How can I reduce the RPM of a 3-phase motor
There are several ways of decreasing the speed of a three-phase motor: variable frequency drive, voltage regulator, gear reducer, among others. A VFD can accurately control motor speed with high precision by simply changing the input power frequency and is, thus, one of the most widely used methods for performing stepless speed control. Voltage regulator […]
What are the starting methods of three-phase induction motors
The following are the various three-phase induction motor starting methods: Direct start; Star-delta start; Autotransformer start; Soft starter; And Variable Frequency Drive (VFD) control. A direct start technique is simple but it causes a high starting current; thus applicable only to small motors. Star-delta start connects the motor initially in star to minimize the currents […]