CN1937395A - Coutrol apparatus of synchronous motor and control method therefor - Google Patents
Coutrol apparatus of synchronous motor and control method therefor Download PDFInfo
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- CN1937395A CN1937395A CN 200510107513 CN200510107513A CN1937395A CN 1937395 A CN1937395 A CN 1937395A CN 200510107513 CN200510107513 CN 200510107513 CN 200510107513 A CN200510107513 A CN 200510107513A CN 1937395 A CN1937395 A CN 1937395A
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Abstract
This is a control apparatus and means for the synchronous motor. A lockup mechanism is gained without the electric motion lockup mechanism. This apparatus can be manufactured simply and cost low. It includes a controller for synchronous motor, which consists of a stator (20) with AC wiring coils (21U, 21V, 21W) and a rotatable rotor inside the stator (30). It, as well, possesses a frequency converter (200), which supplies an AC voltage with a certain voltage-frequency character to the stator coils to controls, the motor. Whenever the speed of rotor comes to zero and the lockup signal is under the state of switch-on, an AC voltage supplied by the frequency converter would convert into a DC voltage and applies it to the stator coils. Therefore, related to the stator, the rotary position of the rotor keeps lockup.
Description
Technical field
The present invention relates to have and rotatably install the control device and the control method thereof of synchronous motor of rotor that the stator interior of AC coil is arranged at volume, relate in particular to and when synchronous motor stops, carrying out rotor fixing control device and method thereof.
Background technology
In the past, serving as that load is rotated under the situation of driving with pump and fan etc., for example learnt like that by following patent documentation 1 grade, owing to rotate the loads such as refrigerator that drive cryopump with predetermined rotational speed, so cryopump rotating device that the drive unit that utilization is made up of synchronous motor constitutes, while the 50Hz power supply frequency of utilization converter (so-called frequency converter, the inverter: inverter) it is carried out frequency translation that use commercial usefulness, make supply frequency variable thus, thereby turn round with desirable frequency.
On the other hand, general-purpose type synchronous motor as alternating current motor, the rotor structure of having equipped coil or the synchronous motor of permanent magnet structure are arranged, utilize permanent magnet simultaneously and utilize on the surface of rotor to form a plurality of teeth groove and the synchronous machine that forms the multi-polar structure of the rotor that tooth portion forms also is well known along the rotating shaft direction.In addition, the rotor that this formation tooth portion forms is the rotor structure that also is widely adopted on so-called stepping motor, particularly in recent years, owing to found the rare earth element magnet (neodymium, samarium, cobalt etc.) of high coercive force, and under equal volume, can obtain bigger torque, and can be more in large quantity, make at an easy rate, so just extensively utilized.
The openly real fair 1-14755 communique of (patent documentation 1) Japan Patent
Yet, such as mentioned above, utilizing common frequency converter to control under the situation of the service voltage of induction motor and universal synchronous motor, in general, satisfy V/F that rated load uses than (=) constant control mode is the main flow mode.Therefore, under the situation that synchronous motor is stopped,, in general service voltage V is made as similarly zero (0) because F (frequency of service voltage) is zero.That is: the service voltage to synchronous motor is zero (0) with its frequency, and therefore, rotor is not fixed with regard to freely rotating its position.So, always set so-called lock-out state in order to prevent rotating freely of this rotor, just can the electric locking mechanism that comprise brake etc. be driven in view of the above, so that the rotor of synchronous motor remains on the position of regulation.
But when under the situation that is provided with this electric locking mechanism on the synchronous motor, synchronous motor self will maximize, and just become complicated, price of the structure that comprises locking mechanism becomes expensive.
Summary of the invention
Thereby, the present invention puts forward in view of above-mentioned the problems of the prior art point, its purpose is to provide a kind of need not to use complex mechanisms such as electric locking mechanism, the control device of the synchronous motor that can make and control method thereof thus simple in structure and cheaply.
