DC Motor Speed/Torque Control TRIZ Cases

See how a vacuum cleaner uses stick length and movement speed sensors to dynamically adjust mot

See how a vacuum cleaner uses stick length and movement speed sensing to dynamically adjust mot

Motor voltage and current feedback hold strong suction early, then taper battery power smoothly to avoid sudden vacuum shutdown.

Back-EMF pulse filtering and counter correction enable accurate furniture motor positioning without costly sensors, even near end stops.

Sensor feedback and microcontroller speed averaging keep electric bed motors at target RPM under varying loads for smoother synchronized motion.

TRIAC firing angle sensing derives dishwasher water level, avoiding extra pressure sensors and unnecessary drain pump noise and power use.

A tapped-winding boost converter switches DC-link voltage to match motor load, cutting partial-load losses in variable-speed drives.

Motor voltage and current feedback hold strong suction early in battery discharge, then taper power to extend cleaning time.

By comparing roll speed with motor speed, the dispenser detects near-empty paper rolls without opening the housing.

When airflow drops below a set threshold, the controller bypasses the VFD and powers the blower directly to keep HVAC service running.

Using attractive and repulsive magnetic forces, this swing control approach maintains user-set amplitude with better motion control and power efficiency.

Dynamic d-axis current adjustment uses bus voltage, speed, torque, and OOV feedback to cut motor current and improve power factor.

Variable motor drive slopes open, hold, and close the ice duct door more smoothly, cutting dispenser noise and power use.

Motor-driven push members open selected refrigerator doors against magnetic sealing force, reducing user effort and enabling multi-door access.

An integrated PFC motor drive cuts mains noise and maintains blender torque and speed across varying input voltage and frequency.

Shorter initial nonconducting periods and higher startup PWM help a linear vibration motor cut rise time while sustaining responsive haptics.

An electrically powered rod feeds commands and power to moving carriers for smoother drape motion, less wear, lower noise, and cleaner wiring.

A motorized slide assembly opens a bottom freezer door without protruding handles while PTC power blocking prevents motor overheating.

A motorized rack-and-pinion slide assembly moves the freezer door and receiving box together, preserving storage volume and airtight sealing.

A motor-driven freezer drawer opens automatically to reduce bending effort, while standby power cutoff lowers energy use when closed.

A leveled drive current lets one wire carry both signals while correction constants improve motor current detection and air-conditioner speed control.

A two-stage arm and carrier release mechanism lowers hanging clothes 20-30 inches beyond 90 degrees without complex pulley layouts.

Multiple fan pressure settings let a computer cooling controller match airflow and speed to thermal load while reducing power use and port demand.

Real-time motor current sensing adjusts rack speed in a fabric treating chamber to prevent overload while maintaining treatment efficiency.

Power is allocated between the electric compressor and heater from air temperature differences to cut battery drain and preserve cabin comfort.

Switching BLDC motor conduction from 120° to 90° raises current pulse duty at low speed, improving Back-EMF rotor sensing and refrigerator power saving.