PATENT CLAIM ANALYSIS

Application Number: 16319851
Application Type: Utility
Filing Date: 2019-01
Publication Date: 2019-08
Patent Classification: ["363", "021010"]

Abstract:
Each DC/DC converter includes a transformer, first and second switching circuits each formed of a plurality of legs having a plurality of semiconductor switching elements, and capacitors. When detecting a malfunction in semiconductor switching elements, a control circuit halts a normal operation mode and controls the first switching circuit by a protection mode for turning OFF all the semiconductor switching elements, and controls the second switching circuit by a bypass mode for bypassing the capacitor by turning ON the semiconductor switching elements in a discharge leg and causing a short circuit between the secondary side terminals, after controlling the second switching circuit by a discharge mode for discharging the capacitor by turning ON the semiconductor switching element in a discharge leg.

Claim (Index 1):
A power conversion device including a plurality of DC/DC converters, primary side terminals of which are connected in parallel and secondary side terminals of which are connected in series, the DC/DC converters each comprising:\n a transformer; a first switching circuit formed of a bridge circuit including a plurality of legs having a plurality of semiconductor switching elements to which antiparallel diodes are respectively connected, the first switching circuit being connected between the primary side terminals and a primary winding of the transformer so as to perform DC/AC power conversion; a second switching circuit formed of a bridge circuit including a plurality of legs having a plurality of semiconductor switching elements to which antiparallel diodes are respectively connected, the second switching circuit being connected between the secondary side terminals and a secondary winding of the transformer so as to perform DC/AC power conversion; a capacitor connected in parallel to the secondary side terminals; and a control circuit for controlling the first switching circuit and the second switching circuit, wherein a gate drive circuit of at least one of the semiconductor switching elements in each of the legs of the first switching circuit and the second switching circuit, includes a malfunction detection unit for detecting a malfunction in the semiconductor switching element, the control circuit is provided with a normal operation mode, a protection mode for turning OFF all the semiconductor switching elements in the first switching circuit, a discharge mode for discharging the capacitor by turning ON the semiconductor switching elements in a predetermined leg in the second switching circuit, and a bypass mode for bypassing the capacitor by causing a short circuit between the secondary side terminals, and in each of the DC/DC converters, when the malfunction detection unit detects the malfunction in the semiconductor switching element, the control circuit halts the normal operation mode, controls the first switching circuit by the protection mode, and controls the second switching circuit by the discharge mode after controlling the second switching circuit by the bypass mode.

Metadata:
- Claim Count in Document: 26.0
- Percentile: 99.0
- Lexical Diversity: 2.28571
- Patent Class: 363.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['16317340', '15556187', '15561660', '14603820', '15467738']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7806202770359875
- 35 USC 102 Novelty (BERT): 0.5840017997418739
- Combined Prediction Score: 0.7609584293065761
- Mean Citation Score: 282.8595279999999
- Max Citation Score: 469.7612
- Similarity Product: 460.9654918777704

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 0
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test