Questions tagged [brushless-dc-motor]
A brushless DC electric motor is a DC motor type that uses an electronic inverter/switching circuit to energize the motor coils in a sequence (based on the detected rotor position) in order to rotate the motor.
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Strange BEMF shape in sensorless BLCD open loop phase
I am trying to develop a sensorless ESC for the BLDC motor. At the moment I am able to shortly (about 10s) drive the motor in open loop before the lower side FETs get hot. I have the following setup. ...
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Power Electronics- 4 switch BLDC drive
I am working on a project involving a 4 switch 3 phase open end winding BLDC motor, and am currently working on the drive for this motor. For such a 4 switch inverter topologies, how should the DC ...
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BLDC motor theory of operation
I'm looking to test my understanding of BLDC motors. As I understand things, the operation of the motor occurs along the speed/torque line. The slope of this line is determined by the windings and is ...
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BLDC sensorless driving
I found this image in another post in this forum
Here's the link:
BLDC Motor PWM commutation scheme
on how to drive BLDC motor coils which is the more efficient way than to just apply pwm on a high ...
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Resistor values for ULN2003 mosfet driving
I'm designing this board for driving a BLDC motor 3-phases (A, B, C).
I'm using 12 V supply, three half bridges, each consists of one P-channel high side mosfet and N-channel low side mosfet, ...
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Protecting motor/H-bridge when cutting power supply with relay
On our subsea robot, we use SPE-75 thrusters (sorry for the poor datasheet, it's the best available without NDA, but even the complete one is no better from the electronics point of view).
Basically, ...
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Regenerative currents and back-EMF
I am using Cubemars' AK70-10 KV 100 BLDC (which I believe has the driver board V2.1) and in some cases I am running the current against my movement and even performing some fast decelerations. I have ...
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12 V DC 120 A Starter Relay Schematic Help to Power Motor [closed]
I want to verify if this relay circuit makes sense before I use it to power my motor. The concern I have is with the +44.4 V positive line seen by my relay. I am not sure if that is rated for the ...
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DC motor control with inner and outer loop control
I want to design a DC motor speed control system, with inner current loop and outer speed loop. I have already designed that system with only a speed loop with well tunned PI parameters. But when I ...
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Regenerative braking with BLDC and buck converter
I am working on an electric vehicle as a personal side project (a couch) and it is driven by 4 BLDC hoverboard motors and using aftermarket 3 Phase Motor Controllers. The couch is powered by a 2P6S ...
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Reverse engineering of Mercedes S-Class rear seat fans: how to make them work?
I'm new here, so I apologize in advance if I'm not clear. I'll do my best to clarify your questions as soon as possible.
For a professional project, my team and I purchased the rear seats of a ...
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How do I select MOSFETs for a 3-Phase Motor Driver DRV8302 Application
This is my schemaics (Design in accordance to DRV8302 Application note guidelines).
How do I select MOSFET specs for this design? How do I determine what range of Vgs, Id, Qg, etc I need for this ...
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3 'Phase' BLDC Motor Control using Raspberry Pi 5
I am making a project to control speed and position of multiple 3 Phase BLDC Motors using a Raspberry Pi 5. I am struggling with the number of PWM channels I will need and the lack thereof on the Pi ...
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Torque calculations in AC motor
I am studying the theory of brushless electric motors and do not understand how to calculate the torque delivered by a motor.
Let's assume a PMSM brushless motor using a FOC.
I found these two ...
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Logic for the motor stuck fault
I am controlling the BLDC motor using Foc hall sensor, recently damaged the hardware by not incorporating sufficient safety logics. One i want to incorporate is the Motor stuck fault, the current ...
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