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0answers
38 views

Regenerative energy Dissipator for BLDC motor

I want to design a circuit to dissipate the reverse energy from BLDC motor, can I use PWM control technique in voltage sense circuit in order to switch on the power circuit? In detail : In my ...
0
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1answer
35 views

PWM phase voltage and current measurement for power consumption calculation for a BLDC MOTOR

I have been trying to log both voltage and current from the battery of an electric two wheeler for finding out efficiency at inverter, battery level.
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0answers
39 views

BLDC hoverboard motor with no specifications

I have this kind of motor but I can not find any electrical specifications about it. All I know is that is a 36V,250W BLDC motor. How can I determine the number of poles, the coil resistance/...
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0answers
65 views

SVPWM for BLDC Motors: Switching Losses vs Neutral Point Voltage Swing/fluctuation

I am implementing a SVPWM (Space Vector Pulse Width Modulation) scheme for a 3-phase inverter (3 H-bridges, nothing fancy) to control a BLDC Motor. Since one can choose which zero vectors (000 or 111)...
1
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2answers
130 views

How to determine PWM Frequency of a MOSFET to drive a BLDC motor?

What are the factors determining the PWM Frequency of the MOSFET driver circuit that drives a BLDC motor. Is there any equation for PWM calculation? For eg. I need to control the speed of a BLDC ...
0
votes
1answer
199 views

PWM speed control of 24V DC Brushless Pump

I would like to PWM speed control a 24V 2A DC Brushless Pump using an Arduino for my nano-brewery project. I've been searching for a Speed controller on Amazon or Ebay. But, i either find brushed ...
0
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0answers
106 views

Mosfets heat up in a BLDC controller

I am trying to build a bldc controller. I have the following schematic I should mention that for the gate drivers I used ir2101 ICs. Everything works fine but when I connect the motor (350w ...
0
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1answer
224 views

How to drive 4-pin fan

I've been attempting to get this 4-pin brushless dc pc fan working for some time now. It has a red (+) black (-) blue (PWM in) and yellow (tachometer out). I only want this fan running at maximum ...
1
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2answers
426 views

Dealing with coupling of PWM noise into Hall-Sensors as spikes in BLDC driver circuit

I have designed the first revision of a BLDC driver board (based on STM32 and DRV8323 chips). Right out of the bath (after writing the firmware of course) I noticed that the coupling of PWM into the ...
0
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4answers
2k views

Using a BLDC motor for regenerative braking

I am planning on using a BLDC motor to drive a small go-kart like vehicle. I would like to implement regenerative braking, but am having trouble finding certain details. My main concern is being able ...
-2
votes
1answer
210 views

Hard and Soft Chopping

I am controlling my BLDC (Brushless DC motor) controller with PWM technique by changing the duty cycle to reduce the power(current) in phase winding. what is hard and soft chopping in PWM based ...
0
votes
1answer
83 views

BLDC motor's frequency

I have a 3-phase motor. I want to find out the frequency of the motor so that I can supply the required PWM frequency for the motor. My motor specification: 360 Watts (36v and 10A) rated max 30 ...
0
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0answers
74 views

Issue with RPi and BLDC controller board

I'm having some trouble figuring out what I'm doing wrong so hopefully someone can spot my error and help set me straight. These are my motor and the board with everything labeled. Then below that is ...
0
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2answers
1k views

Function of gate resistor

I've been studying some ESC (electronic speed control) circuits for BLDC motor control and something always catch my attention. In many of these schematics there's often a resistor connecting the ...
1
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0answers
183 views

Low frequency PWM Brushless DC Motor Speed Control

I am programming a L293D motor driver with a BLDC motor to spin at speeds of 60-300 RPM. It is for a hybrid drone/car where I want the motors to spin slowly while having the necessary torque to drive. ...
3
votes
3answers
2k views

What does changing the throttle to a BLDC ESC actually do?

Background: I understand how the standard 50 Hz PWM protocol for hobby electronics works: varying the on-time from about 0.5 ms to 2.5 ms will throttle an actuator from roughly 0% to 100% thanks to ...
1
vote
3answers
438 views

PWM switching in BLDC motors: ratio between switching losses versus conductive

There were some good posts regarding choosing the PWM switching frequencies considering the needs of the motor control. Here I am focusing rather on understanding of how to decrease losses in the ...
0
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2answers
2k views

Speed and Torque control of a BLDC

First off, I have very little knowledge in electrical engineering and my last official contact with the subject was when I was in high school so go easy on me. I am trying to understand if it's ...
0
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1answer
629 views

problem with BLDC motor drive using PWM

We are trying to speed control a BLDC 48V 500W hub motor using hall sensors we are using IRF540N mosfets with IR2112 gate drivers and arduino as MCU we implemented the 3 phase inverter and in testing ...
0
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3answers
1k views

Dynamic Braking MOSFET Control Circuit [duplicate]

I am dealing with a regenerative power situation with BLDC motor and servo drive controller.The power supply is 48V regulated DC but during deceleration due to regeneration, the voltage at drive ...
1
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2answers
1k views

Selection of PWM switching frequency in BLDC motor

Is there any method or formula for selecting PWM switching frequency based on measured motor parameters for controlling BLDC motor?
2
votes
4answers
6k views

Using 12V fans with a 24V PSU

I have recently acquired a 3D printer and have been experiencing all kinds of trouble with the fans used to cool the printer head, the parts and the controller board. The controller is a smoothie-...
0
votes
1answer
274 views

3-Phase Inverter Control with SPWM(Sinusoidal PWM) for 3-phase sinusoidal output

I intend to control a motor with 3 120° phase shifted sinusoidal signals. I already implemented the SPWM to output a sinus shaped voltage, but i am a little bit confused at how should i implement it ...
1
vote
1answer
320 views

