An inverter is more often used now for selecting the drive
frequency most adequate to an induction motor with a specific load. Frequency
adjustment has generally depended on manual control of variable resistor
— potentiometer — so far.
DC/Potentiometer Converter model CVR1 can easily automate this frequency
adjustment. DC/Potentiometer Converter receives standardized instrument
signals such as 4 to 20 mAdc and others to convert them into potentiometer
resistance value such as 0 to 135 ohms and 0 to 1k ohms. An inverter frequency
control system employing the DC/Potentiometer Converter CVR1 is illustrated
below:
DC/Potentiometer Converters CVR1 are used in certain cement companies for
controlling frequency of inverters which drive mixer motors and others. |