So, in order to realize described purpose, a technical scheme of the present invention provides a kind of control device of synchronous motor, described synchronous motor comprises that volume has the stator and the rotor that is rotatably installed in described stator interior of AC coil, and has a lock function that the position of rotation that makes described rotor keeps with respect to described stator, described control device has frequency converter, the alternating voltage that this frequency converter will have a voltage-frequency characteristic of regulation offers the AC coil on the electrode of the stator that is twisted in described synchronous motor, and then also has a control device, this control device is controlled described frequency converter, so that the rotating speed at described rotor is zero (0), and the lock function signal is under the situation of on-state, will convert direct voltage to by the alternating voltage that described frequency converter offers the AC coil on the electrode of the stator that is twisted in described synchronous motor and supply with.
In addition, be still in order to realize described purpose, another technical scheme of the present invention provides a kind of control method of synchronous motor, described synchronous motor comprises that volume has the stator and the rotor that is rotatably installed in described stator interior of AC coil, and has a lock function that the position of rotation that makes described rotor keeps with respect to stator, the alternating voltage that described control method will have a voltage-frequency characteristic of regulation by frequency converter offers the AC coil on the electrode of the stator that is twisted in described synchronous motor, rotating speed at described rotor is zero (0) simultaneously, and the lock function signal is under the situation of on-state, described frequency converter is controlled, supplied with so that will convert direct voltage to by the alternating voltage that described frequency converter offers the AC coil on the electrode of the stator that is twisted in described synchronous motor.
And then, in the control device and control method thereof of the synchronous motor of technique scheme of the present invention, preferably described synchronous motor forms a plurality of tooth portions and forms described rotor by permanent magnet in each electrode that constitutes described stator with on the described rotor facing surfaces, simultaneously also with the electrode facing surfaces of described stator on form a plurality of tooth portion with the width identical substantially with the width of the circumferencial direction of described tooth portion, and then described AC coil is wrapped on the electrode of described stator; Perhaps preferably, be that zero (0) and described lock function signal are under the situation of on-state at the rotating speed of described rotor, make that to offer the alternating voltage of the AC coil on the electrode of the stator that is twisted in described synchronous motor from described frequency converter variable; Perhaps, the magnitude of voltage that makes direct voltage is the electric current that flows through the thus value smaller or equal to its rated current in described AC coil, particularly make its peak value that is maintained at the alternating voltage under the stable state about 30% or below it; Perhaps, replace and be maintained at the pattern of regulation.
According to control device and control method thereof by above synchronous motor provided by the present invention, just can bring into play following outstanding effect, that is: can provide complex mechanism such as a kind of electric locking mechanism beyond need not and obtain the latch-up structure of synchronous motor, and by simple structure and the control device of the synchronous motor of cheaply making and control method thereof.
Description of drawings
Fig. 1 is that expression is used to implement as one embodiment of the present invention the three-phase alternating current synchronous motor is carried out the block diagram of control device structure of the control method of drive controlling.
Fig. 2 is the characteristic figure of control mode in the control device of the described synchronous motor of the present invention of expression.
Fig. 3 is illustrated in the control device of described synchronous motor of the present invention, offers the figure of voltage waveform of the U phase of synchronous motor from frequency converter.
Fig. 4 is illustrated in the control device of described synchronous motor of the present invention, offers other the figure of voltage mode one example of synchronous motor from frequency converter.
Fig. 5 is expression by the turn round figure of state transitions of synchronous motor of control of the control device of described synchronous motor of the present invention.
Fig. 6 is the sectional view on the rotating shaft direction that expression is used as the overall structure of the three-phase synchronous motor of an embodiment of the invention.
Fig. 7 is the sectional view of the A-A ' of the last figure that uses of the described three-phase synchronous motor overall structure of expression.
Fig. 8 is the stereogram of the stator structure of the described three-phase synchronous motor of an example expression.
Fig. 9 is the figure of expression as the package mode of the three-phase alternating current coil in the stator of synchronous machine of the present invention.
Embodiment
Below, use accompanying drawing at length to describe with regard to embodiments of the present invention.
