Semiconductor device
AssigneeFuji Electric Co., Ltd.
InventorRyu ARAKI
Life of this patent
Estimating the term…
Abstract
There is provided a semiconductor device capable of decreasing a switching loss. The semiconductor device has first semiconductor elements (Su)-(Sw) and second semiconductor elements (Sx)-(Sz) connected in series, in which the first semiconductor element includes a low switching loss semiconductor element having a switching loss which is smaller than a switching loss of the second semiconductor element and the second semiconductor element includes a low conduction loss semiconductor element having a conduction loss which is smaller than a conduction loss of the first semiconductor element.
Claims18
A semiconductor device having:
- a first semiconductor element and a second semiconductor element, connected in series,
- wherein the first semiconductor element includes a low switching loss semiconductor element having a switching loss which is smaller than a switching loss of the second semiconductor element, and
- the second semiconductor element includes a low conduction loss semiconductor element having a conduction loss which is smaller than a conduction loss of the first semiconductor element.
A semiconductor device comprising:
- a bridge circuit in which a plurality of switching arm sections having series-connected first semiconductor elements and second semiconductor elements are connected in parallel,
- wherein the first semiconductor element which constitutes an upper arm of the bridge circuit includes a low switching loss semiconductor element having a switching loss which is smaller than a switching loss of the second semiconductor element, and
- the second semiconductor element which constitutes a lower arm of the bridge circuit includes a low conduction loss semiconductor element having a conduction loss which is smaller than a conduction loss of the first semiconductor element.
A semiconductor device comprising:
- a bridge circuit in which switching arm sections having series-connected first semiconductor elements and second semiconductor elements are connected in parallel for three phases;
- and
- a control circuit making each of the first semiconductor elements and each of the second semiconductor elements of the bridge circuit perform a switching operation to drive an inductive load,
- wherein the first semiconductor element which constitutes an upper arm of the bridge circuit includes a low switching loss semiconductor element having a switching loss which is smaller than a switching loss of the second semiconductor element,
- the second semiconductor element which constitutes a lower arm of the bridge circuit includes a low conduction loss semiconductor element having a conduction loss which is smaller than a conduction loss of the first semiconductor element, and
- the control circuit drives an inductive load, by a two-phase modulation system of periodically fixing each phase voltage by controlling one of the upper arm and the lower arm to an ON state and the other to an OFF state in turn at intervals of 2π/3 at each phase voltage of three phase voltages to be applied to the inductive load.
A semiconductor device having:
- a third semiconductor element and a fourth semiconductor element connected in series,
- wherein the third semiconductor element includes a wide bandgap diode of a switching loss which is smaller than a switching loss of an insulated gate bipolar transistor, and
- the fourth semiconductor element includes a low conduction loss semiconductor element having a conduction loss which is smaller than a conduction loss of a MOSFET.
Dependencies are inferred from the claim text.