Electronic Commutation Motor Control TRIZ Cases

Reverse rotating d-axis current vector trajectories reduce induced pulse voltages, enabling stable high-speed operation within inverter limits.

A control device for a three-phase rotary machine calculates d-axis and q-axis currents to superimpose harmonic components on dq coordinates.

A phase detection method calculates normalized amplitude values from three-phase signals to determine vector phases for synchronous motor control.

A fan motor drive device calculates rotor magnetic flux intensity to adjust control values for vector control.

Control unit segments braking and protection functions in an H-bridge drive to prevent inadvertent motor rotation during overcurrent events.

A motor control device corrects rotor angle using detected current from a direct-current power source to simplify hardware configuration.

A motor control apparatus detects miswiring in parallel synchronous motors using vector control current division.

Switching stator coils to series connection raises resistance by 4.5 times, delivering higher heating power without demagnetizing the rotor.

Dividing output voltage pulses into multiple segments with single polarity outputs reduces copper losses caused by overlapping zero-phase currents.

A motor driving apparatus synchronizes conduction timing with back electromotive force using a phase error detecting unit and compensator.

A hybrid closed loop control method generates torque commands using estimated rotor position derived from desired speed for electric machine phase current regulation.

Current compensation controller determines corrected phase current values using differential amplifier feedback.

A drive device controller switches between pulse-width modulation and square wave control modes to manage inverter voltage levels.

A motor control unit estimates rotor position using current detection and voltage estimation without a rotational angle sensor.

Estimating magnet magnetic flux and q-axis inductance via ineffective force calculation reduces drive force deviations in unstable environments.

Measuring stator voltage decay after setting currents to zero determines rotor resistance, maintaining flux alignment despite temperature variations.

A motor control module determines a target field weakening current to limit regenerative current using phase advance angles.

Interpolating pre-calculated dynamic offsets at the servo loop rate reduces following error and simplifies gain tuning without increasing computational burden.

A head positioning control method adjusts estimated gains based on disturbance frequency to maintain stable actuator performance.

Segmented d-axis and q-axis current limiting prioritizes d-axis output to resolve steering wheel followability deterioration at high motor rotation speeds.

A motor control device switches between current and voltage phase modes using precomputed lookup tables.

A signal processor performs fixed-to-rotating coordinate conversions while maintaining linearity and time-invariance.

Matrix converter current control mode uses internal inductances to generate reactive currents, overcoming the 86.6% input voltage limit without distortion.

A controller adjusts an inverter to open or short states based on back-EMF voltage levels.

Negative sequence current regulator balances variable-frequency generator currents using frequency-dependent D-axis and Q-axis gains.

Real-time magnetic flux estimation compensates for parameter variations to maintain torque linearity under varying load conditions.

A controller estimates three-phase currents using one sensor and stationary coordinate calculations.

A hysteresis comparator monitors induced voltage slope during braking pulses to precisely detect vibration cessation in electronic devices.

A comparator circuit monitors bootstrap capacitor voltage to determine motor current frequency and direction during operation.

A motor drive control apparatus adjusts the direct current voltage step-up ratio based on permanent magnet temperature to prevent demagnetization.

Calculating inductance via high-frequency injection estimates rotor magnet temperature without thermal models or cooling system inputs.

A permanent magnet machine controller regulates d-axis and q-axis currents to manage net flux and torque production.

Replacing mechanical sensors with a discrete extended Kalman algorithm maintains observability at zero speed through high-frequency current injection.

A frequency changer adjusts PWM carrier frequency using an integrator that accumulates control deviation values.

An RPM-dependent clutch engages an energy storage mechanism to aid motor direction reversal without external sensors.

A synchronous motor control device converts torque commands using voltage phase angles to maximize output.

An inverter control device calculates current amplitude and phase angle commands to align motor output torque with the torque command.

Stabilizer system reduces power converter oscillations during grid contingency recovery using preliminary action and feedback principles.

Voltage-vector generating unit calculates PWM current distortion rate based on modulation rate to reduce electric motor losses from harmonic currents.

A fan system circuit module uses a drive chip to generate soft-start signals for gradual current increase.

Fine adjustment module calculates compensation ratio for MTPA control to minimize motor current magnitude despite magnetizing inductance saturation.

Processor auto-tunes current regulator gains by determining stator resistance and d-axis q-axis inductance values, eliminating manual tuning inaccuracies.

A control device varies switch-on times in space-vector modulation to distribute thermal load across power semiconductor switches and freewheeling diodes.

Pulse code width modulation motor drive system generates sinusoidal waveforms using ultrasonic carrier frequencies and integrated ASICs.

A motor controller adjusts torque output based on rotor speed thresholds to maintain fluid flow in HVAC systems.

Control unit determines phase currents at spaced angles to estimate fundamental components, reducing switching losses and waveform distortion.

A power conversion device switches modulation processes based on voltage command differentials to manage capacitor ripple current.

A resistor-diode and capacitor-Zener circuit generates constant voltage for anti-series transistor gate control in electric tools.

Analyze duty cycle frequency to identify inverter control methods, resolving power loss accuracy issues across varying operating points.

A control circuit detects resistance, inductance, and back-EMF to select motor parameters from a stored database.