At first, represented that in accompanying drawing 6～9 by control device or control method institute overall structure drive controlling, three-phase synchronous motor as an embodiment of the invention, Fig. 6 is the sectional view (cross section on the direction of principal axis) of described three-phase synchronous motor.
In the drawings, mark 10 is metallic cover bodies of the drum that for example is made of metals such as iron, and the stator 20 that for example silicon steel plate is carried out stamping-out and is laminated with definite shape is installed in the portion within it.In addition, the Reference numeral 21 among the figure also will describe in the back, and its expression is wound onto the coil around formed a plurality of magnetic poles on the stator 20.And, in these stator 20 inner formed columnar spaces, via a pair of ball bearing on the central portion that is installed in end bracket 11,12 13,14, profile cylindrical circular rotor 30 substantially rotatably is installed, described end bracket 11,12 is fixed on the two ends of cover body 10.In addition, the be fixed output shaft at the center of inserting this stator 20 of mark among the figure 25 expressions, mark 25 is lead-in wires of this three-phase synchronous motor being supplied with three-phase alternating current.
Then, accompanying drawing 7 express in the described three-phase synchronous motor along the cross section on the position shown in the arrow A-A ' among Fig. 6.Promptly, as also can understanding from this sectional view, stator 20 sides at described three-phase synchronous motor are formed with whole 12 magnetic poles (stator poles) 22,22..., then, around these magnetic poles 22 (that is: be formed on therebetween slit), by the mode of connection shown in the accompanying drawing 9 (a) respectively package three-phase alternating current coil 21U, 21V, 21W are arranged.That is, accompanying drawing 9 (a) expression is wrapped in the circuit diagram of the three-phase alternating current coil on described 12 magnetic poles 22, the 22..., and accompanying drawing 9 (b) expression contains the cross section structure of the stator 20 of coil.In addition, the mark N among the figure represents the neutral point of coil, the lead-in wire of mark 15 expression three-phases, and then mark U, V, W represent the lead-in wire of U phase, V phase, W phase respectively.
In addition, as from as described in Fig. 6 and Fig. 9 (b) also as can be known, on the surface of each magnetic pole 22 of described three-phase synchronous motor (promptly, opposed faces with described rotor 30) rotating shaft direction in upper edge is formed with 3 teeth groove 23,23... respectively, forms 4 tooth portions 24,24... thus respectively on the surface of each magnetic pole.
On the other hand, described rotor 30 is as by its outward appearances of accompanying drawing 8 expression, and profile is cylindric substantially and forms, and also is to form a plurality of teeth groove 31,31... along its rotating shaft direction on its outer peripheral face, forms a plurality of tooth portion 32 thus on its outer surface, 32....In addition, the structure of rotor 30 is so-called hybrid (hybrid) structure that is called as, as sectional view from the graph also can be understood, being illustrated in its inside permanent magnet 33 opposing magnetic pole (the N utmost point, the S utmost point) on the rotating shaft direction of drum is configured, also is silicon steel plate to be carried out stamping-out with the regulation shape and stacked back is fixing forms around it.Yet, rotor 30 shown in Fig. 8 is illustrated in the front and back on every side of a permanent magnet 33 structure that silicon steel plate forms is installed, in addition, the structural table of the rotor shown in described Fig. 6 30 is shown in that to have connected multistage on its rotating shaft direction particularly be rotor 2 grades of described unit structures, so-called multilevel hierarchy.In addition, the progression of this rotor 30 is normally considered suitable decisions such as desired output characteristic in 1～4 scope.
