CN102624298B - Motor - Google Patents
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- CN102624298B CN102624298B CN201210018000.5A CN201210018000A CN102624298B CN 102624298 B CN102624298 B CN 102624298B CN 201210018000 A CN201210018000 A CN 201210018000A CN 102624298 B CN102624298 B CN 102624298B
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- 230000000052 comparative effect Effects 0.000 claims abstract description 24
- 230000008859 change Effects 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 10
- 238000011144 upstream manufacturing Methods 0.000 description 10
- 230000000630 rising effect Effects 0.000 description 6
- 239000000758 substrate Substances 0.000 description 6
- 230000033228 biological regulation Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000009467 reduction Effects 0.000 description 5
- 238000005259 measurement Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000004378 air conditioning Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
- H02P27/08—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters with pulse width modulation
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P23/00—Arrangements or methods for the control of AC motors characterised by a control method other than vector control
- H02P23/14—Estimation or adaptation of motor parameters, e.g. rotor time constant, flux, speed, current or voltage
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P2209/00—Indexing scheme relating to controlling arrangements characterised by the waveform of the supplied voltage or current
- H02P2209/07—Trapezoidal waveform
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P2209/00—Indexing scheme relating to controlling arrangements characterised by the waveform of the supplied voltage or current
- H02P2209/11—Sinusoidal waveform
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/14—Electronic commutators
- H02P6/16—Circuit arrangements for detecting position
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The present invention provides motor.Motor (1) includes inverter circuit (20) and control circuit (30).Each phase that inverter circuit (20) will drive electric current to be supplied to coil.Control circuit (30), according to predetermined input signal, controls inverter circuit (20) by PWM mode, drives rotor (3) with predetermined rotary speed.Control circuit (30) includes waveform switch configuration part (34), comparing section (35) and power on signal forming portion (39).Waveform switch configuration part (34) exports predetermined reference value set in advance.Described input signal and described reference value are compared by comparing section (35).Power on signal forming portion (39) switches to according to the comparative result signal exported from comparing section (35) and executes the 1st step mode that alive waveform is rectangle and execute alive waveform is trapezoidal or the 2nd step mode of sinusoidal.
Description
Technical field
The present invention relates to and control the motor of the energising to heterogeneous coil by PWM (pulsewidthmodulation: pulsewidth modulation) mode.Wherein, the technology controlling to put on the conductive waveform of the voltage of each phase is particularly related to.
Background technology
As the control mode of motor, it is generally adopted conductive waveform to be rectangular-shaped step mode (square wave energising), conductive waveform is the step mode (sinusoidal wave energising) of sinusoidal.
When being energized for square wave, the frequency owing to being switched on or switched off switch element is low, so there being the advantage that switching loss is little.But, the utilization rate of induced voltage is low, it is easy to produce vibration or noise.
On the other hand, when for sinusoidal wave energising, just can improve the utilization rate of induced voltage, reduce vibration or noise.But, due to altofrequency be switched on or switched off switch element, so there is the shortcoming that switching loss is big.
Therefore, it is also proposed that have and conductive waveform is set to trapezoidal step mode (trapezoidal wave energising) (such as, being disclosed in Japanese Unexamined Patent Publication 2006-6067 publication, Japanese Unexamined Patent Publication 2003-18878 publication).Trapezoidal wave is compared with square wave, and its waveform is similar to sine curve.Therefore, make its action by motor is carried out trapezoidal wave energising, just can reduce vibration or the noise of motor.Additionally, trapezoidal wave energising and sinusoidal wave energized phase ratio, due to it, to be switched on or switched off the frequency of switch element low, so switching loss can also be reduced.
Japanese Unexamined Patent Publication 2003-18878 publication discloses the rotary speed according to motor and makes energising width or the control method of optimizing phase change.Japanese Unexamined Patent Publication 2003-18878 publication discloses the control method that use Hall element carrys out the rotary speed of practical measurement motor.
As disclosed in Japanese Unexamined Patent Publication 2006-6067 publication and Japanese Unexamined Patent Publication 2003-18878 publication, by motor is carried out trapezoidal wave energising, with motor is carried out square wave energising and sinusoidal wave energized phase ratio, just can realize the reduction of the noise in motor and vibration and the reduction of switching loss more evenly.
Summary of the invention
Motor disclosed in the present application includes rotor, stator, inverter circuit and control circuit.Described rotor pivots about with rotating shaft and includes being constituted the Magnet of multiple magnetic pole.Described stator is separated with coil that is relative with gap and that include constituting multiple phase with described rotor.Each phase that described inverter circuit will drive electric current to be supplied to described coil.Described control circuit includes waveform switch configuration part, comparing section and power on signal forming portion.Described control circuit controls described inverter circuit according to predetermined input signal by PWM mode, drives described rotor with predetermined rotary speed.
