CN104767336A - A single-phase separately excited reluctance generator - Google Patents

Abstract

A single-phase separately-excited magneto-resistive power generator comprises a stator, a rotor, excitation windings and an armature winding and is of a doubly-salient structure. Salients are arranged on the stator and the rotor. The number of the salients on the stator and the number of the salients on the rotor are the same and are even. The excitation windings are wound on the salients of the stator in a centralized mode, and winding coils on the adjacent salients are connected in series to form a one-phase excitation winding. The excitation windings on the adjacent salients of the stator are opposite in winding direction so that magnetic poles with alternative N poles and S poles can be formed on the adjacent salients of the stator. The armature winding is wound in a centralized mode, the winding coils on the adjacent salients are connected in series, and the armature winding can be wound on the salients of the stator and can also be wound on the salients of the rotor. The rotor of the power generator can be an outer rotor to form an outer rotor structure power generator, and can also be an inner rotor to form an inner rotor structure power generator.

Description

A single-phase separately excited reluctance generator

technical field

The invention relates to a single-phase separately excited reluctance generator, which belongs to the field of reluctance motors.

Background technique

The traditional reluctance generator adopts a multi-phase structure, and each stator salient pole is wound with a concentrated excitation coil, and the excitation coils on two radially opposite stator salient poles are connected in series to form a stator winding of one phase, of which three Phase reluctance generators are the most common. Moreover, most existing multiphase reluctance generators adopt a 6/4 structure, and the number of salient poles on the stator and the number of salient poles on the rotor are not equal. The multi-phase reluctance generator has many phases, its stator connection is relatively complicated, and the system cost is high. Due to the existence of permanent magnets in permanent magnet generators, permanent magnet motors are not easy to be controlled, and permanent magnets have demagnetization phenomena. With severe mechanical vibration, irreversible demagnetization may occur, resulting in low stability of the motor and even making it unusable. The constant power factor of the motor plays a vital role in the operation characteristics of the generator and the grid. The present invention is a separately-excited single-phase reluctance generator, which overcomes many shortcomings of existing motors, adopts a single-phase excitation method to realize constant power factor control of the motor, and simultaneously simplifies the connection of the excitation coil on the stator, and has a simple and strong mechanical structure. , reduced system cost, wide application range and other advantages.

Contents of the invention

The technical problem to be solved by the present invention is to provide a single-phase separately excited reluctance generator, which has constant power factor control, simple structure, low cost, convenient maintenance, long service life and high reliability. High, wide application and other advantages.

To achieve the above object, the technical solution adopted by the present invention is a single-phase separately excited reluctance motor, which includes a stator (1), a rotor (2), an excitation winding (3), and an armature winding (4). The rotor (2) has two arrangements, that is, the rotor (2) is on the inner side of the stator (1) or the outer side of the stator (1); the rotor (2) is connected with the transmission shaft and driven by the rotor (2) . The stator (1) is fixed on the motor housing. The stator (1) is provided with stator salient poles (6) at equal intervals, and the rotor (2) is provided with rotor salient poles (7) at equal intervals, the number of stator salient poles (6) and rotor salient poles (7) is equal and is an even number. There is an air gap between the salient poles of the stator (6) and the salient poles of the rotor (7). The excitation windings (3) are wound on the stator salient poles (6) and the excitation windings (3) on the adjacent stator salient poles (6) are wound in opposite directions to form NS poles alternately. A closed magnetic circuit (5) is formed between the adjacent stator salient poles (6) and corresponding rotor salient poles (7). The armature winding (4) is wound on the stator salient pole (6) or on the rotor salient pole (7).

The stator (1) and rotor (2) are formed by laminating electrical silicon steel sheets.

Compared with the prior art, the present invention has the following beneficial effects.

1. The present invention has only one single-phase centralized excitation winding, and the control is simple. As long as the excitation winding is energized, all stator salient poles will generate NSNS alternating magnetic poles, without permanent magnets, which reduces costs and improves efficiency.

2. By controlling the magnitude of the single-phase excitation current, the reactive power of the generator can be controlled, and combined with the detection of the generator speed, the closed-loop control of the constant power factor of the generator can be realized.

3. The present invention can have an outer rotor structure or an inner rotor structure, and the armature winding can be wound on the salient poles of the stator or on the salient poles of the rotor. The structure is flexible and applicable to a wide range of occasions.

4. In the generator of the present invention, both the stator and the rotor are formed by pressing silicon steel sheets. The processing is simple, the structure is firm, and the material and production costs are low.

