Title:
CONTROL METHOD AND EQUIPMENT FOR POWER CONVERTER UNIT
Document Type and Number:
Japanese Patent JP3286046
Kind Code:
B2
Abstract:
PURPOSE: To prevent the occurrence of heating due to switching loss, shortage of operating time, increase in ripple and others by reducing magnetic sound caused by higher harmonics.
CONSTITUTION: ON-time signal generating means 12 is provided, which is capable of generating a signal proportional to ON time within a period of carrier signal of a switching element 3 obtaining an output signal by inputting a voltage command signal and a carrier signal. Further provided are timing signal generating means 13 generating a timing signal for changing with time either ON timing or OFF timing of the switching element 3 for each of a plurality of periods of the carrier signal, and switching signal generating means 11 outputting the switching signal driving the switching element 3 in response to the ON time signal and timing signal.
Inventors:
Keita Hatanaka
Masato Koyama
Masato Koyama
Application Number:
JP31852293A
Publication Date:
May 27, 2002
Filing Date:
December 17, 1993
Export Citation:
Assignee:
Mitsubishi Electric Corporation
International Classes:
H02M3/155; H02M7/48; H02P27/08; (IPC1-7): H02M7/48; H02M3/155; H02P7/63
Domestic Patent References:
| JP4121065A | ||||
| JP360376A | ||||
| JP3218265A | ||||
| JP446568A |
Attorney, Agent or Firm:
Hiroaki Tazawa (1 person outside)