Title:
VOLTAGE TYPE INVERTER
Document Type and Number:
Japanese Patent JPS6082066
Kind Code:
A
Abstract:
PURPOSE:To improve the waveform distortion of the output voltage of an inverter by outputting a pulse width modulation control signal corrected in the pulse width for opening and closing an electric valve. CONSTITUTION:A signal PWMU which presumes an ideal switching is compared with an actual voltage signal V14, an error is integrated by an integrator 170 of a voltage correcting circuit 17, and a comparator 173 switches a changeover switch 174 according to the positive or negative of the integrated value of the error. The PWMU and the actual voltage signal V14 are compared and integrated, and when the actual voltage signal V14 is narrower than the PWMU signal, the switch 174 is switched to a wide width signal V172 side to operate to increase the output voltage by an inverter bridge. In the reverse case, the switch 174 is switched to the narrow width signal V171 side, and inverter bridge is operated to reduce the output voltage, and the integrated value of the voltage is always controlled to be equal to the integrated value of the signal PWMU for operating the ideal switch.
Inventors:
OKATSUCHI CHIHIRO
Application Number:
JP18707183A
Publication Date:
May 10, 1985
Filing Date:
October 07, 1983
Export Citation:
Assignee:
TOSHIBA KK
International Classes:
H02M7/48; H02M7/537; H02M7/5387; (IPC1-7): H02M7/48
Domestic Patent References:
| JPS5064730A | 1975-06-02 |
Attorney, Agent or Firm:
Noriyuki Noriyuki (1 person outside)
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