US 2018/0006562 A1 · DISCHARGING METHOD OF BUS CAPACITOR, CONTROLLER, DC-DC CONVERTER AND INVERTER

Abstract

A discharging method of a bus capacitor, a controller, a DC-DC converter and an inverter are provided. After a DC-DC converter or an inverter is powered off, in a case that a detected voltage across a bus capacitor of the DC-DC converter or the inverter is determined to meet a preset condition, a switch of the DC-DC converter or the inverter is controlled to be turned on or turned off to cause the bus capacitor, the switch, and a reactor of the DC-DC converter or the inverter to form a current loop, until the voltage does not meet the preset condition. Based on the method, discharging function is achieved for the bus capacitor after the DC-DC converter or the inverter is powered off, without the need for an additional discharging circuit, which solves problems caused by the additional discharging circuit required in the conventional technology.

Claims10

Dependent claims

A discharging method of a bus capacitor, applied to a controller of a DC-DC converter or of an inverter, wherein the DC-DC converter or the inverter comprises a bus capacitor, a switch and a reactor, and the discharging method of the bus capacitor comprises:

detecting a voltage across the bus capacitor;
determining whether the voltage across the bus capacitor meets a preset condition, after the DC-DC converter or the inverter is powered off;
and
controlling, in a case that the voltage across the bus capacitor meets the preset condition, the switch to be turned on or turned off to cause the bus capacitor, the switch and the reactor to form a current loop, until the voltage across the bus capacitor does not meet the preset condition.

1 more element

A controller applied to a DC-DC converter or an inverter, wherein the DC-DC converter or the inverter comprises a bus capacitor, a switch and a reactor, and the controller comprises:

a detecting unit, configured to detect a voltage across the bus capacitor;
a determining unit, configured to determine whether the voltage across the bus capacitor meets a preset condition, after the DC-DC converter or the inverter is powered off;
and
a controlling unit, configured to control, in a case that the voltage across the bus capacitor meets the preset condition, the switch to be turned on or turned off to cause the bus capacitor, the switch and the reactor to form a current loop, until the voltage across the bus capacitor does not meet the preset condition.

1 more element

Dependencies are inferred from the claim text.

Discharging method of bus capacitor, controller, dc-dc converter and inverter

Life of this patent

Discharging method of bus capacitor, controller, dc-dc converter and inverter

Life of this patent

Abstract

Claims10