Relays TRIZ Cases

A delay timer automatically turns off the ERMS after a preset interval, reducing human error and improving remote switchgear maintenance reliability.

Abnormal current drop detection extends coil supply time only when needed, keeping contactor attraction stable while limiting energy use.

Abnormal current drop detection extends contactor pull-in time only when needed, improving attraction stability under harsh voltage or temperature conditions.

A timed high-to-low coil voltage scheme cuts relay power dissipation and thermal rise while preserving reliable actuation.

Current-change monitoring enables rapid solenoid disconnection detection in PWM inductive load drivers, improving safe-state response.

Excitation current feedback detects vibration-driven contact movement and restores closed-state stability to prevent arcing and uncontrolled opening.

A shared PWM coil driver cuts contactor circuit complexity, board space, and EMI while preserving redundant shut-off paths for battery systems.

A capacitor and voltage comparators convert one control signal into ON and OFF relay commands, preserving compatibility with single-port relay circuits.

A two-stage coil voltage profile uses current-based temperature compensation to keep contactor closing behavior consistent without sensors.

Temperature and control-voltage feedback adjust PWM duty cycle to cut heat load, extend drive life, and ensure reliable switching.

Shifted pulse timing across multiple relays spreads current demand, suppressing power supply ripple while maintaining relay control.

Alternating pull-in and release coil pulses keep bistable relay contacts oscillating at low voltage, cutting heat and improving fault detection.

A delayed switch from holding current to higher switching current suppresses relay coil inrush, cutting component rating and closed-state power use.

A high-voltage pull-in and low-voltage hold path cuts relay coil loss while maintaining contact state and preventing dropout.

Measures relay coil inductance in the non-energized state to detect welded contacts without adding bulky monitoring hardware.

Software interlocking in a bus system blocks impermissible contactor states while keeping communication active and removing auxiliary switches.

Active power factor correction circuit raises power factor from below 0.3 to above 0.9 while reducing active consumption to under 1 VA.

Self-adaptive control means measure excitation coil resistance and voltage to determine mechanical force without additional sensors.

A signaling device generates dynamic pulse signals via voltage dips on a two-wire line to transmit data without redundant connections.

A latching relay driver uses pulsed current signals to toggle contacts, maintaining states without continuous power.

Separate start-up and holding coils reduce electromagnetic interference by using direct voltage for the holding coil instead of pulse width modulation.

An active feedback loop monitors relay coil voltage to prevent damage from transient spikes.

Switching excitation coils from parallel to series connection reduces electrical current and heat generation while sustaining electromagnetic actuation power.

Real-time magnetic flux regulation via a measuring transducer reduces speed fluctuations and contact stress in electromagnetic switchgear drives.

Charging a capacitor prior to switching provides additional current that overcomes internal resistance in small batteries, reducing power supply costs.

Temperature sensors detect overheating in a fail-safe switching module, triggering switch-off mechanisms that prevent thermal runaway without air cooling.

A switching arrangement uses redundant changeover relays to safely interrupt electrical loads without complex mechanical components.

A relay control circuit switches between full pick-up and lower hold-up voltages to energize the coil efficiently.

A pre-assembled switching device integrates separate safety and control circuits within one housing to manage multiple drive outputs independently.

A control circuit provides driving power to switch on electromagnetic relay units and applies lower holding power to maintain the switched-on status.

Merging static electricity prevention circuits onto a single breakup line reduces circuit area while protecting signal lines from damage.

A relay drive unit generates a PWM signal with a preset duty ratio based on detected power source voltage to maintain the relay in an ON state.

A switching element controls voltage to the magnetic coil, preventing chattering and ensuring defined tilting behavior without costly control electronics.

An integrated switch device combines power switches and relays using an electronic timer to complete safe shutdown procedures before opening AC contacts.

A single coil actuator uses a microcontroller and PWM controller to manage drive current.

Control system monitors back EMF waveforms to detect contact wear, reducing asynchronous operations and extending device lifecycle.

Processor synchronizes relay switching with current flow start time to reduce timing errors and extend component life without adding dedicated sense circuitry.

A switching arrangement transmits test signals to relay switching devices for error detection without affecting the relay contacts state.

A dual voltage level circuit drives a latching relay coil using selective current paths to switch states via polarity reversal.

A control circuit uses parallel switching devices and separate voltage sources to drive an electromagnetic relay coil.

A controller detects relay welding by measuring potential differences across multiple relays using a single universal voltage sensor.

Segmented dual relay sub-circuits detect signal path failures through series contact monitoring, preventing false alarms during periodic self-tests.

A load control device detects stuck relays using switched-hot voltage monitoring to identify contact welding conditions.

A relay control device synchronizes a timer with input voltage frequency to determine precise load current zero-crossing points.

A relay drive circuit employs a current mirror and suppression capacitor to stabilize coil current against temperature-induced resistance changes.

A double throw switch uses parallel throw circuits to maintain stable signal states during mechanical bouncing.

A controller detects transition durations to synchronize power source voltages before switching.

A bi-stable relay emulator uses a boost converter to charge an energy storage device for state maintenance.

A solenoid control device monitors drive current variation to detect terminal short-circuits during hunting phenomena.

Dynamic voltage control reduces coil power consumption during the holding stage without increasing device complexity.

An adjustable holding voltage source connects drive coils in series to precisely control current flow.