AC Motor Suggestions for a new product

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Discussion Overview

The discussion revolves around selecting an appropriate motor for a kitchen appliance that requires specific torque and RPM specifications. Participants explore options between AC and DC motors, considering the application and control mechanisms needed for the motor's operation.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant specifies a need for a motor with around 3 N/m torque and between 150-300 RPM for a kitchen appliance.
  • Another suggests considering DC motors, referencing a source for options, but questions the necessity of AC for the application.
  • A participant clarifies that the appliance is similar to a citrus juicer, indicating that DC motors may not be suitable.
  • There is a question about how to control the speed and torque of a motor if a blender motor is used for testing.
  • One participant notes that the application does not require high torque or high RPM, suggesting that an AC gear motor could be appropriate.
  • A later reply indicates that the participant has decided to use a DC geared motor due to difficulties finding suitable AC motors, expressing uncertainty about using a DC motor in a kitchen appliance.
  • Another participant points out that using a DC motor would require a transformer to convert the wall's AC supply to usable DC voltage.

Areas of Agreement / Disagreement

Participants express differing views on the suitability of AC versus DC motors for the kitchen appliance, with no consensus reached on the best approach. There is also uncertainty regarding the implications of using a DC motor in this context.

Contextual Notes

Participants have not fully resolved the implications of using a DC motor in a kitchen appliance, including the need for voltage transformation and potential safety considerations.

Shamir
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Hello community. I am currently working on a product that requires relatively high torque and rpm, around 3 N/m torque and between 150-300 rpm to be specific. My knowledge about motor is very limited and i am running out of time. I understand that i won't find the exact spec and probably will have to adapt a motor.
How do i go out about doing that is the question..
So any help will be much appreciated. :)
 
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the motor will be used in a kitchen appliance similar to citrus juicer mechanism. so dc is no good. iv been told i can use a blender motor to the spec i need but i don't really know how...
 
You don't know how as in...you don't know how to control the speed of the motor? Or?
 
for example if i bought a cheap blender and wanted to use its motor for testing. the motor with have its own spec, how i do control the speed and torque so i can get the rpm and torque that i need out of it..
 
Your application is neither high torque, nor high rpm so it should be relatively easy to find one to fit the bill. Motors typically run in the multiple thousands of rpm, so what you're going to need is an AC gear motor (AC motor with a reduction gearbox attached). Best place to look in my opinion is GlobalSpec:

http://www.globalspec.com/SpecSearch/Suppliers?QID=22284997&Comp=36&fc=1

You can sort by type of motor, speed, torque, power, configuration, etc. etc. etc.
 
Thank you, globalspec was very useful in finding custom motors, unfortunately they are a bit pricey. I have decided to use a DC geared motor due to the fact i can't find AC motors that match my spec AND dimensions.
Don't know if there are any issues with using a DC motor for a kitchen appliance as i have never come across one.
 
Know that if it is a kitchen appliance, your electricity supply at the wall will be 120V AC, you will need a transformer to step it down to usable DC voltage.
 

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