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1. (WO2018198191) POWER CONVERSION DEVICE AND POWER CONVERSION SYSTEM

Pub. No.:    WO/2018/198191    International Application No.:    PCT/JP2017/016356
Publication Date: Fri Nov 02 00:59:59 CET 2018 International Filing Date: Wed Apr 26 01:59:59 CEST 2017
IPC: H02M 7/48
Applicants: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
東芝三菱電機産業システム株式会社
Inventors: SUZUKI, Hiromitsu
鈴木 寛充
Title: POWER CONVERSION DEVICE AND POWER CONVERSION SYSTEM
Abstract:
Provided are a power conversion device and a power conversion system that ensure safety such that an emergency stop can be performed with certainty, and that are equipped with a malfunction monitoring function. The power conversion device comprises a control circuit unit that transmits a PWM signal to a main circuit unit, and is provided with an operation command signal for causing an electric motor to operate or stop and a first emergency stop command signal for performing an emergency stop. The control circuit unit controls a PWM signal generating circuit on the timing at which a PWM signal is output, and controls an operation monitoring test signal generation/monitoring circuit unit so that, when the operation command signal is in an operation state and the first emergency stop command signal is not in an emergency stop state, an on-delay 3 output signal is output at a prescribed time T3 and an L level, and while the on-delay 3 output signal is being output, a test pulse generation command signal is output to control the ON/OFF of the output of the PWM signal. The control circuit unit transmits a first answer signal as a response signal to an upper level monitoring device upon receiving the first emergency stop command signal or when a first test lock signal is output.