Described waveform switch configuration part, in order to be switched to the 1st step mode and the 2nd step mode, exports predetermined reference value set in advance.In described 1st step mode, the alive waveform of executing during energising is rectangle.In described 2nd step mode, the alive waveform of executing during energising is trapezoidal or sinusoidal.Described input signal and described reference value are compared by described comparing section, export comparative result signal.Described power on signal forming portion switches described 1st step mode and described 2nd step mode according to the described comparative result signal exported from described comparing section.
Accompanying drawing explanation
Fig. 1 is a preferred example of the synoptic diagram of the structure of the motor illustrating the present invention.
Fig. 2 is a preferred example of the block diagram of the structure of the motor illustrating the 1st embodiment.
Fig. 3 A is the oscillogram of square wave energising.
Fig. 3 B is the oscillogram of trapezoidal wave energising.
Fig. 4 A is the sequential chart of hall signal.
Fig. 4 B is the sequential chart of the power on signal under square wave energising.
Fig. 4 C is the sequential chart of the power on signal under trapezoidal wave energising.
Fig. 5 is a preferred example of the curve chart of the moyor corresponding with entering angle value.
Fig. 6 A is the sequential chart of hall signal.
Fig. 6 B is the sequential chart of the power on signal under square wave energising.
Fig. 6 C is the sequential chart of the power on signal under trapezoidal wave energising.
Fig. 6 D be trapezoidal wave energising under execute alive oscillogram.
Fig. 7 is a preferred example of the block diagram of the structure of the motor illustrating the 2nd embodiment.
Fig. 8 is a preferred example of the block diagram of the structure of the motor illustrating the 3rd embodiment.
Detailed description of the invention
Hereinafter, embodiments of the present invention are described in detail with reference to the accompanying drawings.But, the following description is only example in itself, the invention is not restricted to its applicable thing or its purposes.
<the 1st embodiment>
Fig. 1 illustrates a preferred example of the summary of the motor 1 of the 1st embodiment.Motor 1 is such as the brushless DC motor of the blowing fan etc. for air-conditioning.Motor 1 includes axle 2, rotor 3, stator 4, Hall element 5 (object lesson of position detection unit) and circuit substrate 6.
Rotor 3 can be supported on motor shell 7 freely rotatably via axle 2.Rotor 3 pivots about with rotating shaft J along with axle 2.Rotor 3 is formed the drum centered by rotating shaft J.Rotor 3 includes the Magnet 3a constituting multiple magnetic pole.It is alternately arranged in the circumferential direction centered by rotating shaft J about the magnetic pole of Magnet 3a, N pole and S pole.
Stator 4 is configured in motor shell 7 being separated with state relative with gap with rotor 3.Stator 4 includes multiple coil 4a.Multiple coil 4a such as by U phase, V phase, W phase multiple phases constitute.
Coil 4a is configured at the circumferential direction of stator 4, adopts Y wiring or Δ wiring to carry out wiring according to the specification of motor 1.By the coil 4a that electric current supply wiring 8 will drive electric current to be supplied to each phase from circuit substrate 6 according to predefined procedure.By driving the supply of electric current, the coil 4a of each phase is by excitation successively.Producing torque between the coil 4a being excited and Magnet 3a, rotor 3 is rotated by the effect of this torque.
Hall element 5 is configured near rotor 3.Such as it is configured with 3 Hall elements 5 with the interval of electrical angle 120 degree.Hall element 5 detects the pole change of the rotation along with rotor 3.The hall signal that Hall element 5 detects is sent to the circuit substrate 6 being configured in motor shell 7.Circuit substrate 6 electrically connects with outside device 9.Power supply is supplied to circuit substrate 6 by outside device 9.Circuit substrate 6 includes inverter circuit 20 and control circuit 30.
In fig. 2 it is shown that a preferred example of the block diagram of motor 1, this diagram show inverter circuit 20 and the detailed construction of control circuit 30.
