Speed Controller TRIZ Cases

Machine learning predicts wheel slip or grip to switch motor speed correction and suppress drive shaft torsional resonance on uneven roads.

A standardized drive controller calculates nominal power from resistance and motor behavior to keep vehicle performance consistent across platform variants.

A timed blend between short- and long-term derating curves lets vehicle motors sustain higher torque at elevated stator temperatures without winding damage.

Software profiles align EV capabilities with petrol torque, vibration, and sound characteristics to deliver a realistic driving feel.

Asymmetric front and rear drive control keeps boost-converter power within rating while reducing battery size, cable diameter, and losses.

An oblique inverter mount guides upward displacement in a frontal crash, avoiding brake booster contact and protecting dash panel space.

Differential wheel-speed control uses turning-force detection to ease wheelchair turns and reduce caregiver grip effort.

Onboard trailer sensing compares incline-based passive deceleration with actual deceleration to add torque or regenerative braking without tow-vehicle communication.

A controller selects between detachable dual-voltage batteries using motor RPM, torque, and power to reduce losses and extend EV driving distance.

Uses the traction inverter, motor inductance, and an insulating DC/DC converter to charge 400V, 800V, and AC sources without extra boost hardware.

Selective auxiliary battery switching extends EV driving distance without higher motor-system voltage and keeps the vehicle running after inverter failure.

One bi-directional converter charges the traction battery and powers rotor windings, cutting EV cost, weight, and isolation complexity.

A feedback torque correction anticipates lash crossings in EV drivelines to cut oscillations and NVH without continuous motor preloading.

When motor temperature or load crosses a threshold at low speed, brake hold secures the EV and enables a smooth torque-based release.

Artificial sound is tied to required torque instead of pedal input when control modes change, keeping EV sound aligned with driving state.

Variable height suspension and sensor control let a self-powered dolly align fifth wheel height for faster trailer coupling and better handling.

A dual-channel mower control network reroutes module communication after bus or wire harness faults and helps pinpoint failure locations.

When EV torque control decouples sound from pedal input, mode switching keeps artificial audio aligned with the actual driving state.

Driving preferences are used to set battery temperature, charge limits, speed limits, and charging options in a clear EV charging plan.

A parallel capacitor supplies excitation reactive power in a two-winding induction generator, cutting converter capacity and cost.

Controller-based contactor testing and pre-charge control enable safe series-parallel battery pack switching while limiting inrush current.

A backup control unit switches the converter to suppress smoothing-capacitor overvoltage and keep an EV in limp-home mode after failure.

A speed-dependent torque band keeps EV drivetrain gears in contact, cutting gear rattle noise without maintaining high torque continuously.

Motor windings and excitation current heat the EV battery pack without a separate heater, cutting space and cost while improving heating efficiency.

Predicted phase current and disturbance voltage corrections help an inverter suppress motor control noise and improve AC machine stability.

An insulating resin plate covers capacitor terminals near the control board, preventing short circuits while shrinking power converter housing.

A trained allowed-zone controller predicts vehicle motion from user inputs and sensor data to keep personal mobility vehicles on safe paths.

Filtering suspension pitch frequency from front and rear regenerative braking commands helps prevent wheel slip during load transfer.

A single VFD independently runs traction and PTO motors in EVs, cutting inverter count, wiring, cooling hardware, and packaging space.

A multilevel flying capacitor inverter transfers power between mixed-chemistry battery packs by using motor inductance for DC-DC balancing without rotation.

Real-time bushing displacement feedback limits drive unit torque to reduce NVH and prevent mount wear and fatigue.

Electromagnetic wheel clutches disconnect EV drive motors during towing to prevent back-EMF, uncontrolled charging, and drivetrain damage.

Adaptive low-pass filtering uses front-rear angular acceleration differences to estimate road gradient and vehicle speed during four-wheel skidding.

Real-time bias control balances generator and battery current limits to protect charge and discharge stability in hybrid electric aircraft.

A lateral power controller layout and recessed side surface lower EV drive-unit center of gravity and improve frontal collision load transfer.

Motor coolant heat is routed to battery coolant while the motor runs off-axle, warming the battery without a separate heater.

Dynamic motor output-limit control enables high-speed torque vectoring with two wheel-drive motors, improving steering stability without extra controllers.

Reverse-operated GaN or SiC transistors generate controlled waste heat through the cooling circuit to warm traction batteries without local overheating.

A vehicle motor controller avoids torque commands that trigger ripple at critical speeds, cutting vibration and audible noise.

An interchangeable primary drive lets one road machine use diesel, battery, fuel cell, or external power to meet local emissions rules.

At low vehicle speed, the meter switches from power to torque percentage so uphill hold conditions do not show 0% despite motor effort.

During generator failure, altitude-based battery control cuts non-essential loads and restores thrust later for controlled aircraft landing.

Individually controlled suspensions adjust axle height, load distribution, and fifth wheel position as the dolly switches between towed and towing modes.

A laterally mounted power controller and recessed transaxle side surface lower EV center of gravity and guide frontal collision loads.

Route-segment speed profiling adapts an energy-efficient vehicle track to route conditions and vehicle specs, cutting energy use and extending operation time.

A staggered, overlapping driveline actuator sequence fixes random wheel engagement order and cuts EV 2WD-to-4WD shift time by about 70 ms.

Vehicle state checks let the battery sensor block invalid auxiliary charge requests, reducing repeated wake-ups and battery discharge.

