Multiple Motor Speed/Torque Control TRIZ Cases

See how current-direction-based transistor switching reduces voltage errors and coupling when a

Stored stop current and speed let the controller match restart current to residual load, cutting peak current and start failures.

Integrated power electronics in each compressor, fan, pump, or valve cut redundant supply hardware and reduce EMI from long PWM lines.

A delayed FOC estimation stage identifies rotor speed and position before startup, enabling smooth sensorless PMSM restart during windmilling.

A single-board rectifier, capacitor, and power switch layout cuts tool volume, heat, and failure-prone inter-board connections.

Reverse fan rotation clears dust and hair from hair dryer inlet holes, reducing manual cleaning time and restoring airflow.

Real-time position feedback lets seat slide rail motors correct speed differences, improving synchronization accuracy, stability, and layout flexibility.

A molded terminal connector doubles as a cylindrical baffle to direct coolant around stator end windings, reducing overheating in vehicle motors.

Residual current sensing lets one inverter stabilize multiple sensorless EC motors, reducing sensors, computing load, and speed oscillations.

Reverse fan rotation blows dust and hair out through the inlet, cutting manual cleaning effort while maintaining hair dryer airflow.

A characteristic-function approach estimates PWM converter losses across similar motors by reusing reference motor data instead of repeated measurements.

Motor speed decoupling and torque compensation help a riding lawn mower hold direction and steer smoothly on slopes with less user correction.

A shared half-bridge frequency converter drives three-phase and single-phase motors with less circuitry, cutting space, cost, energy use, and heat.

Staggering excitation timing across multiple sensorless motors cuts power-supply ripple and voltage drop while keeping rotor detection fast.

Shared reference and position data let motor controllers coordinate multiple axes locally, easing host load while improving synchronization accuracy.

Automated identification of feed-forward parameters improves tracking precision, contour fidelity, and mechanical stress control in coupled axes.

Independent wheel-speed control and load compensation help a riding lawn mower hold direction on slopes without costly tire changes.

A single-board BLDC power tool layout cuts inter-board connections and uses heat sinks to reduce size, heat, and failure risk.

Hall sensor feedback adjusts motor duty ratios so two vehicle seats fold or unfold together despite motor and gear speed variation.

A multiplexed controller manages multiple variable-frequency motors through direct communication and signal prioritization.