Inverter circuit 20 includes 6 switch elements 22.Switch element 22 can be made up of transistor, in the present embodiment, as an example of transistor, for instance realized by MOS field-effect transistor.Switch element 22 includes upstream side switch element 22a and downstream switch element 22b.Upstream side switch element 22a and downstream switch element 22b is connected in series and constitutes an element group.And, these element groups are parallel with 3.Electric current supply wiring 8 it has been electrically connected between the upstream side switch element 22a and downstream switch element 22b of each element group.Specifically, the drain electrode of each upstream side switch element 22a is connected to the input terminal of driving voltage Vm, and the source electrode of each upstream side switch element 22a is connected to downstream switch element 22b.Each upstream side switch element 22a and each downstream switch element 22b, by controlling to put on the voltage of grid, is switched to and is switched on or switched off.One end of electric current supply wiring 8 is connected to upstream side switch element 22a and the node of downstream switch element 22b.The other end of electric current supply wiring 8 is connected to coil 4a.
Switch element 22 is switched to according to the power on signal exported from control circuit 30 and is switched on or switched off.From power supply, the voltage Vm driven is put on inverter circuit 20.And, some of some in predetermined timing, upstream side switch element 22a and downstream switch element 22b is turned on.Thus, the coil 3a of each phase applies driving voltage, supplies driving electric current.
Inverter current 20 is connected to shunt resistance 25.Shunt resistance 25 is connected in series with switch element group in the downstream of switch element group.Specifically, shunt resistance 25 is connected with the source series of downstream switch element 22b.
Control circuit 30 can not use microcontroller, but IC is combined and constitutes.More less expensive than being constituted control circuit 30 with microcontroller sometimes through being constituted control circuit 30 with IC.From power supply, the voltage vcc controlled is applied to most of region (region in the dotted line of Fig. 2) of control circuit 30.It is input to control circuit 30 from the outside of motor 1 by speed instruction voltage Vsp (object lesson of input signal).Control circuit 30 controls inverter circuit 20 according to speed instruction voltage Vsp by PWM mode.Thus, rotor 3 is driven with the predetermined rotating speed based on speed instruction voltage Vsp.
It addition, speed instruction voltage Vsp is not offered as the practical measurement value of rotary speed.For example it is assumed that motor 1 is used for driving the situation of the fan of air-conditioning.Now, when user has carried out the operation changing air quantity, it is necessary to change the rotating speed of motor 1.Speed instruction voltage Vsp be with such operations linkage be input to the indication signal of control circuit 30.
Control circuit 30 has following function: execute alive waveform (also referred to as conductive waveform) when changing energising, switches step mode.Specifically, control circuit 30 allow hand over to the square wave step mode (the 1st step mode) that conductive waveform is rectangle and conductive waveform be trapezoidal trapezoidal wave step mode (the 2nd step mode).
Fig. 3 A is the oscillogram of the conductive waveform of square wave energising.Fig. 3 B is the oscillogram of the conductive waveform of trapezoidal wave energising.
In square wave is energized, for instance, there is during there is during there is during being energized " 120 degree of energisings " of the electrical angle of 120 degree, energising " 150 degree of energisings " of the electrical angle of 150 degree, energising " 180 degree of energisings " of the electrical angle of 180 degree etc..Waveform in trapezoidal wave energising is to generate based on the conductive waveform that these square waves are energized.
The purposes of the equipment according to use motor and specification, produce noise even if existing or vibrate the region (also referred to as noise admissible region) of the rotating speed also can allowed.Therefore, motor 1 is advantageously reduced the trapezoidal wave energising of noise etc. by control circuit 30 in common rotary speed area, and motor 1 advantageously reduces the square wave energising of switching loss in noise admissible region.Such as, motor 1 is carried out trapezoidal wave energising in the region of predetermined low speed rotation by control circuit 30, in the region of predetermined high speed rotating, motor 1 is carried out square wave energising.Additionally, motor 1 can also be carried out square wave energising in the region of predetermined low speed rotation by control circuit 30, in the region of predetermined high speed rotating, motor 1 is carried out trapezoidal wave energising.
That is, motor 1 is by control circuit 30, switches to optimal step mode according to the rotating speed of rotor 3.By so switching square wave energising and the structure of trapezoidal wave energising, compared with the situation of some carried out all the time in square wave energising and trapezoidal wave energising, just can reduce in motor noise etc. and the switching loss of generation more evenly.
Control circuit 30 includes PWM control portion 32, position of rotation calculating part 33, waveform switch configuration part 34, comparing section 35, phase correction section 36, input voltage regulation portion 37, timing control part 38, power on signal forming portion 39, upper brachium pontis drive circuit 40 and lower brachium pontis drive circuit 41.
