One-master-driving-two system of industrial frequency transformer realized on basis of digital signal processor (DSP)

A digital signal and processor technology, applied in control systems, electrical components, control of multiple AC motors, etc., can solve the problems of unfavorable mass production and high cost

Inactive Publication Date: 2008-11-19
BEIJING BEIYAN ELECTRONICS TECH
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Problems solved by technology

However, the cost of a CPU with 12 channels of PWM signals (driving two three-phase asynchronous motors) is often very expensive, which is not conducive to mass production.

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  • One-master-driving-two system of industrial frequency transformer realized on basis of digital signal processor (DSP)
  • One-master-driving-two system of industrial frequency transformer realized on basis of digital signal processor (DSP)

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Embodiment Construction

[0016] Hereinafter, implementation modes of the present invention will be described with reference to the drawings.

[0017] The digital signal processor (DSP) that the present invention adopts is TMS320F28015PZAPZA, and this DSP itself has six PWM generation ports, and each PWM port can arbitrarily generate required PWM waves. Through the three PWM ports, six channels of PWM waves can be generated by connecting peripheral hardware circuits, thereby generating 12 channels of PWM waves required to control two three-phase asynchronous motors at the same time.

[0018] An inverter generally has 6 switching devices, and each phase output occupies 2 switching devices, which are called the upper bridge and the lower bridge of the corresponding phase, and the 3-phase output occupies a total of 6 switching devices. At the same time, the upper bridge and the lower bridge cannot be turned on at the same time. In the circuit, the transmission of the signal has a certain delay. As a resu...

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Abstract

The invention provides a low cost industry inverter system based on a TMS320F28015PZA DSP from Texas Instrument, namely, use one main control chip DSP to control two three-phase asynchronous motors at the same time. One TMS320F28015PZA DSP main control chip cooperated by the surrounding hardware circuit is used to generate 12 channels of PWM (Pulse Width Modulation) wave which can control 12 IGBT tubes, thus the circuit can generate two three-phase electric signal outputs. The low cost industry inverter system of the invention aims to use one inverter to control two three-phase asynchronous motors at the same time, thereby saving one DSP main control chip, reducing the equipment volume and effectively reducing the cost; meanwhile, the low cost industry inverter system of the invention greatly increases the reliability and stability of the control system.

Description

technical field [0001] The invention relates to a one-to-two (or one-to-many) system suitable for controlling two three-phase asynchronous motors at the same time by using one frequency converter in the field of industrial automation control. This system is based on Texas Instruments (hereinafter referred to as TI) digital signal processor (DSP) TMS320F28015PZA (on-chip resource is 6 PWM waves), cooperates with peripheral hardware circuits to generate 12 PWM waves, and controls 12 IGBT tubes , so as to generate two three-phase electrical outputs, the purpose is to realize a DSP main control chip to control two three-phase asynchronous motors at the same time in a low-cost manner, thereby effectively reducing equipment costs and improving system reliability and stability. Background technique [0002] At present, industrial inverters generally adopt a one-to-one circuit topology, that is, a DSP main control chip generates six PWM (Pulse Width Modulation) waves to control the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P27/04H02P27/08H02P5/74
Inventor 戴天芳张龙
Owner BEIJING BEIYAN ELECTRONICS TECH
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