CN1964179A - A control method and device for permanently magnetic brushless motor - Google Patents

A control method and device for permanently magnetic brushless motor Download PDF

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CN1964179A
CN1964179A CNA2005101101000A CN200510110100A CN1964179A CN 1964179 A CN1964179 A CN 1964179A CN A2005101101000 A CNA2005101101000 A CN A2005101101000A CN 200510110100 A CN200510110100 A CN 200510110100A CN 1964179 A CN1964179 A CN 1964179A
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徐国卿
张舟云
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SHANGHAI HAOKONG INFORMATION TECH Co Ltd
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SHANGHAI HAOKONG INFORMATION TECH Co Ltd
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Abstract

The disclosed control method for permanent-magnet brushless motor comprises: using a current function table to convert torque signal from controller into a given current signal; setting the output duty ratio of the given current and feedback current after passing a current regulator for PWM control; using a synchronous PWM signal generator to determine PWM sequence and action time according to all of the duty ratio and current conversion advance angle and current HALL signal for the weak magnetic control. This invention is high real-time and reliable, and can achieve system requirement on stability and dynamic regulation.

Description

A kind of control method of permanent magnetic brushless and device
Technical field:
The present invention relates to the technical field of electric automobile, specifically a kind of permanent magnetic brushless control method and device that is applicable to electric automobile.
Background technology:
Automobile is one of most important vehicles on the our times, but petroleum resources reduce day by day and fuel-engined vehicle has become automobile to the pollution of environment and has used problem demanding prompt solution; Development and exploitation upsurge pollution-free, low noise electric automobile are risen in the whole world, and it is 21 century developing of automobile industry direction that electric automobile replaces fuel-engined vehicle.
Electric automobile has proposed than the higher more complicated requirement of normal conditions its power set: Fraquent start/parking, carry fast/reduction of speed, output high torque (HT) during the low speed climbing, output low torque during the high speed economy run, have high-energy-density and high efficiency, reduce the size and the weight of vehicle body as much as possible, existing good dynamic characteristics, have high stable state accuracy again, and be easy to control.Current, the development level of electric automobile is unquestionable in short distance is travelled both at home and abroad, and " bottleneck " that restrict its development is actually because the capacity of storage battery is little, limited the distance travelled of once charging.At present under the condition that the Vehicular accumulator cell technology fails to break through, the power drive system of electric automobile is the key factor that realizes the electric automobile key property and solve this key issue, thereby requires electric drive system for electric vehicles should have high as far as possible torque density, good torque control ability, high operational reliability and have high as far as possible efficient in the whole electric automobile speed adjustable range.(starting torque is big for many unique advantages of permanent magnetic brushless, overload capacity is strong, volume is little, the efficient height, characteristics such as the life-span is long, and is non-maintaining), the operation characteristic that very is suitable for electric automobile, the permanent magnetic brushless of high efficiency, high unit capacity and high torque (HT)/weight ratio is very attractive, is one of first-selected drive system of power system of electric automobile.Therefore, need a kind of control method that can be used in the permanent magnetic brushless of power system of electric automobile of exploitation.
Summary of the invention:
The object of the present invention is to provide a kind of permanent magnetic brushless control device.
To achieve these goals, a kind of permanent magnetic brushless control device, this device comprises electric machine controller, it is characterized in that electric machine controller is connected with motor control unit, motor control unit is connected with the three-phase voltage inverter circuit, the three-phase voltage inverter circuit is connected with permanent magnetic brushless, and permanent magnetic brushless also is connected with position sensing circuit, and position sensing circuit is connected with motor control unit.
Wherein motor control unit comprises the current function unit, the first input end of current function unit is connected with first output of electric machine controller, the output of current function unit is connected with the input of current regulation unit, the output of current function unit also is connected with the first input end of weak magnetic degree computing unit, the output of current regulation unit is connected with the first input end of synchronous PWM generation unit, the output that weak magnetic potential is put computing unit is connected with second input of synchronous PWM generation unit, first output of motor speed computing unit is connected with the input that weak magnetic potential is put computing unit, second output of motor speed computing unit is connected with second input of current function unit, the input of motor speed computing unit is connected with the output of position sensing circuit, the output of position sensing circuit also is connected with the input of change of current computing unit, the output of change of current computing unit is connected with the 3rd input of synchronous PWM generation unit, second output of electric machine controller is connected with the four-input terminal of synchronous PWM generation unit, and the output of PWM generation unit is connected with the input of three-phase voltage inverter circuit synchronously.
