Speed Controller TRIZ Cases

See how dynamic flow rate adjustment prioritizes power train equipment cooling while utilizing

See how a force-applying obstacle crossing assembly maintains driving wheel positive pressure w

See how an obstacle crossing assembly applies controlled force to the driving wheel, maintainin

See how series-connected windings and multi-inverter switching resolve the low-speed efficiency

A three-level planner splits long-horizon speed optimization and short-range gap control to cut computation while saving energy and maintaining safe distance.

Hysteresis between asynchronous PWM and synchronous five-pulse control stabilizes switching, reducing distortion and overcurrent at speed changes.

Coordinated motor braking and electronic handbrake control lets a new-energy vehicle stop and park smoothly in single-pedal mode.

Separate energy and power battery packs with parallel converters let electric drive vehicles switch output by demand while limiting converter size and weight.

A virtual control input coordinates tractor and trailing units to allocate power by global motion and power capability, reducing losses and latency.

Motor speed-induced voltage change after inverter stop is used to detect power switch on-failure without complex back-EMF control.

Using rear-wheel speed as a reference, this case cuts drive torque when motor speed rises too fast to curb front-wheel slip over speed bumps.

Dedicated heat-sink channels and swirling coolant improve exciter module cooling, cutting thermal stress, size, and derating.

Short- and long-time SOP limits are blended during regeneration to recover more braking energy while protecting the battery from electrodeposition.

A dynamic speed governor adjusts motor torque by travel direction, load, and brake state to improve low-speed maneuvering and battery efficiency.

Brake-request-based creep torque reduction cuts brake squeak and preserves a one-pedal feel across selectable EV drive modes.

Multiple short circuits followed by continuous switch-on rapidly discharge fuel cell residual charge without a relay, cutting space and cost.

When target current becomes unattainable, the control unit cuts torque to a safe level and restores stable electric motor control.

By separating front and rear motor torque regions, this case avoids backlash band entry to cut NVH while preserving EV responsiveness.

Averaging torque over integer waveform cycles improves pulsed electric machine control accuracy, efficiency, and response under varying loads.

Rectifier control tracks battery bus current to handle fast load changes, cutting battery size and weight in hybrid powertrains.

Wheel-slip feedback reduces regenerative braking torque instead of switching fully to hydraulic braking, preserving stability and energy recovery.

A discharge control circuit drives half-bridge power switches in linear mode to discharge vehicle energy accumulators without bulky resistors.

Separate stator winding sets and dual inverter control cut copper loss across motor speed ranges while improving thermal management.

Differential drive steering handles pull drift first, with EPS backup to widen compensation range, reduce motor blocking, and improve vehicle stability.

Automatic switching between main and auxiliary power sources keeps storage bin transport robots running through recharge cycles with minimal downtime.

Dynamic mode switching routes charging current through the least-stressed inverter path to reduce neutral switch stress and extend lifespan.

Redundant control units and an electric pressure supply keep EV brake pressure precise and deceleration available even after component failures.

A dynamic warning threshold based on temperature-rise risk gives drivers more time before EV motor torque limiting begins.

Brake hold and motor torque are coordinated using road gradient and vehicle weight to prevent rollback on slopes and sudden starts on flat roads.

Selective open-circuit control cuts switch current when DC voltage stabilizes and motor speed is low, reducing heat during overvoltage events.

An onboard power connection lets an EV motor run from an external source when the battery is absent, depleted, or installed later for safer assembly.

Leg selection based on output current and accumulated run time keeps a vehicle DC-DC converter efficient while balancing wear across converter legs.

By placing paired motors between the running wheels, this bogie frees central space for onboard devices while maintaining stable curved-track travel.

A front-biased torque split of 50% or more stabilizes 4WD deceleration when regenerative braking transitions to friction braking.

Switching between two-level and three-level inverter modes limits midpoint voltage fluctuation, cutting harmonics and motor loss.

Motor position sensing tracks brake touch points on an unused axle, enabling force-sensor-free air gap setting despite wear and temperature changes.

Pedal input, sensors, and a controller replace chains and cables with direct motor drive, cutting maintenance while keeping responsive e-bike control.

A one-side jointed integrated case enlarges inverter space while cutting seals, fasteners, size, and manufacturing cost.

An intermediate support bracket near the swing center cuts BEV motor power cable motion, reducing fatigue and vibration without limiting suspension travel.

A preloaded clutch between the motor housing and ring gear slips under severe loads to protect EV drivetrain components without overdesign.

