CN2667799Y - Low-cost high-performance DC brushless electric machine controller - Google Patents
Low-cost high-performance DC brushless electric machine controller Download PDFInfo
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- CN2667799Y CN2667799Y CNU2003201141606U CN200320114160U CN2667799Y CN 2667799 Y CN2667799 Y CN 2667799Y CN U2003201141606 U CNU2003201141606 U CN U2003201141606U CN 200320114160 U CN200320114160 U CN 200320114160U CN 2667799 Y CN2667799 Y CN 2667799Y
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Abstract
The utility model relates to a DC brushless motor controlling device with a low cost and a high capability. The utility model comprises an AC input unit and a rectifying unit; the output end of the rectifying unit is connected with the current signal processing unit through the current sampling circuit; the output end of the rectifying unit is connected with the reverse changing unit of three phase AC voltage which can carry out the exchange of the DC and AC and change frequency and voltage; the frequency and speed adjusting output end of the reverse changing unit is directly connected with the three phase winding of the motor stator; the voltage signal processing unit is connected with the three phases winding of the motor stator through the sampling circuit of the three phase voltage; the signals of the current signal processing unit and the voltage signal processing unit are all connected into the digital signal processor unit; and the digital signal processor unit carries out the whole calculation and connects the spring unit which is connected with the reverse changing. The utility model has a simple structure, a good reliability, a high efficiency of the system, a strong interference proof capability and a low cost.
Description
Technical field
The utility model belongs to the electric machines control technology field, relates to a kind of low-cost and high-performance dc brushless motor control device.
Background technology
Existing dc brushless motor control system has two classes, i.e. analog control system and numerical control system.Analog control system is to be the control circuit of core formation with special-purpose brshless DC motor control chip, and its typical control chip is the ML4425 cake core that U.S. Fairchild company produces.This control system is simple in structure, but owing to be subjected to the restriction of self, there is following shortcoming in this system: cost is higher, poor reliability, and speed adjusting performance is undesirable, speed adjustable range is little, the starting current of motor is excessive, and is wayward, poor to the adaptive capacity of load, need be to different load designs and adjusting system hardware, maintenance is inconvenient.The numerical control system major part is to be core with microcontroller or digital signal processor.The numerical control system good speed adjustment features, adaptive capacity is strong, and its speed regulator and current regulator realize by software, provides material base for adopting different control algolithms.But numerical control system also exists following defective: need speed probe, and the cost height of speed probe needs special machinery to install, and is unfavorable for the debugging and the maintenance of system, has caused the reliability variation of system simultaneously.Some does not need the numerical control system of speed probe, and its speed control performance is undesirable, and especially low-speed performance is poor, the rotational speed regulation narrow range, anti-electromagnetic interference capability a little less than, the hardware configuration relative complex, price is higher.
Summary of the invention
Technical problem to be solved in the utility model is that a kind of simple in structure, speed-regulating range width, good reliability, system effectiveness height, low-cost and high-performance dc brushless motor control device that antijamming capability is strong will be provided.
The technical scheme that solution the utility model technical problem is adopted is that this low-cost and high-performance dc brushless motor control device comprises AC input cell, rectification unit, the control power supply, the output of rectification unit is connected with the current signal processing unit by current sampling circuit, the output of rectification unit simultaneously with can carry out the AC/DC conversion, form variable ratio frequency changer, the inversion unit of the three-phase alternating voltage of transformation connects, the frequency control output of inversion unit directly is connected with three phase windings of motor stator, having voltage signal processing unit to pass through the three-phase voltage sample circuit is connected with three phase windings of motor stator, the signal of current signal processing unit and voltage signal processing unit is the incoming digital signal processor unit all, and the digital signal processor unit is carried out whole control algolithms and the trigger element that is connected with inversion unit is carried out control connection.
Compare with background technology, control has following advantage to the utility model to dc brushless motor:
1, size is little, and is simple in structure: all hardware circuit is integrated on the little printed circuit board (PCB), supports device without any need for the outside.
2, speed-regulating range width: generally, speed adjustable range can reach 1: 40.At different motors, stator frequency reaches as high as 200Hz, the minimum 0.5Hz that reaches.
3, easy to use: as not have any special mounting and positioning requirements.
4, adaptability is good, can be used for different capacity, the brshless DC motor of different structure, has the characteristics of unified controller.Can be applicable to various industry and civilian occasions such as blower fan, water pump, compressor.
