TW201442396A - Reluctance type motor, reluctance motor driving circuit, and reluctance motor - Google Patents

Abstract

A driving circuit of reluctance motor is provided, the stator of the reluctance motor has M (M ≥ 3) phase windings, each phase winding has a first coil and a second coil arranged at diametrically opposite positions and connected serially with a contact point, the driving circuit having M bridge arms connected in parallel with a DC power supply and electrically coupled with the M phase windings, and 2xM damping capacitors. Each phase winding is serially connected between the upper switch and lower switch of the corresponding bridge arm, and a separate flywheel diode is arranged in inverse parallel connection between both ends of each phase winding and the positive and negative terminals of the DC power supply, a separate damping capacitors is connected correspondingly between the contact point of each phase winding and the positive and negative terminals of the DC power supply, such that the counter-electromotive force instantly generated by each phase winding can charge, respectively through the corresponding flywheel diode, the damping capacitor electrically coupled between the contact point of each phase winding and the positive and negative terminals of the DC power supply.

Description

Reluctance engine, reluctance motor drive circuit and reluctance motor

The present invention relates to a brushless DC motor, and more particularly to a magnetoresistive engine.

1 and 2 are schematic front and side cross-sectional views of a reluctance motor 1 including a stator 11 and a rotor 12 disposed in the stator 11. The stator 11 has eight salient poles A, A', B, B', C, C', D, D', and four-phase windings wound around the eight salient poles, each phase winding having a series of a coil L ₁ and a second coil L ₂ are respectively wound around two diametrically opposed salient poles of the stator 11, for example, the first coil L _{1 of the} A-phase winding is wound around the salient pole A and the second coil L ₂ is wound around the salient poles a ', B-phase winding of the first coil L ₁ is wound around the salient poles B and L ₂ of the second coil is wound around the salient poles B', and so on. The rotor 12 has six salient poles a, a', b, b', c, c'.

Referring to FIG. 3 again, there is a conventional reluctance motor drive circuit 2 electrically coupled to a DC power supply Vdc and having four bridge arms 21-24 connected in parallel with a DC power supply Vdc. Corresponding to the four-phase winding connecting the stator 11, and having an upper switch Qu electrically coupled to one end of the corresponding phase winding, a lower switch Qn electrically coupled to the other end of the corresponding phase winding, and a reverse a first diode D ₁ electrically coupled between one end of the phase winding and a negative terminal of the DC power source Vdc, and a reverse electrical coupling at the other end of the phase winding and a positive terminal of the DC power source Vdc the second diode D between the _two.

And the driving circuit 2 sequentially excites the four-phase windings of the A, B, C, and D in the phase-exciting mode of the reluctance motor 1, that is, one of the bridge arms is controlled in a basic period, for example, A shown in FIG. The upper switch Qu and the lower switch Qn of the phase bridge arm are turned on, so that the first coil L1 and the second coil L2 of the A-phase winding are connected to the DC power source Vdc, so that the salient poles A, A' around which the magnetic poles are attracted generate a magnetic attraction rotor. The salient poles a, a' of 12 move toward the salient pole A'A' of the stator 11, as shown in Fig. 1, and then the upper switch Qu and the lower switch Qn of the A-phase arm are not turned on, and then the B-phase bridge is The upper switch Qu and the lower switch Qn of the arm are turned on, and the first coil L1 and the second coil L2 of the B-phase winding are connected to the DC power source Vdc, so that the salient poles B and B' disposed around the arm generate magnetic force to attract the rotor 12. The salient poles b, b' move toward the salient poles B, B' of the stator 11, and then sequentially magnetize the C and D phase windings in the same manner to drive the rotor 12 clockwise, and vice versa. The C, B, and A phase windings are energized to drive the rotor 12 counterclockwise.

However, as shown in FIG. 5, when the drive circuit 2 ends at the above-mentioned basic period and controls, for example, the upper switch Qu and the lower switch Qn- of the A-phase arm are not turned on, the first coil L1 and the second coil L2 of the A-phase winding. A counter electromotive force e1 and e2 are generated instantaneously, and the large currents formed by the counter electromotive forces e1 and e2 follow the reverse parallel connection between the two ends of the A phase winding and the positive and negative ends of the DC power source. The diodes D ₁ and D ₂ discharge the DC power supply Vdc, and the high-voltage impact on the DC power supply Vdc, such as a battery or a capacitor, easily causes the DC power supply Vdc to be overheated due to excessive input current.

In addition, the salient pole structure of the stator 11 and the rotor 12 of the conventional reluctance motor 1 generates a significant tumbling torque during the commutation process, causing vibration and noise when the motor is in operation.

Accordingly, it is an object of the present invention to provide a drive circuit for a reluctance engine and a reluctance motor that can recover and reuse the counter electromotive force generated in a coil winding during driving.

