Motor Controller

Dear Sir,

Can you help me in developing a 24/36 mosfet controller for tricycle?



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Should be able to please give more concise information like all the motor information.




load so on

hgsan (author)  Josehf Murchison3 years ago

Dear sir here is motor information:

volts 48v

watt 800w(rated) 1200w (max output)

amps 16-17A (rated and on load)

Hp ?? (not printed on motor)

load ?? if you are asking how much load I am going to put on this motor then it will be nearly around 500kg to 600kg with frame.

N.M (torque) 28(rated) 42(max output)

RPM 2700 to 3100 (+-100)

motor is a 3 phase DC motor. one more thing Sir, I have also designed MOSFET configuration. I will share it after completing it on schematic.



The horsepower is in the watts 746 watts is 1 Hp.

3 phase DC that is a bit different.

Does it have 3 or 4 wires going into it?

Where do the wires go in the motor? (Ie the stater Armiture)

Does the motor have 2 or three brushes?

hgsan (author)  Josehf Murchison3 years ago

ok Sir.

It is a 3 phase dc motor. It has 8 cables totally. 3 thick line of phase cable and 5 thin wires of holzer(hall element) and for starter Armiture I have to first disassemble the motor.

It sounds like you know what you are working with.

Are you planning to use the mosfets driven by a Pulse Width Modulator or a current regulator.

hgsan (author)  Josehf Murchison3 years ago

Not exactly Sir.

not sure. But according to planning mosfet will be driven by PWM.

Check the wires with a multi meter and see if the motor is wound like this.

3 Phase.jpg
hgsan (author)  Josehf Murchison3 years ago

I do not have multimeter yet. But I have already ordered and it will get arrived today or tomorrow.

And according to me thick wire diagram is correct but do not know thin wire diagram is correct or not.

OK that is a stepper motor sometimes called a 3phase stepper motor.

The first schematic for a half bridge driver.

To reverse the direction of the motor switch any two of 1, 2, 3, wires or any two of 6, 7, 8.

The second schematic is for an external input signal.

3 Phase.jpg
hgsan (author)  Josehf Murchison3 years ago

Sorry Sir,

Did not understand your schematic fully. I am planning to control motor by PWM signals. Second I am designing this for my tricycle and maybe for my high power green bike. The board which I am reversing is showing that all wires of hall sensor is directly connected to MCU pins. Configuring mosfet parallely is not major issue for me but I am facing problem in MCU section. I am confused here in selecting MCU because the board which I am reversing is based on a chinese MCU and those company is not going to share datasheet and sample code.

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