Hitachi's WJ200 AC drives are capable of 200% torque across the speed range
Hitachi America, Industrial Components & Equipment Division, has introduced two 100 V Class models in the WJ200 series of inverters. The models are designed to be rated at ½ hp and 1 hp, 100-120 VAC, single-phase input, and 200-240 VAC, 3-phase output. The WJ200 is a sensorless vector (SLV) drive that is built to be capable of 200% torque across the speed range.
With its Easy Sequence (EzSQ) logic controller function, programs up to 1024 lines can be created on a PC using a structured language editing tool. These programs are engineered to be transferred to the WJ200 to control its operation and allow control schemes to be created without the use of external controllers.
According to the company, simple position control applications are also possible with the WJ200 utilizing the integrated pulse input. Together with EzSQ, motion profiles can be developed. The WJ200 is designed to have the capability to drive both induction motors and permanent magnet (PM) motors.
An EzCOM peer-to-peer communications function is standard and is engineered to allow multiple WJ200s to share data. One drive is designated as the “administrator,” and is built to control the network. Other drives on the network can be master or slave, with masters made to write data to any designated slave(s). Master/slave roles are designed to be rotated under the control of the administrator automatically. Up to eight masters can reside on the network, and up to 32 drives (up to 247 drives, if external signal repeaters are used). The administrator can be master or slave also. EzCOM is built to allow for creation of coordinated systems without additional external hardware or programming.
Other standard features include a safe-stop function (meets ISO/IEC standards), password protection of parameters, real-time clock, standard Modbus/RTU RS-485 serial port, micro surge voltage suppression and dynamic braking circuit. The WJ200 also is RoHS compliant.