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.