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#1
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Need Help with Power Supply Selection
Good afternoon!
I apologise that has got into another's theme! At me a question: It is required to me запитать 5 motors: SY85STH156-6204A - 3 pieces (a current of 6,2 amperes) SY85STH118-6004A - 2 pieces (a current of 6 amperes) The driver to 80 volt. Prompt please what transformer to me it is necessary to select for capacity? As it is correct запитать 5 drivers If it is possible, draw the scheme. Yours faithfully Vasily! |
#2
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Vasek,
here is the thread that talks about motor selection and calculation : Calculate the Voltage and VA size of the DC power supply for stepper motors/geckos |
#3
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Because of the motors' inductance, the 80VDC maximum voltage of the stepper driver, you will be limited to 80VDC. A 50VAC transformer will develop 70VDC after rectification. A 55VAC transformer will develop 77VDC after rectification.
The motors will draw a maximum of 30.6A, if they all draw maximum current at the same time. You can probably use a 20A power supply, which is about 66% of 30.6A. 20A X 50VAC = 1,000VA 80,000 X 20A / 50V = 32,000 uF capacitors. If I were building that power supply, I would use: 1 each 50VAC 1000VA transformer 5 each 6,800uF 160V capacitors (wired parallel) 1 each 400V 50A bridge rectifier AnTek makes the PS-15N70 that is rated 21-Amps for $210. They also have the PS-10N70 that is rated 14-Amps for $150. |
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