AC Motor Control TRIZ Cases

Switching pole-count configurations reduces magnetizing current at low speeds, enabling smaller contactors and lighter controllers for ram air fan systems.

Variable series resistance limits in-rush current based on vehicle speed, preventing voltage drops that degrade anti-lock braking and steering systems.

A clothing styler predicts garment weight using motor vibration data and neural network inference.

A steering controller calculates a rack force compensation value to adjust the setpoint variable for electric assistance.

Segmented phase legs maintain low battery ripple current despite varying internal impedance, minimizing weight and cost.

Segmenting power consumption signals distinguishes normal cutting events from skin fat soiling, enabling accurate dirtiness assessment without extra sensors.

A single bidirectional AC/DC converter switches between grid charging and motor driving modes using GaN HEMT technology.

Segmented trapezoidal capacitors allow selective extraction of defective elements, eliminating full assembly replacement costs in hybrid vehicle power systems.

A current boost circuit uses a sensing circuit and voltage regulator to provide supplemental current from a capacitor bank.

Active Front End units rectify AC voltage to DC via dynamic switching, eliminating large static filters that cause excessive space usage and high costs.

A dead time estimator calculates actual output stage delays using current command and detection differences.

Mechanical clutch extraction eliminates VFD harmonics while maintaining accurate pump speed control.

A fan motor braking apparatus uses bridge structures to stop the motor when necessary.

Linear drivers read slider identifiers to supply targeted current, eliminating complex global control and reducing energy waste.

A resonant gate driver recirculates charge between an inductor and the gate using periodic oscillations.

Merging safety functions into a central disconnecting circuit reduces assembly complexity while maintaining reliable safe torque-off capability.

Semiconductor switching elements block supply network current to protect pitch drives, enabling emergency storage power for safe blade feathering.

A motor driving system learns current sensor offsets using induced voltage conditions.

A controller calculates converter voltage command values to minimize power loss in rotary electric machines.

A three-phase machine uses split stator windings and switch assemblies to reconfigure electrical connections between series and parallel modes.

A power module drive circuit suppresses parasitic oscillation by dynamically switching ground wiring impedance based on current detection.

Dual booster circuits generate gate drive voltages for N-channel MOSFETs, preventing unintended charging between parallel-coupled batteries.

A control unit detects phase inductance to align the rotor and initiate startup oscillation without a position sensor.

A steering control apparatus calculates induced voltage to detect end abutment states without relying on accurate steering angle sensors.

Dynamic limiting power adjusts to suppress inverter side voltage oscillations and prevent overvoltage or overcurrent instability.

A damping network absorbs energy at a controlled rate to regulate torsional oscillations in inertial flywheels.

A driving device adjusts inverter carrier frequency based on coil connection state to optimize motor performance.

Digital PWM modulation stabilizes resolver excitation amplitude, eliminating analog circuit complexity and heat-induced measurement errors.

PWM control reduces peak and RMS currents in an HVDC brushed motor, preventing thermal trips and extending brush life in paint sprayers.

Electronic control unit adjusts smoothing capacitor voltage to correct current sensor detection signals in real time.

Iterative D-axis and Q-axis current modification within defined search zones optimizes motor drive operation.

Series capacitors and bilateral switching manage intermediate potentials, reducing switching losses while maintaining reliability during component failures.

Coupling units bypass failed cells in parallel branches, maintaining reliability while decoupling the electric machine.

Edge detection microcontrollers stabilize torque and resist voltage variations in automotive brushless motor actuators.

A motor driver outputs a bus voltage feedback signal to regulate the drive voltage level.

Adaptive PWM duty cycle regulation maintains constant rotational speed in brushed DC pump motors using real-time electrical and thermal data.

A motor drive circuit uses a single serial interface to transmit energization and duty ratio data for independent DC motor control.

Silicon carbide modules in variable speed drive controllers reduce switching losses and footprint size.

A three-phase power inverter uses phase skipping control to dynamically select operating modes based on available power levels.

A command compensation unit adjusts torque and magnetic flux commands using a single unified magnetic flux table to handle temperature variations.

A control device modulates a periodic signal onto the pre-commutation angle of an electronically commutated motor to detect state parameters.

A THQ transformer topology uses tertiary windings with surge suppressors to quash transient voltages and harmonic currents in power systems.

Space vector PWM minimizes power loss by allocating zero voltage vectors based on minimum sensing time, improving thermal performance.

A linear vibration motor control method detects displacement and velocity using induced electromotive voltage during non-energization periods.

Segmenting the capacitor into distinct units reduces device complexity and cost while maintaining power yield in switched reluctance motor inverters.

A motor drive logic inserts a non-energizing period after forced commutation to enable smooth transition to position-based control.

Controller maintains capacitor voltage above fuel cell level before disconnecting boost converter, preventing forced discharge that deteriorates catalyst.

A non-back-drivable mechanical brake assembly uses a male disk projection and female disk groove to stop electric motor rotation instantly.