Speed Controller TRIZ Cases

Independent wheel slip modules cap motor torque and use service brakes to prevent wheel spin while preserving heavy-duty vehicle maneuverability.

Selectable manual and automatic torque scaling adapts regenerative braking to traction events and road conditions for better vehicle stability.

Dynamic load sharing across multiple fuel cells meets power demand while keeping each unit in its efficient range to reduce degradation.

By holding motor speed at clutch engagement and resuming acceleration later, the controller prevents sudden surges and wheel lift.

Charging cable state detection lets a hydraulic excavator keep limited low-output motion during charging to prevent cable damage and electric shock.

Operators can customize a ground-speed PTO map to decouple PTO speed from fixed vehicle acceleration and improve work flexibility.

Using a motor-battery charge-discharge loop, this case shows adjustable impedance heating that cuts cost, improves efficiency, and lowers peak current.

By comparing IMU or GPS motion data with motor speed, this case detects brake lockup in golf vehicles and triggers torque reduction.

SOH-based operating areas let an EV controller switch power and charging between two batteries to balance usage and preserve durability.

Alternating AC d-axis current at motor stop spreads phase and inverter heating, helping low-temperature battery warm-up meet thermal demand.

Speed-based speaker control sends pseudo engine sound outside only at low speed, improving pedestrian notice without adding unnecessary noise.

A shared pump and series motor-inverter water jackets simplify cooling passages while maintaining effective thermal control in electric propulsion.

A motor controller briefly exceeds rated peak current within thermal limits to deliver maximum zero-speed torque without wasting transistor redundancy.

SOC-based mode control keeps EV and MT driving feel consistent by switching motor operation before charge limits disrupt acceleration or regen.

A two-mode vehicle acceleration control reaches recognizable acceleration quickly while keeping jerk below a tolerable level.

Separating the charger and power control unit under the seat and truck bed preserves pickup cabin and cargo volume while shortening HV routing.

Multiple fixed-ratio axle drives replace bulky multi-gear transmissions, widening torque coverage while cutting cost, maintenance, and shift complexity.

Counteracting motor torques generate friction heat to warm e-axle lubricating oil quickly while maintaining the target axle torque.

Precomputed target motor speed and segmented PI torque control cut slip-response lag and stabilize vehicles on low-adhesion roads.

Task-based interface integration lets VCU, BMS, and MCU operate independently, isolating software faults while cutting hardware cost.

Road surface recognition lets the vehicle pre-adjust torque for upcoming low-adhesion areas, reducing jerking, slipping, and fishtailing.

Motor and wheel feedback let the inverter adjust axle torque early to suppress drivetrain wind-up and low-frequency oscillations.

Physics-based torque relationships cut a 4D REEV optimization problem to 3D, reducing compute load while improving efficiency and drivability.

Force generators and acoustic emulation recreate ICE-like vibration and sound in electric vehicles using sensor-driven CAN BUS control.

When battery charge acceptance is limited, switching regeneration to the higher-loss motor preserves deceleration and reduces hydraulic brake use.

Selective filtering targets explosion-period torque vibration and disables opposite-phase torque when longer-period variations could be amplified.

By holding engagement speed difference within 10-30 rpm before meshing, this EV transmission control raises shift success and avoids repeat attempts.

Magnetic flux interference between main and auxiliary windings is compensated in one converter, enabling stable dual-winding generator control.

A limited d-axis current keeps phase current signs detectable at zero-torque transitions, reducing torque jumps in vehicle drivetrains.

A speed-based controller pre-engages the motor-axle coupling to cut AWD switching delay, reduce drag, and improve EV range.

Placing the battery, power control unit, and charger above pickup side members preserves cabin and truck bed space while simplifying wiring.

A two-stage target acceleration strategy raises launch acceleration to a recognizable level quickly while keeping vehicle jerk within a comfortable range.

A boosted target acceleration improves pedal response, then smoothly converges to the normal target as pedal change slows to avoid driver discomfort.

A clutch disconnect lets a dual coaxial EV drive module shut off one motor at low torque demand, cutting energy losses while preserving high-torque capability.

Periodic torque modulation at a preset frequency enables faster, simpler EV slip detection from motor speed fluctuations.

An oscillating DC/DC output lets the LV bus detect auxiliary battery disconnection or poor contact much faster without large load changes.

Wheel speed sign changes let the controller restore torque faster after slip control while reducing the chance of reintroducing wheel slip.