This device also comprises the phase current sampling circuit, the processes temperature signal circuit, and voltage signal processing circuit, the input of phase current sampling circuit is connected with permanent magnetic brushless, and the output of phase current sampling circuit is connected with the input of synchronous PWM generation unit; The first input end of processes temperature signal circuit is connected with permanent magnetic brushless, and second input of processes temperature signal circuit is connected with the three-phase voltage inverter circuit, and the output of processes temperature signal circuit is connected with the input of synchronous PWM generation unit; The input of voltage signal processing circuit is connected with the input of three-phase voltage inverter circuit, and the output of voltage signal processing circuit is connected with the input of synchronous PWM generation unit.
Another object of the present invention provides a kind of control method that can be used in the permanent magnetic brushless of power system of electric automobile.
A kind of control method of permanent magnetic brushless is characterized in that the method includes the steps of: A, will convert given current signal to by the current function table from the tach signal of given signal of the torque of car load and motor speed computing unit by the current function unit; B, given electric current and the feedback current that is fed back by the phase current sampling circuit are handled the output duty cycle signal by current regulation unit; Current motor rotor position calculated signals motor speed and current motor rotor position that C, motor speed computing unit feed back according to position sensor circuit; D, calculate the change of current advance angle of weak magnetic control system according to given current signal and motor speed by weak magnetic degree computing unit; E, change of current position calculation unit are determined change of current position according to current motor rotor position; F, determine the PWM order of occurrence according to duty cycle signals, change of current advance angle and change of current position and take place constantly, and pass the signal to the three-phase voltage inverter circuit by synchronous pulse-width modulation (PWM) generation unit; G, realize control to permanent magnetic brushless by the three-phase voltage inverter circuit.
A kind of permanent magnetic brushless control method that the present invention proposes has very high real-time and reliability, the fine requirement of satisfying system stable operation and dynamic adjustments of control system energy, and system high efficiency rate district index surpasses desired indicator.
Description of drawings:
Fig. 1 is a permanent magnetic brushless control device theory diagram.
Fig. 2 is three-phase inverting circuit-permanent magnetic brushless main circuit schematic diagram.
Fig. 3 is a position sensor signal treatment circuit schematic diagram.
Fig. 4 is a current signal treatment circuit schematic diagram.
Fig. 5 is motor and controller processes temperature signal circuit theory diagrams.
Fig. 6 is a power model fault-signal treatment circuit schematic diagram.
Fig. 7 is a DC bus-bar voltage signal processing circuit schematic diagram.
Fig. 8 is a drive signal buffer circuit schematic diagram.
Fig. 9 is an electric machine controller hardware circuit principle block diagram.
Figure 10 is the software flow pattern of motor control unit.
Figure 11 is motor just becoming a full member normal commutation course position signalling and drive signal corresponding diagram.
Figure 12 is just changeing commutation course position signalling and drive signal corresponding diagram in advance for motor.
Figure 13 is the hard-wired structured flowchart of bus communication.
Figure 14 is the hard-wired circuit theory diagrams of bus communication.
Embodiment:
The invention will be further described below in conjunction with drawings and Examples.
At the permanent power working condition requirement of electric automobile to motor and control system thereof, permanent magnetic brushless when rated speed is following with permanent torque output, rated speed between the maximum speed with permanent power output.Corresponding to permanent magnetic brushless output-constant operation section, under the certain prerequisite of DC bus-bar voltage, when winding back emf during near DC bus-bar voltage, if the rotating speed that raises again, the back-emf of motor can surpass DC bus-bar voltage.Because the permanent magnetic brushless rotor field is constant, have only demagnetizing effect to weaken air-gap field by stator current, shift to an earlier date angle [alpha] of air-gap flux (opposite potential) by the control stator current, direct axis component by electric machine phase current realizes the demagnetizing effect to air-gap flux, improves motor speed with this.
The weak magnetic control system of the permanent magnetic brushless that this method proposes comprises following steps: A, will convert given current signal to by the current function table from the tach signal of given signal of the torque of car load and motor speed computing unit by the current function unit; B, given electric current and the feedback current that is fed back by the phase current sampling circuit are handled the output duty cycle signal by current regulation unit; Current motor rotor position calculated signals motor speed and current motor rotor position that C, motor speed computing unit feed back according to position sensor circuit; D, calculate the change of current advance angle of weak magnetic control system according to given current signal and motor speed by weak magnetic degree computing unit; E, change of current position calculation unit are determined change of current position according to current motor rotor position; F, determine the PWM order of occurrence according to duty cycle signals, change of current advance angle and change of current position and take place constantly, and pass the signal to the three-phase voltage inverter circuit by synchronous pulse-width modulation (PWM) generation unit; G, realize control to permanent magnetic brushless by the three-phase voltage inverter circuit.
