Brake Circuit Stage 1 - Linde E25 Service Training

Service Training
2.6.5.4 REGENERATIVE CURRENT BRAKING
2.6.5.4.1

BRAKE CIRCUIT STAGE 1

When the driver depresses the accelerator pedal for the opposite direction of travel or the brake pedal,
regenerative current braking is initiated. In order to activate regenerative current braking, the speed of the
truck must be at least 0.9 km/h (below this speed the truck operates with the traditional reverse current
braking). The regenerative current contactor 1K5 makes and the contact of 1K5 opens. At the start of braking
the power module is on, allowing a current to flow from the battery through resistor 1R2 and so exciting the
field windings of the motor. After their excitation, the motors function as generators and they supply a
generator voltage. Contactor 1K6 makes at the same time, which connects both field windings of the two
motors in parallel to prevent transient currents from flowing between the motors that would lead to
unfavourable braking characteristics.
Section 2.6
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