5, good reliability: handling failure automatically, no maintenance requirement.
6, antijamming capability is strong, applicable to the abominable occasion of environment.Ability with good anti-change of current noise can guarantee under different loading conditions, and good dynamic control ability is arranged.
7, efficient height: can reach more than 90%.
8, cost is low: system hardware all adopts common components and parts, does not have any particular device.
9, software upgrading is convenient.
Description of drawings
Below in conjunction with the embodiment accompanying drawing the utility model is described in further detail.
Fig. 1 is a frame principle figure of the present utility model
Fig. 2 is a digital signal processor element circuit schematic diagram
Fig. 3 is the interface circuit schematic diagram that digital signal processor links to each other with external emulator (JTAG)
Fig. 4 is the external interface circuit schematic diagram of digital signal processor
Fig. 5 is high speed serial port (CAN) interface circuit schematic diagram
Fig. 6 is the trigger element circuit theory diagrams
Fig. 7 is the rectification unit circuit theory diagrams
Fig. 8 is the inverter unit circuit theory diagrams
Fig. 9 is the voltage sampling circuit schematic diagram
Figure 10 is current signal processing unit circuit theory diagrams
Figure 11 is control power unit circuit schematic diagram
Figure 12 DSP CONTROL program flow diagram
Among the figure: the 1-AC input cell, the 2-rectification unit, the 3-inversion unit, the 4-motor, the 5-trigger element, the 6-voltage signal processing unit, 7-current signal processing unit, 8-digital signal processor unit, the 9-interface circuit, R-resistance, C-electric capacity, the U1-chip (adopt TPS3809) that resets, U2-DSP chip (adopting TMS320LF240A), U3-operational amplifier (adopting LM6134), U4-analog switch (adopting DG9422), the U5-stabilized voltage power supply (adopts LM1117,3.3v), U6-voltage voltage stabilizing chip (adopts 1117,5v), U7-high-voltage switch gear integrated regulated power supply chip (adopting TNY266G), U8-photocoupler (adopting PC817A), U9-high speed serial communication mouth (adopting TLE6250GV33), U10-three-phase drive module (adopting TR21362), U11, U12-operational amplifier (adopting LM248), Y1-crystal oscillator (adopting ECS-10FM/SM), T1-high frequency voltage descending transformer (adopting PNY-05015), Q1～Q6-field effect transistor, D1-diode (adopting 1N5822), D2-diode (adopting 1N4001), D3-voltage-stabiliser tube (adopting 1N4742A), D4～D6-diode (adopting MMSD4148), D7-single-phase full bridge rectifier (adopting KBU6J), ISO1, the ISO2-photocoupler, the Itrip-current detector
Embodiment
In the present embodiment, this low-cost and high-performance dc brushless motor control device, comprise AC input cell, rectification unit, inversion unit has the digital signal processor unit to carry out whole control algolithms and trigger element is controlled, there is the current signal processing unit that the dc bus sample rate current is handled, give the digital signal processor unit after the processing again, have voltage signal processing unit that the three-phase sampled voltage is handled, give the digital signal processor unit after the processing again.Wherein the digital signal processor unit is the core of this device, and it carries out whole control algolithms, and by trigger element control inversion unit, realizes the frequency control to motor.
As shown in Figure 1, the hardware of this patent is made up of following functional unit:
AC input cell, rectification unit, inversion unit, sampled signal processing unit, trigger element, digital signal processing unit and interface circuit etc.
Among Fig. 2, the digital signal processor unit is a core of the present utility model, and it carries out whole control algolithms, and by trigger element control inversion unit, realizes the frequency control to motor.Have with external emulator connected interface circuit, external interface circuit, high speed serial port CAN circuit and link to each other with the digital signal processor unit.
Among Fig. 3, jtag interface is handled the digital processing unit U2 signal relevant with JTAG, and TMS, TDO, TDI, TCK, EMU0 and EMU1 link to each other with external emulator by plug J1.
Fig. 4 is the external interface circuit schematic diagram, and interface circuit links to each other with the digital signal processor unit.For preventing to disturb, adopted optocoupler in the external interface circuit.
Fig. 5 is a serial ports CAN interface circuit schematic diagram.Special-purpose CAN integrated chip, i.e. a CAN high speed serial port in this interface, have been used.
