Voltage detector
AssigneeToyota Jidosha Kabushiki Kaisha
InventorMasaru Nagao
Life of this patent
Estimating the term…
Abstract
A voltage detector includes a radiator plate which is connected to the collector of an IGBT, a detection lead frame which forms a capacitor along with the radiator plate, and a collector voltage detection circuit which detects the collector voltage of the IGBT on the basis of the amount of changes in electric charges accumulated in the capacitor. With this voltage detector, the collector voltage of the IGBT can be detected without causing an increase in the size of the system even under a high-voltage condition.
Claims3
A voltage detector for detecting a voltage between a first terminal and a second terminal of a power semiconductor device, the voltage detector comprising:
- an electrode plate which is connected to the first terminal of the power semiconductor device;
- a detection electrode which is arranged in the vicinity of the electrode plate so as to form a first capacitor along with the electrode plate;
- and
- a voltage detection circuit which detects a voltage between the first terminal and the second terminal of the power semiconductor device on the basis of changes in electric charges accumulated in the first capacitor.
Dependencies are inferred from the claim text.