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交流驱动器

概述
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工具与软件
硬件评估工具
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主要产品
交流驱动器是一种变频器,用于采用专门开发的控制方法(如可变频率驱动(VFD)或磁场定向控制(FOC)来控制电机(通常是三相交流感应或三相BLDC电机)速度和扭矩。 我们的产品包括广泛的8位STM8和32位STM32微控制器以及各种功率分立器件(包括IGBT和功率MOSFET、用于实现更高功率效率的碳化硅(SiC)二极管,以及集成电源模块(IPM)),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。 阅读更多

Our products and solutions

Our offering includes an extensive range of STM8 8-bit microcontrollers, STM32 32-bit microcontrollers, STM32MPx microprocessors (MPUs), power discretes, such as IGBTsPower MOSFETs and diodes, including Silicon-Carbide (SiC)devices for higher power efficiency, as well as Intelligent Power Modules (IPM SLLIMM™) and plastic power modules(ACEPACK™ range) to help build scalable, high-efficiency power stages with a power ranging up to tens of kilowatts.

Additionally, ST provides an extensive portfolio of high-performance operational amplifiers and comparators, switching and linear regulators and MEMS inertial and environmental sensors, Machine Learning Inertial Measurement Units – for remote sensing (i.e. for closed loop control, as well as condition monitoring or predictive maintenance) – and a comprehensive range of software and hardware evaluation tools to help reduce development time and cost.

Variable Frequency Drive (VFD) working principles

A variable frequency drive (VFD) consists of three main elements: an AC motor(usually a 3-phase induction motor), adrive controller and a user interface

The AC motor 

The AC induction motor often has a fixed speed so that the controller is relatively simple. This supplies voltage in three phases in a sequence into the coils of a stator in the motor, creating a rotating magnetic field. This induces an electric field to drive the rotor. 

The AC drive controller 

A typical industrial AC drive controller has three half-bridges, each delivering a sine-wave voltage to the stator. For the adjustable frequency, scalar algorithms are used in the controllers to vary the voltage to determine the frequency of the phases, or volts/hertz. The use of more sophisticated algorithms is becoming increasingly popular in high-end motors. Examples include vector control or field-oriented control (FOC) that are used to control the frequency of multiple phases. 

Adding in variable speed drives increases the complexity of the control algorithms. 

These drives also need the controller to provide a soft-start capability to reduce the load on the motor and the current surge of the motor during start-up. This is essential to reduce the stress on the motor and provide the maximum lifetime for the industrial drive on the factory floor. 

This is because the motors can have inrush currents seven to ten times that of the operational current, and the required torque can be three times higher at the start compared to when in operation. A digital soft-starter controller continuously monitors the voltage during start-up, adjusting to the load of the motor to provide smooth acceleration, speed and torque control. This is used to start and stop the AC motor drive system, reducing the stress on the drive. This also puts less load on the power supply, reducing the energy consumption and leading to significant cost savings

The AC drive interface 

The interface to the AC drive can be via a number of different connections. These can vary from a 4 to 20 mA current loop, a 0 to 10 VDC voltage signal or a remote connection via Ethernet or a wireless communication link.

AC drives in industrial applications

AC drives in industrial applications

The advent of powerful semiconductor controllers has enabled a new class of industrial drives to be developed around AC electric motors, specifically using a variable-frequency drive (VFD). This has allowed many applications that previously required a DC motor with pulse width modulation for the accuracy to use more power-efficient three-phase AC induction motors instead. These can deliver significant energy savingsacross an industry, especially when combined with wireless sensing and control links as part of the Industrial Internet of Things (IIoT) delivers significant cost savings across the factory floor, while boosting productivity. 

Industrial AC drives are seen across the factory floor, from powering a fan or a hydraulic pump to a stepper motor controlling a pick and place head or a robotic arm requiring fine control. The load demands of roll-to-roll manufacturing systems, whether that is web-offset printing or thin film panels of all descriptions need careful speed control, and industrial drives are key to ensuring that the speed of all the rollers is closely aligned, requiring both high speed and high accuracy. 

Application examples 

Pick-and-place machines require both speed, accuracy and positioning. The faster a placement head can move to the exact location within a fraction of a millimeter, the quicker an entire printed circuit board or piece of equipment can be produced. 

High-torque applications such as conveyor belts need to be able to handle heavy loads and light loads within a short time, requiring fine torque control to be efficient and effective. These also need to be highly reliable, as a conveyor shutting down hits the productivity of the entire factory. 

All these applications can be addressed with the latest AC industrial drive technology. The AC induction motors are more reliable and energy efficient than the DC versions, and the latest semiconductor devices provide the levels of control that are required in industrial applications. 

Linking industrial drives to the cloud opens up a world of opportunities as part of the industrial IoT and Industry 4.0. Remote control and monitoring of the drives with predictive maintenance algorithms ensures that preventive maintenance can be carried out to avoid any stoppages before they occur. All of this delivers significant cost savings across the factory floor, while boosting productivity.

All tools & software

    • 产品型号
      状态
      描述
      类型
      供应商

      STSW-POWERSTUDIO

      批量生产

      功率器件的ST PowerStudio动态电热模拟软件

      评估工具软件 ST
      STSW-POWERSTUDIO

      描述:

      功率器件的ST PowerStudio动态电热模拟软件

All Hardware Evaluation Tools

    • 产品型号
      描述
      Core product
      工具类型
      供应商
      Sort by: part number

      EVALSTDRIVE601

      批量生产

      EVALSTRIVE601

      STDRIVE601 3-Phase Motors (PMSM, BLDC, ACIM) ST
      EVALSTDRIVE601
      批量生产

      EVALSTRIVE601

      STEVAL-IHM035V2

      批量生产

      三相高压逆变器电源板,用于FOC和标量电机控制,基于STGIPN3H60(SLLIMM™-nano)

      STGIPN3H60 3-Phase Motors (PMSM, BLDC, ACIM) ST
      STEVAL-IHM035V2
      批量生产

      三相高压逆变器电源板,用于FOC和标量电机控制,基于STGIPN3H60(SLLIMM™-nano)

      STEVAL-IHM036V1

      批量生产

      低功耗电机控制板,拥有SLLIMM™ STGIPN3H60和MCU STM32F100C6T6B

      STGIPN3H60 3-Phase Motors (PMSM, BLDC, ACIM) -
      STEVAL-IHM036V1
      批量生产

      低功耗电机控制板,拥有SLLIMM™ STGIPN3H60和MCU STM32F100C6T6B

      STEVAL-IHM040V1

      NRND

      基于STM32和SLLIMM nano™的BLDC/PMSM驱动器演示板

      - 3-Phase Motors (PMSM, BLDC, ACIM) -
      STEVAL-IHM040V1
      NRND

      基于STM32和SLLIMM nano™的BLDC/PMSM驱动器演示板

      STEVAL-IPM05F

      批量生产

      500 W电机控制电源板,基于STGIF5CH60TS-L SLLIMM™第2系列IPM

      STGIF5CH60TS-L 3-Phase Motors (PMSM, BLDC, ACIM) ST
      STEVAL-IPM05F
      批量生产

      500 W电机控制电源板,基于STGIF5CH60TS-L SLLIMM™第2系列IPM