Electric Motor Control TRIZ Cases

Calculating phase current sums isolates the specific faulty drive, preventing unnecessary shutdowns of healthy motors on a common DC bus.

Activating an energy dissipating unit on the DC-link cuts shutdown wait times and prevents inrush current damage during maintenance.

A variable speed compressor control system dynamically adjusts motor speed based on winding temperature to prevent choke and overload.

A motor control unit compares two-phase current differences across multi-system windings to detect circuit faults.

Superimposing fifth and seventh harmonic components reduces phase current peaks, minimizing heat generation and torque ripples during low-speed operation.

A DC bus discharge method converts motor current signals into a stator coordinate system to generate voltage control signals for active discharge.

A three phase duplexing motor controller manages supply current to normal windings during abnormality occurrence.

A servo control apparatus displays online adjustment stages and progress through a dedicated display unit.

Coupling device engages oil pump with different turbine spools based on speed, ensuring adequate lubrication during start-up sequences.

Segmented current sensing isolates individual brake faults within a shared power architecture, enabling precise fault location without adding separate sensors.

A motor control apparatus adjusts notch filter parameters using controlled oscillation and amplitude evaluation to optimize velocity control settings.

An acceleration estimator monitors motor output speed to generate an acceleration-limited set point.

A motor drive device detects failures by comparing current change rates during dynamic brake operation.

A current sensing circuit uses dual differential amplifiers to handle varying common mode voltages in h-bridge applications.

Modulating phase switches to maintain ground potential, preventing uncontrollable current growth through common-mode inductance.

A motor controller estimates angle error correlation values using current command signals to correct detection errors.

Controller adjusts motor current to balance motive power and thermal requirements, preventing mechanical accuracy loss from temperature fluctuations.

Motor control system estimates battery current to preemptively modify torque commands, preventing over-discharging while maintaining voltage utilization.

A controller circuit estimates rotor position using stator winding current to enable continuous commutation without Hall Effect sensors.

Estimating permanent magnet temperature from stator windings compensates for thermal variations, reducing torque ripples in brushless DC motors.

A motor circuit diagnostic method monitors q-axis current and demanded phase voltage to identify open phase faults.

Motor control device adjusts electric current based on load sensor data to reduce power consumption while maintaining target pressing force.

A sensitivity switchable detection circuit uses a weighting function to transition between high and low gain regions.

Dynamic parameter switching resolves the trade-off between motor positioning precision and system complexity in camera autofocus systems.

Weighted moving average and FIR filters reduce torque ripples below 0.01 Nm, improving steering feel without delaying response.

A shift range control apparatus adjusts motor energization phases based on rotational speed to ensure precise positioning.

Piezoelectric stacks dynamically adjust the radial air gap width to prevent rotor-stator contact caused by centrifugal forces and vibrations.

A brushless motor inverter divides control periods into sectors to deactivate defective switches and generate positive average torque.

Dynamic duty cycle adjustment based on real-time junction temperature estimation enhances electric machine torque capability at low frequencies.

Digital encoder signal generation splits interpolated and non-interpolated outputs to drive precise object positioning and speed detection.

Segmented auxiliary voltage sources allow frequency converters to operate during power disruptions without excessive component stress.

An offset voltage generator uses limiters and a summer to process phase-voltage signals.

Built-in test methodology measures brake response time via existing aircraft components, eliminating ground equipment needs.

Torque comparison detects unopened brakes without extra sensors, preventing delayed failure detection.

Electronic control unit switches between first and second PWM controls to manage inverter switching elements.

Magnetic flux sensors detect motor field density to balance torque across multiple actuators, preventing force fighting during structural movement.

Periodic excitation pulses replace continuous signals, reducing position determination time while maintaining measurement precision.

A drive arrangement uses a supercapacitor and DC-DC converter to power a motorized seat belt retractor.

An optical driving mechanism uses a single coil assembly to drive and sense position via inductance variations.

A harmonic regulation system attenuates specific frequencies in rectified output current using a control circuit with DC offset removal and angle generation.

A dual inverter control apparatus limits current command values based on detected voltage differences between redundant power sources.

Secondary clamp circuits dampen transformer voltage spikes to suppress electromagnetic interference in power converters.

An integrated motor bridge driver uses an arbitration circuit to manage control signals from dual microprocessors.

A motor inverter unit switches modulation modes based on semiconductor temperature and current conditions.

Segmented switching cells distribute discharge current across multiple arms to prevent undesired motor torque and reduce component stress.

Controller isolates drive faults via torque discrepancy analysis, reducing system complexity while maintaining reliability.

MCU software calculates core temperature from electrical parameters to eliminate thermal lag and prevent overheating failures in DC electric tools.

Microcontroller opens inverter switches at zero drain current, protecting power semiconductor devices from inductive energy damage during load disconnection.

A vehicle inverter controller energizes gate pairs during pre-charge to detect faults by monitoring voltage drops and current flow.