This method can realize by the permanent magnetic brushless control device of the following stated.A kind of permanent magnetic brushless control device, this device comprises electric machine controller 1, it is characterized in that electric machine controller 1 is connected with motor control unit 2, motor control unit 2 is connected with drive signal buffer circuit 9, drive signal buffer circuit 9 is connected with three-phase voltage inverter circuit 3, three-phase voltage inverter circuit 3 is connected with permanent magnetic brushless 4, and permanent magnetic brushless 4 also is connected with position sensing circuit 5, and position sensing circuit 5 is connected with motor control unit 2.
Wherein motor control unit 2 comprises current function unit 21, the first input end of current function unit 21 is connected with first output of electric machine controller 1, the output of current function unit 21 is connected with the input of current regulation unit 22, the output of current function unit 21 also is connected with the first input end of weak magnetic degree computing unit 23, the output of current regulation unit 22 is connected with the first input end of synchronous PWM generation unit 26, the output that weak magnetic potential is put computing unit 23 is connected with second input of synchronous PWM generation unit 26, first output of motor speed computing unit 24 is connected with the input that weak magnetic potential is put computing unit 23, second output of motor speed computing unit 24 is connected with second input of current function unit 21, the input of motor speed computing unit 24 is connected with the output of position sensing circuit 5, the output of position sensing circuit 5 also is connected with the input of change of current computing unit 25, the output of change of current computing unit 25 is connected with the 3rd input of synchronous PWM generation unit 26, second output of electric machine controller 1 is connected with the four-input terminal of synchronous PWM generation unit 26, and the output of PWM generation unit 26 is connected with the input of three-phase voltage inverter circuit 3 synchronously.
This device also comprises phase current sampling circuit 6, processes temperature signal circuit 7, and voltage signal processing circuit 8, the input of phase current sampling circuit is connected with permanent magnetic brushless, and the output of phase current sampling circuit is connected with the input of synchronous PWM generation unit; The first input end of processes temperature signal circuit is connected with permanent magnetic brushless, and second input of processes temperature signal circuit is connected with the three-phase voltage inverter circuit, and the output of processes temperature signal circuit is connected with the input of synchronous PWM generation unit; The input of voltage signal processing circuit is connected with the input of three-phase voltage inverter circuit, and the output of voltage signal processing circuit is connected with the input of synchronous PWM generation unit.
Wherein the circuit of three-phase voltage inverter circuit 3 as shown in Figure 2.Among the figure, U dBe the DC loop power supply, adopt the aluminium ion battery pile, its output voltage range is 300~360VDC, and the maximum current that can provide is 250A; C dBe intermediate dc loop filter electric capacity, adopt the alminium electrolytic condenser of 2700uF/450VDC; Three-phase inverting circuit adopts Mitsubishi PM600DSA060 IPM power model to form three-phase brachium pontis 31,32,33; The three-phase inverting circuit output voltage (0~312VAC) and frequency (0~800Hz) adjustable three-phase alternating current drives the permanent magnetic brushless operation; Position sensing circuit is used for detecting in real time the rotor-position of permanent magnetic brushless, it is SS41 hall signal transducer that position transducer adopts model, three-phase rotor-position from the permanent magnetic brushless position transducer, behind rc filter circuit, send into Schmitt trigger circuit, three-phase rotor-position signal after Schmidt trigger circuit output is handled is given motor control unit, and a phase rotor-position signal treatment circuit as shown in Figure 3; The phase current sampling circuit is used to detect the permanent magnetic brushless three-phase current, as shown in Figure 4, the current sensor model is the BLF500-S7 of LEM company, place the permanent magnetic brushless three-phase input end, the current sensor output signal is at first carried out Filtering Processing by the step low-pass active filter circuit, through biasing circuit the AC signal of electric current is biased to direct current signal, send motor control unit at last; Temperature sampling circuit is used for controller temperature and motor temperature are handled respectively, its middle controller temperature signal adopts power model installation base plate temperature, motor temperature adopts stator winding temperature, it is the temperature sensor of HEL-776 that temperature detection adopts model, temperature sensor output signal is converted to voltage signal through constant-current source, after difference amplification and filter circuit processing, send motor control unit then, as shown in Figure 5; Among Fig. 3, also establish module failure treatment circuit 10 between three-phase inverting circuit and the motor control unit, be used for that the fault-signal that the three phase power module is exported is carried out line and send motor control unit with back output one road resultant fault signal, the circuit of module failure treatment circuit 10 as shown in Figure 6; The voltage signal testing circuit is used to detect DC bus-bar voltage, DC bus-bar voltage adopts the LEM LV28-P of company current mode voltage sensor, and the voltage sensor output signal is after the single order active low-pass filter circuit is handled, and big circuit veers away, send motor control unit then, as shown in Figure 7; Motor control unit is accepted the voltage signal of the controller temperature of three-phase current signal, temperature sensing circuit of three-phase rotor-position signal, phase current testing circuit from position transducer and motor temperature signal, voltage signal processing circuit, and according to torque instruction, motor enable signal, motor steering signal and traction/brake signal control output six road pwm signals from electric machine controller; Six road pwm signals send the three phase power module through the drive signal buffer circuit, and the buffer circuit of one road PWM drive signal as shown in Figure 8; Electric machine controller receives from bus signals, and Fig. 9 function is seen patent ZL03229228.7.