Overlapping DC rails on opposite switch sides cut loop inductance, lowering switching losses and enabling faster inverter switching.

By selecting the trajectory with the lower peak speed, acceleration, or jerk, mover transport cuts energy use, wear, thermal load, and collision risk.

Yaw-moment feedback adjusts front and rear axle torque during steering to curb understeer and oversteer and improve vehicle stability.

A recessed inverter, offset PN line, and integrated ferrite core shrink the drive unit, simplify wiring, and improve vehicle mountability.

Residual acceleration torque is reduced when accelerator input drops to zero, keeping the forklift stationary after insertion maneuvers.

A molded metal sheet and dielectric seal shield inverter housing gaps, improving EMC while simplifying assembly and removing extra EMI seals.

Regenerative brake torque is adjusted from propulsion torque use and vehicle speed to keep deceleration consistent across changing vehicle loads.

A single motor, differential, and two electromagnetic clutches coordinate rear-wheel steering and braking modes while avoiding multi-actuator failure issues.

Upper and lower control limits let multiple electric powertrains share battery power independently without supervisory control or inter-unit communication.

Front wheels are brake-held while rear-only torque is enabled, allowing intentional BEV line lock without triggering traction-control fault codes.

Weighted fusion of flux-current and inverter power-balance estimates improves electric machine torque accuracy across low and high speeds.

By alternating powered motion with inertia-driven coasting, this case cuts fuel use and extends travel distance without costly hybrid or battery systems.

A hybrid active-passive EMC filter on a flexible PCB and laminated busbar cuts inverter size, cost, and cooling burden in vehicle drives.

Stacked conductor rails and positioning features let single-phase inverter modules scale power capacity without degrading commutation.

Virtual gears and temporary torque pulses recreate gearshift feel in electric vehicles without adding a mechanical gearbox.

A stationary-state button trigger adds start-up motor boost without extra controls, simplifying pedelec operation for frequent urban stops.

By detecting transmission deformation and speed difference, this case controls motor torque to suppress EV gear rattle, vibration, and noise.

Trip data is decomposed into rolling, aerodynamic, braking, HVAC, and altitude-related losses to trace EV energy use without extra sensors.

Sensors and a shaft motor generator counter wave-driven torsional loads on marine propulsion shafts to stabilize engine load and cut fuel use.

One watchdog chip monitors two EV control chips, enabling cross-checking, motor shutdown, and reset control with lower cost and complexity.

Temperature-based switching between synchronous and asynchronous rotor modes limits magnet demagnetization and preserves vehicle motor torque.

Shared power paths inside the housing cut EV cable count, routing complexity, weight, and connector cost while feeding the inverter and other devices.

A control circuit pre-discharges the battery through a resistor grid before downhill regenerative charging to protect battery life and reduce brake wear.

Dynamic deadtime switching prevents minimum-width PWM pulses that degrade EV inverter switches while preserving full duty cycle range.

Prediction-driven resistor braking lowers battery SOC before downhill travel, preserving regenerative braking capacity and reducing mechanical brake fade.

A two-phase flyback charging scheme precharges a DC link capacitor quickly while limiting overcurrent and overvoltage without extra resistor paths.

Shared wheel-speed sensor routing gives each brake controller access to all wheel data, cutting extra sensors, wiring, and signal delay.

A three-branch inverter supply keeps safety control and switching active during HV or LV faults by isolating failures and using backup DC/DC power.

High-frequency current, voltage, and position sampling improves EV trip carbon estimates while reducing cloud bandwidth load.

Dividing a vehicle travel route into traffic-based sections enables separate consumption models that improve energy prediction accuracy.

Pre-race battery heating for drag runs and cooling for track events helps electric vehicles balance burst power with sustained energy supply.

Rotation sensors and controller logic keep pedal and drive wheel positions synchronized, improving pedaling feel and torque response on slopes.

A force sensor, low-pass filter, and regulator let a powered trailer counter tow-bar load, easing uphill and downhill handling without pushing the vehicle.

Resonant acoustic excitation recreates gear-shift sound in electric vehicles, restoring driver feedback and engagement without added hardware.

Reverse torque from the drive motor bridges hydraulic brake pressure buildup in AEB, shortening stopping distance and reducing false triggers.

One-way diode links let motor power buses support auxiliary loads without reverse current, balancing storage charge and reducing short-circuit risk.

A shared EV converter and open-end motor winding layout enables three-phase charging without torque, cutting hardware cost and complexity.

