Electronic Commutation Motor Control TRIZ Cases

A current transformer and shared control information stabilize DC voltage and suppress magnetization without large current or voltage sensors.

Alternating winding sampling doubles equivalent sampling frequency in dual three-phase PMSM drives, cutting delay and harmonics at low switching frequency.

Phase-adjusted inverter output cancels motor-speed harmonics in input power, helping maintain operating range within supply limits.

Selective multi-converter drive pulses reduce low-current output distortion while preserving pulse width and electromagnetic compatibility.

Measured phase voltages reveal magnetic pole angle, letting motor control correct rotor sensor offset for more accurate synchronous machine calibration.

A 9-switch inverter controls dual three-phase reluctance windings individually while cutting circuit area, heat, cost, and switch failure risk.

Phase relationships between current and voltage isolate slip and fault lines from noisy motor spectra for more precise machine state monitoring.

A slave power converter corrects command phase differences to keep induction motor magnetic fields synchronized at high rotational speeds.

Using q-axis current instead of absolute current, this case improves three-phase motor idling detection at high supply voltage.

Coordinated harmonic-plane control boosts poly-phase motor torque while limiting rotor winding losses from harmonic currents.

An integrated cooling-carrier layout combines input, output, and control modules to cut assembly steps, size, weight, and vibration paths.

Back-EMF estimation and rotor speed comparison reveal locked-rotor faults early, allowing the motor controller to shut down before damage.

Dual motor inputs share torque and feedback control to overcome cable twist resistance while maintaining precise robotic endoscope tracking.

Superposed harmonic test signals let an electric machine controller self-calibrate torque ripple, cutting vibration and noise without torque sensors.

Motor d-axis and q-axis current sensing detects impact operation without extra sensors, enabling steadier force control and less overimpact.

Timed high-impedance detection windows let a 2-phase stepper drive measure Back-EMF and adjust current to prevent step-out and improve efficiency.

Variable d-axis current ramping by rotor angle cuts torque and noise during DC bus capacitor discharge after EV shutdown.

Phase-based carrier frequency switching cuts inverter loss while suppressing motor loss in drive electric power control.

Sequential gear switching cuts AC motor inrush current and switch wear, while PWM-to-analog control stabilizes high-power loads.

Amplitude modulation separates carrier frequency from speed control, giving AC motors zero-RPM torque, fine positioning, and wide speed range.

Switching between current-based and voltage-based flux estimation improves motor control reliability across low and high speed ranges.

Adaptive pulse injection and capacitor voltage sensing improve switched reluctance motor rotor position estimation from low to high speed.

Voltage-difference feedback adjusts the current request in a brushless power tool motor to prevent wind-up and reduce delayed response.

Predefined inverter voltages and phase-current measurement identify FOC motor parameters accurately, improving control efficiency across motors.

Dynamic field weakening boosts stage-one motor speed, then switches to static commutation to cut hydraulic tool cycle time and save battery.

Air-gap measurement coils directly capture flux and current data to control electric machines without position sensors or fragile model estimates.

Shaft grounding and low-pass line filters suppress servo-drive EMI above 30 MHz, protecting radio astronomy signal integrity.