Electric Motor Control TRIZ Cases

Filtered rotor position estimation removes fundamental-frequency error components, cutting torque and power pulsations in sensorless rotating machine control.

Inductive position sensing lets a lock controller reverse on blockage, then apply boost current to reach the target state with less excess draw.

A battery and supercapacitor power path lets motorized shades handle motor surges while keeping battery current at a lower average level.

Separate filtered voltage sensing for each inverter offsets wire impedance differences, reducing noise-driven overvoltage detection errors.

Continuous voltage pulses derive phase inductance to detect BLDC rotor position accurately at zero and ultra-low speed without sensors.

Switches between magnetic flux and q-axis energy maps to estimate rotor magnet temperature accurately without added sensors or cost.

Piezo elements in the motor force flow enable automated inverter calibration from force and torque data, cutting torque ripple and energy loss.

Temperature-based voltage thresholds let the inverter detect DC disconnection quickly while avoiding false shutdowns and overvoltage damage.

Electromagnetic emission comparison reveals converter faults and remaining life without extra sensors, supporting reliable propulsion maintenance.

Dual controllers synchronize PWM timing across abc and xyz phases so a 6-phase motor can keep operating if one controller fails.

Precomputed angle-based lookup tables reconstruct missing BLDC phase currents for FOC while cutting processing time and external sensing parts.

Electronic pole reconfiguration lets an electric motor adjust speed and torque in real time while improving efficiency across varying loads.

Braking energy from one machine tool drive is split between a shared battery and resistor, then reused across other drives to cut waste and cost.

Sequential current-path switching detects winding shorts before startup and separates phase winding faults from inverter failures.

A multiplexer and comparator-based scaling path improves DC link voltage resolution while detecting overvoltage and undervoltage faults.

Dynamic amplifier gain boosts motor winding current sensing accuracy across wide load ranges without requiring higher ADC resolution.

Independent balancing currents in winding segments retrofit flux control to cut vibration, noise, and THD without rebuilding the machine.

By extending on-time only when low duty cycles miss sampling timing, this case improves direct current measurement without upsetting voltage control.

Continuous rotor flux monitoring triggers d-axis pulse remagnetization when flux drops, limiting demagnetization in lower-cost electric motors.

When cold oil raises drag and vibration, the power control unit is driven to generate heat and warm the oil through a water-oil exchanger.

Complementary PWM across opposite-phase machine windings cancels common-mode emissions, cutting shaft voltage, bearing currents, and EMI filter weight.

Processed wind turbine detection data is turned into abnormality alerts that trigger maintenance and parts delivery with less downtime.

Multiple swing, vibration, and oscillation modes help an electric toothbrush clean missed tooth areas more completely.

By estimating phase resistance at standstill during start-up, the controller cuts FOC computation while preserving efficient, low-noise motor speed control.

Gradual inverter current control heats a parked vehicle battery through motor windings while keeping torque below the brake holding limit.

Predictive switching from SMO to high-frequency injection maintains rotor position detection during stall and reduces torque ripple.

A secondary motor tracks standby rotation to cool dynamic brake resistors and prevent heat-driven reliability loss.

Series-connected AC-to-AC converter modules cut traction voltage stress, enabling lighter, smaller, and more fault-tolerant motor drives.

Excess regenerative current is diverted through a resistor while torque or speed is limited by current and resistor heat to avoid breakdown without longer deceleration.

A step-up converter keeps battery voltage above IC thresholds during high loads, preventing cordless tool shutdowns and component damage.

An out-of-phase counterweight, linkage, leaf spring, and foam bumper cut axial vibration transmission in a percussion tool and reduce operator fatigue.

A voltage-follower and gain-amplifier test sequence verifies redundant generator overvoltage trips without multiple regulation voltages.

Back-EMF phase voltage sensing lets an eVTOL motor controller detect rotor position and quickly resynchronize inverter commutation after shutdown.

Independently actuated bipod legs stabilize and steer long utility poles in wind, reducing worker strain and improving positioning precision.

A control gain estimator aligns motion and servo parameters across separate unit systems, reducing manual tuning and improving motor response.

Low-pass filtering and averaged current sampling improve motor inverter RMS current detection without relying on a high-speed ADC.

Separate harmonic current control for each winding set cuts torque ripple from stator and rotor deviations while limiting noise and vibration.

Redundant primary and backup actuator channels verify commands and average duty cycles to resist common-mode failures with less hardware.

Deceleration torque based on rotor speed and acceleration damps DC-excitation oscillation and shortens magnetic pole position detection.

An operation mode determination circuit checks tentative and communicated settings with error detection to prevent load control malfunctions.

A predicted current-vector trajectory guides electric machine short-circuiting to reach a safe state fast while limiting transient current and voltage.

Hall sensors read axial leakage flux from rotor magnets to track shaft angle without sense magnets, cutting motor length, weight, and cost.

