阅读说明：本技术 一种交流调速控制系统 (Alternating current speed regulation control system ) 是由 陈灵峰 于 2020-06-07 设计创作，主要内容包括：本发明属于交流调速控制技术领域,尤其为一种交流调速控制系统,包括计算机、DSP控制器、光耦隔离器、第一逆变电路、第二逆变电路、交流异步电机和接口转换电路,计算机、DSP控制器、光耦隔离器、第一逆变电路、第二逆变电路、交流异步电机和接口转换电路依次电性连接在一起,交流异步电机和接口转换电路电性连接在一起。本系统电路部分结构简单,成本低廉、且具备电路保护功能,提高了电路的安全性和可靠性。(The invention belongs to the technical field of alternating current speed regulation control, and particularly relates to an alternating current speed regulation control system which comprises a computer, a DSP (digital signal processor) controller, an optical coupler isolator, a first inverter circuit, a second inverter circuit, an alternating current asynchronous motor and an interface conversion circuit, wherein the computer, the DSP controller, the optical coupler isolator, the first inverter circuit, the second inverter circuit, the alternating current asynchronous motor and the interface conversion circuit are sequentially and electrically connected together, and the alternating current asynchronous motor and the interface conversion circuit are electrically connected together. The circuit part of the system has simple structure and low cost, has the circuit protection function, and improves the safety and the reliability of the circuit.)

1. The utility model provides an exchange speed governing control system, includes computer, DSP controller, opto-coupler isolator, first inverter circuit, second inverter circuit, exchanges asynchronous machine and interface converting circuit, its characterized in that: the computer, the DSP controller, the optical coupling isolator, the first inverter circuit, the second inverter circuit, the alternating current asynchronous motor and the interface conversion circuit are electrically connected together in sequence, and the alternating current asynchronous motor and the interface conversion circuit are electrically connected together.

2. An ac speed governing control system as set forth in claim 1, wherein: the DSP controller adopts a TMS320F2806 chip.

3. An ac speed governing control system as set forth in claim 1, wherein: the first inverter circuit and the second inverter circuit comprise a first triode Q1, a second triode Q2, a third triode Q3, a fourth triode Q4, a fifth triode Q5, a sixth triode Q6, a seventh triode Q7, an eighth triode Q8, a toroidal transformer T, a first diode D1, a second diode D2, a first resistor R1, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4 and a fifth capacitor C5, wherein the anode of the first diode D5 and the base of the first triode Q5 are connected with the first alternating square wave A, the collector of the first triode Q5 is grounded, the emitter of the first triode Q5 is respectively connected with the cathode of the first diode D5, one end of the third capacitor C5, one end of the fourth capacitor C5 and one end of the fifth capacitor C5, the other end of the third capacitor C5 is connected with the base of the third triode Q5 and the base of the fourth triode Q5, the other end of the fifth capacitor C5 is connected to the base of the fifth transistor Q5, the collector of the third transistor Q3, the collector of the fourth transistor Q4 and the collector of the fifth transistor Q5 are all grounded, the emitter of the third transistor Q3, the emitter of the fourth transistor Q4 and the emitter of the fifth transistor Q5 are respectively connected to one end of the second capacitor C2 and one end of the primary coil L1 of the toroidal transformer T, the other end of the second capacitor C2 is grounded, the middle node of the secondary coil L2 of the toroidal transformer T is grounded, and the emitter of the third transistor Q3 is connected to the emitter of the fifth transistor Q5 through the first resistor R1.

4. An ac speed regulation control system according to claim 2, wherein: the anode of the second diode D2 and the base of the second triode Q2 are both connected with the second alternating square wave B, the emitter of the second triode Q2 is respectively connected with the cathode of the second diode D2, the base of the sixth triode Q6, the base of the seventh triode Q7 and the base of the eighth triode Q8, the collector of the sixth triode Q6, the collector of the seventh triode Q7 and the collector of the third triode Q8 are both grounded, the emitter of the sixth triode Q6, the emitter of the seventh triode Q7 and the emitter of the eighth triode Q8 are respectively connected with one end of the first capacitor C12 and the other end of the primary coil L1 of the toroidal transformer T, the middle node of the toroidal transformer T is connected with the power supply VCC1, the other end of the first capacitor C1 is grounded, the resistance value of the first resistor R1 is 3.3K Ω, the capacitance value of the third capacitor C3 is 200PF, the capacitance value of the fourth capacitor C4 is 200PF, and the capacitance value of the fifth capacitor C5 is 200 PF.

