CN105490615A - Variable structure motor and drive circuit thereof - Google Patents
Variable structure motor and drive circuit thereof Download PDFInfo
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- CN105490615A CN105490615A CN201410532702.4A CN201410532702A CN105490615A CN 105490615 A CN105490615 A CN 105490615A CN 201410532702 A CN201410532702 A CN 201410532702A CN 105490615 A CN105490615 A CN 105490615A
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Abstract
The invention provides a drive circuit, which is used for driving a power transistor to be connected or disconnected, and comprises a pulse-width modulation circuit, a self-oscillating circuit, a pulse transformer and a rectifier circuit, wherein the pulse-width modulation circuit is used for generating a pulse-width modulation signal; the self-oscillating circuit is used for receiving the pulse-width modulation signal and generating a corresponding alternating signal according to the pulse-width modulation signal; the pulse transformer is used for receiving the alternating signal and outputting the alternating signal after changing the voltage of the alternating signal; and the rectifier circuit is used for receiving the alternating signal output by the pulse transformer after changing the voltage, converting the alternating signal into a corresponding direct current and then outputting the direct current to the power transistor, thereby driving the power transistor to be connected or disconnected. In addition, the invention provides a variable structure motor with the drive circuit.
Description
Technical field
The present invention is relevant with circuit design; Refer to a kind of structure changes motor and drive circuit thereof especially.
Background technology
Flourish along with electronics technology, electronic switch replaces traditional switch gradually.In general, electronic switch is made up of power crystal, and give this electronic switch to reach conducting or to block the function of this power crystal by the electric energy of one drive circuit supply correspondence.
Refer to Fig. 1; known drive circuit is for avoiding interference; usually a smooth isolated component (as photoelectrical coupler) 51 can be utilized to be connected with this power crystal P; recycle electric energy conversion (DC-DC) that a change-over circuit 52 receives external dc power 53 for should this light isolated component 51, and utilize a controller 54 to control this light isolated component 51 to cause the P conducting of this power crystal or blocking-up to drive this light isolated component 51.
But, change-over circuit 52 (DC-DC) cost intensive used in circuit structure due to above-mentioned drive circuit, and its size adds more greatly the space shared by light isolated component 51, and the electric equipment products making the design of known drive circuit and install this drive circuit cannot reduce costs and reduced volume effectively, and then existing electric product low cost and miniaturized designer trends cannot be met.
Summary of the invention
The object of this invention is to provide a kind of structure changes motor and drive circuit thereof, not only lower cost and preferably isolation effect effectively can be provided and there is the advantage of Miniaturizable design.
For achieving the above object, structure changes motor provided by the invention, comprises a three-phase windings, one first diverter switch group and one drive circuit, and wherein, this first diverter switch group has complex power crystal and this three-phase windings is electrically connected.This drive circuit is in order to conducting or those power crystals blocking this first diverter switch; This drive circuit includes pulse width modulation (PulseWidthModulation, a PWM) circuit, a plurality of self-oscillating circuit, a plurality of pulse transformer and a plurality of rectification circuit; Wherein, this pulse width modulation circuit is in order to produce a plurality of pulse width modulation signal; Those self-oscillating circuits and this pulse width modulation circuit are electrically connected, and in order to distinctly to receive respectively this pulse width modulation signal, and produce a corresponding alternation (alternating) signal according to this pulse width modulation signal; Those pulse transformers are electrically connected with those self-oscillating circuits respectively, in order to distinctly to receive this alternation signal and to export after changing its voltage; Those rectification circuits are electrically connected with those pulse transformers and those power crystals respectively, in order to distinctly to receive the alternation signal that respectively this Pulse Electric depressor exports after changing voltage, and after converting corresponding direct current to, export this power crystal giving correspondence, be turned on or off to drive this corresponding power crystal.
When those power crystal conductings of this first diverter switch group, this three-phase windings is one first connection; When those power crystals of this first diverter switch group disconnect, this three-phase windings is one second connection, and this second connection is not equal to this first connection.
