Liquid Cooled Motors (LK)
Liquid cooled motors must have a proper closed loop cooling circuit. The cooling medium has to be composed from desalted and demineralized water chemically neutral and with the addition of anti-corrosion agent. Such products must be compatible with all the components of the circuit.
Do not connect the cooling system to a regular water line!
Using regular, untreated water can cause severe damage to the cooling system and it is to be avoided in any circumstance.
For additional conditions, refer to the following notes:
• Maximal water inlet pressure (< 1 min) Pmax = 1 MPa (10 Bar)
• Rated water inlet pressure Pn = 0,5 MPa (5 Bar) max.
• Minimal water flow and minimal pressure drop: listed in the catalogue or relevant datasheet (varies according to motor, size)
• PH-value: 6,5 to 7,5
• The recommended water hardness is 0,7 mmol/l. If cooling water does not meet this parameter, plasticizers should be used
The use of inhibitors to prevent corrosion in aluminum is strongly recommended. The ratio of anticorrosive agent (25%) to water (75%) should not be exceeded, otherwise a reduction in performance may occur.
Alternatively, other coolant can be used, such as water-glycol antifreeze, various coolant oils, etc. In this case, however, reduced performance is to be expected. The specific derating is determined by calculation after consultation with the manufacturer.
A constant monitoring of cooler flow is recommended.
Inlet cooling media temperature must be between 5° and 25°C to avoid condensation inside of the motor; in any case the inlet coolant temperature must be higher than the motor frame temperature of at least 2°C
Before activating the motor, make sure the cooling circuit is completely filled and leak free.
|Risk of damage!
Note that connection to the cooling circuit must be provided with use of flexible hosing. Otherwise there is a risk of motor damage.
Take extra care when handling with liquid cooled motors. Careless handling can easily cause damage of the connection fitting.
When connecting the linear motor to the external cooling system a spanner of appropriate size must be used to support the linear motor inlet and outlet fitting connection (see Figure below). Failure to do so may result in the cooling system leakage or in a complete failure of the linear motor!