Electricity: motive power systems – Induction motor systems – Primary circuit control
Patent
1995-01-17
1999-12-21
Martin, David S.
Electricity: motive power systems
Induction motor systems
Primary circuit control
318812, 318801, H02P 528
Patent
active
060053666
ABSTRACT:
A controller for power devices which is not required to individually insulate high and low potential portions and to include an insulated power supply is disclosed. An external controller (6) is connected to a second internal control circuit (4) which is in turn connected to a level shift circuit (5) and a gate electrode of a transistor (Q2). Power supply voltage (V1) is applied to the second internal control circuit (4) for operation thereof. The level shift circuit (5) is connected to a first internal control circuit (3) which is in turn connected to a gate electrode of a transistor (Q1) and a charge pump circuit (7). Control of a first semiconductor circuit is made through the level shift means in response to an input signal generated on the basis of a second main power supply potential, thereby achieving increased responsiveness of the power devices to a control signal and improved integration.
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Fukunaga Masanori
Hatae Shinji
Majumdar Gourab
Oota Tatsuo
Martin David S.
Mitsubishi Denki & Kabushiki Kaisha
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