Alternatives to Shaded Pole Gearmotors for Oil Skimmer application

  • Thread starter kunalv
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In summary, alternatives to shaded pole gearmotors for oil skimmer applications include permanent split capacitor (PSC) motors, brushless DC motors, and stepper motors. These options offer improved efficiency, better torque characteristics, and reduced noise levels. PSC motors provide higher starting torque, while brushless DC motors are known for their energy efficiency and low maintenance. Stepper motors allow for precise control, making them suitable for applications requiring accurate positioning. Each alternative presents unique advantages, allowing users to select a motor that best fits their specific operational needs and performance criteria.
  • #1
kunalv
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Hello, so I am building an Oil Skimmer for my VMC. The skimmer has 2 gearmotors, one for the belt rotation and another one for a fan which I would like to immerse in the coolant to create a vortex (Got this idea off Youtube!)

I am using two Shaded Pole AC Gearmotors for this application which I had in stock with me but upon running the machine I have found the RPM to be on the lower side. Attaching a pic of the machine build for reference.

I have since spoken with some local manufacturers who did not seem too convinced of their motors suiting my application. So my questions are :
1. Which other gearmotors can I use for this? They need to be small, compact, lightweight. And preferably cheap.
2. How do I control their speed?

Any help would be appreciated. Thanks.
KV
WhatsApp Image 2024-02-10 at 14.26.44.jpeg
 
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  • #2
kunalv said:
Hello, so I am building an Oil Skimmer for my VMC.
What is a VMC ?
 
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We need more information.

Does this system run 24 hours per day and 7 days per week, for an hour or so per week, or somewhere in between?

What is the RPM and power of the existing motors?

What RPM, or range of RPM, do you want?

We need all of this information. For example, if it only runs a few hours per week, you don't care what it looks like, and you can fabricate some mountings, one possibility is a low cost electric drill:
Drill.jpg

The speed can be controlled a screw pushing on the trigger speed control, and they are available cheap. But they are not suitable for 24/7 operation because the brushes wear out.

Shaded pole gearmotors are available in a wide range of speeds and power. This is a page from the McMaster-Carr catalog showing one type of gearmotor. They have a large selection of other types. I do not know if they ship to your country, but this gives an idea of what is available:

Gearmotor.jpg

You will need to spend some time finding what speed and power you need. You might find that you could use, for example, a variable speed drill to find the speed, then buy a gearmotor for that speed.
 
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FAQ: Alternatives to Shaded Pole Gearmotors for Oil Skimmer application

What are the main alternatives to shaded pole gearmotors for oil skimmer applications?

The main alternatives to shaded pole gearmotors for oil skimmer applications include permanent split capacitor (PSC) motors, brushless DC (BLDC) motors, and stepper motors. Each of these alternatives offers different advantages in terms of efficiency, control, and performance.

Why would one consider using a PSC motor over a shaded pole gearmotor?

PSC motors are more efficient than shaded pole motors, often providing better performance with lower energy consumption. They also tend to run cooler and have a longer lifespan due to less heat generation. Additionally, PSC motors offer better starting torque, which can be beneficial in oil skimmer applications.

What advantages do BLDC motors offer in oil skimmer applications?

BLDC motors are highly efficient and offer precise speed and torque control, which can be advantageous in optimizing the performance of oil skimmers. They also have a longer lifespan and require less maintenance due to the absence of brushes. Moreover, BLDC motors generate less heat and noise, making them a more reliable and quieter option.

Are stepper motors suitable for oil skimmer applications, and if so, why?

Stepper motors can be suitable for oil skimmer applications that require precise positioning and speed control. They offer excellent repeatability and can hold their position without the need for a feedback system. However, they may not be as efficient as PSC or BLDC motors and can generate more heat, which might be a consideration depending on the specific application requirements.

How do cost and availability compare between shaded pole gearmotors and their alternatives?

Shaded pole gearmotors are generally the least expensive option due to their simple construction and widespread availability. PSC motors are moderately priced, offering a good balance between cost and performance. BLDC motors are typically more expensive but provide superior efficiency and control. Stepper motors also vary in cost but can be more expensive due to their precision capabilities. Availability can depend on the specific requirements and suppliers, but all these motor types are widely available in the market.

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