Electronic Commutation Motor Control TRIZ Cases
- Induction Motor Inverter Control for Output Current Minimization
Voltage command correction using torque- and flux-axis current feedback cuts induction motor inverter output current and improves efficiency.
- Motor Drive Controller With State Feedback for High-Speed Stability
A rotation-matrix state feedback scheme corrects d-q voltage commands to stabilize high-speed motor drives and suppress harmonic ripple.
- Electric Motor Braking Control for Peak Current and Heat Limits
Braking is controlled through inefficient d-q current operation before multi-phase shorting, limiting peak current, heat, and battery stress.
- Motor Terminal Disconnection Detection During Powered Operation
Threshold checks on speed, voltage, and low current identify motor terminal disconnections while the motor remains powered, helping prevent unstable operation.
- Portable Molecular Assay Assembly for Low-Infrastructure Testing
Battery-powered assay sub-assemblies and optional cloud sync enable rapid molecular testing where power and connectivity are limited.
- Multi-Motor PWM Carrier Phase Control for Common-Mode Noise
Phase-shifted PWM carrier signals cancel noise vectors across multiple motors, reducing common-mode noise, filter saturation, and heat.
- Field-Oriented Motor Control With Adaptive Open-Loop Transition
Holding the current vector constant during open- to closed-loop FOC switching reduces over-current, torque ripple, and startup instability.
- Motor Input Voltage Control Using Duty Cycle Feedback
Duty cycle feedback stabilizes brushless motor input voltage under load changes, avoiding current protection trips without large electrolytic capacitors.
- Hoist Motor Current Limiting With Closed-Loop/Open-Loop Switching
Switch logic shifts hoist motor control from closed loop to open loop to limit DC-link current without speed oscillation or 3-phase sensors.
- Virtual Synchronous Wind Turbine Inverter Control for Torque Peaks
Adaptive grid current limiting with virtual impedance cuts generator power and torque peaks during grid disturbances in VSM wind turbines.
- Sensorless Motor Harmonic Control for Heat and Noise Reduction
Temperature-based harmonic switching improves sensorless rotor position estimation while reducing motor loss, noise, vibration, and overheating.
- Inverter PWM Offset Voltage Control for Lower Switching Noise
Offset voltage in PWM suppresses pole-voltage cosine components, cutting audible switching noise and improving inverter NVH.
- ESP Motor Current Balancing for Flat Cable Impedance Mismatch
Symmetrical-component control and PI voltage compensation balance ESP motor currents despite flat cable impedance mismatch.
- Synchronous Motor Startup Pole Estimation Using Peak-to-Peak Currents
Positive and negative phase-voltage pulses use peak-to-peak current changes to estimate initial rotor pole position without a resolver.
- Single-Shunt Motor Current Measurement With PWM Window Compensation
Adjustable PWM current-sampling windows preserve phase voltage while enabling accurate single-shunt measurement in three-phase motor control.
- Adaptive PMSM Observer for Zero-Phase-Shift Sensorless Control
A back-EMF observer adapts filter coefficients to maintain zero-phase-shift across PMSM speeds while supporting SPM, IPM, RFO, and SFO control.
- Synchronous Machine Control With DC Bus Voltage Feedback
A feedback loop corrects current setpoints from torque and speed commands to use DC bus voltage robustly and support defluxing in synchronous machines.
- Sensorless Electric Motor Control for Accurate Rotor Position
Switching between induced voltage and harmonic superimposition modes preserves rotor position accuracy at high voltage and low current while reducing copper loss.
- Incremental Encoder Motor Control for Direct Rotor Start-Up
Stored offset counts and multi-phase control let an incremental encoder motor start accurately without rotor initialization or extra sensors.
- Power Tool Torque Control for Small DC-Link Power Factor
Flattened torque half-waves let a small intermediate circuit track rectified mains voltage, improving power factor while cutting ohmic loss.
- SVPWM Overmodulation Using Scaled Three-Phase Voltage Reference
A scaled three-phase voltage reference simplifies SVPWM overmodulation, raising AC voltage while cutting execution time and complexity.
- Sensorless PMSM Vector Control for Smooth Restart Under Inertia
MCU-managed deceleration and speed-threshold restart let sensorless PMSMs handle high-inertia loads without jerking, noise, or overcurrent.