Torque Ripple Control TRIZ Cases

A brushless motor control system corrects sensor output signals to optimize rotor energization timing and suppress torque ripples.

A motor driving device switches winding connection conditions using a short-circuiting circuit to create circulating current during inverter zero voltage periods.

A single phase motor drive circuit dynamically configures waveform parameters to adjust motor operation based on input signals.

A motor control device shapes drive voltage waveforms through d-axis current adjustment to enhance brushless motor output.

A rotating electrical machine control device switches inverter modulation modes to manage electric noise interference with resolver signals.

A steering device adjusts current sensor offset values based on motor rotation speed to control stator coil power.

A method storing electrical energy as magnetic flux in EC motor windings to buffer pulsating DC voltage.

Adjusting trapezoidal wave signal inclination advances transistor switching timing to compensate for inductive reactance phase delay at high speeds.

Software-based sensor eliminates physical hardware while reducing vibration and noise in miniaturized brushless motor systems.

Position-dependent multipliers shape current commands to minimize torque pulsations caused by conventional excitation schemes in switched reluctance machines.

Synchronizing switching operations via 180-degree phase shifted triangular wave carriers reduces surge voltage without increasing torque ripple.

An amplitude correcting module adjusts AC command voltages based on measured phase currents, reducing torque ripples caused by machine parameter variations.

A drive circuit for a synchronous motor adjusts square-wave current timing to minimize radial electromagnetic excitation forces.

A motor controller adjusts fundamental wave current using high-order harmonic components to drive a rotor with salient poles.

A control system supplies excitation current to motor windings using a commutation feedback loop based on back EMF signals.

Dynamic carrier frequency adjustment shifts PWM interphase waveforms to maintain current detection accuracy while reducing audible sound noise.

Drive apparatus supplies stator coil with third-order harmonic current waveform to increase q-axis inductance and d-axis magnetic reluctance.

Speed foldback control regulates motor output frequency based on measured DC bus ripple voltage to limit capacitor stress.

A semiconductor device places upper and lower switching elements on opposite substrate surfaces connected by internal vias.

Embedded switching elements in a heatsink portion isolate heat from smoothing capacitors placed between connection members and control boards.

A motor control apparatus stores offset correction values for maximum and minimum phases to correct detected currents.

Torque suppression unit adjusts motor request torque to keep battery voltage and current within safe operating limits.

Electrical machines use converter-generated counter-vibrations to cancel forced vibrations from Maxwell forces, reducing acoustic noise and material fatigue.

A control apparatus switches between one-phase and two-phase current modes to maintain stable motor operation.

A control device adjusts switching timings based on system voltage changes to maintain balanced time-integrated voltages across phases.

Synchronizing load torque and power-supply pulsating components enables accurate peak motor current detection, preventing switching device breakdown.

Real-time optimization module compensates for parameter deviations and mechanical misalignments by dynamically adjusting phase advancement angles.

Third harmonic excitation in a brushless synchronous machine eliminates brushes and permanent magnets, reducing maintenance costs while maintaining reliability.

A motor drive apparatus computes sine wave periods using hall signal data to synchronize brushless motors with varying magnetic pole counts.

A synchronous machine controller superposes rotor exciting currents on synchronized armature currents to regulate magnetic field generation.

A motor control unit calculates phase duties to distribute heat generation across multiple field-effect transistors.

A sensorless DC motor control system calculates ripple frequency to determine position and speed without additional hardware.

A motor control device uses a stop signal controller to manage delta-sigma analog-to-digital conversion timing.

Dynamic d-current attenuation compensates for double mains frequency voltage pulsations, maintaining constant torque output.

A disturbance torque observer estimates spatially dependent disturbances using real-time current and position data to modify motor operation.

A resonant feedback component aligns with load impedance to route high-frequency interference signals, preventing vehicle component interference.

A linear motor control method derives precise thrust constants by interpolating local measurements across the track.

A torque ripple compensation controller determines harmonic ripple currents based on reference d-axis and q-axis currents.

An optimized pseudorandom period pattern spreads noise energy in the frequency spectrum, reducing audible whining while mitigating inverter switching losses.

Asymmetric slot design and modular magnet shifting reduce torque ripple while maintaining output stability.

A control device synchronizes carrier waves with voltage commands to maintain output symmetry in power conversion systems.

Dynamic phase difference adjustment reduces eleventh and thirteenth order harmonic components that cause unpleasant sound in vehicle electric power steering.

A motor control system captures resolver error data automatically using dedicated memory sections.

A voltage command generation method uses modified plant parameters to reduce motor operating parameter influence on output current.

Detecting frequency content of the motor torque constant compensates for manufacturing tolerances and temperature effects on torque generation.

A motor control interface merges speed and feedback signals on a single conductor using digital-to-analog conversion and peak detection.

Gradually reducing the ON DUTY of switching elements via SWEEP control suppresses surges and noise across all rotation speeds.

A controller adjusts inverter switching frequency based on real-time motor torque and speed to shift noise outside the sensitive human hearing band.

A motor controller signal conditioner alters harmonic drive signals to minimize torque ripple and vibration.