With sending one pulse into a motor, does that make it move a step?

  • Thread starter Thread starter Aerozeppelin
  • Start date Start date
  • Tags Tags
    Motor Pulse
Click For Summary

Discussion Overview

The discussion revolves around the effect of pulse characteristics on motor movement, specifically whether sending a single pulse into a motor results in a step movement. Participants explore the relationship between pulse amplitude, width, and motor speed, addressing different types of motors including DC and stepper motors.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested
  • Homework-related

Main Points Raised

  • Some participants suggest that a single short voltage pulse applied to a DC motor will cause it to advance slightly, but the relationship between pulse characteristics and motor advance is complex due to inductive effects.
  • One participant notes that the area of the pulse (voltage * time) does not directly represent power in a motor, as the current pulse lags the voltage pulse in inductive systems.
  • Another participant emphasizes that for stepper motors, the speed and number of pulses are critical for movement, implying a different mechanism compared to DC motors.
  • There is mention of variable speed drives (VFD) for AC motors, which utilize pulse width modulation (PWM) to control speed, indicating that amplitude and timing of PWM signals are relevant for AC motor operation.
  • Some participants express uncertainty about the specific type of motor being discussed, which affects the applicability of their responses regarding pulse effects.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the effects of pulse characteristics across different motor types, and multiple competing views remain regarding the mechanisms of motor movement.

Contextual Notes

Participants do not specify the assumptions regarding motor types and configurations, which may limit the applicability of their claims. The discussion also reflects a lack of clarity on the relationship between pulse characteristics and motor performance across different motor types.

Aerozeppelin
Messages
16
Reaction score
0
Does changing the amplitude or width of these pulses do anything?

I'm trying to figure out how to increase a motors speed!

Thanks in advance!
 
Engineering news on Phys.org
A single short voltage pulse, applied to a DC motor, will cause it to advance slightly.

The area of the pulse is voltage * time which does not represent power, except in a resistor.
A motor is partly inductive so the current pulse will lag the voltage pulse. The power applied to the motor is the integral of (the instantaneous voltage multiplied by the instantaneous current).

Changing pulse amplitude or width will change the power delivered. But because of the inductive lag there will not be a simple relationship between amplitude, width and motor advance.
 
  • Like
Likes   Reactions: 1 person
Aerozeppelin said:
Does changing the amplitude or width of these pulses do anything?

I'm trying to figure out how to increase a motors speed!

Thanks in advance!

If you mean a stepper motor and controller it's based on pulse speed and the number of pulses.
http://orientalmotor.com/products/stepper-motors/index.html
 
  • Like
Likes   Reactions: 1 person
Aerozeppelin said:
Does changing the amplitude or width of these pulses do anything?

I'm trying to figure out how to increase a motors speed!

Thanks in advance!

you didn't specify what type of motor, stepper, DC or AC. Stepper is a set of pulses with pulse patterns for the next step. DC is a similar process. AC motors speed can be increased with the use of a Variable speed drive. VFD, this type utilizes pulse width modulation which is a simulated AC current via digital pulses. Then amplitude and timing of the PWM signals can then be used to control the rotations of the AC motor.

edit: just noticed the title specifying step

check the specifications on your particular motor, however it will have similar patterns as per this article

http://hibp.ecse.rpi.edu/~connor/education/IEE/lectures/Lecture_8_Stepper_motors.pdf
 
Last edited:
  • Like
Likes   Reactions: 1 person

Similar threads

  • · Replies 1 ·
Replies
1
Views
1K
  • · Replies 5 ·
Replies
5
Views
3K
  • · Replies 21 ·
Replies
21
Views
2K
  • · Replies 15 ·
Replies
15
Views
2K
Replies
19
Views
3K
  • · Replies 20 ·
Replies
20
Views
5K
  • · Replies 22 ·
Replies
22
Views
6K
Replies
0
Views
2K
  • · Replies 10 ·
Replies
10
Views
2K
  • · Replies 12 ·
Replies
12
Views
2K