CN204408229U - A kind of control device for brushless dual-feed motor - Google Patents
A kind of control device for brushless dual-feed motor Download PDFInfo
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- CN204408229U CN204408229U CN201420810423.5U CN201420810423U CN204408229U CN 204408229 U CN204408229 U CN 204408229U CN 201420810423 U CN201420810423 U CN 201420810423U CN 204408229 U CN204408229 U CN 204408229U
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Abstract
For a control device for brushless dual-feed motor, comprise master controller, grid side pwm converter, motor side pwm converter, direct current bus voltage detecting circuit, grid side voltage/current detection circuit, motor side voltage/current detection circuit, speed/torque transducer, A/D converter and man-machine interface; Grid side voltage/current detection circuit connects master controller through grid side A/D converter; Motor side voltage/current detection circuit connects master controller through motor side A/D converter; The input of motor side A/D converter also connects speed/torque transducer and direct current bus voltage detecting circuit; The output of master controller is connected with grid side pwm converter and motor side pwm converter respectively through optical coupling isolation circuit.The utility model, by the control to brushless dual-feed motor controlled winding voltage, electric current, frequency and phase sequence, realizes controlling the rotating speed of brushless dual-feed motor.
Description
Technical field
The utility model relates to motor control technology field, particularly a kind of control device of brushless dual-feed motor.
Background technology
In recent years, frequency conversion timing AC motor is widely applied at industrial circle.At present, what use in AC speed regulating is cage type induction motor, wound induction motor and double feedback electric engine etc. mostly, these motors have respective shortcomings and limitations in the application, such as: the expansion of capacity makes the frequency conversion capacity of squirrel cage motor constantly rise, and adds the cost of frequency converter; The brush structure of double feedback electric engine runs safe not, needs periodic maintenance etc.
Brushless dual-feed motor is a kind of New-type electric machine that development in recent years is got up, and brushless dual-feed motor, under can carrying out the prerequisite of variable frequency regulating speed control, overcomes the problems referred to above, is widely applied in increasing occasion.Brushless dual-feed motor has two cover three-phase symmetrical stator winding and a rotor windings, and wherein stator winding is a set of is power winding, is directly powered by electrical network; Another set of is controlled winding, is powered after commutation inversion by electrical network three-phase alternating current.The rotor that brushless dual-feed motor general principle is through particular design makes two cover stator winding produce the rotating magnetic field Indirect Interaction of different number of pole-pairs, and control can be carried out to realize energy transferring to its interaction, have the Common advantages of asynchronous machine and synchronous machine concurrently, the feature such as there is rotating speed and power factor is adjustable, frequency inverter capacity is little.Because brushless dual-feed motor eliminates rotor-side brush, therefore improve the mechanical stability of motor, reduce maintenance cost.
Because brushless dual-feed motor is transformed by two different progression induction machines series connection, its flow of power relation can be analyzed with reference to induction machine, but because it has two cover stator winding, therefore when it is in steady operational status, the magnetic field set up by two cover stator winding in the rotor can produce coupling, therefore acquires a certain degree of difficulty to the power control tool of brushless dual-feed motor compared to common AC induction motor.Existing brushless dual-feed motor is that the voltage magnitude by controlling stator winding end carrys out regulating power factor, when making brushless dual-feed motor be in generating state, reduces the quality of electrical grid transmission electric energy.
Utility model content
The utility model, for the deficiencies in the prior art, provides a kind of control device of brushless dual-feed motor, with by the control to brushless dual-feed motor controlled winding voltage, electric current, frequency and phase sequence, realizes controlling the rotating speed of brushless dual-feed motor.
For solving the problems of the technologies described above, technical solution adopted in the utility model is as follows.
