Title:
CHARGE AND DISCHARGE CONTROL DEVICE
Document Type and Number:
WIPO Patent Application WO/2002/093730
Kind Code:
A1
Abstract:
A charge and discharge control device, wherein S1 used as a switching element for pressure rising and S2 used as a switching element for pressure lowering are turned on and off alternately with a dead time provided therebetween irrespective of whether an electric motor load a powering or regenerating operation is performed, whereby a DC reactor current can be operated continuously at all times, and the discontinuous state of the DC reactor current need not be detected.
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Inventors:
NAGURA HIROKAZU (JP)
YAMATO IKUO (JP)
HOKARI SADAO (JP)
INABA HIROMI (JP)
YAMATO IKUO (JP)
HOKARI SADAO (JP)
INABA HIROMI (JP)
Application Number:
PCT/JP2001/003942
Publication Date:
November 21, 2002
Filing Date:
May 11, 2001
Export Citation:
Assignee:
HITACHI LTD (JP)
NAGURA HIROKAZU (JP)
YAMATO IKUO (JP)
HOKARI SADAO (JP)
INABA HIROMI (JP)
NAGURA HIROKAZU (JP)
YAMATO IKUO (JP)
HOKARI SADAO (JP)
INABA HIROMI (JP)
International Classes:
H02M7/48; B66B1/34; H02M1/36; H02M3/158; H02M5/458; H02P3/18; H02P27/08; H02J9/06; (IPC1-7): H02P7/63; B66B1/34; H02M7/48; H02P3/18
Foreign References:
| JPS61267675A | 1986-11-27 | |||
| JPH0340787A | 1991-02-21 | |||
| JPH06345350A | 1994-12-20 | |||
| JPS5917880A | 1984-01-30 |
Attorney, Agent or Firm:
Sakuta, Yasuo (Ltd. 5-1, Marunouchi 1-chome Chiyoda-ku Tokyo, JP)
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