PWM control portion 32 has following function: generate the pwm signal of the rotating speed based on required rotor 3.Specifically, in comparator 44, compare the triangular wave from triangular wave oscillating circuit 43 output and speed instruction voltage Vsp.PWM control portion 32 generates pwm signal according to the comparative result of comparator 44.The pwm signal of generation is exported timing control part 38 by PWM control portion 32.
Position of rotation calculating part 33 has following function: with the position of rotation that Hall element 5 co-operating carrys out practical measurement rotor 3.Specifically, the hall signal exported from Hall element 5 is input to position of rotation calculating part 33.Position of rotation calculating part 33 calculates the position of rotation of rotor 3 according to hall signal.The information of the position of rotation of the rotor 3 calculated is exported timing control part 38 as rotating position signal.
Waveform switch configuration part 34 has following function: output is for the reference value of the switching of step mode.Specifically, in waveform switch configuration part 34, storage has the information of the reference value pre-entered.The information of stored reference value exports comparing section 35.In the 1st embodiment, the scheduled voltage corresponding with speed instruction voltage Vsp is used as reference value.
Comparing section 35 has following function: speed instruction voltage Vsp and reference value are compared, and exports the signal (comparative result signal) relevant to its comparative result.Such as, if speed instruction voltage Vsp is more than reference value, then the 1st signal that comparator 35 output is energized for selecting square wave.If additionally, speed instruction voltage Vsp is less than reference value, then the 2nd signal that comparator 35 output is energized for selecting trapezoidal wave.The comparative result signal of the 1st signal etc. exports phase correction section 36 and power on signal forming portion 39.
When the rotary speed of rotor 3 changes, the phase place of conductive waveform can produce deviation.Even if additionally, switch step mode just when rotated at rotor 3, deviation also can be produced in the phase place of conductive waveform.This is because, in square wave energising and the energising of platform shape ripple, the shape of conductive waveform and different during energising.
Fig. 4 A is the sequential chart illustrating hall signal.Fig. 4 B is the sequential chart illustrating power on signal when rectangle is energized.Fig. 4 C is the sequential chart illustrating power on signal when trapezoidal wave is energized.It addition, trapezoidal wave energising rising and decline partially due to formed inclined wave, so controlling to carry out modulating pulse width by PWM.Power on signal shown in Fig. 4 C is modulated with the pulse of 4 grades, and number of modulation levels is not limited to " 4 ", for instance, even if adopting 8 grades of grades also can be modulated.
The rising edge of the conductive waveform in trapezoidal wave energising is compared with the rising edge of the conductive waveform in square wave energising, and its phase place is in advance (entering angle).It is therefoie, for example, when switching to square wave energising from trapezoidal wave energising, if using the phase place of trapezoidal wave energising same as before, then as shown in two chain-dotted lines of Fig. 4 B, this enters the amount at angle in advance in square wave energising.
As shown in Figure 4 B, the energising width of square wave energising is scaled electrical angle is then 150 °.On the other hand, as shown in Figure 4 C, the energising width of the rectangle part of trapezoidal wave energising is scaled electrical angle is then 150 °.Energising width in trapezoidal wave energising is by rectangle part that electrical angle is 150 ° and has carried out the energising width that after the modulating part that electrical angle is 7.5 ° of pulse width modulation overlaps, electrical angle is 165 ° in the front and back of rectangle part.Thus, the rising edge of the conductive waveform in trapezoidal wave energising is different from the position of the rising edge of the conductive waveform in square wave energising.In this state, when switching square wave energising and trapezoidal wave energising, the phase place of conductive waveform produces deviation.Owing to the phase place of conductive waveform produces deviation, therefore, the rotating speed of rotor 3 steeply rises or declines, and produces noise and vibration.
Additionally, as it is shown in figure 5, when invariablenes turning speed, it is shown that the moyor corresponding from entering angle value as a result, most suitable enter angle value be different in square wave energising and trapezoidal wave are energized.It addition, the curve chart shown in Fig. 5 is an example, the characteristic of square wave energising sometimes and trapezoidal wave energising can change according to the specification of motor or load.Thus, although to be electrical angle be in square wave the is energized energising width of 150 °, but, in being energized preferably in trapezoidal wave, it is provided with, before and after the square wave energising that electrical angle is 135 °, the pulse width modulation portion etc. that electrical angle is 15 °, is corrected to most suitable electrical angle (phase place of correction conductive waveform) according to the specification of motor.
