AC Motor Control TRIZ Cases

A DC motor commutation method determines rotor position by analyzing the envelope of counter-induction voltage.

A switched reluctance machine uses a circulating current in phase windings to generate magnetic fields.

Acute-shaped metal electrode end portions distribute thermal stress to prevent resin cracks near electronic circuits.

Contactors reconfigure multiphase motor windings between star and mesh topologies, reducing inverter complexity during mode transitions.

A pair pole asymmetry compensation system modifies zero cross signals to improve disk drive motor control precision.

An inverter circuit produces reactive AC current to self-heat batteries, eliminating idle periods and reducing energy expenditure during preheating.

A motor-fan unit triggers acquisition devices synchronously with primary pulse width modulation signals to ensure stable electric motor control.

Independent control of segmented coil subsets reduces heat dissipation while maintaining high inductance for precise PWM current regulation.

A generator controller detects breaker failure by monitoring reverse active and reactive power thresholds alongside turbine valve closure.

A parallel inverter control method calculates an average duty cycle across multiple units to synchronize output signals.

A universal motor braking device uses control electronics to short-circuit the armature while feeding the field winding.

Bidirectional switches convert single-phase AC into two-phase output with 45-degree phase shifts, eliminating capacitor lifespan limits in motor systems.

Current-source drives with d-q transformation enable precise torque modulation while reducing power consumption in electrostatic motors.

A boost regulator stabilizes fan motor input current to suppress electrical noise coupling into communication lines.

A three-level inverter system reduces peak current ripple to maximize torque while minimizing component size.

Dynamic current allocation during inverter recovery prevents thermal imbalance and torque ripple degradation.

An inverter generates alternating current to heat a battery pack through internal resistance.

A PWM inverter control system uses lookup tables to define variable duty cycles for extended linear voltage synthesis.

A control module checks series-connected DC link capacitor voltages before charging the rectifier stage to full operating levels.

A PWM converter boosts DC link voltage using a low voltage AC source to reduce required capacitor capacitance.

A dynamic gate drive applies step-ramp voltage to an IGBT, optimizing switching speed and energy efficiency.

A motor controller safety circuit monitors logic gate outputs to determine abnormality factors and cut off PWM signals.

A motor control device varies switching frequency based on rotation speed to secure required control sampling.

Opposing current flow through stacked terminal portions suppresses surge voltage while enhancing switching speed.

Detecting DC link voltage rise adjusts reluctance motor energization timing for precise rotor position estimation.

Computes angular rotor position by sampling phase current changes during the freewheeling period of a switched reluctance machine.

Asymmetric protrusions on the power controller housing absorb collision impact before reaching the rear connector.

Controller adjusts rotor speed and stator current commands to generate auxiliary power for hybrid vehicle thermal management.

Interchanging drive signals between opposite motors preserves vibration sensation consistency when the mobile terminal rotates.

Non-volatile memory stores programmable tap patterns to enable dynamic motor speed and torque adaptation without requiring firmware reprogramming.

A unidirectional disconnecting device manages current flow between the external power supply and the vehicle DC link.

A motor drive circuit adjusts the lead angle using filtered link current to reduce power consumption.

A modular multilevel converter drive system uses high-frequency operation to reduce energy storage capacitor volume and weight.

A converter uses a film capacitor and double-layer storage to deliver high peak power from a low-power mains supply.

Cascaded stages with floating capacitor cells balance voltage across switches, preventing overvoltage damage and reducing component stress.

A motor control device sets target input voltage based on torque requirements.

Closed-loop feedback verifies bypass activation, resolving communication gaps that cause operational disruptions.

Mounting power switches on the motor end plate and placing control boards remotely eliminates long high-voltage cables.

Separating current components via parameterized fitting functions increases control bandwidth and reduces dead time in sensorless synchronous machine operation.

A comminution rotor drive uses a frequency converter to regulate traction mechanism slip and maintain continuous operation.

A motor control device adjusts PWM counts to cancel stray capacitance currents.

A series voltage-stepping capacitor buffers rapid current variations during triac switching to suppress eddy currents and audible noise in metal enclosures.

A two-stage inverter with SiC MOSFETs minimizes voltage overshoots and switching losses during high-frequency operation.

Input and output terminal blocks stack at different heights to connect thick conductor wires directly to the reactor coil.

A home appliance circuit unit transmits DC power wirelessly to a door-mounted receiver coil using electromagnetic induction.

Unit controller alters flux reference input to dissipate regenerative energy, preventing damaging feedback on the shared direct current power bus.

A motor controller adjusts voltage duty ratio based on computed circuit element temperatures to manage thermal conditions.

A power conversion bus bar integrates a supporting member within resin sealing material to secure electric components.

A power conversion device fixes the inverter PWM modulation factor to reduce specific harmonic orders in the output voltage.