Electric Motor Control TRIZ Cases

System compares torque curve areas against reference values to detect impending failures early, reducing operational downtime.

A current mirror circuit directs proportional current to a parallel consumption part, resolving Zener diode breakdown voltage variations that limit dissipation.

A control device estimates permanent magnet temperature using stress-corrected armature interlinkage magnetic flux.

A rotational angle detection circuit uses Hall elements and phase detection to determine substrate position.

An adaptive filter adjusts smoothing factors based on heating trends to limit current and prevent overheating in electric power steering motors.

A BLDC motor control method samples back EMF signals during undriven periods to interpolate zero crossing points for rotor position estimation.

Sampling phase current rates and amplitudes during freewheeling periods computes rotor angular position without mechanical sensors.

An electric drive controller stores optimal inverter output voltage and switching frequency values to minimize input power consumption.

A motor control device calculates optimal input voltage to minimize power losses across inverter and converter components.

A rotor phase estimating device applies high-frequency voltage injection and Fourier series development to stator current signals.

A fan control method adjusts rotational speed within a variation range to transform sound frequency patterns.

Calculates piping resistance from motor current and speed to detect pump load states without pressure sensors.

A motor controller detects power transmission abnormalities using rotation angle and speed difference calculations.

A motor drive control device detects open coil states via mid-point voltage sensing to maintain forward rotation during single-circuit failure.

A motor control device switches between sensorless vector and V/f control methods based on rotational speed thresholds.

A digital switching controller generates phase current and voltage replicas using existing control signals to replace analog sensing hardware.

A rectifier control unit adjusts switching device ON periods to manage power flow between AC and DC sides.

A resolver management device generates excitation signals and detects delay times using internal clocks for precise motor control.

A power converter uses a switching circuit to equalize inverter node potentials, enabling continuous motor operation when one inverter fails.

Skipping coil winding turns creates a gap that positions a temperature sensor, eliminating dislocation and improving assembly accuracy.

A current controller adjusts threshold voltage via a scaling factor and PWM module to manage overcurrent signals.

Segmenting control functions between a host and target devices distributes processing load while maintaining motor synchronization.

Smart motor drive detects wiper failures using electrical readings, preventing unscheduled maintenance.

Dissipation circuits mitigate DC bus overvoltages and limit reverse motor speeds during power loss, protecting components from back EMF damage.

A vehicle motor control apparatus applies demagnetization current to permanently remove residual magnetism from the steering motor.

A motor protection system adjusts heat generation parameters based on rotation speed to detect overload states accurately.

Particle swarm optimization estimates generator performance parameters from real-time measurements to detect incipient failures and prevent unplanned outages.

A motor current controller switches an H-bridge circuit between charge and decay modes to regulate current waveforms.

A wiper motor control circuit adjusts driving voltage to match actual speed with target speed, preventing overrunning during operation.

Controller transmits trace start signals to synchronize motor control devices, enabling high-frequency data collection without exceeding memory capacity.

Local processing units analyze sensor data at the drive machine to reduce cabling complexity and enable predictive maintenance for elevator systems.

Gain-adjusted driving signals reduce power consumption while maintaining defined vibration intensity levels.

Estimating coil temperatures via substrate sensors and inter-phase heat transfer resolves measurement inaccuracies in electric power steering systems.

A vehicle seat motor control device adjusts target rotational speed based on driven object position to ensure unified movement.

A motor selection device simulates operation patterns to identify the most suitable motor from multiple candidates.

A torque demand signal modifier adjusts the current ramp shape to manage motor drive currents.

A turning apparatus detects motor current changes to reverse pinion gear rotation before damage occurs.

Signal processor detects low PFC input voltage to reduce motor speed, preventing current limit mode stress.

A control unit detects semiconductor defects using braking torque changes to activate an isolating switch.

A semiconductor device dynamically adjusts an overcurrent threshold based on A/D conversion results to stabilize motor current.

A controller executes specific motor start parameters to detect attached tip tool types via current detection.

Dynamic commutation timing based on rotor position controls brushless DC wiper motor speed and torque while preventing overheating under high load.

A BLDC motor driver circuit uses a current unidirectional circuit to detect back electromotive force during startup.

A synchronous motor determines motion information through source voltage and inductance analysis for transport appliance safety.

A thermal model calculates motor temperature from electrical input power and shaft speed without physical sensors.

A level-shifting unit shifts PWM signal high and low levels to set values, resolving recognition errors caused by process variations.

A control device calculates a lock-release slip frequency to exit an induction motor locked state.

A motor control device generates pressure command signals with derivative limits based on elastic constants and maximum speed.

A surgical instrument motor speed control system uses a force-sensitive resistor to vary drive shaft rotation based on applied pressure.

A torque observer estimates magnetic flux to calculate optimal current and voltage instructions, suppressing torque deviations caused by parameter variations.