This paper considers adaptive position control of a permanent magnet (PM) stepper motor using exact linearization via static state-feedback. Physical outputs are chosen in such a way that the resulting closed-loop system is linearized and decoupled. The objective of the adaptive controller for a PM stepper motor is to achieve output tracking between the motor outputs and prescribed reference si...

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...

This paper presents an improved micro-step voltage-fed actuator for an automobile active grill shutter (AGS) system. A novel structured stepper motor, which contains both the main and auxiliary teeth in the stator, is proposed for the actuator. In a normal permanent magnet (PM) motor coils are generally wound on all the stator teeth, however, in the proposed motor, the winding is only on the ma...

Permanent Magnet (PM) stepper motors are widely used in accurate systems which are affected by external disturbances and parameters uncertainty. Also, an appropriate nonlinear controller is needed when the problem is to track the reference signal. In this paper, a robust adaptive controller is presented to control rotor angular position in stepper motors. The main idea to make a robust controll...

Figure 1. Pull-out torque and output power for a 57 mm PM stepper driven by a unipolar L/R-driver and a NJM3770A bipolar constant current driver. Stepper motors are used in many different types of applications this makes it difficult to recommend a general step-by-step design flow chart. The design process is more an iterative process, involving experience, calculation and experimentation. The ...

The requirement of precise control in servo applications used in the digital systems led to the development of stepper motors. The precise and zero backlash operation of steppers extended its reach to various position control applications. The lack of requirement of sensors for position control applications was one of the main reasons for preferring stepper motors. Since the stepper motors were...

Permanent Magnet (PM) stepper motors are widely used in precise systems which are affected by external disturbances, parameters uncertainty and saturated control. Also, an appropriate nonlinear controller is required when the problem is to track reference signal. This paper presents a robust adaptive controller to control rotor angular position in stepper motors. The main idea to make a robust ...

A linear electrostatic stepper motor has been designed and fabricated in a single mask surface micromachining process.. It consists of two drive units that alternately generate a step to move the shuttle. The friction and adhesion in the clamps has been measured. A friction coefficient of 0.8 * 0.3 have been found. The adhesion in the clamp is just low enough to release the clamping shoe. Stepp...

This paper describes the design and implementation of microstepper motor drive and a control system for two-phase hybrid stepper motor. Based on LM3S6965 arm processor, this paper proposes an approach to subdivide the step to microstep with required number of steps for stepper motor to improve positioning accuracy. Sine/cosine microstepping method is used to adjust the current in each winding o...