Synchronous Motors Starters TRIZ Cases
- Motor Controller PWM Signal Adjustment for Current Detection
A motor controller adjusts energization periods within zero vector intervals to enable reliable phase current detection across multiple phases.
- Servo Motor Position Control Hunting Suppression
Switching q-axis current control from integral to proportional mode suppresses hunting and stabilizes the servo motor at the target position.
- Synchronous Motor Speed Estimation Using Low-Frequency Signal Injection
A control system applies low-frequency sinusoidal current signals to estimate synchronous motor speed without requiring precise motor parameters.
- Servo Lifting Control via Force Sensing and Stability Switching
Force sensing computes motor speed while a stability switch prevents unwanted movement when the load touches the ground.
- Fan Motor Speed Control Circuit Linear PWM Feedback
A fan motor speed control circuit uses a selection circuit to switch between reference and comparison signals for drive signal generation.
- Motor-Driven Power Steering Inverter Two-Phase Operation Control
Inverter operating unit projects Q-axis command onto two-phase axis for PI control, maintaining steering assist during single-phase inverter errors.
- Synchronous Machine Stator Current Vector Startup Control
A control method identifies the minimum stator current vector using varying directions to establish reliable motor startup.
- Fuel Cell Drive Relay Control for Reverse Current Protection
Controller adjusts fuel cell voltage to prevent reverse current flow through the drive system relay.
- IPM Machine Torque Command Limit for Inverter Protection
A controller limits torque commands based on voltage-to-speed ratios to manage current in IPM machines.
- Rotor Position Deviation Measurement in Permanent Magnet Synchronous Motors
A control unit processes d-axis DC and q-axis AC voltage signals to estimate rotor position deviation in permanent magnet synchronous motors.
- Path Display Apparatus for Servo Adjustment with Correction Data
A path display apparatus subtracts correction data from position commands and feedback to show separate command and feedback paths.
- Power Converter Filter Current Estimation for Motor Control
A power converter controller estimates filter currents from inverter output signals to generate switching control.
- Regenerative Variable Frequency Drive Active Converter
Active converter handles regenerative power from single-phase sources, eliminating DC bus voltage rise and dynamic braking resistors.
- Power Module Inductance Reduction via 3D Stacked IGBT
Aluminum wires interconnect stacked positive and negative IGBT chips to shorten current paths, reducing surge voltage below withstand limits.
- Brushless Motor Drive Control for Noise Reduction
A motor drive control mechanism synchronizes PWM carrier signals with rotational speed to reduce noise and vibration.
- Integrated Semiconductor Module Terminals
Integrates control and power terminals within a molded semiconductor module structure to eliminate separate positive and negative terminal requirements.
- Brushless Motor Control Circuit Using Dynamic Commutation Contacts
A circuit arrangement configures commutation contacts as alternating inputs and outputs to generate control signals.
- Variable Speed Drive System Wear Reduction
A variable speed drive system uses frequency converters and a switching device to manage power transmission, reducing main gearbox wear during startup.