Automatic in-situ calibration and pulsed torque control improve electric machine efficiency while reducing NVH tuning time and power loss.

An integrated heat sink and housing layout improves heat dissipation in vehicle control modules while cutting component count and production cost.

A state-machine controller manages peak electric propulsion power across operating states, improving diagnostics and limiting component degradation.

A motor torque relationship cuts REEV torque optimization from 4D to 3D, enabling real-time embedded control with lower computation.

Coordinated vehicle propulsion and trailer regeneration maintain speed while extending EV towing range and easing motor and battery heat.

Direct wheel-end brake control from resolver signals cuts slip suppression delay and helps prevent yaw on low-adhesion EV roads.

A triggerable parking module locks a scooter wheel during powered-on stops, preventing slope sliding without continuous brake lever holding.

Alternating current in a dual-motor charge-discharge loop heats the battery while adjustable impedance cuts peak current and cost.

Slip rate is estimated from tire relaxation length and deformation, enabling accurate low-speed vehicle control when wheel speed pulses are unavailable.

Series-connected motor windings raise battery heating efficiency in cold conditions while alternating loops cut peak current, noise, and overcurrent risk.

Motor speed and torque are used to estimate wheel speed at very low speeds, improving slip control, crawl control, and reverse prevention.

Bypassing a neutral-point switch cuts current capacity needs, reducing switch size and cost while preserving power transmission and voltage equalization.

Monitoring input-output speed mismatch over time lets the controller detect shaft damage early and cut torque before differential seizure.

Battery current, voltage, and wheel rotation are combined to stop a dolly motor only during true slope overload, protecting usability.

A segmented EV tachometer keeps normal rpm readable and shows over-rev state beyond redline without wasting display screen area.

Pre-charging branch capacitors through a DC-DC converter suppresses relay inrush damage while keeping vehicle charging fast.

A single master chip coordinates motor drive, DC-DC conversion, transmission, OBC, and BMS functions to cut hardware cost and system complexity.

A single sampled-voltage path identifies relay state in an EV charging circuit, cutting detector count, space use, and failure risk.

Visual and auditory readiness alerts plus neutral retention help electric marine propulsion avoid unintended startup while staying ready to drive.

Two-motor torque learning compensates engine modeling torque across load regions, improving hybrid EV power control accuracy.

Using the motor controller to heat a cold battery pack while keeping the motor stationary improves low-temperature discharge efficiency without extra heaters.

Selective capacitor and switch reconfiguration keeps three-phase motor torque and speed controllable after element damage for safe limp-home driving.

A timed mode-switch check avoids rapid power-mode changes, keeping auxiliary machines stable and reducing driver discomfort.

Short-range sensors are deactivated when stopping distance exceeds their range, cutting vehicle power use and freeing compute for priority sensing.

Real-time traffic and driver-specific driving cycles help balance HVAC and propulsion loads to cut battery losses and extend EV range.

A series water-jacket layout cools the motor and inverter in one flow path, simplifying passages while maintaining effective thermal control.

At low temperatures, an H-bridge motor drive circulates three-phase current through dual inverters to generate Joule heat and warm the energy storage device.

Dynamic torque gradient adjustment limits wheel speed fluctuation near torque limits, reducing persistent EV vibration and improving ride smoothness.

Verified external carbon-saving events can unlock sport mode, faster charging, or lane access without continuous high-energy vehicle operation.

A physics-based torque relationship cuts 4D electrified powertrain optimization to 3D, reducing processor load while preserving drivability.

A hinge-shaft force sensor measures AGV weight distribution in real time, enabling anti-tipping control without increasing vehicle height.

Feedback control links motor load and target speed to pedal position, keeping variator-equipped working machines stable and efficient.

Real-time battery current control tracks internal resistance changes from driving data to cut energy waste in autonomous EV operation.

A dual-C-rate battery setup uses fast-charge cells to support slower cells between stops, cutting charging time, cost, weight, and battery stress.

Machine-learning control predicts route demand and isolates selected locomotives in real time to cut fuel use and emissions.

Pre-start accelerator input and driver ID enable selective drive restriction to curb unintended acceleration without blocking intended speed-up.

Drive torque is modulated to generate counterforces at the subframe or body, cutting EV cabin vibration and airborne noise from road inputs.

Yaw-rate feedback corrects target speed and left-right wheel speeds to limit understeer, suppress slip, and keep turning radius stable.