Maintaining a specified speed difference lets a hybrid drive engage its second clutch smoothly during transition from electric torque converter mode.

Zero-crossing timing calibrates phase current sensor gain factors for more accurate motor current control and wider inverter tolerance.

Stacked positive, neutral, and negative buses cancel magnetic fields to cut parasitic inductance, ringing, EMI, and switching loss.

Heat from the active discharge circuit is routed through a thermal interface into the DC link capacitor and coolant channel, saving PCB space.

Predictive EV disconnector control uses road and vehicle signals to cut unnecessary switching while improving efficiency, stability, and comfort.

Limits motor torque change during regenerative mode switching to keep braking force consistent with driver expectations.

Automatic virtual downshifting at large steering angles keeps steering-mounted shifter control usable and acceleration smooth after turns.

A locking groove and lever section keep the clutch sleeve engaged under high stationary torque, helping prevent rollback on slopes.

Alternating charge-discharge through a winding heats the battery pack internally, cutting heat loss, warm-up time, and temperature non-uniformity.

By comparing estimated motor parameters and correcting torque gaps, this case improves EV straight-running and turning stability under temperature variation.

Power-loss maps and speed thresholds guide torque split across multiple EV motors to cut energy use without causing oversteer or jerk.

Virtual engine, clutch, and transmission models pre-adjust motor torque to smooth EV shifting and shorten clutch re-engagement time.

When steering angle grows in a battery EV, automatic virtual downshifts keep paddle-style shifting smooth and support acceleration out of corners.

A front-to-rear fan airflow layout cools forklift motors and the controller while also aiding battery cooling without water-cooling complexity.

A nested shaft gearbox lets two e-bike motors share one compact output path, improving space use and torque distribution with less transmission bulk.

Direct signaling between vehicle and motor control units cuts torque response time and reduces wheel slip on icy or snowy roads.

Hold assist torque counters gravity on slopes, then hands off smoothly to driver demand torque to prevent rollback and jerky EV starts.

Road segment and state-of-charge control keep regenerative braking available on long descents, reducing wheel brake fading in electric trucks.

Separate drive shafts route motor torque on different gearbox sides, saving e-bike frame space while enabling flexible combined drive.

A radially outboard motor power unit and heat exchanger improve cooling, reduce EMI, and simplify aircraft propulsion servicing.

Real-time voltage and current feedback lets one switching circuit handle EV charging and motor drive while preventing abnormal power states.

Slip-ratio feedback adjusts regenerative motor torque and friction braking to restrain wheel slippage while maintaining power recovery.

Balances fuel cell, battery, and engine power in real time using KPI-based control algorithms that cut computational burden.

Internal and external driving data trigger regenerative, main, and parking braking to counter unintended EV acceleration and stabilize control.

A 48V PTO motor-generator shifts power between the driveline and storage to enable regeneration without high-voltage vehicle complexity.

Monitored pump pressure and drive speed trigger automatic braking when faults develop quickly on sloped mobile working machines.

Sequentially shifting standstill holding from motor torque to service brakes at individual wheels cuts creak and vibration on gradients.

Pseudo engine sound is adjusted to vehicle load weight, making EV sound output better match torque demand and driving feel.

A vehicle charging circuit switches between direct and step-down charging based on battery health and voltage difference to limit degradation.

Wheel-speed feedback cuts hydraulic pressure when road resistance drops during ABS, reducing wheel lock and preserving EV stability.

When a shared processor fails, the drive circuit reads stored vehicle parameters and characteristic data to maintain motor control across vehicle types.

Temperature-threshold control lets parallel SiC MOSFET and Si IGBT modules share operation to cut inverter losses across current ranges.

Virtual differential speed control adjusts pseudo shifter reaction force to reproduce manual gear changes in an electric vehicle.

Differential wheel driving force cuts turning radius in parking and U-turns while displaying the expected path to reduce driver confusion.

Variable pulse frequency control cuts motor NVH while preserving operating efficiency through real-time table selection.

During curve-entry deceleration, pseudo gear shift control keeps virtual engine speed in the torque band to preserve EV exit acceleration.

Parallel motor and inverter water jackets cut cooling pressure loss, enable smaller pumps, and allow flow tuning to each heat load.

Rapid pedal input during deceleration suppresses braking force, enabling smoother one-pedal re-acceleration without driver discomfort.

Sequential gear-ratio changes across two electric propulsion lines keep axle torque continuous while the other line shifts.

Mounting multiple inverters on battery housing side surfaces simplifies multi-motor power distribution while saving space and improving vehicle balance.

Dynamic fuel cell power setpoints keep operation near peak efficiency, cutting hydrogen use and extending EV range without larger tanks.

A pseudo manual shift paired with a selectable low-speed gear helps a BEV deliver higher driving force on steep grades and off-road terrain.

A stacked positive, negative, and neutral bus layout cancels mutual inductance to cut ringing and EMI in T-type multilevel inverters.

IMU-based pitch and roll sensing adjusts golf cart speed, acceleration, and deceleration limits for safer hill travel without slowing flat routes.

Tracks whether a replaceable working machine battery stays within a set area, enabling alerts or restrictions to deter misuse or theft.

Load sensing on a passenger occupancy element detects overload and shifts the vehicle into reduced-function mode to prevent unsafe use.

A timed relay keeps the data collector powered after shutdown to capture final motor data, then cuts current to avoid wasted battery power.