Electric Motor Control TRIZ Cases

Comparator-controlled solid-state switching cuts torque tool power before thermal fuse response, limiting MOSFET faults and thermal damage.

Voltage-divider fault detection in an H-bridge motor drive identifies shorts and opens while cutting circuit size and detection power.

Blanking current feedback after Hall sensor changes suppresses negative spikes and stabilizes DC bus voltage in single-sensor motor drives.

Separate processing circuits correct steered angle commands against sensor differences, preserving precise feedback control and redundancy.

Blanking current data after Hall sensor phase changes lets a single-sensor motor drive stabilize current control and DC bus voltage.

Current-based calibration sets actuator end-travel limits from measured fault position, reducing wear-related inaccuracy and damage risk.

Rotor rebound speed after each impact is used to stop tightening at a target torque, avoiding direct torque sensors and added complexity.

A dual-source battery and energy storage circuit powers motorized shades while limiting average battery current to extend service life.

Motor speed is adjusted from valve control signals to match hydraulic flow demand, cutting recirculation losses without starving actuators.

Voltage measurements on open-circuit winding sets reveal flux linkage ratios that detect PMSM rotor demagnetization without complex analysis or historical data.

Electromagnetically coupled rotors shift power between gas turbine spools while cutting converter burden and added machine weight.

A transistor-based clamp dissipates trapped shutdown energy as heat to limit DC bus overvoltage in compact power tool motor drives.

Open-circuit winding voltage reveals rotor demagnetization in multi-winding PMSMs without complex analysis or large historical datasets.

A dual-MCU interface cuts digital isolator count between motor power and control units, saving board space while preserving insulation.

Periodic drive-time checks restrict sheet conveying motor operation before overheating, simplifying temperature control and improving reliability.

Current response to applied winding voltages reveals motor magnet temperature without rotor position sensing, reducing measurement complexity and cost.

Battery-temperature-based control adjusts PWM duty cycle and ramp-up to protect cordless tool packs while maintaining usable motor power.

Dynamic compliance compensation torque helps EPAS overcome manufacturing variation, improving steering feel, responsiveness, and stability.

Combining multiple Class 2 outputs powers a garage door opener beyond the 6-foot outlet limit while maintaining NEC-compliant installation.

Increasing freewheel periods between commutations flatten phase current, improve low-speed sensorless control, and reduce rotor demagnetization risk.

During motor lock, current is redistributed across inverter arms to cut surge voltage, protect switching elements, and limit heat.

Motor torque is checked through the motion cycle to validate actuator control parameters before use, helping prevent lifespan loss and failure.

Overmodulation PWM lets sensorless three-phase BLDC motors keep positional detection while raising output and cutting switching heat, noise, and vibration.

Load-triggered motor state switching keeps power low for stable positioning, then boosts output under sustained load to cut vibration and wear.

When one multiplexed axial gap motor fails, one-way clutch isolation blocks its torque path and keeps wheel power from the remaining motors.

Motor current after a DESAT fault identifies the failed inverter switch, enabling control that limits asymmetrical currents and vehicle yaw.

Phase-voltage ADC sampling over N periods improves Back-EMF detection at high BLDC speeds while reducing power use and torque ripple.

Dynamic switching between dual brake power modules cuts unnecessary motor drive losses while preserving redundancy and braking reliability.

Switching between square-wave and PWM drive cuts stepper motor heat, noise, and battery drain in thermal printer operation.

Temperature sensing on motor phase wires detects inverter connection faults more accurately than AC current summation under ambient variation.

Dual orientation sensors let the controller disable the motor when a foldable handle and chassis are in unsafe positions.

Adjusting inverter switching frequency by motor operating point helps prevent motor and inverter overheating while maintaining efficient EV operation.

Dynamic motor power allocation keeps a rollable flexible display moving smoothly without exceeding battery output and causing sudden shutdown.

Complementary PWM control across opposite-phase multiphase windings cancels common mode emissions and reduces EMI filter weight.

A motor controller and watchdog relay disconnect the handheld knife power pack when operating data departs from safe conditions, reducing wear.

A modular connector with interchangeable outputs lets one motor management platform fit different switching setups while preserving fault detection and protection.

Tracks motor control failure frequency to detect fuel pump abnormalities and adjust control parameters to avoid motor stoppage.

A controller alternates upper and lower short-circuit paths in single-mode motor drive to balance inverter switching-device load.

A split three-level inverter uses lower-current horizontal switches and mode switching to cut harmonics, cost, and low-torque losses.

Current harmonics, PCA, and Mahalanobis distance detect converter and machine faults without extra sensors or added weight.

By detecting when PWM pulses fall below MOSFET turn-off time, this case cuts current ripple, audible noise, and vibration near zero current.

Current-ratio monitoring across two isolated multiphase machines detects winding faults early without extra sensors or historical data.

A shared changeover switch lets one motor shift between open-end and closed-end winding modes to balance high torque with fuel efficiency.

Dual control loops adjust PWM duty cycle to keep USB Type-C current within 5 A during BLDC motor startup and dynamic loading.

Multiple sensors track transistor board hot spots, letting local PWM adjustment prevent shutdown while maintaining inverter operation.

Mixed PWM and active short-circuit control identify failed inverter arms in open-end winding drives while maintaining machine operation.

Phase voltage difference monitoring detects single-alternator faults at the rectifier input and enables safe remote rotor current control.

Selective winding sector activation lets one electric machine platform deliver different torque and power levels with lower manufacturing complexity.

Identification data sent over the motor power line lets the driver pair with the correct encoder and establish reliable servo communication.

By estimating supported mass from motor voltage, this case adjusts gains and acceleration to prevent overcurrent and keep print heads level.