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Electric power conversion system

專利號
US10097093B2
公開日期
2018-10-09
申請人
TOYOTA JIDOSHA KABUSHIKI KAISHA（JP Toyota-shi, Aichi-ken）
發(fā)明人
Shohei Sunahara; Hidetsugu Hamada; Akihiko Ide; Masatoshi Shinohara
IPC分類
H02J1/10; H02J3/38; H02M3/158
技術(shù)領(lǐng)域
pwm2,pwm,pwm1,cnv1,cnv2,shift,switching,phase,cnv,step
地域： Toyota-shi, Aichi-ken

摘要

An electric power conversion system includes: a first battery; a second battery; an electric power converter including a plurality of switching elements, and configured to bidirectionally step up or step down electric power between an output line and each the first and second batteries in accordance with PWM signals; and a controller configured to control first and second step-up and step-down circuits by generating first and second PWM signals. The first and second step-up and step-down circuits are established between each first and second batteries and the output line. The first and second PWM signals are signals for controlling step-up and step-down operation of each first and second step-up and step-down circuit. The controller is configured to, when coupling on-duty periods of both the first and second PWM signals with each other, execute an overlap phase shift that partially overlaps the on-duty periods of the first and second PWM signals.

說明書

The first battery B1 is connected between a connection point (node) 40 and the reference line 28. The connection point (node) 40 is provided between the second switching element S2 and the third switching element S3 from the high-voltage line 26 side. In addition, the second battery B2 is connected between a connection point 42 and a connection point 44. The connection point 42 is provided between the first switching element S1 and the second switching element S2 from the high-voltage line 26 side. The connection point 44 is provided between the third switching element S3 and the fourth switching element S4 from the high-voltage line 26 side.

The electric power converter 11 is able to switch connection of the first battery B1 and the second battery B2 to the rotary electric machine 20 (load) between series connection and parallel connection, as described above. In the parallel connection, as shown in FIG. 2A, a first step-up/step-down circuit CNV1 is established between the first battery B1 and the high-voltage line 26 (output line), and a second step-up/step-down circuit CNV2 is established between the second battery B2 and the high-voltage line 26.

權(quán)利要求

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