Convert the voltage of the battery into the working voltage of the electrical appliances (such as speakers, meters, lights, etc.) on the electric vehicle!

This figure is based on physical analysis. The power supply provides a voltage of about +12V for IC1 through D2 and R1. The output pulse of 6 pin drives Q1 oscillation after coupling with C4 and transformer. When Q1 is turned on, the output current passes through L filter after C9. Power is supplied to the load. When Q1 is cut off, the magnetic energy of the transformer-type inductor B3 is converted into electric energy, the polarity of which is left-right and right-right, and the free-wheeling diode D4 is turned on. The current continues to supply power to the load through the diode, so that the load obtains a smooth DC when the output When the voltage is too low or too high, the sampling voltage is obtained from the voltage dividing circuit composed of the resistors R11, R10, and R9, and is sent to the IC1 pin 2 to compare with the internal 2.5V reference voltage to control the Q1 conduction pulse width, thereby stabilizing the output voltage. . When the load current is short-circuited or exceeds 8A, the rise of the IC1 pin voltage will control the pulse width to turn off Q1 to ensure the safety of Q1. C8 and R7 constitute the oscillation time constant. The oscillation frequency of this circuit is 65KHz. The calculation formula is as follows:

1 error amplifier output / compensation 2 voltage feedback input 3 current sampling input 4 oscillator circuit time constant 5 ground 6 switch tube drive pulse output 7 power supply 85V reference voltage is generally connected to the oscillator

The converter has 3 wires. There is a wiring diagram on the general converter. If there is no color, the red color is 48 volt input, black is the common negative, and yellow is the 12 volt output. [Depending on the manufacturer, different colors may be different) I have a way to distinguish. Use a multimeter to switch to the diode position (on-off position). The red pen is fixed to one foot first, the black pen tests the other two pins (this is a process of repeated testing), and the multimeter screen displays data at 312 (data is for reference only). ). Next, the red pen does not move, the black pen connects to the other foot, and the multimeter displays 589 (data is for reference only). Conclusion: When the multimeter red pen is connected to the DC negative pole, the black pen is connected to the other two poles. The high value is DC positive and the low is 12V output.

First, high precision 36.48V to 12V price: 12.5 yuan / only

60V to 12V price: 13.5 yuan / only

72V to 12V price: 14 yuan / only

80V to 12V price: 20 yuan / only

40-60V to 24V price: 20 yuan / only

40-75V to 24V price: 25 yuan / only

40-100V to 24V price: 35/yuan/only

40-60V to 36V price: 20 yuan / only

40-75V to 36V price: 25 yuan / only

40-100V to 36V price: 35/yuan/only

Second, the light source enhanced converter

31V-75V to 14V output 10A: 20 yuan / only

31V-75V to 16-18V output 10A: 25 yuan / only

Fourth, high power converter

Input 31-75V to 12V 15A (standard): 35/only

Input 31-75V to 12V 15A (enhanced): 80/only

Input 31-75V to 12V 20A (enhanced): 120/only

Input 31-75V to 12V 25A (enhanced): 150/only

Input 31-75V to 12V 30A (enhanced): 160/only

See what you want, almost the price.

Cable Terminals

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Cable Terminals

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