Coordinated railcar mover control combines tractive effort across coupled vehicles to start heavy loads from dead stop with less operator intervention.

Threshold-based switching between one or both parallel power modules cuts converter losses while balancing heat and wear in electric drive vehicles.

Torque pre-load at standstill and continuous motor cooling improve EV launch response while limiting wheel slip, losses, and overheating.

Two electric machines and a disconnect clutch let an EV power take-off deliver the required rotation direction and speed, even at low vehicle speed.

By running the traction motor inefficiently before downhill braking, the battery gains headroom for regen and heavy-duty truck friction brakes last longer.

Real-time tire temperature feedback shifts braking force between regenerative and friction braking to limit wear dust while preserving energy recovery.

Acoustic signals are monitored during driving so operating parameters can self-adjust to cut excess noise without adding weight or changing load performance.

Torque vectoring corrects yaw from vehicle misalignment in in-wheel systems while equivalent steering angles help detect defective wheels.

Multiple capacitor types are arranged on one substrate to improve thermal balance, cut parasitic losses, and reduce stress on power switches.

Route-based control selects among braking, onboard, external, and inter-vehicle charging to improve fuel efficiency and reduce battery degradation.

A separate torque control input lets EV drivers fine-tune motor torque and switch between automatic driving and manual shift simulation.

Selective coil back-EMF discharge paths improve EV charging relay on-off accuracy while minimizing EMI noise and inrush-related control issues.

Dynamic motor power limiting based on slope and battery charge helps working vehicles avoid undervoltage and protect traction circuitry.

Alternating charge and discharge loops through series-connected dual-motor windings raise low-temperature battery heating efficiency while limiting switch stress.

Real-time torque correction uses vehicle status, gear state, and safety constraints to improve turning stability and ride comfort.

By placing the battery and charging unit below the cargo bed, this pickup PHEV preserves cabin and cargo space while fitting high-voltage hardware.

Periodic transverse current heats battery active material through the motor windings while maintaining speed, torque, and low rotor stress.

Offline RNN training and in-vehicle FNN inference cut measurement and computation load while improving electric drive control stability.

Fault-level control disconnects a failed front or rear drive unit so the healthy axle keeps vehicle speed and usable drive capacity.

Wheel-speed feedback cuts outer-wheel propulsive force during turns to prevent slip, spinning, and unstable cart maneuvering.

Predictive battery power consumption creates regeneration headroom before an upshift, reducing motor synchronization lag in vehicle transmissions.

Dual handle force sensing independently controls each hub wheel, improving wagon maneuverability, terrain adaptability, and braking safety.

Bandpass-filtered motor speed feedback adds counter-torque to damp drive-line oscillations without extra hardware.

Protrusions on the front integrated electromechanical unit and framework member limit rearward crash motion and help prevent battery pack contact.

A PTO-linked e-axle lets one electric motor drive tractive elements, accessories, or another axle to cut vehicle weight and motor cost.

Pre-positioning the electric machine rotor boosts zero-speed launch torque on grades while avoiding oversized inverters and added losses.

Cell-level h-bridges and DC/DC converters enable a two-phase vehicle drivetrain that cuts hardware cost, raises voltage, and improves EMC.

Anticipatory reverse torque slows the travel motor during external deceleration to prevent wheel spinning and digging-in in working machines.

Model-based torque shaping crosses the driveline lash zone quickly to suppress hybrid vehicle vibrations without adding slow control delays.

Overlapping sequential driveline actuator shifts make left-right wheel engagement predictable while cutting EV 4WD shift time.

Braking energy is diverted from the DC link to onboard loads when grid feedback is prohibited, reducing friction brake wear and stabilizing voltage.

Current-sensor feedback detects abnormal ripple-current heating in power storages, helping prevent overcurrent and improve inverter reliability.

Periodic PWM carrier-cycle changes shift current harmonics toward the higher-inductance axis, cutting AC motor noise and loss.

Alternating current in a dual-motor battery loop boosts self-heating rate while avoiding motor redesign and extra heating hardware.

When a highside switch fails closed, closing the inverter lowside switch trips the fuse fast and protects the charging power source.

Coupling-force dynamics reveal ground conditions so towing vehicles can adjust traction only when needed, cutting fuel use and stuck risk.

Continuous yaw-moment and differential-torque control stabilizes high body slip angle drift while reducing abrupt behavior and estimation sensitivity.

When wheel lock raises switching-device temperature, the controller shifts from torque to speed control to help the vehicle clear level differences.

