Electronic Commutation Motor Control TRIZ Cases

Predictive switching from SMO to HFI keeps sensorless BLDC motor control stable during stalls, improving rotor position tracking and reducing torque ripple.

Phase-corrected dq control with dual stator windings enables flux weakening while canceling 6th and 12th harmonics that drive torque ripple.

By correcting motor speed commands from the DC voltage gap, this case keeps elevator inverter drive stable during brief power dips.

Randomized PWM switching frequency spreads spectral peaks in motor drives, cutting electromagnetic interference and audible noise.

Airgap flux sensing and a flux observer improve low-speed asynchronous motor control stability despite stator resistance changes.

Variable torque and exciting current commands improve generator efficiency at low load while preserving maximum torque capability.

Induced current integration during DC motor braking estimates residual rotation when terminal voltage and pulse period cannot be measured.

Voltage comparison and selection circuitry monitors both DC driver terminals through on and off states to improve fault detection and functional safety.

A feedback-corrected recursive control model adjusts current setpoints in real time to use DC bus voltage robustly in electric machines.

Threshold comparison on both DC driver outputs enables anomaly detection in on and off states, improving diagnostic fault coverage.

Direct current and voltage reference calculation cuts SPM motor control computation time and processor load while supporting faster sampling.

Peak current sums across motor sectors reveal phase unbalance and phase loss early, protecting stator windings with robust detection under load changes.

Motor windings and existing half-bridge switches boost lower source voltage to charge higher-voltage EV batteries with less added hardware.

Bus-voltage feedback corrects the coordinate angle and d-q currents to suppress overcharging in capacitor-less PMSM drives.

When the temperature detection circuit fails, estimated motor temperature rises gradually with current-based correction to avoid excessive EPS current limiting.

Reduced space vector control balances split DC-link voltages in a degraded three-phase converter while maintaining torque and limiting ripple.

Rotor-position and junction-temperature-based ZVM helps inverters sustain low-speed torque while balancing thermal stress in switches and diodes.

Dynamic KIP-scaled q-axis compensation improves acceleration tracking in three-phase AC motors while suppressing resonance and preserving stability.

A reduced-order flux observer replaces heuristic V/Hz compensation to keep sensorless induction motor drives stable across varying loads and speeds.

Periodic excitation isolates stator resistance from inductive and back-EMF effects, enabling accurate sensorless winding temperature estimation.

When one phase-current sensor saturates, the controller derives the highest phase current from the other two to extend motor current range.

Uses motor winding energy cycling and existing current sensors to estimate DC link capacitance and remaining capacitor life with minimal disruption.

A modulated DC test signal identifies a connected motor without rotation, letting the controller load matching parameters for stable operation.

By modulating d-current to create DC link voltage ripple, existing motor-control sensors can estimate capacitor aging and remaining service life.

Dynamic DQ phase advance keeps PMSM stator voltage within inverter limits at high speed while preserving torque production.

Fan power is lowered during brake overexcitation and raised afterward to cut power peaks, cooling load, and overheating in robot arm control.

A BLDC electric sander uses step-up power correction and sensorless control to cut harmonic interference while keeping the tool compact and easy to grip.

An external regulation loop sets PMSM rectifier current vectors from DC bus voltage or battery current, avoiding torque and speed sensing.

Using magnetic flux instead of current, this control approach damps flux vibration and stabilizes synchronous machines across wide torque-speed ranges.

By limiting only summed fundamental and harmonic space vectors that exceed a threshold, the control avoids inverter shutdowns, losses, and torque drop.

A high-frequency current drives the motor to emit audible sound without rotation, enabling remote power tool location without adding a speaker.

Primary-side pulse injection detects excitation transformer parameters without rotor hardware, improving fault detection accuracy and reliability.

Adaptive high-Z timing uses Back-EMF zero-crossing detection to boost LRA power delivery, speed response, and reduce auto-resonance errors.

Using two phase references in a multi-level converter, this case cuts torque and current ripple to reduce low-speed vibration and jerking.

A virtual neutral bridge lets low-voltage brushless motors apply full DC link voltage per phase, boosting torque and exposing winding faults.

High-frequency voltage shaped by magnetic saturation keeps current loci elliptical, improving sensorless rotor position estimation in low-saliency machines.

By comparing applied and induced voltage during vector control, this case detects out-of-step PMSM operation without sensors or inverter shutdown.

Voltage-based flux updating separates flux and position calculations, improving sensorless rotor estimation accuracy and response.

Transient slip frequency compensation in stationary-coordinate vector control stabilizes induction motor speed response while suppressing vibration and torque loss.

High-frequency injection at start-up extracts and corrects PMSM parameters for more accurate FOC without adding control-phase complexity.