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AC drive has been designed for hydraulic applications
Parker Hannifin has developed a modular AC drive specifically for motor control in hydraulic applications. The AC20F drive, available in ratings from 1.5-180kW, can be used in variable-speed hydraulic pump systems, such as the company’s drive-controlled pump (DCP). It includes a sensorless vector mode for controlling induction motors.
The drive can monitor the condition of hydraulic power packs, detecting oil levels, temperatures and filter conditions automatically. If necessary, it can generate warnings or halt applications.
In DCP applications, the drive supports four operating modes. In flow control (Q) mode, it sets the correct pump speed based on a specified flow rate. In pressure (P) mode, it controls pressure based on a control signal and feedback from a closed-loop pressure transducer. PQ mode combines the first two options.
The drive also offers an electronic load compensated pump (eLCP) load-sensing mode, which combines the high dynamics of a throttle valve with the efficiency of a DCP.
Options include I/O cards, and an encoder feedback card that allows an incremental encoder to be connected for closed-loop vector control. Communications cards include CANopen, Profibus, ProfiNet, EtherCat and EtherNet/IP.
The Drive System Explorer (DSELite) configuration software is based on block programming and offers an intuitive interface. It allows users to configure and parameterise applications without having to navigate through complicated menus.
The new drive is available from Parker’s Industrial Systems Division Europe.
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