This paper describes simple position control of sensorless hybrid stepper motor (HSM). A mathematical model for hybrid stepper motor is derived using mechanical and electrical equations, which is used to estimate the position of the motor using Extended Kalman Filter (EKF). In position control, estimated value is compared with the reference position and when both coincide, the motor is held at ...

This paper presents a robust control strategy for the two-phase PM-hybrid stepper motor. In order to eliminate the parameter and load variation influence, a position controller based on the sliding mode structure is investigated for high performance positioning applications. The field-oriented control is also applied to the hybrid stepper motor, with the purpose to improve the dynamic performan...

November 2003 The L297 Stepper Motor Controller is primarily intended for use with an L298N or L293E bridge driver in stepper motor driving applications. It receives control signals from the system’s controller, usually a microcomputer chip, and provides all the necessary drive signals for the power stage. Additionally, it includes two PWM chopper circuits to regulate the current in the motor w...

1 Introduction All modern functional languages use variants of the Hindley/Milner type system. This system is quite exible since it allows values to have more than one type, and it is convenient because types can be derived automatically, making explicit type declarations unnecessary. Most trivial programming errors cause the type-deriver to emit error messages, which are usually easy to unders...

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Article history: Received 25 October 2012 Accepted 14 April 2013 Available online 2 June 2013

This technical note highlights the system requirements and operating conditions of automatic air recirculation valves and reviews compatibility of existing actuator types with these requirements. When comparing the available technologies, it becomes clear that air recirculation flap actuators containing a bipolar stepper motor offer key advantages over actuators with other motor types. It is sh...

This paper presents the detailed mathematical and Simulink® model of a two-phase stepper BLDC motor in the machine variables, proving the rotor's position role in supplying the motor. Then an extended Kalman filter (EKF) is designed to estimate the motor state variables: stator currents, and the rotor position and velocity, on the basis of noisy measurements of stator currents, since it has a n...