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4-115
4-2 Function Mode
4
Func
tions
• If 0-Hz sensorless vector control cannot provide the desired characteristics, adjust the motor
parameters depending on the phenomena, as shown in the table below.
Note 1: Make sure that the carrier frequency (b083) is not lower than 2.1 kHz. If the carrier frequency is at 2.1 Hz
or lower, the Inverter does not operate normally.
Note 2: Set a torque limit value (b041 to b044), while keeping the value
α
, calculated with the following formula,
at 200% or lower. Otherwise, the motor may burn out.
α
= Torque limit set value × (Inverter capacity) / (Motor capacity)
(Example) If the Inverter capacity is 0.75 kW and the motor capacity is 0.4 kW, the torque limit set value for
α
=
200%, calculated with the above formula, is as follows: Torque limit set value (b041 to b044) =
α
×
(Motor capacity) / (Inverter capacity) = 200% × (0.4 kW)/(0.75 kW) = 106%
Operation
status
Phenomenon
Adjusting method
Adjustment item
Power
running
Speed change ratio is a
negative value.
Increase motor parameter R2 gradually (up to set
parameter × 1.2).
H021/H221/H031
Speed change ratio is a
positive value.
Reduce motor parameter R2 gradually (down to set
parameter × 0.8).
H021/H221/H031
Regeneration
Insufficient torque at low
frequency (several Hz)
Increase motor parameter R1 gradually (up to set
parameter × 1.2).
H020/H220/H030
Increase motor parameter Io gradually (up to set
parameter × 1.2).
H023/H223/H033
During
startup
Shock occurs during
startup.
Reduce motor parameter J from the set parameter.
H024/H224/H034
During
deceleration
Motor hunting
Reduce the speed response.
H005/H205
Reduce motor parameter J from the set parameter.
H024/H224/H034
Immediately
after
deceleration
Overcurrent or
overvoltage protection is
activated.
Reduce motor parameter Io gradually (down to set
parameter × 0.8).
H023/H223/H033
Set AVR selection A081 to "00" (always ON) or "01"
(always OFF).
A081
Low-
frequency
operation
Rotation is not constant.
Increase motor parameter J from the set parameter.
H024/H224/H034
Related functions
A001, A044/A244, F001, b040, b041 to b044, H002/H202, H003/H203,
H004/H204, H005/H205, H020/H220, H021/H221, H022/H222, H023/
H223, H024/H224, H050/H250, H051/H251, H052/H252, H060/H260,
H061/H261
Summary of Contents for 3G3RX Series
Page 1: ...Cat No I560 E1 03 USER S MANUAL SYSDRIVE RXSERIES High function General purpose Inverter ...
Page 2: ......
Page 17: ...Chapter 1 Overview 1 1 Functions 1 1 1 2 Appearance and Names of Parts 1 4 ...
Page 22: ......
Page 23: ...Chapter 2 Design 2 1 Installation 2 1 2 2 Wiring 2 6 ...
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Page 337: ...Chapter 6 Inspection and Maintenance 6 1 Inspection and Maintenance 6 1 ...
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Page 437: ...Index ...
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