The Altivar 31 drive is a popular frequency inverter created and designed for a single phase motors. This particular VFD (Variable Frequency Drive) is very robust, compact in size and is user friendly. The Altivar AT31 VFD series is suitable for use for motors that have a rating between 0.18 kW and 4 kW, depending on the voltage.

The Altivar 31 variable frequency drive incorporates functions that are suitable for the most common applications.
• Material handling, such as small conveyors and hoists.
• Packing and packaging machines.
• Specialist machines such as mixers, kneaders and textile machines.
• Pumps, compressor machines and fans.

• This VFD drive communicates on Modbus and CANopen industrial buses. These two different protocols are integrated as a standard into the drive.
• The drive is also supplied with an external heatsink.
• Multiple units can be installed side by side to save space and can also be easily customised.
• Features six logic inputs, three analogue inputs, one logic/analogue output and two relay outputs.
• There are a few options and accessories that can be used with the Altivar 31 drive, things such as braking resistors, line chokes, EMC radio interface input filters and output filters, plates for mounting, UL type 1 conformity kit and an adapter plate for replacing an Altivar 28 drive.
• High levels of torque at low speeds via sensorless Flux Vector control.
• A totally enclosed drive with an IP55 protection rating.
• Fully equipped with a Telemecanique Vario switch disconnector, speed reference potentiometer and Run/Stop switch.
• Operation up to 50°C without derating.
• This range allows for full customisation of the human-machine interface of an enclosure.

• Motor and drive protection
• Linear, S, U and customised acceleration and deceleration ramps
• + and – speed as well as 16 pre-set speeds
• PI references and regulator
• Two and three wire control
• Brake sequence
• Automatic catching a spinning load with handy speed detection and an automatic restart
• Fault configuration and stop type configuration as well as saving the configuration in drive
• Several functions can be assigned to one logic input

The 10 VDC power supply and the analogue input of the Altivar 31 inverter drive can operate with any potentiometer ranging from 1k to 10k ohms.

The ATV31C037M2ZH28 Inverter Drive by Schneider Electrics is a single phase variable speed asynchronous motor drive. It has a power rating of 0.37 kW and a supply voltage of 230 V ac. This Variable Frequency Drive dimensions are - length 281mm, 258mm width and an overall depth of 320mm.