AC Motor Control TRIZ Cases
- Motor Control Device Dither Control for EPS Steering
A motor control device applies dither control to current command values during n-1 phase energization.
- Dynamic Fan Control via CPU Current Monitoring
A fan control system adjusts rotation speed using temperature and current detection modules.
- Switched Reluctance Motor Control Device for High-Speed Drive
A motor control device synchronizes PWM carrier timing with rectangular wave signals to switch drive modes based on rotational speed.
- Five-Phase Machine Torque Control via Harmonic Optimization
A five-phase rotating electrical machine control system determines specific first and third harmonic current setpoints to maximize electromagnetic torque output.
- Inverter Control Device Minimizing Output Power Fluctuations
A control device selects operation patterns with minimal change to stabilize inverter output power.
- IPMSM Flux Weakening Control Using Dynamic Current Correction
Dynamic current command correction eliminates pre-measured look-up tables, maximizing voltage utilization and maintaining output torque at high speeds.
- Switched Reluctance Motor Current-Mode Drive Energy Recycling
Current-mode drive circuitry recycles stator coil inductance energy to eliminate mechanical gearboxes and maintain efficiency across variable output levels.
- Motor Drive Circuit Reverse Current Inhibition
A motor drive circuit detects reverse current flow between transistors to manage synchronous rectification timing.
- Variable Speed Drive Ride-Through via DC Link Voltage Control
Transfer control from active rectifier to inverter reverses motor power flow, sustaining DC link voltage without extra hardware.
- Semiconductor Die Pad Curved Corners for Stress Dispersion
Curved die pad corners disperse stress to prevent delamination during temperature changes and improve adhesion between the die pad and resin.
- Semiconductor Module Inner Conductive Layer External Bonding
A semiconductor module uses a stacked substrate inner conductive layer protruding outside the encapsulant for external bonding.
- Wound Rotor Synchronous Motor Thermal Control via Mode Switching
A drive motor controller switches a wound rotor synchronous motor between WRSM and SynRM modes to manage stator and rotor currents.
- Sinusoidal Modulation Control for PMSM Using U-Shaped Waves
A sinusoidal modulation control method generates a full-wave U-shaped wave from rotor position signals to produce PWM control.
- DC Bus Clamp Circuit for ASD Overvoltage Protection
A DC bus clamp circuit uses diode-switched damping elements to absorb electrical transients in adjustable speed drives.
- Sensorless Camshaft Phaser Motor Back-Drive Commutation
A sensorless brushless DC motor system uses crankshaft back-drive signals for commutation.
- Electric Motor Controller Symmetric Wiring for Current Balance
Symmetric wiring balances driving currents in electric motor controllers, resolving rotational imbalance caused by unequal impedance.
- Inverter Control Apparatus Phase Synchronization for Seamless Grid Switching
A voltage inverter control apparatus synchronizes commercial and inverter output voltages to enable seamless power source transitions.
- High Rotor Pole Switched Reluctance Motor Noise Reduction
A high rotor pole switched reluctance machine design utilizes a numerical relationship between stator and rotor poles to improve noise performance.
- Electric Tool Braking Control for Voltage Jumping and Reaction
A controller manages inverter switching elements to balance braking reaction force with regenerated energy voltage.
- Linear Actuator Control for Magnetic Pole Position Detection
A linear actuator control device estimates magnetic pole position using pulse energization and direct current excitation.
- Three-Level Inverter Neutral Point Voltage Balance Control
A three-level power conversion device adjusts gate pulse widths to maintain neutral point voltage balance.
- Energy Storage Module Selection by State of Charge and Temperature
A control device selects series-connected energy storage modules based on state of charge and operating parameters.
- Permanent Magnet Motor Flux Control via Adaptive Current Adjustment
Estimating magnetic flux through voltage models enables adaptive current adjustments that compensate for aging and environmental changes.
- Semiconductor Device Current Measurement Layout
A semiconductor device positions a resistive component adjacent to power transistors on the same substrate.
- Voice Coil Motor Displacement Sensor Using Impedance
A voice coil motor displacement sensor determines position using voltage and current measurements at a predetermined frequency.
- Motor Control Device Regenerative Power Management
Switching control unit manages regenerative power flow in motor drives.
- Sequential Shutdown of Pulse-Controlled Inverter to Limit Current and Voltage Spikes
Switching an electric machine to disconnect mode then short-circuit mode limits phase current increase and d.c. link voltage rise during malfunction.
- Power Semiconductor Module Stress Relaxation Barrier
Segmented glass films with composite materials reduce warping-induced cracking and prevent moisture penetration in power modules.
- Current Detection Device Skin Effect Suppression
Opposing conductors route shunted current to a magnetic field detecting element for precise radio frequency measurement.
- Fan Rotation Control Circuit Using Analog Charging-Discharging
A rotation control circuit uses a charging-discharging unit to generate forward and backward motor commands.