![TECO-Westinghouse A510 Скачать руководство пользователя страница 312](http://html.mh-extra.com/html/teco-westinghouse/a510/a510_instruction-manual_1072531312.webp)
4-237
When 11-40=1:
OV prevention Mode 1
1) DC voltage filter is used to provide a stable reference value for determining the change in DC voltage change
during regenerative operation.
- Adjust the DC voltage filtering increase rate parameter 11-33 (DC Voltage Filter Rise Amount). When the DC
voltage exceeds 11-33 +11-35 (DC Voltage Filter Deadband Level), the output of the filter will increase.
- Adjust the DC voltage filtering decrease rate parameter 11-34 (DC Voltage Filter Fall Amount). When the DC
voltage exceeds 11-33 +11-35 (DC Voltage Filter Deadband Level), the output of the filter will decrease.
- Monitor the DC voltage filter output by 12-20 (DC voltage filter value).
- Set the DC voltage filter decrease rate (11-34) to a greater value than the value of the DC voltage filtering
increase rate (11-33).
2) When the inverter is operation at a fixed output frequency, the OVP function will monitor the DC-bus voltage to
detect regenerative operation.
In case of a regenerative condition the inverter calculates the delta DC bus voltage value and multiplies the value
with parameter 11-36, the result is added to the frequency reference accelerating the motor to prevent on an
overvoltage condition.
When the regenerative energy decreases, the inverter output frequency will return to the actual frequency
reference. Deceleration rate is based on the DC voltage, as shown in Figure 4.4.92.
OVP
Deceleration
Time
00-24
(Tdec 4)
00-22
(Tdec 3)
700V
750V
OVP
Deceleration
Start (11-38)
OVP
Deceleration
Stop (11-39)
DC bus
voltage
Figure 4.4.92 OVP deceleration time
3) When the inverter is stopped, the deceleration rate can be set with parameter 00-15 (Tdec1). In case the DC
voltage is too high, the inverter will decelerate based on the OVP deceleration time as shown in Figure 4.4.92.
- Set DC-bus voltage in parameter 11-38 (start voltage of OVP deceleration) and set OVP deceleration rate in
00-22 (Tdec3).
- When the DC voltage reaches this level, it is necessary to decelerate rapidly in order to prevent the delta DC
voltage of becoming too large.
Содержание A510
Страница 25: ...3 11 Step 3 Make wire connections and place cover back Step 4 Fasten screw ...
Страница 38: ...3 24 690V 100 150HP 460V 125HP Power supply 690V 100 150HP M10 Terminal screw size T M10 M10 ...
Страница 45: ...3 31 3 690V 175HP 270HP ...
Страница 160: ...4 85 Frequency Reference Output Frequency 100 00 12 00 13 100 Figure 4 4 6 Frequency reference upper and lower limits ...