Fig. 6 is the drive circuit schematic diagram.Drive circuit unit links to each other with the digital signal processor unit, its core U10, and it is one and inherits driving amplification chip that its insulating capacity reaches 600v.
Fig. 7 is the rectification unit circuit theory diagrams.The output of rectification unit is connected with inversion unit by dc bus.Rectification unit is realized the AC/DC conversion, forms DC bus-bar voltage.R62 among the figure is that overcurrent suppresses thermistor, is used for the impulse current of restriction system; J8 is used for the single phase alternating current (A.C.) input of net side, and when voltage on line side was 220v, DC bus-bar voltage was 300v; Voltage-multiplying circuit interface J7 is arranged in the rectification unit circuit, and when line voltage was 110v, the voltage-multiplying circuit that is connected by socket J7 worked, and still DC bus-bar voltage can be maintained 300v, like this, has just improved the adaptive capacity of system to different electrical network standards.
Fig. 8 is the inversion unit circuit theory diagrams.Inversion unit is the actuator of Electric Machine Control, it realizes the DC/AC conversion, form the alternating voltage of variable ratio frequency changer, transformation, to regulate and the control rotating speed of motor, inversion unit comprises six field effect transistor (MOSFET) power component switch, three field effect transistor (MOSFET) power component switch is formed the last bridge tube of inversion unit, and three field effect transistor (MOSFET) power component switch is formed the following bridge tube of inversion unit in addition, and every switch all and RC overcurrent absorption circuit arranged.Inversion unit output 220V three-phase alternating current, the output highest frequency is 200HZ, low-limit frequency is 0.5HZ.Socket J9 is as the sampling access port of the voltage sampling circuit (shown in Figure 9) of threephase stator.
Fig. 9 is the voltage sampling circuit schematic diagram.The threephase stator voltage A of motor, B, C deliver to the A/D input channel of digital signal processor U2 through electric resistance partial pressure and filtering by voltage follower.Meanwhile, DC bus-bar voltage also is sampled;
Figure 10 is current signal processing unit circuit theory diagrams.The output of rectification unit is connected with the current signal processing unit by current sampling circuit, its current sampling circuit is that current sampling resistor (R10) is connected on the dc bus, and the electric current change in pressure drop information that current sampling resistor (R10) produces of flowing through connects into the current signal processing unit.On dc bus, be connected to a current sampling resistor R10, the pressure drop that its produces is treated, after the sampling, as the information of reflection electric current.The voltage retainer is by the control of Sample-I, and output can accurately reflect the situation of electric machine phase current.Meanwhile, U3C has constituted a voltage comparator, in order to form overcurrent sensing circuit;
Figure 11 is control power unit circuit schematic diagram.U7 is the core pwm chip of this unit.This unit has adopted a simple AC/DC translation circuit, and its input voltage is taken from dc bus, and three groups of output voltages are arranged: 3, and 3V, 5V and 12V.Optocoupler U8 is used for FEEDBACK CONTROL.
The course of work of the present utility model:
220v or 110v single phase alternating current (A.C.) electrical socket J8 enter, and send into rectification unit by AC input cell.Rectification unit becomes direct current to single-phase alternating current.
AC input cell is used for single phase alternating current (A.C.) input is carried out antinoise and current limliting processing, and rectification unit is directly supplied with in its output, as shown in Figure 7.R62 is a piezo-resistance, and its effect is the impact overcurrent when suppressing system works, and L2 is the common mode associate coil, is used to reduce the electromagnetic interference (EMI) level.Rectification unit is realized the conversion of AC/DC, forms dc bus (DC-BUS) voltage; D7 is a single-phase full bridge rectifier, and the DC filter filtering that capacitor C 36 that its output process is connected in series and C37 form obtains level and smooth direct current, delivers on the dc bus.When J8 input 220v single-phase alternating current, DC bus-bar voltage is 300v; If voltage on line side is 110v, then insert voltage-multiplying circuit by socket J7, still dc bus (DC-BUS) voltage can be remained 300v.So just improved the adaptive capacity of system to different electrical network standards, this is one of characteristics of native system.
The direct current of 300v on the dc bus is delivered to inversion unit.Inversion unit is the performance element of Electric Machine Control, and it realizes the conversion of DC/AC, forms the three-phase alternating voltage of variable ratio frequency changer, transformation, with the control motor; Simultaneously, current sample is also undertaken by the dc bus place.
