Inverter device

An inverter device, comprising:

• a housing;
• a main circuit section including a heat generating element;
• a logical circuit section disposed apart from said main circuit section;
• a first chamber independently formed in said housing for enclosing said logical circuit section and having a totally enclosed structure for preventing foreign substances from entering therein;
• a second chamber independently formed in said housing for enclosing said main circuit section and having a totally enclosed structure for preventing the foreign substances from entering therein, said first and second chambers being disposed so as to form a cooling passage therebetween.

An inverter device, comprising:

• a housing;
• a main circuit section including a heat generating element and a smoothing capacitor;
• a logical circuit section disposed apart from said main circuit section;
• a first chamber formed in said housing for enclosing said logical circuit section and having a totally enclosed structure for preventing foreign substances from entering therein;
• a second chamber formed in said housing for enclosing said main circuit section and having a totally enclosed structure for preventing the foreign substances from entering therein;
• a cooling passage disposed between said first and second chambers for cooling said main circuit section and said logic circuit section, said cooling passage being provided independent of said first and second chambers, respectively;
• and
• a second cooling passage being disposed along an outer surface of said second chamber on a side opposite to said cooling passage, wherein said smoothing capacitor is disposed so as to partially protrude into said second cooling passage.

An inverter device, comprising:

• a housing;
• a main circuit section including a heat generating element and a smoothing capacitor;
• a logical circuit section disposed apart from said main circuit section;
• a first chamber formed in said housing for enclosing said logical circuit section and having a totally enclosed structure for preventing foreign substances from entering therein;
• a second chamber formed in said housing for enclosing said main circuit section and having a totally enclosed structure for preventing the foreign substances from entering therein;
• and
• a cooling passage disposed between said first and second chambers for cooling said main circuit section and said logic circuit section, said cooling passage being provided independent of said first and second chambers, respectively, and said smoothing capacitor being disposed so as to partially protrude into said cooling passage.

An inverter device, comprising:

• a housing;
• a main circuit section including a heat generating element and a smoothing capacitor;
• a logical circuit section disposed apart from said main circuit section;
• a first chamber independently formed in said housing for enclosing said logical circuit section and having a totally enclosed structure for preventing foreign substances from entering therein;
• a second chamber independently formed in said housing for enclosing said main circuit section and having a totally enclosed structure for preventing the foreign substances from entering therein, said first chamber and said second chamber being disposed so as to form a cooling passage therebetween in order to provide for thermal insulation of said logical circuit section from said main circuit section;
• and
• a second cooling passage disposed along an outer surface of said second chamber on a side of said second chamber opposite to said cooling passage.

An inverter device, comprising:

• a housing;
• a main circuit section including a heat generating element and a smoothing capacitor;
• a logical circuit section disposed apart from said main circuit section;
• a first chamber formed in said housing for enclosing said logical circuit section and having a totally enclosed structure for preventing foreign substances from entering therein;
• a second chamber formed in said housing for enclosing said main circuit section and having a totally enclosed structure for preventing the foreign substances from entering therein;
• a cooling passage disposed between said first and second chambers for cooling said main circuit section and said logic circuit section, said cooling passage being provided independent of said first and second chambers, respectively;
• an electro-magnetic shielding member provided on at least a part of said cooling passage for preventing electro-magnetic noise from said main circuit section from being transmitted to said logical circuit section;
• and
• a second cooling passage disposed along an outer surface of said second chamber on a side of said second cooling passage, said smoothing capacitor being disposed so as to partially protrude into said second cooling passage.

An inverter device, comprising:

• a housing having an enclosure for preventing foreign substances from entering therein;
• a main circuit section disposed in said housing on a bottom of said housing and including a heat generating element and a smoothing capacitor;
• a logical circuit section disposed apart from said main circuit section in said housing;
• an electro-magnetic shield member disposed between said main circuit section and said logical circuit section for preventing electro-magnetic noise from said main circuit section from being transmitted to said logical circuit section;
• a cooling passage disposed along an outer bottom surface of said housing, said smoothing capacitor being disposed so as to partially protrude into said cooling passage and having terminals which are disposed at a side of said electro-magnetic shielding member at which said main circuit section is disposed.