Electric Motor Control TRIZ Cases

Vibration and magnetic flux density sensing estimate electric motor output power without current, voltage, or torque sensor access.

Current-threshold commutation replaces slow off-phase position sensing, enabling faster and more reliable startup of sensorless single-phase motors.

Microprocessor-controlled voltage modes reshape the DC motor torque-speed curve to raise maximum torque and maintain efficiency.

Power-based winding temperature estimation with cooling-water offset correction suppresses lock-state motor heating without unnecessary torque limits.

Frequency programmable flux channels redirect rotor magnetic flux to raise torque and power density without enlarging the motor.

Automated test signals and voltage checks verify adaptor protection and power-supply behavior under normal and abnormal charging conditions.

Direct motor voltage regulation replaces PWM in a single-coil motor driver, cutting EMI and noise while maintaining speed control.

A calculated sinusoidal drive voltage with Back-EMF and motor parameters cuts current ripple, noise, and vibration in stepper motors.

A single control pin detects voltage and current conditions, enabling auto-trim over-current protection without extra pins in power generators.

Powering sensors shortly before motor start and after stop preserves detection readiness while reducing energy use and sensor wear.

Force-based disassembly detection blocks powered tailgate movement when partially detached, reducing trapping risk and damage.

A single drive with shared current sensing keeps parallel synchronous motors balanced, rejects power perturbations, and avoids overcurrent damage.

Motor Back-EMF powers active damping in a steer-by-wire handwheel actuator, maintaining steering stability during power loss with lower energy use.

Rotor resistance estimates are mapped to motor thermal state to detect abnormal rotor heating and trigger alarms or power cutoff before damage.

Encoder slippage and coasting signals reveal motor wear in MR-compatible infusion pumps, enabling warnings and startup lockout before failure.

Temperature sensors placed between dual power conversion circuits improve thermal fault detection and limit current before EPS overheating damage.

Independent monitoring and separate power supplies detect abnormal drive signals early and stop motor output before faults propagate.

Phase-current and stator-signal sensing enables earlier insulation fault detection in electric machines with less fault-state data.

Two static magnetic sensors and an analog switch simplify EC motor start and nominal commutation while avoiding complex control electronics.

Variable averaging of induced Back-EMF voltages improves low-speed rotor angle and speed estimation for reliable sensorless startup.

An ECU shifts hybrid aircraft propulsion into degraded mode when one power source falls short, preserving torque control and conserving battery energy.

Reverse motor rotation at startup initializes the sensor system quickly, enabling fast torque delivery without disturbing vehicle operation.

A brief reverse motor current initializes sensors and motor parameters at startup, avoiding torque delay and enabling immediate e-bike drive readiness.

Two separate power paths encode fan speed through a frequency converter, enabling ventilation retrofits without rewiring or mechanical changes.

Synchronized coil switching enables wireless power transfer and precise motor voltage control without radio-link delays or moving power cables.

Adaptive motor current control tunes vehicle door closing speed at the initial detent to cut noise, clamping forces, and sealing issues.

Contact-pressure sensing switches motor speed and percussive mode to prevent unintentional actuation and improve tool control.

Merged sensor and motor data over one HDSL cable removes separate sensor wiring while improving reliable condition monitoring in drive systems.

By checking whether the rotor is already moving during initial position estimation, this case stabilizes sensorless motor startup in image forming equipment.

A valve-controlled split oil path cuts unnecessary motor cooling flow, improving power efficiency while preserving lubrication and rapid warm-up.

Multiple steer-by-wire drive systems share steering load and switch output after a failure to keep wheel turning without oversized hardware.

Phase relationships and current amplitude peaks identify slip-related frequency lines more accurately under noise for real-time machine condition monitoring.