Lenze 8200 Vector Inverter E82EV152 4C200
Lenze 8200 Vector E82EV152 4C200 Inverter :
E82EV152 4C200 Inverter is part of the Lenze 8200 range of variable speed drives. As a 1.5 kW, 7.0 A, 400/500V AC drive, the Lenze 8200 Vector E82EV152 4C200 Inverter is suitable for a wide variety of applications. We have refurbished inverter in our stock at Dhaka Bangladesh. We provide warranty on every inverter / motor drive.
- Inverter : 8200 vector
- Type: E82EV152 4C200
- ID no: 13142441
- Version: 4A37
- Prod no: 02251919
- Ser no: 0052
- Input : 3/PEAC 0-400/500V 5.5/4.4A 50/60Hz
- Output: 3/Pe Ac 0-400/500 3.9A / 3.1A 1.5Kw/2.0hp 0-650Hz
There are some types of load where the performance of a VVVF controller is not good enough for operating the induction motor. One such application area is where very fast speed response is needed, e.g. in position control systems and flying shears. Under such highly dynamic conditions, the operation of a VVVF controller will be underdamped or even unstable. Another area where a VVVF controller is not particularly suitable is in torque control applications, e.g. rewinders, torque boosters, etc. Also the standstill torque and low speed torque capabilities of a VVVF controller on an induction motor are not very good, making it unsuitable for use on hoists and elevators.
For high performance operation, closed loop torque control is required. This requires that the torque producing and magnetising components of stator current must be accurately and separately controlled as vectors, i.e. they are controlled in both magnitude and spatial position. The two components are kept in quadrature, i.e. 90O electrical apart. This class of induction motor controller is referred to as a Field Orientated Flux Vector Controller, or simply Vector Controller. This type of controller has very fast torque response, making it suitable for precision torque, speed and position control applications. The ability to get up to full pull-out torque of the motor at all speeds, including standstill, makes this controller suitable for cranes, hoists and elevators.
The vector controller is effectively a torque controller, which synthesises the stator current required by the connected induction motor to supply the reference (required) torque. Refer to Figure 1 for a typical block diagram of the control strategy.
A microcontroller continuously computes the necessary values and distribution pattern of stator currents. This requires rotor change-of-position signals from an incremental shaft encoder mounted on the motor. The microcontroller runs an algorithm which converts the measured motor currents from three-phase rotating currents into two-phase direct currents, which are the equivalent of the armature and field currents in a DC motor. These are compared with the reference values needed to produce the required torque, and the errors are processed, reconverted to three-phase rotating voltage reference levels, and applied to the inverter bridge. An internal speed control loop can be selected to enable the vector controller to be configured as a precision speed controller if required. The incremental encoder is used as speed feedback for the control loop. The result is that precision torque and speed control can is achievable. The response of the motor is very fast – typically a 100% torque step can be applied to the load in less than 10 milliseconds.