Further, another object of the present invention is to provide a reluctance engine and a reluctance motor which can reduce the vibration torque generated during the commutation process and reduce the vibration and noise during motor operation.

Thus, a reluctance engine of the present invention receives a DC power input and includes a reluctance motor and a drive circuit. The reluctance motor has a stator and a rotor, and the stator has M (M≧3) phase windings, each phase winding has a first coil and a second coil disposed at a radial relative position and connected in series with a joint. The driving circuit comprises M bridge arms connected in parallel with the DC power source and electrically coupled to the M phase windings, and 2xM damping capacitors, each of the bridge arms having an electrical coupling with one end of the corresponding phase winding An upper switch, a lower switch electrically coupled to the other end of the corresponding phase winding, and a reverse fly electrically coupled to the first flywheel diode between one end of the phase winding and the negative end of the DC power source And a second flywheel diode electrically coupled between the other end of the phase winding and the positive end of the DC power source; the damping Capacitors are respectively connected between the contact of each phase winding and the positive end of the DC power source, and between the contact and the negative terminal of the DC power source, thereby, when one of the bridge arms is turned on and off When the switch is turned on, the phase winding electrically coupled between the upper switch and the lower switch is connected to the DC power source to generate magnetic energy to drive the rotor to rotate, and when the upper switch and the lower switch of the bridge arm are not conductive The first coil of the phase winding instantaneously generates a counter electromotive force, and the damping capacitor is electrically coupled between the contact of the phase winding and the negative terminal of the DC power supply via the second flywheel diode. At the same time, the second coil of the phase winding instantaneously generates a counter electromotive force to charge the damping capacitor electrically coupled between the junction of the phase winding and the positive terminal of the DC power source via the first flywheel diode.

Preferably, the DC power source is a battery, and when the damping capacitance connected between the contact of each phase winding and the positive terminal of the DC power source is connected to the contact and the negative terminal of the DC power source The damped capacitors charge the battery when the voltage across the series is greater than the voltage of the battery.

Preferably, the reluctance engine further includes a rectifying and filtering circuit electrically coupled between the driving circuit and an AC power source, and rectifying and filtering the AC power to generate the DC power to the driving circuit.

Preferably, the snubber capacitor is a non-polar IF capacitor with an operating frequency range of 300 to 1000 Hz.

Preferably, the stator has 2xM salient poles, and the first coil and the second coil of each phase winding of the stator are respectively wound on two diametrically opposite salient poles, and the rotor has 2xN (2<N <M) salient poles.

Preferably, the driving circuit further comprises N resonant inductors respectively disposed on the two salient poles opposite to each other in the radial direction of the rotor, N resonant capacitors respectively connected in parallel with the corresponding resonant inductors, and M respective a third flywheel diode that is antiparallel in parallel with the corresponding upper switch of the bridge arm, and a fourth flywheel diode that is in anti-parallel with the lower switch of the corresponding bridge arm, and when In the driving circuit, the upper switch and the lower switch of one of the bridge arms are turned on, so that when the phase winding electrically coupled between the phase winding and the direct current power source is connected, the two radial opposite salient poles of the rotor close to the phase winding are arranged The resonant inductor induces a current and charges the resonant capacitor. When the upper switch and the lower switch of the bridge arm are not turned on, so that the phase winding is not connected to the DC power source, the resonant capacitor discharges toward the resonant inductor. Causing a first coil of the phase winding to induce a current and connecting the damping capacitor between the junction of the phase winding and the positive terminal of the DC power source via the third flywheel diode pair in anti-parallel with the upper switch Charging while making the phase winding The second coil of the group induces a current and charges the damping capacitor between the junction of the phase winding and the negative terminal of the DC power source via the fourth flywheel diode in anti-parallel with the lower switch.

Preferably, each of the salient pole ends of the stator is enlarged and concave to form a concave arc shape, and each of the salient pole ends of the rotor is enlarged and convex to form a phase opposite to each of the salient pole ends of the stator. Fitted convex curved shape.

Further, the present invention relates to a drive circuit for a reluctance motor having a stator and a rotor having M (M≧3) phase windings, each phase winding having a radial relative position and being connected in series a first coil and a second coil of the point, and the driving circuit receives the DC power input and The utility model comprises M bridge arms connected in parallel with the DC power source and electrically coupled to the M phase windings, and 2×M damping capacitors; each bridge arm has an upper switch electrically coupled to one end of the corresponding phase winding. a lower switch electrically coupled to the opposite end of the corresponding phase winding, a first flywheel diode electrically coupled between one end of the phase winding and the negative end of the DC power supply, and a first flywheel diode a second flywheel diode electrically coupled between the other end of the phase winding and the positive end of the DC power source; the damping capacitors are respectively connected to the contact of each phase winding and the DC power source Between the positive ends, and between the contacts and the negative terminal of the DC power source, and when the upper switch and the lower switch of one of the bridge arms are turned on, the phase winding electrically coupled between the upper switch and the lower switch Leading to the DC power source to generate magnetic energy to drive the rotor to rotate, and when the upper switch and the lower switch of the bridge arm are not conducting, the first coil of the phase winding instantaneously generates a counter electromotive force via the second flywheel diode a body pair electrically coupled to the junction of the phase winding and the direct current The damping capacitor is charged between the negative terminals, and the second coil of the phase winding instantaneously generates a back electromotive force that is electrically coupled to the contact of the phase winding and the DC power source via the first flywheel diode pair The damper capacitor is charged between the positive ends.

