DC Motor Speed/Torque Control TRIZ Cases
- Digital Filter for Voice Coil Motor Drive Circuit
A digital filter attenuates amplitude in a frequency band including the resonance frequency of an actuator within a voice coil motor drive circuit.
- Motor Controller Backlash Suppression via Integral Sharing
Sharing velocity integrator outputs prevents torque imbalance while gradual preload application suppresses gear backlash without mechanical shocks.
- Vehicle Acceleration Control Torque Reliability Compensation
A vehicle acceleration control apparatus adjusts feedback torque based on input reliability to maintain precise drive performance.
- Sensorless DC Motor Speed Measurement via Current Gradient
A control unit determines rotational speed from current gradients during zero-voltage intervals in brush-commutated motors.
- Dispensing Device Velocity Control for Viscous Materials
A dispensing device maintains constant material velocity by dynamically adjusting voltage and pulse length based on real-time current feedback.
- Fan Drive Circuit Current Control for Static Pressure
A drive signal changing circuit restricts motor current when exceeding a threshold to manage fan rotational speed.
- Signaling Work Stop for Machine Tool Positioning
A positioning work stop with a signaling means that activates upon contact to indicate proper placement.
- Industrial Machine Power Controller Using Torque and Speed
A controller calculates total power consumption by integrating motor torque, rotation speed, and amplifier losses without external wattmeters.
- Brushless DC Motor Door Operator Energy Recovery
Replacing brushed motors with brushless units eliminates cogging torque while regenerative braking recovers energy for safe operation.
- Hybrid Vehicle Power Unit with Merged Planetary Gears
Merging planetary gear units reduces power unit size and cost, preventing capacitor overcharge and optimizing energy distribution.
- Photovoltaic Generator Short Circuit Current Sunlight Detection
A photovoltaic generator provides short circuit current and no-load voltage readings to control dynamic system configurations.
- Stacker Crane Control Device Using Encoder and Mark Sensor
A control device uses an encoder, linear sensor, and mark sensor to detect movement distance and absolute position for precise stopping.
- Motor Driving Method Reducing Hall Sensor Sensitivity Requirements
A motor driving method adjusts coil voltage output based on sensed magnetic pole variations to maintain stable operation.
- Vehicle Wiper High Park Position Snow Ice Reduction
Controller toggles between standard and high park positions using existing hardware, reducing winter ice build-up without increasing system complexity.
- Variable Gain Controller for Lithographic Positioning
A variable gain controller adjusts integrator settings based on error signal magnitude to optimize mover positioning accuracy.
- DC/DC Converter Control Device for Sensor Failure Detection
A DC/DC converter control device detects voltage sensor failures by monitoring high-voltage-side and low-voltage-side voltages.
- Motorcycle Reverse Drive Control Logic for Safe Maneuvering
A reverse drive control system inhibits the electric motor when the engine is off or battery voltage drops below a threshold.
- Motor Current Control for Permanent Magnet Demagnetization Prevention
A motor control unit detects current flow and interrupts the path when exceeding a threshold to protect permanent magnets.
- Reciprocating Compressor Resonance Frequency Control
Aligning the compressor operating frequency with its calculated mechanical resonance frequency reduces energy transformation losses caused by load variations.
- Synchronous Motor Control System for Magnetic Pole Position Correction
A control system shifts current phase to maximize torque using magnetic pole position correction.
- Transformer Unit with Oppositely Wound Reactors for LED Current Control
Oppositely wound reactor pairs in a transformer unit equalize current across parallel LED strands, resolving uneven brightness caused by voltage differences.
- Motor Control Device for Multi-Motor Driven Body
A motor control device switches excited motors to un-excited states based on detected physical quantities.
- Surgical Irrigation Pump Priming with Tube Set Memory
A control console reads tube set memory to regulate pump motor flow rates and execute automatic priming cycles.
- Motor Control Device Shunt Resistor Thermal Stress Management
Integrated shunt resistor design manages heat dissipation and vibration stability by distributing thermal expansion stress through area-contact welding.
- Inductance Encoder for 2D Positioning
An inductance encoder detects linear and rotary displacement with one coil set, replacing bulky optical sensors to reduce device complexity.
- Back-EMF Sensor Circuit for Brushless DC Motor Control
A back EMF sensor circuit measures voltage order across motor phases during off-time to determine commutation sequence.
- DC Motor Rotor Speed Control via Adaptive Pulse Timing
Adaptive pulse timing stabilizes rotor speed against external shocks, ensuring accurate timekeeping while minimizing device complexity.