Application Design Center - Freezer
OV/OC Protection for Inverter Drive
Solutions
Design Notes:
- Protection Application:
- For Inverter Microwave oven, TVS was used to prevent OV either from high line voltage condition or regenerative high voltage from the transformer.
For inverter Magnetron circuits, a WIA fuse was used for S/C protection for any malfunction of the electrical components in the circuitry.
- Solution Description:
- TVS selection depends on the line voltage, nominal load current, maximum surge load current. Typical line voltage around 300Volts. Typical TVS part number 1.5SMC400 A
A time lag (Slo-Blo) fuse was selected due to the inrush caused by the charging current of the large capacitor. Typically, a 5x20mm axial leaded fuse were used, part number as 0215010.P
- Companion Solutions:
- Axial leaded TVS part with various voltage rating for different line conditions.
Other time lag (Slo-Blo) WIA fuse such as TR5, 2AG, 3AG series axial leaded fuse.
- Regulatory Issues:
- Does not apply.
- Unique Features:
- Does not apply.
- Application Warnings:
- Does not apply.