That is,, among Fig. 6 shown in the arrow of dotted line, can form magnetic circuit as described along the axial fore-and-aft direction of rotation by the rotor 30 that adopts this hybrid combination.In addition, in described Fig. 8, these are respectively formed at the place ahead and rear on the outer peripheral face of rotor 30 tooth portion 32,32..., 1/2 tooth pitch (pitch) and forming mutually staggers.That is, the part that becomes tooth portion 32 forwardly in the wings side be formed teeth groove 31.And, in the present embodiment, be formed on the tooth portion 32 on the periphery of rotor 30, the number of 32... (perhaps teeth groove 31,31...), the number that is formed on its place ahead and rear is added up to be about about 36～200.In addition, preferably way is, by means of tooth portion 32 (teeth groove 31) the very little angle of inclination is formed, is made as so-called skew (skew) structure, just can especially reduce slot effect (cogging), and obtain to export stably torque.And then the cross sectional shape of this tooth portion 32 (teeth groove 31) both can be rectangle, circle, also can be elliptical shape.
In addition, shown in Figure 2 as described, in the formed tooth of described stator 20 sides portion 24,24... and the relation between the formed tooth of described rotor 30 sides portion 32,32..., be respectively to form by the identical size (tooth pitch) of cardinal principle, with respect to 1/4 week (90 degree) of its circumference, corresponding 1/2 tooth pitch that staggers assigns to form simultaneously.
Then, the structure of expression control device in accompanying drawing 1, this control device is used for the three-phase alternating current synchronous motor 100 that has been described in detail its structure is in the above carried out drive controlling.In Fig. 1, described synchronous motor 100 has the coil of U phase, V phase, W phase (with reference to figure 9), and they are connected with ac output end of the voltage frequency converter shown in the Reference numeral 200 respectively.In addition, as shown in the figure, this voltage frequency converter 200 is constructed as follows PWM (PUlseWidth Modulation) circuit, 3 groups of this circuit bridge joints are supplied with the three-phase ac power of so-called assigned frequency and assigned voltage as the transistor of the switch element of cancellation and the inverse parallel circuit of diode automatically.
In addition, Reference numeral 300 expressions are the three-phase alternating-current supply of commercial usefulness for example, and its voltage carries out rectification by the rectifier that for example constitutes by the diode bridge joint (converter) 400, and then, after being undertaken smoothly by smmothing capacitor 450, be connected to the input terminal of described voltage frequency converter 200.And, each switch element of described voltage frequency converter 200 (being transistor), respectively according to control signal from following Frequency Converter Control portion 500, its connection/closed condition is controlled, be provided for U phase, V phase, the W phase of described synchronous motor 100 thus via its ac output end.In addition, although this Frequency Converter Control portion 500 does not illustrate herein like that as shown in the figure, but it is made of control circuit 510 and V-F generative circuit 520 etc., wherein, control circuit 510 is in the speed command (SP) of input from the outside, also further import enabling signal, stop signal, locking signal (signal of the rotor-position on the fixed motor), with the control of stipulating from the outside; V-F generative circuit 520 is created on following also with V-F (voltage-frequency) characteristic curve that illustrates.In addition, Frequency Converter Control portion 500 for example can be made of microcomputer.
Expression is by means of the Frequency Converter Control portion 500 that in the above its structure is illustrated in accompanying drawing 2, more than so-called rated frequency in the zone of (fo), supply voltage is kept constant (rated voltage), and the supply voltage in simultaneously that this rated frequency (fo) is the following zone is made as V/F (=) constant control mode.
Here, possess the synchronous motor of described control device, on the basis of described speed command (SP), also, under various states, move and control further by the input of enabling signal, stop signal, locking signal.Various motion states in accompanying drawing 5 in the expression synchronous motor.
Promptly, for example in " be in stop because of release in " state S1, then become " start and connect " if described enabling signal is input to control device, synchronous motor is transferred to " constant speed " state S3 that is rotated with the rotating speed that sets behind " in the acceleration " state S2 of figure.On the other hand, if described stop signal is input to then " in deceleration " state S4 of synchronous motor from this state transitions to figure of control device.Afterwards, when its rotary speed is zero (0) (being " speed is 0 " among the figure), then by having or not the input of described locking signal, promptly " locking is cut off " in figure or " locking is connected " are afterwards, turn back to described " stopping " state S1 once more, perhaps become the S5 state of " in the locking " of fixed rotor position because of release is in.In addition, this moment, rotary speed particularly can be by the three-phase alternating current synchronous motor 100 that has been described in detail structure in the above, frequency signal (F) according to the alternating electromotive force that provides from described Frequency Converter Control portion 500 directly determines, so Frequency Converter Control portion 500 is set to be reduced to setting (0.6min for example at this frequency signal (F)
-1) the moment just become " speed is 0 ".Perhaps, can also be according to V/F than (=) constant relation replaces frequency signal (F) and judges according to magnitude of voltage (V).