A kind of control device for brushless dual-feed motor, comprise master controller, grid side pwm converter, motor side pwm converter, direct current bus voltage detecting circuit, grid side voltage/current detection circuit, motor side voltage/current detection circuit, speed/torque transducer, A/D converter and man-machine interface, described grid side pwm converter is arranged on three-phase alternating current electrical network side, motor side pwm converter is arranged on motor side, is DC bus between grid side pwm converter and motor side pwm converter; Described grid side voltage/current detection circuit is for gathering line voltage and electric current, and the output of grid side voltage/current detection circuit connects the input of grid side A/D converter, and the output of grid side A/D converter connects the input of master controller; Described motor side voltage/current detection circuit is for gathering electric moter voltage and electric current, and the output of motor side voltage/current detection circuit connects the input of motor side A/D converter, and the output of motor side A/D converter connects the input of master controller; The input of described motor side A/D converter also connects and is arranged on the speed/torque transducer between motor and load and the direct current bus voltage detecting circuit for detecting DC bus-bar voltage; The output of described master controller is connected with the control end of grid side pwm converter and motor side pwm converter respectively through optical coupling isolation circuit.
The concrete structure of grid side voltage/current detection circuit described in the utility model is: described grid side voltage/current detection circuit comprises voltage transformer, current transformer, grid side voltage amplifier circuit and grid side current amplification circuit, voltage transformer summation current transformer is arranged in three-phase alternating current electrical network, the output of voltage transformer connects the input of grid side voltage amplifier circuit, and the output of grid side voltage amplifier circuit connects the input of grid side A/D converter; The output of current transformer connects the input of grid side current amplification circuit, and the output of grid side current amplification circuit connects the input of grid side A/D converter.
The above-mentioned control device for brushless dual-feed motor, described direct current bus voltage detecting circuit comprises DC side Hall voltage transducer and direct voltage amplifying circuit, the output of DC side Hall voltage transducer connects the input of direct voltage amplifying circuit, and the output of direct voltage amplifying circuit connects the input of motor side A/D converter.
The above-mentioned control device for brushless dual-feed motor, described motor side voltage/current detection circuit comprises AC Hall voltage transducer, AC Hall current sensor, motor side voltage amplifier circuit and motor side current amplification circuit, AC Hall voltage transducer and AC Hall current sensor are arranged on motor side three-phase power line, the output of AC Hall voltage transducer connects the input of motor side voltage amplifier circuit, and the output of motor side voltage amplifier circuit connects the input of motor side A/D converter; The output of AC Hall current sensor connects the input of motor side current amplification circuit, and the output of motor side current amplification circuit connects the input of motor side A/D converter.
The above-mentioned control device for brushless dual-feed motor, described grid side pwm converter and motor side pwm converter adopt intelligent power control module IPM, and speed/torque transducer adopts rotary speed/torque transducer.
The above-mentioned control device for brushless dual-feed motor, comprises communication interface, and described communication interface adopts RS485 communication interface.
The above-mentioned control device for brushless dual-feed motor, described master controller adopts single-chip microcomputer.
Owing to have employed above technical scheme, the technological progress effect acquired by the utility model is as follows.
The utility model sends control command and controling parameters by man-machine interface to master controller, and by state when voltage/current detection circuit, the operation of speed/torque Sensor monitoring current motor, master controller is according to giving control command and the controling parameters of setting and current motor running state by optical coupling isolation circuit to grid side pwm converter, motor side pwm converter sending controling instruction, and realization is to the power output of motor and the control of rotating speed further.Pwm converter of the present utility model adopts intelligent power control module IPM to replace frequency converter, can reduce device volume, reduce costs; Man-machine interface shows in real time the state parameter in motor operation course and stores, and can inquire about historical data, simplifies start-up course, simple to operation.
Accompanying drawing explanation
Fig. 1 is structured flowchart of the present utility model;
Fig. 2 is the electrical schematic diagram of grid side voltage/current detection circuit described in the utility model;
Fig. 3 is the electrical schematic diagram of motor side voltage/current detection circuit described in the utility model, direct current bus voltage detecting circuit;
Fig. 4 is the electrical schematic diagram of optical coupling isolation circuit described in the utility model.
