A kind of permagnetic synchronous motor driving control system
Technical field
The present invention relates to a kind of permagnetic synchronous motor (PMSM) driving control system.
Background technology
Permagnetic synchronous motor is able to extensive use, because its speed-regulating range width, torque fluctuations is little, and response speed is fast, and peak torque is high, and overload capacity is strong, and advantage such as reliable.Especially in the attitude control of Aero-Space inertia actuator, robot etc. motor performance and control precision are required to come into one's own more than higher occasion.
Therefore, increase day by day for the requirement of Control of PMSM system.Yet, the present most complex design of some control system, cost is higher, and these control system of enterprise application often need pay through the nose.
Summary of the invention
The objective of the invention is to overcome the defective of prior art and a kind of permagnetic synchronous motor driving control system is provided, this control system is simple in structure, and is with low cost, has higher actual application value.
The technical scheme that realizes above-mentioned purpose is:
A kind of permagnetic synchronous motor driving control system; Connect a host computer; Said driving control system comprises digital signal processor, isolated location, drive circuit, three-phase full-controlled rectifier bridge and the permagnetic synchronous motor (PMSM) that connects successively; And interface circuit, current measurement circuit, tachometric survey circuit and A/D converter (mould/number), wherein:
Said current measurement circuit and A/D converter are connected in turn between said permagnetic synchronous motor and the digital signal processor;
Said tachometric survey circuit is connected between said permagnetic synchronous motor and the digital signal processor;
Said digital signal processor connects said host computer through said interface circuit;
Said digital signal processor sends PWM (pulse width modulation) control signal, and takes over said isolated location and be transferred to said drive circuit;
Said drive circuit drives said three-phase full-controlled rectifier bridge and controls said permagnetic synchronous motor according to the pwm control signal that receives;
Said current measurement circuit is gathered the current signal of said permagnetic synchronous motor, converts digital signal to through said A/D converter, and is transferred to said digital signal processor;
Said tachometric survey circuit is gathered the rotating speed of said permagnetic synchronous motor, and sends rotational speed pulse signal and give said digital signal processor.
Above-mentioned permagnetic synchronous motor driving control system, wherein, said driving control system comprises that also one is connected the protective circuit between said digital signal processor and the three-phase full-controlled rectifier bridge.
The invention has the beneficial effects as follows: the present invention is simple in structure, and is with low cost, has higher actual application value; Simultaneously, the present invention adopts the space vector pulse width modulation technology, and provides protective circuit, has further improved using value of the present invention.
Description of drawings
Fig. 1 is the structural representation of permagnetic synchronous motor driving control system of the present invention;
Fig. 2 is the structural representation of three-phase full-controlled rectifier bridge of the present invention.
Embodiment
To combine accompanying drawing that the present invention is described further below.
See also Fig. 1, permagnetic synchronous motor driving control system of the present invention connects host computer 10, and mutual each other through this host computer 10 and said driving control system realized the control to permagnetic synchronous motor 5.In the present embodiment, host computer 10 is computer or industrial control equipment.
Said driving control system comprises digital signal processor 1, isolated location 2, drive circuit 3, three-phase full-controlled rectifier bridge 4 and the permagnetic synchronous motor 5 that connects successively; And interface circuit 6, current measurement circuit 7, tachometric survey circuit 8 and A/D converter 9, wherein: current measurement circuit 7 and A/D converter 9 are connected in turn between permagnetic synchronous motor 5 and the digital signal processor 1; Tachometric survey circuit 8 is connected between permagnetic synchronous motor 5 and the digital signal processor 1; Digital signal processor 1 connects host computer 10 through interface circuit 6;
The driven strategy works of digital signal processor 1 adopts the space vector pulse width modulation technology, and the pwm control signal that digital signal processor 1 sends is taken over isolated location 2 and is transferred to drive circuit 3;
Drive circuit 3 drives the control pin of thyristor in the three-phase full-controlled rectifier bridge 4 according to the pwm control signal that receives, and realizes permagnetic synchronous motor 5;
Current measurement circuit 7 is gathered the current signal of permagnetic synchronous motor 5, and this current signal is transferred to digital signal processor 1 after A/D converter 9 converts digital signal to;
Tachometric survey circuit 8 is gathered the rotating speed of permagnetic synchronous motor 5, and sends rotational speed pulse signal and give digital signal processor 1;
Digital signal processor 1 is mutual each other with host computer 10, through the accurate control figure signal processor 1 of host computer 10.
Said driving control system comprises that also one is connected the protective circuit 11 between digital signal processor 1 and the three-phase full-controlled rectifier bridge 4, realizes the protection to whole driving control system.
See also Fig. 2, be the structural representation of three-phase full-controlled rectifier bridge 4.In the present embodiment, to select model for use be DSP (Digital Signal Processing) chip of TMS320LF2406A to digital signal processor 1; Miscellaneous part all adopts product commonly used and that be easy on the market purchase to realize.
Permagnetic synchronous motor driving control system of the present invention and host computer 10 cooperatively interact, and realize the accurate control to permagnetic synchronous motor 5, and the present invention are simple in structure, are easy to realization and with low cost, have higher actual application value.
Above embodiment only supplies to explain the present invention's usefulness; But not limitation of the present invention; The technical staff in relevant technologies field under the situation that does not break away from the spirit and scope of the present invention, can also make various conversion or modification; Therefore all technical schemes that are equal to also should belong to category of the present invention, should be limited each claim.