According to one embodiment of present invention, motor control unit is realized by software.The software flow pattern of realizing is as shown in figure 10:
Motor control unit 2 enters by timer underflow and interrupt to realize, timer adopts increase and decrease counting continuously, and timer is started from scratch earlier and increased counting, subtracts counting after counting down to maximum, up to counting down to zero again, a underflow interruption takes place; Timer is started from scratch again and is increased counting, so goes round and begins again, and guarantees to recur break period.After the timer underflow interrupt event takes place, the timer control register produces an interrupt requests sign and an interruption offset vector to microprocessor, microprocessor produces software interrupt by detecting the interrupt requests sign, and changes corresponding interrupt routine over to according to interrupting offset vector.
After entering interruption 101, at first enter module 102, read in current function table and weak magnetic deviation kilsyth basalt by current function unit 21, the current function form all instructs by the parameter of electric machine is calculated according to electromagnetic torques different under the different motor speeds with weak magnetic degree form, the abscissa of form is a motor speed, ordinate is the electromagnetic torque instruction, and the comprehensive required control precision that reaches of the resolution of rotating speed and torque instruction and the corresponding parameter of electric machine obtain.
After reading in current function table and weak magnetic deviation kilsyth basalt, enter module 103, read in the motor rotor position signal that position sensing circuit 5 is exported by motor speed computing unit 24, the change calculations of spending the high-low level of electrical degrees according to the rotor-position signal of motor per 60 obtains the present position of current rotor.Computational methods regulations is as follows: during definition rotor-position signal high level is 1, is 0 during low level, and three-phase rotor-position signal mutual deviation 120 degree electrical degrees in time.Be rotated in the forward with motor and be example, when motor revolved the three-sixth turn electrical degree, corresponding rotor-position signal situation of change was for as shown in figure 11.Among Figure 11, the rotor-position signal when motor is rotated in the forward is in proper order: 546231.
In module 104, motor speed computing unit 24 is according to the detected three-phase hall signal of position sensing circuit, utilization frequency measurement method principle, in the given time (0.100s), be that the number of times m (every variation once increases by 60 electrical degrees) that signal changes calculates current motor speed in real time by detecting rotor; The number of pole-pairs of supposing motor is p, and then computing formula is as follows:
n = 60 · m 6 p · 1 0.100 s = 100 m p ( rpm )
Carry out signal sampling by synchronous PWM generation unit 26 then, signal sampling comprises the sampling to the fault-signal of electric machine phase current, DC bus-bar voltage, controller temperature, motor temperature and power model.In module 105, phase current sampling is by sampling to three-phase current simultaneously, relatively tries to achieve wherein maximum as the average peak electric current of current electric machine phase current, and this average peak electric current as current ratio and the feedback current value in the regulon.The DC bus-bar voltage sample objects is the voltage at two ends, intermediate dc loop (filter capacitor), mainly judges as in the software whether DC bus-bar voltage is normal.In module 106, the controller temperature is chosen mounting plane (radiator) temperature of power model as the controller temperature feedback signal, with doing that controller is carried out temperature protection; Motor temperature is chosen stator winding temperature as the motor temperature feedback signal, with doing that motor is carried out temperature protection.In module 107, read in the fault-signal of power model.
