Electronic Commutation Motor Control TRIZ Cases
- Multi-Source Power Conversion Vector Control
A control unit computes output voltage command vectors for multiple power sources to drive an AC motor efficiently.
- Brushless Motor Crossover Detection for Watchmaking Stability
Induced voltage crossover detection triggers drive pulses at optimal moments, resolving rotor speed instability under shock without external sensors.
- Rotary Electric Machine Torque Modulation for Partial Load Efficiency
Periodic torque modulation reduces motor core losses under partial load while maintaining average torque equivalence.
- Motor Adaptation Device Switching Sensitivity Stages
Adaptation device switches sensitivity stages based on rotor position to process generator and load voltages via a single analog input.
- Inverter Control for Eco-Friendly Vehicles
Dynamic frequency adjustment reduces switching loss and electromagnetic interference while improving NVH performance.
- Electric Motor Controller with Line Detection for HVAC Retrofit
An electric motor controller uses line detection to adapt to voltage ripple, resolving retrofit complexity.
- Sensorless Motor Drive Vector Control with Back-EMF Observer
A back-EMF observer estimates rotor speed from inverter currents and filter voltages to eliminate oscillations during low-speed operation.
- Motor Drive Device Torque Ripple Suppression via Delay Compensation
A motor drive device corrects voltage and current command values using rotation angle data to generate precise PWM signals.
- Parallel Voltage Reducers for Steering Assist Reliability
Alternating parallel voltage reducers prevents simultaneous thermal failure and ensures continuous steering assist operation.
- LRA Controller Switching to Open-Loop When BEMF Unreadable
A linear resonant actuator controller uses an alternate cycle module to push the actuator at a predetermined frequency.
- Sensorless Flux Estimation for EPS Motor Control
Mutual feedback between flux and velocity modules resolves the reliability versus measurement precision contradiction in electric power steering systems.
- Induction Motor Voltage Compensation for Starting Torque
Dynamic voltage compensation prevents motor stoppages during load changes by adjusting command voltage via real-time current feedback.
- Field Current Control for Rotary Electric Machine Efficiency
A control unit adjusts field current to minimize voltage deviation in rotary electric machines.
- Inverter Phase Error Compensation via Pre-measured Voltage Feedback
A phase compensation apparatus converts three-phase voltage into d-axis and q-axis components to generate a precise output signal.
- Sensorless Permanent Magnet Temperature Estimation in Electric Motors
A sensorless technique estimates permanent magnet temperature using back-electromotive force data from the electrical motor.
- Minimizing Demagnetization in Rotor Magnets via Current Trajectory Control
Controller determines a demagnetization line and selects a starting point on the trajectory to prevent permanent magnet degradation under high torque demand.
- Motor Sensing Circuit Transient Voltage Suppression
An impulse absorber diverts transient currents to ground, preventing signal distortion and protecting the motor driver circuit from damage.
- Inverter Switching Control for Surge Reduction
Multi-level control signals synchronize diverse switching elements, reducing surge voltages and transient currents.
- Electric Motor Driving Apparatus Phase Control
A control unit calculates a composite voltage command from two inverter vectors to drive an electric motor.
- Motor Controller Back-EMF Detection via PWM Duty Cycle Control
A motor controller adjusts pulse width modulation duty cycles to stabilize floating phase pin voltage for accurate back electromotive force detection.