The PreciseFlex G6000 Controllers operate with motor voltages from 24VDC to 340VDC. Brooks offers three power supplies that are compatible with these controllers: the PrecisePower 300, 1000 and 2000 Intelligent Motor Power Supplies. These units include: integral relays for enabling/disabling motor power on command from the controller, large value output filter capacitors to store deceleration energy for use when power is needed, the ability to absorb line spikes, and built-in fuses.
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The PrecisePower Intelligent Motor Power Supplies are open frame electrical devices that have exposed unshielded high voltage pins, components and surfaces. In addition, these power supplies provide 320VDC volts and take several minutes to bleed down after power is disconnected. These products are intended to be mounted in a cabinet or machine chassis that is not accessible when AC line power is turned on. |
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The PrecisePower 300 is a 300/600 watt power supply that accepts 90 to 264 VAC 50/60 Hz and generates a nominal output of either 160VDC or 320VDC depending on the input voltage. This unit includes a single integral relay for enabling and disabling motor power on command from the controller.
Figure 12-4: The PrecisePower 300
As a rule-of-thumb, 600 watts from the power supply can normally drive motors with a total rating of approximately 2400 Watts. This is because motor power ratings are typically defined by the "rated torque" that can be supplied at the "rated speed" of a motor. However, in most robotic applications, high torque is only required at low speed. For example, the PrecisePower 300 has successfully driven a Cartesian robot at full speed where the sizes of its four motors were 750W, 400W, 200W and 100W (1450W total).
The PrecisePower 1000 (shown below) is a 1000 watt power supply that accepts 90 to 264VAC 50/60 Hz and generates a nominal output of either 160VDC or 320VDC depending on the input voltage. This unit includes a single integral relay for enabling and disabling motor power on command from the controller. As with the PrecisePower 300 power supply, this unit does not include the full safety controls necessary to satisfy CAT-3 requirements.
Figure 12-5: The PrecisePower 1000
For applications requiring a higher power intelligent motor power supply, the PrecisePower 2000 (shown below) delivers 2000 watts from a single-phase 208VAC service or 3400 Watts from a three-phase 240VAC service. This unit includes dual integrated relays for enabling and disabling motor power on command from the controller. In addition, it has safety circuits to automatically shut down the unit if it is switched to a short or is severely over-loaded. If needed, this unit can be configured to satisfy CAT-3 safety requirements.
Figure 12-6: The PrecisePower 2000