UMV-4301 | LEROY SOMER Loop Speed Controllers

The UMV 4301 is an AC controller for supplying asynchronous motors and synchronous (brushless) motors. The UMV 4301 can therefore be configured in various operating modes, as follows :Open loop flux vector controlAs a result of its calculating power, the controller controls the magnetizing current and the active current for a standard asynchronous motor separately. The speed and position of the rotor are calculated to control the torque and speed of the motor. This open loop operating mode gives very high levels of performance and is thus suitable for the majority of applications. Closed loop flux vector controlThe use of the closed loop flux vector control mode on a standard asynchronous motor fitted with an incremental encoder for the position and exact speed of the rotor gives better control of the torque and speed of the motor over a wider speed range (including zero speed), with enhanced dynamic performance.Open loop operation with voltage/frequency (V/F) controlThe controller simultaneously controls the voltage and the frequency at the terminals of the asynchronous motor. This operating mode is used for particular applications for which open loop flux vector control does not provide the required performance levels (several motors supplied by a single controller, etc).