H bridge heating issue when driving BLDC

Hi I have been trying to create a custom Brushless DC motor driver circuit using P type and N type transistors (known as H bridge). This is the circuit I designed and prototyped on the breadboard. ...
3
votes
1answer
3k views

BLDC PWM frequency

I am driving a BLDC motor using a 6-step commutation table at a 40kHz PWM frequency and I am at a loss choosing the optimal one. I understand that the max frequency depends on the motor's R/L ratio ...
1
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0answers
327 views

Stuttering of Gimbal Brushless DC Motor

I am trying make a Gimbal BLDC motor spin slowly (~0.2Hz). For some reason I have problems with the motor stuttering, as shown in this video. At the end of the video I also show PWM signal from the ...
0
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2answers
807 views

Delay function in code composer studio

new with code composer studio. Trying to run bldc motor with rm48 cncd. Lotsss of problems, one of them is any delay function available for ccs? I generate pwm signals with a certain delay using idle ...
1
vote
2answers
500 views

Convert 3.3V PWM of Beaglbone black to 5V PWM

I have a Beaglebone Black revC. I want to use a brushless motor (EMAX XA2212/1400KV) with ESC (hobbywing skywalker 20) . Beaglebones Vpp voltage is 3.3V and ESC gives ( gives beep about 2 sec interval)...
0
votes
1answer
253 views

What amp rating ESC do I need?

I am working on an electric longboard, retaining the original battery pack and brushless hub motors. I want to be able to control this with an Arduino. I want to know what size ESC I will need. The ...
2
votes
1answer
710 views

How to generate PWM signal for BLDC motor using dsPIC33?

I am a beginner with microcontrollers and am working on a project that uses the dsPIC33 microcontroller to control a BLDC motor. I am having trouble generating the PWM signal output. I will be using ...
1
vote
2answers
1k views

Sensorless driving of 3 phase BLDC motor for gimbal applications?

I have started to work on a project of mines, which consists in implementing the stabilization of a single axis gimbal using a generic microcontroller (STM32 or Arduino Uno). The gimbal axis is ...
0
votes
2answers
110 views

Motor control using PWM [duplicate]

Can we give a PWM of amplitude more than the rated voltage to a motor but making sure that the averaged voltage is lower than that of the rated voltage of the motor.Is it safe for the motor?
3
votes
1answer
537 views

Is this a case of PWM interference?

I have a Electronic Speed Controller (ESC) being controlled with Pulse Width Modulation (PWM) from an Arduino. When I put my hand close to the cables the signal goes screwy until I move my hands away....
1
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0answers
1k views

A strange problem in BLDC motor drive: PWM frequency and duty cycle go wired

I am working on a BLDC motor controller to drive a 2kW BLDC motor with six-step control. The design has two board, one MCU board and one interver board, and the picture below shows one phase drive ...
-1
votes
2answers
4k views

Controlling brushless gimbal motor (BGM2804)

I'm using a standard board for control this type of motor (SimpleBGC), this board uses an atmeg328p e some brushless drivers. I'm writing a simple code for turn left/right with some velocity, but i'm ...
1
vote
1answer
673 views

What determines BLDC rotation direction when using trapezoidal commutation with BiPolar Switching?

Block commutation seems simple enough, the rotation is determined by the order in which the 6 step sequence is executed (ex. cw 1->6 or ccw 6->1) What's confusing is how bipolar switching changes ...
1
vote
1answer
1k views

Testing an h-bridge using the power supply and/or signal generator to control a DC motor

I'm using the DRV8836 (datasheet here) from Texas Instruments and can't seem to get it to work. Does it require a PWM (pulse from the signal generator) or am I able to drive it with only the DC power ...
1
vote
1answer
1k views

BLDC motor waveforms

I'm trying to drive a brushless motor (BLDC) with an ATMEGA328p I use Timer0/1/2 to generate 3 different PWMs @ 62Khz. First I tried (only absolute values) $$A = \sin(T)$$ $$B = \sin\left(T + \frac{...
1
vote
1answer
6k views

What's the relationship between ESC pwm input and output?

I'm using ESC(Electronic speed controller) to control outrunner brushless dc motor. As you know ESC detects ppm signal between 1ms and 2 ms approximately. So my ESC detects signal between 4% and 9% ...
0
votes
2answers
589 views

Can i use a PWM HHO Controller to control Brushless DC Motor?

Hi im a electronics newbie. The part im talking about is DC 10-50v 12V 24V 48V 3000W 60A amps DC Motor Speed Control PWM HHO Controller here is the link My ...
1
vote
0answers
630 views

BLDC motor control PCB

I am trying to make a PCB to control a Sensorless Brushless motor. I just wanted to know if it looks right. The IC I am using is a TB6588FG it has a 2.5A peak output current. I want to use it with ...
2
votes
3answers
1k views

DIY current-limited 40A+ power supply to emulate LiPo batteries

I want to do some experiments developing brushless DC motor control hardware, and maybe wiring my own motors for my own edification. LiPo batteries aren't convenient enough, and I want current-...
2
votes
2answers
628 views

BLDC Motor Commutation Based Speed Control

I am working on a project which has a motor to drive a gyroscope (it has quite a bit of mass, and we want it to run at 60k RPM or more). The motor we built has very low inductance. We started using ...
0
votes
2answers
762 views

Motor/driver for smoothest and most constant speed

Which type of motor/controller can maintain the smoothest and most constant speed in the range 300 - 1000 rpm with minimal vibration? ie: low cogging torque, etc. I have an application in mind which ...
5
votes
2answers
6k views

What is the use of PWM over brushless control

I just saw this question How do I eliminate PWM noise when driving a fan? but cannot think of the reason why is doing PWM over brush-less control useful. I am assuming people are trying to control ...