Electronic Commutation Motor Control TRIZ Cases

Command voltage signatures reveal phase resistance imbalance in synchronous motor drives, enabling real-time correction or shutdown.

Dynamic gain switching keeps motor current control stable during disturbances while suppressing steady-state pulsation, vibration, and noise.

Operating-point torque splitting sets q-axis and field-weakening currents to improve PM motor torque control with lower computation and material cost.

By setting current commands to match short-circuit current, this case reduces current error and torque fluctuation during inverter restart.

Independent phase windings and full-bridge inverter control improve sensorless rotor position estimation and constant torque in PM motors.

Real-time resonance and actuator feedback reshape haptic waveforms to keep vibration output consistent across devices and changing conditions.

Master-slave voltage phase correction keeps multiple induction motor converters synchronized at high speed, reducing interference and torque loss.

A summed phase-current sensor captures fault current that bypasses low-side sensing, enabling detection and motor compensation during high-side shorts.

Rotor reference frame current imbalance enables fast PMSM winding fault detection and localization before overheating damages the machine.

A two-mode gear shift and flux-weakening motor control reduce output speed variation while preserving torque for more efficient machining.

A controller switches a six-phase machine from dual three-phase control to single three-phase operation after a fault to sustain drive output.

Inactive-phase voltage pulses improve rotor position estimation at high speed while enabling self-calibrating switched reluctance motor control.

Complementary RSPWM control balances zero-phase voltage between dual inverters, cutting common mode current, motor losses, and damage risk.

Switching between current feedback and speed feedback control helps parallel motors accelerate reliably despite load deviation.

Additional PWM pulses around inverter mask periods cut switching loss while preventing torque shock, vibration, noise, and unstable AC motor operation.

Variable mask-period PWM control cuts switching loss in three-phase AC motors while limiting step-out, vibration, and noise.

Motor and position feedback detect component-substrate touch, cutting sensor count, cost, and control complexity in semiconductor bonding.

Loss-power feedback with a tracking differentiator finds target d-axis current faster, cutting PMSM parameter dependence and computing load.

Q-axis current matching based on DC voltage differences suppresses torque imbalance, oscillation, and noise in multi-winding motor control.

Perpendicular sensor voltage pulses reveal phase-specific current sensor gain errors, including unbalanced errors, even with a stationary rotor.

Dual filtering separates fundamental and harmonic feedback components to cut vibration and structure-borne sound in electric machine control.

When DC link voltage limits full PWM modulation, induced-voltage feedback adjusts PWM frequency to sustain brushless motor power.

PI-based deviation and integration processing extracts accurate resolver phase information from noisy A/B signals for better motor position control.

By separating duty adjustment and current sensing within each PWM cycle, this motor control case reduces waveform distortion and noise.

Self- and mutual-inductance measurements improve sensorless rotor position estimation in high rotor pole switched reluctance machines.

Observer and feed-forward compensation reduce cross-coupling and Back-EMF disturbance effects in IPMSM motor control with less delay sensitivity.

Harmonic group analysis separates positive and negative air-gap coupling in dual-air-gap PM motors to raise torque density and stabilize performance.

A lower-arm on-state and upper-arm ground path stop filter capacitor charging before relay closure, enabling smooth inverter startup.

Shoot-through vector sampling with an impedance network balances PMSM current sensor scaling errors, removing dead zones and torque ripple.

Phase-shifted PWM enables one AD converter to sample each motor phase current reliably, cutting cost without losing detection accuracy.

High-current voltage steps reveal load resistance and converter error voltage, enabling more accurate compensation in three-phase machine drives.

Differential Back-EMF across motor contacts detects drug delivery drive blockage despite elastic plunger compliance, avoiding extra sensors.