According to above-mentioned design, the present invention also provides a kind of drive circuit and is turned on or off in order to drive at least one power crystal, and includes a pulse width modulation circuit, at least one self-oscillating circuit, at least one pulse transformer and at least one pulse transformer.Wherein, this pulse width modulation circuit is in order to produce a pulse width modulation signal; This self-oscillating circuit and this pulse width modulation circuit are electrically connected, and in order to receive this pulse width modulation signal, and produce a corresponding alternation (alternating) signal according to this pulse width modulation signal; This pulse transformer and this self-oscillating circuit are electrically connected, in order to receive this alternation signal and to export after changing its voltage; This rectification circuit, is electrically connected with this pulse transformer and this power crystal, and in order to receive the alternation signal exported after this Pulse Electric depressor changes voltage, and after converting corresponding direct current to, this power crystal is given in output, is turned on or off to drive this power crystal.
By above-mentioned design, drive circuit just can be made to have lower cost and this structure changes motor can be made effectively to reach the advantage of Miniaturization Design.
Accompanying drawing explanation
Fig. 1 is the circuit block diagram of known drive circuit.
Fig. 2 is the structure chart of the present invention first preferred embodiment structure changes motor.
Fig. 3 is the circuit block diagram of present pre-ferred embodiments drive circuit.
Fig. 4 is that conducting first diverter switch group makes the structure of Fig. 2 be that Y connects.
Fig. 5 is that conducting second diverter switch group makes the structure of Fig. 2 be that △ connects.
Fig. 6 is the structure chart of the present invention second preferred embodiment structure changes motor.
Fig. 7 is that conducting first diverter switch group makes the structure of Fig. 6 be that short Y connects.
Fig. 8 is that blocking-up first diverter switch group makes the structure of Fig. 6 be that long Y connects.
Symbol description in accompanying drawing:
1 structure changes motor, U first-phase coil, V second-phase coil, W third phase coil, S1 first switch, S2 second switch, S3 the 3rd switch, S4 the 4th switch, S5 the 5th switch, S6 the 6th switch, SW power crystal, 2 structure changes motors, U1 first-phase coil, U2 second-phase coil, V1 third phase coil, V2 four-phase line circle, W1 the 5th phase coil, W6 the 6th phase coil, S7 the 7th switch, S8 the 8th switch, S9 the 9th switch, 10 drive circuits, 11 pulse width modulation circuit, 12 self-oscillating circuits, 13 external dc powers, 14 pulse transformers, 15 rectification circuits, P power crystal, 51 smooth isolated components, 52 change-over circuits, 53 external dc powers, 54 controllers.
Embodiment
For can the present invention be illustrated more clearly in, lifts preferred embodiment and coordinate accompanying drawing to be described in detail as follows.
Referring to shown in Fig. 2 and Fig. 3, is the structure changes motor 1 of a preferred embodiment of the present invention, includes a three-phase windings, one first diverter switch group, one second diverter switch group and one drive circuit 10.Wherein:
This three-phase windings includes a first-phase coil U, a second-phase coil V and a third phase coil W, and those phase coils U, V, W have a negative terminal and an anode respectively.
This first switches set includes one first switch S 1, second switch S2 and the 3rd switch S 3, and respectively this switch S 1 ~ S3 has a first end and one second end respectively.In addition, the power crystal SW that each switch S 1 ~ S3 is connected by two differential concatenations forms, and the power crystal SW that this two differential concatenation connects is in order to conducting or blocking-up electric signal, and the electric signal of its conducting or blocking-up is contrary with the flow direction of other one.Certainly, on reality is implemented, be not limited with the constituted mode be connected in series, also by be connected in parallel or other connected modes are to reach conducting or to block the effect of electric signal.
This second switch group includes one the 4th switch S 4, the 5th switch S 5 and one the 6th switch S 6, and respectively this switch S 4 ~ S6 has a first end and one second end equally respectively, and the power crystal SW that each switch S 4 ~ S6 is connected by two differential concatenations equally forms.