Phase correction section 36 has following function: with input voltage regulation portion 37 co-operating, correct the deviation of the phase place of conductive waveform.The velocity correction information that input voltage regulation portion 37 storage is corresponding with speed instruction voltage Vsp.Velocity correction information is the relevant information of correcting value of speed instruction voltage Vsp, namely corresponding to rotary speed suitable phase place.As concrete phasing action, first, speed instruction voltage Vsp is input to input voltage regulation portion 37.Input voltage regulation portion 37, in order to be exported phase correction section 36 and be adjusted to most suitable voltage by the speed instruction voltage Vsp of input, exports phase correction section 36 as entering angle setting voltage.
Comparative result signal is input to phase correction section 36 from comparing section 35.Phase correction section 36 judges square wave energising or trapezoidal wave energising with reference to comparative result signal.Phase correction section 36 is preset with velocity correction information and waveform correction information.Velocity correction information is speed instruction voltage Vsp, namely relevant to the correcting value of the suitable phase place corresponding to rotary speed information.Waveform correction information is the information relevant to the correcting value of the suitable phase place corresponding to conductive waveform.Phase correction section 36 generates the positively related control information with the school of comprehensive phase place according to waveform correction information and velocity correction information.The correction signal relevant to the control information generated in phase correction section 36 is output to timing control part 38.
Timing control part 38 has following function: the rotating position signal according to the pwm signal exported from PWM control portion 32 and from position of rotation calculating part 33 output controls the timing of energising.Timing control part 38 generates the timing information relevant to each timing being initially powered up mutually in coil groups according to pwm signal with rotating position signal.
And, timing control part 38 has following function: according to the correction signal exported from phase correction section 36, the timing information that correction generates.Therefore, even if there is the change of the rotating speed of rotor 3 or the switching of step mode, it is possible to conductive waveform to be corrected to suitable phase place.So, so that it may the motor performance played stably.Timing information after correction exports power on signal forming portion 39 as timing signal.
Comparative result signal is input to power on signal forming portion 39 from comparing section 35.Power on signal forming portion 39 generates power on signal according to comparative result signal and timing signal.Power on signal forming portion 39 is according to the power on signal of some step mode in comparative result signal rectangular ripple energising in next life and trapezoidal wave energising.Therefore, when different comparative result signals is input to power on signal forming portion 39, step mode switches.The power on signal of generation is exported upper brachium pontis drive circuit 40 and lower brachium pontis drive circuit 41 by power on signal forming portion 39.
Upper brachium pontis drive circuit 40 and lower brachium pontis drive circuit 41 control switch element 22 according to power on signal respectively.Specifically, predetermined upstream side switch element 22a is set to be switched on or switched off by upper brachium pontis drive circuit 40 in the timing Tong Bu with power on signal.Predetermined downstream switch element 22b is set to be switched on or switched off by lower brachium pontis drive circuit 41 in the timing Tong Bu with power on signal.
Fig. 6 A is the sequential chart illustrating hall signal.Fig. 6 B is the sequential chart of the power on signal in the square wave energising of the hall signal being shown for Fig. 6 A.Fig. 6 C is the sequential chart of the power on signal in the trapezoidal wave energising of the hall signal for Fig. 6 A.Fig. 6 D illustrates that what the coil groups corresponding with Fig. 6 C each went up mutually executes alive oscillogram.It addition, the dash area of Fig. 6 C illustrates the part (with reference to Fig. 4 C) that pulse-width is modulated.UH, VH, WH in Fig. 6 B and Fig. 6 C is the power on signal of the upstream side switch element 22a being separately input to 3 arcs.UL, VL, WL in Fig. 6 B and Fig. 6 C is the power on signal being separately input to 3 downstream switch element 22b.Sequential chart shown in Fig. 6 A～Fig. 6 C is an example of preferred power on signal.Oscillogram shown in Fig. 6 D be coil groups execute an alive preferred example.
Motor 1 can switch step mode according to rotating speed in rotation.Therefore, the reduction of noise and vibration and the reduction of switching loss can just be realized more evenly.Owing to the switching of step mode carries out according to speed instruction voltage Vsp, so need not high-precision calculation process.Therefore, it is possible to simplified control circuit 30 so that it is inexpensively.
Additionally, when switching step mode in rotation, by correcting the phase place of power on signal, it is possible to prevent the noise and the vibration that cause because of the deviation of phase place.Additionally, when have switched step mode, according to step mode be corrected to different most suitable enter angle value, improve moyor.
Such as, motor 1 is suitable to the equipment that the cogging with rotation speed change is little.
<the 2nd embodiment>
The example of speed instruction voltage Vsp is employed in the input signal shown in the 1st embodiment.2nd embodiment illustrates the preferred example that Shunt Voltage VRs is used for inputting signal.It addition, the basic structure of the 2nd embodiment is identical with the 1st embodiment.Therefore, in the structure of identical function use same-sign and the description thereof will be omitted.
