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Electric power conversion system

專利號(hào)
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

? ? 2 2 ) × 360 ? ° = θ sft ( 1 )

The CNV controller 13 shifts the phase of the PWM signal PWM2 by inserting an auxiliary carrier of the phase shift amount θsft obtained through the mathematical expression (1) into the carrier wave of the PWM signal PWM2, thus bringing the rising edge of the PWM signal PWM2 into coincidence with the falling edge of the PWM signal PWM1.

Phase Shift by Controller—Overlap Phase Shift

Next, an overlap phase shift will be described. In this phase shift, at the time of coupling the PWM signals PWM1, PWM2, the phase of at least one of the PWM signals PWM1, PWM2 is shifted by raising the PWM signal PWM2 before the PWM signal PWM1 falls, that is, advancing the rising edge (rise) of the PWM signal PWM2 with respect to the falling edge (fall) of the PWM signal PWM1 such that the on periods of the PWM signals PWM1, PWM2 partially overlap with each other.

權(quán)利要求

1
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