Description of drawings

Fig. 1 is the front view of a kind of single-phase separately excited reluctance generator with inner rotor and armature coil wound on the stator of the present invention;

Fig. 2 is a side view of a single-phase separately excited reluctance generator with an inner rotor and an armature coil wound on a stator of the present invention

Fig. 3 is the front view of a kind of single-phase separately excited reluctance generator with inner rotor and armature coil wound on the rotor of the present invention;

Fig. 4 is the side view of a kind of single-phase separately excited reluctance generator with inner rotor and armature coil wound on the rotor of the present invention;

Fig. 5 is the front view of a kind of single-phase separately excited reluctance generator with outer rotor and armature coil wound on the stator of the present invention;

Fig. 6 is the side view of a kind of single-phase separately excited reluctance generator with outer rotor and armature coil wound on the stator of the present invention;

Fig. 7 is the front view of a single-phase separately excited reluctance generator with an outer rotor and an armature coil wound on the rotor of the present invention;

Fig. 8 is a side view of a single-phase separately excited reluctance generator with an outer rotor and an armature coil wound on the rotor of the present invention;

In the figure: 1, stator, 2, rotor, 3, field winding, 4, armature winding, 5 magnetic circuit, 6 stator salient pole, 7 rotor salient pole. the

Detailed ways

The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.

Embodiment one

A single-phase separately excited reluctance generator, comprising a stator (1), a rotor (2), an excitation winding (3), and an armature winding (4). Below in conjunction with Fig. 1, Fig. 2, Fig. 3 and Fig. 4 illustrate specific embodiment, a kind of single-phase separately excited reluctance generator described in this embodiment is inner rotor structure, and promptly described rotor (2) is in described stator (1) inside. The number of stator salient poles (6) is equal to the number of rotor salient poles (7), and is an even number. The stator (1) is fixed on the casing of the generator. The rotor (2) is connected with the transmission shaft, and the rotor (2) rotates with the transmission shaft. The excitation winding (3) is wound on the stator salient pole (6), the excitation coils (3) on the adjacent stator salient poles (6) are wound in opposite directions, and the excitation coils (3) on the adjacent stator salient poles (6) The coils (3) are sequentially connected in series to form a single-phase concentrated excitation winding. The single-phase concentrated excitation winding feeds current to form NS alternating magnetic poles on adjacent stator salient poles. In this embodiment, the armature winding (4) is wound on the salient pole (6) of the stator, as shown in FIG. 1 , or wound on the salient pole (7) of the rotor, as shown in FIG. 3 . The armature windings (4) on adjacent salient poles are serially connected in series to form single-phase centralized armature windings.

When working, the excitation winding (3) passes current to form NS alternating magnetic poles (5) on the adjacent stator salient poles, the rotor (2) rotates with the transmission shaft, the stator salient poles (6) and the rotor salient poles ( 7) Alternately facing, at this time the magnetic flux in the armature winding (4) will change alternately, that is, the armature winding (4) will induce an electromotive force. The reactive power of the generator can be controlled by controlling the magnitude of the excitation current, and the constant power factor control of the generator can be realized in conjunction with the detection of the rotor speed.

Embodiment two

A single-phase separately excited reluctance generator, comprising a stator (1), a rotor (2), an excitation winding (3), and an armature winding (4). The specific implementation will be described below with reference to FIG. 5 , FIG. 6 , FIG. 7 and FIG. 8 . The single-phase separately excited reluctance generator described in this embodiment has an outer rotor structure, that is, the rotor (2) is outside the stator (1). The number of stator salient poles (6) is equal to the number of rotor salient poles (7), and is an even number. The stator (1) is fixed on the casing of the generator. The rotor (2) is connected with the transmission shaft, and the rotor (2) rotates with the transmission shaft. The excitation winding (3) is wound on the stator salient pole (6), the excitation winding (3) on the adjacent stator salient pole (6) is wound in the opposite direction, and the excitation winding (3) on the adjacent stator salient pole (6) The windings (3) are sequentially connected in series to form a single-phase concentrated excitation winding. The single-phase concentrated excitation winding feeds current to form NS alternating magnetic poles on adjacent stator salient poles. In this embodiment, the armature winding (4) is wound on the salient pole (6) of the stator, as shown in FIG. 5 , or wound on the salient pole (7) of the rotor, as shown in FIG. 7 . The armature windings on adjacent salient poles are connected in series to form a single-phase centralized armature winding.

When the generator is working, the excitation winding (3) is supplied with a single-phase current, and NS alternating magnetic poles (5) will be formed on the adjacent stator salient poles (6). The rotor (2) rotates with the transmission shaft, and the stator salient poles (6) Alternately facing the salient poles of the rotor (7), at this time the magnetic flux in the armature winding (4) will alternately change, that is, the armature winding (4) will induce an electromotive force. The reactive power of the generator can be controlled by controlling the magnitude of the excitation current, and the constant power factor control of the generator can be realized in conjunction with the detection of the rotor speed.

The above is a preferred embodiment of the present invention, and the scope of protection of the present invention is not limited to the above embodiments, but all equivalent modifications or changes made by those skilled in the art based on the content disclosed in the present invention should be included in this document. The scope of protection described in the claims.

