Speed Controller TRIZ Cases

Isolated reversible DC/DC converters balance charge across module chains while supplying separate vehicle buses for low-voltage and autonomous loads.

Predictive reverse current braking counters travel motor inertia during deceleration to prevent wheel spin and ground digging.

Switching between Y-connected and open-end windings improves voltage utilization, torque coverage, and motor-drive efficiency.

Two torque-rate limit modes help an EV suppress wheel slip on uphill roads while still building enough motor torque to prevent rollback.

Pseudo-clutch and gearshift inputs feed an MT vehicle model so EV motor torque can mimic manual driving feel without a real transmission.

Monitors driving state, fuel cell status, and motor-battery limits to estimate pure electric power with less dashboard fluctuation.

Real-time hybrid tire sensor data lets the processor adjust wheel motor torque to match tire condition, slip, and terrain changes.

When a crash is predicted, battery cutoff, motor stop, and capacitor discharge work together to prevent back-EMF spikes and short-circuit currents.

When battery charge drops, the control unit blocks sport mode unless combined output can match normal-mode acceleration.

Threshold-based regenerative braking holds downhill vehicle speed near a set value while avoiding excessive braking and preserving charging efficiency.

Wheel and vehicle acceleration feedback adjusts regenerative torque on rough roads to limit slip and avoid ABS or DTC intervention.

Temperature-based torque redistribution between two vehicle drives limits overheating while preserving total torque availability.

Calculating route energy thresholds from grade, speed limits, and available output helps a reduced-power vehicle reach its destination safely.

Estimated center-of-gravity shifts are offset by left-right motor torque correction to suppress yaw and maintain vehicle stability.

When battery charge is too low for the planned route, the navigation system assigns energy-saving sections automatically to extend driving distance.

Cyclic reduction and increase of generator braking torque stabilizes regenerative braking under changing road conditions and reference speed errors.

Switching between dynamic load ratio and rear-biased torque split helps 4WD vehicles keep traction on snow while improving handling.

Adaptive damping torque based on wheel inertia and motor speed fluctuation sustains energy recovery on bumpy or slippery roads.

Dynamic ABS thresholds keep regenerative braking active longer, improving slip control, vehicle stability, and energy recuperation.

Gradual motor torque ramping preserves rear-wheel slip control while creating a virtual shift feel for electric vehicle drift mode.

Distinct transition speeds in two rotating machines smooth EV wheel-drive torque drops during command switching, improving comfort and redundancy.

Route-based power splitting between the grid and onboard battery cuts rail vehicle losses, lowers energy cost, and reduces battery wear.

Stored driver profiles let the EV auto-select manual or automatic control modes at startup, avoiding repeated setting changes.

A control device filters simulator-style vehicle settings through pseudo shifting logic so a BEV can deliver customization without unsafe motion changes.

Sensors and control logic shift converter switching frequency away from resonances to cut train cabin noise and vibration.

A speed- and target-torque-based threshold detects unintended negative torque in motor drives and triggers power reduction to prevent unstable vehicle travel.

Predictive torque limiting keeps wheel motors below rated output before high-load events, suppressing heat rise and preserving drive performance.

Driver-specific braking thresholds reduce regen cycling at steady high speeds, improving energy capture and EV range.

A drive unit controller uses zero-speed and motor inputs to hold vehicle position on steep inclines until accelerator demand rises.

A switchable indicator lets one EV shifter map fixed positions to different virtual gears, expanding torque choices without extra shift positions.

Cold-start power is drawn from the high-voltage battery through a DC-DC converter, cutting low-voltage battery size without risking engine start.

Torque correction based on coupling dynamics reduces towing-induced longitudinal vibration while preserving smooth EV acceleration.

Multiple sensor inputs help a bicycle controller estimate travel resistance more accurately and maintain stable component control despite sensor deviation.

A predictive controller coordinates steering and motor forces to limit lift, pitch, and roll while preserving rapid acceleration and direction changes.

A disturbance observer and torque vectoring motor control wheel slip in split-μ starts without sacrificing driving force or stability.

A controller changes speed, pedal, and motor torque mapping after pseudo shifting to complete manual-style EV shifts within a set time.

A split traction architecture boosts one battery DC link to medium voltage while keeping another low-voltage path to cut weight and converter cost.

An integrated inverter and cascaded DC-DC charger cuts EV hardware cost and space while using PIR and PFM control to reduce charging current ripple.

GPS and map data create battery headroom before downhill segments, capturing more regenerative energy and reducing friction brake wear.

Split high-side and low-side cooling branches let EV inverter modules scale current capacity without added length or complex mounting.

A first motor adds compensation torque during HEV upshifts to reduce acceleration loss when transmission disengagement interrupts driving power.

Selective motor coupling and shutdown based on load and steering angle cuts EV axle energy loss while preserving traction when needed.

Motor torque control and pedal reaction force recreate manual-transmission clutch feel in EVs without mechanical clutch hardware.

A radially offset inverter case on a common axle motor cuts harness count while preserving PCB area and avoiding interference in tight work vehicle spaces.

Preplanned engine, fuel cell, and battery usage cuts fuel burn and battery degradation by factoring route, weather, and thermal limits.

Selective motor activation matches mechanical power demand in multi-motor EVs to cut drag and cogging losses and extend motor life.

Controlled vehicle pitching uses the electric motor to deliver haptic alerts to occupants without added hardware, reducing cost and sound disturbance.

Front and rear limited slip differentials with mode-based motor and clutch control help EVs escape rough roads with better wheel-speed synchronization.

A four-region substrate layout separates DC and AC paths to reduce stray inductance, improve heat dissipation, and limit switching losses.

Splitting each PWM duty cycle between the start and end of a subdivision period prevents transformer saturation and duty-cycle errors.