Speed Controller TRIZ Cases

Slip detection from wheel and vehicle speed or acceleration differences enables torque limiting and reallocation on low-traction roads.

Centralizing motor control, DCDC, and power distribution cuts EV high-voltage parts, saves space, and prevents battery depletion.

Opposite front and rear wheel-end torque adjustments smooth HEV mode and gear shifts, preventing torque interruption and power loss.

Dynamic EV velocity profiles balance travel time, battery power demand, and heat stress by adapting to road conditions and energy storage state.

A chambered housing packs the motor, control module, and transmission into one unit to save vehicle space while keeping electrical connection.

Gradient torque shaping, zero-crossing anti-jerk torque, and wheel-speed compensation reduce jerking across changing drive conditions.

An axial plate layout nests the park lock beside the gear mechanism to shrink EV power transmission packaging without functional interference.

Independent upper and lower gate drive power paths keep three-phase active short circuit available after a single power source failure.

Phase windings double as filter inductors to charge batteries with less torque, lower weight, and no external inductors.

Precomputed edge timing lets a 2-stage inverter maintain stable five-edge PWM through sector transitions, improving voltage vector accuracy and reducing losses.

Brake-limited opposing motor currents set rotor angle limits for static battery heating without unintended torque, jerking, or knocking.

Real-time quadrature current feedback synchronizes eccentric shafts to control phase angle, cutting compaction noise and vibration.

Motor speed and DC bus voltage guide ASC, HASC, or freewheel switching to prevent inverter degradation and extend traction component life.

Switching axial-flow motor windings between star and delta states cuts thermal stress at high speed while sustaining efficiency and power output.

Switch-voltage monitoring isolates a faulty converter leg and derates output so parallel battery packs can keep powering vehicle loads.

Movable beam or motor engagement with absorbers keeps magnetic propulsion close in curved ride sections while reducing interference and wear.

Coil-driven magnetic fields change pouch stiffness to shift resonance frequency, reducing vehicle NVH without heavy passive barriers.

An inverter superimposes AC on battery DC during driving, creating ohmic heating while keeping motor torque at zero.

Rear-wheel torque bias and speed differentiation let an AWD EV perform controlled donuts after battery, steering, and surface checks.

An outer rotor with two independent inner rotors enables compact EV wheel torque and speed control without a traditional differential.

A joystick input is split into target speed and angular velocity so a small EV can turn intuitively while maintaining intended travel speed.

Acceleration-based control switches a work machine between motor assist and power generation to preserve battery capacity and avoid wasted torque.

An emergency stop on the low-voltage line triggers high-voltage shutdown and relay disconnect to prevent leakage and runaway output.

When shared low-temperature coolant runs hot, the control unit shuts down the electric oil pump drive circuit to prevent current overload and damage.

Software-controlled gates and actuators let an EV shifter emulate manual or automatic gear feel, including gear grind and clutch sensations.

A coordinated MPC strategy links active front steering and direct yaw moment control to optimize in-wheel motor torque and lateral stability.

Sensor feedback shifts the vehicle coupling point along the interface device to keep stable catenary contact and avoid manual adjustment.

Combining permanent-magnet and asynchronous or reluctance motors with SiC and Si inverters cuts rail drive losses during partial-load and rolling phases.

A multi-bus transformer isolates shore power while transferring AC between watercraft buses, cutting converter count, losses, and complexity.

A motorized chair and overhead frame let operators work at ground level without bending or kneeling, improving comfort, stability, and control.

A posture-aware controller steers a pivot-connected trailing mobility unit during backward driving while removable batteries extend range.

A dual-path EV power network uses switch isolation of abnormal supply paths to maintain load operation without full redundant hardware.

Automatic EV-mode startup avoids driver confusion, while shifter-linked MT mode preserves manual-style motor response in a battery electric vehicle.

Adjusting motor current phase instead of current magnitude helps eVTOL propulsion maintain torque during abnormal states with lower energy waste.

Continuous DC power calculation checks rotor position and speed estimates in synchronous machines and shuts down PWM before inverter faults propagate.

By placing the inverter beside the motor along the shaft axis, this EV drive unit cuts package size and simplifies wiring and coolant paths.

Selective high-frequency injection and flux observation keep a riding mower motor running under heavy load by stabilizing rotor position detection.

A master controller pairs induction and permanent magnet motors with high-power and high-energy batteries to improve regen and battery life.

Closed-loop yaw correction offsets wheel slip and ground surface differences to keep differential-drive vehicles stable in straight travel and turns.

Torque commands are corrected from vehicle and motor state data to balance in-wheel motor load, temperature, and reliability.

Multi-parameter bearing monitoring combines temperature, sensor integrity, and graded speed limits to protect traction motors in trains.

Oscillating motor torque recreates engine-like vibration in EVs while adapting commands to avoid drive-system backlash and impact.

Target wheel speeds are kept within allowable slip ranges to preserve turning and acceleration while suppressing drive wheel slippage.

SOC-based operating areas let an EV controller switch power supply and charging between two batteries to balance usage and protect durability.

A flight control system detects each propeller's proximity to vortex ring state and limits descent to preserve thrust and stability.

Vertical wheel displacement and friction estimates set per-wheel traction limits, allowing torque redistribution to prevent slip on uneven ground.

Redundant failure detection and feedback stop motor torque quickly when power transmission faults occur, helping prevent vehicle damage.

Battery-aware speed control lowers turning speed and acceleration to suppress trajectory deviation in autonomous travelling robots.

Brake hold assist lets an EV simulate engine stall by cutting motor torque while preventing uphill roll-back and preserving driving feel.

Equivalent front and rear axle speed difference guides drive shaft torque adjustment to curb wheel slip and cut power waste.

