Speed Controller TRIZ Cases

Multi-level gate voltage control cuts EV inverter switching loss and ringing while lowering junction temperature and conduction loss.

Carbon rings reinforce the rotor against centrifugal force while avoiding lamination bridge flux loss and preserving magnet efficiency.

Redirects hot battery-cell ejecta into a controlled exhaust path, entraining cold air to reduce thermal stress on nearby components.

Dynamic trailer brake gain uses real-time regenerative braking capacity to recover more energy and reduce vehicle and trailer brake wear.

At very low temperatures, the drive motor idles to stir and heat lube oil, improving fluidity for smooth oil pump startup.

Torque is shifted between two EV motors to warm cold transmission lubricant, cut friction losses, and preserve propulsion efficiency.

Corrected longitudinal acceleration helps torque control account for turning, gear state, and active safety constraints to improve stability and comfort.

Real-time impedance reconfiguration lets a vehicle electrical network match changing load conditions, improving power transfer and reducing energy loss.

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

Manual braking is achieved by lowering the reference tilt angle so the motor decelerates the self-balancing vehicle without losing equilibrium.

AC d-axis current alternates phase currents at motor stop to spread inverter heat and improve low-temperature battery heating.

Limits slip-based torque correction to avoid inappropriate wheel torque distribution when tire diameter differences cause differential rotation.

A power-flow-aligned motor and controller layout cuts volume and energy loss while improving power density and reliability in EV powertrains.

Switching between block clocking and space vector PWM adapts regenerative braking to driving conditions, improving energy recovery and avoiding overcharge.

A single guided lever links transmission shifting and motor direction control to simplify operation and prevent unintended forward-reverse switching.

Actuator-aware reference inputs keep propulsion and braking units from working against each other, cutting energy waste in multi-unit vehicles.

Automatic EV mode selection at startup removes control uncertainty while preserving later switching between EV and MT-like motor response.

A controller selects the most efficient power converters while balancing wear, cutting power loss and extending electrical system lifespan.

Sizing fuel cells for average load and batteries for peak demand keeps EV power responsive while improving fuel efficiency and battery life.

When one wheel motor underperforms, steering actuation counteracts torque imbalance to prevent swerving and maintain vehicle stability.

Two drivingly connected reluctance motors deliver independent or combined EV torque while cutting magnet cost, losses, torque ripple, and noise.

Engine and vehicle speed thresholds let the controller detect a blocked start and stop the motor to avoid energy waste and autonomous deadlock.

Two electric machines drive different gears at once during shifts, cutting battery power demand and smoothing dog clutch engagement.

Road-surface prediction lets the controller pre-adjust torque to handle adhesion changes, reducing jerking, slipping, and ride discomfort.

High-frequency wheel and motor speed error analysis identifies road surface properties without extra sensors, improving EV traction response.

Pseudo engine sound pressure is reduced at night in a battery EV to preserve cabin ambiance while supporting safer driving in low-visibility conditions.

Torque is reduced before dog clutch disengagement, cutting shift force, gear change time, and energy use in transmission shifting.

Torque vectoring counters wheel misalignment in in-wheel vehicles, maintaining straight travel and flagging defective wheels until service.

Color-coded energy overlays and safe travel time limits help operators spot trip plan battery deviations and act before adverse situations escalate.

Independent lockstep monitoring detects abnormal motor control states and triggers shutdown to maintain functional safety in vehicle drive systems.

Separate left and right wheel motors improve obstacle handling, slope control, and terrain adaptability in outdoor maintenance vehicles.

By holding engagement speed difference at 10-30 rpm before meshing, this EV shift control raises shift success and removes synchronizer rings.

A programmable pseudo-clutch torque profile switches by vehicle speed to keep high-speed response direct and low-speed acceleration smoother.

Two planetary gear sets let one motor sustain output while the other shifts, avoiding torque interruption and vehicle jerking.

A limited non-zero d-axis current improves phase current sign detection and reduces torque jumps during traction-regeneration transitions.

By switching between coasting and braking torque strategies, this EV control approach captures more motion energy and stores it in the battery.

Priority-based power allocation helps mining machines handle peak demand, avoid overloads, and protect energy sources while keeping critical units powered.

