Electric Motor Control TRIZ Cases

Asymmetric inverter control with opposite carrier phases cancels common-mode currents, reducing leakage current concentration.

A torque command limit unit adjusts deceleration torque based on DC link voltage levels to manage motor stopping behavior.

Integrating a reversible DC-DC converter with a DC bus prevents motor backspin when external network power fails.

Controllers acquire cross-system power supply relay information through signal lines to detect abnormalities and prevent erroneous determinations.

A controller measures and counts current pulses exceeding a threshold to protect motorized devices from damage.

A motor driving device measures time between normal position detection signal edges to maintain rotational frequency control.

Sub-control device compares main control signals to detect abnormalities without a LAN circuit.

A four half-bridge inverter circuitry controls three-phase AC motor coils using a common bus voltage and microprocessor sequencing.

A parameter selection support system calculates allowable ranges for operation pattern and mechanical condition parameters based on drive device capacity.

Calculating effective resistance adjusts flux references, stabilizing estimation against DC link voltage variations caused by wheel slip.

Segment VFD and non-VFD motors using Dynamic Time Warping to eliminate false detections and enable accurate rotor fault analysis.

A motor control device switches between three-phase and two-phase modulation drives based on rotational speed.

Dual processing circuits calculate operation amounts using integral elements to suppress torque fluctuations from sensor discrepancies.

An electrical connector assembly transfers back electromotive force from a decelerating motor to energize an idle drive.

Coupled integrators in positive and negative sequence systems detect high-impedance phase failures before workpiece damage occurs.

A three-phase regenerative drive employs multiple pulse width modulation strategies to manage current flow and reduce switching losses.

Segmented drive system uses motor torque to mesh pinions with landing gear wheels, reducing fuel consumption and noise during low-power ground operations.

A parallel resistance and inductance circuit suppresses voltage reflections at the inverter output.

Periodic switching between upper and lower arms distributes heat to prevent smoothing capacitor overvoltage during regenerative control.

A system programs universal motors to match original specifications, enabling rapid on-site replacement without specialized hardware.

A lookup table retrieves friction torque values based on motor current and rotor speed to generate a compensated torque command.

A motor control system adjusts position controller gain based on rotor acceleration to handle load inertia changes.

A downhole power system utilizes dual direct current and alternating current sources to energize submersible equipment.

A motor control system manages current fluctuations in folding partitions using dynamic threshold profiles.

A power conversion controller stores phase-correlated deviation values to compensate for current distortion in real time.

Supervisory control system prioritizes load sharing between battery and generator to prevent voltage drops during rapid discharge transitions.

A magnetic pole position detector applies high-frequency voltage commands to estimate rotor alignment without physical rotation.

A screen actuator uses temporal set values to control winding member angular position.

High drive current commands dissipate regenerative energy, enabling open-loop velocity control through zero speed for transformer-driven motors.

Normalizing rotor speed by the DC link voltage change ratio stabilizes PMSM torque transfer when the inverter output voltage limits exceed command voltage.

A hydraulic pump operating device manages variable speed motor frequency based on discharge pressure variation ranges.

Variable torque caps adapt to motor speed, balancing rapid acceleration against current limits and power efficiency.

Integrating absolute position measurement with switching logic in one housing resolves the trade-off between precise control and structural complexity.

Independent hardware counter measures phase pulse width sums to generate fault signals without controller dependency.

A motor thermal protection circuit connects a temperature-dependent resistor in series with phase winding switches to monitor winding temperatures.

Segmented protection stages clamp high-energy surges to enable low-capacitance film capacitors, preventing overvoltage failure in motor drive systems.

Polyphase inverter control selects PWM strategies across two three-phase systems, reducing switching losses.

Combining electrical signals with shaft-mounted accelerometer data detects pole slipping, reducing false alarms from electrical-only monitoring.

A controller adjusts motor rotational state based on detected load conditions during low speed rotation.

Analyzing exciter current harmonic content detects stator and rotor short-circuits without expensive high-voltage sensors, reducing system complexity.

A PMSM control algorithm calculates maximum torque per ampere and voltage to generate safe current commands.

Direct AC motor drive using Hall feedback and PWM switching eliminates rectifier losses while maintaining precise current direction control.

A control device for separately excited synchronous machines provides reference values for stator and rotor currents to minimize operating losses.

A motor control device estimates evaluation place temperature using a calculated gain ratio derived from dual detector readings.

A control device adjusts moment-of-inertia values using a difference detection unit to track estimated loads.

Abnormality diagnosis controller monitors voltage sensor detection characteristics during capacitor discharge operations.

A motor-roller controller adjusts pulse width modulation duty cycles to regulate power delivery and stabilize voltage levels.

A measurement unit detects rotor position by measuring phase voltage during zero-current intervals in a polyphase motor.

A controller models braking resistor temperature using electrical power signals and a parameterizable filter.