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17/28 BCN-C22005-675
1.9 DC injection brake of the PM sensorless vector control
DC injection brake operation frequency will be fixed to 0 Hz at the time of PM sensorless vector control (low-speed
range high-torque mode disabled).
<When the low-speed range high-torque characteristic is disabled (Pr.788 = "0")>
1.10 PM sensorless vector control specification
REMARKS
The X13 signal is disabled during PM sensorless vector control.
Pr.12 DC injection brake operation voltage is invalid during PM sensorless vector control.
Item Specification
Control method
Sensorless vector control
Low-speed range: Control method in a low-speed range can be selected by parameter (high frequency
superposition control (initial setting) / current synchronization operation)
Starting torque
High frequency
superposition control
150% (Used in combination with MM-CF)
Current synchronization
operation
50%
Speed control
range
High frequency
superposition control
1:1000 (Use a one rank higher inverter for the ratio of 1:1000)
Current synchronization
operation
1:10
Zero speed
High frequency
superposition control
Possible (Use a one rank higher inverter for zero-speed 200%)
Current synchronization
operation
Not available
Carrier frequency
High frequency
superposition control
6kHz (Pr.72 = "0 to 9"), 10kHz (Pr.72 = "10 to 13"), 14kHz (Pr.72 = "14, 15")
(6kHz in a low-speed range of 10kHz or higher. 2kHz is not selectable.)
Current synchronization
operation
2kHz (Pr.72 = "0 to 5"), 6kHz (Pr.72 = "6 to 9"), 10kHz (Pr.72 = "10 to 13"), 14kHz
(Pr.72 = "14, 15")
(6kHz in a low-speed range of 10kHz or higher.)
Position control
High frequency
superposition control
Possible
Current synchronization
operation
Not available
Offline auto tuning
for an IPM motor
Possible
Applicable motor
Mitsubishi MM-CF series IPM motors (3.5 to 7.0kW)
IPM motors other than MM-CF (tuning required) (no capacity limit)
Pr. 11 Operation time
DC injection brake
is exercised at 0Hz.
Time
Time
DC injection
brake
DC injection
brake
Operation example when DC injection
brake is exercised (Pr. 11 0)
Motor coasting
Time
Time
Output
frequency
(Hz)
Output
frequency
(Hz)
Operation example when DC injection
brake is not exercised (Pr. 11 = 0)
Pr. 10
Coasting frequency time
bcnc22005635.fm 17 ページ ２０１４年１２月１１日 木曜日 午後５時５９分