ELECTRIC POWER CONVERTING SYSTEM, AND MOTOR CONTROL METHOD

WIPO Patent Application WO/2020/044791

A1

This electric power converting system is provided with a power source device 1 for supplying electric power to a motor electric power converting device 2 which supplies electric power to a motor 3, wherein: the motor electric power converting device 2 includes an inverse converter 7 for converting the electric power, a control circuit 8 for controlling the inverse converter 7, and current detectors 59, 60 for detecting currents flowing through the inverse converter 7; the power source device 1 includes an accumulating device 6 for accumulating electric power in accordance with a voltage, a step up/step down power source circuit 5 for changing the voltage of the accumulating device 6 on the basis of a voltage command, and a voltage command calculating circuit 15 for calculating the energy accumulated in the accumulating device 6 and outputting the same as the voltage command to the step up/step down power source circuit 5; and the energy accumulated in the accumulating device 6 is calculated on the basis of powered running energy or regenerative energy of the motor 3, calculated using information from an encoder 10 with which the motor 3 is provided, and electric current values detected by the current detectors 59, 60. In this way, control shifts accompanying changes in characteristics due to degradation over time in the motor load, for example, can be suppressed.

TAKADA HIDETO (JP)
SUGIURA MASAKI (JP)
ISHIGAKI TAKUYA (JP)
KOBAYASHI SUMIO (JP)

PCT/JP2019/026632

March 05, 2020

July 04, 2019

Click for automatic bibliography generation  

HITACHI INDUSTRY EQUIPMENT SYSTEMS CO LTD (JP)

H02P21/36; H02M7/12; H02P25/028; H02P27/06; H02P23/06

JP2011200048A	2011-10-06
JP2015006021A	2015-01-08
JP2013211957A	2013-10-10

KAICHI IP (JP)

View/Download PDF      PDF Help

Previous Patent: AUTOMATIC ANALYSIS DEVICE

Next Patent: BATTERY PACK ARRANGEMENT STRUCTURE