AC Motor Control TRIZ Cases

A smart electronic power steering system dynamically configures flow rate and maximum pressure settings using a modular design with proportional relief valves.

A neutral point current transducer measures electrical signals to identify open-circuit faults in power converters.

A slip-ring motor drive system switches characteristic curves to generate a torque shock that loosens frozen material inside the mill drum.

A synchronous machine rotor uses air gap harmonics to induce excitation current, eliminating the separate exciter unit.

Activating one bridge arm switch dissipates stored energy as heat, reducing stator current and inverter temperature during freewheeling.

Segmented switching reduces current asymmetry and peak values, enhancing reliability of non-faulty components in rotary electric machines.

A rotation angle calculation apparatus uses a correction unit to adjust motor control signals based on resolver data.

A modular motor drive control subassembly detaches from the power unit for offline programming.

Digital signal processing detects back electromotive force to compute countermeasure drive signals.

Segmented cooling structures dissipate heat from intelligent power modules, resolving overheating risks during vehicle miniaturization.

A control apparatus selects one-phase current values during sensor faults to maintain motor operation.

A dual processing unit control architecture distributes voltage vector and signal determination tasks across separate hardware modules.

Selective switches in the DC bus eliminate resonance currents and enable bi-directional power flow, improving drive stability.

Hardware current limit circuit prevents microcontroller response delays from damaging power switching devices during unexpected high current spikes.

Segmented safety and motor units prevent intermediate circuit excess voltage during shutdown, ensuring reliable operation.

Independent inverters switch to half-wave driving when a power rail fails, ensuring continuous motor operation without complex real-time decisions.

Microcontroller extends low-side duty cycle into the next period to prevent short pulses when phase duty approaches 100 percent.

A linear actuator control method sums a base commutation angle and a damping angle to drive inverter segments.

Calculating direct current input from winding phase currents and duty factors eliminates temperature sensors, preventing electronic component overheating.

A half-bridge driver circuit integrates measurement terminals and a synchronization circuit to acquire digital samples of motor phase currents directly.

Adjusting Back-EMF sensing thresholds reduces timing errors and power consumption during PWM on-time.

Calibrated voltage profiles regulate stack voltage during fuel cell start-up via a DC-DC boost converter.

A brake chopper control method disables the switch during specific time instants to enable accurate phase current sampling in frequency converters.

A power conversion device housing enables side and upper access to internal components using guide rails and protrusions.

Dividing PWM pulses into shifted half-pulses reduces AC components and minimizes magnetic field emissions in electrical machines.

A method estimates braking resistor value using bus capacitor capacitance and motor current during power converter operation.

Peer-to-peer communication between modular control devices coordinates linear drive sections without central supervision, reducing hardware complexity.

A current sensor offset compensation method uses temperature difference to detect abnormalities without extra hardware.

A motor system uses a control unit to transmit power through the first inverter and motor to charge a second battery.

A modular variable generator synthesizes composite power from individual wavelets using a dynamic control arrangement.

A controller detects terminal voltage to determine rotor rotation state and issues a lock instruction for electrical braking.

A synchronisation source combines three phase voltages and currents to produce a summer output signal with constant amplitude exciter frequency.

A stepping motor controller adjusts command pulse frequencies to maintain rotation stability.

A logic circuit processes discharge control signals and rectangular wave signals to drive a switching element for capacitor discharge.

Detect load deviations between parallel electrical machines by estimating unmeasured currents from measured supply line values.

A control system automatically discovers motors and populates configuration files using topology information.

An RC filter removes harmful narrow pulses while a compensating circuit restores width, protecting IGBTs from overheating and preserving modulation accuracy.

A semiconductor package structure uses surface mounting to connect chips directly to circuit boards, enabling double-side cooling.

A bidirectional switch connects series switches and capacitors in a modular multilevel converter submodule to generate output voltage.

Bent gaps between central wiring lines prevent warp and block water ingress paths to enhance module reliability.

Self-discharge static eliminator produces negative air ions to neutralize positive charges on vehicle power control unit cases.

Replacing analog circuits with a microcontroller unit simplifies circuit structure while improving control accuracy.

A soft starter adjusts conduction intervals to minimize torque ripple during mode transitions.

A controller manages inverter switches using pulse width modulation to reduce input current toward zero during electric drive faults.

An operational amplifier uses an offset current generator to adjust input currents for precise output signals.

Connecting one phase winding to a constant potential and shifting PWM signals reduces switching losses and AC voltage components in the power source.

Dynamic gate resistance control reduces over-voltages and switching losses during fast power transistor turn-off.

Controller generates torque ripple opposite to crankshaft rotation to synchronize cycles, reducing accessory belt slip and abrasion without special pulleys.