On the other hand, at synchronous motor under the situation that the S5 state of described " the locking " is rotated with the rotating speed that sets once more, shown in arrow among the figure, after transferring to described " in the acceleration " state S2, shift to " constant speed " state S3, or after transferring to the state S1 of " being in stopping because of unlatching ", transferring to " constant speed " state S3 through described " in the acceleration " state S2 in case remove described lock-out state, the rotating speed with regulation drives rotation thus.In addition, described synchronous motor can alternatively shift between the S5 state of the state S1 of these " be in stop because of unlatchings in " and " in the locking " as shown by arrows like that.
Here, in accompanying drawing 3, represent that described synchronous motor is in described " in the deceleration " state S4 shown in Figure 5, its rotary speed is the moment of zero (" speed is 0 " among the figure), the state of the electric power that is provided from U phase, V phase, the W phase of 200 pairs of synchronous motors 100 of described frequency converter more particularly is the state of voltage.That is, in the state S4 of " in the deceleration ", as shown in the figure, (to be the V/F shown in described Fig. 2 reduce its voltage (V) than (=) constant relation) with its frequency (F) to the alternating voltage that is provided from described frequency converter 200 with the relation of regulation.Then, being converted into the direct voltage with assigned voltage value in the moment (" to " in the reference diagram) that its frequency (F) or its voltage (V) reach setting for synchronous motor is made as lock-out state supplies with.Promptly, to be altered to direct voltage from the alternating voltage that described frequency converter 200 offers U phase on the electrode of the stator that is twisted in synchronous motor 100, V phase, W cross streams coil, each direct voltage in mutually is taken as that to be about to according to the rotation at this rotor be the zero determined ratio of (0) ac voltage before with these simultaneously.In addition, if according to above-mentioned ratio then the direct voltage that offers these each phases also can suitably change its magnitude of voltage within the limits prescribed.
Like this, for synchronous motor is made as lock-out state, and convert under the situation that direct voltage with assigned voltage value supplies with, by the voltage frequency converter 200 that constitutes described pwm circuit is controlled, just can be extremely simple structure and easily realize the lock-out state of synchronous motor.Promptly, as from the structure of the three-phase alternating current synchronous motor 100 shown in described Fig. 6～Fig. 9 also as can be known, stator 20 1 sides at described three-phase synchronous motor, be formed at its whole 12 magnetic poles (stator poles) 22,22... the tooth portion 24 in interior week, 24... in the magnetic field that produced be fixed (promptly not rotating), so relative with them have a plurality of teeth groove 31 on its periphery, 31... rotor 30, the magnetic field suction that is produced by stator 20 1 sides and fixed (locking) so just needn't be provided with the electric locking mechanism that comprises brake etc. as prior art.
In addition, in as described control device of the present invention or method, by utilizing frequency (F) or the voltage (V) that is generated by Frequency Converter Control portion 500 for the frequency converter 200 of controlling the formation control device, it is extremely easy that the detection of rotary speed also becomes.That is, just need not to be provided with as prior art the electric locking mechanism that comprises brake etc. in view of the above, can prevent that the maximization of synchronous motor self and high price from formatting.
In addition, in the Frequency Converter Control portion 500 that constitutes by microcomputer described in described Fig. 1 etc., can make the assigned voltage value of this direct voltage variable by setting suitable parameter.In addition, preferred way is its value for example to be set for can produce scaling loss etc. as if considering when described AC coil is supplied, and applies voltage can not flow through the electric current degree more than the rated current yet in coil magnitude of voltage under the state that stops even then being at motor.Specifically, preferred way is, with magnitude of voltage be set at the rated voltage shown in described Fig. 2 (peak value of the voltage of frequency more than rated frequency (fo)) about about 30% or below it.
