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1. (WO2018043480) LOAD DRIVING CIRCUIT, LOAD DRIVING SYSTEM, AND LOAD DRIVING METHOD

Pub. No.:    WO/2018/043480    International Application No.:    PCT/JP2017/030915
Publication Date: Fri Mar 09 00:59:59 CET 2018 International Filing Date: Wed Aug 30 01:59:59 CEST 2017
IPC: H02M 7/48
H02P 27/06
Applicants: UNIVERSITY OF TSUKUBA
国立大学法人筑波大学
Inventors: SENANAYAKE Thilak Ananda
セナナヤケ ティラク アナンダ
TADANO Hiroshi
只野 博
IIJIMA Ryuji
飯嶋 竜司
Title: LOAD DRIVING CIRCUIT, LOAD DRIVING SYSTEM, AND LOAD DRIVING METHOD
Abstract:
The present invention provides a load driving circuit which is provided between a direct current voltage source and a rotating load, and which is provided with an impedance source and an inverter, wherein: the impedance source has a first mode comprising a boosting period in which a control cycle of the rotating load boosts the power source voltage of the direct current voltage source, and an application period in which a first direct current voltage obtained by boosting is applied to the inverter, and a second mode in which, concurrent with the boosting of the power source voltage of the direct current voltage source during the control cycle of the rotating load, a second direct current voltage obtained by boosting is applied to the inverter, and the impedance source operates in either the first mode or the second mode in accordance with an index value indicating a counter-electromotive force generated in the rotating load; and during the control cycle in the first mode the inverter performs PWM control of the rotating load in the application period, and during the control cycle in the second mode the inverter controls the rotating load in the control cycle using a single pulse having a prescribed width.