Electronic Commutation Motor Control TRIZ Cases
- Phase-Shifted Inverter Control for DC Bus Ripple Reduction
Phase-shifted inverter control reduces direct current bus ripple, minimizing capacitor bank size and vehicle weight.
- Motor Regeneration Control via Voltage Threshold Detection
Software-based voltage detection replaces hardware components to prevent overvoltage during regeneration while maintaining motor performance.
- Dual Motor Drive System Sensorless Control
A dual synchronous motor drive system uses current detection and magnetic pole estimation to stabilize rotation.
- Electric Machine Current Control via Compensation Filter
A compensation filter simulates inverse eddy currents to adjust pre-control signals for electric machines.
- IPM Motor Current Command Generation via Lookup Table Segmentation
Segmenting lookup tables into MTPA and field-weakening data enables accurate current command generation across high speeds while reducing memory requirements.
- Motor Control Unit Dead Time Compensation
A motor control unit calculates inverter dead time compensation values based on rotational angle and temperature to correct voltage command signals.
- Motor Control Device for Rapid Deceleration
A motor control device amplifies command voltage amplitude during deceleration to increase motor loss.
- Stepping Motor Back-EMF Threshold Adaptation
A motor control circuit adjusts back electromotive force thresholds using input voltage and temperature data.
- Single-Phase AC Motor Starting Circuit with Zero-Cross Control
A starting circuit for single-phase AC motors uses a zero-cross detecting circuit and counter to trigger a bidirectional thyristor.
- AC Motor Speed Estimation Using Controlled Winding Short Circuits
A semiconductor switching device generates a short circuit between motor windings to derive accurate rotation speed estimates.
- Rotary Machine Control Device Abnormality Detection
Oscillating the rotary machine via excitation commands verifies sensor health during stop states, eliminating false detections from friction changes.
- Electromagnetic Brake Armature Control via Gradient Pole Surfaces
Varying gradient pole surfaces balance magnetic and spring forces to control armature disk movement, reducing uncontrolled acceleration and friction noise.
- Electric Machine Control via Fault State Operating Point Shift
A control system shifts an electric machine operating point to a fault state trajectory based on target torque and rotor angle.
- Rotary Machine Controller Shutoff Failure Diagnosis
A rotary machine controller monitors winding current to determine switching device shutoff failures during operation.
- Stepping Motor Control Device Torque Stabilization
Motor control device manages excitation currents to stabilize torque, compensating for induced voltage limits that cap high-speed performance.
- Spread Spectrum Spindle Motor Control for HDD Positioning
Swinging PWM frequency via a spread spectrum controller reduces RRO and NRRO disturbances in hard disk drive head positioning.
- Hybrid Permanent Magnet Motor Cogging Torque Reduction
Segmented stator with inter-dispersed permanent magnets reduces cogging torque while maintaining high power density in hybrid motors.
- Integrated Point Field Detectors for Electric Machine Sensing
Point field detectors detect leakage flux within electric machine housings, replacing bulky external sensors that increase system weight and complexity.
- Asynchronous Machine Torque Control via Dynamic Slew Rate Adjustment
Dynamic slew rate adjustment based on rotor flux resolves the trade-off between torque response speed and machine efficiency in asynchronous motors.
- Power Steering Current Estimation for Fault Tolerance
A current estimation unit compares estimated target currents to measured motor currents within a d-q coordinate system.
- Motor Control Device Voltage Saturation Prevention
A motor control device manages d-axis and q-axis current commands to prevent voltage saturation during high-speed operation.