Sensorless speed/position control of brushed DC motor

Afjei, E.; Ghomsheh, Ali Nadian; Karami, Alireza

doi:10.1109/acemp.2007.4510598

Cited by 20 publications

(20 citation statements)

References 3 publications

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“…If the Boolean value is replaced by 1 and by 0, then the output of this block can be calculated according to: (18) The blocks AND and OR are blocks that implement the logical operations with these names. The block with the symbol | | calculates the absolute value of its input.…”

Section: Supervisor Blockmentioning

confidence: 99%

“…B indicates if the distance between f m and the estimation is within the allowable distance. B is used to calculate C t according to Equation (18). C t determines how many times the allowable distance between f m and the estimation has been exceeded in the last L iterations.…”

Section: Supervisor Blockmentioning

confidence: 99%

“…The observers based on the ripple component use a part of the ac current signal, which is called the ripple component [2,18]. This component is the result of two effects.…”

mentioning

confidence: 99%

“…The number of undulations per second, or ripple frequency, is related to motor speed [21]. Many methods in the literature use the ripple component [2,18,[22][23][24][25].…”

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confidence: 99%

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A Novel Method for Sensorless Speed Detection of Brushed DC Motors

2016

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Many motor applications require accurate speed measurement. For brushed dc motors, speed can be measured with conventional observers or sensorless observers. Sensorless observers have the advantage of not requiring any external devices to be attached to the motor. Instead, voltage and/or current are measured and used to estimate the speed. The sensorless observers are usually divided into two groups: those based on the dynamic model, and those based on the ripple component. This paper proposes a method that measures the current of brushed dc motors and analyses the position of its spectral components. From these spectral components, the method estimates the motor speed. Three tests, performed each with the speeds ranging from 2000 to 3000 rpm either at constant-speed, at slowly changing speeds, or at rapidly changing speeds, showed that the average error was below 1 rpm and that the deviation error was below 1.5 rpm. The proposed method: (i) is a novel method that is not based on either the dynamic model or on the ripple component; (ii) requires only the measurement of the current for the speed estimation; (iii) can be used for brushed dc (direct current) motors with a large number of coils; and (iv) achieves a low error in the speed estimation.

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Section: Supervisor Blockmentioning

confidence: 99%

Section: Supervisor Blockmentioning

confidence: 99%

“…The observers based on the ripple component use a part of the ac current signal, which is called the ripple component [2,18]. This component is the result of two effects.…”

mentioning

confidence: 99%

“…The number of undulations per second, or ripple frequency, is related to motor speed [21]. Many methods in the literature use the ripple component [2,18,[22][23][24][25].…”

mentioning

confidence: 99%

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A Novel Method for Sensorless Speed Detection of Brushed DC Motors

2016

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“…A method, referred to here as commutator noise method, uses the variations produced in the current or voltage on the motor main input power lines as the brushes move from one collector blade to the next; the frequency of variation is proportional to the ω [3]. The method is described briefly here.…”

Section: Introductionmentioning

confidence: 99%

Sensorless speed control of a permanent magnet DC motor by compensating the plant nonlinearities

Saurav

Potluri

2013

2013 IEEE International Symposium on Industrial Electronics

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Permanent magnet dc motors are popular for the simplicity of their control. Exist a few methods of sensorless speed control (SSC) of these motors. Each of these methods has its limitations that restrict its wider applicability. One of these methods uses the sensing of applied armature voltage and armature current to obtain an estimate of the motor speed, and then uses this estimate for the feedback control of the motor speed. In the microcontroller-based control of a PMDC motor, or a dc motor with separate fixed excitation, driven by a switchmode dc-dc converter, the converter may have a nonlinear inputoutput characteristic that reduces the tracking accuracy of this method. This paper presents a way to obtain a compensator of this characteristic automatically, and to thus improve the performance of the method.

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