AC Motor Control TRIZ Cases

Autotransformer boosts voltage from variable frequency drive to reduce inrush current while maintaining breakaway torque.

A power converter bus bar design reduces reference potential differences across semiconductor devices by adjusting branch self-inductance.

Uniform current path widths in the wiring board resolve manufacturing efficiency trade-offs by stabilizing power supply potential distribution.

Separate film heater on the cooling jacket manages coil heat to reduce air fluctuations and improve interferometer measurement accuracy.

A semiconductor module design rearranges control signal terminals on opposite substrate sides to equalize gate wiring lengths.

A transmission-side computer generates a synchronization signal to coordinate periodic processes across multiple reception-side computers.

A PWM controller generates an output signal with a minimum duty cycle that varies according to the power supply voltage.

A motor drive circuit uses intermittent Hall biasing to reduce power consumption.

A rotary electric device control device coordinates multiple systems using shared detection values to ensure cooperative operation.

A motor control system computes rotor position and speed using hall sensor signals processed through pre-calculated lookup tables stored in a microcomputer.

A power factor corrector with full bridge circuits manages AC and DC inputs for electric vehicle charging.

A three-phase inverter shifts PWM edge timings to reduce leakage current.

Iterative field orientation detects rotor movement direction, replacing expensive absolute encoders to reduce system cost and wear.

An intelligent power module integrates a metal slug with spacers to reduce thermal resistance and increase power rating.

Stacked card power inverter transforms direct current to alternating current while managing heat generation through integrated cooling fins.

A motor control device segments the driver stage into three independent electronic circuits to synchronize safety states across the power bridge.

A single converter circuit uses MOSFETs to selectively supply energy to multiple motors.

Real-time velocity detection generates opposing braking signals in a vibro-haptic transducer, reducing settling time and enhancing haptic feedback crispness.

Series-connected inverters balance power across DC sources, reducing weight while maintaining aircraft safety.

A switching signal generator fixes gate pulses at specific phase angles to maintain stable inverter output voltage ratios.

Adjusting commutation timing via induced voltage comparison increases power output at lower intermediate circuit voltages.

A control calculation unit corrects angle detection errors using phase and amplitude signals derived from inverter connection geometry.

A motor control unit dynamically adjusts regeneration thresholds based on DC voltage rise rates to stabilize the DC link capacitor.

An inverter topology shares insulated-gate bipolar transistors and diodes across multiple phase modules to reduce component count.

Segmented power modules manage heat dissipation while maintaining compact integration, resolving thermal constraints in dense EV drive systems.

A digital PWM controller increases effective duty cycle resolution by periodically varying a comparison point based on accumulated error.

A power conversion device switches carrier frequencies to generate PWM signals that minimize audible noise in sensitive human hearing ranges.

A semiconductor integrated circuit generates PWM signals using a counter and register to synchronize pulse width measurements.

Bypass lines reroute inverter power to maintain mobility when a drive system abnormality occurs, preventing traffic obstruction.

Segmented coil units controlled by a microprocessor provide dynamic resistance, resolving the trade-off between magnetic stability and device complexity.

A driver circuit generates constant pulse energy by integrating supply voltage amplitude and comparing the result against a reference value.

Segmenting phase difference detection into integer cycle counts and sub-pulse time offsets resolves synchronization precision trade-offs.

Digital modulation merges actuation and data signals on one channel, eliminating separate physical cables to reduce mechanical error sources.

A flyback converter supplies backup power to inverter gate drivers, maintaining switch actuation and dissipating stored capacitor energy through the motor.

Backup power supplies gate drive circuits during voltage drops, enabling safe motor shutdown and preventing switching element damage.

Position sensors detect drive magnet edges to derive coarse runner location, eliminating the need for additional magnets or homing runs.

Inductance variations during excitation resolve low-speed noise and eliminate Hall-effect sensor costs.

A motor control device determines a secondary-side target voltage to switch modulation modes for electric motor drive.

Metal bumps on power semiconductor dies connect substrates while epoxy molding compound maintains precise spacing between components.

An interposition inductor arrangement balances currents across parallel power drives using opposing magnetic fluxes on a shared core.

A power module structure uses a dielectric layer between upper and lower substrates to reduce parasitic inductance.

Resiliently connected handles absorb saw blade vibrations while a water-based cooling system manages motor heat.

Integrating coexisting bus bar parts between terminals minimizes switching loss.

A BLDC motor control method skips initial rotor position alignment by using forced driving to establish a predetermined position.

A variable-frequency drive integrates bidirectional DC/DC converters to boost the DC bus voltage and recover braking energy.

Adaptive firing angle control maintains consistent braking times and reduces collector loading despite external wear or tool variations.

A single-wire fault bus enables multidirectional communication between half-bridge switching modules and a system controller.