Abstract: A motor drive device comprising a converter for carrying out a power running operation for supplying power from a three-phase AC power supply to a three-phase AC motor and a power regenerative operation for returning energy generated by the three-phase AC motor to the three-phase AC power supply.

Abstract: Bank account transactions and fund investment are easily conducted by a customer through an investment-linked account opened with a bank, while using the bank as a sole contact point. An investment-linked account 110 includes a function to automatically transfer money exceeding an upper limit amount arbitrarily set by the customer or money reaching an accumulation target amount arbitrarily set by the customer, from the balance of the investment-linked account 110, to a fund 210 selected arbitrarily by the customer from funds offered by a fund management company 200. A system 1 includes customer information databases 331 and 332, which stores the information of bank transaction executed through the investment-linked account 110 and the information of fund transaction executed through the fund account 220 as customer information.