In figure, each label is expressed as: U1, master controller, U2 ~ U3, A/D converter, U4, photoelectrical coupler, IPM1 ~ IPM2, intelligent power control module, CT1 ~ CT3, current transformer, PT1 ~ PT3, voltage transformer, HV1 ~ HV2, Hall voltage transducer, HA1 ~ HA3, Hall current sensor, TS, speed/torque transducer, H1 ~ H12, optical coupling isolation circuit, FC1 ~ FC3, grid side current amplification circuit, FP1 ~ FP3, grid side voltage amplifier circuit, FHV1 direct current bus voltage detecting circuit, FHV2 ~ FHV3, motor side voltage amplifier circuit, FHA1 ~ FHA3, motor side current amplification circuit, BDFM, brushless dual-feed motor, TS, speed/torque transducer.
Ua, Ub, Uc are three-phase alternating current.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is further elaborated.
The utility model comprises master controller, grid side pwm converter, motor side pwm converter, direct current bus voltage detecting circuit, grid side voltage/current detection circuit, motor side voltage/current detection circuit, speed/torque transducer, grid side A/D converter, motor side A/D converter, optical coupling isolation circuit, communication interface and man-machine interface.
The controlled winding of brushless dual-feed motor is connected with electrical network through motor side pwm converter, DC bus, grid side pwm converter successively, and power winding is directly connected with electrical network.
Grid side pwm converter is arranged on three-phase alternating current electrical network side, for realizing voltage commutation function; Motor side pwm converter is arranged on motor side, for realizing voltage invert function; It is DC bus between grid side pwm converter and motor side pwm converter.In the present embodiment, grid side pwm converter and motor side pwm converter all adopt intelligent power control module IPM.
Grid side voltage/current detection circuit is for completing the collection to grid side voltage, electric current.The output of grid side voltage/current detection circuit connects the input of grid side A/D converter, and the output of grid side A/D converter connects the input of master controller.The grid side voltage analog signal of grid side voltage/current detection circuit collection, current analog signal are transferred to master controller after being converted to digital signal by grid side A/D converter.
In the utility model, grid side voltage/current detection circuit comprises voltage transformer, current transformer, grid side voltage amplifier circuit and grid side current amplification circuit, voltage transformer summation current transformer is arranged in three-phase alternating current electrical network, the output of voltage transformer connects the input of grid side voltage amplifier circuit, and the output of grid side voltage amplifier circuit connects the input of grid side A/D converter; The output of current transformer connects the input of grid side current amplification circuit, and the output of grid side current amplification circuit connects the input of grid side A/D converter.
Grid side voltage/current detection circuit in the present embodiment as shown in Figure 2, comprises voltage transformer pt 1 ~ PT3, Current Transmit 1 ~ CT3, grid side voltage amplifier circuit FP1 ~ FP3 and grid side current amplification circuit FC1 ~ FC3.
Grid side voltage amplifier circuit FP1 comprises operational amplifier A 1, diode D1, diode D2, resistance R1 and electric capacity C1, electric capacity C2.Two inputs of operational amplifier A 1 connect the output of voltage transformer pt 1, and the output of operational amplifier A 1 connects the input of grid side A/D converter U2; Operational amplifier is used for the grid side voltage signal of voltage transformer collection to amplify.In parallel and the Opposite direction connection of diode D1, diode D2 between two outputs of voltage transformer pt 1, for playing clamping action to the signal of voltage transformer collection.Between the electrode input end that the parallel circuit in series of resistance R1, electric capacity C1 and electric capacity C2 is connected to operational amplifier A 1 and output, resistance R1 is feedback resistance, and electric capacity C1 and electric capacity C2 strobes.The circuit theory of grid side voltage amplifier circuit FP2 with PT3 is identical with the circuit theory of grid side voltage amplifier circuit FP1.
