MTS Systems Series TBF-R Manuel d'utilisateur télécharger pdf (Page 38)

7 Options

7.1 Ballast circuit

A ballast circuit is necessary when the regenerative energy from motor and load is larger

than the energy, which can be taken up by the filter electrolytic capacitors, until the

maximum voltage is reached.

Because of the relatively large capacitor in the power supply unit: the TBF60/5R normally

can do without a ballast circuit.

As for the TBF120/7R, the filter capacitor is only half as large and the voltage as well as the

current is higher, this device is normally provided with a ballast circuit of 35W continuous

power.

Should a braking causes the yellow LED (BALLAST) to light up and 8V can be measured

at MP4, an additional ballast circuit (or a ballast circuit at all) has to be used.

The following ballast circuits are available:

• The BS2/60 with 35W for the 60V device

• The BS2/120 with 80W and BS120/V with 125W for the 120V device

• The ballast threshold is 87V for the 60V device and 172V for 120V devices.

• For the determination of the braking power the following formula can be used:

J n

0 0055. ²

P= Power in [W]

J= Mass moment of inertia in [kgm

]

n= Speed in [rpm]

T= Period duration in [s] (time from the begin of a braking procedure until the begin of the next braking

procedure)

1 2 ... 33 34 35 36 37 38 39 40 41 42 43 ... 50 51

Pas de commentaire

MTS Systems Series TBF-R Manuel d'utilisateur Page 38