CN202978794U - Switched reluctance motor speed adjusting device - Google Patents
Switched reluctance motor speed adjusting device Download PDFInfo
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- CN202978794U CN202978794U CN 201220742210 CN201220742210U CN202978794U CN 202978794 U CN202978794 U CN 202978794U CN 201220742210 CN201220742210 CN 201220742210 CN 201220742210 U CN201220742210 U CN 201220742210U CN 202978794 U CN202978794 U CN 202978794U
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- 230000001276 controlling effect Effects 0.000 description 6
- 238000004146 energy storage Methods 0.000 description 4
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- 238000010248 power generation Methods 0.000 description 2
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- 238000006243 chemical reaction Methods 0.000 description 1
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Abstract
The utility model relates to a switched reluctance motor speed adjusting device. The switched reluctance motor speed adjusting device includes a feedback unit or rectifier bridge, an inversion unit, a braking unit, a power source supply unit, a power source switching circuit and a transformer; a feedback unit power circuit is connected with power grids through a feedback reactor or the rectifier bridge is directly connected with the power grids; the feedback unit power circuit or rectifier bridge is connected with an inversion unit power circuit through positive and negative buses; a filtering capacitor is connected between the positive and negative busses in a bridging manner; a braking unit power circuit is connected in parallel with two ends of the filtering capacitor; the inversion unit is connected with a motor; the power source supply unit is connected with the braking unit; a control power source of the feedback unit, a control power source of the braking unit, a control power source of the inversion unit are respectively connected with the transformer and the power source supply unit through the power source switching circuit; and the transformer is connected to the power grids. With the switched reluctance motor speed adjusting device of the utility model adopted, problems existing in the power supply of the control power sources when a system performs braking working after the outage of the power grids can be solved; according to the switched reluctance motor speed adjusting device, simple modification of an existing device is only required; and the switched reluctance motor speed adjusting device is advantageous in low cost and high reliability.
Description
Technical field
The utility model relates to a kind of switched reluctance motor speed adjusting device, especially relates to the switched reluctance motor speed adjusting device that can realize controlling Power supply when Braking system after grid cut-off is worked.
Background technology
Generally, four quadrant running can be realized with the switched reluctance motor speed adjusting device driving switch reluctance motor of brake unit, and the braking deceleration shutdown under the grid cut-off state can be realized.A kind of four-quadrant switches reluctance motor speed regulating device commonly used, structure chart as shown in Figure 1, rectifier bridge is connected by positive and negative busbar with the inversion unit power circuit, cross-over connection filter capacitor between positive and negative busbar.Rectifier bridge is realized the rectification to AC power, and inversion unit connects motor, the electronic or generator operation of drive motors SRM; Brake unit can carry out energy to bus and discharge in electric power generation operation or grid cut-off situation.
For the long-time generator operation of implement device has again the power-off brake function concurrently, a kind of improved switched reluctance motor speed adjusting device is proposed again afterwards, structure chart as shown in Figure 2, each unit power circuit connects by positive and negative busbar, cross-over connection filter capacitor between positive and negative busbar.Wherein feedback unit connects electrical network by feedback reactor, possesses rectification and feedback function; Inversion unit connects motor, the electronic or generator operation of drive motors SRM; Brake unit can carry out energy to bus and discharge under grid cut-off or feedback unit failure condition.These speed regulating device have increased brake unit on the basis of speed regulating device shown in Figure 1, it is made of a plurality of parts such as controlling power supply, control circuit, promotion circuit, power circuit, brake resistance, has increased the complexity of system, has reduced reliability.
In addition, also there is following defective jointly in speed regulating device illustrated in figures 1 and 2:
Although the control Power supply of one or three unit can be taken from dc bus or AC power, or energy storage device, all has limitation.
Two, because mine leather belt or Lifting Convey system are generally the middle pressure (product of 660V ~ 3300V), when controlling power supply and take from dc bus, there is no ready-made product on the DC/DC converter market of middle pressure, need customized development, and the parts selection difficulty is larger, and reliability is low.
Take from AC power (power supplys different from major loop) if three control power supply, whole or partial electric grid outage is controlled power supply and also may be cut off the power supply, and so just can't realize the power-off brake stopping function; When the control power supply is taken from energy storage device, two kinds of battery and electric capacity are generally arranged, if needing independent flame proof (intrinsic safety) structure just can meet mining country peace, the energy storage devices such as employing storage battery mark requirement, technical sophistication realizes that difficulty is large; When adopting capacitance energy storage, quantity is too many, and limited space is difficult to realize placing.
The utility model content
For overcoming defects, the utility model provides a kind of switched reluctance motor speed adjusting device, the difficult problem of the control Power supply in the time of can solving Braking system work after grid cut-off, and only need to do simple transformation on the existing apparatus basis, cost is low, reliability is high.
The switched reluctance motor speed adjusting device that the utility model provides, comprise: feedback unit or rectifier bridge, inversion unit, brake unit, wherein, feedback unit comprises the feedback unit power circuit, inversion unit comprises the inversion unit power circuit, brake unit comprises brake resistance and brake unit power circuit, and feedback unit, inversion unit and brake unit also comprise respectively control circuit, control power supply and promote circuit; When this switched reluctance motor speed adjusting device adopts feedback unit, this switched reluctance motor speed adjusting device also comprises feedback reactor, the feedback unit power circuit connects electrical network by feedback reactor, and the feedback unit power circuit is connected by positive and negative busbar with the inversion unit power circuit; When this switched reluctance motor speed adjusting device adopted rectifier bridge, rectifier bridge directly connected electrical network, and rectifier bridge is connected by positive and negative busbar with the inversion unit power circuit; Cross-over connection filter capacitor between positive and negative busbar; The brake unit power circuit is connected to the two ends of filter capacitor; Inversion unit connects motor; Wherein, this switched reluctance motor speed adjusting device also comprises: Power supply unit, power supply switch circuit, transformer; The Power supply unit connects brake unit; The control power supply of the control power supply of feedback unit, the control power supply of brake unit and inversion unit is connected to transformer, Power supply unit by power supply switch circuit; Transformer connects electrical network.