Grid side current amplification circuit FC1 comprises operational amplifier A 2, diode D3, diode D4, resistance R2 and electric capacity C3.Two inputs of operational amplifier A 2 connect the output of Current Transmit 1, and the output of operational amplifier A 2 connects the input of grid side A/D converter U2; Operational amplifier is used for the grid side current signal of current transformer collection to amplify.In parallel and the Opposite direction connection of diode D3, diode D4 between two outputs of Current Transmit 1, for playing clamping action to the signal of current transformer collection.Between the electrode input end that the parallel circuit in series of resistance R2 and electric capacity C3 is connected to operational amplifier A 2 and output, resistance R2 is feedback resistance, and electric capacity C3 strobes.The circuit theory of grid side current amplification circuit FC2 with FC3 is identical with the circuit theory of grid side current amplification circuit FC1.
Motor side voltage/current detection circuit is for completing the collection to motor side voltage, electric current.The output of motor side voltage/current detection circuit connects the input of motor side A/D converter, and the output of motor side A/D converter connects the input of master controller.
In the utility model, motor side voltage/current detection circuit comprises AC Hall voltage transducer, AC Hall current sensor, motor side voltage amplifier circuit and motor side current amplification circuit, AC Hall voltage transducer and AC Hall current sensor are arranged on motor side three-phase power line, the output of AC Hall voltage transducer connects the input of motor side voltage amplifier circuit, and the output of motor side voltage amplifier circuit connects the input of motor side A/D converter; The output of AC Hall current sensor connects the input of motor side current amplification circuit, and the output of motor side current amplification circuit connects the input of motor side A/D converter.
As shown in Figure 3, motor side voltage/current detection circuit comprises AC Hall voltage transducer HV2 ~ HV4, AC Hall current sensor HA1 ~ HA3, motor side voltage amplifier circuit FHV2 ~ FHV4 and motor side current amplification circuit FHA1 ~ FHA3 to motor side voltage/current detection circuit in the present embodiment.
Motor side voltage amplifier circuit FHV2 comprises AC Hall voltage transducer HV2, operational amplifier A 4 and resistance R10 ~ R14.AC Hall voltage transducer HV2 is sent on the former limit of AC Hall voltage transducer HV2 after motor side voltage transitions is electric current by resistance R10, the signal collected is delivered to operational amplifier A 4 and is carried out signal amplification by AC Hall voltage transducer HV2 after divider resistance R11, R12 dividing potential drop, and resistance R13, R14 are the biasing resistor of operational amplifier.The output of operational amplifier A 4 connects the input of motor side A/D converter U3.The circuit theory of motor side voltage amplifier circuit FHV3, FHV4 is identical with the circuit theory of motor side voltage amplifier circuit FHV2.
Motor side current amplification circuit FHA1 comprises AC Hall current sensor HA1, operational amplifier A 5 and resistance R15 ~ R18.AC Hall current sensor HA1 is core-theaded type transducer, output signal is voltage signal, the signal collected is delivered to operational amplifier A 5 and is carried out signal amplification by AC Hall current sensor HA1 after divider resistance R15, R16 dividing potential drop, and resistance R17, R18 are the biasing resistor of amplifier.The output of operational amplifier A 5 connects the input of motor side A/D converter U3.The circuit theory of motor side current amplification circuit FHA2, FHA3 is identical with the circuit theory of motor side current amplification circuit FHA1.
Speed/torque sensor setting between motor and load, for gathering current motor rotating speed; The output of speed/torque transducer is connected with the input of motor side A/D converter U3.The present embodiment medium speed/torque sensor TS adopts rotary torque and speed sensors, outputs signal as voltage signal, and as shown in Figure 3, the output of rotary torque and speed sensors TS connects the input of motor side A/D converter U3.
Direct current bus voltage detecting circuit is for detecting DC bus-bar voltage, and the output of direct current bus voltage detecting circuit connects the input of motor side A/D converter.In the present embodiment, direct current bus voltage detecting circuit comprises DC side Hall voltage transducer and direct voltage amplifying circuit, the output of DC side Hall voltage transducer connects the input of direct voltage amplifying circuit, and the output of direct voltage amplifying circuit connects the input of motor side A/D converter.
