Patent ID: 11901839
Assignee: MITSUBISHI ELECTRIC CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 15:
16. A semiconductor device comprising:
a first circuit including semiconductor switching elements connected in parallel, each semiconductor switching element having a first electrode, a second electrode, and a third electrode and being configured to be controlled, according to a voltage between the first electrode and the third electrode, to attain conduction or non-conduction between the second electrode and the third electrode; and
a controlling circuitry connected to the first electrode of each semiconductor switching element and configured to control the voltage between the first electrode and the third electrode, wherein
the semiconductor device is configured to satisfy a first condition that an impedance Zg on a first path between the first electrodes of the respective semiconductor switching elements is higher, by at least a set value, than an impedance Zs on a third path making connection between the third electrodes of the respective semiconductor switching elements,
the first condition is satisfied on the basis of an impedance at a resonance frequency of a series resonance circuit including: an inductance component on a second path making connection between the second electrodes of the respective semiconductor switching elements; an inductance component and a resistance component on the first path; and a capacitance component of each semiconductor switching element,
the set value is indicated as Zg/Zs which is a multiplication value, for the impedance Zg on the first path, relative to the impedance Zs on the third path, and
the multiplication value Zg/Zs is set to 10.