Motor inductance and inverter switching raise or lower DC plug voltage, enabling portable peer-to-peer EV fast charging above 50 kW.

Adaptive powershift control limits current and torque when temperatures rise, reducing thermal stress on electric machines and power electronics.

Variable gear ratios keep a synchronous reluctance motor in efficient operating regions, extending constant power and improving low-speed torque.

A master-slave control allocator splits combination and unit control, avoiding re-development when vehicle configurations change.

GPS and IMU route prediction lets EVs trigger regenerative braking before pedal input, recovering more kinetic energy and extending range.

A dual-leg secondary circuit with coils, diodes, and capacitive isolation enables deeper voltage step-down while maintaining insulation and lowering switching current.

A second battery precharges the electric circuit before main relay closure, limiting inrush current and preventing voltage-gap damage.

A controller simulates clutch and gearshift effects in an EV to deliver MT-like driving feel while reducing manual operation burden.

Control allocation is adjusted using isolated battery pack states and engine temperatures to improve eVTOL energy use and thermal management.

Instant forward-reverse motor torque switching lets an EV rock out of stuck conditions with one pedal while avoiding gear-shift delay and wear.

Reverse torque from the drive motor bridges hydraulic pressure build-up delay in AEB, shortening braking distance and reducing false triggers.

Machine-learned terrain and route features estimate EV power use more accurately, keeping travelable area maps aligned with current battery performance.

Limits regenerative braking torque by driving mode so hydraulic and motor braking stay stable on rough roads and avoid ABS or DTC triggers.

Rotor angle sensing with a rotation lock lets the control unit detect axle drivetrain wear in operation and support proactive maintenance.

A two-stage flyback and forward supply powers upper and lower bridge arms separately, shrinking transformer size and saving vehicle space.

When coolant runs too hot, the control unit shuts down the electric oil pump drive circuit to prevent overcurrent and thermal stress.

Current-drop monitoring detects conductive gaps before voltage loss, enabling load and power response to prevent shutdowns and arcing.

Real-time torque, speed, and temperature monitoring redistributes load across dual e-axles to balance damage and extend component life.

A parallel-axis motor, planetary gear, and differential layout reduces component interference and suppresses radial size in vehicle drives.

Motor and excitation winding Joule heat warms the EV battery pack without a separate heater, cutting space use and heating cost.

A stop waveform smoothly shifts motor torque from travel to standstill, reducing torsional release vibration and braking discomfort.

Placing the power conversion unit under the vehicle floor shortens routing members and makes onboard power distribution more compact.

Object detection and yielding metrics unlock battery reserve only for considerate riding, reducing conflicts on shared personal transport paths.

By tracking discharge power integrals and energy over time, the BMS allows short power bursts without undervoltage or faster battery aging.

Automatic transfer case switching engages four-wheel drive on slopes to prevent parked 4WD vehicles from sliding without brake system changes.

A restricted friction-zone strategy adjusts drive torque and slip speed to keep rail wheelsets out of torsional vibration conditions.

Separate sum and difference models track straight and cornering states, simplifying left-right drive control while reducing vibration and slippage.

Intermittent charging on a locomotive power bus maintains traction power while cutting fuel use, emissions, and continuous engine operation.

Visual speed variation and audio cues simulate engine startup so drivers can clearly perceive the shift to variable-speed EV driving.

A touch-sensitive steering wheel starts hill descent control only after prior enablement, reducing button clutter without slowing access.

Dynamic current thresholds let a mower shed secondary loads before battery overload, preserving drive power and battery life.

Adaptive torque change timing uses shock tolerance to shorten wheel torque transitions while reducing vehicle body shock and occupant discomfort.

When regenerative torque drops at high battery charge, hydraulic brake compensation maintains smooth coasting deceleration and vehicle stability.

Pre-launch torque limiting while the brake is applied prevents traction motor and power electronics overheating, then restores full torque at release.

When a train under-brakes on snow or other low-adhesion track, predicted stop locations trigger new run curves to keep following distances safe.

Selectable regenerative braking and creep torque improve EV stop control, parking drivability, passenger comfort, and energy use.

Varying d-axis core and bridge cross-sections balances magnetic flux, reducing saturation-driven torque pulsation over a wide operating range.

Shared transmission coils and switchable connections cut footprint and power interference while preserving accurate wireless stage positioning.

A hybrid traction inverter staggers Si IGBT and SiC MOSFET turn-on above a current threshold to balance efficiency, cost, and fault tolerance.