The circuit theory of the direct current bus voltage detecting circuit FHV1 in the present embodiment as shown in Figure 3, comprises DC side Hall voltage transducer HV1, operational amplifier A 3, resistance R5 ~ R9.DC side Hall voltage transducer HV1 is sent on the former limit of DC side Hall voltage transducer HV1 after DC bus-bar voltage is converted to electric current by resistance R5, the signal collected is delivered to operational amplifier A 3 and is carried out signal amplification by DC side Hall voltage transducer HV1 after divider resistance R6, R7 dividing potential drop, and resistance R8, R9 are the biasing resistor of operational amplifier.The output of operational amplifier A 3 connects the input of motor side A/D converter U3.
Motor side A/D converter is transferred to master controller after being used for that the motor side voltage of collection, electric current, motor speed and direct voltage analog signal are converted to digital signal.
The input of master controller is connected with the output of grid side A/D converter with motor side A/D converter respectively; The output of master controller is connected with the control end of grid side pwm converter and motor side pwm converter respectively through optical coupling isolation circuit, realizes intercoming mutually between master controller with man-machine interface through communication interface.
12 optical coupling isolation circuit H1 ~ H12 are provided with altogether in the utility model, as shown in Figure 4, wherein optical coupling isolation circuit H1 ~ H6 is connected between master controller and grid side pwm converter IPM1, optical coupling isolation circuit H7 ~ H12 is connected between master controller and motor side pwm converter IPM2, and the electrical principle structure of 12 optical coupling isolation circuits is identical.
In the present embodiment, master controller adopts dsp processor TMS320F28335, can certainly use single-chip microcomputer; Grid side A/D converter and motor side A/D converter all adopt AD73360, and grid side pwm converter and motor side pwm converter all adopt intelligent power control module IPM150RL1A120.Optical coupling isolation circuit comprises resistance R21, electric capacity C5, electric capacity C6 and photoelectrical coupler U4, U4 and adopts HCPL4506.
Man-machine interface is communicated with master controller by communication interface, realizes the real-time display of motor operating state and the input of controling parameters and control command, and can preserve in real time motor operating state data.In the present embodiment, man-machine interface adopts industrial control all-in-one machine, and industrial control all-in-one machine has touch panel display device and storage hard disk; Communication interface adopts RS485 communication interface.
Operation principle of the present utility model is as follows:
Direct current bus voltage detecting circuit, grid side voltage/current detection circuit, motor side voltage/current detection circuit and speed/torque transducer are for completing the collection of data, master controller is according to the operating state of the data determination motor gathered, calculate the power output of motor, and export PWM2 control signal through optical coupling isolation circuit H7 control motor side pwm converter IPM2, the operating voltage of further control Electric Machine Control winding, electric current, frequency and phase sequence, regulate power output and the rotating speed of motor, control motor metasynchronism or supersynchronous operation; Simultaneously, master controller also exports PWM1 control signal and controls through optical coupling isolation circuit H1 the electric current that grid side pwm converter IPM1 controls grid side, energy is exported to electrical network when motor is in when metasynchronism is run, absorb energy when motor is in supersynchronous operation from electrical network, control DC bus-bar voltage at four quadrant running.
In the utility model, can different control algolithms be designed as required realize, as vector control, direct torque control etc. to the control of brushless dual-feed motor in master controller.