The first end of the negative terminal of this first-phase coil U and the first end of the first switch S 1 and the 6th switch S 6 is electrically connected; The anode of this first-phase coil U and the second end of the 4th switch S 4 are electrically connected.The first end of the negative terminal of this second-phase coil V and the first end of second switch S2 and the 4th switch S 4 is electrically connected; The anode of this second-phase coil V and the second end of the 5th switch S 5 are electrically connected.The first end of the negative terminal of this third phase coil W and the first end of the 3rd switch S 3 and the 5th switch S 5 is electrically connected; Second end of anode the 6th switch S 6 of this third phase coil W is electrically connected.
In addition, the second end of this first switch S 1, second switch S2 and the 3rd switch S 3 is electrically connected mutually.
This drive circuit 10 in order to those power crystals SW of this first diverter switch group of conducting and this second diverter switch group one wherein, and blocks those power crystals SW of other one.Consult Fig. 3 again, in the present embodiment, this drive circuit 10 includes pulse width modulation (PulseWidthModulation, a PWM) circuit 11, a plurality of self-oscillating circuit 12, external dc power 13, a plurality of pulse transformer 14 and a plurality of rectification circuit 15.
This pulse width modulation circuit 11 is a microprocessor (MCU) in the present embodiment, in order to produce a plurality of pulse width modulation signal.Certainly, on reality is implemented, also other can produce circuit element or the circuit design of pulse width modulation signal to this pulse width modulation circuit.
Those self-oscillating circuits 12 are electrically connected with this pulse width modulation circuit 11, distinctly in order to receive respectively this pulse width modulation signal, and produce a corresponding alternation (alternating) signal according to this pulse width modulation signal.In the present embodiment, respectively this self-oscillating circuit 12 reaches above-mentioned effect by the internal circuit design of lock chip (GateIC), but not as limit in actual enforcement, except use chip design, the combination of independently electronic component also can be utilized to reach identical effect.
This external dc power 13 is electrically connected those self-oscillating circuits 12, in order to for should direct current energy needed for self-oscillating circuit 12 start.
Those pulse transformers 14 are electrically connected with those self-oscillating circuits 12 respectively, in order to distinctly to receive this alternation signal and to export after changing its voltage.
Those rectification circuits 15 are electrically connected with those pulse transformers 14 and those power crystals SW respectively, in order to distinctly to receive the alternation signal exported after respectively this Pulse Electric depressor 14 changes voltage, and after converting corresponding direct current to, export this power crystal SW giving correspondence, be turned on or off to drive corresponding this power crystal SW.In the present embodiment, the circuit framework of this rectification circuit 15 is full-bridge type rectification framework, but on reality is implemented, also can change on demand semibridge system, centre tap formula or other there is the circuit framework of rectification effect.
Thus, when the power crystal SW conducting of this first switch S 1, second switch S2 and the 3rd switch S 3, and during the power crystal SW of the 4th switch S 4, the 5th switch S 5 and the 6th switch S 6 disconnection, this structure changes motor 1 is in Y access node structure (as Fig. 4).When the power crystal SW of this first switch S 1, second switch S2 and the 3rd switch S 3 disconnects, and during the power crystal SW conducting of the 4th switch S 4, the 5th switch S 5 and the 6th switch S 6, this structure changes motor 1 is in Δ access node structure (as Fig. 5).
In addition, drive circuit 10 of the present invention above-mentionedly has two diverter switch group except being applicable to and can connect except the structure changes motor 1 that exchanges with Δ access node structure in Y, also only there is one group of first diverter switch group and can connect by short Y the structure changes motor 2 exchanged with long Y access node structure is as shown in Figure 6 applicable to, meaning namely, this the first diverter switch group includes one the 7th switch S 7, the 8th switch S 8 and one the 9th switch S 9, and the power crystal SW that respectively this switch S 7 ~ S9 is connected by two differential concatenations equally forms.In more detail, the three-phase windings of this structure changes motor 2 includes a first-phase coil U1, one second-phase coil U2, one third phase coil V1, one four-phase line circle V2, one the 5th phase coil W1 and the 6th phase coil W2, those phase coils U1, U2, V1, V2, W1, W2 has a negative terminal and an anode respectively, and this first-phase coil U1, the negative pole of this third phase coil V1 and the 5th phase coil W1 connects, and the positive pole of this first-phase coil U1 connects the negative pole of this second-phase coil U2, the positive pole of this third phase coil V1 connects the negative pole of this four-phase line circle V2, and the positive pole of the 5th phase coil W1 connects the negative pole of the 6th phase coil W2.The two ends of those switch S 7 ~ S9 are then connected across this second-phase coil U2, the positive pole of this four-phase line circle V2 and the 6th phase coil W2 and negative pole respectively.
