TRACKER
TKR800 Series 1/4 - 3 HP Digital Motor Control

Standard Features • Programmable Features • Specifications
Model Ratings/Dimensions • Connections

General Description

The Carotron TRACKER TKR800 series of motor controls provides full range, single quadrant, digital speed control of shunt wound or permanent magnet D.C. Motors. Six TKR800 models, all NEMA 4 enclosed, are available to operate motors between 1/4 and 3 horsepower. Various models are offered with options that add a process follower interface (0 - 10VDC or 4 - 20 mADC), summing input or trim pot interface. The TKR802 models are customer connectable for operation at 115 VAC or 230 VAC single phase input. When operated at 115VAC input, each unit supplies variable armature voltage up to 90 VDC and a fixed field voltage of 100 VDC. For operation at 230 VAC input, each model supplies up to 180 VDC for armature voltage and a fixed field supply of 200 VDC. The TKR803 models are customer connectable for 230 VAC input operation only and has outputs of up to 180 VDC for the armature voltage and 200 VDC for the field voltage. The TRACKER can be programmed to operate as a Master or Follower. In Master Mode, the TRACKER uses actual motor speed (Feedback Input) and a digital setpoint input by the user to precisely control the speed of the motor. The digital loop of the TRACKER operates on a 10 ms control cycle which feeds into an analog velocity loop. Actual motor speed is read and the drive speed is corrected first by the inner velocity loop. The motor speed is then fine tuned to the digital setpoint by the outer digital control loop. The Digital Output Value (which is fed into the analog velocity loop) is made up of two parts: the Open Loop term, and the correction term or Trim Value. The open loop term is the ratio of the Reference Speed to Maximum Speed. This is the uncorrected Feed Forward part of the Output Value. The Reference Speed is the current Speed setpoint taking into account any acceleration or deceleration which may be in progress. The Maximum Speed is Max RPM Feedback which is set when scaling the unit. The correction term or Trim Value is derived from actual motor speed (Encoder Feedback Input) and the Reference Speed. The Trim Value is added to the Open Loop term when the Tracker is running Closed Loop to provide precise control. The Error Gain determines the rate at which the Trim Value changes in response to a motor loading or a sudden speed change. The Trim Value is updated every 10ms. It may be viewed as one of the programmable display options. In Follower Mode, the basic operation is the same except that the Reference Speed is generated as a ratio to the Lead Input speed.

Standard Features • Programmable Features • Specifications • Model Ratings/Dimensions • Connections

Back to Top • Back to DC Drives and Product Listings

TRACKER
TKR800 Series 1/4 - 3 HP Digital Motor Control