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Title:
電力変換システムおよびそれによるモータ制御方法
Document Type and Number:
Japanese Patent JP7406379
Kind Code:
B2
Abstract:
A power conversion system 200 includes a power conversion device 2 configured to supply electric power to a motor 3 and a power supply device 1 configured to supply electric power to the power conversion device 2. The power conversion device 2 includes a reverse converter 7 configured to convert the electric power, a control circuit 8 configured to control the reverse converter 7, and a current detector configured to detect a current flowing through the reverse converter 7. The power supply device 1 includes a storage device 6 configured to store electric power in accordance with a voltage, a step-up/down power supply circuit 5 configured to change the voltage of the storage device 6 based on a voltage command, and a voltage command computing circuit 15 configured to compute the energy stored in the storage device 6 and output it as the voltage command to the step-up/down power supply circuit 5. The control circuit 8 calculates powered drive energy of the motor 3 by using information from the motor 3 and a current value detected by the current detector. The voltage command computing circuit 15 computes the energy stored in the storage device 6 based on the powered drive energy calculated by the control circuit 8. When it is determined that the characteristics of the motor 3 are restricted, the voltage command computing circuit 15 temporarily changes the voltage command to improve the motor characteristics.

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Inventors:
Yusuke Uei
Takuya Ishigaki
Hideto Takada
Yutaka Matsumoto
Masaki Sugiura
Application Number:
JP2020001962A
Publication Date:
December 27, 2023
Filing Date:
January 09, 2020
Export Citation:
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Assignee:
Hitachi Industrial Equipment Systems Co., Ltd.
International Classes:
H02P27/06; H02M7/48
Domestic Patent References:
JP2003015254A1
JP2011200048A
JP2015006021A
JP2006194133A
JP2013211957A
Attorney, Agent or Firm:
Patent Attorney Tsutsui International Patent Office



 
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