Further, a reluctance motor of the present invention includes a stator and a rotor provided on an inner ring of the stator. The stator has 2xM (M≧3) salient poles and M-phase windings, and the ends of the salient poles are enlarged and concave to form a concave arc shape, and each phase winding has a diameter respectively wound around the stator. a first coil and a second coil connected to the opposite two salient poles; the rotor has 2xN (2<N<M) salient poles, and the ends of the salient poles are enlarged and convex to form a Each of the salient pole ends of the stator cooperates in a convex arc shape.

Preferably, the reluctance motor further comprises N resonant inductors respectively disposed on two symmetrical poles of the rotor, and N resonant capacitors respectively connected in parallel with the corresponding resonant inductors.

According to the invention, a damping capacitor is electrically coupled between the contacts of the phase windings corresponding to the electrical couplings of the respective bridge arms and the positive and negative ends of the DC power source, so that the phase windings are electrically coupled by the bridge arms. The instantaneous back electromotive force generated when the conduction is switched to the non-conduction is timely charged to the corresponding two damper capacitors electrically coupled via the flywheel diode electrically coupled at both ends thereof, without causing high voltage impact on the DC power source, and storing The power in the damper capacitors can also supplement the DC power supply in a timely manner, and extend the power supply time of the DC power supply, and can also provide parallel resonant inductors and resonant capacitors on the radiant salient poles of the rotor. The rotor induces current from each phase winding of the stator to generate electricity during the rotation process, and stores the power into the damper capacitors through the phase windings, thereby further extending the power supply time of the DC power source, and each of the salient poles of the stator The end is enlarged to form a concave arc shape, and the ends of the salient poles of the rotor are enlarged to form a convex arc shape matching the ends of the salient poles of the stator, which can effectively reduce the magnetic shape. Dayton motor commutation produced during the rotation torque, and to suppress vibration and noise generated during operation of the motor.

