User Manual EM303B General Purpose Inverter frequency 0, the parameters of speed PID are P1, Ti1 and Td1, and above switching frequency 1, the parameters of speed PID are P2, Ti2 and Td1. If switching frequency 1( F5-06) ＞ switching frequency 0 (F5-05), then the process is linear transition process from switching frequency 0 to switching frequency 1, as shown in Figure 7-17. 1. Be careful to edit the parameters of F5-00 ～ F5-06. 2.When setting switching frequency, switching frequency 0(F5-05)≤switching frequency 1(F5-06). Torque control (SVC1) EM303B could conduct torque control in SVC1.
When EM303B runs in SVC1 mode, torque control function refers to the occasions when the excitation current of motor is in current closed-loop, the actual motor speed can be estimated in real time through the internal motor magnetic flux and the speed estimation function of inverter, thus motor torque current can be actively controlled. Furthermore, the output torque of output motor can be controlled. When EM303B runs in SVC1, the maximum output frequency is limited by torque control upper limit frequency (F5-14). When the setting torque of inverter is bigger than the load torque, the output frequency rises.
When the output frequency reaches the upper limit frequency of torque control, inverter always runs as per upper limit frequency, and when the setting torque of inverter is less than the load torque, the output frequency drops. F5-07 Time taken for torque current to rise from 0 up to rated torque current. F5-08 Time taken for torque current to drop from rated torque current down to 0. F5-09 and F5-10 are for setting the current limit condition. If the output current of inverter ＞ the setting values of F5-09 and F5-10, current limit is enabled, thus the output current can be controlled within current limit.
★ The parameters refer to the ratio of the output current (at current limit) to the rated output current of inverter. ★ Customer can setthe current limit based on actual needs to protect motor or meet the working requirements. F5-09 and F5-10 limit the torque limiting Figure 7-18 Current Limit of Power /Braking Torque 117 No. Function Range Unit Default Type F5-07 Torque Current Acceleration Time 0.000～30.000 S 0.040 ● F5-08 Torque Current Deceleration Time 0.000～30.000 S 0.040 ● No. Function Range Unit Default Type F5-09 Power Torque Current Limit 80.00～250.00 % 165.00 ● F5-10 Brake Torque Current Limit 80.00～250.00 % 165.00 ●