Title:
INVERTER OPERATING METHOD
Document Type and Number:
Japanese Patent JPH10146062
Kind Code:
A
Abstract:
To control generation of an over-current in the phase V when an inverter is started.
In the process to integrate the reference frequency command 10 with an integrator 11 and to produce a PWM signal with PWM signal generators 21a, 21b depending on such resulted integral calculation, an output of the integrator 11 is monitored with a starting phase detector 14 when the starting switch 13 turns ON, and a high level signal is outputted from the starting phase detector 14 when the phase of line voltage Vuv becomes 150deg. Moreover, an output of the latch circuit 23 is inverted to high level from low level and the switching elements 3a to 3d are caused to output the PWM signal from the AND circuits 22a, 20b to start the inverter circuit.
Inventors:
KANOUDA TAMAHIKO
SAKURAI YOSHIMI
KUBO KENJI
UMETSU HIDEYASU
KUNISADA HIDEAKI
SHIMADA KEIZO
NAKANE TAKAYASU
SAKURAI YOSHIMI
KUBO KENJI
UMETSU HIDEYASU
KUNISADA HIDEAKI
SHIMADA KEIZO
NAKANE TAKAYASU
Application Number:
JP29849196A
Publication Date:
May 29, 1998
Filing Date:
November 11, 1996
Export Citation:
Assignee:
HITACHI LTD
HITACHI ENG CO LTD
HITACHI ENG CO LTD
International Classes:
H02J9/06; H02M7/48; (IPC1-7): H02M7/48
Attorney, Agent or Firm:
Unuma Tatsuyuki
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