Ac Motor Stoppers TRIZ Cases

When a machine brake fails or is overloaded, converter switches and a short-circuiting module dissipate back-EMF to hold elevator speed and position.

Reverse current between selected motor phases enables precise braking and prevents abnormal fan backspin when a fan is removed.

Separating shutoff and speed-based diagnosis from the driver circuit enables motor fault detection and stop across varying driver specifications.

Three-phase voltage sensing checks elevator contactor closure quality and detects abnormal contacts with a simple, low-cost safety circuit.

Regenerative motor energy powers inverter-based dynamic braking during elevator manual rescue, improving stability without oversized motors.

Selective switching in three-phase motor braking dissipates back-EMF energy while limiting return to the battery and protecting electric tools.

Active intermediate-circuit voltage control feeds braking energy back to series battery packs without overloading individual power supply devices.

Selective phase short-circuit braking for BLDC compressor motors limits current, preserves position sensing, and reduces mechanical stress.

Stored capacitor energy keeps the controller switching low-side switches after power loss, extending braking and preventing damaging voltage feedback.

Selective two-phase short-circuit braking keeps one BLDC phase open for back-EMF position tracking while limiting current and wear.

Kinetic energy from the permanent magnet motor powers damping control during voltage interrupts, avoiding passive losses in normal operation.

Dual braking control applies strong motor braking during kickback and gentler trigger-off braking to shorten stop time while limiting recoil.

A short-circuiting module discharges stored regenerative energy to limit back EMF and motor speed when the elevator machine brake is insufficient.

Manual bypass switching keeps elevator motor dynamic braking active during brake release, delivering stable torque in power outages.

A delayed low-frequency reverse phase sequence brakes lightly loaded motors faster, demagnetizes remnant flux, and limits current.

A parallel impedance path supplements the brake resistor to limit DC-link overvoltage and prevent excess energy from damaging the drive system.

Encoder duty cycle switching between half- and full-cycle timing preserves speed resolution and stable inverter motor control.

A fail-safe relay shorts motor leads when unsafe loading or kinetic energy release is detected, enabling controlled exercise machine stopping.

A controller adjusts inverter overcurrent thresholds based on motor rotation speed to manage switching device protection levels.

A bypass unit transmits input power to a motor driving unit, maintaining active braking functionality during normal operation.

Dynamic speed adjustment prevents brake resistor overload while reducing weight and cost.

Localizing brake control circuitry to specific axes reduces manufacturing costs while maintaining braking reliability.

A trigger-based control method adjusts electric motor duty ratios using dynamic smoothing coefficients to manage power delivery.

A motor driving control apparatus short-circuits three-phase coils to stop rotation without external power.

Soft start control gradually charges capacitors through current-adjusting elements, preventing hot-swap surge damage to connectors.

Lower arm switch inversion eliminates additional electronic components and reduces manufacturing cost.

A braking control unit applies force to a vehicular opening by supplying driving power with a locked conduction phase to the motor.

Shorting motor coils via a brake loop generates a magnetic field that stops the rotor, eliminating wear and pollution from mechanical damping.

A motor driving device calculates dynamic braking current and Joule heat to predict relay life without a separate current detection unit.

Dynamic parameter monitoring restores powered assistance earlier than timer-based methods, reducing delays during auto stop-start cycles.

An electronic field effect transistor circuit replaces mechanical relays to eliminate contact bouncing and arcing in electric power steering systems.

A motor braking mechanism applies predetermined resistance to windings to halt movable parts without external locks.

A drive system inverter uses parallel impedance circuits to dissipate excess energy from the intermediate circuit.

A motor control unit short-circuits coils using counter electromotive force for independent braking.

Replacing semiconductor switches with a mechanical circuit breaker reduces temperature sensitivity and radiation exposure in high-altitude drive systems.

Parallel mechanical and semiconductor switches in a motor drive dynamic braking circuit.

A motor controller executes short-circuit braking by reversing induced voltage polarities at specific electrical angles.

Replacing expensive relays with MOSFETs reduces costs and increases switch lifetime while recovering energy via the inverter.

A motor arrangement uses a control circuit to couple windings into a closed current path for electromagnetic braking.

Stator induction generates braking current to halt inertia-driven rotation, preventing safety risks from continued fan movement.