Pre-calculated torque profiles cut EV energy use in stop-and-go driving while maintaining smooth acceleration and extending range.

By capping left-right wheel speed difference during turn exit, the controller cuts yaw and line deviation without sacrificing turning performance.

A two-phase electric braking strategy switches from torque control to a jerk-based speed trajectory for smoother, more accurate low-speed stops.

Wheel load and slip-based friction ratio estimation lets electric hauling vehicles detect slippery roads early and adjust motor drive safely.

By holding a wheel loader transmission in a fixed gear during load transport, shift shocks are suppressed and bucket spillage is reduced.

Pre-reserving handovers across adjacent operators' base stations enables reliable route entry and prevents train stops during transitions.

Real-time grip sensing adjusts regenerative braking torque to limit wheel slip while maximizing energy recovery and vehicle stability.

Separate sum and difference models let dual-drive vehicles control left and right torque precisely in straight and cornering states.

Smart switching uses self-discharge and current-use patterns to shift EV peak loads to supercapacitors and extend battery life.

Stepwise motor torque control and continuous simulated engine sound make EV shifting and parked revving feel more like a conventional car.

Maintains virtual shifting feel and simulated engine sound across EV mode changes to avoid abrupt sound loss and driver discomfort.

Dynamic switching between three-level and two-level inverter modes limits midpoint voltage fluctuation, cutting motor loss and switch stress.

Sum and difference control channels decouple feed-forward and feedback torque control to suppress left-right axle vibration in straight and cornering.

Distributed magnetic-ring and capacitor stages suppress SiC-driven EMI in 800 V DC buses while limiting insertion loss and saving space.

A resistor path dissipates excess regenerative braking energy as heat when the battery is full, preserving braking performance with less brake hardware.

Historical power tracking switches load between battery and supercapacitor to handle peak demand while protecting vehicle energy safety.

Dynamic torque mapping adjusts EV regenerative braking by speed, pedals, and terrain to mimic ICE engine braking feel.

Open-clutch neutral mode disconnects the second electric drive module, cutting gearbox losses, battery use, and wear without wheel-end hardware.

Processor-controlled motor torque enables faster EV gear changes without pseudo clutch input while preserving virtual vehicle drivability.

Alternating left-right wheel torque helps an EV escape stacking in automatic operation while reducing road cutting and motor load.

A prioritization scheme adjusts control surfaces and actuator commands to reduce aerodynamic loads, torque, and actuator stress in electric aircraft.

Compensates brake LSD torque loss on split-μ roads by adding correction torque, preserving longitudinal acceleration without extra driver input.

Reduced motor speed with full hydraulic pressure calibrates clutch fill timing to avoid torque spikes and incomplete transmission.

A consist controller splits power and braking commands between electric and fuel-based vehicles to ease bandwidth limits and avoid costly upgrades.

Segmented power card bus bars shorten DC-AC current loops, cutting inductance, copper use, and inverter manufacturing cost.

Cathode exhaust air from a vehicle fuel cell is reused for pneumatic devices, cutting separate compressor, filter, weight, and power demands.

A pedal-mapped current limit lets electric drive units switch from speed to torque control, reducing wheel slip in low-speed high-load operation.

A terminal block supports and aligns DC link capacitor terminals during fastening, eliminating extra fasteners and assembly tools.

By splitting a vehicle cost function into smaller control problems, this case improves powertrain control accuracy while limiting model complexity.

Historical deceleration data from connected vehicles sets target braking recovery by road section, cutting brake pedal use and improving efficiency.

Geofences and motion sensing let utility vehicles lower speed, acceleration, and deceleration only during unstable maneuvers.

Precomputed efficiency maps let a motor inverter choose PWM, switching, and voltage settings that maximize efficiency across torque and speed.

Predicted road slope and pedal depth are used to generate real-time torque curves, improving terrain adaptation, smooth driving, and fuel efficiency.

Sensor-detected road artifacts trigger HMI coast-down prompts so EV drivers decelerate earlier and recover more energy through regenerative braking.

Sensor fusion predicts road signs, moving objects, and coast-down distance to adjust EV regenerative braking without driver intervention.

A braking fault triggers temporary high regenerative torque even at full charge, preserving stopping force while avoiding battery abnormality.

Controlled low-speed torque lets an electric motorcycle switch forward or reverse for safer parking, with less battery drain and motor wear.

A pseudo shifter and multi-gear transmission coordinate motor torque and wheel torque to balance strong launch force with high-speed BEV driving.

