Motor drive device

A motor drive device provided to a control panel to drive a plurality of motors, the motor drive device comprising:

• a first heat radiation part being plate-shaped and including a first plate surface and a second plate surface that is a reverse surface opposite from the first plate surface;
• a second heat radiation part being plate-shaped and being thermally connected to the first plate surface, the second heat radiation part including a third plate surface and being provided with a first normal to the third plate surface intersecting a second normal to the first plate surface;
• a first heat generator to drive a first motor, the first heat generator being thermally connected to the second heat radiation part;
• a first substrate including a first substrate surface provided with the first heat generator, the first substrate being provided with a third normal to the first substrate surface intersecting the second normal;
• a second heat generator to drive a second motor, the second heat generator being thermally connected to the first plate surface;
• a second substrate including a second substrate surface provided with the second heat generator, the second substrate being provided with a fourth normal to the second substrate surface intersecting the third normal;
• and
• a third heat radiation part thermally connected to the second plate surface.