Claims (7)
1. the control device for brushless dual-feed motor, it is characterized in that: comprise master controller, grid side pwm converter, motor side pwm converter, direct current bus voltage detecting circuit, grid side voltage/current detection circuit, motor side voltage/current detection circuit, speed/torque transducer and A/D converter, described grid side pwm converter is arranged on three-phase alternating current electrical network side, motor side pwm converter is arranged on motor side, is DC bus between grid side pwm converter and motor side pwm converter; Described grid side voltage/current detection circuit is for gathering line voltage and electric current, and the output of grid side voltage/current detection circuit connects the input of grid side A/D converter, and the output of grid side A/D converter connects the input of master controller; Described motor side voltage/current detection circuit is for gathering electric moter voltage and electric current, and the output of motor side voltage/current detection circuit connects the input of motor side A/D converter, and the output of motor side A/D converter connects the input of master controller; The input of described motor side A/D converter also connects and is arranged on the speed/torque transducer between motor and load and the direct current bus voltage detecting circuit for detecting DC bus-bar voltage; The output of described master controller is connected with the control end of grid side pwm converter and motor side pwm converter respectively through optical coupling isolation circuit.
2. a kind of control device for brushless dual-feed motor according to claim 1, it is characterized in that: described grid side voltage/current detection circuit comprises voltage transformer, current transformer, grid side voltage amplifier circuit and grid side current amplification circuit, voltage transformer summation current transformer is arranged in three-phase alternating current electrical network, the output of voltage transformer connects the input of grid side voltage amplifier circuit, and the output of grid side voltage amplifier circuit connects the input of grid side A/D converter; The output of current transformer connects the input of grid side current amplification circuit, and the output of grid side current amplification circuit connects the input of grid side A/D converter.
3. a kind of control device for brushless dual-feed motor according to claim 2, it is characterized in that: described direct current bus voltage detecting circuit comprises DC side Hall voltage transducer and direct voltage amplifying circuit, the output of DC side Hall voltage transducer connects the input of direct voltage amplifying circuit, and the output of direct voltage amplifying circuit connects the input of motor side A/D converter.
4. a kind of control device for brushless dual-feed motor according to claim 3, it is characterized in that: described motor side voltage/current detection circuit comprises AC Hall voltage transducer, AC Hall current sensor, motor side voltage amplifier circuit and motor side current amplification circuit, AC Hall voltage transducer and AC Hall current sensor are arranged on motor side three-phase power line, the output of AC Hall voltage transducer connects the input of motor side voltage amplifier circuit, the output of motor side voltage amplifier circuit connects the input of motor side A/D converter, the output of AC Hall current sensor connects the input of motor side current amplification circuit, and the output of motor side current amplification circuit connects the input of motor side A/D converter.
5. a kind of control device for brushless dual-feed motor according to claim 4, it is characterized in that: described grid side pwm converter and motor side pwm converter adopt intelligent power control module IPM, and speed/torque transducer adopts rotary speed/torque transducer.
6. a kind of control device for brushless dual-feed motor according to claim 5, is characterized in that: comprise communication interface, and described communication interface adopts RS485 communication interface.
7. a kind of control device for brushless dual-feed motor according to claim 6, is characterized in that: described master controller adopts single-chip microcomputer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420810423.5U CN204408229U (en) | 2014-12-21 | 2014-12-21 | A kind of control device for brushless dual-feed motor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420810423.5U CN204408229U (en) | 2014-12-21 | 2014-12-21 | A kind of control device for brushless dual-feed motor |
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| CN204408229U true CN204408229U (en) | 2015-06-17 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107065621A (en) * | 2017-05-23 | 2017-08-18 | 天津通卓机器人有限公司 | A kind of supporting power supply for motor of being polished for high frequency |
| CN111999642A (en) * | 2020-07-21 | 2020-11-27 | 山东科技大学 | Motor power density testing device and method |
-
2014
- 2014-12-21 CN CN201420810423.5U patent/CN204408229U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107065621A (en) * | 2017-05-23 | 2017-08-18 | 天津通卓机器人有限公司 | A kind of supporting power supply for motor of being polished for high frequency |
| CN111999642A (en) * | 2020-07-21 | 2020-11-27 | 山东科技大学 | Motor power density testing device and method |
| CN111999642B (en) * | 2020-07-21 | 2021-07-23 | 山东科技大学 | Motor power density testing device and method |
| WO2022016691A1 (en) * | 2020-07-21 | 2022-01-27 | 山东科技大学 | Electric motor power density testing apparatus and method |
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