5. An ac speed regulation control system according to claim 2, wherein: the first triode Q1, the second triode Q2, the third triode Q3, the fourth triode Q4, the fifth triode Q5, the sixth triode Q6, the seventh triode Q7 and the eighth triode Q8 are all PNP type triodes.

Technical Field

The invention relates to the technical field of alternating current speed regulation control, in particular to an alternating current speed regulation control system.

Background

With the rapid forward development and small-break maturity of power electronic technology, control technology, computer information technology and microelectronic technology, the interdigitation and interpenetration of different subject technologies, the technical revolution of the engineering field is initiated, the electric device controlled by an integrated chip can replace the original functions of certain mechanical parts and can also be endowed with a plurality of new functions, such as automatic detection, automatic information processing, automatic regulation and control, automatic diagnosis and protection and the like, the high-power semiconductor device is continuously miniaturized and has high performance, the alternating current frequency conversion technology is continuously innovated, the large-range smooth speed regulation of the alternating current motor becomes practical, the performance of the alternating current asynchronous motor after frequency conversion and speed regulation reaches the level which is not up and down to the speed regulation performance when the direct current motor is used for regulating the voltage, the DSP with high-speed operation and control capability and the introduction of an Intelligent Power Module (IPM) with high integration level, therefore, the control system of the alternating current asynchronous motor powered by the frequency converter is widely applied.

However, the conventional control system does not satisfy the speed change control and has high production cost, and therefore, an ac speed regulation control system is proposed.

Disclosure of Invention

The invention aims to solve the defects in the prior art and provides an alternating current speed regulation control system.

In order to achieve the purpose, the invention adopts the following technical scheme: the utility model provides an exchange speed governing control system, includes computer, DSP controller, opto-coupler isolator, first inverter circuit, second inverter circuit, alternating current asynchronous machine and interface conversion circuit, computer, DSP controller, opto-coupler isolator, first inverter circuit, second inverter circuit, alternating current asynchronous machine and interface conversion circuit be in the same place electric connection in proper order, alternating current asynchronous machine and interface conversion circuit electric connection are in the same place.

Preferably, the DSP controller uses a TMS320F2806 chip.

Preferably, the first inverter circuit and the second inverter circuit include a first transistor Q1, a second transistor Q2, a third transistor Q3, a fourth transistor Q4, a fifth transistor Q5, a sixth transistor Q6, a seventh transistor Q7, an eighth transistor Q8, a toroidal transformer T, a first diode D1, a second diode D2, a first resistor R1, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4 and a fifth capacitor C5, wherein an anode of the first diode D5 and a base of the first transistor Q5 are connected to the first alternated square wave a, a collector of the first transistor Q5 is grounded, an emitter of the first transistor Q5 is respectively connected to a cathode of the first diode D5, one end of the third capacitor C5, one end of the fourth capacitor C5 and one end of the fifth capacitor C5, the other end of the third capacitor C5 is connected to the base of the first transistor Q5 and the base of the fourth transistor Q5, the other end of the fifth capacitor C5 is connected to the base of the fifth transistor Q5, the collector of the third transistor Q3, the collector of the fourth transistor Q4 and the collector of the fifth transistor Q5 are all grounded, the emitter of the third transistor Q3, the emitter of the fourth transistor Q4 and the emitter of the fifth transistor Q5 are respectively connected to one end of the second capacitor C2 and one end of the primary coil L1 of the toroidal transformer T, the other end of the second capacitor C2 is grounded, the middle node of the secondary coil L2 of the toroidal transformer T is grounded, and the emitter of the third transistor Q3 is connected to the emitter of the fifth transistor Q5 through the first resistor R1.

Preferably, the anode of the second diode D2 and the base of the second transistor Q2 are both connected to the second alternating square wave B, the emitter of the second transistor Q2 is connected to the cathode of the second diode D2, the base of the sixth transistor Q6, the base of the seventh transistor Q7 and the base of the eighth transistor Q8, the collector of the sixth transistor Q6, the collector of the seventh transistor Q7 and the collector of the third transistor Q8 are all grounded, the emitter of the sixth transistor Q6, the emitter of the seventh transistor Q7 and the emitter of the eighth transistor Q8 are all connected to one end of the first capacitor C12 and the other end of the primary coil L1 of the toroidal transformer T, the middle node of the toroidal transformer T is connected to the power supply VCC1, the other end of the first capacitor C1 is grounded, the resistance of the first resistor R1 is 3K Ω, the capacitance of the third capacitor C3 is 200PF, and the capacitance of the fourth capacitor C4 is 200PF, the capacitance value of the fifth capacitor C5 is 200 PF.

