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Fan AC Motor Speed Controller - 120V 15A 4000W
Fan AC Motor Speed Controller - 120V 15A 4000W
Connie-C
Reviewed in the United States on January 9, 2025
In my laboratory, there are a number of AC APPLIANCES which require variable voltage. For example non-traditional mixing /stirring devices we built in order to fit into some custom chemical procedures - as well traditional things like ventilation fans which have to be precisely controlled to prevent over-exhausting which might upset delicate light precipitated powders that can not afford to be blown about.This is a sturdy, well made device with relatively accurate controls and switches. It is a good idea if you are using it in a permanent spot, to screw-it-down at the designed holes provided.I emphasis "AC APPLIANCES" because it is important to differentiate the need to affect the operating voltage of AC Appliances opposes to DC Appliances. This unit works for AC Appliances - as the input and output cord-receptacles imply. In our laboratory we also employ the use of a separate variable voltage resistor specifically for DC devices.Basically what we are doing here is placing a variable resistor between the wall plug voltage output and the receiving appliance voltage. This essentially decreased the available working power to the appliance while still maintaining the proper and necessary oscillating frequency between positive and negative required for proper AC operation. Ohm's law still applies.With that said, keep in mind, this device has a "15 amp" overload protection, in the real world, there are a number of power tools or motorized devices that can exceed 15 amp upon startup.With any device that works on the principle of increasing or decreasing voltage, amperage and the like, you can always expect heat to be a by-product.Amazon's $25 price is about right considering you are getting a good quality device. Of course with Amazon, you are always getting the extra assurance of easy returns and Amazon's additional satisfaction guarantee. When it comes to electrical items, it is always better to error on the side of "paying more and getting more". If for no other reason, many fires are caused by electrical device failures.
Greg Garavaglia
Reviewed in the United States on January 25, 2025
It does not stay at the same setting you set it at. If you set it to 50% it will change gradually to 82% in a hour or so. Looking for a higher quality unit.
Customer
Reviewed in the United States on August 24, 2024
Worked greatUse to slow sanding machines
RJK
Reviewed in the United States on August 11, 2024
Using it on a big fan that only has High and Low. Even Low is a bit much, so using this device has really helped keep the noise down from the fan.
JBurdman7
Reviewed in the United States on December 13, 2024
I got this motor speed controller to add control to an otherwise on-off 800W radiant heaterArrives in a plain glossy white boxNo company name, address, email address, or telephone number are anywhere to be found. There are no safety certifications on the unit but the box claims "C E"The build quality is better than average, see photosWhat this thing does is it turns the output on and off really fast giving a reduction in power consumption in a way that SOME products work Ok with... but not many. Some devices if you feed them this kind of chopped up power they will fry. You can not use this with a single phase induction motor for example. All you will get is an overheating motor. You can't use this with most things TBH so if you are not familiar with what kind of power your load can handle, don't risk it.The socket is difficult to insert plugs into because plastic is blocking the passage. I don't understand if they are supposed to be safety shutters or what.The internal circuit for the triac [BTA41-600B] uses inefficient resistors to power the circuit and consumes about 1.5W when switched on. Voltage display over-reads by 5V at 120VC input.Many loads will emit humming and buzzing when plugged in to this thing even when this is turned up to full power. My heater makes a buzzing now but not too badly. I suspect any of these controllers would work the same way.
RichardC
Reviewed in the United States on November 21, 2024
I am using it on a central vacuum, smaller than most. It works fine as long as I leave the speed at about75%
Don Wolf
Reviewed in the United States on November 18, 2024
It's great for my fan but it's not FULLY adjustable like it shoukd be! It's NOT the product either! I'm pretty sure it's the size of the motor thats affecting it! If that makes any sense! Lol. Overall though, great purchase and it does do what I wanted!!! It slows this big 1/4 hp fan motor down enough to not to have on full blast all the time!! Still a 5-STAR though!!! 🙂👍👍
WD
Reviewed in the United States on November 14, 2024
I am using this speed controller to control the speed on a barrel type shop fan. This fan was a two speed fan and the rotary type speed control switch on the fan broke. With the broken switch this fan ran only at full speed which is usually way more air and noise than I want to put up with. I plugged the fan into this speed control box, plugged the speed control box into the receptacle, and now the speed is pretty much infinitely variable from full speed down to way slower than the low speed used to be.The fan runs well down to about 60 volts as displayed on the speed control box, but the slower the speed, the more buzzing noise the motor makes. Down to about 60 volts, the noise is not too bad and the motor seems to be operating OK. Below 60 volts there is a lot of buzzing and it's pretty obvious that the fan motor is not happy. I checked how warm the motor was getting during all of this testing, and the motor never got what I considered to be too warm.Of course, my testing was with one particular fan, and other motors and loads will probably react differently. I would have rated this device 5 stars but that motor buzzing noise is kind of aggravating when the fan is running at slower speeds.I should add that the build quality of this device looks excellent. I had no issues with anything about this device except that my particular fan was noisy when operating on it at low speeds.
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