Solid state motor starter
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United States of America Patent
Stats
-
Jul 24, 1990
Grant Date -
N/A
app pub date -
Jul 19, 1989
filing date -
Jul 19, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A solid state motor starter assembly having controlled semiconductors mounted between heat sink members. Electrical power to the assembly can be connected an disconnected by an electrically operated solenoid that actuates a movable contact into engagement with a stationary contact mounted on the incoming heat sink. To reduce the heat generated in the semiconductor device during steady state full voltage operation, a shunting current path is established between the adjacent heat sinks by an electrically operated solenoid which moves a movable contact bar to engage stationary contact surfaces mounted directly on the heat sinks. Electrically joining the incoming line heat sink to the outgoing heat sink provides a low resistance parallel current path around the semiconductor thereby reducing the heat generated in the assembly during full voltage operation. The above contacts and solenoids can be directly mounted to a heat sink assembly thereby providing the benefits of unitized construction.
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