AC Motor Control TRIZ Cases

A power control system allocates electric power to vehicle devices through gradual restriction mechanisms.

A motor control apparatus dynamically adjusts power failure detection reference voltage and protection operation timing based on elapsed time.

A pole shifting generator reverses winding polarity at high speeds to maintain stable output frequency across variable rotational ranges.

Dynamic switching between series and parallel connections in a modular multi-level converter reduces nonlinear losses and heating during power exchange.

A semiconductor device uses bus bars connected to dual heatsinks for direct electrical and thermal paths.

LCL filter merges inductive and capacitive elements to achieve -60 dB/Dec harmonic attenuation, reducing volume while suppressing low-order harmonics.

A control unit generates test pulses in stator windings to determine motor inductance and resistance using existing measuring devices.

A control device uses phase-shifted PWM and space vector comparison to identify faulty current sensors in electric motor windings.

Determines rotor position via Fourier coefficients of excitation current induced by voltage test signals, resolving measurement errors at low speeds.

Aluminum nitride layer reduces interface states at the silicon carbide gate insulator to lower on-resistance.

Replacing diesel engines with electric motors reduces equipment weight and emissions while maintaining high pressure for simultaneous well stimulation.

A two-quadrant chopper manages current flow to an energy store based on thermal load.

Control electronics compare operating parameters against stored values to detect faults in electronic switches, preventing hazards from undetected failures.

A compact electric vehicle battery charger employs a motor and inverter to perform dual functions for flexible AC power input.

A voltage amplitude linear compensation unit corrects d-axis and q-axis instructions to maintain fundamental wave amplitude.

A power supply device generates variable output voltage using pulse width modulation references derived from adjusted input commands.

A transistor-based detection circuit monitors shunt voltage to prevent motor damage from high currents, eliminating slow closed-loop response delays.

Segmenting the winch into swappable modules reduces unnecessary mass, optimizing fuel efficiency for specific missions.

A resolver offset calibration method adjusts motor parameters using algebraic power calculations to correct axis non-perpendicularity.

A battery heating system uses an inverter with parallel bridge arms to generate alternating current for internal pack heating.

Thyristor phase gating limits starting currents while mechanical bypass contacts bridge the circuit, eliminating encoder costs.

An equal duty sensing circuit detects when U, V, and W phases share a duty value, triggering a PWM signal control circuit to shift start and stop timings.

Segmented multilayer printed circuit board wiring detects overcurrent via shunt resistor to prevent overheating from short circuits.

A motor control apparatus shifts PWM pulse signals to enable efficient drive current detection using a single A/D converter for multiple armature coils.

Inductive sensing coil detects air gap length to drive magnetic levitation, replacing complex mechanical guides and reducing system cost.

A control unit modulates pulse signal frequency and duty ratio to output distinct operational states from a single communication line.

A power control device manages voltage using a step-up/down converter with independent arm switching.

Fiber optic serial channels reduce cabling bulk and latency while maintaining high-speed signal transmission.

A dual-drive actuator switches between two-way and four-way optical modes by adjusting the phase difference between its drive assemblies.

A semiconductor device reduces switching loss by pairing low-loss MOSFETs with low-conduction IGBTs in series.

Switchable stator winding connections maintain constant magnetic flux at minimum and maximum speeds, resolving electromagnetic optimization trade-offs.

A control device generates a beat signal added to sensor data for rotor position correction without normalization.

A compensation voltage determination circuit amplifies torque component current to boost command voltage for stable inverter startup.

A motor control unit manages converter step-up operations during rectangular wave drive modes.

Evaluation direction guides selective sampling to improve signal-to-noise ratio during low-speed rotor position estimation.

Dynamic field coil current control resolves the torque speed trade-off in vehicle drive motors, eliminating mechanical gear pairs.

Adjusting position conversion rates via phase angle detection resolves inaccuracies caused by varying pitch lengths in magnetic pole paths.

An open phase detection system evaluates reactor and capacitor current differences to identify power conversion faults.

A controller modifiably sets rotational frequency increase rates to match fastener types and environmental conditions.

Spread spectrum switching algorithm reduces peak noise levels in trolling motor controllers.

Current controller removes interference voltage from hall sensor signals to drive voice coil motors in camera modules.

A regenerative front-end AC to DC converter manages bi-directional power flow using electronic switching devices and grid angle control signals.

Rotating transformer transfers excitation signals to the rotor windings, enabling zero-speed position detection and eliminating mechanical shaft sensors.

Current reverse detectors monitor flow direction to optimize insulated gate bipolar transistor switching timing.

A motor driver circuit combines switched inductance boost and buck converters to recycle energy between the coil and a shared storage capacitor.

A half-bridge inverter module uses a single-wire bus to transmit encoded current pulses between control blocks.

MinMaxPWM shifts active vector positions via random offsets to reduce electromagnetic noise while lowering calculation time compared to frequency-based methods.

A multi-level medium-voltage power converter system provides isolated supply powers to generator stages.

A range switch control device monitors operation frequency to limit motor heat generation.

Switching control signals between coil units maintains equal driving currents for precise truck positioning.