps.

Separate isolated DC buses let each inverter phase regulate line-to-neutral voltage, cutting bus voltage, capacitor size, and switch cost.

Maintaining coil current above zero boosts battery heating through a stronger DC component while suppressing noise during converter switching.