Electronic Commutators TRIZ Cases
- Motor Start-Up Dead Time Control for Back-EMF Noise Suppression
Motor speed feedback sets start-up dead time to limit back-EMF current, reducing noise and protecting circuit components.
- Encoderless Electric Machine Control With Torque-Gated HF Injection
High-frequency rotor position signals are enabled only above a torque threshold, cutting loss, heating, and noise in encoderless motor control.
- Motor Angle Sensor PCB With Handshake Authentication
A PCB-mounted angle sensor and programmable logic device add handshake authentication, secure parameter storage, and anti-counterfeit protection.
- BLDC Sensorless Block Commutation for Accurate Runup Position Tracking
Stator inductance pulses improve low-speed rotor position tracking during BLDC runup, then switch to Back-EMF block commutation.
- Hybrid Machine Position Control Using Hall Sensor Offset Calibration
A single Hall sensor and stored mechanical-electrical offset replace resolver feedback, simplifying hybrid machine position control and installation.
- Single-Phase Motor Control for Smooth Hall-Based Phase Switching
Timed Hall-sensor phase signals help a single-phase motor escape dead zones, switch phases smoothly, and reduce rotation noise.
- BLDC Motor Phase Compensation Using Back-EMF Freewheeling Detection
Back-EMF freewheeling duration is used to auto-update BLDC commutation angles, cutting manual tuning time and extra sensor cost.
- Brushless Motor Sinusoidal Control With Hall-Based Rotor Prediction
Hall-sensor rotor prediction and advance-angle sine drive reduce phase-current distortion and magnetic sound without costly resolvers.
- Wound-Rotor Synchronous Machine Sensorless Position and Speed Estimation
High-frequency voltage injection and current demodulation estimate wound-rotor position and speed without mechanical sensors or inductance dependence.
- Rotor Position Sensor Offset Determination Using q-Current Plausibility
Validating d-axis candidate values through q-current plausibility checks to improve measurement precision while reducing voltage detection unit complexity.
- EC Motor Trigger Signal Symmetry Compensation
Evaluation unit generates symmetric trigger signals for electronically commutated motors using shift compensation on sensor signal edges.
- Electric Motor Rotor Angle Determination Using Wheel Sensors
A computing device determines absolute rotor angle using wheel sensor data and motor control signals without mechanical encoders.
- Resolver Correction Device Phase Shift Stability
A resolver correction device adjusts phase shift amounts using a dedicated adjuster and frequency error correction unit.
- Power Converter Current Detection Timing Correction
A power converter corrects detected current values to a common reference timing using phase determination signals.
- Rotor Position Detection Using Mutual Inductance in Brushless DC Motors
A device determines rotor position by sampling induced voltage on a floating phase while applying alternating voltages to two other phases.
- Rotor Position Detection via Neutral-Point Voltage Ratios
Detect rotor position using neutral-point voltage ratios derived from PWM excitation states in permanent magnet synchronous motors.