Sequential current-path switching helps distinguish phase winding shorts from switching circuit faults, cutting misdiagnosis and repair time.

Isolation switches and diode freewheeling paths manage OSSC faults, cutting drag torque and sustaining useful inverter output.

Variable dead-time control in a current-compensated power converter cuts harmonic current and helps meet IEC61000-3-2 limits.

Separate fault detection on primary and secondary circuits plus a self-test path improve isolated drive-signal reliability in vehicles.

Separate pre-drivers for main and backup EPS control units prevent shared-driver faults and keep motor control stable during failures.

Independent current-limit calculation lets steer-by-wire controllers maintain torque and turning accuracy when temperature sensors disagree.

A semiconductor switch and Zener decay path interrupt exciter current quickly, enabling fast rotor demagnetization during emergency shutdown.

N-division rotor region search and a stator-current cost model speed sensorless permanent magnet motor position estimation with less computation.

A frequency determining processor sets a variable switching range for inverter pulse width modulation signals.

A signal detecting device uses a single A/D converter to detect current and state parameters via periodic switching.

Periodic pulse charging of a smoothing capacitor reduces standby current draw in electric motor controllers.

Relocating machine protection relays and filter capacitors to remote switch cabinets extends component service life in high-temperature environments.

An inverter monitors motor phase currents and voltages to detect electrical malfunctions.

A motor drive device synchronizes rotor position and drive waveform phases using pre-calculated lookup tables to minimize response delay.

A protective circuit detects thermal overload using resistance ranges and short-circuit identification for electric motors.

An electric motor emits controlled sound waves without rotor rotation to serve as an integrated acoustic transmitter.

A cross-linked series configuration of rectifiers and inverters cancels harmful subharmonics that single inductors cannot remove, preventing torsional damage.

Interconnects conduction paths to convert negative sequence flux into positive sequence flux.

A rechargeable electric tool detects motor-lock conditions by comparing real-time battery voltage against a stored reference value.

A braking apparatus detects actuated and released states by monitoring voltage variation patterns across the brake coil terminals.

A control device measures generator output current by detecting the voltage drop across an internal process-controlled conductor.

Bidirectional communication enables fault detection by comparing monitored parameters against limit values to ensure safe motor operation.

A rotary machine control apparatus adjusts switching frequency based on rotational velocity to manage drive signals.

Detecting turn-off times and adjusting firing angles to compensate for DC components, ensuring smooth torque during asynchronous motor start-up.

A fault tolerant inverter uses a spare leg and control subsystem to take over operation when switch devices fail.

A motor actuator detects short circuits between redundant stators using dual inverter control signals.

A motor switch toggles brake coils to control rotor rotation and prevent forceful sliding door movement.

A temperature sensor in the actuator controller measures heat through conductive materials to compensate for control inaccuracies.

Winding taps divide phase impedance for direct electromotive force detection, eliminating expensive position sensors that compromise system reliability.

A vehicle door control device applies voltage to a motor to assist opening and closing operations.

An electric compressor adjusts motor carrier frequency based on temperature to reduce load and prevent component overheating.

A motor control device computes acceleration parameters based on electrical storage capacity to stabilize servo operation.

A DC motor control system calculates temperature using shunt resistance voltage to prevent torque deterioration.

A power converter controller calculates average losses to estimate partial temperature variations using thermal resistance and time constants.

Segmented space vector modulation reduces motor end overvoltage by eliminating simultaneous bridge arm switching, avoiding dv/dt filter volume and cost.

Detecting rotor magnetic pole position via high frequency voltage application and current magnitude analysis eliminates physical sensors.

Polar coordinate transformation eliminates complex Clarke and Park calculations, reducing implementation effort while maintaining precise torque regulation.

A control device adjusts the current detection sequence based on pulse width modulation duty cycles to ensure accurate measurements across multiple motor phases.

A DC motor control circuit uses a pre-charged capacitor and switch to momentarily double voltage.

An isolated transformer induces current in a loop to rectify and charge energy storage devices, eliminating startup delays and torque surges.

A control signal board manages multi-phase induction motor operation by transmitting and receiving specific speed signals to activate power contactors.

A power module uses a rigid metallic frame body with a high-conductivity heat radiation member to manage thermal loads.

Dual magnetic sensors detect magnet rotor rotation restriction via binary signal comparison, eliminating complex flag-based control processes.

Power conversion device stores magnetic pole position estimation data in memory to eliminate repeated detection and reduce restart tact time.

A brushless DC motor weight loading system uses a rally rope to transmit electromagnetic force directly to fitness equipment.

A control circuit sets target rotational frequencies for attached tools to optimize motor operation.

Sequence component transformation detects inter-turn faults without extra current transformers, reducing device complexity while maintaining high reliability.

A machine learning apparatus adjusts cooling device operation rates using temperature data and loss margins to optimize thermal management.

Microcomputer samples half-bridge driver voltages to detect overcurrent, eliminating differential amplifiers and reducing circuit complexity.