Minimum voltage supplied to motor windings

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Discussion Overview

The discussion revolves around the minimum DC voltage requirement for motor windings, specifically in the context of a Hurst motor data sheet. Participants are exploring the implications of the specified minimum voltage and its relationship to motor operation and potential damage.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant expresses confusion regarding the minimum DC voltage of 10V specified for the motor windings, questioning why lower voltages would not damage the windings.
  • Another participant requests additional details, such as the model number and a link to the data source, to better understand the context of the specifications.
  • A participant notes that the data sheet format seems unusual and suggests that it lacks critical details typically found in motor data sheets, such as torque curves and winding characteristics.
  • It is proposed that the specifications might pertain to an External Control Module compatible with the motor, which requires a power supply within the range of 10 to 48Vdc.
  • One participant suggests that the minimum voltage requirement could be ignored, indicating uncertainty about its significance.
  • A participant provides additional context about the motor being an induction motor with specific voltage and power ratings, mentioning that the inverter supplying the motor requires an input voltage of at least 10V to maintain output voltage.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the implications of the minimum voltage requirement, with multiple viewpoints presented regarding its significance and the conditions under which it applies.

Contextual Notes

There are limitations in the discussion due to missing assumptions about the motor specifications and the lack of clarity regarding the data sheet's format and content. The relationship between the minimum voltage and motor performance remains unresolved.

PhysicsTest
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TL;DR
Require clarification of minimum voltage to motor windings
I have seen the following specifications in the Hurst motor data sheet.
1611638499522.png

i have confusion on the Minimum DC voltage to the motor windings. It says as 10Vdc, but even if i give less than 10V it should not damage the motor windings. I can understand the upper voltage if i cross it may damage the windings, but why minimum voltage? Please help.
 

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It may be that there is some condition that you have not specified.
Can you please provide the model number and a link to the source of the data.
 
PhysicsTest said:
Summary:: Require clarification of minimum voltage to motor windings

I have seen the following specifications in the Hurst motor data sheet.
View attachment 276868
i have confusion on the Minimum DC voltage to the motor windings. It says as 10Vdc, but even if i give less than 10V it should not damage the motor windings. I can understand the upper voltage if i cross it may damage the windings, but why minimum voltage? Please help.
That's an odd format for a data sheet. Real motor data sheets should have more detail, like torque curves, winding resistance and inductance, etc. It looks more like a description to me. Maybe they are saying it isn't a good choice if your application doesn't have at least 10V?
 
Baluncore said:
It may be that there is some condition that you have not specified.
Can you please provide the model number and a link to the source of the data.
I have attached the data sheet.
 

Attachments

It appears that those specifications are for the External Control Module that is an option for use with the motor. "The module is compatible with external motor drives using a 10 to 48Vdc power supply"
 
PhysicsTest said:
I have attached the data sheet.
Notice at the top of page 2 it says "Sample Motor Data Sheet". You want the real motor data sheet for your PN.

Try starting here, or contact the manufacturer if you can't find it online.
http://www.hurst-motors.com/Spec_Sheets.html
 
Anyway, the answer to your original question is you can ignore it, I think.
 
The motor it is an induction motor of 60Hz 2poles[3600 rpm]20 V 180 W rated[according to a table attached].
The supply voltage it is from an inverter. The input of the inverter is from 10 to 48 V d.c. and the output 20V [rms] three phases].
The inverter could maintain the output voltage if the input voltage would be not less than 10V but not more than 48 V d.c.
 
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