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Bldc Motor Controller

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53 Threads found on Bldc Motor Controller
Hello! I felt lazy to make a drawing on a simple case, but I found that: There is a description of the simplest possible bldc. You have 3 sensors and their information will generate 3 square signals as shown on the figure's top left. We'll call the coils black coil, yellow coil an
135403 Hi all, Here i have attached the controller circuit schematics(done in LTSpice) for single phase bldc motor. The basic working is that based on the hall sensor signal, the current output of H bridge inverter should reverse. Across points A & B we'll be connecting the motor. Here the pulse signal represents the h
Hi, I am Trying to build a bldc motor controller with the PIC18F4431 MCU. My plan is to use the six step sensorless trapezoidal commutation. Complementary and unipolar PWM, to be precise. The reason I chose this is to use synchronous rectification instead of simplt using the MOSFET intrinsic diodes. This means that, at any given time, (...)
Hi all, I am designing a motor controller for bldc motor(540W, 230V). While designing the power supply section i am using an EMI filter section and a PFC boost section too. In EMI filter a common mode choke is used. my doubt is what should be the current rating of the choke. In some design references i have seen 2,3mH,5A (...)
Hi, I am developing a bldc motor controller and is in the starting one of the design file , i have seen the input stages are as follows: supply, emi filter, boost converter, phase shifted full bridge converter, synchronous rectifer and then comes the inverter. My doubt is why cant we directly give the boost converter output to inverter.
Microchip has one high voltage motor control development kit , also a cheap low voltage bldc starter kit with integrated motor
if the bldc motor is rated 90% efficient and 2000kw power(input) that means the output power is 1800w? i think it is not correct! Surely not, because you are mixing up watt and kilowatt. Apart from this trivial error I wonder what your actual question is?
I wanna choose a MOSFET for brushless motor controller ( 36 volt , 15 Amps) Which is more important in the selection ? (Power MOSFET for bldc motor controller , about 20KHz PWM frequency) Low Rds(on) Low Qtotal (gate charge value) Low Resistive Switching Times (tr , tf , ton , toff) Low trr (reverse (...)
Hello everyone I am newbie in motors and I want to build a bldc driver with AVR micro-controller (AVR is the only micro-controller I have worked with). Is there any full design including schematic, source code (I prefer C) and PCB i would be able to download and start? I have some concerns about the design (such as (...)
Dear members, i have 2 hub motors off 36v and 400 watt each. should i use 2 controllers to control both motors or a single controller can be use to control both hub motors. and what will be the case if i use noormal bldc motor instead of hub motor (...)
Hey guys. I am doing a simple something... Which is a qudcopter basically just coz I always had a fascination to things which fly.... And so I have seen many sites referring and tutoring about how to do these things using arguing etc. I intend to this DiY by using pic microcontroller since I have got the hang of using it and it's fun since we
Hi guys, I have a bldc motor driven with 6-step trapezoidal control. The motor is 48V, 2kW rated. The motor driver is the traditional inverter consisting of 3 half-bridges for the three phases of the motor. MOSFETs are used in the half bridges. The switching frequency is 16kHz. All the 6 PWM signals (...)
" PWM computer fans. ", I do not understand this. Most bldc motors have a chip inside them and sensors to control when the current is switched into which coil. When the fan is actuated, the oscillator starts up to "catch" the rotor it then speeds up to accelerate the motor to its operating speed. This unit switches the 12V on and off (...)
Friends, Which is the cheapest micro controller that can be used to control a bldc motor waiting for your replay thanks in advance :-)
i am unable to display the rpm speed of my motor on LCD screen. While debugging in keil, I get all values correct. But when i load the program in the 8051 controller IC, it doesnt display value on LCD screen. It shows 0 rpm continuously. Here is the code. please help. #include #define LCDDATA P2 sbit BUSY=P2^7; sbit RS=P3^7; sbit R
Hello, We are using the ML4425 3 phase inverter controller IC for driving a bldc for water pumps which form an irrigation system for Tulip Fields. All we need is for the pump motor to spin at 8000 RPM. We will bypass the ML4425?s current sense by grounding the ?ISENSE? pin?we will then control the current which feeds the (...)
Hi capacitor1, the sensorless a bldc motor based on back EMF has a problem at low speed. The only way is to add an additional sensor outside or modify the motor and build a magnetic encoder pcb inside( like described here:
Hi! Are there some experts who would like to Review my bldc motor controller Circuit? You can find it on I would be grateful about any comments! BR, Florian
How can i run a bldc motor continuously and control the speed of it in a easy and primitive way? i know,just by applying power,a bldc wont rotate like normal DC motors,but they need some kind of electronic controller to switch on one set of coils and another set alternatively to rotate the rotor and the (...)
Hi everyone! I am building an 1kw bldc motor controller.I have a problem with 6 MOSFET IRF3205.All Fet are so hot although motor run without load.I use IR2103 to drive Inverter.Bootstrap capacitors are 10uF. Futhermore,I tried to run 250W bldc in bicycle electric and MOSFETs are cool. I use dspic30f4011 (...)