Due to certain load characteristics, equipment that is difficult to start due to high starting torque, such as extruders, cleaning machines, spin dryers, mixers, paint machines, blenders, large fans, pumps, and Roots blowers, have all started up smoothly. This is more effective than increasing the starting frequency. By using this method in conjunction with measures to reduce load from heavy to light, and by increasing the current protection to a higher value, almost all equipment can be started. Therefore, it is said that using a reduced base frequency to increase starting torque is a relatively effective and convenient method. Aviation Power
When applying this condition, the fundamental frequency does not necessarily have to drop all the way down to 30Hz at once. A reduction of 5Hz at a time can be implemented, with the frequency reaching the point where the system can be activated.
(3) The lower limit of the base frequency should not be below 30Hz. From the perspective of torque, the lower the lower limit, the greater the torque. However, one must also consider that rapid voltage rise and excessive dynamics can cause damage to the IGBT. The actual usage results show that this measure to increase torque can be safely and confidently employed within the range of 50Hz to 30Hz. 36V aviation power supply
(4) Some concerns have been raised, such as when the base frequency is reduced to 30Hz, the voltage reaches 380V. However, when normal operation may require up to 50Hz, will the output voltage jump to 380V, causing the motor to fail? In fact, such a phenomenon will not occur.
(5) Concerns have been raised regarding the voltage reaching 380V when the base frequency is lowered to 30Hz. Will the output frequency be able to reach the rated 50Hz when the normal operation requires a frequency of 50Hz? In fact, the output frequency can reach 50Hz. 400HZ power supply
