Hi All,

I have a project coming up which involves using pumps which require 141VDC at around 1amp. Anyone have any ideas on what to use as a power supply for these (first in the lab, then in the field).

Thanks for any suggestions,
FW

 

Can you post a link a spec' sheet on the pumps?

Ken

 

What is the input voltage? any size requirements?

 

Are you using 120volt or 220 volt mains?

 

Guys, the specs. I have are inline below, hope they come through OK. I could use either 115 or 220V on the input. No real size requirements.

Specifications & Ｐｅｒｆｏｒｍａｎｃｅ
　　　　　　Item　　　

Note

Specification
　Rated Operation Voltage
DC141V


　Pump Type
DC pump
　DC driver operation
Performance Change

　Bearing Type
Liquid sleeve Bearing


　Motor Type
Brushｌess　DC　Motor

　Insulation
Class E(Coil temperature is under 115 degrees Celsius)


Rated　Motor Speed
4,600 RPM

Vibration　Level
15μm or less (at Rated point)

Electric Character
Operation Voltage Range(Vm)
DC141V ±10％
※3

Circuit Control Voltage Range(Vcc)
DC15V ±10％

Flow Control Signal Voltage(Vs)
DC 0V to 5.0V (Analog)

Power Consumption
150 W ±15％ （at Rated performance）


Operation Current
1.3A ±15％ （at Rated performance）



Electrical Current fuse
3.0A


Current Cut Value
2.2A ±10％


Motor Operation Start Voltage
DC141V ±10％


Insulation Resistance
At DC 500V, 100 MΩ or more (at cold)



　Output Signal for the RPM
Signal:4 pulses/round (Output Duty : approximately 67%)
Signal Form : Open Collector
Output current volume : 5mA
Maximum Input Voltage:50V
(Recommended Pull Up Voltage : DC 15V)
(Recommended Pull Up Resistance : 10kΩ)

 

I think everyone is scratching their heads because of the very odd voltage. No standard transformer gives 141 volts as a rectified output. Two 48 volt windings in series come close (134.4 volts).

At least the current is low enough that some combination of conventional transformers is possible.

 

It's not cheap (I think it cost $600) or small but this supply should work http://www.testequity.com/products/1034/

 

This is just from the top of my head. But if you look at the datasheet for the Lm723 you will find some examples for a high voltage regulator. say you have 120 volt Ac. after rectifying and filter cap say 1000uF, you will have ca 169 volt dc max. Assumed we use half wave rectifying and the 1000uF filter cap the ripple will be ca 18 volt before the regulator at 1 A load. And this will take some load of the heat sink but you still need a large one. But I think this may work at least in the lab. Remember the diode must have a Vrrm better than 2xmains voltage. Also some inrush current protection are needed i guess. If you have a Variable Voltage Autotransformer you can use this for reducing the needed heat sink size.
It is just suggestion

 

fastwalker,

Could post a link to the manufacturer/vendor of this pump/controller?

ken