Dynamic axle torque distribution uses driving data and map-based control to limit wheel slip while preserving regenerative braking efficiency.

Collision logic checks new movement limits and transport unit dimensions before use, preventing emergency stops in long-stator transport.

Adjusted rpm limits let the inverter reduce torque during regenerative braking, improving slip control and brake coordination.

A pseudo-clutch pedal and shifter let an EV simulate manual-transmission torque and pedal feedback for a familiar driving feel.

Tilt-based speed limits help an electric drivetrain detect unsafe output speed on uneven terrain and trigger a safe operating state.

An S-shaped lateral wire harness layout adds length margin in tight EV rear space, reducing stress from drive unit swing and easing maintenance.

Auxiliary linear motor propulsion boosts heavy freight train speed on shared rail lines while fitting existing track standards and platoon control.

Controller-driven interaxle energy transfer balances battery charging, axle propulsion, and brake absorption for responsive work vehicle speed control.

Motor windings, inverter, and a three-port transformer are reused for AC and DC charging to cut EV power electronics size, weight, and cost.

Dual three-phase inverters switch motor windings between OEW and Wye modes to improve torque across speed ranges with fewer circuit parts.

Separate chambers, ferrite filtering, compliant pads, and resistor placement cut inverter heat, vibration, and EMI while improving longevity.

Body tilt and angular velocity are used to slow wheel rotation near stairs, reducing collision impact while keeping smooth movement.

Power switches actively discharge a DC link capacitor by lowering gate-drive voltage to limit current and avoid component damage after shutdown.

Open-loop torque and feed-forward speed offset help an EV motor overcome static friction and reconnect to the driveline with smoother synchronization.

Separate powered EV compartments transfer power and detach mid-route so loads still reach their destinations when one unit runs low on charge.

Coaxial clutches and an integrated planetary layout cut drive unit width while preserving multi-speed ratios and tractive effort.

Thermally coupling the inverter discharge circuit to a cooling module cuts resistor heating, size, and cost while maintaining fast HV discharge.

A dynamic reference axle speed lets railway brake control detect slip or skid even when all wheels on one vehicle are affected.

A self-contained wheel traction unit combines motor, storage, power electronics, and sensors to cut ICE retrofit cost while improving efficiency.

Dynamic force feedback helps operators manually guide heavy mobile robots around obstacles while maintaining alignment and control.

Coaxial dual motors, four gear pairs, and two clutches enable uninterrupted shifting, wider torque-speed coverage, and better EV comfort.

IMU-based steering assist adjusts wheel motor speed by gain profile to keep a lawnmower on course over slopes and uneven terrain.

Axial-load-based torque limits on dual electric LSDs reduce wheel slip and preserve driving force when front and rear wheel traction differs.

Voltage checks at the smoothing capacitor detect stuck-ON battery switches before parallel connection can trigger short-circuit current.

A split main and sub control architecture pre-calculates wheel targets so motors and brakes can correct slip faster on each wheel.

Sequential axle lash crossing with coordinated motor torque shaping reduces clunk, shuffle, and torsional wear in dual-axle EV drivetrains.

Left-right wheel torque is corrected by driving mode and steering input to balance roll suppression, ride comfort, and sporty handling.

Sensors track driver muscle fatigue and clutch use, then trigger seat massage only when thresholds and driver permission are met.

Front and back laser welding replaces aging sealing rings in a power module cooler joint to create a complete sealed fluid path and reduce leakage risk.

Automatic cable reeling and guide control let hybrid tractors use grid power in the field while reducing manual handling risks and diesel use.

Closed-loop d-q current control uses unipolar triangular three-phase current to heat the battery efficiently while limiting unexpected torque, noise, and vibration.

A dual-interface input shaft and clutch-shifted transmission let this electric axle fit more vehicle platforms while improving efficiency and regeneration.

Real-time motor-speed-based current frequency control prevents jitter and vehicle vibration during battery self-heating in EVs.

An independent monitor channel derives motor speed from inverter command signals, cutting common mode errors and resolver interface complexity.

Sector-based power control uses vehicle dynamics and track route data to boost acceleration while managing battery charge for shorter lap times.

A gravity-offset torque component helps one-pedal vehicles hold speed on grades while fading out as pedal demand rises.

A prolonged joystick tilt in switch-off mode lets users change maximum speed securely without extra controls or unintended changes during travel.