To suppress a ripple contained in current flowing into a DC power supply during one-pulse control in a motor drive apparatus receiving electric power from the DC power supply. A motor drive apparatus 1 includes an inverter control device (10) provided with...

The present invention is to provide an air conditioning apparatus for a vehicle which can prevent power of a battery from being consumed to perform a defrosting operation while the vehicle is travelling, and can continuously perform a heating operation eve...

Provided is a heat medium heating unit comprising a plurality of flat heat exchange tubes (12), PTC heaters (13) incorporated between flat tube portions (12A), a heat exchanger pressing member (15) that presses from one side the flat tubes (12) and the PTC...

An object of the present invention is to provide a small, lightweight, and inexpensive heat medium heating apparatus in which a flat tube heat exchanger and a PTC heater are laminated in a multi-layered manner to reduce a thermal contact resistance theream...

Disclosed is a laminated heat exchanger wherein deterioration of sealing performance of a sealing portion of inlet and outlet header sections due to deformation of the sealing portion can be eliminated, said deformation being generated at the time of havin...