AC Motor Control TRIZ Cases

A power converter control apparatus adjusts voltage command values to transition between boost and non-boost states based on bus current spectrum amplitude.

Switched reluctance motor control prevents backward current flow by detecting excitation coil current to set precise regenerative mode end timing.

A brushless wound field synchronous machine integrates an induction winding on the rotor to generate excitation current without brushes.

A traction inverter controller selects between continuous and discontinuous pulse width modulation signals based on motor torque levels.

Dynamic power adjustment prevents slippage and image quality deterioration when transporting slippery media with reduced roll diameter.

A motor controller dynamically adjusts regulation time and voltage thresholds for power failure detection.

Inverter controller maintains output voltage above a target value to estimate rotational phase angle accurately.

Dynamic selection between capture and smoothing measurement types enables accurate duty cycle detection across wide frequency ranges.

Dispersed provisional fixing portions secure semiconductor chips during reflow soldering to maintain precise alignment.

A boost converter control method calculates a lower limit voltage to prevent oscillations during motor operation.

Integrated SiP merges MEMS sensors and motor driver circuitry to sample non-motor winding data, resolving high PCB footprint complexity.

Segmenting the stator into two independent sub-motors prevents torque fluctuation and vibration when one branch circuit fails.

Integrating protection and control components onto a single PCB eliminates discrete wiring complexity while reducing system footprint.

Battery monitoring unit diagnoses unchargeable states and triggers loss increase control, stabilizing vehicle travel during regeneration cooperative braking.

Segmented stator tiles with independent coil traces manage currents to create magnetic forces for precise stage movement.

Variable frequency drive controls vertical permanent magnet motor to eliminate belt slippage and gear wear in sucker-rod pumping systems.

An operation circuit calculates power levels to drive a relay switch, removing the gate driver and lowering system costs.

Programmable high pass filter and gain phase compensation modules process voltage commands to detect offset errors in the stator reference frame.

Lower elastic modulus resin at lead frame ends suppresses sealing resin peeling and cracking under thermal cycles.

A split-source inverter powertrain connects a battery and supercapacitor to individual middle point poles for compact onboard energy management.

Extended back electromotive force analysis determines rotor speed and position across all operating speeds, eliminating encoder dependency.

Optimizes lead angles using a control circuit to ensure reliable startup when inductive voltage is small.

Temperature sensors monitor servomotors in camshaft adjusters, enabling dynamic current control that prevents overheating and maintains operational reliability.

Mechanical interlocking between municipal and UPS power supplies prevents signal interference from causing incorrect rotation speed in main drive motors.

A simulated sense current tests the overcurrent detecting circuit integrity, resolving reliability issues in power semiconductor protection systems.

A command unit disconnects the AC power supply from a PWM converter when DC link voltage drops below the input peak, preventing diode breakage.

Series-connected commutation cells eliminate energy storage capacitors, reducing failure rates and freeing design space in high-power applications.

A universal power converting apparatus integrates AC and DC input paths to supply a unified heater voltage.

A protection switch circuit reroutes current pathways to shield capacitors from overvoltage during switch failures in three-level choppers.

Bidirectionally-conducting switches in the first inverter prevent regenerative current flow without extra components.

Integrates an external sense resistor into a servo IC using a current mirror and transconductance amplifiers.

Disproportionate placement of heavy components within an asymmetric case suppresses vibration amplification from driving apparatuses.

A silicon carbide semiconductor device uses a depletion suppressing layer to reduce ON-resistance.

Bundling sensor lines inside a casing reduces detection errors from reactor leakage flux while simplifying structure and lowering heat generation.

Segmented semiconductor package integrates insulated gate bipolar transistor and diode chips within a single power module structure.

Dynamic rotor flux adjustment lowers interrotor magnetic saturation, reducing copper and iron losses while maintaining torque capacity.

Segmenting battery strings into power and energy sources lets the converter balance differential loads, reducing installation space and weight.

A semiconductor device adjusts switching speed via dynamic gate resistance changes to optimize performance.

Opposing voltages from mutual inductances correct gate drive signals to resolve current sharing imbalances caused by threshold voltage variations.

A control system manages current distribution across phases using position information and objective functions to determine optimal electromagnetic forces.

An integrated current sensing circuit uses internal mirrors to measure drive current, eliminating external resistors that increase device complexity.

A frequency converter tracks network voltage phase to enable seamless bypass switching.

Rectangular wave voltages energize a salient-pole generator-motor stator with shifted conduction angles to enhance torque output.

Secondary windings generate counteracting electromagnetic forces to stabilize output thrust, reducing ripple without high switching frequency losses.

Segmenting the motor into two independent phases eliminates start dead points and reduces torque ripples in low-speed fan applications.

Generating braking torque via phase switching prevents uncontrolled rotation during over-current faults.

Global linearization adjusts switching duties based on power variation derivatives, resolving stability limits in non-minimum phase converters.

A boost converter compensates for voltage differences between dual inverters to minimize noise and ripple in electric power steering motor control.

A controller adjusts gate drive timing signals based on detected current direction to insert dead-time intervals without altering total volt-seconds delivered.

Localized trap levels in the drift layer reduce reverse recovery current and prevent self-turn-on effects in SJ-MOSFETs.