4‧‧‧Reluctance motor

5‧‧‧Drive circuit

41‧‧‧ Stator

42‧‧‧Rotor

50‧‧‧Rectifier filter circuit

51~54‧‧‧Bridge arm

S1~S4‧‧‧ salient pole

S1’~S4’‧‧‧Surgent

R1~R3‧‧‧ salient pole

R1’~R3’‧‧‧

A first coil L ₁ ‧‧‧

L ₂ ‧‧‧second coil

Y‧‧‧Contact

Vdc‧‧‧DC power supply

C _d1 , C _d2 ‧‧‧ damping capacitor

Qu‧‧‧Up switch

Qn‧‧‧ switch

D ₁ ‧‧‧First flywheel diode

D ₂ ‧‧‧Second flywheel diode

Du‧‧‧ third flywheel diode

Dn‧‧‧Fourth flywheel diode

N1‧‧‧ one end

N2‧‧‧Other end

E1, e2‧‧‧ counter electromotive force

i ₁ , i ₂ ‧ ‧ current

Lr‧‧‧Resonance Inductance

Cr‧‧‧Resonance Capacitor

E3, e4‧‧‧ induced voltage

i ₃ ‧‧‧Resonance current

i ₄ ‧‧‧discharge current

Other features and effects of the present invention will be apparent from the following description of the drawings. FIG. 1 is a front cross-sectional view of a reluctance motor illustrating the front structure of a conventional reluctance motor; A partial side cross-sectional view of a reluctance motor illustrating a conventional magnetic FIG. 3 is a circuit diagram illustrating the relationship between the drive circuit of the conventional reluctance motor and the four-phase winding of the stator; FIG. 4 is a circuit diagram illustrating the drive circuit of the conventional reluctance motor One of the bridge arms connects the phase winding electrically coupled thereto with the DC power source; FIG. 5 is a circuit diagram illustrating the bridge arm of FIG. 4 when the phase winding electrically coupled thereto is not connected to the DC power source, The current formed by the counter electromotive force generated on the single-phase winding flows through the DC power supply; FIG. 6 is a front cross-sectional view showing a preferred embodiment of the reluctance motor of the present invention, illustrating the front structure of the reluctance motor of the embodiment; 7 is a partial side cross-sectional view showing the reluctance motor of the present embodiment, illustrating a side structure of the reluctance motor of the embodiment; FIG. 8 is a circuit diagram showing a preferred embodiment of the driving circuit of the reluctance motor of the present invention. Corresponding to the electrical coupling relationship with the four-phase winding of the stator of the reluctance motor; FIG. 9 is a circuit diagram illustrating the phase winding and the DC power supply of one of the bridge arms of the driving circuit of the reluctance motor of the embodiment FIG. 10 is a circuit diagram illustrating that the bridge arm of FIG. 9 causes the phase windings electrically coupled thereto not to be electrically connected to the DC power source, and the currents formed by the counter electromotive force generated on the phase windings respectively flow into corresponding states. FIG. 11 is a circuit diagram illustrating that the embodiment further includes a rectifying and filtering circuit electrically coupled between an AC power source and the driving circuit, which is used for The flow source is rectified and filtered to generate a DC power supply. FIG. 12 is a partial side cross-sectional view of the reluctance motor of the embodiment, illustrating that the two radial radii of the rotor of the reluctance motor of the embodiment are further provided with a resonance. The inductor and a resonant capacitor connected in parallel with the resonant inductor; FIG. 13 is a circuit diagram illustrating the phase winding electrically coupled to a bridge arm of the driving circuit of the reluctance motor of the embodiment and the two radial directions of the rotor Corresponding relationship of the resonant inductors on the salient poles; FIG. 14 is a circuit diagram illustrating the two radial directions of the rotor of the driving circuit of FIG. 13 in which the phase arm is electrically connected to the DC power source The resonant inductor on the salient pole generates a resonant current to charge the resonant capacitor; and FIG. 15 is a circuit diagram illustrating that the bridge arm of FIG. 14 causes the phase winding electrically coupled thereto to be not connected to the DC power source, and the resonant capacitor will The resonant inductor discharges, and the first coil and the second coil of the phase winding respectively generate an induced voltage, and the respectively formed currents respectively flow into the corresponding damping capacitors.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same reference numerals.

6 and FIG. 7 are schematic cross-sectional views showing the front and side structures of a reluctance motor 4 according to a preferred embodiment of the reluctance engine of the present invention. The reluctance motor 4 mainly includes a stator 41 and a stator 42. The rotor 42 of the inner ring. The stator 41 has 2xM (M≧3) averaged salient poles, and an M-phase winding wound around the salient poles. In this embodiment, M=4, that is, 8 salient poles S1, S1', S2. S2', S3, S3', S4, S4' are taken as an example, and the 8 salient poles are respectively wound with A~D common 4-phase windings, and each phase winding has a series connection at a contact Y, and is respectively arranged on two radially opposite the stator salient poles 41 a first coil L ₁ and a second coil L _2, for example, a-phase windings of the first coil L ₁ is wound around the salient pole S1 and the second coil winding L ₂ disposed salient poles S1 ', B-phase winding of the first coil L ₁ is wound around the salient poles S2 and the second coil L ₂ is wound around the salient pole S2', and so on. The rotor 42 has 2xN (2<N<M) averaged salient poles. In the present embodiment, N=3, that is, six salient poles R1, R1', R2, R2', R3, R3' are taken as an example. .

Referring again to FIG. 8, it is a schematic diagram showing the connection relationship between the drive circuit 5 of the reluctance engine of the present embodiment and the A to D four-phase winding of the reluctance motor 4. Driving circuit 5 and the DC power source Vdc, for example, a battery is electrically coupled to and including M (M = 4) a DC power supply Vdc parallel arm 51 to 54, and 2xM, i.e. 8 damped capacitor C _d1, C _d2 Each of the bridge arms, such as the bridge arm 51, has one end coupled to the corresponding phase winding, for example, an upper switch Qu electrically coupled to one end n1 of the A-phase winding, and one end electrically coupled to the other end of the corresponding phase winding n2 a first switch Qn, a reverse fly electrically coupled to the first flywheel diode D ₁ between the one end n1 of the phase winding and the negative terminal of the DC power source Vdc, and a reverse electrical coupling coupled to the phase winding a second flywheel diode D ₂ between the other end n2 and the positive end of the DC power source Vdc, and the other end of each of the upper switches Qu is electrically coupled to the positive end of the DC power source Vdc, and the other end of each of the lower switches Qn It is electrically coupled to the negative terminal of the DC power source Vdc.

Referring also to FIG. 8, the damper capacitors Cd1 are respectively connected between the junction Y of each phase winding and the positive terminal of the DC power source Vdc. And the damping capacitors Cd2 are respectively connected between the junction Y of each phase winding and the negative terminal of the DC power source Vdc.

