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工业用传动器

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文件
工具与软件
解决方案
电机在多种工业环境中大量采用,以执行各种任务和功能,如带动轴转动或驱动泵和风扇。根据任务概述和控制技术,可使用各种类型的电机,包括通用、有刷或无刷直流电机以及单相和三相感应电机。由电机和相关驱动电路(通常是指驱动器或逆变器)构成的整个机电系统的性能取决于电机控制技术,因为这是实现精确的速度、扭矩和位置控制的决定性因素。 ST提供广泛的8位STM8和32位STM32微控制器,包括IGBT和功率MOSFET以及集成电源模块(IPM)在内的各种功率分立器件,可帮助构建功率范围为几瓦到几十千瓦的高效功率级。 此外,ST还提供广泛的高性能运算放大器和比较器、开关和线性调节器以及MEMS惯性和环境传感器,以实现预测性维护,并提供全面的软件和硬件评估工具,以帮助缩短开发时间和成本。 Read more

Explore 工业用传动器 applications

Motor control in industrial applications

Industrial drive applications need to take into account the load on the motor, speed, acceleration, deceleration and duty cycle of the motor. These criteria are used to determine the horsepower and torque requirements. The control of the motor speed and position of the rotor also need to be considered when deciding whether to use constant or variable horsepower. 

Variable horsepower / Constant torque 

For example, variable horsepower applications with constant torque include gear pumps, cranes and drives for conveyor belts. These often use a constant-speed AC or DC electric motor as the load is constant. 

Constant horsepower / Variable torque 

A constant horsepower drive with variable torque often uses a DC or servo motor, or an AC motor with a closed-loop control. These can be used for applications such as unwinding and rewinding in roll-to-roll machines. 

Variable horsepower / Variable torque 

The third approach of variable horsepower and variable torque is often used in centrifugal pumps, fans, mixers and agitators. This is because in these industrial applications the load increases as the speed increases. Naturally a variable frequency drive (VFD) is a suitable solution for such a design. Linear motion drives and actuators often need accurate control of the position of the rotor and stator, while presses and tension control systems can need accurate torque control. These often use an industrial servo drive or stepper motor with a feedback control system to provide high performance.

Industrial drive application examples

Industrial drive application examples

There are many different applications for industrial motor control right across the factory floor. Automating industrial processes and connecting the drives up to the cloud are a key part of the move to the next generation of factory automation, often called Industry 4.0. These applications can vary from fans to pumps and from servo drives to linear motors. 

AC Drives

An AC drive often uses a single-phase induction motor or three-phase brushless motor with a frequency controller to handle the speed and torque. Control methods such as variable-frequency drive (VFD) or field-oriented control (FOC) can be used, and there are also poly-phase motors that use multiple-phase signals for more accurate control of the drive. 

Fans

Fans are of course widely used for ventilation, cooling and fume extraction across a wide range of applications on the factory floor. The mechanical configuration such as the axial, centrifugal and tangential air flow and the size and shape of the blades must be carefully considered, and this leads to the selection of a particular motor. This can be a brushed or brushless DC motor or a single- or three-phase AC induction motor depending on the size of the blades and the speed at which they need to rotate. 

Forklift

Electric forklifts use industrial drives in several areas, from driving the wheels to driving the hydraulic pumps that lift the heavy cargo. The powertrain and the hydraulic actuators typically use a permanent-magnet DC motor (PMDC) controlled by high-power low-voltage inverters. 

Pumps 

Pumps can be found in many industrial environments and depending on the application, the mechanical configuration, size and shape must be carefully selected. Equally, the motor type – whether universal, brushed or brushless DC motor or a single- or three-phase induction motor – and the associated motor drive need to be selected to achieve the overall performance required by the system. 

Servo Drives 

Industrial servo drives are used to provide the maximum accuracy for a motor's acceleration, speed and position. They are often used in robotics applications where accurate placement is needed at high speed, or where accuracy is needed such as lens autofocus control or antenna positioning. These also make use of sophisticated feedback control loops around a three-phase induction motor drive or BLDC motor.

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