Torque Ripple Control TRIZ Cases

Circuit protector compares driving and inductor differential voltages against reference values to rapidly detect overcurrents without complex structures.

An asymmetric pole BLDC motor with sine wave drive reduces cogging torque and noise for higher efficiency.

Controller drives inverter legs to generate alternating current, heating the battery via internal resistance and eliminating separate heater complexity.

A control system generates ramped voltage commands to manage permanent magnet machine transitions.

A motor control unit extracts higher harmonic components from back-EMFs using Taylor expansion to correct q-axis current command gain and phase.

A rotary electric machine control apparatus estimates power supply relay and choke coil temperatures to calculate dynamic current limiting values.

A dual inverter driving device uses distinct switching frequencies to manage current conduction in rotating electric machines.

A control unit determines rotor period deviations to adjust electric motor speed for stable vehicle pump operation.

A motor control device detects runaway states by comparing torque command differentials against motor jerk signs.

A variable frequency drive generates a harmonic mitigation signal to reduce electrical distortion in motor systems.

A compensation amount calculator generates a signal to stabilize multiple-winding motor drive control.

An auxiliary inductor applies corrective magnetic flux to a DC link inductor to dampen sub-synchronous torsional interactions and torque imbalances.

Applying negative gate-source voltage to EPS inverter switching elements suppresses damping currents, eliminating the need for additional blocking components.

Harmonic cancellation controller modifies inverter signals to reduce stator vibrations and acoustic noise emissions by up to 10 dB.

A semiconductor device synchronizes multiple microcontroller counters using a parent-child trigger signal mechanism.

Control arithmetic unit calculates correction signals for angle detector sine and cosine signal errors caused by disturbance magnetic flux components.

Multi lane permanent magnet synchronous motors generate controlled radial forces through independent current demand signals applied to unbalanced phases.

Variable switching frequency adapts to rotor position, reducing current ripple without increasing power losses from higher average frequencies.