A planetary two-speed EV transmission uses friction clutch switching and torque-thrust actuation to improve high-speed efficiency with less shock.

Gradient correction torque is reduced at higher downhill speeds to avoid excessive deceleration while keeping EV acceleration and braking smooth.

Environmental sensing from camera, radar, and lidar adjusts coasting torque for regenerative braking to improve collision avoidance and energy recovery.

Fleet driving data is analyzed in the cloud to personalize vehicle torque control without overloading legacy in-vehicle controllers.

Adaptive trailer brake gain uses braking force and regeneration feedback to recover more energy during EV towing without compromising stability.

Connected-car data from nearby and preceding vehicles improves congestion detection, reducing repetitive pedal adjustments in one-pedal driving.

An L-shaped case layout houses the power module, capacitor, and wiring to shrink vehicle drive unit height and width without losing mounting space.

A housing that integrates the capacitor core, mounting columns, and liquid cooling cuts motor controller size while simplifying assembly.

A dual inverter and switch network charge two EV batteries from one charger while matching different battery voltages and avoiding torque disruption.

Limiting integrated acceleration error under overshoot conditions stabilizes drive torque and helps protect emission performance.

A built-in disconnection protector isolates a faulty motor controller from the DC bus, preserving power to non-faulty drive systems.

When battery charge is low, this control approach switches from SoC-based range estimation to actual distance traveled to avoid sudden DTE drops.

A modular three-level T-type inverter uses double-side cooled power modules to cut harmonics and improve EV switching efficiency.

A compact switching layout places equipotential chips adjacent and uses stacked connections to cut parasitic inductance, power loss, and noise.

A dual-channel control network keeps mower functions communicating during bus or wire harness faults and helps pinpoint failure locations.

Staged pre-torque and boost control improve EV launch acceleration from standstill while adapting to road grip to limit wheel slip.

Stacked positive and negative terminals in a controller assembly shrink loop area and cancel magnetic fields to reduce stray inductance.

Clusters high-gradient road segments into high-energy areas so vehicle power control can predict uphill demand and avoid battery discharge or needless charging.

Dynamic torque limits based on speed, vehicle weight, and weather help commercial vehicles recover energy without wheel slippage.

A central controller blends service and auxiliary braking from pedal force input to cut brake wear while preserving a direct safety link.

Sequential front and rear motor zero-crossing reduces backlash shock and NVH while preserving EV acceleration response.

Terrain-based pulse and recovery control helps vehicle energy storage meet ascent and descent power demand without exceeding thermal limits.

Active target motion vectors keep steering-induced yaw, roll, and lateral acceleration within controllable limits for smoother ride feel.

When PTO load exceeds shared power capacity, the control unit slows tractor travel to hold PTO speed and avoid standstill.

Dynamic wheel-by-wheel torque allocation keeps regenerative braking active during ABS, improving energy recovery without destabilizing the vehicle.

Opposed stacked connection terminals cancel magnetic fields in AC circuits, cutting stray inductance and improving controller stability.

Dynamic slip targets use steering angle and wheel speeds to bias motor torque, reducing driveline windup and crow hop in multi-motor EVs.

Torque from the electric machine is managed to meet drive demand while keeping the engine at diagnostic torque targets and avoiding inefficient power split.

When propulsion mode is active without a driver request, the control device shifts the electric machine to a non-propulsion state to prevent unintended starts.

Correcting recovery torque with residual fuel cell torque helps EVs decelerate naturally during coasting while preserving energy recovery.

A virtual two-DOF powertrain model estimates damping torque early, cutting EV AEMD calibration time before hardware is available.

When the main battery charge drops, a removable battery and voltage booster can extend driving range while avoiding conversion loss and arc risk.

A control unit shifts power from traction to the electric PTO when speed drops, keeping tractor implements running without stall.

By overlapping the inverter with the motor and output members, this layout uses breather space to shrink drive unit height and length.

Adaptive dual-motor torque control uses battery SoC and motor speed limits to maintain EV stability on split-friction roads.

Switching motor windings between star and delta while using cell-level inverters cuts electric losses and extends EV driving range.

A shared watercraft driveline reads host identifiers and auto-adjusts propulsion and battery settings to match hull characteristics without manual tuning.