Inversion unit: inversion unit mainly is made up of 6 field effect transistor MOSFET power switch components, referring to Fig. 8.Q1, Q2 and Q3 are the last bridge tube of inverter among the figure, and Q4, Q5 and Q6 are the following bridge tube of inverter.Inversion unit output 220v three-phase alternating current (C phase, B phase and A are mutually), the output highest frequency is 200Hz, low-limit frequency is 0.5Hz.This is in unexistent high-performance in the like product in the world at present.Its output directly is connected on three phase windings of stator of motor, to regulate and the control rotating speed of motor.Socket J9 is as the sampling access port of the voltage sampling circuit (shown in Figure 9) of threephase stator.
The current signal processing unit: as seen from Figure 10, a current sampling resistor R10 is connected on the dc bus of inverter input.The electric current pressure drop that R10 produces of flowing through, treated, sampling, reflection current information.Voltage signal on the R10 carries out processing and amplifying at first through filtering, delivers to the input of analog switch U4.The break-make of this analog switch is subjected to digital signal processor U2 control, and it and capacitor C 11 have constituted a voltage retainer, and it is exported through a voltage follower U3B, delivers to the A/D passage of digital signal processor U2.The direct current sample circuit of this hardware supports becomes continuous voltage signal with the direct current of pulsed, lays a good foundation for the control algolithm that realizes motor, and this is big characteristics of the utility model patent.Simultaneously, U3C has constituted a voltage comparator, can form overcurrent sensing circuit by it.
Voltage sampling circuit: as seen from Figure 9, the threephase stator voltage A phase of motor, B pass through electric resistance partial pressure and filtering mutually with C mutually, deliver to the input channel of the A/D of digital signal processor U2 again by voltage follower.Simultaneously, dc bus (DC-BUS) voltage also is sampled.
The digital signal processor unit is a core of the present utility model, and it carries out whole control algolithms, and by trigger element control inversion unit, realizes the variable frequency regulating speed control to motor.Fig. 2 shows this element circuit schematic diagram.Among the figure, U2 is a digital signal processor, and model is TMS320F2403A.U1 is the chip that resets, and the reset signal that is used to the system that produces is given U2.U2 has 8 tunnel 10 analog input channels.6 tunnel current feedback (Current-feedback) that are used to sample dc bus current wherein, threephase stator voltage (Phase-VA-Feedback, Phase-VB-eedback and Phase-VC-Feedback), DC bus-bar voltage (Bus-Uoltage) and external analog input command (Commnd-Input).U2 has three road lock-bits (Capture) input signal, is respectively applied for the interface of external signal.U2 has 6 tunnel pulse width modulations (PWM) output channel, is used for 6 field effect transistor power component switches of control inverter.In this 6 road signal, GAU, GBU and GCU are used to control bridge tube; GAL, GBL and GCL are used to control down bridge tube.The overcurrent of motor and major loop is monitored by digital signal processor by overcurrent (Over-Current-Flag) and fault (FAULT) input pin.The programming of U2 links to each other with external emulator (JTAG) by plug J1 and realizes.The signal relevant with JTAG comprises that test pattern selects input (TMS), test data to export (TDO), test data input (TDI), test clock is imported (TCK), emulation testing I/O port 0 (EMU0) and emulation testing I/O port 1 (EMU1).In addition, a general high speed serial port (CAN) is used for the communication between U2 and the outer computer, and relevant signal is CAN-RX (high speed serial port input) and CAN-TX (high speed serial port output).Crystal oscillator Y1 is used for journey mode and programming.
Trigger element among Fig. 1 is for each power component of giving inverter provides triggering signal, simultaneously, it is amplified to the level of the power component that can drive this circuit, in order to ON time and the conducting order of controlling each power component, reaches the purpose of frequency control.Fig. 6 is the schematic diagram of trigger element.Its core partly is U10, and it is that chip is amplified in an integrated driving.Its insulating capacity reaches 600v.It accepts next control signal GAU, GBU, GCU, GAL, GBL and GCL by U2, then, with its be amplified to can driven MOS FET level, it is output as HO1, HO2, HO3, LO1, LO2 and LO3, they are connected respectively on the grid of 6 MOSFET pipes of inverter.This chip has 4 control pins, is respectively Fault, En, Itrip and Rcin.Wherein Rcin is used for the control that resets of heart sheet; Itrip is used to detect main circuit current.When main circuit current surpassed predetermined value, this chip will produce Fault (fault) signal and give U2, is used for the fault Interrupt Process.En is an output enable, and it controls the work of U2.
