Single Motor Speed/Torque Control TRIZ Cases

Dynamic speed control cuts no-load energy waste in a high-power stand-alone motor unit while preserving torque and bog-down behavior.

Linear rotor position sensing enables precise BLDC commutation timing, cutting jitter and torque ripple even at low and high speeds.

Two Hall sensors spaced at least 10° use a 3x pole-pair control magnet to detect startup direction while keeping BLDC motors compact and low cost.

Switch-signal timing lets a ceiling fan BLDC motor change speed and direction without relying on visible wall switch settings in dim light.

A field coil saturates the rotor bridge to switch magnet flux leakage, balancing high-speed operation with higher torque and output.

A simple sensor-driven commutation circuit lets brushless actuators run on two-wire control while tolerating high temperatures and reducing EMC issues.

Body diode detection adjusts PWM offset timing at zero-crossing microsteps to reduce current overshoot and improve stepper motor positioning.

Variable duty-cycle motor control enables rapid power tool restart before full shutdown, cutting delay and improving braking-to-start transition.

Closed-loop load control keeps a retractable resistance line within a target speed band, enabling versatile strength training on one connected machine.

Sensor feedback adjusts motor stroke to compensate borescope cable slack, preserving articulation responsiveness as cables stretch over time.

A protection circuit checks switch state before battery connection and blocks unintended motor startup in electric tools.

A magnetic sensor and actuator replace worn potentiometer contacts, enabling precise speed and reversing control in electric tools.

Correcting target speed from actual motor speed suppresses speed drop during current-to-speed control switching in hydraulic pressure generation.

Segmented travel moves and selectable motion profiles improve automated footwear lacing while supporting modular assembly and serviceability.

A parameter conversion server maps settings from old electric drives to new models, cutting reconfiguration time while preserving efficiency.

Position-based PWM voltage adjustment keeps power rake column motion uniform across changing loads while reducing PMDC motor noise.

A three-sided cooling plate channels heat from stator coils, improving motor thermal management while supporting compact high-power operation.

Amplitude and frequency ramping let BLDC window shades make short solar-tracking moves quietly and precisely without slow feedback loops.

A step-down circuit offsets diode and resistor drops in a bootstrap supply, keeping high-side gate drive voltage stable.

Back-EMF sampled during motor off-time lets the controller estimate hose length and keep retraction speed constant, reducing end-of-reel damage.

Replacing bulky current transformers with voltage division circuits reduces controller volume while maintaining detection coverage.

A pre-driver circuit manages gate potentials to stop parasitic switching in motor drivers.

A fan filter circuit suppresses electromagnetic interference noise using an amplifying element in an active region.

A control apparatus adjusts voltage and current to operate a high-power electric motor in selectable modes.

A control device determines rotor position using a second transmission gear to reduce mechanical play influence.

The system uses a beam detection signal as a reference to resolve jitter in the motor feedback signal, ensuring accurate face specification during assembly.

Relocating the Hall sensing module to the gear reducer eliminates internal magnetic interference, improving detection accuracy and maintenance ease.

A variable-speed controller uses a membrane contact surface to adjust resistance via a sliding slider mechanism.

A motor control system synchronizes torque commands across multiple devices via a communication line.

A controller uses a non-contact sensor pulse to correct accumulated position error from a friction wheel encoder, maintaining accuracy at low speeds.

Closed-loop feedback control enables inner rotor brushless DC motors to match stepping motor precision while maintaining energy efficiency.

A vehicle electric pump motor drive device sets target values using asymmetric delay periods to manage control response speed.

A motor control apparatus adjusts current supply switching cycles based on torque margin to increase rotor speed.

A low-pass filter removes high-frequency noise from encoder signals to enable accurate motor speed detection in self-propelled endoscopes.

A controlling circuit stabilizes neutral voltage via a switch circuit connected to a fixed potential.

A multi-phase motor control method synchronizes phase switching frequencies using a virtual neutral point to maintain sinusoidal current waveforms.

A sensorless brushless motor drive switches from rectangular to sine wave operation using rotor angle detection.

Voltage dividers scale output node voltages for comparator threshold checks, preventing transistor burnout without increasing circuit area.

Switching control unit advances energization timing based on current thresholds and rotational position.

A motor drive circuit merges saturation and constant voltage control sections to switch drive modes using shared output transistors.

A stationary position detection circuit alternates current direction to amplify electrical signals for rotor position determination.

Independent rotor cooling controls permanent magnet temperature, reducing pole wheel voltage and preventing converter damage at high rotational speeds.