DC Motor Speed/Torque Control TRIZ Cases

A phase lock loop controller locks a clock signal to motor frequency using digital oscillators.

A gate driver safety circuit manages PMSM field weakening operations by switching low side transistors on and high side transistors off.

Lowering motor speed during voltage fluctuations reduces noise while maintaining airflow.

Segmented potentiometers provide accessible address selection, resolving difficult access locations in compact HVAC actuator installations.

Double-layer capacitors store braking energy in mobile port cranes, reducing brake resistor heat loss and lowering pollutant emissions.

A controller reduces motor speed via drag torque to enable rapid smoothing capacitor discharge.

A vehicle window control apparatus updates learning data using distinct coefficients for open and closed door states.

A motor driving circuit updates current control signals in steps to match target values without continuous microcomputer processing.

A feedback control method synchronizes phase current detection signals using sequential digital conversion and pole position correction.

Redundant magnetic float switches trigger a microprocessor controller that manages AC power switching and backup battery operation to prevent overflow failures.

A voltage converter system segments reactors to stabilize DC power supply voltage and reduce output ripple.

A multi-axis stage actuator uses position-dependent compensation ratios to correct force-ripple and side-forces.

A surgical stapler uses a frame sensor to control an electric motor, resolving force optimization challenges during tissue stapling.

A brushless motor control system regulates rotation speed by processing environmental temperature and clock signals to generate adaptive pulse duty cycles.

Variable motor speed stabilizes cam rotation, increasing frame speed while preventing follower disengagement.

Analysis of induced voltage characteristics calculates rotational speed and torque, eliminating the need for a tachometer to reduce device complexity.

A movable barrier operator system coordinates dual gate movement using distinct speed and acceleration profiles to prevent physical interference.

A centrifugal switch actuator uses asymmetric contact lengths to prevent momentary high currents.

A motor control method dynamically adjusts driving force to maintain target velocity during operation.

Cam-driven stroke switches detect cover position to stop the motor, preventing blockage and corrosion.

A piezoelectric driving apparatus adjusts power supply timing to position a moving unit along a shaft.

Segmented AC power drives two DC motors as alternating ground paths, reducing heat loss and increasing torque output.

Dynamic pitch adjustment reduces thermal cycling and vibration while maintaining processor throughput.

Digital delta-sigma modulation reduces die size and power consumption while maintaining precise rotational speed control.

Segmenting calculation into active and standby modes maintains rotation angle tracking while reducing current consumption during ignition-off periods.

A motor controller normalizes torque commands and limits against physical and theoretical thresholds to manage permanent magnet motors.

A loudspeaker array signal generator replicates virtual sound sources using a two-stage processing architecture.

Alternating fan rotation removes foreign particles from heat transfer surfaces, maintaining thermal efficiency without adding device complexity.

An electric actuator uses a control program with six modes to emulate fluid pressure cylinder behavior.

A drive wave generation circuit outputs variable frequency waves to determine initial lens position without external sensors.

A linear electromagnetic propulsion system uses independently controlled electromagnets to generate variable force and speed through remote pulse signals.

An adaptive window control apparatus delays motor speed reduction at higher vehicle speeds to overcome aerodynamic loads and ensure full glass closure.

A stabilizer control device uses a brushless motor with excitation switching to manage vehicle roll.

Iterative subtraction of signal products removes systematic errors and reduces evaluation circuit complexity.

A capacitor protector circuit manages power flow in electric vehicle motor drives using a common resistor and DC-to-DC converter.

A sealed electric compressor integrates a normally-off pressure switch parallel to the main winding with a series fuse element.

Autopilot actuator applies hydraulic pressure to the steering cylinder for rudder movement.

Real-time voltage and current measurements determine motor parameters to eliminate residual braking torque caused by temperature variations.

A control device adjusts windshield wiper wiping frequency based on vehicle speed and load thresholds to reduce energy input.

Adjusting inverter switching frequency reduces mechanical stress on IGBTs and prevents bond wire failures during high-current start-up conditions.

A DC motor current limit control method uses a reference voltage and power switch voltage drop to regulate power delivery.

Segmenting the reduction gear into two stages coupled by a disengageable clutch overcomes self-locking to enable manual emergency operation of transit doors.

An inverter operates in an emergency mode to maintain electrical connection with the electric machine.

A motor control circuit sets identification information based on a magnitude of setting voltage input from outside.

A feed controller adjusts target operating positions to minimize cyclic torque influence on inkjet media movement.

Segmented detection pathways combine fast hardware response with redundant software verification to prevent motor operation during fault conditions.

Control system reduces armature current via power converter adjustment before engaging mechanical interrupting devices, extending component lifespan.

A full bridge circuit controls output voltages to prevent reverse current flow in DC motor systems.

Multi-node thermal model predicts rotor copper dissipation and bearing temperature to limit power only when necessary, extending service life.

A unidirectional rain detection signal transmission line uses short-circuit impedance manipulation to convey reverse data from the wiper driving device.