A stepping motor is an open-loop control element stepping motor that converts an electrical pulse signal into an angular displacement or a linear displacement. In the case of non-overload, the speed and stop position of the motor depend only on the frequency of the pulse signal and the number of pulses, and are not affected by the load change. When the stepper driver receives a pulse signal, it drives the stepper motor. The set direction is rotated by a fixed angle called the "step angle" whose rotation is performed step by step at a fixed angle. The angular displacement can be controlled by controlling the number of pulses to achieve the purpose of accurate positioning. At the same time, the speed and acceleration of the motor rotation can be controlled by controlling the pulse frequency, thereby achieving the purpose of speed regulation.
This article will introduce you to the design case of stepper motor control system and the classic application of stepper motor.
A stepping motor controller with a finite bit function In the focusing system based on the image processing evaluation function, a mountain climbing search method is commonly used. According to the principle of mountain climbing search, in the process of searching for the focus, in the process of searching for the focus, it is necessary to prevent the program judgment error due to interference such as image noise, and the focus lens is out of the boundary of the focus range. In order to meet this control requirement, the universal stepper motor controller has been improved to introduce limit signal feedback control while having automatic and manual control functions. The motor controller is written in hardware description language (HDL) and the limit signal is automatically fed back by the photoelectric switching device in the position sensing circuit.
Design of Micro Displacement Stepper Motor Control System Based on TMS320F28335 This system plans to use DSP to control stepper motor to promote the smooth positioning of the measuring device by moving the light device. The main controller used in the system is DSP28335, and the controlled object is a 42 stepping motor with a minimum step angle of 1.8°. The DSP output PWM pulse wave is used to break the motor through the motor driver. The system changes the setting of the PWM parameters according to the specific control requirements, and corrects the process parameters through the relevant algorithms to complete the system purpose. The control accuracy of the motor control system is 10μm linear displacement, which can be used for laboratory projects and can be widely used in the field of motor control.
Design and research of automotive combination instrument based on CAN bus - stepper motor drive, storage circuit design and peripheral circuit This system stepper motor VID29 series two-phase automotive instrument stepper motor. vID29-XX/VID29~xXp instrument stepper motor is a kind of precision stepping motor with built-in gear ratio of reduction ratio 180/1. It is mainly used in the instrument indicator plate of vehicles, and can also be used in other instrumentation devices. The digital signal is directly and accurately converted to the analog display output, which requires two logic pulse signals to drive.
Design and implementation of integrated stepping motor driver based on CAN bus This paper designs an integrated two-phase stepping motor driver based on CAN bus, including CAN transceiver L9616, MCU STM32F103C6, optocoupler isolation, driver chip SLA7033M, temperature sensor and D/A conversion. After receiving the frame data packet sent by the master core, the CAN transceiver L9616 sends the data packet to the MCU. STM32F103C6 analyzes the data packets transmitted from the CAN transceiver. The MCU controls the high-precision D/A converter to make the output current of the SLA7033M constant. In addition, the MCU also monitors the temperature of the heatsink on the SLA7033M.
Speedometer design based on stepper motor driver MC33991 This design uses the microcontroller MC68HC908GR16 as the main control chip, and uses the stepper motor X15.288 as the actuator. The MC68HC908GR16 is an 8-bit microcontroller from Freescale Semiconductor with 16 KB of FLASH memory and 1 KB of RAM memory. Its internal phase-locked loop (PLL) up-converts the external 32.768 kHz crystal frequency to an 8 MHz internal bus frequency. The microcontroller integrates an enhanced serial communication module (ESCI), eight 10-bit A/D modules, an SPI module, and an 8-bit keyboard module. It has two independent 16-bit timers, each with 1 timer. A timer counter and two input and output channels. It also integrates a timing base module that periodically wakes up the microcontroller from STOP mode.