In the present embodiment, the driving circuit 5 is a switching (switching) type controller, which is an example of sequentially exciting the four-phase windings of A, B, C, and D by exciting the reluctance motor 4. For example, the initial state of the reluctance motor 4 is as shown in FIG. 6, that is, the salient poles R1, R1' of the rotor 42 are closest to the salient poles S1, S1' of the stator 41, and the drive circuit 5 only controls one of the bridges in a basic period. The arm, for example, the upper switch Qu and the lower switch Qn of the bridge arm 51 electrically coupled to the A-phase winding are turned on, as shown in FIG. 9, the first coil L ₁ and the second coil L _{2 of} the A-phase winding are connected to the DC power source Vdc. Leading, and causing the salient poles S1, S1' of the stator 41 to be wound to generate a magnetic attraction force, the salient poles R1, R1' of the rotor 42 are respectively moved toward the salient poles S1, S1' of the stator 41, so that the rotor 42 The salient poles R2, R2' pass through the salient poles S2, S2' of the stator 41, and then the upper switch Qu and the lower switch Qn of the bridge arm 51 are not turned on, and then the upper switch of the bridge arm 52 electrically coupled with the B-phase winding is connected Qu Qn and the switch is turned on, the B-phase winding of the first coil L ₁ and L ₂ and the second coil conductively connected to the DC power source Vdc, so that they are wound salient poles S2, S2 'generates magnetic attractive force to attract the rotor 42 The salient poles R2 and R2' are moved toward the salient poles S2 and S2' of the stator 41, and then the C and D phase windings are sequentially excited in the same manner, that is, the rotor 42 can be driven to rotate clockwise; By exciting the windings of the D, C, B, and A phases, the rotor 42 can be driven to rotate counterclockwise. Meanwhile, in the basic period of each conducting bridge arm, a first coil L ₁ and a second phase winding of the coil and electrically coupled to the bridge arm L ₂ will store electrical energy.

Therefore, as shown in FIG. 10, when the drive circuit 5 ends at the above-described basic period and controls, for example, the upper switch Qu and the lower switch Qn- of the bridge arm 51 electrically coupled to the A-phase winding are not turned on, the A-phase winding is The electric energy stored on one coil L ₁ and the second coil L ₂ instantaneously generates a counter electromotive force e1 and e2, wherein the current i ₁ formed by the counter electromotive force e1 generated by the first coil L1 flows through the phase A winding. a damping capacitor C _d2 between the contact point Y and the negative terminal of the DC power source Vdc, and charging the damping capacitor C _d2 , and then connected to the negative end of the DC power source Vdc (ie, the damping) The second flywheel diode D ₂ between the other end of the capacitor Cd returns to the first coil L ₁ ; at the same time, the current i ₂ formed by the counter electromotive force e2 generated by the second coil L ₂ is connected via the A The first flywheel diode D ₁ between the other end n2 of the phase winding and the positive terminal of the DC power source Vdc flows to a damping capacitor C connected between the junction Y of the A-phase winding and the positive terminal of the DC power source Vdc _D1 , and the damper capacitor C _{d1 is} charged, and then returned to the second coil L ₂ .

Thereby, when the upper switch Qu and the lower switch Qn of each of the bridge arms 51-55 are switched from conduction to non-conduction, the high-voltage counter electromotive force generated by each phase winding electrically coupled to each of the bridge arms 51-55 is thereby generated. The instantaneous large current formed will not flow through the DC power supply Vdc, and avoid direct impact on the DC power supply Vdc. At the same time, the back electromotive force generated by each phase winding can be stored in the corresponding damping capacitors C _d1 , C _d2 . Use without wasting. Moreover, the back electromotive force of the alternating current type generated by the first coil L ₁ and the second coil L ₂ of each phase winding can be respectively formed by the flywheel diodes D ₁ and D ₂ electrically coupled to the ends of each phase winding. The discharge path charges the damping capacitors C _d2 and C _d1 respectively to release energy, so that the driving circuit 5 does not generate high temperature, and the DC power source Vdc, for example, the battery is not burnt due to high temperature or affects its service life.

And the driving circuit 5 sequentially switches the four bridge arms 51-54 to conduct in turn, so as to control the rotation of each phase winding corresponding to each of the bridge arms 51-54 and the DC power source Vdc to continuously push the motor rotor. 42 operation. Therefore, when the phase windings are switched from the conducting state to the non-conductive state, the counter electromotive force generated by each phase winding charges the two damping capacitors C _d1 , C _d2 electrically coupled to the contact Y thereof, and The switching speed between the upper switch Qu and the lower switch Qn of one of the bridge arms 51 to 54 is very fast, about 400 Hz. Therefore, the damping capacitors C _d1 and C _{d2 of the} present embodiment can be selected from an operating frequency, for example, 300 to 1 KHz, which is equivalent to a non-polar intermediate frequency capacitor of a switching frequency. Moreover, during the operation of the driving circuit 5, the phase windings will alternately charge the damper capacitors C _d1 , C _d2 electrically coupled thereto in a continuous manner, so that the damper capacitors C _d1 , C _{d2 are} maintained in a state of full electric energy.

