Technogym ELLIPTICAL - Electromagnetic Brake; Speed Sensor; Input Module

3.4 ELECTROMAGNETIC BRAKE
The brake is an electromagnetic eddy current brake, consisting of a ywheel mass and a at copper
disk that rotates in the air gap of a winding. When there is a variation in the current to the winding,
the eld produced by it also varies and there is a consequent variation in the eddy currents induced
in the copper disk and the resistance supplied to the movement of the pedals on the equipment.
The coil is powered by a controllable direct current generator to obtain a magnetic eld that is more
or less intense.
Due to the movement, each sector of the disk is crossed by a magnetic eld ow that is in con-
tinuous variation and as a result, inducted electromotive forces are generated in it that cause the
circulation of inducted currents.
These currents move in the opposite direction of the cause that generated them, that is the move-
ment of the disk inside the magnetic eld itself. The result is a braking e󰀨ect that slows down the
movement of the disk. The e󰀨ect is more intense with a larger magnetic eld of the coils and with
a higher disk speed. Due to this operating principle, when the disk is stopped the braking action is
zero.
Unlike the majority of mechanical brakes, which operate using friction forces, there are no parts
subject to wear.
The winding has a resistance of approx. 5Ω (Ohm), as a result the brake absorbs a maximum cur-
rent of 2.2 A.
3.5 SPEED SENSOR
The speed sensor consists of a magnetic induction sensor which detects the heads of the screws
that x the disk of the Electromagnetic Brake.
3.6 INPUT MODULE
It is a module consisting of:
• Input power supply socket;
• ON/OFF switch;
• Fuse holder with two rapid 3.15 A fuses to protect the line and the neutral.
It is located on the front side of equipment.
TECHNOGYM ELLIPTICAL Technical Service Guide
Rev. 1.1
- 22 -
Uncontrolled copy if printed Uncontrolled copy if printed