Speed Controller TRIZ Cases

A timed restart delay lets vehicle diagnostics finish after OFF before ON, preventing false fault determinations and preserving reliability.

Rogowski-coil current sensing detects partial discharges and load current together, enabling converter control that protects motor insulation.

Drive torque is adjusted from trailer speed and wheel-speed-derived articulation angle to prevent jackknifing without extra sensors.

Voltage changes in a first capacitor reveal a stuck second relay in a BEV, enabling accurate fault detection without motor torque output.

A double closed-loop observer uses delayed wheel and motor speed signals to suppress EV startup and braking judder with smoother torque control.

State-based torque distribution balances left-right yaw control and front-rear loss minimization to improve EV mileage without sacrificing stability.

Temperature-based gate and PWM control speeds inverter bus discharge during faults while keeping power switch heating within safe limits.

Configurable inverter modules supply AC to the main load while generating secondary voltage for DC loads and efficient battery cell balancing.

Coupling-force sensing at the tractor-trailer link reveals ground conditions, enabling traction, axle, tire-pressure, and drivetrain adjustment.

A disconnect-coupled twin electric drive unit cuts switching losses while preserving regeneration and stable torque delivery on uneven terrain.

By tuning motor current and carrier frequency during driving, the EV drive system generates useful heat without separate PTC heaters.

A clutch-controlled powered trailer axle matches towing vehicle wheel speed, easing tow load, improving fuel use, and recharging its battery.

Multiple small high-speed motors and reduction gears deliver low-speed torque, smoother high-speed power, and fewer gear shifts.

Route-aware predictive control blends fuel cell and battery power using dynamic cost tuning to improve FCEV range, drive response, and component health.

Forecast-based weather resistance modeling estimates road-segment energy use and adjusts vehicle electrical loads to avoid battery deficits.

Motor-driven rear axle braking replaces wear-prone handbrake hardware, enabling fast dynamic braking while recapturing kinetic energy.

A resistor linked to the electric machine dissipates braking energy as heat when the battery is full, preserving EV braking capability.

Route-based travel control sets target battery charge at each charging-zone exit to prevent power depletion in work vehicles.

A controlled preloading step limits gear approach speed to reduce backlash noise, vibration, and jolts during EV direction changes.

Simulated train operation enables joint verification of the on-board controller, electromagnet controller, and electromagnet to cut maglev failures.

Continuous road friction estimation captures minor slip and sets a torque limit for better drive wheel acceleration and stability.

Dynamic switching of active traction lines cuts battery energy use while preserving required traction power and adhesion in railway vehicles.

Adaptive low-pass filter weighting tracks battery aging more accurately, improving traction battery capacity estimates and discharge power control.

Front and rear wheel torque commands bypass the backlash band to prevent gear hits, reduce NVH, and keep EV response sharp.

Real-time yaw rate, speed, and sideslip feedback adjust front and rear axle torque split to extend drift duration and improve safety.

Pedal tilt sensors modulate battery motor drive for forward and reverse propulsion, cutting noise, emissions, and operator fatigue.

Slope-limited front and rear motor torque commands evade backlash bands during mode transitions, reducing NVH while preserving EV responsiveness.

A boost-then-dip motor torque profile speeds pedal vehicle gear shifts under load, reducing wear and torque loss.

A virtual MT model and pedal reaction force control let EVs mimic clutch feel and shift behavior for drivers used to manual transmission.

During low-speed PRND garage shifts, the controller filters motor torque to zero smoothly, preserving drive comfort before quadrant protection engages.

Outer-wheel torque fluctuations are raised during turns to signal low-grip conditions and help prevent understeer and spinning.

Dynamic series-parallel battery module switching keeps traction voltage aligned with motor needs as charge drops, preserving drive power.

Switchable rear freewheel clutches cut friction losses in low-load driving while preserving traction and torque support when demand rises.

Uses motor-based tertiary braking to maintain deceleration when primary or secondary brake-by-wire functions fail.

Parallel DC/DC converters and switches reroute auxiliary power to critical vehicle loads during faults, cutting cost while maintaining supply.

Torque compensation is rate-limited during axle-by-axle ramp entry to prevent overcompensation and keep one-pedal driving smooth.

Encoder-based trolley braking holds position accurately, then short-circuits an overheating motor to create self-locking braking and prevent drift.

Modular fixed and variable traction units let trains change formation quickly while preserving power redundancy and starting acceleration.

When battery SOC nears charge or discharge limits, motor control shifts from MT to EV mode to preserve consistent acceleration and deceleration.

A heating control module preheats and regulates battery temperature by mode and ambient conditions to avoid derating in high-demand driving.

Real-time battery and engine temperature monitoring guides eVTOL control allocation to balance thrust demand, energy use, and thermal stress.

Different forward and reverse torque change rates in low-speed mode help a straddle vehicle better match rider intent and control feel.

Threshold-based brake intervention keeps vehicle acceleration and deceleration predictable when regenerative braking is limited or unavailable.

When a retarder or other heat source runs, the controller limits fuel cell heat to available cooling capacity to stabilize power and reduce deterioration.

Dynamic aircraft charging control balances battery charge loss and generator fuel consumption to improve cruise-phase power distribution.

Adaptive control switches between electric and human power using rider goals and sensor data to improve efficiency and ride smoothness.

Separating requested torque into sum and difference models suppresses left-right axle vibration without complex decoupling control.

Modular H-bridge stages balance cell voltages and cut PWM-related loss, heat, and high-voltage stress in EV inverters.

Reusing an electric power steering motor in a low-speed EV drive unit improves reliability in harsh environments while cutting development time and cost.

Virtual EMF sensing uses in-vehicle power data to reshape EV driving profiles and cut electromagnetic emissions and energy use.