Filter circuit and filter of direct-current power supply, electric drive controller, and vehicle

A filter for a direct-current power supply, comprising a filter circuit for the direct-current power supply, wherein the filter circuit comprises:

• a positive direct-current bus, comprising a positive direct-current bus input terminal and a positive direct-current bus output terminal;
• a negative direct-current bus, comprising a negative direct-current bus input terminal and a negative direct-current bus output terminal;
• a charging line, comprising a charging line input terminal and a charging line output terminal;
• and
• at least three stages of filter circuits, respectively connected between the positive direct-current bus input terminal and the positive direct-current bus output terminal, between the negative direct-current bus input terminal and the negative direct-current bus output terminal, and between the charging line input terminal and the charging line output terminal.

An electric drive controller, comprising a filter for a direct-current power supply comprising a filter circuit for the direct-current power supply, wherein the filter circuit comprises:

• a positive direct-current bus, comprising a positive direct-current bus input terminal and a positive direct-current bus output terminal;
• a negative direct-current bus, comprising a negative direct-current bus input terminal and a negative direct-current bus output terminal;
• a charging line, comprising a charging line input terminal and a charging line output terminal;
• and
• at least three stages of filter circuits, respectively connected between the positive direct-current bus input terminal and the positive direct-current bus output terminal, between the negative direct-current bus input terminal and the negative direct-current bus output terminal, and between the charging line input terminal and the charging line output terminal.