In module 108, according to module 105, resulting signal in 106 and 107, by electric machine phase current whether in the scope of normal current-480~480A, judge that DC bus-bar voltage is whether in the scope of normal voltage 250~360V, whether the controller temperature is lower than the maximum operating temperature of 85 degree, whether motor temperature is lower than the maximum operating temperature of 130 degree, whether and whether the fault-signal of power model be 1, come failure judgement to take place with this, in this way, then enter module 109, by pulse blocking, close pwm signal, go out to interrupt then (module 120).As not, then enter module 110, by current function unit 21 according to current-order that receives and current motor speed, by looking into the controlled required current-order of current function form.
Then in module 111, carry out electric machine phase current comparison and adjusting by current regulation unit 22, the current feedback signal that Current Control instruction and sampling from the current function table are obtained compares, the passing ratio integral controller is regulated output control and is produced needed duty ratio (pulsewidth) signal by PWM;
Then in module 112, carry out weak magnetic degree of advance by weak magnetic degree computing unit 23 and calculate.The weak magnetic control controlling angle control of permanent magnetic brushless is divided into two class angles: the phase current that the armature reaction that a class produces owing to stator current for counteracting causes lags behind the angle of motor opposite potential; Another kind of for weakening the needed electric current advance angle in motor gas-gap magnetic field, the electric current degree of advance under the actual weak magnetic operating mode is formed in the stack of two kinds of angles.
Module 113 judges whether weak magnetic degree of advance is zero.
When weak magnetic degree of advance is zero, carries out normal change of current position calculation (module 116) by change of current position calculation unit 25, and just changing stream (module 117).The conducting of six switching tubes order is as shown in figure 11 in the three-phase inverting circuit of different motor rotor position correspondences in the corresponding normal change of current program.As shown in table 1 below by the conducting order that Figure 11 obtains:
HALL state and the corresponding relation of opening power tube when table 1 is just changeing
The HALL state O11 001 101 1OO 11O 01O
The conducting power tube T 4T 5 T 5T 6 T 6T 1 T 1T 2 T 2T 3 T 3T 4
When weak magnetic degree of advance is non-vanishing, carry out weak magnetic by change of current position calculation unit 25 and shift to an earlier date change of current position calculation (module 114), and magnetic shifts to an earlier date the change of current (module 115) a little less than carrying out.The conducting order that corresponding weak magnetic shifts to an earlier date six switching tubes in the three-phase inverting circuit of motor rotor position correspondences different in the change of current program as shown in figure 12.As shown in table 2 below by the conducting order that Figure 12 obtains:
HALL state and the corresponding relation of opening power tube when table 2 is just changeing
The HALL state O11 001 1O1 100 11O 010
The conducting power tube T 5T 6 T 6T 1 T 1T 2 T 2T 3 T 3T 4 T 4T 5
Then in module 118, the PWM generation unit is used to drive the work of three-phase voltage inverter circuit power tube switch according to from the weak magnetic control controlling angle of weak magnetic degree computing unit, from the change of current order of change of current position control unit, from the duty cycle signals of current regulator unit and motor operational mode (enable/disable), motor steering (just changeing/reverse) and motor operating state (traction/braking) the control output three synchronised pwm signals that acceptance obtains from electric machine controller bus communication circuit synchronously.Go out to interrupt at last (module 119).
The permanent magnetic brushless control system that is used for electric automobile communicates by CAN (Industry Control local area network (LAN)) bus and car load, realizes the real-time control to motor.Below in conjunction with description of drawings.
Figure 13 is the hard-wired structured flowchart of CAN communication, and Figure 14 is the hard-wired circuit theory diagrams of CAN communication.The dsp controller chip adopts the TI high speed numerical processor TMS320C240 DSP of company in the electric machine controller 1, adopts the CAN bus control unit SJA1000 and the CAN bus transceiver 82C250 chip of PHILIPS company in the communication interface.Because the internal structure of DSP is improved Harvard structure, adopt parallel program and data bus structure, can carry out simultaneously the visit of data and program; And SJA1000 adopts the von Neumann structure, has only data/address bus, the visit of data and program is undertaken by the data/address bus time-sharing multiplex, so need by the contradiction between FPGA (Field Programmable Gate Array) control solution DSP of employing and the SJA1000 read-write sequence.The present invention proposes to adopt Verilog HDL that programmable logic device IM4A5-64/32 ISP is carried out programming in logic, thus solved DSP and CAN bus control unit SJA1000 read-write sequence between contradiction.
