AC Motor Control TRIZ Cases

Intermittent source-electrode recesses break up Ni/Au front metal stress and corrosion paths, helping SiC trench devices resist cracking.

Keeps a DC-AC inverter active during main-load downtime, redirecting power to auxiliary loads to maintain capacitor voltage balance.

Rotor-position feedback and d-q current control let an electrostatic motor drive improve torque and speed precision while reducing wasted power.

Separated sensor housings isolate converter heat from machine-current sensing, preserving precision and reducing crosstalk.

A resonant motor drives a larger LiDAR scanning mirror at high frequency and amplitude, expanding field of view with lower power use.

Passing a preset current through the inverter creates heat that the cooling circuit uses to warm a high-voltage battery with simpler control.

Dynamic switching between SVM and GDPWM cuts inverter losses while limiting DC link ripple and capacitor size across operating points.

A line contactor bypasses the inverter at high speed, cutting EMI and component size while keeping efficient low-speed motor control.

Back-EMF flux-change estimation guides when a PMSM can switch from start-up control to closed-loop synchronous operation without rotor sensors.

A switchable series-parallel converter lets the rectifier act as a standby inverter, sharing load power and maintaining operation if the main inverter fails.

A two-phase capacitor sensing circuit turns negative low-side reverse-current voltage into a usable detection signal for accurate buck converter monitoring.

Transient waveform generation adapts vibration parameters to each linear motor's resonant frequency for consistent haptic output.

Distinct magnetic vector fields let linear transport carriages be identified anywhere on the rail using existing position sensors, cutting identification time.

A booster circuit and capacitor keep steering sensors and pre-drivers powered through battery voltage dips, avoiding EPS interruptions.

Zero-vector current clamping limits transient overcurrent in three-phase converters while reducing motor vibration, ripple, and DC-side recharging.

Adaptive stop reaction torque uses vehicle stop state and remaining battery power to hold steering feel while limiting discharge.

Reconfigured motor stator windings boost charger voltage and isolate winding sections, enabling battery charging without a separate DC-DC converter.

Dynamic underspeed thresholds and timed motor cutoff reduce nuisance shutdowns while maintaining target speed under high torque.

PWM-driven electromagnets in a linear motor are modulated to transmit data, avoiding separate wireless hardware between stator and carriage.

An isolated bidirectional DC/DC converter stacks variable voltage on DC power to cut switching and steady losses in moving-body power supply circuits.

A single-carrier sensor-less PWM scheme stabilizes 3-level flying capacitor switching, cutting voltage ripple and EMI from carrier drift.

Neutral terminal voltage clamping cuts transfer switch losses while dual inverter motor modes balance EV torque demand and fuel efficiency.

Measured drain-source transition time lets the controller retune gate-drive current, cutting switching loss and noise despite capacitance and temperature shifts.

A shared-switch MDSVM circuit controls current strength and direction in multiple coils while reducing switch count and control complexity.

Preset inverter current creates Joule heat that the cooling circuit transfers to the vehicle battery, simplifying warmup control without a step-up converter.

Rotor-angle-based bridge-arm control lets the drive motor boost charging voltage while reducing torque and losses without added boost hardware.

High-frequency injection into two non-energized SRM phases enables sensorless rotor angle estimation with better EMI resistance in harsh environments.

Angled Hall sensors on one PCB keep rotor position sensing active after sensor failure while improving signal resolution in motors.

A porous frame around the insulating resin layer absorbs resin during compression, suppressing voids while maintaining insulation and heat dissipation.

Encrypted controller-motor authentication keeps phase lines disconnected until trust is verified, blocking counterfeit parts and unauthorized operation.

Multiple HFAC zones with CLCL resonant inverters shorten AC paths in EVs, cutting skin-effect losses and reactive power.