DC Motor Speed/Torque Control TRIZ Cases

A variable frequency drive connects a resistor bank to an AC motor via a contactor for deceleration.

A PWM circuit spreads signal spectrum across frequencies while maintaining constant duty cycle.

A pulse width modulation controller drives a vibration motor using voltage below the battery minimum.

A motor control circuit switches between open-loop and closed-loop modes to regulate fan rotation speed.

A dual inverter drive system synchronizes carrier waves between inverters to expand switching intervals and reduce surge voltage.

Dynamic torque reduction prevents tipping or deformation of transported goods during variable load and temperature conditions.

A pulse-type rotational position sensor monitors signal outputs to determine rotor position and speed.

Detect failed current sensors by summing phase currents and comparing the absolute value against an open circuit threshold.

Firmware logic monitors zero-current states to detect output phase loss before and after startup without requiring closed-loop control.

A trigger switch actuator uses a pressing member to convert movement into force for precise motor speed adjustment.

Adaptive torque control calculates incremental step lengths to stabilize hybrid motor output during mode transitions.

Remove internal mechanical stops from hobby servo motors to enable continuous rotation and replace potentiometers with encoders for accurate positional control.

A slotted inductance encoder detects linear and rotary displacement, replacing bulky optical sensors to enable compact two-dimensional positioning.

Integrating actuators into the rotor connection assembly generates counteracting forces to reduce fuselage vibrations.

De-energizing stator coils removes magnetic interference, enabling accurate rotor position detection for reliable drum starting.

A linear actuator uses incremental Hall sensors to determine absolute position through automatic calibration cycles.

Adaptive current control modulates stepper motor drive signals according to detected material load, reducing Joule heating while maintaining required torque.

A motor control device segments the control unit into independent operating units to set manipulated variables for each motor.

A motor control apparatus uses a signal relay processing unit to accumulate preparation complete flags from multiple power supply units.

A simulator system generates dynamic load voltages to oppose AC output currents from motor controllers.

A voice coil motor driving device arranges reverse current unit signals to reduce hysteresis effects.

An RCP circuit diverts reverse current through energy dissipating elements to protect power supplies from induced voltage spikes.

A processor calculates motor inductance and resistance using voltage and current sensors to adapt control signals.

An HVAC actuator controller adjusts motor drive signals based on detected operating conditions to maintain consistent torque output.

A coil actuator uses a PWM controller to manage excitation current levels through variable reference values.

A control device identifies mobile screens by detecting actuator responses to power supply interruptions.

A control device adjusts reference time and invalidates counting operations to determine motor lock states accurately.

A load drive circuit uses a protection switch to block reverse current flow through the freewheeling diode.

A double-ended inverter drives a six-phase motor with two independent winding sets.

Merging DC/DC converter with power converter reduces weight and cost while linking voltage levels.

Single capacitor switching eliminates bulky inductances, reducing device complexity while delivering high startup voltage for portable electric motors.

An angular frequency extractor detects current amplitude discontinuities to determine rotor revolution time and generate a precise speed control feedback signal.

Replacing mechanical relays with a solid-state triac and diodes reduces circuit complexity while controlling braking torque.

A vehicle window control apparatus adjusts power supply based on sensed load and voltage to ensure reliable full closure.

A multi-phase motor control system monitors stator resistance to detect thermal overload conditions during steady state operation.

Switch actuation timing determines wiper frequency, reducing driver distraction from iterative rotary dial adjustments.

A traction boost converter generates high DC voltage from low DC sources to power electric motors.

A motor control device sets actual shaft position using absolute potentiometer data and relative surge current detection.

Defect tables map faulty memory locations to spare cells, avoiding full module replacement and preserving system capacity.

A motor driving apparatus manages overcurrents through dynamic gate command adjustments.

A hybrid lawnmower uses a dual power supply to drive the cutting blade via AC line voltage or a DC battery pack.

A surgical instrument controller measures motor current and angular velocity to detect mechanical limits.

A control subsystem refines stator sensor data using operating parameters to maintain measurement accuracy.

Capacitive sensors detect position errors from bearing wobble and thermal expansion, enabling sub-nanometer rotational precision.

Microcontroller adjusts PWM duty cycle based on battery voltage to maintain target motor rotation speed in power-driven nail guns.

A brushless synchronous motor drive system uses feed-forward control to adjust motor increments based on observed coupling.

A control system regulates door force and acceleration based on real-time position feedback.

A controller regulates retarding torque by measuring power in the retarding grid to manage heat dissipation.