CN201199669Y

CN201199669Y - Control circuit board for frequency converter

Info

Publication number: CN201199669Y
Application number: CNU2008201147272U
Authority: CN
Inventors: 卫三民; 苏位峰; 黄小光; 郭伟彰; 张和平; 李发海
Original assignee: BEIJING HOP HUAQING ELECTRIC TECHNOLOGY Co Ltd
Current assignee: Beijing XD Hopelec Technology Co., Ltd.
Priority date: 2008-05-13
Filing date: 2008-05-13
Publication date: 2009-02-25
Anticipated expiration: 2018-05-13

Abstract

The utility model discloses a control circuit board of a frequency converter, which comprises a first DSP for connecting a peripheral interface and a second DSP for core operation control; communication is carried out between the first DSP and the second DSP by connecting an FPGA; the FPGA is used for processing the control word of the second DSP and is connected with at least more than one PWM interfaces; the peripheral interface is a CAN bus interface, an RS485/RS323 interface, an analog quantity input/output interface or/and a digital quantity input/output interface; and the first DSP is also connected with one of the PWM interfaces. As the processing operation is respectively carried out by adopting the double DSPs and the FPGA, the processing speed is improved greatly compared with the single DSP; and the function expansion on each chip can not influence other chips, thereby facilitating the function upgrade.

Description

A kind of control circuit board of frequency converter

Technical field

The utility model relates to circuit board, is meant a kind of control circuit board of frequency converter especially.

Background technology

Along with the development of industrial control technology, to based on the proposition of the motor debugging apparatus of frequency converter more and more higher specification requirement, comprise high performance of control technology and high reliability.Various in the market frequency converter products are difficult to meet the demands, and main cause is because the control chip of core control circuit plate still adopts 16 single-chip microcomputers (even 8 single-chip microcomputers), single DSP (digital signal processor) etc.Single dsp chip has shortcomings such as arithmetic speed is slow, efficient is low, memory space is little, development sequence versatility difference.Along with the raising of market demands, the especially requirement of aspects such as high-performance, efficient, energy-conservation, complicated technology adopts single-chip microcomputer or single DSP to be difficult to satisfy the specification requirement of motor speed control device; And all controlled function are finished by single DSP, have limited the function development of circuit board.

The utility model content

In view of this, the utility model is to provide a kind of control circuit board of frequency converter, concentrates on single DSP, limitation functional development, the problem that arithmetic speed is slow to solve foregoing circuit plate controlled function.

For addressing the above problem, the utility model provides a kind of control circuit board of frequency converter, comprising:

A DSP who connects peripheral interface, the 2nd DSP of its main operational control, by connecting FPGA communication, FPGA handles the control word of the 2nd DSP and connects more than one at least pulse width modulation (PWM) interface between a DSP, the 2nd DSP.

Preferably, described peripheral interface is that CAN bus interface, RS485/RS232 interface, analog quantity input/output interface are or/and the digital quantity input/output interface.

Preferably, the quantity of described FPGA is one or two.

Preferably, a described DSP also connects in the PWM interface one.

Circuit board in the present embodiment, a DSP handles the control of peripheral interface circuit, and handles simple control signal and send by the PWM interface that connects; The 2nd DSP carries out the s operation control of algorithm and is connected with a DSP by FPGA, FPGA sends by the PWM that connects after with the control word computing of the 2nd DSP, owing to adopt two DSP and FPGA to handle computing respectively, the more single DSP of processing speed compares, speed improves a lot, and the expansion of the function on each chip does not influence other chip, is convenient to function upgrading.

Description of drawings

Fig. 1 is the structure chart of embodiment.

Embodiment

For clearly demonstrating the technical scheme in the utility model, provide preferred embodiment below and be described with reference to the accompanying drawings.

Referring to Fig. 1, Fig. 1 is the structure chart among the embodiment, and control circuit board adopts 2 dsp chips (digital signal processor), a DSP (being DSP1) and the 2nd DSP (being DSP2) and fpga chip.DSP1, DSP2 connect by FPGA and communicate.

Wherein, DSP1 mainly is responsible for the operation logic processing of frequency converter, the processing of peripheral interface etc.; The processing of system when DSP2 mainly is responsible for core control algolithm, the fault of frequency converter, calculating that power device drives required drive controlling word and transmission etc.

FPGA mainly comprises 2 partial functions, can adopt a slice, also can adopt two, when adopting a slice, can logically be divided into 2 parts.Be divided into zone 1 and zone 2, the communication of DSP1 and DSP2 is realized in zone 1, and guarantees that communication can not conflict; Realize calculating and processing from the control word of DSP2 in zone 2.

The peripheral interface that DSP1 connects comprises CAN bus interface, RS485/RS232 interface, special-purpose AI (analog quantity input)/AO (output) interface, special-purpose DI (digital quantity input)/DO (output) interface, also can connect other serial line interface as required.

The drive signal special purpose interface quantity of circuit board can be provided with as required, comprises 4 in an embodiment, and promptly PWM interface 1, PWM interface 2, PWM interface 3, PWM interface 4 all can be used as the used PWM of motor-driven (pulse width modulation) output interface.Wherein, in the PWM interface 1 control signal from DSP1 or from FPGA; The interface signal of PWM interface 2, PWM interface 3, PWM interface 4 is all from FPGA.

When control signal is fairly simple, can be directly handle the back and send by PWM1 by DSP1, computing if desired, then DSP2 sends by PWM interface 2, PWM interface 3, the PWM interface 4 that connects after by FPGA calculation process control word.

Each chip and interface can raise in the position and put in order among Fig. 1, but do not influence the operate as normal of entire circuit plate.

Circuit board in the present embodiment, a DSP handles the control of peripheral interface circuit, and handles simple control signal and send by the PWM that connects; The 2nd DSP carries out the s operation control of algorithm and is connected with a DSP by FPGA, FPGA sends by the PWM that connects after with the control word computing of the 2nd DSP, owing to adopt two DSP and FPGA to handle computing respectively, the more single DSP of processing speed compares, speed improves a lot, and the expansion of the function on each chip does not influence other chip, is convenient to function upgrading.

For the control circuit board of institute's elaboration frequency converter among each embodiment of the utility model, all within spirit of the present utility model and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection range of the present utility model.

Claims

1. the control circuit board of a frequency converter, it is characterized in that, comprise: a DSP who connects peripheral interface, the 2nd DSP of its main operational control, by connecting FPGA communication, FPGA handles the control word of the 2nd DSP and connects more than one at least pulse width modulation (PWM) interface between the one DSP, the 2nd DSP.

2. the control circuit board of a kind of frequency converter according to claim 1 is characterized in that, described peripheral interface is that CAN bus interface, RS485/RS232 interface, analog quantity input/output interface are or/and the digital quantity input/output interface.

3. the control circuit board of a kind of frequency converter according to claim 1 is characterized in that, the quantity of described FPGA is one or two.

4. the control circuit board of a kind of frequency converter according to claim 1 is characterized in that, a described DSP also connects in the PWM interface.