Dynamo-Electric Machine Testing TRIZ Cases

Electrical power spectrum analysis reveals early machine faults and their location without vibration sensors, reducing unplanned repairs.

Nameplate-based motor type identification combines measured data lookup or nominal-efficiency simulation to speed loss estimation without sacrificing accuracy.

Nameplate-based motor type matching combines measured efficiency tables with model simulation to speed loss estimation without sacrificing accuracy.

An electrical scan brush and closed-loop feeder sort hairpins with damaged insulating film in real time, cutting manual inspection time and cost.

Single-phase excitation tests a three-phase motor by regulating current at two terminals, avoiding mechanical locking while preserving test accuracy.

By matching the motor driver switching frequency, this motor emulator cuts switching loss while maintaining accurate inductor current tracking.

Dynamic current limiting with rising motor speed keeps copper loss density stable despite skin effect, improving peak performance testing.

Tilting a rotary table exposes centrifugal and gravitational effects, improving current-based misalignment detection for balanced workpieces.

A signal isolation circuit and edge counter measure motor-switching duty cycles while limiting noise and phase-delay effects.

A tri-axial magnetic sensor measures field strength along orthogonal axes to identify rotor faults via slip frequency amplitude comparison.

Active load control circuitry adjusts resistance based on real-time power monitoring to prevent false failures caused by belt slip.

Current noise cancellation removes baseline interference from stator signals, enabling early detection of generalized bearing roughness without false positives.

A portable magnetic burst tester uses PWM drive modules to deliver high current pulses from a standard wall outlet.

A method determines individual motor parameters by testing current values against stored sets to enable precise control adjustments.

Segmenting non-stationary current signals resolves peak detection difficulties in variable-speed drives without complex hardware.

Fixed reference node comparison detects magnetic field asymmetries in running motors, resolving reliability and measurement precision trade-offs.

A rotating machine assessment device calculates index values from electrical data to estimate residual withstand voltage and remaining life.

Analyzing current flow gradient deviations against predefined ranges detects bending effects and coupling clatter, preventing inaccurate tank leakage diagnoses.

A rotor measurement unit draws power from inherent electromagnetic induction during standstill operation.

Radio frequency current transformers detect arcing signals in collector assemblies to enable health-based maintenance and prevent catastrophic flashover events.

Adjustable stator and rotor fixtures unify axes to resolve compatibility issues across multiple motor types.

A rotating rotor bracket with excitation and standard coils detects turn counts via galvanometer deflection.

Comparing measured radial flux against expected values derived from air-gap thickness detects shorted turns without machine shutdown.

Static DC injection calculates excitation parameters without load disconnection, eliminating voltage drop errors from stator resistance.

A motor commutation testing circuit uses a selector to switch between detected and simulated signals for control.

Sequential phase energizing positions the rotor to reduce starting noise and thermal load on power semiconductors.

A probe deflects transversely within an air gap to inspect stator windings without rotor disassembly.

A transient bidirectional rotating magnetic field pulse interacts with generator rotor windings to produce reflected waveforms for analysis.

A maintenance checking system measures drive motor no-load current to classify dental handpiece usability before operation.

Frequency converter drives rotor excitation to simulate generator operation states, eliminating rotor removal and reducing testing time.

A flux probe measures magnetic field variations in the air gap to generate difference signals for rotor winding fault identification.

Voltage-normalized impedance calculations eliminate misdiagnoses caused by terminal voltage variations, ensuring accurate anomaly detection.

Comparing measured spectral components against theoretical models eliminates ambiguity from load conditions and contact quality issues.

A detection system calculates normalized cross-coupled impedance from motor sequence components to identify stator winding defects.

An AC to DC boost converter charges capacitors to supply sufficient test current for large motors, enabling broken rotor bar detection via domestic outlets.

A shaft voltage measurement system estimates current using a pre-determined transfer function for electrodynamic machines.

Dynamic testing adapts to rotation speed, performing low-speed diagnostics below thresholds and observing drivers above them to prevent thermal incidents.