Title:
APPARATUS FOR PROCESSING REGENERATIVE ENERGY OF AC MOTOR
Document Type and Number:
WIPO Patent Application WO/1983/004349
Kind Code:
A1
Abstract:
An apparatus for processing the regenerative energy of an AC motor comprises a regeneration-detecting logic circuit (7) outputting a regeneration detection signal when it detects that a semiconductor switch for an AC motor drive is not conductive and the direction of a current flowing through the AC motor is opposite to that when the AC motor is driven, and a regeneration drive circuit (9) driving a regenerative energy processing semiconductor switch in response to the regeneration detection signal. The regenerative energy processing semiconductor switch is conductive only when the AC motor is regenerating to return the regenerative energy to an AC power source, so that the power consumption of a resistor protecting the regenerative energy processing semiconductor switch can be reduced to enable a reduction in the size thereof.
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Inventors:
SAKAMOTO KEIJI (JP)
TOYOZAWA YUKIO (JP)
TOYOZAWA YUKIO (JP)
Application Number:
PCT/JP1983/000162
Publication Date:
December 08, 1983
Filing Date:
May 26, 1983
Export Citation:
Assignee:
FANUC LTD (JP)
International Classes:
H02M7/797; H02P3/18; H02P23/06; (IPC1-7): H02P3/18
Foreign References:
| JPS5879475A | 1983-05-13 | |||
| JPS5629479A | 1981-03-24 | |||
| JPS5594583A | 1980-07-18 | |||
| JPS5158625A | 1976-05-22 |
Other References:
See also references of EP 0111567A4
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