Power conversion apparatus
AssigneesKabushiki Kaisha Toshiba, Toshiba Infrastructure Systems & Solutions Corporation
InventorsTakashi TAKAGI, Keita NAKANISHI
Life of this patent
Estimating the term…
Abstract
A power conversion apparatus includes a power conversion circuit including a semiconductor element in each of upper and lower arms between DC links, and being electrically connected to an AC load at an AC end. A voltage detector detects a voltage between the DC links. A current detector detects a current flowing in the AC end. A control unit generates a gate command based on a voltage value obtained by the voltage detector and a current value obtained by the current detector. A gate driver drives the semiconductor element based on the gate command, includes a gate current detector and a circuit to determine a drive state of the semiconductor element from the gate current, and outputs a value corresponding to the drive state to the control unit.
Claims6
A power conversion apparatus comprising:
- a power conversion circuit including a semiconductor element arranged in each of an upper arm and a lower arm between DC links, the power conversion circuit being electrically connected to an AC load at an AC end between the upper arm and the lower arm;
- a voltage detector configured to detect a voltage between the DC links;
- a current detector configured to detect a current flowing in the AC end;
- a control unit configured to generate a gate command for instructing operation of the semiconductor element based on a voltage value obtained by the voltage detector and a current value obtained by the current detector;
- and
- a gate driver configured to drive the semiconductor element based on the gate command, the gate driver including a gate current detector configured to detect a gate current of the semiconductor element and a circuit configured to determine a drive state of the semiconductor element from the gate current, and outputting a value corresponding to the drive state to the control unit.
Dependencies are inferred from the claim text.