Hello everyone, I am an electronics enthusiast in China. I also like to play electric bicycles and yearn for a free life. However, it is illegal to modify electric bicycles in China. We cannot even discuss this topic. China's electric bicycle modification forum has been forced to close, so I can only come here to discuss and share various issues about electric bicycles with you, thank you all.
After careful observation, I found that the ZHONHEN APR48-3G is simpler and easier to modify and adjust the voltage and current than the Eaton APR48. The advantages are: ① The shell has a screw structure, while the Eaton shell has a rivet structure. ②The voltage adjustment resistor is on the outside of the control board. ③There is space to install a voltmeter. ④There is space to install the current adjustment potentiometer. ⑤12V power supply with voltmeter. ⑥ Both voltage and current can be adjusted linearly. ⑦ There are two channels of overvoltage protection. ⑧There are 7 filter capacitors. After simple modification, it can operate 42V-60V, 0-38A. If the second overvoltage protection circuit is connected in series with a 12V regulator tube, the output voltage can be increased to 70V (the original capacitor has a voltage resistance of 63V, and the output filter capacitor needs to be replaced). If you want to increase it to 100V, you need to remove the transformer and put the second The secondary coil of the circuit is changed from parallel to series. The YouTube tutorial I posted, 42-60V, 0-38A, you need to prepare a voltage and ammeter (0-100V50A) shunt 50A75mV, a 20K trimmer resistor (note to adjust it to 10K before installation, otherwise it will shut down inexplicably and you will be at a loss) ), a 1.5K linear potentiometer, some insulating tubes, etc. My video tutorial is very complicated, but the modification is actually very simple and easy.
The main structure of Eaton APR48 and Zhongheng APR48 are the same, but there are big differences in details. I think Zhongheng APR48 is an optimized version of Eaton APR48. The modification of Eaton APR48 is difficult, so I chose Zhongheng APR48 for modification. It's very simple. When changing the voltage regulation, remove R281 (10K resistor) and replace it with a 20K trimmer resistor. To adjust the current, you only need to cut off a current feedback line and connect a 1.5K potentiometer in series. Yes, it is that easy.
After careful observation, I found that the ZHONHEN APR48-3G is simpler and easier to modify and adjust the voltage and current than the Eaton APR48. The advantages are: ① The shell has a screw structure, while the Eaton shell has a rivet structure. ②The voltage adjustment resistor is on the outside of the control board. ③There is space to install a voltmeter. ④There is space to install the current adjustment potentiometer. ⑤12V power supply with voltmeter. ⑥ Both voltage and current can be adjusted linearly. ⑦ There are two channels of overvoltage protection. ⑧There are 7 filter capacitors. After simple modification, it can operate 42V-60V, 0-38A. If the second overvoltage protection circuit is connected in series with a 12V regulator tube, the output voltage can be increased to 70V (the original capacitor has a voltage resistance of 63V, and the output filter capacitor needs to be replaced). If you want to increase it to 100V, you need to remove the transformer and put the second The secondary coil of the circuit is changed from parallel to series. The YouTube tutorial I posted, 42-60V, 0-38A, you need to prepare a voltage and ammeter (0-100V50A) shunt 50A75mV, a 20K trimmer resistor (note to adjust it to 10K before installation, otherwise it will shut down inexplicably and you will be at a loss) ), a 1.5K linear potentiometer, some insulating tubes, etc. My video tutorial is very complicated, but the modification is actually very simple and easy.
The main structure of Eaton APR48 and Zhongheng APR48 are the same, but there are big differences in details. I think Zhongheng APR48 is an optimized version of Eaton APR48. The modification of Eaton APR48 is difficult, so I chose Zhongheng APR48 for modification. It's very simple. When changing the voltage regulation, remove R281 (10K resistor) and replace it with a 20K trimmer resistor. To adjust the current, you only need to cut off a current feedback line and connect a 1.5K potentiometer in series. Yes, it is that easy.
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