manifold 627 fig2 and 25 and integrated with an electronic inverter card 661 populated with control chips bus bars and terminals the coolant manifold 627 may comprise two ports 613 and coolant tubes 673 the ports 613 comprise three coolant passages 659 and a gasket 645 the htd 600 may be inserted into the ports 613 so that the passages 659 of the ports are aligned with the coolant channels 667 of the htd for feeding coolant stream 679 to and from the htd 600 the htd is help in place in the port 613 by the combination of the mounting screw 687 and the end cap 691 for clarity fig2 25 do not show the electrical connections between the inverter card 661 and the hgc 614 on the htd 600 spacers 681 a and 681 b may be sued to hold the armature 683 in place because the inverter in a hybrid electric vehicle handles only transient loads the htd 600 drive excitation of the 3 phase coils 632 a 632 b and 632 c may be only activated on demand such as when the vehicle is accelerating in an all electric vehicle the htd 600 may be operated continuously a temperature sensor may be provided to on the htd 600 or on the hgc 614 to warn of overheating an u201c over temperature u201d signal from the sensor may be used to shut down the inverter or to limit its power throughput referring now to fig2 27 a and.