AC Motor Control TRIZ Cases

A dynamic gate drive system adjusts resistance values via buffer switches to optimize switching operations.

Segmenting the charge circuit into independent buffer and boost units reduces required power capacity, lowering cost while maintaining DC voltage stability.

Dynamic voltage limits adapt to IGBT withstand capacity, expanding the usable temperature range while preventing overvoltage damage.

A variable speed drive adjusts flux reference to manage Joule-effect losses during electric motor deceleration.

Short-circuiting inactive motor coils generates opposing torque, preventing unauthorized rotation without mechanical locks.

A space vector modulation method reduces switching losses in three-phase inverters by keeping one phase unswitched during each pulse width modulation period.

A power inverter housing integrates a coolant channel body and cooling fins to manage thermal loads within a compact enclosure.

A control device adjusts gate voltage levels to manage power switching elements in conversion circuits.

A thyristor power converter derives DC voltage from AC signals using a holding circuit to monitor ripples and prevent overvoltage.

An adaptive motor apparatus reduces production costs and wiring complexity by standardizing components across different electrical switch applications.

Overlapping measurement sections generate redundant values to resolve position determination inaccuracies at segment boundaries.

Full-wave control synchronizes module charging cycles with output frequency, reducing energy storage device size and cost in medium voltage applications.

A long-stator linear motor switch defines collision zones using two-dimensional transport unit positions to enable safe simultaneous passage.

A semiconductor module uses distinct wiring inductance to suppress gate oscillation in parallel switching elements.

A control apparatus selects inverter status data based on failure types for targeted nonvolatile storage.

A control apparatus determines command voltage phase and frequency during motor restart to align with input voltage conditions.

Segmented power supply transformers isolate drive circuits from the control circuit, reducing inductance and suppressing switching noise.

Electric machine driving system for oil pumping units combines utility and variable frequency loops to adjust rotating speeds.

A dual mode gate driver switches from voltage to current regulation to optimize IGBT switching performance.

Space vector modulation calculates distortion spectra for switch positions to reduce electromagnetic noise interference in inverters.

Dynamic speed control of a blower motor reduces energy waste from continuous operation while maintaining grid cooling and preventing ice formation.

A variable torque electric motor assembly uses a controllable magnetic device to adjust rotor flux and modify output torque.

Merging the DC-DC converter with motor drive circuits suppresses circuit size and cost increases associated with vehicle torque vectoring.

A rear surface-exposed conductor with a groove and press hole prevents resin wrapping around the conductor edge, reducing defects and burrs.

A controller estimates winding currents to maintain high PWM frequency and low noise levels in AC rotating machines.

Dynamic controller switches winding segments based on load metrics, reducing energy dissipation as heat during partial operation.

A sensing coil measures induced voltage from a moving magnet to determine micro-mirror position.

Inducing controlled short circuits cancels second harmonic power vectors, eliminating ripple torque without adding weight.

Segmenting the bridge circuit into upper and lower parts with distinct FET types resolves efficiency versus switching speed trade-offs in fan motors.

Matching phase voltage vectors to rotor pole wheel voltages prevents current overshoot and mechanical loads during high-speed switching.

Controller switches boosting circuit modes based on reactor current to reduce power loss in power supply apparatuses.

An active control element shifts the common connection point potential, enabling independent phase regulation while reducing equipment expenditure.

Separating low and high voltage zones on a single board surface reduces electromagnetic noise interference while maintaining compact space-saving properties.

A direct AC power converter reduces inrush current by dividing clamp capacitors into series segments controlled via a neutral line switch.

A multi-phase converter controller determines basic and correction duty ratios to balance phase currents.

A pulse width modulation method calculates reference signal derivatives to optimize switching sequences and reduce energy losses.

A position sensor and controller automatically deactivate the vibration mechanism when downward force is insufficient.

A motor drive control device generates pseudo sine wave excitation patterns using duty ratio measurement and arithmetic calculation.

A motor control system adjusts drive signals using duty cycle and speed feedback to maintain balanced current waveforms.

Dynamic carrier waveform modification prevents simultaneous turn-on events, reducing voltage spikes across semiconductor devices.

A test apparatus simulates prime mover, AC machine, and power converter behaviors using computational units for controller validation.

Omitting a zero potential switching state in space vector pulse width modulation to extend the maximum degree of modulation.

Detecting field voltage zero crossings through stator current asymmetry allows the motor to switch from induction to synchronous mode, reducing component wear.

Hardware circuits with current conveyors and memristors simulate nonlinear phase inductance, resolving conflicts between accuracy and computing power.

A silicon carbide MOSFET uses a non-ohmic conductive layer to block bipolar current flow during free-wheeling operations.

Alternating DC braking and freewheeling patterns manages stored inductive energy, preventing overvoltage damage during load shedding.

Segmented coils driven by phase-controlled currents provide strong electromagnetic force to reduce device thickness while maintaining precise lens positioning.

Segmenting the converter into parallel modules lowers switching frequencies, reducing heat generation while maintaining high power capacity.

Controller increases fundamental wave voltage amplitude to expand the voltage limit ellipse for AC rotary electric machines.