Ohmic-Resistance Heating Circuits TRIZ Cases

Detects shorted triacs in both AC half cycles by sensing current and triggering a crowbar shutdown to prevent heater overheating.

Resistance drift during constant-output heating reveals semiconductor heater degradation early, helping prevent fractures and downtime.

Connecting arms spanning the ceramic block create a recessed PCB link that resists damage and reduces fluid flow disturbance.

Resistance change rate during constant output control predicts semiconductor heater life without thermocouples, reducing fractures and downtime.

Cycloconverter-based power conversion turns three-phase AC into reduced-frequency single-phase electrode power for steadier arc heating and melting.

A cycloconverter converts three-phase AC into reduced-frequency single-phase electrode power, improving arc control and metal melting efficiency.

Varying line density across heating regions enables low-voltage heating control while keeping the conductive pattern less visible.

An extruded soft-elastic pretensioning element presses a PCB power switch onto a cooling surface, improving heat transfer with fewer parts.

A built-in retractable USB plug removes separate charging parts, reducing corrosion risk, packaging, and user carry burden.

Dynamic current control in a camera heating circuit enables fast defrosting and defogging while sustaining heat with lower power.