6-22
200-V Class, 0.4-kW Inverter Example
Power
supply inputs
Braking Resistor
Unit
Motor
output
Jumper wire
Control
circuit
terminals
Main circuit
terminals
H Speed Limit Function Settings
• This setting selects the speed limit function used when torque control is performed.
With
torque control, the motor sometimes rotates at high speed with no load or a light
load. The speed
limit function keeps the motor speed from exceeding the specified limit in these cases.
• If
the speed limit is exceeded during torque control operation, a suppressing torque (proportional to
the
divergence from the speed limit) is added to the torque reference. (The suppressing torque is ap
-
plied opposite to the motor rotation.)
• There are two ways to set the motor speed limit: a parameter setting or an analog input value.
D Speed Limit Selection
Parameter Display name Setting Units Default
Valid access levels
number
range setting
V/f
Control
V/f with
PG
Open Loop
Vector
Flux
Vector
d5-03 Speed Limit Sel 1 or 2 --- 1 Not applicable. Advanced
Note This parameter cannot be changed during operation.
Settings
Setting Function
1 The speed limit is set from one of the analog frequency reference terminals (13 or 14).
2 The speed limit is set to the value in parameter d5-04.
D Speed Limit Selection Settings
• Limit with Analog Input (d5-03 = 1)
Advanced Operation Chapter
6
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