BRAKEMATIC^® controls for electrohydraulic drum and disc brakes are consisting of a programmable frequency converter with function modules (software) and an input unit (pedal, internal or external parametrization interface, process control module with measuring sensor). A frequency change is generated at the output of frequency converter. This frequency change is used for activation of an ELDRO^® thruster so that its hydraulic force can be varied. The resultant actuating force of ELDRO^® is effective opposite to the braking force of braking system so that this relation forms the basis for the control of braking operation.

Note: Working in conjunction with an electrohydraulic brake, the BRAKEMATIC^® control forms one functional unit, i.e. both components are specifically adapted to each other. If one of the components is to be replaced, recalibration of the overall system is necessary.

Use of the BRAKEMATIC^® controlled braking systems is recommended in cases where specific drive or braking operations in machines and equipment are to be kept under control so that necessary safety functions and time regimes can be adhered to. BRAKEMATIC^® brake controls may be subsequently integrated in existing drive systems. Consequently, they are ideal for reconstruction and revamping of equipment.

The spectrum of admissible feed voltages (optionally DC or single-phase or three-phase AC) permits flexible use. The customer can be sure that the product series BRAKEMATIC^® offers optimum lowcost solutions for a wider field of application of electrohydraulic brake systems.

Depending on the brake functions desired, three BRAKEMATIC^® variants are available:

BRAKEMATIC^® pedal (type "BM P ...")
... is an electronic pedal control with „manual“ parameter presetting for generation of an analogue-controlled braking operation. The system permits sensitive braking of travelling operations and rotations. Accuracy of positioning and operational comfort are decisively improved. Especially undesired load change impulses or even oscillation of crane loads can be drastically reduced or even eliminated at all.

BRAKEMATIC^® ramp (type "BM R ...")
... is and electronic control for the creation of fixed and preprogrammed braking torque characteristics. Thus coercive guided opening and closing movements of brakes are realized. Short braking times, multistage or continuous braking processes are possible according to the preselected ramp function.

The BRAKEMATIC^® ramp is offered specifically for remotecontrolled cranes where crane operation is required with a minimum of control signals. Only a simple control signal is required for activation of the ramp function. After that, for example a complete shutdown regime may be automatically executed.

Another possible application solution is the automatic control of load-dependent excessive speeds in case of downwards operating belt conveyor systems. One maximum and minimum value each of admissible conveyor speed is acquired as limitation parameter and transmitted to the frequency converter. If the upper limit value is exceeded, the conveyor speed is reduced on the basis of a preselected functional sequence. If the lower speed limit is reached, the frequency converter deactivates the ramp and the conveying system returns to the normal operation mode.

BRAKEMATIC^® advance (type "BM A ...")
... is an electronic control with variable parameter presetting for generation of controlled brake torque characteristics. In this case an external reference signal (usually rotation) and a programmed presetting parameter (e.g. time, rotation) are evaluated and a linear or nonlinear time function is calculated in the frequency converter. An integral process controller module makes a permanent setpoint/actual value comparison of calculated characteristic and the actual values. Proceeding from the guide signal generated by the controller, the frequency converter modifies the working frequency at the ELDRO^® thruster and thus controls the process of braking operation.

Safe adherence to brake time stipulations is the initial prerequisite for the realization of the shutdown regime of complex belt conveyor systems. This is the only way to provide protection from surcharges caused by asynchronous stoppage of conveyors. The application of BRAKEMATIC^® advance is excellently suited for this job since it ensures the preset braking times independent of the conveying direction (up or down) and the loading status.

rackbound travelling and trolley gears are another field of application. Due to unfavourable friction (metal to metal contact) in combination with swaying loads, heavy braking torques, (e.g. caused by operation of EMERGENCY STOP) or adverse climatic influences it might occur that wheels are blocked. In those cases the BRAKEMATIC^® advance can be used as antilock system.