Electronic Commutation Motor Control TRIZ Cases

Phase-shifted inverter control reduces direct current bus ripple, minimizing capacitor bank size and vehicle weight.

Software-based voltage detection replaces hardware components to prevent overvoltage during regeneration while maintaining motor performance.

A dual synchronous motor drive system uses current detection and magnetic pole estimation to stabilize rotation.

A compensation filter simulates inverse eddy currents to adjust pre-control signals for electric machines.

Segmenting lookup tables into MTPA and field-weakening data enables accurate current command generation across high speeds while reducing memory requirements.

A motor control unit calculates inverter dead time compensation values based on rotational angle and temperature to correct voltage command signals.

A motor control device amplifies command voltage amplitude during deceleration to increase motor loss.

A motor control circuit adjusts back electromotive force thresholds using input voltage and temperature data.

A starting circuit for single-phase AC motors uses a zero-cross detecting circuit and counter to trigger a bidirectional thyristor.

A semiconductor switching device generates a short circuit between motor windings to derive accurate rotation speed estimates.

Oscillating the rotary machine via excitation commands verifies sensor health during stop states, eliminating false detections from friction changes.

Varying gradient pole surfaces balance magnetic and spring forces to control armature disk movement, reducing uncontrolled acceleration and friction noise.

A control system shifts an electric machine operating point to a fault state trajectory based on target torque and rotor angle.

A rotary machine controller monitors winding current to determine switching device shutoff failures during operation.

Motor control device manages excitation currents to stabilize torque, compensating for induced voltage limits that cap high-speed performance.

Swinging PWM frequency via a spread spectrum controller reduces RRO and NRRO disturbances in hard disk drive head positioning.

Segmented stator with inter-dispersed permanent magnets reduces cogging torque while maintaining high power density in hybrid motors.

Point field detectors detect leakage flux within electric machine housings, replacing bulky external sensors that increase system weight and complexity.

Dynamic slew rate adjustment based on rotor flux resolves the trade-off between torque response speed and machine efficiency in asynchronous motors.

A current estimation unit compares estimated target currents to measured motor currents within a d-q coordinate system.

A motor control device manages d-axis and q-axis current commands to prevent voltage saturation during high-speed operation.

A harmonic disturbance regulator transforms feedback signals into harmonic reference frames to drive individual harmonics toward commanded values.

Voltage waveform injection into stator windings identifies rotor position and magnet polarity without external feedback sensors, eliminating device complexity.

A stator resistance estimation algorithm injects low-frequency current signals into the motor windings using a field-oriented control controller.

A torque estimator applies sigmoid functions to weighted currents for accurate magnetic flux calculation.

A 3-phase AC motor control unit switches to voltage frequency mode when current sensors fail.

A space vector based synchronous modulation method calculates output angles of fundamental voltage vectors directly against a reference angle to maintain accurate timing.

A variable low-pass filter adjusts its cut-off frequency to estimate stator magnetic flux vectors from voltage differences.

Capacitive electrodes replace voice coil motors to eliminate hysteresis and simplify manufacturing in compact camera modules.

A variable speed drive adjusts permanent magnet synchronous motor parameters using current loop integral terms.

Dynamic torque sharing factors correct imbalances between co-shafted motors, preventing erratic control surface behavior and reducing power consumption.

A control apparatus manages input voltage to suppress current fluctuations in multi-phase rotating electric machines.

An AC motor controller switches between current vector and hexagon voltage manipulating modes to maintain torque precision when operating near voltage limits.

Voltage command compensation adjusts AC commands based on LCL filter capacitor voltage to attenuate resonance oscillations and stabilize current.

A motor control arrangement calculates magnetic flux estimates and monitors magnitude changes to detect rotor stalling conditions.

A disturbance estimator calculates counter electromotive force using quadrature axis current signals and angular velocity for permanent magnet motors.

A motor control device adjusts secondary magnetic flux via advance detection units to optimize induction motor performance.

Beta projection Clarke transform removes voltage offsets from terminal signals to estimate rotor position during on-the-fly start-ups without sensors.

An eddy current brake detects relative speed by recording induced electrical variables in the induction part as it moves through a magnetic field.

Driver modules mount directly to stator windings to eliminate parasitic impedance in electric motor systems.

Segmented switching unit assigns dedicated power modules to SR motor half-bridges, optimizing heat dissipation for frequent neutral node operation.

Series-connected synchronous motors use a single converter to eliminate gear backlash and reduce component redundancy.

A vector control system calculates dead time compensation values based on motor rotational angle to adjust voltage command signals.

A motor control unit adjusts phase PWM counts to reduce switching events.

A controller distributes electric current among winding wire groups based on system temperatures to manage heat generation in rotating machines.

A motor control device separates zero-phase voltage output periods from current detection windows to eliminate signal interference.

An impedance observer estimates electrical parameter variations while a comparator calculates current differences to flag faults, reducing system complexity.

A state estimator calculates rotor resistance error using d and q-axis currents to update control parameters in real time.

A control device adjusts d-axis voltage phase to suppress motor current ripple without reducing voltage utilization.