The CAN bus transceiver of electric machine controller is by the signal of CAN bus reception from entire car controller, after light-coupled isolation, send to the CAN bus control unit, by programmable logic device dsp controller is transmitted after the CAN bus control unit received signal, receive the CAN bus signals by dsp controller at last; Simultaneously, signal from dsp controller sends to the CAN controller by programmable logic device, the CAN controller sends to the CAN bus transceiver through light-coupled isolation after receiving, send to entire car controller by the CAN bus by the CAN bus transceiver at last, thereby the signal of finishing between electric machine controller and the entire car controller transmits.

Claims (6)

1, a kind of control method of permanent magnetic brushless is characterized in that the method includes the steps of: A, will convert given current signal to by the current function table from the tach signal of given signal of the torque of car load and motor speed computing unit by the current function unit; B, given electric current and the feedback current that is fed back by the phase current sampling circuit are handled the output duty cycle signal by current regulation unit; Current motor rotor position calculated signals motor speed and current motor rotor position that C, motor speed computing unit feed back according to position sensor circuit; D, calculate the change of current advance angle of weak magnetic control system according to given current signal and motor speed by weak magnetic degree computing unit; E, change of current position calculation unit are determined change of current position according to current motor rotor position; F, determine the PWM order of occurrence according to duty cycle signals, change of current advance angle and change of current position and take place constantly, and pass the signal to the three-phase voltage inverter circuit by synchronous PWM generation unit; G, realize control to permanent magnetic brushless by the three-phase voltage inverter circuit.
2, the control method of permanent magnetic brushless as claimed in claim 1 is characterized in that this method also comprises: the step of fault-signal sampling step and troubleshooting.
3, the control method of permanent magnetic brushless as claimed in claim 2 is characterized in that fault-signal comprises the fault-signal of electric machine phase current signal, DC bus-bar voltage signal, controller temperature signal, motor temperature signal and power model.
4, a kind of permanent magnetic brushless control device, this device comprises electric machine controller, it is characterized in that electric machine controller is connected with motor control unit, motor control unit is connected with the three-phase voltage inverter circuit, the three-phase voltage inverter circuit is connected with permanent magnetic brushless, permanent magnetic brushless also is connected with position sensing circuit, and position sensing circuit is connected with motor control unit.
5, permanent magnetic brushless control device as claimed in claim 4, it is characterized in that motor control unit comprises the current function unit, the first input end of current function unit is connected with first output of electric machine controller, the output of current function unit is connected with the input of current regulation unit, the output of current function unit also is connected with the first input end of weak magnetic degree computing unit, the output of current regulation unit is connected with the first input end of synchronous PWM generation unit, the output that weak magnetic potential is put computing unit is connected with second input of synchronous PWM generation unit, first output of motor speed computing unit is connected with the input that weak magnetic potential is put computing unit, second output of motor speed computing unit is connected with second input of current function unit, the input of motor speed computing unit is connected with the output of position sensing circuit, the output of position sensing circuit also is connected with the input of change of current computing unit, the output of change of current computing unit is connected with the 3rd input of synchronous PWM generation unit, second output of electric machine controller is connected with the four-input terminal of synchronous PWM generation unit, and the output of PWM generation unit is connected with the input of three-phase voltage inverter circuit synchronously.
6, permanent magnetic brushless control device as claimed in claim 5, it is characterized in that this device also comprises the phase current sampling circuit, the processes temperature signal circuit, voltage signal processing circuit, the input of phase current sampling circuit is connected with permanent magnetic brushless, and the output of phase current sampling circuit is connected with the input of synchronous PWM generation unit; The first input end of processes temperature signal circuit is connected with permanent magnetic brushless, and second input of processes temperature signal circuit is connected with the three-phase voltage inverter circuit, and the output of processes temperature signal circuit is connected with the input of synchronous PWM generation unit; The input of voltage signal processing circuit is connected with the input of three-phase voltage inverter circuit, and the output of voltage signal processing circuit is connected with the input of synchronous PWM generation unit.
CNA2005101101000A 2005-11-07 2005-11-07 A control method and device for permanently magnetic brushless motor Pending CN1964179A (en)

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CN101594105B (en) * 2008-07-09 2012-05-16 崇贸科技股份有限公司 A control circuit of a brushless DC motor
CN101355337B (en) * 2008-08-19 2010-06-02 华南理工大学 Control method for driving permanent magnet synchronous motor base on magnetic field orthotropic control
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