Title:
SINUSOIDAL PWM CONTROL TRANSISTOR INVERTER
Document Type and Number:
Japanese Patent JPS60156280
Kind Code:
A
Abstract:
PURPOSE:To alleviate power loss by a main circuit transistor and its base drive circuit by interrupting the ON, OFF commands of the main circuit transistor when anti-parallel connection diodes are conducted. CONSTITUTION:A current command is converted by a transistor circuit 17 to a rectangular wave corresponding to positive and negative polarities provided with a small time lag at the rise. A current command and a current feedback signal are compared, and the output obtained by passing a current regulator is compared by a comparator 2 with a carrier triangular wave from an oscillator 7. The output of the comparator 2 is applied to an AND gate 18, and through a code converter 8 to an AND gate 18, and AND-calculated with the rectangular wave from the selector 17. The outputs of the gates 18, 19 are applied to base drive circuits 9, 10, and upper and lower transistors 3, 4 are turned ON or OFF.
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Inventors:
YOSHIDA TAKUMI
TSUDA MASANORI
TSUDA MASANORI
Application Number:
JP1059784A
Publication Date:
August 16, 1985
Filing Date:
January 23, 1984
Export Citation:
Assignee:
SHINKO ELECTRIC CO LTD
International Classes:
H02M7/48; H02M7/5387; H02M7/5395; (IPC1-7): H02M7/5395
Domestic Patent References:
| JPS57180377A | 1982-11-06 |
Attorney, Agent or Firm:
Haruya Saito