Electric Motor Control TRIZ Cases

A fan motor control device repeatedly switches power supply to detect rotational speed anomalies during operation.

A motor controller adjusts pulse width modulation frequency based on limiting current values to manage heat generation in the drive system.

External NFC antenna extends magnetic field beyond metal housing to relay user commands without compromising enclosure protection.

Variable coolant flow reduces rotor drag losses and pump energy consumption while maintaining optimal stator winding temperature.

Parallel snubber circuits protect GaN switches from voltage overshoot, enabling high-speed operation without damaging components.

Captures motor phase voltage during inverter off-phases to determine insulation faults, preventing electrical shock risks without increasing circuit complexity.

Coaxial redundant inverters cut current to faulty windings while driving the healthy winding, maintaining steering reliability without bulky separate housings.

A blower control circuit detects insufficient airflow to adjust motor speed and prevent damage.

A segmented power source monitoring controller powered by a backup battery maintains system continuity and issues fault warnings when the main battery fails.

A motor driving unit manages inverter output through intermittent stopping and restarting to handle capacitor voltage fluctuations.

A control device calculates DC current input to an inverter circuit using detected midpoint potentials and phase currents.

A buffer capacitor maintains rotation count values during power loss to preserve absolute motor position without external sensors.

Protective controller monitors input and output power against command values, halting conversion to prevent excessive load energy during disturbances.

A load characteristic estimating apparatus calculates sequential averages of torque signals during normal and reverse rotation states.

A velocity observer estimates motor speed to generate torque commands, maintaining assist torque during current sensor faults.

Dynamic motor current compensation prevents high-speed catch-up and overheating, enabling smoother steering without expensive hardware.

A wire-wound stator uses phases with distinct temperature-responsive electrical resistance to enable thermal monitoring via existing electrical infrastructure.

A battery management system controller integrates motor control functions to supply constant power through pulse width modulation.

A motor control apparatus estimates temperature rise to determine when performance assurance conditions are met for the next start time.

Switching regulator controls brake coil voltage via periodic diagnostic feedback, resolving the trade-off between SIL3 safety integrity and power consumption.

Selective phase switching prevents voltage rise between direct current terminals during overcurrent events, protecting semiconductor switches from destruction.

Dynamic motor current adjustment protects voltage sources from overcurrent while maintaining torque capability in electric power steering applications.

Preheating power semiconductors via controlled current flow adjusts thermal state before operation.

An electronic control unit detects short-circuit failures using phase potential detecting circuits and high-impedance inverter outputs.

Controller limits motor current to protect transmitting device from excessive torque while maintaining drive capability.

RF tags store position correction data for linear conveyor carriages to enable precise motor control.

Dual threshold comparators trigger immediate shutdown for severe overcurrent while allowing noise masking, reducing device size by removing CPU reliance.

Periodic Hall effect sampling of rotor position controls bidirectional AC switches, reducing energy consumption during startup.

Independent phase coil windings driven by H-bridge unipolar inverters eliminate common connections, minimizing power harmonic and reducing audible noise.

Segmented stator modules with dedicated bridge circuits prevent total system failure when individual coils malfunction.

Parallel modular frequency converters enable wide speed control of motor-generator machines in pumped storage plants.

An energy extraction circuit reroutes main field current through a dissipator, reducing the L/R time constant and clearing load faults.

A motor controller circuit generates sine drive signals for electric motors using a low pin count design.

A generator side converter arrangement segments fundamental and harmonic current errors into parallel controllers to determine operation parameter references.

Position interpolation estimates intermediate rotor locations from a single sensor, eliminating multiple sensors while maintaining measurement precision.

A noise removal circuit adjusts its amplification factor via a current mirror to suppress spike noise in motor drive signals.

A condition monitoring device synchronizes magnetic flux, vibration, and stator current measurements to calculate rated power parameters.

A method determines integration periods based on ambient noise parameters to record measured values during electric motor operation.

Motor drive electronics apply excitation signals to phase combinations and measure resulting currents, isolating faults without external test equipment.

A rotary machine control apparatus adjusts maximum current limits to compensate for braking torque in normal systems.

A motor driving circuit uses a digital filter to remove high-frequency error signal components while an upper limit setting unit constrains the input value.

A motor controller detects power transmission unit abnormalities using single-rotation and rotation angle signals.

A fault detection system for adjustable speed drives uses DC link voltage and desaturation control to identify ground faults across all three phases.

A motor control unit generates periodic signals at selected frequencies to suppress specific torque ripple components.

A control apparatus manages switching elements in AC rotary machines by reversing arm states to maintain operational stability.

A multi-degree-of-freedom electromagnetic machine uses distinct stator trajectories to generate controlled rotation about perpendicular axes.

A soft turn-off circuit uses a pre-charged capacitor to discharge stray capacitance during switching transitions.

Driver circuit IC integrates pull-up resistors to monitor motor relay terminal voltages within a compact ECU package.