Analysis of three methods for sensorless speed detection in DC motors

Vázquez-Sánchez, Ernesto; Gómez-Gil, Jaime; Rodríguez-Álvarez, M. J.

doi:10.1109/powereng.2009.4915231

Cited by 6 publications

(3 citation statements)

References 12 publications

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“…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%

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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“…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%

A Novel Method for Sensorless Speed Detection of Brushed DC Motors

2016

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“…Además, si se estima la distancia temporal entre ellas o el número de ondulaciones por unidad de tiempo se pueda también estimara la velocidad. Algunos ejemplos que detectan las ondulaciones de la componente ripple y estiman la velocidad y la posición se encuentra en [30][31][32][33][34][35]. El problema de estos métodos reside en la detección de las ondulaciones de la componente ripple.…”

Section: Encoder Incremental Motorunclassified

“…Estos métodos por lo general presentan un bajo coste computacional, pues constan básicamente de un comparador y un filtro. El problema de estos métodos es que se ven afectado profundamente por el ruido presente en la corriente [35,118,119]. Esto ha sido discutido en la discusión del método anterior.…”

Section: Comparación Con Otros Métodosunclassified

Contribución en el ámbito de la tecnología sensorless para la detección de la velocidad y posición en motores dc monitorizando únicamente la corriente: mejora de la precisión, minimización del coste computacional y aplicabilidad a motores de alta potencia

Sánchez¹

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Electric motors are systems that transform electric energy into mechanical energy. Many applications require controlling some output magnitude of motor as speed and position. To control these magnitudes, it is requires measuring the magnitude with an observer. There are two type of observer: conventional observers and sensorless observers. Conventional observers are mechanical systems coupled to the motor shaft and measure the magnitude of interest. Some examples are tachometers, encoders and potentiometers. Sensorless observers are methods or techniques that only measure the current and/or speed to estimate the magnitude of interest. The main advantages of sensorless observers, compared to conventional observers, are as follows: not require couple to motor any mechanical element, decreased maintenance, number of connections and cost of the final system, and an easier miniaturization process. Sensorless observers in DC motors are divided into three groups: those based on the dynamic DC model motor, those based on the ripple component and those based on the combination of the component ripple and the dynamic DC model motor. Due to different problems, the sensorless observers in DC motors have not replaced to the conventional observers yet. This work aims to solve some problems of sensorless observers used to estimate the speed and/or position measuring only the DC motor current. The work proposes three new methods and each method solves a different problem.

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Speed measurement of a general DC brushed motor based on sensorless method

Chi

Yin

2012

2012 10th International Power &Amp; Energy Conference (IPEC)

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Analysis of three methods for sensorless speed detection in DC motors

Cited by 6 publications

References 12 publications

A Novel Method for Sensorless Speed Detection of Brushed DC Motors

A Novel Method for Sensorless Speed Detection of Brushed DC Motors

Contribución en el ámbito de la tecnología sensorless para la detección de la velocidad y posición en motores dc monitorizando únicamente la corriente: mejora de la precisión, minimización del coste computacional y aplicabilidad a motores de alta potencia

Speed measurement of a general DC brushed motor based on sensorless method

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