Thus, when the DC power source Vdc, e.g. battery voltage is lower than the DC power source Vdc are connected in series n, damped capacitor C _d1 between the negative ends, when the potential of the sum C _d2, damped capacitor C _d1, C _d2 that can Charging the DC power source Vdc in a timely manner, and increasing the power supply time of the DC power source Vdc, whereby if the present embodiment is applied to an electric traffic vehicle, such as an electric vehicle, the endurance of the electric vehicle can be increased; and when the reluctance motor is used 4 Short-time (or instantaneous) high-torque output is required. For example, when the electric vehicle accelerates or climbs the slope, the damping capacitors C _d1 and C _d2 can also provide the required power of the reluctance motor 4, so that the electric vehicle can generate more powerful. Manipulation performance.

In addition, it is worth mentioning that, in addition to directly using the DC power source Vdc, the driving circuit 5 of the embodiment can also use the AC power source AC, and only need to be electrically coupled to a rectification at the front end of the driving circuit 5 as shown in FIG. Filter A circuit, such as a conventional bridge rectification filter circuit 50, rectifies and filters an AC power source AC to produce a drive circuit 5 that supplies a DC power supply Vdc to the rear end. Thereby, the reluctance engine of the present embodiment can be applied to an electric machine using an alternating current, such as a large air conditioner or a heat pump, to achieve the effect of saving AC power.

Referring to FIG. 12 and FIG. 13 again, in this embodiment, a resonant inductor Lr and a resonant inductor Lr are further disposed on each of the two diametrically opposed salient poles of the rotor 42 such as salient poles R1, R1'. a resonant capacitor Cr connected in parallel, and when the salient poles R1, R1' are close to the two diametrically opposed salient poles S1, S1' of the stator 41, the resonant inductor Lr is first wound around the salient poles S1, S1', respectively The relative positional relationship between the coil L1 and the second coil L2 is as shown in FIG. 13, and the upper switch Qu of each of the bridge arms 51-54 is also reversely connected in parallel with a third flywheel diode Dp, and at each of the bridge arms 51. The lower switch Qn of ~54 is also connected in anti-parallel to a fourth flywheel diode Dn.

Therefore, as shown in FIG. 6 and FIG. 14, when the driving circuit 5 controls the upper switch Qu and the lower switch Qn of the bridge arm 51 electrically coupled to a phase winding, for example, the A phase winding, the DC power supply Vdc is turned on. The current flows through the first coil L ₁ and the second coil L _{2 of the} A-phase winding, so that the salient poles R1, R1' generating the magnetic attraction attracting rotor 42 are respectively moved toward the salient poles S1, S1' of the stator 41 (close to ), while the salient poles disposed around R1, the resonant inductor 'R1 Lr is induced from the first coil L ₁ and a second coil L, the resonant current i ₃ and ₂ of the resonant capacitor Cr is charged.

When the upper switch Qu and the lower switch Qn of the bridge arm 51 electrically connected to the A-phase winding are not turned on, the resonant capacitor Cr is discharged to the resonant inductor Lr, so that the salient poles S1 and S1 are disposed around the stator 41. a first coil L ₁ and L _2, respectively, a second induction coil on the 'flowing through the resonant inductor Lr is a discharging current i _4, and generate an induced voltage e3, e4 in the first coil L ₁ and L ₂ of the second coil . And the current formed by the induced voltage e3 is damped between the junction Y connected to the A-phase winding and the positive end of the DC power source Vdc via the third flywheel diode Dp in anti-parallel with the upper switch Qu of the bridge arm 51. The capacitor C _{d1 is} charged, and at the same time, the current formed by the induced voltage e4 charges the damper capacitor C _d2 connected between the junction Y of the A-phase winding and the negative terminal of the DC power source Vdc, and then passes through the lower switch with the bridge arm 51. Qn antiparallel to the fourth flywheel diode Dn back to the second coil L _2. Thereby, the rotor 42 can simultaneously transmit the resonant inductor Lr and the resonant capacitor Cr disposed on the two diametrically opposite salient poles R1, R1', R2, R2', R3, R3, R4, R4' during the rotation. Generating electric power (power generation), and storing the electric power via the phase windings of the stator 41 and the flywheel diodes Dp, Dn electrically coupled between the respective phase windings and the damping capacitors C _d1 , C _d2 in the corresponding damping capacitor C _{In d1} and C _d2 , the power supply time of the DC power supply Vdc (battery) can be further extended.