Interface circuit has three:
(1), programming and debugging jtag interface, as shown in Figure 3, it links to each other with external emulator, is used for programming and debugs.Its signal links to each other with U2, and in respect of TMS, TDI, TDO, TCK, EMU0 and EMU1, these signals link to each other with external emulator by the plug J1 of one 10 pin.
(2), external interface, as shown in Figure 4.In this interface circuit,, in circuit, adopted optocoupler in order to prevent noise jamming.Wherein, ISO1 has the two-way optocoupler, is respectively applied for break-make control ON-OFF-Control and dtc signal input (Torque-PWM-IN).Optocoupler ISO2 is used for output speed information (Output-Speed-PWM-dsp).
(3), HSSI High-Speed Serial Interface CAN, as shown in Figure 5.The high speed serial port that CAN is very common, it is replacing the standard that RS232 becomes serial communication..J3 is the plug of one 2 pin, is used for being connected with external device.
Control power subsystem: as shown in figure 11.The control power supply is a simple DC/DC translation circuit, and 300v dc bus (DC-BUS) voltage is taken from its input, and it is output as 3.3v, 5v and 12v, uses photocoupler (U8) as FEEDBACK CONTROL.U7 is core pulse width modulation (PWM) control chip of this unit.3.3v is used for some relevant control chips of digital signal processor among three groups of voltage: the 3.3v of its output, 5v and 12v; 5v is used for JTAG; 12v is used for drive circuit.
This device is no position, no speed probe, adopts the brushless motor control system of dicyclo control, and the speed outer shroud that it has, the control of the dicyclo of current inner loop are to be finished by digital processor unit.The software control algorithm of optimizing is used in rotating speed control, in the speed control of no rotating speed, no-rotor position sensor,, calculate the back-emf of motor according to the stator three-phase voltage signal of sampling, to determine the zero crossing of back-emf, rotor-position is carried out real-time online estimate.Adopt the closed loop change of current control during high speed, adopt the open loop change of current control during low speed, to have guaranteed the reliability of the change of current.The switching point that is controlled to closed loop change of current control by the open loop change of current can carry out under very low rotating speed.Speed adjustable range is 1: 40; Highest frequency is 200Hz, and low-limit frequency is 0.5Hz.Speed-regulating range width, low-speed performance is good.The control of motor is divided into three phases: rotor initial alignment, open loop are creeped and closed-loop control.Here said open loop and closed loop are meant the change of current control of inverter.The change of current of inverter control is that the rotor-position according to motor carries out.The utility model proposes the controlling schemes of no-rotor position detector and no speed probe.Its thinking is the motor stator three-phase voltage signal according to sampling, and the real-time online of rotor-position is estimated.When motor speed was higher than certain velocity amplitude, the control algolithm of proposition had very high precision, can guarantee the accurate change of current of inverter; When low speed and since the stator voltage signal of sampling too a little less than, there is certain deviation in estimated rotor-position, this deviation is difficult for compensation.This is the problem of the Electric Machine Control existence of present no-rotor position detector, makes control extremely unreliable.In order to guarantee the reliable control of motor, adopt open loop control in the low speed segment change of current.Time by digital signal processor U2 control low speed jerking motion speed and low speed jerking motion has solved this difficult problem, controls effectively, but also can adapt to different application scenarios.This is of the present utility model one big characteristics.
Sampling stator three-phase voltage is used for the On-line Estimation rotor-position, to realize the correct change of current; The sampling dc bus current is used to collect together the phase current of system motor and the electromagnetic torque of motor; In order to realize closed-loop control, just need rotary speed information, because the utility model does not have speed probe,, solved this problem well so developed the rotating speed algorithm for estimating.
Change of current control is the core of digital signal processor U2 work control.It determines the moment of each change of current.The utility model no-rotor position detector, rotor position information is here calculated by the back-emf of the online brshless DC motor that estimates of digital signal processor U2.
Working procedure is described:
Classical dicyclo control is used to the exploitation of control algolithm.Outer shroud is a speed ring, and interior ring is an electric current loop.Dicyclo adopts the identical sampling period, is 25uS.The PWM control frequency is 200Hz.There are 2 timer T1 and T2 in digital signal processor inside, and here, T1 is used for PWM regularly, and T2 is used for control regularly.Whole control process is made up of with several different functional module subprograms a main program.
