Electronic Commutation Motor Control TRIZ Cases
- Single-Phase Operation of Three-Phase Drive Systems
Controller minimizes input currents and voltage ripple by adjusting IGBT conduction periods, allowing stable motor drive operation on single-phase power.
- Motor Drive Device Reducing Startup Noise via Variable Duty Cycle
A motor drive device adjusts phase current using variable duty cycles to prevent sudden drops during startup.
- AC Motor Control Device Fourier Series Noise Reduction
Fourier series expansion isolates fundamental current signals from higher order harmonics and offsets to suppress torque pulsation in AC motors.
- Motor Control Device Harmonic Loss Reduction
A motor control device switches to a synchronous correction signal and fixed amplitude when modulation rate reaches a predetermined value.
- Induction Motor Control via Non-Interference Flux Filtering
A non-interference controller and flux response filter stabilize induction motor control by compensating for parameter errors and rotor magnetic flux delays.
- AC Motor Drive System Loss Minimization via Dynamic Pulse Control
Dynamic pulse control minimizes total system losses by adjusting switching frequencies based on real-time load states, resolving efficiency trade-offs.
- Signal Processor for Inverter Control Using Coordinate Conversion
A signal processor performs fixed-to-rotating and rotating-to-fixed coordinate conversions using specific transfer functions.
- Permanent Magnet Synchronous Motor Flux Control
A magnetic flux controller adjusts inverter output voltage based on rotor position to stabilize torque generation.
- Motor Control Device Common Mode Noise Reduction
A motor control device adjusts PWM counts to invert output voltage waveforms across multi-phase systems.
- Motor Control Apparatus for Rapid V/f Transition
A motor control apparatus adjusts voltage and frequency to align with rotation speed.
- Asynchronous Motor Control via Flux Reference Adaptation
A processing unit generates speed trajectories and determines corresponding flux values to maintain motor voltage within a threshold.
- Motor Starter Voltage Control for Semiconductor Switch Protection
A motor starter uses a control unit to sequence semiconductor and electromechanical switches for safe energy supply.
- Neural Network Rotor Angle Offset Compensation for Motor Control
Neural network circuitry generates rotor angle offsets based on instant speed to minimize d-axis voltage.
- Configurable Motor System Replacing Internal Combustion Engines
A configurable motor system uses a modular interface to direct power delivery for specific tools.
- Active Rectifier with Saturable Reactor for Vehicle Power Systems
A vehicle active rectifier uses a saturable reactor to reduce AC voltage before MOSFET conversion.
- Motor Control Device Limit Gain for Torque Preservation
A motor control device computes a limit gain to restrict q-axis and d-axis current command values based on power supply voltage and rotational angular velocity.
- Brushless Motor Switch Defect Detection via Voltage Measurement
A method identifies defective switches in brushless motors by measuring winding voltages and analyzing duty ratios without current sensors.
- Brushless DC Motor Drive Circuit Self-Powered Braking
A motor drive circuit uses inductive voltage to power a gate terminal and brake the brushless DC motor.
- High Thermal Conductivity Plate for Motor Driver Heat Dissipation
A composite metal plate resolves low resin thermal conductivity in motor drivers by bridging the heat sink and cover for effective dissipation.
- Motor Control System Automatic Voltage Adjustment for Instability
A motor control system automatically adjusts voltage commands based on calculated abnormality degrees to mitigate instability.
- Three-in-one AC Servo Drive Integration
Merges separate servo components to eliminate redundant interfaces, reducing space occupation and assembly time.
- Electric Drive Assembly Intermediate Shaft Speed Sensor Placement
An electric machine uses an intermediate shaft to mount standardized sensors, resolving space constraints and coaxial diameter limits.
- Floating NMOSFET Latch-up Prevention via Tunnel Region
A floating-type NMOSFET incorporates a high-concentration n-type tunnel region within its high-voltage well structure.
- Permanent Magnet Synchronous Motor Unidirectional Chaotic Speed Control
Digital signal processing transforms motor current and angular position data to generate single-direction chaotic rotation speeds via space vector modulation.
- AC Rotary Machine Controller Flux-Based Voltage Command
A controller calculates two-axis voltage commands using interlinkage flux model response values and electrical angle speed.
- Motor Control Device Current Balancing for Communication Reliability
Microcomputers monitor power supply currents and adjust command values to prevent communication abnormalities caused by ground potential differences.
- Motor Current Control Unit Voltage Saturation Prevention
A motor current control unit manages armature currents using limit processing and PI compensation to achieve high-speed performance.