Figure 7 illustrates a preferred example of block diagram, this diagram show the details of the motor 1A of the 2nd embodiment.As it is shown in fig. 7, the control circuit 30 of motor 1A includes Shunt Voltage generating unit 51.Shunt Voltage generating unit 51 detects the voltage putting on shunt resistance 25 according to the electric current flow through in shunt resistance 25.
The variation of the torque driving electric current and rotor 3 of motor 1A changes in linkage.The variation of the electric current flowing through shunt resistance 25 and the voltage putting on shunt resistance 25 and this driving electric current changes in linkage.But, the voltage putting on shunt resistance 25 changes all the time.
Shunt Voltage generating unit 51 generates certain Shunt Voltage VRs according to the peak value of the scheduled period of the voltage putting on shunt resistance 25.As required Shunt Voltage VRs can also be amplified.Shunt Voltage VRs is applied in the input terminal (representing in the figure 7) of comparing section 35 with arrow A.
The waveform switch configuration part 34 of the 2nd embodiment is different from the 1st embodiment, is Shunt Voltage VRs.Specifically, waveform switch configuration part 34 is previously stored with the information of the scheduled voltage corresponding with Shunt Voltage VRs.
The comparing section 35 of the 2nd embodiment is different from the 1st embodiment, is Shunt Voltage VRs.Specifically, as input voltage, Shunt Voltage VRs being input to comparing section 35, Shunt Voltage VRs and reference value are compared by comparing section 35, export its comparative result signal.
Motor 1A is for example suitable for the equipment that cogging is bigger.That is, the terminal current of shunt resistance 25 changes according to the torque of rotor 3.Shunt Voltage generating unit 51 detects the terminal current of shunt resistance 25, generates Shunt Voltage VRs.Shunt Voltage VRs and reference value are compared by comparing section 35, and comparative result is sent to power on signal forming portion 39.Power on signal forming portion 39 selects step mode according to the comparative result come from comparing section 35 transmission, and the power on signal based on the step mode selected is exported inverter circuit 20.By such structure, it is possible to according to the variation of torque at suitable exchange-column shift step mode.
<the 3rd embodiment>
In the 3rd embodiment, it is shown that both speed instruction voltage Vsp and Shunt Voltage VRs are preferably used for inputting an example of signal.It addition, the basic structure of the 3rd embodiment is identical with the 1st embodiment etc..Therefore, in the structure of identical function use same-sign and the description thereof will be omitted.
Figure 8 illustrates a preferred example of block diagram, this diagram show the details of the motor 1B of the 3rd embodiment.As shown in Figure 8, the control circuit 30 of motor 1B includes Shunt Voltage generating unit 51.And then, waveform switch configuration part 34, comparing section 35 include Shunt Voltage respectively and use and speed instruction voltage the two function.
Specifically, the waveform switch configuration part 34 of motor 1B includes the 1st waveform switch configuration part 34a of Shunt Voltage and the 2nd waveform switch configuration part 34b of speed instruction voltage.The structure of the waveform switch configuration part 34 of the 1st waveform switch configuration part 34a and the 2 embodiment is identical.The structure of the waveform switch configuration part 34 of the 2nd waveform switch configuration part 34b and the 1 embodiment is identical.
Additionally, the comparing section 35 of motor 1B includes the 1st comparing section 35a of Shunt Voltage and the 2nd comparing section 35b of speed instruction voltage.The structure of the comparing section 35 of the 1st comparing section 35a and the 2 embodiment is identical.The structure of the comparing section 35 of the 2nd comparing section 35b and the 1 embodiment is identical.
The comparative result signal that 1st comparing section 35a and the 2nd comparing section 35b each obtains is imported in AND circuit 61.In AND circuit 61, select step mode according to this comparative result signal.Such as, when exporting 1 signal from both the 1st comparing section 35a and the 2nd comparing section 35b, AND circuit 61 exports the 1st signal.And, in other cases, AND circuit 61 exports the 2nd signal.
Power on signal forming portion 39 inputs the signal from AND circuit 61, switching the 1st step mode and the 2nd step mode.That is, step mode is switched according to from both the 1st comparing section 35a and the 2nd comparing section 35b comparative result signal inputted.
Motor 1B makes driving current variation according to the variation of the rotary speed of rotor 3, additionally, be suitable to the equipment driving electric current to change according to the variation of the torque of rotor 3.Such as, even if driving electric current to increase along with the rising of the torque of rotor 3, rotary speed is relatively low, it is possible to need not note when noise, if being switched to square wave energising from trapezoidal wave energising, just can reduce switching loss.
