User Manual of EM760 High-Performance Inverter The specific description of this group of parameters is as follows: “when the actual frequency (estimate frequency in SVC and PG card feedback frequency in FVC) is less than or equal to the set value ofF13.12, the output torque is the ‘set torque + F13.11 static friction torque compensation’; and when the actual frequency is greater than the set value ofF13.12, the output torque is ‘set torque + F13.13 dynamic friction torque compensation’”. The larger the compensation value, the stronger the compensation force will be. The compensation percentage is equal to the torque setting percentage. 6.4 Start/stop method 6.4.1 Start-up method F04.00=0:
direct start The inverter is started at the starting frequency, following the DC braking (not suitable when F04.04=0) and pre-excitation (not suitable when F04.07=0). The starting frequency will change to the set frequency after the holding time. F04.00=1: start with speed tracking The inverter is smoothly started from the current rotation frequency of the motor, following the speed tracking (size and direction). In order to ensure the motor torque during the start, please set the appropriate starting frequency. To fully establish the magnetic flux during the motor start, the starting frequency should be maintained for sometime.
The starting frequency F04.01 is not limited by the lower frequency limit. Before the inverter is started, the motor may be in the status of low-speed running or reverse rotation. If the inverter is started immediately, it maybe subject to overcurrent protection. In order to avoid such protections, it is necessary to perform DC braking to stop the motor and then make the motor run in the set direction to the set frequency before the inverter is started. When F04.03 is set to different values, DC braking torques can be enabled. F04.04 is used to set the time to enable DC braking. The inverter will start running once the set time is up. IfF04.04=0.00, DC braking is invalid during start.
111 Function code Function codename Parameter description Unit Default setting Attribute F04.00 Start-up method 0: direct start 1: start of speed tracking 0 〇 Function code Function codename Parameter description Unit Default setting Attribute F04.01 Start frequency 0.00~50.00 Hz 0.00 〇 F04.02 Start frequency hold time 0.00-60.00, 0.00 is invalid s 0.00 〇 Function code Function codename Parameter description Unit Default setting Attribute F04.03 Starting current ofDC braking 0.0 to 100.0 (100.0 = rated current ofmotor) % 50.0 〇 F04.04 Starting time of DC braking 0.00~30.00 s 0.00 〇