AC Motor Control TRIZ Cases

A charging switch and DC-offset phase currents let an auxiliary battery charge the main battery while driving, extending range with low power loss.

Multiple position feedback devices send real-time signals to the controller, cutting delay and improving direct drive control efficiency.

Thermal and current feedback adjusts gate pulse width to discharge inverter bulk capacitors quickly while limiting SiC MOSFET stress.

A relief feature and adjacent sensor track anvil position so the controller can time impacts more precisely and reduce uncontrolled strikes.

By using lower-tube voltage drop and switch-on resistance, this case reconstructs three-phase motor current in the dead zone without PWM phase shift.

By matching PWM switching frequency to machine tool and energy storage characteristics, this case avoids motor resonance and vibration damage.

Alternating high- and low-doped collector regions with a hole discharge structure reduce hole current concentration and turn-off loss.

Cooperative control between adjacent planar drive subsystems distributes computation, enabling precise rotor transfer across stator surfaces.

A rectifier and logic circuit vary impedance by motor rotation direction, creating stronger rebound than compression damping for better vehicle stability.

Magnetorheological fluid switches a rear steering converter between efficient drive and fail-safe self-locking without extra sensors or controllers.

Dynamic topology switching lets a six-phase flight actuator motor keep operating under faults while reducing switching losses and torque ripple.

Gapped motor modules and a longer rotor maintain linear transport drive coverage while cutting module count and enabling precise magnetic positioning.

Real-time magnetization control lets VFMMs switch torque and speed modes from user or sensor inputs while maintaining efficiency and power output.

A sealed enclosure with a boost regulator and ultracapacitor survives steam sterilization, enabling reusable surgical power electronics with less waste.

Multiple selectively connected braking resistors stop a power tool motor quickly while lowering heat concentration, cost, and PCB space.

A second VFD captures elevator regenerative power from the main drive and routes it to storage, dissipation, or the grid without load banks.

A sealed case, side insulating layer, and filled package region block moisture ingress while preserving insulation and heat dissipation.

A backup steering power strategy keeps motor output limited until main-source recovery and source switching are fully completed.

An R-shaped recess in substrate wiring absorbs thickness variation, preventing resin leakage and substrate damage during transfer molding.

IGBT-based main and pre-charge relays replace mechanical contacts and resistors to cut relay unit size, weight, noise, and power loss.

Placing the battery on the turning frame below the motor lowers excavator center of gravity, improving balance and compactness.

Adaptive d-axis current control raises motor heat for battery heating while limiting torque fluctuation, vibration, and noise at low speed.

Nearly constant current steps let an LRA driver track resonance from Back-EMF phase during haptic events, cutting audible noise and drift.

Passive heat-pipe cooling replaces electro-mechanical pumps in power converters, cutting weight and volume while maintaining high power density.

Offset correction is updated only within valid PWM duty limits, improving motor current sensing and reducing steering torque ripple.

Switching between high and low DC bus voltage lets one actuator motor meet torque and speed demands without torque ripple or extra motors.

Variable resistive and current gate driving cuts EV inverter switching losses while improving EMI tolerance and fault detection speed.

A radial arm-circuit layout around the input terminal levels current flow, cutting inductance and improving power conversion efficiency.

Integrating the bootstrap diode and resistive element on one semiconductor chip cuts installation area while preserving control-chip power supply.

Two measured motor phases are oversampled and averaged to reconstruct the third voltage for plausibility checks without extra hardware.

Conditional inverter switching only where a transferring body is present cuts transfer-path noise and energy loss while keeping motion readiness.

Shifted PWM activation pulses satisfy minimum pulse width limits while extending duty cycle range and smoothing transitions in power converters.

Operational-state-based correction removes induced voltage error in inverter current sensing, improving motor control without larger circuits.

Dynamic switching between six-phase and split commutation modes improves VTOL actuator redundancy, efficiency, and wiring weight.

By slowing the load before PWM cutoff and stopping at low link voltage, this case protects small DC link capacitors from regenerative overvoltage.

A substrate trench enables thinner sinter layers in EV inverter power modules, improving heat flow, lowering assembly cost, and preserving voltage isolation.

A point-of-use gate driver inside the power module cuts EMI, improves gate sensing, and speeds fault response in EV inverters.

Controllers detect gate open faults in SiC phase switches by timing gate charge and compensating for temperature to prevent inverter failures.

Local high-voltage decoupling capacitors inside EV inverter power modules cut stray inductance, ringing, switching losses, and EMI.

Embedded point-of-use control detects SiC gate leakage inside EV inverter power modules despite PWM distortion and strong electromagnetic fields.

Spatially separated stator windings enable interleaved PWM in EV motors while reducing circulating current, harmonics, torque ripple, and NVH.

A two-winding induction generator splits propulsion and accessory power, cutting converter capacity, brush use, and dump truck drive cost.

During one-shunt current blind periods, the controller pauses integral action and uses proportional control to keep motor speed control stable.

One movable unit maps floor positions and linear motor air gaps, then guides other elevator cars to improve ride comfort and cut setup time.

Motor speed is adjusted through a VSD to stabilize PV voltage at the global maximum power point without adding a DC/DC converter.

A conductive rotor cage lets one VFD run multiple synchronous reluctance motors in open-loop V/Hz mode, cutting sensor and controller complexity.

Emergency switching balances spatial vector output times to suppress neutral-point variation and keep three-phase AC running after short circuits.

Differentiated current waveforms for two radial winding systems suppress torque ripple, vibration, and noise in toothless slotless machines.

Adjustable gate slew rates synchronize hybrid semiconductor switching in multi-phase inverters to limit overcurrent, overvoltage, and EMI.

Variable gate resistance and timing control synchronize hybrid inverter switches to curb overvoltage spikes, EMI, and power loss.