dc motor we can used as generator but i want know BLDC motor can used as generator. if yes what is the output .please tell me

 

dc motor we can used as generator but i want know BLDC motor can used as generator. if yes what is the output .please tell me

A BLDC will Not be nearly as easy as a brushed D.C. generator.

If you do brushless DC, (BLDC), you'll need what looks like an electronic speed controller (ESC) to set commutation that matches the position of the motor shaft. You'll need some source of power to control the commutation (ESC-like device that makes connections (commutation) based on position of the motor shaft).

 

All you need is a 3 phase rectifier bridge to make a PM BLDC motor generate DC electricity.
The voltage will of course depend on the speed, load, coil resistance, and number of turns in the motor winding.

This assumes you remove any controlling electronics, just connect the bare motor coils.

 

This assumes you remove any controlling electronics, just connect the bare motor coils.

And there's the problem. You have to disassemble the motor hub, remove the control and power switching electronics, add connecting wires to each coil, and reassemble the hub with the wires dangling outside. Only then can you connect the coil wires to rectifiers or whatever.

Small BLDC fan motors are pressed together, making this type of rework difficult.

ak

 

And there's the problem. You have to disassemble the motor hub, remove the control and power switching electronics, add connecting wires to each coil, and reassemble the hub with the wires dangling outside. Only then can you connect the coil wires to rectifiers or whatever.

Small BLDC fan motors are pressed together, making this type of rework difficult.

ak

The BLDC motors we are using in R/C aircraft / helicopters do not have any components inside. They consist of pure wire windings and they are just like the alternators in our cars. They have three wires coming out and you need just a rectifier as Sensacell said.

 

And there's the problem. You have to disassemble the motor hub, remove the control and power switching electronics, add connecting wires to each coil, and reassemble the hub with the wires dangling outside.
ak

All of the Motion Control/CNC servo's I have used all bring the 3ph stator out so they can be connected directly for rectification, if needed.
The PDF show the the output of the 3 sine waves when a BLDC motor is back-fed/rotated.
Max.

 

Since the OP didn't state what type of BLDC motor he is thinking of, all of the replies are valid. BLDC computer fan motors usually have the commutating electronics internal but RC and others don't, so all of the replies fit. This topic is stalled until the OP responds with the type of motor he is thinking of using.

 

Tubeaxial fans, rotary impellers, etc. have all of the commutation guts inside the hub. On larger ones like the Comair Tarzan, there is a C-clip that holds the rotor/magnets/blades in place. Remove the clip and the fan comes apart for modification. Smaller ones, as in PC cooling vans, heatsink fans, etc. have the blade/magnet assembly is pressed into the bearing, and are much more difficult to open.

Bottom line - external commutator/controller = easy; internal brains = not.

ak

 

thank you,
i am trying to use BLDC for wind mill application to generate constant dc power, can i use it or not, suggest me anyone. i want to design one hybrid wind and solar pv system to connect dc micro grid/nano grid

 

can i prefer BLDC or PMSG which one is best for wind

 

thank you,
i am trying to use BLDC for wind mill application to generate constant dc power, can i use it or not, suggest me anyone. i want to design one hybrid wind and solar pv system to connect dc micro grid/nano grid

You do not specify the nature of the BLDC motor, can you show a pic of it?
Many have used the washing machine motors such as the Fischer-Paykel.

Max.