Claims (6)

1. A single-phase separately excited reluctance motor is characterized in that: the motor comprises a stator (1), a rotor (2), a field winding (3), an armature winding (4); the rotor (2) has two One arrangement, that is, the rotor (2) is on the inner side of the stator (1) or the outer side of the stator (1); the rotor (2) is connected to the transmission shaft and driven by the rotor (2); the stator (1) is fixed on the motor On the casing; the stator (1) is provided with stator salient poles (6) at equal intervals, and the rotor (2) is provided with rotor salient poles (7) at equal intervals, and the stator salient poles (6) and rotor salient poles (7) The numbers are equal and even; there is an air gap between the stator salient pole (6) and the rotor salient pole (7); the excitation winding (3) is wound on the stator salient pole (6) and adjacent to the stator The excitation windings (3) on the salient poles (6) are wound in opposite directions to form NS poles alternately; a closed magnetic circuit (5) is formed between the adjacent stator salient poles (6) and the corresponding rotor salient poles (7). ); the armature winding (4) is wound on the salient pole of the stator (6) or wound on the salient pole of the rotor (7). 2. A single-phase separately excited reluctance motor according to claim 1, characterized in that: said stator (1) and rotor (2) are made of laminated electrical silicon steel sheets. 3. A single-phase separately excited reluctance motor according to claim 1, characterized in that: a single-phase separately excited reluctance generator comprising a stator (1), a rotor (2), an excitation winding (3) , armature winding (4); described a kind of single-phase separately excited reluctance generator is inner rotor structure, promptly described rotor (2) is in described stator (1); described stator salient pole (6) The number is equal to the number of poles of the rotor convex (7), and is an even number; the stator (1) is fixed on the generator casing; the rotor (2) is connected with the transmission shaft, and the rotor (2) rotates with the transmission shaft ; The excitation winding (3) is wound on the stator salient pole (6), the excitation coil (3) on the adjacent stator salient pole (6) is wound in the opposite direction, and the excitation coil (3) on the adjacent stator salient pole (6) The excitation coils (3) are connected in series to form a single-phase centralized excitation winding; the single-phase centralized excitation winding passes current to form NS alternating magnetic poles on adjacent stator salient poles; the armature winding (4) is wound on the stator on the salient poles (6), or wound on the salient poles (7) of the rotor; the armature windings (4) on adjacent salient poles are serially connected in series to form single-phase centralized armature windings. 4. A single-phase separately-excited reluctance motor according to claim 3, characterized in that: when working, the field winding (3) passing current will form NS alternating magnetic poles (5) on adjacent salient poles of the stator ), the rotor (2) rotates with the transmission shaft, and the salient poles of the stator (6) and the salient poles of the rotor (7) are alternately facing each other. At this time, the magnetic flux in the armature winding (4) will change alternately, that is, the armature winding (4 ) will induce an electromotive force; the reactive power of the generator can be controlled by controlling the magnitude of the excitation current, and then the constant power factor control of the generator can be realized in conjunction with the detection of the rotor speed. 5. A kind of single-phase separately excited reluctance motor according to claim 1, characterized in that: a single-phase separately excited reluctance generator comprising stator (1), rotor (2), field winding (3) , armature winding (4); described a kind of single-phase separately excited reluctance generator is outer rotor structure, and promptly described rotor (2) is outside described stator (1); Described stator salient pole (6) The number is equal to the number of the rotor salient poles (7), and is an even number; the stator (1) is fixed on the generator casing; the rotor (2) is connected with the transmission shaft, and the rotor (2) rotates with the transmission shaft ; The excitation winding (3) is wound on the stator salient pole (6), the excitation winding (3) on the adjacent stator salient pole (6) is wound in the opposite direction, and the excitation winding (3) on the adjacent stator salient pole (6) The field windings (3) are connected in series to form single-phase concentrated field windings; the single-phase concentrated field windings pass current to form NS alternating magnetic poles on adjacent salient poles of the stator; the armature windings (4) are wound on the The stator salient poles (6) or are wound on the rotor salient poles (7); the armature windings on adjacent salient poles are connected in series to form single-phase centralized armature windings. 6. A single-phase separately-excited reluctance motor according to claim 5, characterized in that: when the generator is working, the field winding (3) is fed with a single-phase current, which will flow on the adjacent salient poles (6) of the stator Form NS alternating magnetic poles (5), the rotor (2) rotates with the transmission shaft, the stator salient poles (6) and the rotor salient poles (7) are alternately facing each other, at this time the magnetic flux in the armature winding (4) will alternate change, that is, the armature winding (4) will induce an electromotive force; the reactive power of the generator can be controlled by controlling the magnitude of the excitation current, and then the constant power factor of the generator can be realized in conjunction with the detection of the rotor speed control.