Shaft voltage pulsation triggers choke coil current to cancel electromagnetic noise reaching EV drive wheels without enlarging the drive unit.

Dynamic power strategy adjusts fuel cell and battery output to meet aggressive driver demand while limiting battery stress and degradation.

A detachable dual-battery EV setup switches between low- and high-voltage packs by RPM and power demand to extend range and cut power loss.

A stacked inverter-above-output-member layout expands inverter housing space while a separating wall keeps the vehicle drive unit compact.

Cargo weight is estimated from motor output and travel data so pedal torque stays within a target range and pedal feel remains consistent.

Switching electric motor braking modes maintains deceleration when recuperation is limited, while recovering energy or dissipating excess heat.

PWM ON-time control balances current from parallel batteries with different internal resistances, preventing overcurrent and reducing ripple.

Real-time battery power and torque comparison detects abnormal motor output and applies staged limiting to protect drivers, batteries, and MCU parts.

Occupant position and seat-count sensing adjusts EV regenerative braking torque to improve energy recovery while protecting the motor and battery.

Stored travel resistance data lets a BEV match virtual vehicle acceleration and driving feel through more accurate motor torque control.

Electronically controlled suspension adjusts axle height and load distribution so an electric dolly stays stable in both towed and towing modes.

A molded metal sheet around the inverter housing cavity shields housing gaps, improving EMC while cutting seals, parts, and assembly steps.

Shifter-triggered motor maps let a BEV unlock special torque characteristics through driver actions, creating a manual-like driving feel.

Rotational and axial constraints let split foot platforms self-balance without undermining structural stability in a two-wheel electric vehicle.

A test-torque check combines drivetrain engagement and motor rotation detection to confirm torque readiness without unwanted e-bike propulsion.

Combining speed and acceleration change amounts, this case reduces false train wheel slip detection caused by sensor anomalies.

Predictive generator timing uses map position and work progression to supply power before startup, improving hauling vehicle acceleration.

Software control modulates wheel driving and braking forces from a countersteer index to hold EV drift state and rear slip amplitude.

Twisted segmented inverter conductors reduce skin and proximity effects, improving phase current sensing accuracy across frequencies.

Proxy clusters retransmit control data within the same timeslot to overcome RF interference and path loss in wireless battery management.

Dynamic vehicle power planning balances driving range and in-cabin device use by updating energy allocation as conditions and occupant needs change.

Dispersing inverter control units near separate vehicle carts avoids cooler airflow interference, improving cooling in tight underfloor space.

A five-port converter links fuel cell, battery, and ultracapacitor to traction and auxiliary loads with single-stage bidirectional power flow.

A pedal detent holds throttle input near rated power, limiting EV motor heat while preserving acceleration when full output is truly needed.

Mode switching limits battery power by heat and race demand, helping electric race vehicles sustain consistent performance and finish races.

Wheel speeds at both ends of each drive shaft enable linked full-speed torque adjustment to reduce slip and improve vehicle dynamics.

DC charging is routed through motor windings and shared inverters, enabling fast charging of modular EV batteries without high-voltage hardware.

PWM-controlled single-phase battery modules raise charging speed, limit battery heating, and allow charging from a general charger.

Transmission fluid cools a converter inductor while current is limited by shaft speed and switching frequency to prevent overheating and power loss.

Switching stator windings and inverter modes enables faster EV battery charging from AC sources without complex DC fast-charging EVSE.

By blocking hydraulic flow at slipping front wheels and raising brake pressure, this case maintains braking force and stabilizes vehicle behavior.

A motor driver briefly exceeds rated peak current to deliver maximum torque while thermal margin control prevents overheating and transistor damage.

Coordinated regenerative and mechanical braking manages downhill torque demand to hold speed and prevent brake overheating in EVs.

A multi-tap transformer matches motor voltage to speed demand while keeping battery voltage constant to reduce EV high-speed energy loss.

Predictive speed matching readies a decoupled traction machine for rapid recoupling, cutting power delay, wear, and friction losses.

Sequential transformer switching and delayed simultaneous PWM startup cut inrush and harmonic noise while preserving early motor power.

Using one inverter to feed AC to the stator and DC to the rotor cuts converter count and simplifies electrically excited motor architecture.

On-board units request routes and report real-time position and speed, cutting ground hardware cost while improving train control.