A control unit uses motor temperature and temperature gradient to limit e-bike drive power early, avoiding abrupt shutdowns and damage.

A low-voltage inverter test mode checks motor windings and cabling before high-voltage connection to catch isolation faults early.

During low-temperature regenerative braking, switched current capture and a braking resistor divert pulse feedback current to protect lithium-ion batteries.

Road curvature and weather data guide automatic speed and wheel-angle control, helping vehicles stay stable on curves when lane markings are unclear.

By comparing actual and reference torque-current characteristics, this EV control case detects motor control parameter shifts and torque abnormalities.

Selective front and rear oil pump control cuts two-wheel-drive power loss while preserving motor cooling and lubrication before 4WD demand.

Shorted motor windings add passive damping in steer-by-wire handwheel actuators while control compensation preserves torque capability.

Current vector control in dual-motor EVs suppresses beat noise and vibration without changing in-wheel motor hardware.

Incremental torque search helps a locked EV motor clear steps while limiting phase overheating and avoiding added clutch hardware.

Placing the train power bus circuit breaker in attic space cuts added support parts, wind noise, and roof appearance issues.

Torque spikes applied before gear flank changes cut clicking noise in EV transmissions without noticeable drivability impact.

Trip-aware control distributes torque across multiple motors and regeneration paths to cut battery use, overheating, and mechanical losses.

A protected controller layout between the motor and attachment improves collision resistance while simplifying cable routing and reducing outboard size.

Multiple battery assemblies feed separate motor buses, isolating faults and matching power delivery to different vehicle load demands.

Torque is shifted to one drive motor near standstill, reducing wheel-speed mismatch, vibration, and wrong-direction creep during braking.

Touch-based propulsion curves let drivers tune electric motor speed and acceleration while preserving simple operation and real-time feedback.

Adjusts battery output limit warnings by driving mode so automatic acceleration control avoids unnecessary alerts and driver anxiety.

A controller decelerates an electric wheelchair downhill when regenerative charging current rises too high, protecting battery capacity and range.

Route-aware gear selection across multiple electric drive axles balances acceleration demand, motor efficiency, load, and surrounding traffic.

PI control cuts regenerative torque to zero during ABS events, then ramps it back to keep wheel slip low and coasting stable on low-friction roads.

Sensor-based control adjusts axle torque and EPAS input from vehicle attitude to prevent wheelie or roll on inclined surfaces.

Selective magnet pocket combinations let one motor platform vary torque output while avoiding major redesigns and added packaging length.

Guide portions and a buffer align the motor during mounting, preventing harness interference and surface scratching on the support.

A shared speed-command path lets interlocked EV motors stay synchronized, reducing output mismatch, heat generation, and efficiency loss.

Real-time power and transmission adjustment cuts abrupt acceleration, lowers EV energy use, and preserves driving quality.

Lower automatic-mode speed limits plus overload and collision detection help carts avoid unsafe travel while preserving manual-mode productivity.

Acceleration-based control switches a working machine between motor assist and power generation to balance torque, battery use, and cooling load.

Off-center transformer placement balances forces at aligned control-terminal joints to suppress substrate bending during vibration.

A split-circuit bidirectional DC-DC converter uses controlled switching to match high-voltage function with lower-voltage components at lower cost.

Adjusting the filter capacitor voltage target shifts braking operation toward asynchronous mode and suppresses electromagnetic noise.

Battery current is adjusted from driving data and internal resistance changes to cut EV energy waste during autonomous driving.

Gate and drain voltage feedback lets the controller detect inverter drive faults quickly and prevent secondary failures during control.

One drive unit cuts gear backlash while the other follows target torque, reducing noise and impact without sacrificing vehicle acceleration.

A mathematical engine-creep model lets the electric motor mimic torque-converter behavior, keeping hybrid vehicle creep predictable on slopes.

Sensor-driven control combines point clouds and SLAM to detect obstacles, handle stairs, and automate parking or recharging.

Soft turn-on, zero-current switching, and liquid-cooled wide-bandgap circuitry cut inverter heat while enabling flexible AC output phases.

An on-board device checks turnout direction against branch access rights, improving safety and flow where closely spaced points strain block sections.

A single operating lever changes role by rail vehicle mode, cutting separate controls, maintenance burden, and functionless lever states.

A switchable mechanical power path lets one EV motor drive wheels or auxiliary units separately, reducing stationary power waste and preserving range.