Main program is mainly used in the initialization and the interrupt latency self-loopa of system.The base program block diagram is as shown in figure 12:
Each subroutine function is introduced
1) interrupt control routine.
Whole controlled function of motor regularly interrupt finishing by T2.The timing sampling control cycle of T2 is 25us.The control of motor is divided into three phases: the initial alignment of rotor; Open loop is creeped; Closed-loop control.The utility model proposes the speed-control scheme of no rotating speed or no-rotor position sensor.Its thinking is according to the motor threephase stator voltage signal of sampling rotor-position to be carried out real-time online to estimate.When motor speed is higher than certain speed,, use the method for the open loop change of current in the change of current of low-speed stage in order to guarantee the reliable control of the change of current.Time and speed during final stage of creeping are all finished by digital signal processor U2.
2) A/D sampling subprogram.
The stator three-phase voltage of motor is sampled, and is used for the On-line Estimation rotor-position, to realize the correct change of current.Meanwhile, dc bus current also is sampled, and is used to control the phase current of electricity and the electromagnetic torque of motor.Number subsignal processor has 8 A/D passages, distributes to electric current and three-phase voltage respectively.
3) change of current control subprogram.
Change of current control is the core of the whole work of digital signal processor U2, and its task is the moment of the each change of current of decision.The characteristics of permanent-magnet brushless DC electric machine control are at any time, and two-phase stator winding conduction is only arranged, and another is in non-conductive state mutually.In theory, the back-emf of this non-conductive phase can online detection or is estimated, and itself has comprised rotor position information, controls the condition that provides for realizing the no transducer change of current.In this control algolithm, the stator three-phase voltage of being sampled is used to calculate the back-emf of non-conductive phase.The back-emf that calculates or estimate is used for determining its zero crossing.In addition, also consider change of current The noise fully, improved the antijamming capability of whole system.
4) phase-splitting control subprogram
Usually, motor windings has six kinds of conducting states, and it is numbered 0,1,2,3,4,5, the corresponding numbering of each conducting state.Physical relationship is as follows:
Bridge under the bridge on the numbering
0 A phase B phase
1 A phase C phase
2 B phase C phases
3 B phase A phases
4 C phase A phases
5 C phase B phases
The information that this phase-splitting control subprogram will be come according to the transmission of change of current control subprogram, the variation that decision respectively is conducted.
5) rotating speed estimator program
In order to realize the closed-loop control of rotating speed, rotary speed information must be arranged.Because this control system does not have speed probe, so, essential exploitation rotating speed algorithm for estimating in software.It calculates motor speed by the timing information that change of current control subprogram is provided.
6) rotating speed and Current Regulation subprogram.
Rotating speed and electric current all adopt the pi regulator algorithm to control.In this algorithm of specific implementation, used the anti-saturation algorithm.
7) pulse width modulation (PWM) inversion control subprogram.
This subprogram is the final executor of The whole control algorithm, determines the duty ratio of PWM by it.
Claims (9)
1, a kind of low-cost and high-performance dc brushless motor control device, comprise AC input cell, rectification unit, the control power supply, the output that it is characterized in that rectification unit is connected with the current signal processing unit by current sampling circuit, the output of rectification unit simultaneously with can carry out the AC/DC conversion, form variable ratio frequency changer, the inversion unit of the three-phase alternating voltage of transformation connects, the frequency control output of inversion unit directly is connected with three phase windings of motor stator, having voltage signal processing unit to pass through the three-phase voltage sample circuit is connected with three phase windings of motor stator, the signal of current signal processing unit and voltage signal processing unit is the incoming digital signal processor unit all, and the digital signal processor unit is carried out whole control algolithms and the trigger element that is connected with inversion unit is carried out control connection.
2, low-cost and high-performance dc brushless motor control device according to claim 1 is characterized in that the output of rectification unit is connected with inversion unit by dc bus.
3, low-cost and high-performance dc brushless motor control device according to claim 2, the output that it is characterized in that rectification unit is connected with the current signal processing unit by current sampling circuit, its current sampling circuit is that current sampling resistor (R10) is connected on the dc bus, the electric current change in pressure drop information that current sampling resistor (R10) produces of flowing through connects into the current signal processing unit, and it becomes continuous voltage signal with the current signal of pulsed.
