Speed Controller TRIZ Cases

An electric trailer axle adds assist torque or regenerates power based on torque demand and road friction to cut fuel use and improve traction.

When target and actual current diverge, the controller switches to a reduced mapped torque target to keep the vehicle controllable without shutdown.

Brake force is shifted between steering and non-steering wheels using steering angle input to improve straight-line stability and turning response.

Dynamic torque redistribution between dual power drive systems suppresses resonance, cutting EV vibration and electromagnetic noise without added hardware.

A common housing combines generator, motor, and reduction gears to shrink vehicle drive packaging while preserving controllable electric output.

Droop-based inverter control balances torque across parallel generators during speed changes and faults to prevent overload and maintain stability.

Side-by-side motor and power converter placement shortens electrical and coolant routing to shrink the vehicle drive unit without losing cooling.

Planned travel and battery charge are checked before use, blocking motor drive when charging is needed to prevent cart power shortages.

Fault-priority coupling control coordinates electric machine engagement with wheel torque requests to prevent damage and reduce energy waste.

A closed-loop torque model recalculates wheel-rail friction from speed error, improving rail vehicle driving and braking control.

Peak detection and target-load control cut high-voltage battery output spikes, protecting vehicle loads during sudden power demand changes.

A high-frequency DC-DC converter varies EV DC-link voltage to cut switching losses, improve low-speed efficiency, and decouple inverter and motor sizing.

Calculated wheel stiffness replaces feedback-gain calibration to improve yaw-based driving force distribution, cornering stability, and slip control.

By switching stator pole count from driver input and travel state, this EV drive motor creates stepwise torque and speed changes like gear shifts.

Mode switching between synchronous and asynchronous motor drive extends EV output range while antiphase current suppresses torque pulsation.

Parallel power converters replace dedicated filtering units to cut EV system weight and enable scalable drive and auxiliary power distribution.

Auxiliary-driven omni wheels help a robotic lawn mower turn with less friction and moment, reducing lawn wear and grass damage.

A constant reference torque based on wheel speed and estimated adhesion cuts oscillations, limits resonance, and improves rail traction.

A rotor combining permanent magnets and secondary conductors switches between synchronous and asynchronous drive to widen output and reduce vibration.

Variable release timing and main motor load relief help unlock a parking gear reliably across tilt, weight, and actuator temperature changes.

Artificial engine sound and torque emulation makes EVs more audible to pedestrians while preserving electric drive behavior and efficiency.

An electrical control unit shifts power between isolated fuel cell modules to balance battery charge, meet torque demand, and avoid inefficient switching.

Server-managed charging permission enables vehicles to receive wireless power while moving, cutting charging delays and preserving traffic flow.

A controller compares pulsed and continuous torque efficiency, including battery losses, to switch motor modes only when net system efficiency improves.

Real-time power-based torque correction updates motor maps without a torque sensor, improving hybrid powertrain control and battery protection.

While one motor charges the battery, d-axis current warms the other motor to limit temperature difference and preserve traction torque balance.

Longitudinal force sensing lets an electric trailer adjust wheel torque, assist braking, and preserve EV towing range.

When pedal input is off, a disturbance observer and feedback control hold downhill EV speed with regenerative braking, reducing driver intervention.

Battery-buffered fuel cell control keeps output near peak efficiency, cutting hydrogen use and extending EV range without larger tanks.

A local stator fault scope puts only affected drive coils into a fault state, keeping other transport units running safely.

A defined accelerator pedal range de-energizes the traction motor coil to hold zero torque, cut electrical losses, and extend coasting.

A dual-brake planetary CVT adjusts gear ratio to keep an EV motor in efficient torque-speed regions while preserving driving performance.

Inductive coupling from a rail motor cable powers onboard sensors continuously, avoiding battery replacement and supporting wireless data transfer.

A two-stage protection circuit redirects back-EMF surge current to the battery, limits DC bus voltage, and protects EV power switches.

PWM duty feedback cancels common-mode voltage and current in open-end winding motor drives, cutting losses while preserving torque.

A synchronizer links dual motors and a planetary gear set to improve EV torque vectoring, motor operating points, and wheel torque delivery.

Switchable series-parallel battery packs and half-bridge buck converters let an EV drive match voltage to speed and torque with lower losses.

Independent wheel motors and torque vectoring let an overrunable platform carry soft targets and simulate realistic ADAS crash scenarios.

Calculates an upper travel speed from route profile and initial SoC so an EV can reach its destination without mid-route charging.

Variable-frequency pulsed torque commands help rotating electrical machines reach target speed with lower energy loss at specific torque levels.

Parallel coolant channels and a serpentine capacitor path cut thermal resistance in EV inverter power modules without grease or spring clamping.

A hybrid onboard and external power supply extends electric vehicle mileage while reducing emissions without enlarging battery capacity.

Current and voltage sensing replaces torque feedback to keep range extender output aligned with demand and protect the battery in cold starts.

A shared wheel-sensor layout feeds both brake ECUs, preserving all-wheel data during faults while reducing duplicate sensors and cabling.

Using rolling resistance, power loss, and acceleration, this case improves low-speed assist smoothness by avoiding mass-based control errors.

Real-time gear tooth pressure drives virtual sound and vibration in EVs to recreate ICE-like shift feel and driving emotion.

Housing the power converter inside the motor and integrating the reducer cuts wiring complexity and enables a more compact electric drive layout.

Counteracting q-axis current cancels d-axis heating torque, warming cold windings without sudden rotor motion that harms ride comfort.

Combining parking brake force with motor negative torque until a speed threshold cuts motor size, brake wear, and service brake needs.