Further, as shown in FIGS. 6 and 7, the ends of the salient poles S1, S1', S2, S2', S3, S3', S4, and S4' of the stator 41 of the present embodiment are enlarged and concave to form a The end of each of the salient poles R1, R1', R2, R2', R3, R3 of the rotor 42 is enlarged and convex to form a respective salient pole S1, S1', S2 with the stator 41. The ends of S2', S3, S3', S4, and S4' are convexly curved. Thereby, the ends of the salient poles S1, S1', S2, S2', S3, S3', S4, and S4' of the stator 41 and the salient poles R1, R1', R2, and R2' of the rotor 42 can be enlarged. , R3 The coverage area of the end of R3, and shortening the distance between the ends of each of the salient poles S1, S1', S2, S2', S3, S3', S4, S4' of the stator 41, can effectively reduce the reluctance motor 4 The torque generated during the commutation process suppresses the reluctance motor 4 from generating vibration and noise during operation.

Furthermore, preferably, the stator 41 of the present embodiment can further adopt a reactive and radially conductive amorphous metal material, which has loose coupling characteristics to lower the temperature of the stator 41, thereby improving the reluctance motor 4. Power.

In summary, in this embodiment, each of the phase windings is electrically coupled by electrically coupling a damping capacitor C _d1 , C _d2 between the junction Y of each phase winding and the positive and negative ends of the DC power source Vdc. The instantaneous back electromotive force generated when the connected bridge arm is switched from conduction to non-conduction is timely coupled to the corresponding coupling by the flywheel diodes D ₁ and D ₂ electrically coupled to the two ends of each phase winding. The capacitors C _d1 and C _{d2 are} charged without causing a high voltage impact on the DC power source Vdc, and the power stored in the damper capacitors C _d1 , C _d2 can also supplement the DC power source Vdc in a timely manner, and extend the power supply of the DC power source Vdc. Time, and when the reluctance motor 5 needs a large torque output instantaneously, sufficient power can be supplied to the reluctance motor 5 at the same time; in addition, by providing parallel resonant inductance Lr and resonance on the two diametrically opposite salient poles of the rotor 42 The capacitor Cr causes the rotor 42 to induce current from the windings of the respective phases of the stator 41 during the rotation to generate electricity, and stores the electric power into the damping capacitors C _d1 and C _d2 through the respective phase windings, thereby further extending the DC power supply Vdc. Power supply time, and In this embodiment, the ends of the salient poles of the stator 41 are enlarged to form a concave arc shape, and the ends of the salient poles of the rotor 42 are enlarged to form a convex shape that cooperates with the ends of the salient poles of the stator 41. The arc shape can effectively reduce the tumbling torque generated by the reluctance motor 4 during the commutation process, and suppress the vibration and noise generated during the operation of the motor, so that the object of the present invention can be achieved.

The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, that is, the simple equivalent changes and modifications made by the patent application scope and patent specification content of the present invention, All remain within the scope of the invention patent.

5‧‧‧Drive circuit

51~54‧‧‧Bridge arm

L ₁ ‧‧‧first coil

L ₂ ‧‧‧second coil

Y‧‧‧Contact

Vdc‧‧‧DC power supply

C _d1 , C _d2 ‧‧‧ damping capacitor

Qu‧‧‧Up switch

Qn‧‧‧ switch

D ₁ ‧‧‧First flywheel diode

D ₂ ‧‧‧Second flywheel diode

N1‧‧‧ one end

N2‧‧‧Other end

Claims (10)

