Can a Voltage Multiplier and Mechanical Commutator Enhance Motor Performance?

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Discussion Overview

The discussion revolves around the potential for enhancing motor performance by integrating a voltage multiplier and a mechanical commutator with a battery pack in a DC electric motor setup. Participants explore the feasibility of this approach, particularly in terms of increasing voltage output and no-load RPM.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant proposes using a voltage multiplier in conjunction with a mechanical commutator to increase the voltage of the VDC output in opposite polarity.
  • Another participant expresses confusion about the intended purpose of the proposed setup.
  • A later reply clarifies that the motor in question has a high L/R time constant, is designed for high torque and low RPM, and aims to increase no-load RPM through the proposed system of capacitors and diodes.
  • Participants present multiple circuit diagrams to illustrate their ideas, questioning the effectiveness of each configuration.

Areas of Agreement / Disagreement

There is no consensus on the effectiveness of the proposed configurations or the overall approach. Some participants express confusion, while others attempt to clarify the intended application.

Contextual Notes

The discussion includes various circuit diagrams that may lack sufficient detail for full understanding. The assumptions regarding the motor's characteristics and the specific effects of the proposed modifications remain unresolved.

kmarinas86
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I saw the following video:



Lecture Series on Electronics For Analog Signal Processing I by Prof.K.Radhakrishna Rao, Department of Electrical Engineering,IIT Madras. For more details on NPTEL visit http://nptel.iitm.ac.in
Category: Education
Tags:
Voltage Multiplier

So I was wondering, is it possible that attaching a pack of batteries coupled with a motor with a mechanical commutator (for a DC electric motor) and a voltage multiplier allow me to effectively increase the voltage of the VDC output in opposite polarity provided that the system has a mechanical commutation?

Say for example I have the following:

Code: 
 __-INDUCTOR+__COMMUTATOR ON STEEL SHAFT
 |              |
 |              |
 |__|CAP|_______|
 |      /\      |
 |     /  \     |
 -    /    \    |
BAT D^O    DVO  |
 +  /        \  |
 | /          \ |
 |/______|CAP|_\|

Would that work?

Is the following better?

Code: 
 __-INDUCTOR+__COMMUTATOR ON STEEL SHAFT
 |              |
 |              |
 |__|CAP|_______|
 |      /\       
 |     /  \      
 -    /    \     
BAT D^O    DVO   
 +  /        \   
 | /          \  
 |/______|CAP|_\
 
Last edited by a moderator:
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kmarinas86 said:
I saw the following video:



Lecture Series on Electronics For Analog Signal Processing I by Prof.K.Radhakrishna Rao, Department of Electrical Engineering,IIT Madras. For more details on NPTEL visit http://nptel.iitm.ac.in
Category: Education
Tags:
Voltage Multiplier

So I was wondering, is it possible that attaching a pack of batteries coupled with a motor with a mechanical commutator (for a DC electric motor) and a voltage multiplier allow me to effectively increase the voltage of the VDC output in opposite polarity provided that the system has a mechanical commutation?

Say for example I have the following:

Code: 
 __-INDUCTOR+__COMMUTATOR ON STEEL SHAFT
 |              |
 |              |
 |__|CAP|_______|
 |      /\      |
 |     /  \     |
 -    /    \    |
BAT D^O    DVO  |
 +  /        \  |
 | /          \ |
 |/______|CAP|_\|

Would that work?

Is the following better?

Code: 
 __-INDUCTOR+__COMMUTATOR ON STEEL SHAFT
 |              |
 |              |
 |__|CAP|_______|
 |      /\       
 |     /  \      
 -    /    \     
BAT D^O    DVO   
 +  /        \   
 | /          \  
 |/______|CAP|_\


What about:

Code: 
 __-INDUCTOR+__COMMUTATOR ON STEEL SHAFT
 |              |
 |              |
 |__|CAP|       |
 |      /\      |       
 |     /  \     |
 -    /    \    |
BAT D^O    DVO  |
 +  /        \  |
 | /          \ |
 |/______|CAP|_\|
 
Last edited by a moderator:


I don't follow what you are trying to do?
 


Pumblechook said:
I don't follow what you are trying to do?

It's for a motor.

To describe the motor, it has a high L/R time constant and is generally high torque and low rpm. The armature (electromagnet) sits, while the rotor (magnet) interacts with the electromagnet's changing field.

In particular, I am looking to increase the no-load rpm using this system of capacitors and diodes. Also, increasing the voltage should allow the current to rise faster as well.

But to answer my question, you'll have to address what you can tell from the circuit diagrams above.