Products
ELECTROMAGNETIC SPRING-APPLIED FAILSAFE SAFETY BRAKES.

Rated Torque T2N

To ensure that ERD-FAIL SAFE-BRAKE safely stops the load even under extreme conditions, the required braking torque must be multiplied by a safety factor depends essentially on the application.

T2N = Terf . K

Tert = Required braking torque (Nm)

The dynamic torque of a two-disc brake may be substantially lower than the rated torque.

Required Braking Torque Tert

The required braking torque very often is a mixture of dynamic and static load. When choosing the sign take into account whether the load torque supports or counteracts the deceleration.

Rough Definition of the required Braking Torque

If the mass moment of inertia is unknown and the driving power is fixed then the required braking torque is calculated as follows :

Thermal Load

The dimensioning solely on basis of the required braking torque is permissible only in very few cases. When decelerating the load and the mass moment of inertia reduced to the brake shaft, the kinetic energy is converted into heat (friction work of the brake). The permissible friction work in dependence on the switching frequency may not be exceeded. Please note that the maximal permissible Friction work is valid only up to the corresponding speed. In case of emergency stop from maximum speed the maximal permissible friction work lies considerably below the values specified in the graphic.


Service life

The service life depends to a large extent on the peak temperature at braking, which is dependent on the speed, the deceleration time and the current braking torque.
For that reason it is not possible to make universally valid statements with regard to the service life that apply to all operating conditions. Statements to the individual case can be made only when all operating conditions are known.
At no time should the friction lining thickness be less than min. permissible thickness.


POWER SUPPLY :-

ERD FAIL SAFE BRAKES requires D.C. voltage for operation. For the power supply different half wave or full wave rectifiers are used. The rectifiers can meet the voltages up to 205V for D.C. and 720V for A.C. supply.

NEW ADDITIONAL VERSIONS :

1) VORTEX offers 2 more sizes at the lower end to cater to the sub 1 N-m braking torque applications.

2) VORTEX also offers electro brakes with hydraulic amplification to cater to applications in forklift trucks, etc where ....either variable braking torque may be required or where separate braking functions might be required for the ....dynamic braking and the parking brake.

Contact VORTEX design team for more details.