Questions tagged [motordriver]

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53 views

Why does my MIC4605 keep blowing up?

I'm trying do design a mini-PCB, replacable half-bridge for motor control applications. The primary application is to use it with my modular inverter/BLDC/BDC controller. The controller design assumes ...
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1answer
36 views

Capacitor to discharge upon switch open

Update Please evaluate this third attempt: This is my first electrical project, so please be gentle with me. I know very little about electronics. I'm building a machine that has a crank that users ...
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1answer
42 views

Inductors in DC motor drivers

I've been making some research on DC motor drivers and I noticed that most medium power boards don't use inductors, but boards that can provide high current do, like this one: https://www.cytron.io/p-...
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2answers
70 views

How to amplify 3.3 volts PWM to 5 volts PWM

im working on a project to drive a motor using a motor driver that accepts 5 volts PWM (for 100% duty cycle) but im using raspberry pi 3 that has a PWM of 3.3 volts (for 100% duty cycle) as a result, ...
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1answer
43 views

How do I convert a PWM signal (with a specific duty cycle) to its respective Analog value, for an application in a low voltage,high current circuit?

I wanted a 16V,50A regulated power supply but could not find it in the market. I also searched for a buck converter for the same current output and could not find anything. So I thought of making it ...
0
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1answer
33 views

1-wire interfacing with motor (design suggestion and review)

For my application, I need to deploy many sensors and a motor. So I chose the 1-wire bus protocol from Dallas/Maxim. Also, I am using temperature sensors which support one-wire protocol. So I thought ...
1
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1answer
92 views

Variable Frequency Drive with AC motor, 30kW

I have a VFD that controls an AC motor which compresses air. It is an 30kW motor. I have set the parameters required to drive the motor and it runs the motor but not properly. During the test the ...
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2answers
29 views

ic to drive either one pwm signal or another

I have an existing RC circuit for a toy truck. Obviously it already has its own mC to receive the antenna signal and output a PWM signal to a motor driver IC. I want to be able to ALSO control this ...
1
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1answer
62 views

How to get right voltage output with Bts7960b H-Bridge?

I am using a NodeMCU to control a BTS7960b motor driver. (datasheet of the BTS7960) This driver controls a 12v dc motor. This image shows my wiring (without the display and the buttons and with a ...
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7answers
2k views

Why do motor drives have multiple bus capacitors of small value capacitance instead of a single bus capacitor of large value?

All professional DC, BLDC or PMSM motor controllers that I have seen (Sevcon, etc.) have large numbers of DC bus capacitors connected in parallel. Their capacitances range around 100 µF - 220&...
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0answers
61 views

Motor driver powered by PSU instead of battery [duplicate]

I am about to use a motor driver in a project (MDDS30 by Cytron) and I was going to power it using a 12v 11.5a PSU. I discovered that the manufacturer warns against using a PSU, and that it might ...
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0answers
16 views

Infineon IPOSIM tool for IGBT thermal loss calculations

I used the infineon IPOSIM power tool for simulating a motor drive for my required conditions and got the results for a custom input drive cycle. The results were given as power dissipation per IGBT(...
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3answers
190 views

Problems with dc motor driver design: Mosfet fail

I made a brushed dc motor driver. The motor speed is controlled with PWM (from an Arduino). The motor that I'm using draws 3 amps without load. This is the schematic: As you can see there are two N ...
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1answer
36 views

STM32F0, DRV8840 and GPIO Problems

Today I tested a DC driver with a STM32 MCU. The schematic is like this: I have a problem with the ENABLE Signal between the DRV8840 and the MCU. When the DC Motor is disconnected, I toggle the EN ...
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0answers
206 views

BLDC startup algorithm

How do real world algorithms for sensorless BLDC motors handle startup under load? Right now I run phase 1 for a few milliseconds to get the rotor in a known position, the I run open loop for a ...
1
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1answer
49 views

Should I be concerned about reverse current?

I have incorporated a reference design from this page on discrete driver circuits for vibration motors for the high-side configuration. Here is the picture of the circuit: I'm concerned about the ...