Torque Ripple Control TRIZ Cases

Duty correction circuits adjust PWM signals to reduce noise and vibration caused by driver errors in hard disk drive motors.

Digital signal processor compensates for winding torque distortions via modulated voltage adjustments, eliminating acoustic emissions from torque ripple.

A rotary machine control apparatus applies a low-pass filter to limit torque signals.

Periodic rotation reversal cancels additive vibrational forces, protecting air-handling structures from damage.

A motor drive control unit precharges a power source smoothing capacitor to calculate its capacity value based on voltage ratios.

A control device synchronizes driving torque with cogging torque peaks to enable reliable low-speed operation.

Dynamic PI gain adjustment reduces torque ripple at high velocities, resolving the trade-off between compensation effectiveness and system stability.

Injecting fifth and seventh harmonic voltage components into PMSM control signals to minimize torque ripple.

A motor control device generates driving waveforms using interpolation angles and rotational speed data.

A control device adds an offset value to middle voltage commands based on vibration center voltage comparison.

A multiphase AC motor control device adds third-order harmonic components to the drive voltage for efficient steering operation.

A fault mode current controller drives remaining phases as a single combined phase to maintain consistent torque output.

A motor control circuit stores current rotational position and updates it using subsequent sensor signals to generate drive commands.

A three-phase switched reluctance motor torque ripple suppression method divides commutation into sections using dynamic phase excitation.

Bandpass filter extracts vibration components from motor speed signals to calculate damping torque for electric vehicle drive systems.

Dynamic current waveform control minimizes torque ripple and heat generation by limiting transient currents while compensating with adjacent phases.

Impulse width modulation eliminates ripple currents and heating in brushless DC motors by delivering periodic current impulses through an H-bridge.

A motor control system optimizes torque commands using a nonlinear model to extract and attenuate unwanted torque outputs.

Compensator corrects current signals using torque commands to resolve angular errors from magnetic saturation in high torque ranges.

A steering control device uses a variable time-constant bandpass filter to extract pulsating components from motor torque signals.

A closed-loop control method for brushless DC motors maintains a 90-degree angle between the stator magnetic field and rotor orientation.

A controller detects rotor position by comparing phase differences between target and current angular signals to generate drive commands.

Interpolation angle calculation using multiple sensors enables planned output characteristics without expensive high-resolution position sensors.

A calibration controller adjusts phase voltages to zero reference and captures sensor outputs to compensate for manufacturing variations.

Determining phase currents based on back-EMF and inductance parameters reduces torque ripple and NVH by suppressing harmonic components.

A control device switches magnetic poles between winding patterns to adjust torque output in switched reluctance motors.

An inverter driving device detects and compensates offset currents using phase current comparison.

Reference motor spectral modeling creates load-dependent compensation currents that resolve precision versus complexity trade-offs in synchronous motor control.

A motor controller reduces driving current before phase switching to minimize mechanical noise.

Sinewave commutation eliminates torque ripple and acoustic noise by replacing square wave switching with continuous sinusoidal currents.

A brushless motor speed control system uses sinusoidal and block commutation modes with seamless transitions.

A motor control apparatus corrects voltage applied to windings based on sensed oscillation frequencies.

A control system retrieves current values for healthy phases to maintain desired torque in multiphase synchronous motors.

A control unit adjusts duty instruction values to maintain active voltage vector intervals within an inverter system.

A controller uses a gain table to determine vibration reduction torque based on detected motor RPM and torque variation.

A motor control apparatus superposes sixth-order harmonic currents on zero-order currents to adjust d-axis and q-axis command values.

A motor control system uses analog voltage sampling and lookup tables to identify rotor logic levels.

Dynamic phase rate limiting balances torque responsiveness against control stability during abrupt speed changes.

Segmented control architecture applies advance angle compensation to current commands, resolving high-frequency response delays and sensor noise sensitivity.

A rotary machine control device calculates per-group correction coefficients to adjust current command values.

A motor drive device skips rotation speed correction processes to spread vibration frequencies and reduce noise levels.

Electronic torque sensing replaces mechanical valves to prevent excessive pressure damage while simplifying system design.

A three-phase motor drive method uses sinusoidal and non-sinusoidal waveforms to modulate phase energization periods.

A motor control apparatus extracts the fundamental wave component of angular acceleration to stabilize speed against load torque variations.

A vehicle controller adjusts the motor rotor position to optimize charging voltage and reduce torque ripples.

A dither noise manager dynamically modifies controller parameters based on steering signals to reduce 200-250 Hz noise while maintaining system stability.

A rotary impact tool uses a brushless motor and integral sub-hammer to drive the spindle.

A current profile calculation method minimizes torque ripple in electrical machines using dynamic angle error compensation.

A permanent magnet motor control device estimates rotor temperature by measuring rotational speed while disconnected from the load.

A multi-phase motor control apparatus shifts PWM signals over two periods to stabilize current detection.