Thursday, 19 May 2016

Using a Step Up Transformer to Run Ebike Motor

Using  a Step Up Transformer to Run Ebike Motor

Swaping from a 24 volt system to a 48 volt? Well that means a new battery . . or does it?

Can you use a step up transformer to turn 24v or 36 v in to 48v?

Yes you can but you may run in to trouble with supplying enough amps.

This is the kind of transformer which can be had on ebay. It is rated at 2000w but the this is a maximum wattage under ideal conditions.

If you were to input 46v anf take out 48v not doubt this transformer would provide close to 2000w but with alarger step up it will provide a lot less . . just 500w stepping up from 24v to 48v.

A 2000w Step Up Transformer Fresh from Ebay

Wiring and Adjustment is Easy - You will need a volt meter

The Transformer would not provide enough amps.
The problem lies in that a ebike motor rated at 250w will use perhaps double this when climbing a hill. A 500w motor such as the one I have will then use 1000w.

This transformer might wrok if you were stepping up fron 24v to 26v on a low wattage motor. But a step up of more than 12v and you will likley have trouble on high amp applcations such a electric traction motors.

Here are the specs copied from the sellers listing on Ebay:

 Output Current: 20A(MAX) More than 18A, please enhance heat dissipation,
 Constant current range: 20A(max)
 Output Power = Input voltage * 20A, such as: input 12V * 20A = 240W, input 24V * 20A = 480W, input 48V * 20A = 960W, input 60V * 20A = 1200W

As you can see the 20a max input means that at a given input voltage the watts are resytcited by the performance of the transformer.

(If you need more power, you can use two modules in parallel, such as the output to 30A, two modules can be used in parallel,the current per module can be adjusted to 15A.)
 Working temperature: -40 to + 85 degrees (ambient temperature is too high, please enhance heat dissipation)
 Operating frequency: 150KHz
 Conversion efficiency: up to 95% (efficiency related with input,output voltage, current and voltage difference.)
 Overcurrent protection: Yes (With current limiting adjustment, adjustable output current limit, current exceeds the current limit, the output current is automatically reduced to a minimum 5A, according to the nature of the load current will be different.)
Short circuit protection: Yes (input 30A fuse) double short circuit protection, the use of more security.
Input reverse polarity protection: None (if necessary, please enter the string into the diode)
Output prevent reverse irrigation: Yes, for charging plus blocking diode is not required.
Installation: 4pcs 3mm screws
 Connection: solderless;terminals output
Module dimensions:86*63*68(L*W*H)
 Weight: 350g

Pin define:
CV: Output voltage adjustment
Adjust to CV potentiometer, according to your battery or LED to set the required output voltage value.

CC: Output current adjustment
Adjust to CC potentiometer counterclockwise about 30 laps, the output current is set to the minimum,then connect the LED,adjust to CC potentiometer to the required current. (Please adjust the converter after the battery have already been discharged when charging. )Please do not use the short-circuit way to adjust current.

Package Include: 
1 x 1200W 20A DC Converter Boost Step-up Power Supply Module IN 10-60V OUT 12-80V

Environmental Consultants London

1 comment:

  1. Indeed, the transformer has made long-distance transmission of electric power a practical reality, as AC voltage can be “stepped up” and current “stepped down” for reduced wire resistance power losses along power lines connecting generating stations with loads.
    Power transformers in India | Transformer manufacturer in India