US 12,696,822 B2 · Power conversion device and manufacturing method therefor

Abstract

This power conversion device includes cast resin provided at least between an inner wall of a storage portion and a smoothing capacitor and between the inner wall of the storage portion and a resistor, so as to be formed integrally, and heat dissipation and vibration protection for the smoothing capacitor and the resistor can be made by the cast resin. Thus, a dedicated assembly process for a structure for heat dissipation and vibration protection for the resistor is not needed, so that the cost is reduced. In addition, reliability of heat dissipation and vibration protection for the discharge circuit is ensured more easily as compared to a conventional method of pressing only one surface of the resistor to the housing by means such as screw fastening.

Claims14

Dependent claims

A power conversion device comprising:

a power module including a power device;
a smoothing capacitor for smoothing input voltage to the power module;
a discharge circuit including a resistor for discharging electric charge stored in the smoothing capacitor;
a wiring plate connected to the power module and the smoothing capacitor;
a housing storing the power module, the smoothing capacitor, the discharge circuit, and the wiring plate;
and
cast resin included inside the housing, wherein
the housing has a storage portion storing the smoothing capacitor and the resistor, and
the cast resin is provided at least between an inner wall of the storage portion and the smoothing capacitor and between the inner wall of the storage portion and the resistor, so as to be formed integrally.

6 more elements

Dependencies are inferred from the claim text.

Power conversion device and manufacturing method therefor

Life of this patent

Power conversion device and manufacturing method therefor

Life of this patent

Abstract

Claims14