In addition, can also be the moment of zero (0) in the rotary speed of synchronous motor, will be from described frequency converter 200 to the U of synchronous motor 100 phase, V phase, the W voltage that provides mutually, remaining untouched constantly at this keeps, and needn't use described mode.Or as shown in Figure 4, can also be for example be the moment " to " of zero (0) in the rotary speed of synchronous motor, the direct voltage of the prescribed model that sets is in advance offered U phase, V phase, W phase, and needn't use described mode.In addition, the example shown in Fig. 4 is, for example about 30% voltage with described rated voltage is made as " V ", and V is supplied with mutually mutually the voltage of " V/2 " with W.
Claims (12)
1, a kind of control device of synchronous motor, described synchronous motor comprises that volume has the stator and the rotor that is rotatably installed in described stator interior of AC coil, and have the lock function that the position of rotation that makes described rotor keeps with respect to described stator, described control device is characterised in that:
Have frequency converter, the alternating voltage that this frequency converter will have a voltage-frequency characteristic of regulation offers the AC coil on the electrode of the stator that is twisted in described synchronous motor,
And then also has a control device, this control device is controlled described frequency converter, so that the rotating speed of described rotor be zero and the lock function signal be under the situation of on-state, will convert direct voltage to by the alternating voltage that described frequency converter offers the AC coil on the electrode of the stator that is twisted in described synchronous motor and supply with.
2, the control device of synchronous motor according to claim 1 is characterized in that:
Described synchronous motor forms a plurality of tooth portions and forms described rotor by permanent magnet in each electrode that constitutes described stator with on the described rotor facing surfaces, simultaneously also with the electrode facing surfaces of described stator on form a plurality of tooth portion with the width identical substantially with the width of the circumferencial direction of described tooth portion, and then described AC coil is wrapped on the electrode of described stator.
3, the control device of synchronous motor according to claim 1 is characterized in that:
The rotating speed of described rotor be zero and described lock function signal be under the situation of on-state, the direct voltage that offers the AC coil on the electrode of the stator that is twisted in described synchronous motor from described frequency converter is variable.
4, the control device of synchronous motor according to claim 1 is characterized in that:
The rotating speed of described rotor be zero and described lock function signal be under the situation of on-state, make the magnitude of voltage that offers the direct voltage of the AC coil on the electrode of the stator that is twisted in described synchronous motor from described frequency converter be the electric current that described AC coil, flows through thus value smaller or equal to its rated current.
5, the control device of synchronous motor according to claim 4 is characterized in that:
Make the magnitude of voltage that offers the direct voltage of the AC coil on the electrode of the stator that is twisted in described synchronous motor from described frequency converter be the alternating voltage under the stable state of described synchronous motor peak value about 30% or below it.
6, the control device of synchronous motor according to claim 1 is characterized in that:
The rotating speed of described rotor be zero and described lock function signal be under the situation of on-state, to offer the alternating voltage of the AC coil on the electrode of the stator that is twisted in described synchronous motor from described frequency converter, the rotating speed that is maintained at this rotor just be determine on each phase place of the described alternating voltage before zero, the pattern of modifiable direct voltage on the ratio of the magnitude of voltage of each phase place.
7, a kind of control method of synchronous motor, described synchronous motor comprises that volume has the stator and the rotor that is rotatably installed in described stator interior of AC coil, and have the lock function that the position of rotation that makes described rotor keeps with respect to stator, described control method is characterised in that:
The alternating voltage that will have a voltage-frequency characteristic of regulation by frequency converter offers the AC coil on the electrode of the stator that is twisted in described synchronous motor, simultaneously the rotating speed of described rotor be zero and the lock function signal be under the situation of on-state, described frequency converter is controlled, supplied with so that will convert direct voltage to by the alternating voltage that described frequency converter offers the AC coil on the electrode of the stator that is twisted in described synchronous motor.
