B2: Magnetic Flux Compensation - YASKAWA L1000A Technical Manual

◆ b2: Magnetic Flux Compensation

b2-08: Magnetic Flux Compensation Value
■
Sets the magnetic flux compensation at start as a percentage of the no-load current value (E2-03). This function allows for
the development of more flux to facilitate starting machines that require high starting torque or motors with a large rotor
time constant.
No.
b2-08
When an Up/Down command is issued, the DC current level injected into the motor changes linearly from the level set to
b2-08 to the level set to E2-03 within the time set to b2-03.
Figure 5.1
The level of the DC current injected to the motor is limited to 80% of the drive rated current or to the motor rated current,
whichever value is smaller.
Note: 1. If b2-08 is set below 100%, it can take a relatively long time for flux to develop.
2. If b2-08 is set to 0%, the DC current level will be the DC Injection current set to S1-02.
3. As DC Injection can generate a fair amount of noise, b2-08 may need to be adjusted to keep noise levels acceptable.
◆ b4: Delay Timers
The timer function is independent of drive operation and can delay the switching of a digital output triggered by a digital
input signal and help eliminate chattering switch noise from sensors. An on-delay and off-delay can be set separately.
To enable the timer function, set a multi-function input to Timer input (H1- = 18) and set a multi-function output to
Timer output (H2- = 12). Only one timer can be used.
b4-01, b4-02: Timer Function On-Delay, Off-Delay Time
■
b4-01 sets the on-delay time for switching the timer output. b4-02 sets the off-delay time for switching the timer output.
No.
b4-01
b4-02
Timer Function Operation
■
The timer function switches on when the timer function input closes for longer than the value set to b4-01. The timer
function switches off when the timer function input is open for longer than the value set to b4-02.
the timer function operation:
Figure 5.2
Multi-function Contact
Input: Timer Function
Multi-function Contact
Output: Timer Function
YASKAWA ELECTRIC SIEP C710616 38F YASKAWA AC Drive - L1000A Technical Manual
Parameter Name
Magnetic Flux Compensation Value
Output Speed
b2-08
Magnetizing Current
Reference
S1-04
Figure 5.1 Magnetic Flux Compensation
Parameter Name
Timer Function On-Delay Time
Timer Function Off-Delay Time
ON
ON
b4-01 b4-02
Figure 5.2 Timer Operation
Setting Range
0 to 1000%
common_TMonly
E2-03
Time
Setting Range
0.0 to 3000.0 s
0.0 to 3000.0 s
ON
ON
b4-01 b4-02
5.2 b: Application
Default
0%
Default
0.0 s
0.0 s
Figure 5.2 illustrates
On (Closed)
Off (Open)
common_TMonly
On (Closed)
Off (Open)
169
5