Renesas Electronics Corporation

Yoshitaro Kondo

Yusuke Sugawara

Masatoshi Maeda

Yasuhiro Shirai

Toshiya Nozawa

Reiji Yamasaki

Yasuo Usuda

Masaki Hogari

Shoichi Kamimura

A calculation apparatusincludes an encoderconfigured to detect rising edges of PWM signals having at least three or more phases in each of the phases, and a registerconfigured to store, at a timing after the PWM signals having the respective phases rise and after AD conversion of a current value of a drive signal of a motor obtained by the PWM signals, a difference value between the AD-converted current value and a previous AD-converted current value for each phase.

Calculation apparatus and processing apparatus

The present invention provides a motor driving method, a battery pack, and a semiconductor device capable of variable-controlling a bus voltage from a battery pack. A battery pack outputting a bus voltage to a positive voltage node using a negative voltage node as a reference, an inverter unit converting the bus voltage to AC voltage by switching according to a PWM signal and driving a motor, and a motor control unit generating the PWM signal are used. The motor control unit outputs a voltage instruction signal for instructing the bus voltage toward the battery pack. The battery pack variable-controls the number of cells coupled in parallel between the positive voltage node and the negative voltage node so as to obtain the bus voltage according to the voltage instruction signal.

Motor driving method, battery pack and semiconductor device

Erroneous mounting of a semiconductor power module can be more easily detected. A semiconductor power module () according to the present invention includes: a status signal generation unit () configured to detect a status in the semiconductor power module () and generate and output a status signal indicating the detected status; an identification information storage unit () configured to preliminarily store identification information for identifying the semiconductor power module () and output an identification signal indicating the identification information; and a switching unit () configured to select one of the status signal output from the status signal generation unit () and the identification signal output from the identification information storage unit () and output the selected signal to an outside of the semiconductor power module ().

Semiconductor power module and drive system for electric motor

Growing community of inventors

Tokyo, Japan

Yoshitaro Kondo