Preferably, the first transistor Q1, the second transistor Q2, the third transistor Q3, the fourth transistor Q4, the fifth transistor Q5, the sixth transistor Q6, the seventh transistor Q7, and the eighth transistor Q8 are all PNP transistors.

Compared with the prior art, the invention has the beneficial effects that: TMS320F2806 is equipped with A/D conversion peripheral, uses Hall current sensor of Lyme company to detect two-phase current in three phases of motor, uses resistance voltage-dividing method to detect bus voltage of inverter, interface conversion circuit makes level translation and amplification of electric signal collected by sensor, and sends it into A/D port of F2806, and after making correspondent operation treatment, it utilizes space vector algorithm to produce 3 pairs of SVPWM pulse signals whose difference is 120 deg., and makes them implement action on PS21564 control input end (UP, VP, wP, uN, VN and WN) after making photoelectric isolation. The PS21564 drives the asynchronous motor, and the control of the variable-frequency speed control system of the asynchronous motor is realized by changing the output frequency, the inverter circuit further comprises a sixth capacitor C6, a seventh capacitor C7 and an eighth capacitor C8, wherein an emitter of a second triode Q2 is connected with a base of a sixth triode Q6 through the sixth capacitor C6, an emitter of a second triode Q2 is connected with a base of a seventh triode Q7 through the seventh capacitor C7, an emitter of a second triode Q2 is connected with a base of an eighth triode Q8 through the eighth capacitor C8, a capacitance value of the sixth capacitor C6 is 200PF, a capacitance value of the seventh capacitor C7 is 200PF, and a capacitance value of the eighth capacitor C8 is 200 PF. The sixth capacitor C6, the seventh capacitor C7, and the eighth capacitor C8 are all coupling capacitors, the sixth capacitor C6 is used to prevent interference between the second transistor Q2 and the sixth transistor Q6, the seventh capacitor C7 is used to prevent interference between the second transistor Q2 and the seventh transistor Q7, and the eighth capacitor C8 is used to prevent interference between the second transistor Q2 and the eighth transistor Q8, so as to further improve the safety and reliability of the circuit.

The circuit part of the system has simple structure and low cost, has the circuit protection function, and improves the safety and the reliability of the circuit.

Drawings

FIG. 1 is a schematic block diagram of the present invention;

fig. 2 is a circuit diagram of a first inverter circuit and a second inverter circuit according to the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-2, the present invention provides a technical solution: an alternating current speed regulation control system comprises a computer, a DSP controller, an optical coupler isolator, a first inverter circuit, a second inverter circuit, an alternating current asynchronous motor and an interface conversion circuit, wherein the computer, the DSP controller, the optical coupler isolator, the first inverter circuit, the second inverter circuit, the alternating current asynchronous motor and the interface conversion circuit are electrically connected together in sequence;

