Speed Controller TRIZ Cases

See how dynamic flow rate adjustment prioritizes power train equipment cooling while utilizing

See how a force-applying obstacle crossing assembly maintains driving wheel positive pressure w

See how an obstacle crossing assembly applies controlled force to the driving wheel, maintainin

See how series-connected windings and multi-inverter switching resolve the low-speed efficiency

A three-level planner splits long-horizon speed optimization and short-range gap control to cut computation while saving energy and maintaining safe distance.

Hysteresis between asynchronous PWM and synchronous five-pulse control stabilizes switching, reducing distortion and overcurrent at speed changes.

Coordinated motor braking and electronic handbrake control lets a new-energy vehicle stop and park smoothly in single-pedal mode.

Separate energy and power battery packs with parallel converters let electric drive vehicles switch output by demand while limiting converter size and weight.

A virtual control input coordinates tractor and trailing units to allocate power by global motion and power capability, reducing losses and latency.

Motor speed-induced voltage change after inverter stop is used to detect power switch on-failure without complex back-EMF control.

Using rear-wheel speed as a reference, this case cuts drive torque when motor speed rises too fast to curb front-wheel slip over speed bumps.

Dedicated heat-sink channels and swirling coolant improve exciter module cooling, cutting thermal stress, size, and derating.

Short- and long-time SOP limits are blended during regeneration to recover more braking energy while protecting the battery from electrodeposition.

A dynamic speed governor adjusts motor torque by travel direction, load, and brake state to improve low-speed maneuvering and battery efficiency.

Brake-request-based creep torque reduction cuts brake squeak and preserves a one-pedal feel across selectable EV drive modes.

Multiple short circuits followed by continuous switch-on rapidly discharge fuel cell residual charge without a relay, cutting space and cost.

When target current becomes unattainable, the control unit cuts torque to a safe level and restores stable electric motor control.

By separating front and rear motor torque regions, this case avoids backlash band entry to cut NVH while preserving EV responsiveness.

Averaging torque over integer waveform cycles improves pulsed electric machine control accuracy, efficiency, and response under varying loads.

Rectifier control tracks battery bus current to handle fast load changes, cutting battery size and weight in hybrid powertrains.

Wheel-slip feedback reduces regenerative braking torque instead of switching fully to hydraulic braking, preserving stability and energy recovery.

A discharge control circuit drives half-bridge power switches in linear mode to discharge vehicle energy accumulators without bulky resistors.

Separate stator winding sets and dual inverter control cut copper loss across motor speed ranges while improving thermal management.

Differential drive steering handles pull drift first, with EPS backup to widen compensation range, reduce motor blocking, and improve vehicle stability.

Automatic switching between main and auxiliary power sources keeps storage bin transport robots running through recharge cycles with minimal downtime.

Dynamic mode switching routes charging current through the least-stressed inverter path to reduce neutral switch stress and extend lifespan.

Redundant control units and an electric pressure supply keep EV brake pressure precise and deceleration available even after component failures.

A dynamic warning threshold based on temperature-rise risk gives drivers more time before EV motor torque limiting begins.

Brake hold and motor torque are coordinated using road gradient and vehicle weight to prevent rollback on slopes and sudden starts on flat roads.

Selective open-circuit control cuts switch current when DC voltage stabilizes and motor speed is low, reducing heat during overvoltage events.

An onboard power connection lets an EV motor run from an external source when the battery is absent, depleted, or installed later for safer assembly.

Leg selection based on output current and accumulated run time keeps a vehicle DC-DC converter efficient while balancing wear across converter legs.

By placing paired motors between the running wheels, this bogie frees central space for onboard devices while maintaining stable curved-track travel.

A front-biased torque split of 50% or more stabilizes 4WD deceleration when regenerative braking transitions to friction braking.

Switching between two-level and three-level inverter modes limits midpoint voltage fluctuation, cutting harmonics and motor loss.

Motor position sensing tracks brake touch points on an unused axle, enabling force-sensor-free air gap setting despite wear and temperature changes.

Pedal input, sensors, and a controller replace chains and cables with direct motor drive, cutting maintenance while keeping responsive e-bike control.

A one-side jointed integrated case enlarges inverter space while cutting seals, fasteners, size, and manufacturing cost.

An intermediate support bracket near the swing center cuts BEV motor power cable motion, reducing fatigue and vibration without limiting suspension travel.

A preloaded clutch between the motor housing and ring gear slips under severe loads to protect EV drivetrain components without overdesign.

Overlapping DC rails on opposite switch sides cut loop inductance, lowering switching losses and enabling faster inverter switching.

By selecting the trajectory with the lower peak speed, acceleration, or jerk, mover transport cuts energy use, wear, thermal load, and collision risk.

Yaw-moment feedback adjusts front and rear axle torque during steering to curb understeer and oversteer and improve vehicle stability.

A recessed inverter, offset PN line, and integrated ferrite core shrink the drive unit, simplify wiring, and improve vehicle mountability.

Residual acceleration torque is reduced when accelerator input drops to zero, keeping the forklift stationary after insertion maneuvers.

A molded metal sheet and dielectric seal shield inverter housing gaps, improving EMC while simplifying assembly and removing extra EMI seals.

Regenerative brake torque is adjusted from propulsion torque use and vehicle speed to keep deceleration consistent across changing vehicle loads.

A single motor, differential, and two electromagnetic clutches coordinate rear-wheel steering and braking modes while avoiding multi-actuator failure issues.

Upper and lower control limits let multiple electric powertrains share battery power independently without supervisory control or inter-unit communication.

Front wheels are brake-held while rear-only torque is enabled, allowing intentional BEV line lock without triggering traction-control fault codes.