
E6581381
Braking motor
When using a braking motor, if the braking circuit is directly connected to the inverters's output terminals, the brake cannot be released because of the lowered starting voltage. Therefore, when using a braking motor, connect the braking circuit to the inverter's power supply side, as shown in the figure below. Usually, braking motors produce larger noise in low speed ranges.
Note: In the case of the circuit shown on the below, assign the function of detecting | 1 |
to the RY and RC terminals. Make sure the parameter H is set to (factory default | |
setting). |
Measures to protect motors against surge voltages
In a system in which a
(1)Lower the inverter’s carrier frequency.
(2)Set the parameter H (Carrier frequency control mode selection) to or .
(3)Use a motor with high insulation strength.
(4)Insert an AC reactor or a surge voltage suppression filter between the inverter and the motor.
1.4.2Inverters
Protecting inverters from overcurrent
The inverter has an overcurrent protection function. The programmed current level is set to the inverter's maximum applicable motor. If the motor used has a small capacity, the overcurrent level and the electronic thermal protection must be readjusted. If adjustment is necessary, see 5.12, and make adjustments as directed.
Inverter capacity
Do not use a