the DSP controller adopts a TMS320F2806 chip, the first inverter circuit and the second inverter circuit comprise a first triode Q1, a second triode Q2, a third triode Q3, a fourth triode Q4, a fifth triode Q5, a sixth triode Q6, a seventh triode Q7, an eighth triode Q8, a toroidal transformer T, a first diode D1, a second diode D2, a first resistor R1, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4 and a fifth capacitor C5, wherein the anode of the first diode D1 and the base of the first triode Q1 are connected with the first alternating square wave A, the collector of the first triode Q1 is grounded, the emitter of the first triode Q1 is respectively connected with the cathode of the first diode D1, one end of the third capacitor C3, one end of the fourth capacitor C4 and one end of the first capacitor C5, and the base of the first capacitor C395 3 is connected with the base of the first triode D3, the other end of the fourth capacitor C4 is connected to the base of the fourth transistor Q4, the other end of the fifth capacitor C5 is connected to the base of the fifth transistor Q5, the collector of the third transistor Q3, the collector of the fourth transistor Q4 and the collector of the fifth transistor Q5 are all grounded, the emitter of the third transistor Q3, the emitter of the fourth transistor Q4 and the emitter of the fifth transistor Q5 are respectively connected to one end of the second capacitor C2 and one end of the primary coil L1 of the toroidal transformer T, the other end of the second capacitor C2 is grounded, the middle node of the secondary coil L2 of the toroidal transformer T is grounded, the emitter of the third transistor Q3 is connected to the emitter of the fifth transistor Q5 through a first resistor R1, the anode of the second diode D2 and the base of the second transistor Q2 are both connected to the second alternant square wave, and the emitters of the second transistor Q2 are respectively connected to the cathode of the second diode D2, A base of the sixth triode Q6, a base of the seventh triode Q7 and a base of the eighth triode Q8 are all connected, a collector of the sixth triode Q6, a collector of the seventh triode Q7 and a collector of the third triode Q8 are all grounded, an emitter of the sixth triode Q6, an emitter of the seventh triode Q7 and an emitter of the eighth triode Q8 are respectively connected with one end of the first capacitor C12 and the other end of the primary coil L1 of the ring transformer T, the middle node of the ring transformer T is connected with the power supply 58vcc 23, the other end of the first capacitor C1 is grounded, a resistance value of the first resistor R1 is 3.3K Ω, a capacitance value of the third capacitor C3 is 200PF, a capacitance value of the fourth capacitor C4 is 200PF, a capacitance value of the fifth capacitor C9 is 200PF, the first triode Q1, the second triode Q2, the third triode Q3, the fourth triode Q4, the fifth triode Q5, the sixth capacitor Q6, the seventh triode Q8 and the eighth triode Q8, TMS320F2806 is equipped with A/D conversion peripheral, uses Hall current sensor of Lyme company to detect two-phase current in three phases of motor, uses resistance voltage-dividing method to detect bus voltage of inverter, interface conversion circuit makes level translation and amplification of electric signal collected by sensor, and sends it into A/D port of F2806, and after making correspondent operation treatment, it utilizes space vector algorithm to produce 3 pairs of SVPWM pulse signals whose difference is 120 deg., and makes them implement action on PS21564 control input end (UP, VP, wP, uN, VN and WN) after making photoelectric isolation. The PS21564 drives the asynchronous motor, and the control of the variable-frequency speed control system of the asynchronous motor is realized by changing the output frequency, the inverter circuit further comprises a sixth capacitor C6, a seventh capacitor C7 and an eighth capacitor C8, wherein an emitter of a second triode Q2 is connected with a base of a sixth triode Q6 through the sixth capacitor C6, an emitter of a second triode Q2 is connected with a base of a seventh triode Q7 through the seventh capacitor C7, an emitter of a second triode Q2 is connected with a base of an eighth triode Q8 through the eighth capacitor C8, a capacitance value of the sixth capacitor C6 is 200PF, a capacitance value of the seventh capacitor C7 is 200PF, and a capacitance value of the eighth capacitor C8 is 200 PF. The sixth capacitor C6, the seventh capacitor C7 and the eighth capacitor C8 are all coupling capacitors, the sixth capacitor C6 is used for preventing interference between the second triode Q2 and the sixth triode Q6, the seventh capacitor C7 is used for preventing interference between the second triode Q2 and the seventh triode Q7, and the eighth capacitor C8 is used for preventing interference between the second triode Q2 and the eighth triode Q8, so that the safety and reliability of the circuit are further improved.

The working principle is as follows: TMS320F2806 is equipped with A/D conversion peripheral, uses Hall current sensor of Lyme company to detect two-phase current in three phases of motor, uses resistance voltage-dividing method to detect bus voltage of inverter, interface conversion circuit makes level translation and amplification of electric signal collected by sensor, and sends it into A/D port of F2806, and after making correspondent operation treatment, it utilizes space vector algorithm to produce 3 pairs of SVPWM pulse signals whose difference is 120 deg., and makes them implement action on PS21564 control input end (UP, VP, wP, uN, VN and WN) after making photoelectric isolation. The PS21564 drives the asynchronous motor, and the control of the variable-frequency speed control system of the asynchronous motor is realized by changing the output frequency, the inverter circuit further comprises a sixth capacitor C6, a seventh capacitor C7 and an eighth capacitor C8, wherein an emitter of a second triode Q2 is connected with a base of a sixth triode Q6 through the sixth capacitor C6, an emitter of a second triode Q2 is connected with a base of a seventh triode Q7 through the seventh capacitor C7, an emitter of a second triode Q2 is connected with a base of an eighth triode Q8 through the eighth capacitor C8, a capacitance value of the sixth capacitor C6 is 200PF, a capacitance value of the seventh capacitor C7 is 200PF, and a capacitance value of the eighth capacitor C8 is 200 PF. The sixth capacitor C6, the seventh capacitor C7 and the eighth capacitor C8 are all coupling capacitors, the sixth capacitor C6 is used for preventing interference between the second triode Q2 and the sixth triode Q6, the seventh capacitor C7 is used for preventing interference between the second triode Q2 and the seventh triode Q7, and the eighth capacitor C8 is used for preventing interference between the second triode Q2 and the eighth triode Q8, so that the safety and reliability of the circuit are further improved.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.