Torque slope limiting across front and rear motors reduces backlash strikes, vibration, and NVH during EV mode transitions.

A resonant RLC balancing circuit preloads and equalizes flying capacitors to prevent overvoltage and protect transistors.

Operational data is used to classify riding conditions and switch drive control strategies for safer, smoother electric mobile device operation.

A heating wire on the power control unit housing offsets cold wind temperature gaps to prevent internal condensation and insulation damage.

Battery state of charge drives real-time traction and hydraulic power limits in a telehandler to improve productivity and ease of use.

A non-conductive hybrid power control housing uses grounding busbars and a grounding port to cut weight while maintaining grounding and noise shielding.

Independent brake and accelerator monitoring lets the battery management system cut drive power when ECU failure blocks normal EV deceleration.

A hybrid IGBT-MOSFET motor control unit cuts light-load losses by switching circuits while retaining high current capability at heavier loads.

Longitudinal-speed-based limits let each tractor or trailer unit use tailored control settings to improve stability and reduce roll-over and jack-knifing.

A removable E-PTO housing combines motor, inverter, battery, and pump to cut refuse vehicle hydraulic servicing downtime.

Dual electrohydraulic brake circuits and wheel-specific pressure control maintain yaw stability and braking performance during EV steering or brake faults.

Front-rear force sensing lets add-on mobility coordinate drive and braking with the main vehicle to improve energy recovery and fuel efficiency.

By calibrating actual tire size from wheel rotational velocity, this case prevents motor fighting and improves traction control stability.

AC and DC switchable half-bridges let an electric machine charge onboard storage externally while avoiding separate charging hardware.

Wheel-level speed and torque inputs let the controller distribute battery power more accurately across in-wheel motors for efficient traction and braking.

Stacked cooling cavities and separated inlet-outlet channels improve EV powertrain heat removal while reducing package size and easing mounting.

Real-time yaw-rate feedback shifts front and rear axle recovery torque to maintain vehicle stability while improving regenerative braking efficiency.

Route topography is used to reserve only the ESS energy needed for endurance braking, preventing service brake overheating without unduly cutting range.

Dynamic axle power allocation uses road grade and load data to cut energy use while maintaining traction, slip safety, and torque margins.

During gear shifts, the controller switches from slip torque response to transfer torque limiting to prevent input speed rise and keep wheel force stable.

Built-in redundancy circuits replace failed SiC MOSFETs in real time, extending inverter module life and reducing replacement cost.

Positional control disables or decouples an electric wheel axle in restricted zones or towing conditions to prevent damage and cut emissions.

Calculating a return-energy threshold lets off-highway machines work longer, then alert and limit operation before battery or fuel-cell depletion.

Automatic marine drive demand reduction matches remaining energy to route needs, helping a vessel reach its destination without depletion.

Front EMB braking is paired with rear motor regenerative and plugging braking to cut EMB hardware cost while maintaining stop stability.

Brake operation and release signals are used to confirm rider start intent, preventing unintended electric mobility activation.

Reference control inputs account for actuator capability so multi-unit vehicle propulsion and braking avoid counteracting forces and wasted energy.

Individually ramping regenerative braking torque in two motors keeps total braking torque constant during EV direction changes and gear shifts.

A removable restriction member blocks accidental harness connector release from branches or vibration while preserving maintenance access.

Individual motor regenerative braking keeps total braking torque constant during EV direction changes, avoiding standstill and brake wear.

Gradient- and temperature-based torque limiting protects EV motors from overheating while preserving uphill acceleration and drivability.

Dual friction estimates set lower and upper limits for front and rear wheel force distribution, reducing rear slip or locking during acceleration and braking.

Clock-signal square-wave control heats motor rotor and stator without harmonic superposition, cutting power electronics complexity and computing load.

Star-point ancillary terminals bypass semiconductor switches in a modular multilevel converter, cutting impedance and switch losses for low-voltage supply.

Short-range sensors are deactivated when stopping distance exceeds detection range, cutting EV power use and freeing compute for critical sensing.

Gate duty cycle polarity changes prevent PWM line-to-line voltage reversal, reducing insulation stress with minimal distortion.

Road-slope and deceleration-zone recognition sets regenerative braking torque to improve energy recovery, fuel efficiency, and ride comfort.

Parallel HCP and auxiliary HCP wakeup cuts EV propulsion start-up below two seconds while preserving CAN-based safety checks.

A master-slave control allocator splits combination-level and unit-level tasks, adapting to trailer or actuator changes without controller rework.

A feed forward controller pre-activates the load system during deceleration to limit charging current, avoid overheating, and keep direction changes smooth.

Selecting mover trajectories with lower peak speed, acceleration, or jerk cuts energy use, wear, thermal load, and collision risk.

Independent battery modules and bi-directional DC-DC control extend EV range while balancing cell states and protecting cycle life.

A two-stage start sequence adds neutral confirmation plus visual and audio cues so operators know when the marine motor is ready without accidental drive.

Pre-motor torque and staged boost control cut EV launch response time and shorten the path to maximum acceleration from standstill.

Controlled inverter switching discharges the DC link during freewheel or active short circuit while preventing erratic motor torque changes.

Counteracting motor torque keeps the input shaft still during clutch learning, improving engagement start pressure accuracy in hybrid drives.

When the electric machine is decoupled from the drivetrain, generator braking recovers rotor energy that would otherwise be lost and improves vehicle efficiency.

Variable lever resistance and segmented operating ranges improve electric motorcycle drive and regenerative brake control while reducing misoperation.

One half bridge is toggled while the others remain open to discharge an EV DC-link capacitor within seconds and limit transistor stress.

Joystick input is translated into speed-adaptive left and right motor targets, making slow-speed turning more intuitive and stable.