Using AT89S51 and CPLD to realize the control of stepper motor This design uses the single-chip microcomputer to collect the field signal and then calculate the control information required for the stepper motor operation, and then transmit it to the CPLD. The CPLD converts the received information into the actual stepper motor. The control signal (running direction, operating speed) is output to the drive circuit of the motor. The advantage of this is that the microcontroller and the CPLD do their best. The MCU can focus on complex algorithms such as converting between input signals and output information. It does not require excessive CPU resources to directly control the motor, and reduces the possibility of introducing interference. CPLD only needs to transmit the MCU. The information is converted into a motor control signal.
Design of Automobile Auxiliary Lighting Follower System Based on Stepper Motor Control Technology This design is based on the single chip AT892051 chip as the control core. The stepper motor is controlled to drive the auxiliary illumination source and rotate with the rotation of the steering wheel. It plays an auxiliary role in the headlight illumination of the car. The auxiliary lighting source uses high-brightness LED lights that can be installed or removed at any time. Simply attach the permanent magnet at the bottom of the light source to the top of the cab or to any part of the car. The Hall switch is used to detect the steering, the angle of the car and the speed of the turning. The detection signal and the reversing signal are sent to the input interface of the single chip microcomputer, and the rotation of the stepping motor and the auxiliary light source is controlled by the single chip microcomputer, thereby implementing the follow-up control.
Design of the focusing system of the stepping motor based on TMS320F240 This system uses the stepping motor to drive the camera to complete the zoom, because the stepping machine rotates accurately according to the step angle and is controlled by the DSP. The traditional focusing method in engineering has been improved, the precision is greatly improved, and the test system is stable in operation. Because the DSP is easy to operate and written in C language, it is easy to modify and transplant the program in the future.
SOPC-based stepper motor multi-axis controller The SOPC-based stepper motor multi-axis controller described in this paper is applied to the sampling needle shifting system of semi-automatic biochemical analyzer, which can realize all the traditional stepper motor multi-axis controller. Control function, the size of the controller is smaller than the traditional controller; when the digital circuit part of the controller needs to be modified, there is no need to replace the actual hardware circuit of the controller, which greatly facilitates the research and design work of the controller and saves the corresponding development cost.
Economical Stepping Motor Control System Based on STC Microcontroller This system uses STC12C4052AD single-chip microcomputer. Its working mode, rotation speed and torque number can be input through the keyboard, or can be adjusted by ordinary knob or upper computer. The keyboard display module is implemented by ZLG7289. The system has versatility, and the stepping motor of different phase numbers can be controlled by appropriately changing the control terminals of the output ports.
The control system of stepper motor composed of DSP and PBL3717A This paper uses DSP or other microprocessors to select two or more PBL3717A and a small number of passive components to form a stable multi-phase stepper motor drive system. Full-step, half-step or micro-step control is possible. Such a method is low in cost, easy to implement, and stable in performance, and is a good choice for a stepping motor drive system.
Research and design of stepper motor controller based on GAL device The stepper motor controller consisting of GAL16V8 is used for automatic control of three-phase six-shot working stepper motor, which can be used independently for driving objects. It can be run under the management of the PC and does not take up the CPU time. With a single GAL, complex sequential circuits can be realized, reducing the size of the system. With computer-aided design, the design speed is greatly accelerated, errors are reduced, costs are reduced, system reliability and stability are improved, and it can be repeatedly modified and programmed with great flexibility.
Stepper Motor Control Technology Based on MCU and DSP The motor control theory discussed in this paper can be implemented by a full hardware solution or by a microcontroller or DSP. It shows how to use a transistor as a switch to control a two-phase single-pole motor. The base of each transistor is connected to a digital output of the microcontroller through a resistor that can be used from 1 to 10 M ohms to limit the current flowing into the base of the transistor. The emitter of each transistor is grounded and the collector is connected to the four taps of the motor winding. The center tap of the motor is connected to the positive terminal of the supply voltage.
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