8, the control method of synchronous motor according to claim 7 is characterized in that:
Described synchronous motor forms a plurality of tooth portions and forms described rotor by permanent magnet in each electrode that constitutes described stator with on the described rotor facing surfaces, simultaneously also with the electrode facing surfaces of described stator on form a plurality of tooth portion with the width identical substantially with the width of the circumferencial direction of described tooth portion, and then described AC coil is wrapped on the electrode of described stator.
9, the control method of synchronous motor according to claim 7 is characterized in that:
The rotating speed of described rotor be zero and described lock function signal be under the situation of on-state, the direct voltage that offers the AC coil on the electrode of the stator that is twisted in described synchronous motor from described frequency converter is variable.
10, the control method of synchronous motor according to claim 7 is characterized in that:
The rotating speed of described rotor be zero and described lock function signal be under the situation of on-state, make the magnitude of voltage that offers the direct voltage of the AC coil on the electrode of the stator that is twisted in described synchronous motor from described frequency converter be the electric current that described AC coil, flows through thus value smaller or equal to its rated current.
11, according to the control method of the described synchronous motor of claim 10, it is characterized in that:
Make the magnitude of voltage that offers the alternating voltage of the AC coil on the electrode of the stator that is twisted in described synchronous motor from described frequency converter be the alternating voltage under the stable state peak value about 30% or below it.
12, the control method of synchronous motor according to claim 7 is characterized in that:
The rotating speed of described rotor be zero and described lock function signal be under the situation of on-state, to offer the alternating voltage of the AC coil on the electrode of the stator that is twisted in described synchronous motor from described frequency converter, the rotating speed that is maintained at this rotor just be determine on each phase place of the described alternating voltage before zero, the pattern of modifiable direct voltage on the ratio of the magnitude of voltage of each phase place.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101075133A CN100424985C (en) | 2005-09-23 | 2005-09-23 | Coutrol apparatus of synchronous motor and control method therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101075133A CN100424985C (en) | 2005-09-23 | 2005-09-23 | Coutrol apparatus of synchronous motor and control method therefor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1937395A true CN1937395A (en) | 2007-03-28 |
| CN100424985C CN100424985C (en) | 2008-10-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005101075133A Expired - Fee Related CN100424985C (en) | 2005-09-23 | 2005-09-23 | Coutrol apparatus of synchronous motor and control method therefor |
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| CN (1) | CN100424985C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103457524A (en) * | 2012-05-31 | 2013-12-18 | 三菱电机株式会社 | Permanent magnet synchronous motor control device |
| CN111121354A (en) * | 2018-10-30 | 2020-05-08 | 石家庄长通电器有限公司 | Control method for preventing step loss of electronic expansion valve |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3971520B2 (en) * | 1998-10-14 | 2007-09-05 | 東芝キヤリア株式会社 | Brushless motor drive device for outdoor fan of air conditioner |
| JP3591438B2 (en) * | 2000-09-18 | 2004-11-17 | 株式会社豊田自動織機 | Control method of single spindle drive motor of spinning machine |
| JP2002247880A (en) * | 2001-02-19 | 2002-08-30 | Japan Servo Co Ltd | Dc brushless motor controlling device |
| JP2004105585A (en) * | 2002-09-20 | 2004-04-08 | Matsushita Electric Ind Co Ltd | Washer |
-
2005
- 2005-09-23 CN CNB2005101075133A patent/CN100424985C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103457524A (en) * | 2012-05-31 | 2013-12-18 | 三菱电机株式会社 | Permanent magnet synchronous motor control device |
| CN103457524B (en) * | 2012-05-31 | 2016-03-30 | 三菱电机株式会社 | Permanent-magnet synchronous electric motor control device |
| CN111121354A (en) * | 2018-10-30 | 2020-05-08 | 石家庄长通电器有限公司 | Control method for preventing step loss of electronic expansion valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100424985C (en) | 2008-10-08 |
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