A broadband test signal checks the full current sensor chain faster, improves signal separation, and can avoid extra DC sensors.

Schedules vehicle parking so boil-off power is stored in the traction battery while reserving energy to heat the fuel cell after cold downtime.

Maps wheel torque targets to motor torque for platform-independent yaw control while limiting vibration during rapid steering.

Relay ground units use crossing IDs to forward only needed obstruction alerts, cutting ISM-band delay and interference for timely train control.

Waste heat from an active drive unit warms an idled gear train, lowering oil viscosity and reducing BEV drivetrain losses.

Blocking simulation torque changes during EV shift travel mode prevents torque fluctuation and sudden vehicle behavior while driving.

Dual target torque control enables fast regenerative braking after rear-end contact while limiting forward shock and travel distance.

A zero-canceling feedforward torque approach stabilizes rail traction battery current, avoiding oscillations, limit violations, and shutdowns.

During EV stopping, speed-based torque convergence and filtered damping suppress continuous vibration and improve stability on gentle slopes.

Pressurized air keeps the boat cover taut to prevent water pooling, while modular heating and dehumidifying modules protect interior components.

Sequential pre-charge and discharge control lets multi-battery vehicle propulsion switch voltage modes while limiting inrush current damage.

Variable-size cooling spikes create turbulent coolant flow in an integrated drivetrain heatsink, improving inverter cooling without added complexity.

Dynamic switching between pedal-assist and motor-only e-bike modes is paired with external state notification to improve riding suitability and road awareness.

A center differential and planetary gears transfer braking energy between vehicle sides, improving steering efficiency without added motor weight.

Inclination-based speed and turning control plus a detachable frame help a motorized wheelchair handle ramps safely and store compactly.

Torque commands are adjusted from inverter, stator, and rotor temperatures to prevent overheating while preserving EV drive axle performance.

A manual brake deactivation tool, position detector, and notifier keep a work vehicle towable while reminding operators to restore braking.

A motion transmission mechanism converts train brake rotor rotation into stored electrical power while limiting added complexity and maintenance.

Live ECU data shifts BEV refrigeration modes to cut battery draw, preserve cargo temperature, and extend driving range.

A spool, sensor, and controller detect trailer separation early and cut high-voltage or gas flow before conduit damage occurs.

A torsion damper adds controlled play and elastic energy storage to deliver instant launch torque without a clutch or energy-storing rotor.

Motor windings and the inverter boost or buck charging voltage to match the battery, removing a separate DC-DC converter to cut weight and cost.

A switchable drivetrain lock blocks gear rotation when parked on slopes, while preserving torque converter drive and multi-ratio operation.

Shared phase-current sensing lets DC-isolated single-phase converters detect motor direction and speed while preserving fault tolerance.

When travel input is off, sensor-based motor torque counters unintended downhill rolling and keeps electric mobile machines stationary on slopes.

Selective switch states in split stator inverters cut unintended ASC braking torque from back EMF while preserving diode protection.

A wheel-integrated planetary gear and motor layout adds torque and independent tire rotation to improve maneuverability and reduce fuel use.

A controller adjusts inverter gate drive resistance from radio signal conditions to cut RF interference without excessive inverter losses.

Randomized zero-sequence voltage spreads PWM noise energy in electric drive control, cutting cabin acoustic noise without added losses or torque impact.

Cell-level inverters and delta-star switching cut phase current and electric losses, helping extend EV driving range without charging.

Routing the intermediate circuit link through the transformer housing preserves tractive force during converter faults without adding installation space.

Independent trailer wheel torque and regenerative braking reduce sway, improve incline towing, and ease vehicle fuel and control losses.

A dual radiator layout uses a front radiator and roof wind deflector radiator to improve fuel cell stack cooling without sacrificing aerodynamics.

Force sensing lets users quickly reposition an autonomous mobile robot while motion limits protect internal components and restore autonomous mode after release.

Velocity-based trailer drive support compensates drag and wheel friction to extend towing range while limiting unnecessary energy use.

Voltage sensing in adjacent transmitter coils tracks receiver position, enabling smooth coil switching and stable wireless power transfer.

Predefined power ratios shift torque between two EV motors before and during gear changes to maintain propulsion and regenerative efficiency.