It addition, the motor of the present invention is not limited to above-mentioned embodiment, also include various structures in addition.
Such as, the alive waveform of executing in the 2nd step mode is not limited to trapezoidal, it is also possible to be sinusoidal.Position detection unit is not limited to Hall element, it is also possible to be Hall IC or resolver etc..
Motor 1 allows hand over the 2nd step mode into the 1st step mode of square wave energising, trapezoidal wave energising or sinusoidal wave energising in the rotation of rotor 3.That is, motor 1 can be switched to most suitable step mode according to the various input signals from outside order or the state etc. representing motor.Therefore, compared with the situation carrying out square wave energising or trapezoidal wave energising all the time, the reduction of vibration, noise and switching loss can be realized more evenly.
And, the switching of step mode is not according to practical measurement value, but carry out according to the comparative result of predetermined input signal and predetermined reference value set in advance, so need not high-precision calculation process.Therefore, with regard to energy simplified control circuit so that it is inexpensively.
It addition, be prevented from the sharply change of rotating speed, it is suppressed that noise and vibration.Additionally, for motor characteristics, carry out the action that efficiency is high.
It addition, as predetermined input signal, by using the speed instruction voltage from externally input, at suitable exchange-column shift step mode corresponding with the variation of rotary speed.
Further, as predetermined input signal, by using the Shunt Voltage obtained from shunt resistance, it is possible to according to the variation of torque at suitable exchange-column shift step mode.
Furthermore, as predetermined input signal, by operating speed command voltage and Shunt Voltage, just can according to the variation of rotary speed and torque both sides at suitable exchange-column shift step mode.
Claims (4)
1. a motor, this motor includes rotor, stator, inverter circuit, control circuit and position detection unit,
Described rotor pivots about with rotating shaft and includes being constituted the Magnet of multiple magnetic pole,
Described stator is separated with coil that is relative with gap and that include constituting multiple phase with described rotor,
Each phase that described inverter circuit will drive electric current to be supplied to described coil,
Described position detection unit detects the pole change of the rotation along with described rotor,
Described control circuit includes PWM control portion, waveform switch configuration part, comparing section, power on signal forming portion, position of rotation calculating part, phase correction section and timing control part,
Described control circuit, according to predetermined input signal, controls described inverter circuit by pulse width modulation, drives described rotor with predetermined rotary speed,
Described PWM control portion generates the pwm signal of the rotating speed based on required described rotor,
Predetermined reference value set in advance, in order to switch to the 1st step mode and the 2nd step mode, is exported described comparing section by described waveform switch configuration part,
In described 1st step mode, the alive waveform of executing during energising is rectangular-shaped,
In described 2nd step mode, the alive waveform of executing during energising is trapezoidal shape or sinusoidal,
Described input signal and described reference value are compared by described comparing section, export comparative result signal,
Described power on signal forming portion switches described 1st step mode and described 2nd step mode according to the described comparative result signal exported from described comparing section,
Described phase correction section generates the correction for drift information of phase calibration according to described input signal and described comparative result signal, to the correction signal that the output of described timing control part is relevant to described control information,
Described position of rotation calculating part calculates the position of rotation of described rotor according to the signal inputted from described position detection unit, and the rotating position signal calculated is exported described timing control part,
Described timing control part generates the timing information of energising according to described pwm signal and described rotating position signal, corrects described timing information according to described correction signal, to the timing signal that the output of described power on signal forming portion is relevant to described timing information.
2. motor according to claim 1, wherein,
Described input signal is the speed instruction voltage from externally input.
3. motor according to claim 1, wherein,
Described inverter circuit is connected to shunt resistance,
Described control circuit has Shunt Voltage generating unit,
The detection of described Shunt Voltage generating unit puts on the electric current of described shunt resistance, generates predetermined Shunt Voltage,
Described input signal is described Shunt Voltage.