Refer to Fig. 7, as those power crystals SW of the 7th switch S 7 of this this first diverter switch group of drive circuit 10 conducting, the 8th switch S 8 and the 9th switch S 9, this structure changes motor presents short Y and connects.And referring again to Fig. 8, when this drive circuit 10 blocks those power crystals SW of the 7th switch S 7 of this first diverter switch group, the 8th switch S 8 and the 9th switch S 9, this structure changes motor presents long Y and connects, and reaches the object of structure changes.
Thus, the present invention is by the global design of this above-mentioned drive circuit 10, with regard to element cost, the cost that this self-oscillating circuit 12, pulse transformer 14, rectification circuit 15 three add up is probably identical with the cost that change-over circuit 52 organized by known list, and make under the cost spent by the present invention compares with known features, then can save the cost payout of known smooth isolated component 51, and then reach the effect reducing cost of manufacture.In addition, along with the progress of integrated circuit and electronic technology, the global design of this drive circuit 10 is easier to reach miniaturization, and makes the size of respectively this element of this drive circuit 10 of the present invention all unlikely too large, and then can reduce the volume of this structure changes motor 1,2.In other words, by design of the present invention, can effectively make structure changes motor 1,2 effectively meet existing electric product low cost and miniaturized trend.
The foregoing is only the better possible embodiments of the present invention, be not limited with the structure changes motor that Y-Δ exchanges and the short Y of long Y-exchanges, certainly implement in aspect at other, also the variable structure motor of other kind of connected mode.In addition, drive circuit of the present invention is except can be applicable to the design of power crystal or relevant electronic switch, also can be applicable to light-emitting diode, low load power supply circuit or other driven in the design of electronic component, and the equivalence that application specification of the present invention and claim are done such as changes, and ought to be included in the scope of the claims of the present invention.
Claims (10)
1. a structure changes motor, includes:
One three-phase windings;
One first diverter switch group, has complex power crystal and this three-phase windings is electrically connected; And
One drive circuit, in order to conducting or those power crystals blocking this first diverter switch; This drive circuit includes a pulse width modulation circuit, a plurality of self-oscillating circuit, a plurality of pulse transformer and a plurality of rectification circuit; Wherein, this pulse width modulation circuit is in order to produce a plurality of pulse width modulation signal; Those self-oscillating circuits and this pulse width modulation circuit are electrically connected, and in order to distinctly to receive respectively this pulse width modulation signal, and produce a corresponding alternation signal according to this pulse width modulation signal; Those pulse transformers are electrically connected with those self-oscillating circuits respectively, in order to distinctly to receive this alternation signal and to export after changing its voltage; Those rectification circuits are electrically connected with those pulse transformers and those power crystals respectively, in order to distinctly to receive the alternation signal that respectively this Pulse Electric depressor exports after changing voltage, and after converting corresponding direct current to, export this power crystal giving correspondence, be turned on or off to drive this corresponding power crystal;
When those power crystal conductings of this first diverter switch group, this three-phase windings is one first connection; When those power crystals of this first diverter switch group disconnect, this three-phase windings is one second connection, and this second connection is not equal to this first connection.
2. structure changes motor according to claim 1, wherein, this first connection is that short Y connects, and this second connection is long Y connects.
3. structure changes motor according to claim 1, wherein, include one second diverter switch group, and this second diverter switch group has complex power crystal and this three-phase windings is electrically connected, and this drive circuit is in order to those power crystals of this first diverter switch of conducting or this second diverter switch wherein one, and disconnect those power crystals of other one simultaneously, and make this three-phase windings be this first connection or this second connection.
