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Motor brake and stop operation
4.10.2 DC injection brake of IPM motor control (Pr.10, Pr.11)
<IPM >
(1) Coasting frequency setting (Pr.10)
When frequency at which coasting starts is set in Pr.10, output is shutoff when this frequency is reached during
deceleration and motor starts coasting. (This function is valid when Pr. 11 = "0s")
When Pr.11≠"0," Pr.10 is always set to 0Hz.
(2) Operation time setting (Pr.11)
In Pr. 11, set the time of the DC injection brake.
When Pr. 11 = "0", the DC injection brake is disabled. (At a stop, the motor coasts.)
When the motor does not stop due to large load moment (J), increasing the setting produces an effect.
CAUTION
As stop holding torque is not produced, install a mechanical brake.
♦ Parameters referred to ♦
Pr. 13 Starting frequency Refer to page 113
Pr. 71 Applied motor Refer to page 122
Pr. 178 to Pr. 189 (Input terminal function selection) Refer to page 133
At a motor stop, DC injection brake operates to apply braking torque to the motor.
Parameter
Number
Name Initial Value Setting Range Description
10
DC injection brake
operation frequency
3Hz
0 to 120Hz Set the frequency at which the motor coasts.
9999
Operate when the output frequency becomes
less than or equal to Pr. 13 Starting frequency.
11
DC injection brake
operation time
0.5s
0 DC injection brake disabled
0.1 to 10s Set the operation time of the DC injection brake.
CAUTION
As stop holding torque is not produced, install a mechanical brake.
An IPM motor is a motor with interior permanent magnets. High voltage is generated at motor terminals while
the motor is running. Do not touch motor terminals and other parts until the motor stops to prevent an electric
shock.
♦Parameters Referred to♦
Pr. 13 Starting frequency Refer to page 113
Pr. 71 Applied motor Refer to page 122
Pr. 178 to Pr. 189 (Input terminal function selection) Refer to page 133
IPM motor control Refer to page 77
IPM
IPM
IPM
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