What is the compressor blocking current?
When the compressor back pressure is too large, the motor will be running, the current value of the current is locked rotor current.
When the compressor back pressure is too large, the motor will be running, the current value of the current is locked rotor current.
[block rotor current] the compressor motor shaft fixed, do not make it turn, power, the current is the blocking current. Ordinary AC motors, including frequency modulation motors, are not allowed to stall. By the external characteristic curve of AC motor, when the AC motor is blocking, it will produce "overturn current" burning motor.[the application of locked rotor current] is generally applied to torque motors. It is a kind of special motor with soft mechanical characteristics and wide speed range. As the load increases, the speed of the motor decreases automatically, while the output torque increases and remains balanced with the load. The torque motor has high blocking moment and small blocking current, and can withstand the blocking operation for a certain period of time. Because the rotor loss, high resistance, the heat generated is also large, especially in the low speed operation and stalling is more serious, therefore, the motor in the axial or centrifugal fan end cover is provided with an independent (except for the output torque of 100 smaller frame size and below), for forced air cooling, torque motor with a control device with the SCR can speed regulator, speed range is 1:4, the speed change ratio of 10%. The characteristics of this kind of motor which is suitable for winding, unwinding, stall speed and other occasions and other purposes, is widely used in textile, wire and cable, metal processing, papermaking, rubber, plastics, printing machinery and other industrial fields.
