Wide Constant Power Control Using Winding Selection
7.5.2 Automatic Winding Selection methods
7 -10
Set the host controller speed reference judgment level S
CHW
and the hysterisis level ∆S to the same values
as the Inverter speed detection signal level C1-21 (SD
LVL
) and the speed detection signal detection width
C1-22 (SD
HYS
).
Table 7.1 Winding Selection Conditions
Speed
Speed Reference
≧ S
CHW
−
∆
S
≦ S
CHW
−
∆
S
Speed ≧ S
CHW
−
∆
S (SDET
OFF)
High-speed winding selected Winding selection not performed
Speed ≦ S
CHW
−
∆
S (SDET ON)
Winding selection not performed Low-speed winding selected
(Stopped)
(FWD rotation)
Speed reference 0
Speed
S2000
S500
[CHWE]
[CHW]
OFF
ON
500 min
−1
2000 min
−1
[SDET]
nS
nS
M05 M03
OFF
ON
OFF
ON
OFF
ON
[FWD]
500 min
−1
S
CHW
0
Fig 7.9 Timing Chart
7
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