Mitsubishi Electric GM-J2 Series Instruction Manual page 9

■ Instructions for use
1. If the motor is used for a lift and high accuracy is needed in braking operation, adopt the DC power-off
(quick power-off) circuit.
2. The coasting time may slightly vary depending on the load specifications and braking torque.
3. Due to the brake structure, the lining may generate a sliding noise. This noise, however, will not
affect the performance of the motor, and will be reduced as the time elapses.
4. If the capacitor for power factor improvement is connected to the motor circuit, be sure to select the
respective power-off circuit.
For the inverter drive system, the capacitor for power factor improvement cannot be connected to the
motor circuit.
5. To adopt the inverter drive system or to control the input power, be sure to connect the brake to the
power supply unit side of the inverter.
(If the brake is connected to the output side of the inverter, the power supply unit may be damaged.)
For this type, the brake can be applied after turning off the inverter main circuit.
6. In the inverter drive mode, the noise may be rather loud even in the low-frequency area. This noise,
however, will not affect the functions of the motor.
7. To operate the motor at the frequency of 25 Hz or less in the inverter drive mode, the rated value should
be 1 hour or 25% ED.
8. In the inverter drive mode, the frequency for braking operation should be 60 Hz or less. (The braking
capacity is limited.)
9. In the inverter drive mode, if the wiring distance is too long between geared motor and the inverter, the
torque of the geared motor may be reduced due to cable voltage drop. In this case, select a cable size
so that the voltage drop can be 2% or less of the rated voltage.
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