AC Motor Control TRIZ Cases

Shared communication network replaces separate hardware interfaces, reducing circulating currents and signal noise interference.

A bootstrap capacitor recharging method synchronizes energy transfer with spinning motor states.

A bus capacitor charges rapidly using an inductor and restrictive circuit to dampen resonance effects.

Dynamic switching patterns mitigate torsional resonance excitation by altering harmonic spectra during low-speed drive operation.

Dynamic duty cycle compensation eliminates output current unbalance caused by communication delays and semiconductor variations.

A power feed control system manages current flow between drive units and a common battery, preventing over-charging or over-discharging to reduce degradation.

Reconstructed modulated voltages improve rotor speed and angle estimation accuracy, reducing PWM frequency and switching losses.

A variable frequency drive controller switches between space vector and discontinuous pulse width modulation techniques to manage thermal stress.

Analyzing output voltage decay rates differentiates healthy, hard-welded, and soft-welded contactors to prevent battery degradation.

Processing circuitry estimates motor coil temperature using terminal voltage and duty ratio calculations.

A bent lead frame positions an island closer to a heat sink to reduce bonding wire connection angles.

Adaptive modulation selection minimizes harmonic distortion and switching losses while maintaining motor efficiency.

Control coils adjust magnetic flux in a dual channel permanent magnet generator, eliminating reduction gearboxes and reducing system weight.

A single trigger mechanism controls motor direction and variable power output.

An inverter and variable ratio transformer control capacitor discharge impedance, prolonging energy delivery duration while maintaining constant output voltage.

An inverter unit estimates permanent magnet magnetic force using motor signals to assess operational status.

Motor driving system eliminates bulky boost converters by reconfiguring inverter switching elements to supply high-voltage battery charging.

A drive apparatus transmits physical quantity and failure signals via a single terminal using pulse-width modulation.

A power converter adjusts dead band width based on active current to maintain DC voltage balance.

A control unit modulates switch edges via measured voltages to reduce high-frequency interference.

Adjusts hydraulic pump tilt angle to supply exact operating oil volume based on motor speed and valve manipulation.

A pitch drive device uses an IPM synchronous motor and DC energy storage for emergency rotor blade adjustment.

A motor drive system adjusts torque command limits on a buffer servomotor to manage flywheel rotation speed and store DC power from the link.

Segmented windings and separate power converters isolate faulty phases, preventing unbalanced machine loads that cause torque ripple.

A multi-motor frequency control system calculates and distributes vibration signals to multiple motors.

A microcomputer network synchronizes drive timing via inter-unit signals to prevent torque pulsation during operation.

A power converter uses MOS FETs and IGBTs to boost battery voltage efficiently.

Dual protection circuits absorb overvoltage signals at the rectifier input and DC bus to safeguard motor components.

Integrated transformer windings redirect 5th and 7th order harmonics, reducing distortion from 26.6% to 4.5% while minimizing material weight.

A three-level inverter converts three-phase AC voltage to DC for battery charging using controlled switching elements.

A common ground architecture connects multiple circuit units to a shared reference plane, simplifying redundant power source configurations.

PWM duty cycle adjustments reduce impact and noise while minimizing heat generation in electric shift-by-wire systems.

A segmented stator motor uses rotationally offset components to nest windings and reduce torque fluctuations.

A motor control apparatus calculates voltage commands using proportionality constants to maintain accurate current tracking at high speeds.

An active reflected wave canceller injects nanosecond pulses to break inverter voltage edges and cancel traveling waves at motor terminals.

A command modulation section offsets voltage commands to stabilize phase current detection in an inverter control apparatus.

Charge-discharge circuit switches auxiliary power supply to motor conduction path during battery failure.

A motor driving apparatus estimates phase current using a single DC-link resistor and controller algorithms.

Pascal-based step signals create frequency notches to eliminate resonant ringing, reducing settling time in motor systems.

Dynamic frequency adjustment balances electromagnetic noise and switching loss across varying motor speeds, improving NVH performance.

Parallel inverters adjust active unit count to match target power, reducing energy loss from excessive system load.

Auxiliary rectifying unit with blocking diodes supplies controller power to bypass failed H-bridge cells, maintaining stable operation during input faults.

A rotation speed control system converts phase-cut AC signals into DC waveforms to drive EC motor windings.

A dual star winding inverter operates pulse-controlled bridges to drive an AC motor.

Segmented switching reduces high-speed PWM losses by converting DC to half-wave rectified sine voltage first.

A controller adjusts current amplitude and phase to maintain torque output in single-inverter mode.

A power steering control apparatus adjusts PWM carrier periods to reduce electromagnetic noise.

Shared inductor windings and semiconductor switches provide voltage boosting for rechargeable energy storage systems, eliminating additional DC-DC converters.

Fixed calculation with variable sampling reduces harmonic energy concentration while maintaining algorithm simplicity.

Dynamic vector selection reduces capacitor current fluctuations at high motor speeds.