A reluctance engine that accepts a DC power input and includes: a reluctance motor having a stator and a rotor having M (M≧3) phase windings, each phase winding having a radial relative position And a first coil and a second coil connected in series with a contact; and a driving circuit comprising: M bridge arms connected in parallel with the DC power supply and electrically coupled one to one with the M phase winding, each bridge The arm has an upper switch electrically coupled to one end of the corresponding phase winding, a lower switch electrically coupled to the other end of the corresponding phase winding, and a reverse electrical coupling at one end of the phase winding a first flywheel diode between the negative ends of the DC power source, and a second flywheel diode electrically coupled between the other end of the phase winding and the positive terminal of the DC power source; and 2 x M Damping capacitors respectively connected between the contact of each phase winding and the positive end of the DC power source, and between the contact and the negative terminal of the DC power source, and when the upper switch of one of the bridge arms The lower switch is turned on, and is electrically coupled to the phase between the upper switch and the lower switch The winding is connected to the DC power source to generate magnetic energy to drive the rotor to rotate, and when the upper switch and the lower switch of the bridge arm are not conducting, the first coil of the phase winding instantaneously generates a counter electromotive force via the second flywheel The pole body charges the damping capacitor electrically coupled between the junction of the phase winding and the negative terminal of the DC power source, and the second coil of the phase winding instantaneously generates a counter electromotive force via the first flywheel a pair of poles electrically coupled to the junction of the phase winding and The damping capacitor is charged between the positive ends of the DC power source. The reluctance engine according to claim 1, wherein the DC power source is a battery, and when a damping capacitor connected between the contact of each phase winding and the positive terminal of the DC power source is connected to the connection The damped capacitor charges the battery when the voltage in series between the point and the negative terminal of the DC power source is greater than the voltage of the battery. The reluctance engine of claim 1, further comprising a rectifying and filtering circuit electrically coupled between the driving circuit and an alternating current power source, wherein the alternating current power source is rectified and filtered to generate the direct current power supply to the driving circuit . The reluctance engine according to any one of claims 1 to 3, wherein the damper capacitor is a non-polar IF capacitor having an operating frequency range of 300 to 1000 Hz. The reluctance engine according to claim 1, wherein the stator has 2 x M salient poles, and the first coil and the second coil of each phase winding of the stator are respectively disposed on two diametrically opposite salient poles. And the rotor has 2 x N (2 < N < M) salient poles. The reluctance engine according to claim 5, wherein the driving circuit further comprises N resonant inductors respectively disposed on the two salient poles of the rotor opposite to each other, and N corresponding to the respective resonant inductors. a parallel resonant capacitor, three third flywheel diodes respectively connected in parallel with the corresponding upper switch of the bridge arm, and M parallel and parallel connected to the corresponding lower switch of the bridge arm a four flywheel diode, and when the upper switch and the lower switch of one of the driving circuits are turned on, so that the phase winding electrically coupled between the phase winding and the direct current power source are connected, the rotor is close to the phase winding The resonant inductors disposed on the two symmetrical salient poles induce current and charge the resonant capacitor, and when the upper and lower switches of the bridge arm are not conducting, so that the phase winding is not connected to the DC power source Dissipating the resonant capacitor toward the resonant inductor such that a first coil of the phase winding induces a current and is coupled to the junction of the phase winding via the third flywheel diode pair in anti-parallel with the upper switch The damper capacitor between the positive ends of the DC power source is charged while causing the second coil of the phase winding to induce a current and to connect the fourth flywheel diode pair in anti-parallel with the lower switch to the phase winding The damper capacitor is charged between the contact and the negative terminal of the DC power source. The reluctance engine according to claim 5, wherein each of the salient pole ends of the stator is enlarged and concave to form a concave arc shape, and each of the salient pole ends of the rotor is enlarged and convex to form a Each of the salient pole ends of the stator cooperates in a convex arc shape. A reluctance motor driving circuit, the reluctance motor having a stator and a rotor, the stator having M (M≧3) phase windings, each phase winding having one disposed at a radial relative position and connected in series with a contact a first coil and a second coil, and the driving circuit receives the DC power input and includes: M bridge arms connected in parallel with the DC power source and electrically coupled one to one with the M phase winding, each bridge arm having a a corresponding upper switch electrically coupled to one end of the phase winding, a lower switch electrically coupled to the other end of the corresponding phase winding, and a reverse electrical coupling at one end of the phase winding and the DC power supply a first flywheel diode between the negative ends, and a second reverse electrical coupling between the other end of the phase winding and the positive end of the DC power source a flywheel diode; and 2xM damping capacitors respectively connected between the junction of each phase winding and the positive terminal of the DC power source, and between the contact and the negative terminal of the DC power source, and When the upper switch and the lower switch of one of the bridge arms are turned on, the phase winding electrically coupled between the upper switch and the lower switch is connected to the DC power source to generate magnetic energy to drive the rotor to rotate, and when the bridge arm The upper switch and the lower switch are non-conducting, and the first coil of the phase winding instantaneously generates a counter electromotive force electrically coupled to the contact of the phase winding and the negative end of the DC power supply via the second flywheel diode pair The damping capacitor is charged while the second coil of the phase winding instantaneously generates a counter electromotive force that is electrically coupled to the junction of the phase winding and the positive terminal of the DC power source via the first flywheel diode pair. The damping capacitor is charged between. A reluctance motor comprising: a stator having 2xM (M≧3) salient poles and an M-phase winding, the ends of each salient pole being enlarged and concave to form a concave arc shape, and each phase winding has a respective a first coil and a second coil connected in series on the two diametrically opposite salient poles of the stator; and a rotor disposed on the inner ring of the stator and having 2xN (2<N<M) Salient poles, and the ends of each of the salient poles are enlarged and convex to form a convex arc shape that cooperates with each of the salient pole ends of the stator. The reluctance motor according to claim 9, further comprising N resonant inductors respectively disposed on the two salient poles of the rotor opposite to each other, and N resonances in parallel with the corresponding respective resonant inductors capacitance.