4, low-cost and high-performance dc brushless motor control device according to claim 1 is characterized in that having with external emulator connected interface circuit, external interface circuit, high speed serial port CAN circuit linking to each other with the digital signal processor unit.
5, low-cost and high-performance dc brushless motor control device according to claim 4 is characterized in that having adopted in the external interface circuit optocoupler.
6, low-cost and high-performance dc brushless motor control system according to claim 1 is characterized in that voltage-multiplying circuit interface J7 is arranged in the rectification unit circuit.
7, low-cost and high-performance dc brushless motor control device according to claim 1, it is characterized in that inversion unit comprises six field effect transistor (MOSFET) power component switch, three field effect transistor (MOSFET) power component switch is formed the last bridge tube of inversion unit, in addition three field effect transistor (MOSFET) power component switch is formed the following bridge tube of inversion unit, and every switch all and have the RC overcurrent to absorb circuit.
8, low-cost and high-performance dc brushless motor control device according to claim 7 is characterized in that inversion unit output 220V three-phase alternating current, and the output highest frequency is 200HZ, and low-limit frequency is 0.5HZ.
9, low-cost and high-performance dc brushless motor control device according to claim 2, it is characterized in that controlling power supply is a simple DC/DC translation circuit, the 300v DC bus-bar voltage is taken from its input, and it is output as 3.3v, 5v and 12v, uses photocoupler (U8) as FEEDBACK CONTROL.
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| CNU2003201141606U CN2667799Y (en) | 2003-11-19 | 2003-11-19 | Low-cost high-performance DC brushless electric machine controller |
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| CNU2003201141606U CN2667799Y (en) | 2003-11-19 | 2003-11-19 | Low-cost high-performance DC brushless electric machine controller |
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| CN106030027A (en) * | 2014-12-30 | 2016-10-12 | 昆山悦利电气有限公司 | Methods and systems for directly driving a beam pumping unit by a rotating motor |
| CN109286351A (en) * | 2018-11-15 | 2019-01-29 | 江苏开璇智能科技有限公司 | A kind of current limliting automatic adjustment device for motor |
| CN110061679A (en) * | 2019-05-31 | 2019-07-26 | 西安石油大学 | A kind of Intelligent frequency conversion speed adjusting device and its control method suitable for pulse-type load |
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2003
- 2003-11-19 CN CNU2003201141606U patent/CN2667799Y/en not_active Expired - Fee Related
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| CN102223120A (en) * | 2010-04-15 | 2011-10-19 | 山东欧锴空调科技有限公司 | Method for controlling permanent magnet brushless direct-current motor and driver |
| CN102996485A (en) * | 2012-11-30 | 2013-03-27 | 杭州顿力电器有限公司 | Isolation characteristic speed regulation circuit of electronic control type fan of outer rotor and speed regulation method |
| CN102996485B (en) * | 2012-11-30 | 2015-10-21 | 杭州顿力电器有限公司 | The isolation characteristic alignment circuit of electronic control type fan of outer rotor and speed regulating method |
| CN103078573A (en) * | 2013-02-05 | 2013-05-01 | 安徽中家智锐科技有限公司 | Starting method of brushless DC (Direct Current) motor without Hall sensor |
| CN106030027A (en) * | 2014-12-30 | 2016-10-12 | 昆山悦利电气有限公司 | Methods and systems for directly driving a beam pumping unit by a rotating motor |
| US10428629B2 (en) | 2014-12-30 | 2019-10-01 | Yueli Electric (Jiangsu) Co., Ltd. | Methods and systems for directly driving a beam pumping unit by a rotating motor |
| CN106030027B (en) * | 2014-12-30 | 2020-12-01 | 悦利电气(江苏)有限公司 | Method and system for directly driving beam-pumping unit by rotating motor |
| CN104931271A (en) * | 2015-05-19 | 2015-09-23 | 成都诚邦动力测试仪器有限公司 | Bootstrap circuit-based engine measurement and control system |
| CN105043771A (en) * | 2015-05-19 | 2015-11-11 | 成都诚邦动力测试仪器有限公司 | High-sensitivity engine measuring and controlling system |
| CN109286351A (en) * | 2018-11-15 | 2019-01-29 | 江苏开璇智能科技有限公司 | A kind of current limliting automatic adjustment device for motor |
| CN110061679A (en) * | 2019-05-31 | 2019-07-26 | 西安石油大学 | A kind of Intelligent frequency conversion speed adjusting device and its control method suitable for pulse-type load |
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