4. structure changes motor according to claim 3, wherein, this first connection is that Y connects, and this second connection is △ connects.
5. the structure changes motor according to claim 1 or 3, wherein this three-phase windings includes three isolated phase coils, and this first diverter switch group is electrically connected with the power crystal of two differential concatenations connections and those phase coils respectively, and the power crystal that this two differential concatenation connects is the electric signal in order to conducting or blocking-up and other one opposite course.
6. structure changes motor according to claim 3, wherein, this three-phase windings includes three isolated phase coils, and this second diverter switch group is electrically connected with the power crystal of two differential concatenations connections and those phase coils respectively, and the power crystal that this two differential concatenation connects is the electric signal in order to conducting or blocking-up and other one opposite course.
7. structure changes motor according to claim 1, wherein, this drive circuit includes an external dc power and is electrically connected those self-oscillating circuits, in order to for should direct current energy needed for self-oscillating circuit start.
8. a drive circuit, at least one by driving electronic component in order to drive, and include:
One pulse width modulation circuit, in order to produce a pulse width modulation signal;
At least one self-oscillating circuit, is electrically connected with this pulse width modulation circuit, in order to receive this pulse width modulation signal, and produces a corresponding alternation signal according to this pulse width modulation signal;
At least one pulse transformer, is electrically connected with this self-oscillating circuit, in order to receive this alternation signal and to export after changing its voltage; And
At least one rectification circuit, electronic component is driven to be electrically connected with this pulse transformer and this, change in order to receive this Pulse Electric depressor the alternation signal exported after voltage, and export after converting corresponding direct current to and give this and driven electronic component, driven electronic component start to drive this.
9. drive circuit according to claim 8, wherein, includes at least one external power source, is electrically connected with this self-oscillating circuit, in order to for should direct current energy needed for self-oscillating circuit start.
10. drive circuit according to claim 8, wherein, this is driven electronic component to be power crystal, light-emitting diode or low load power supply circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410532702.4A CN105490615A (en) | 2014-10-11 | 2014-10-11 | Variable structure motor and drive circuit thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410532702.4A CN105490615A (en) | 2014-10-11 | 2014-10-11 | Variable structure motor and drive circuit thereof |
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| CN105490615A true CN105490615A (en) | 2016-04-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410532702.4A Pending CN105490615A (en) | 2014-10-11 | 2014-10-11 | Variable structure motor and drive circuit thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001339990A (en) * | 2000-05-24 | 2001-12-07 | Railway Technical Res Inst | Star-delta control device |
| CN201541220U (en) * | 2009-12-04 | 2010-08-04 | 河南省电力公司许昌供电公司 | Electric motor Y-delta starting equipment |
| US20130003218A1 (en) * | 2008-09-02 | 2013-01-03 | International Business Machines Corporation | Dynamic reconfiguration-switching of windings in a tape storage drive |
| CN103973065A (en) * | 2013-01-18 | 2014-08-06 | 车王电子(宁波)有限公司 | Variable-structure motor and switching method thereof |
-
2014
- 2014-10-11 CN CN201410532702.4A patent/CN105490615A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001339990A (en) * | 2000-05-24 | 2001-12-07 | Railway Technical Res Inst | Star-delta control device |
| US20130003218A1 (en) * | 2008-09-02 | 2013-01-03 | International Business Machines Corporation | Dynamic reconfiguration-switching of windings in a tape storage drive |
| CN201541220U (en) * | 2009-12-04 | 2010-08-04 | 河南省电力公司许昌供电公司 | Electric motor Y-delta starting equipment |
| CN103973065A (en) * | 2013-01-18 | 2014-08-06 | 车王电子(宁波)有限公司 | Variable-structure motor and switching method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 林丘练等: "脉冲变压器MOSFET栅极驱动电路分析与仿真", 《微电子学与计算机》 * |
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Application publication date: 20160413 |