4. motor according to claim 3, wherein,
Described input signal still from the speed instruction voltage of externally input,
Described waveform switch configuration part includes the 1st waveform switch configuration part and the 2nd waveform switch configuration part, 1st waveform switch configuration part prestores the information of the scheduled voltage corresponding with described Shunt Voltage, and export the information reference value as Shunt Voltage of this scheduled voltage, 2nd waveform switch configuration part prestores the information of the scheduled voltage corresponding with described speed instruction voltage, and export the information reference value as speed instruction voltage of this scheduled voltage
Described comparing section includes the 1st comparing section and the 2nd comparing section, and the reference value of described Shunt Voltage and described Shunt Voltage is compared by the 1st comparing section, and the reference value of described speed instruction voltage and described speed instruction voltage is compared by the 2nd comparing section,
Described power on signal forming portion, according to the comparative result signal from described 1st comparing section and described 2nd comparing section both sides output, switches described 1st step mode and described 2nd step mode.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011013186A JP2012157135A (en) | 2011-01-25 | 2011-01-25 | Control device for motor |
| JP2011-013186 | 2011-06-10 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102624298A CN102624298A (en) | 2012-08-01 |
| CN102624298B true CN102624298B (en) | 2016-07-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210018000.5A Expired - Fee Related CN102624298B (en) | 2011-01-25 | 2012-01-19 | Motor |
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| JP (1) | JP2012157135A (en) |
| KR (1) | KR20120086255A (en) |
| CN (1) | CN102624298B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6591368B2 (en) * | 2016-07-27 | 2019-10-16 | 株式会社東芝 | Motor control device |
| JP2018121500A (en) * | 2017-01-27 | 2018-08-02 | アイシン精機株式会社 | Motor controller |
| WO2019044684A1 (en) * | 2017-08-31 | 2019-03-07 | 日本電産トーソク株式会社 | Device for controlling a motor, and storage medium |
| JP7031484B2 (en) * | 2018-05-11 | 2022-03-08 | 株式会社アイシン | Motor control device |
| JP7462613B2 (en) * | 2019-03-26 | 2024-04-05 | 株式会社ミツバ | MOTOR CONTROL DEVICE, MOTOR CONTROL METHOD, AND MOTOR UNIT |
| TWI702790B (en) * | 2019-09-17 | 2020-08-21 | 茂達電子股份有限公司 | System and method for driving motor with frequency conversion mechanism |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6091216A (en) * | 1998-05-28 | 2000-07-18 | Ibiden Co., Ltd. | Motor-driving circuit |
| CN101170294A (en) * | 2006-09-22 | 2008-04-30 | 松下电器产业株式会社 | Electric machine controlling device and controlling device containing the same |
| CN201349192Y (en) * | 2009-01-23 | 2009-11-18 | 中国矿业大学 | Position measuring and speed measuring and controlling device for rotor of synchronous motor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3315847B2 (en) * | 1995-10-27 | 2002-08-19 | 株式会社日立製作所 | Magnetic pole position detecting device and brushless DC motor driving device using the same |
| JP3256840B2 (en) * | 1997-02-04 | 2002-02-18 | 株式会社ゼクセルヴァレオクライメートコントロール | Drive control device for brushless motor |
| JP3578698B2 (en) * | 2000-05-24 | 2004-10-20 | 松下電器産業株式会社 | Brushless DC motor drive |
| JP3688595B2 (en) * | 2001-03-30 | 2005-08-31 | 株式会社東芝 | Disk storage device and spindle motor drive control method |
| JP4053968B2 (en) * | 2003-11-25 | 2008-02-27 | 三菱電機株式会社 | Synchronous motor driving device, refrigerator and air conditioner |
| JP2006006067A (en) * | 2004-06-18 | 2006-01-05 | Nidec Shibaura Corp | Brushless dc motor driving apparatus |
| JP5125091B2 (en) * | 2006-12-19 | 2013-01-23 | パナソニック株式会社 | Motor drive device |
| JP2008154431A (en) * | 2006-12-20 | 2008-07-03 | Toshiba Corp | Motor controller |
-
2011
- 2011-01-25 JP JP2011013186A patent/JP2012157135A/en active Pending
-
2012
- 2012-01-19 CN CN201210018000.5A patent/CN102624298B/en not_active Expired - Fee Related
- 2012-01-19 KR KR1020120006063A patent/KR20120086255A/en not_active Application Discontinuation
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6091216A (en) * | 1998-05-28 | 2000-07-18 | Ibiden Co., Ltd. | Motor-driving circuit |
| CN101170294A (en) * | 2006-09-22 | 2008-04-30 | 松下电器产业株式会社 | Electric machine controlling device and controlling device containing the same |
| CN201349192Y (en) * | 2009-01-23 | 2009-11-18 | 中国矿业大学 | Position measuring and speed measuring and controlling device for rotor of synchronous motor |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20120086255A (en) | 2012-08-02 |
| CN102624298A (en) | 2012-08-01 |
| JP2012157135A (en) | 2012-08-16 |
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