Described brake unit power circuit adopts IGBT to consist of, and an end connects positive bus-bar, and the other end connects negative busbar by brake resistance.
Described Power supply unit comprises transformer, rectifier diode and filter capacitor, and transformer primary side connects brake resistance, after transformer secondary series diode with electric capacity and connect.
Described power supply switch circuit adopts analog control circuit or digital control circuit and contactor or relay formation.
Described digital control circuit is by one or more the constituting in PLC, single-chip microcomputer, DSP, ARM.
Described feedback reactor adopts single inductance or adopts inductance and capacitor combination.
The switched reluctance motor speed adjusting device that the utility model provides is by increasing power supply switch circuit, and the Power supply unit that is connected in brake unit, after grid cut-off, brake unit is started working, Power supply unit internal transformer becomes low pressure with the high pressure on brake resistance in brake unit, after rectification, by power supply switch circuit to controlling Power supply, thereby the difficult problem of the control Power supply when having solved Braking system work after the grid cut-off, and only need to do simple transformation on the existing apparatus basis, cost is low, reliability is high.
Description of drawings
Fig. 1 is the structural representation of existing a kind of switched reluctance motor speed adjusting device;
Fig. 2 is the structural representation of existing another kind of switched reluctance motor speed adjusting device;
Fig. 3 is the structural representation of the utility model switched reluctance motor speed adjusting device embodiment one;
Fig. 4 is the structural representation of the utility model switched reluctance motor speed adjusting device embodiment two.
Embodiment
Below in conjunction with drawings and Examples, the utility model is elaborated.
The switched reluctance motor speed adjusting device embodiment one that the utility model provides, as shown in Figure 3, comprise: rectifier bridge, inversion unit, brake unit, power supply source power supply unit, power supply switch circuit, transformer (being expressed as transformer 1 in Fig. 4), wherein, feedback unit comprises the feedback unit power circuit, inversion unit comprises the inversion unit power circuit, brake unit comprises brake resistance and brake unit power circuit, and feedback unit, inversion unit and brake unit also comprise respectively control circuit, control power supply and promote circuit.In this embodiment, the annexation of each circuit, module, unit is as follows: rectifier bridge is connected by positive and negative busbar with the inversion unit power circuit; Cross-over connection filter capacitor C between positive and negative busbar; The brake unit power circuit is connected to the two ends of filter capacitor C; Inversion unit connects motor SRM; The Power supply unit connects brake unit; The control power supply of the control power supply of feedback unit, the control power supply of brake unit and inversion unit is connected to transformer 1, Power supply unit by power supply switch circuit; Transformer 1 connects electrical network.
The switched reluctance motor speed adjusting device embodiment two that the utility model provides as shown in Figure 4, comprising: feedback reactor, feedback unit, inversion unit, brake unit, Power supply unit, power supply switch circuit, transformer (Fig. 3 is expressed as transformer 1); Wherein, feedback unit comprises the feedback unit power circuit, inversion unit comprises the inversion unit power circuit, and brake unit comprises brake resistance and brake unit power circuit, and feedback unit, inversion unit and brake unit also comprise respectively control circuit, control power supply and promote circuit.In this embodiment, the annexation of each circuit, module, unit is as follows: the feedback unit power circuit connects electrical network L1, L2, L3 by feedback reactor, and the feedback unit power circuit is connected by positive and negative busbar with the inversion unit power circuit; Cross-over connection filter capacitor C between positive and negative busbar; The brake unit power circuit is connected to the two ends of filter capacitor C; Inversion unit connects motor SRM; The Power supply unit connects brake unit; The control power supply of the control power supply of feedback unit, the control power supply of brake unit and inversion unit is connected to transformer 1, Power supply unit by power supply switch circuit; Transformer 1 connects electrical network.
The below describes the composition and working principle of unit in detail:
Brake unit is by brake resistance, and the brake unit power circuit promotes circuit, control circuit formation, and the brake unit power circuit adopts IGBT to consist of, and an end connects positive bus-bar, and the other end connects negative busbar by brake resistance.When detecting busbar voltage, the control circuit of brake unit raises when power cut-off or feedback unit fault occur simultaneously, produce PWM (pulse-width modulation) copped wave control signal, drive IGBT conducting, shutoff, energy unnecessary on bus is depleted on brake resistance.Play when feedback reactor is electronic and reduce the harmonic wave effect, during braking, the feedback electric current is carried out filtering.
Inversion unit is by inversion unit power circuit, promotion circuit, control circuit and control electric power generating composition, and according to driving switch reluctance motor type, the inversion unit power circuit can be single-phase or heterogeneous structure.During the motor powered operation, the control circuit of inversion unit produces electronic control signal by the rotor relative position of sense switch reluctance motor, by promoting the drives power circuit to the power supply of motor winding, electric energy is converted to mechanical energy at motor inductance first transition; During the motor braking operation, the control circuit of inversion unit produces brake control signal by the rotor relative position of sense switch reluctance motor, in motor inductance last transition by promoting the drives power circuit to motor winding excitation, mechanical energy is converted to electric energy, and inversion unit is converted to direct current energy with electric power generation and charges to dc bus.
Feedback unit is by feedback unit power circuit, promotion circuit, control circuit and control electric power generating composition, and the feedback unit power circuit adopts IGBT to consist of bridge architecture, can be single-phase or heterogeneous according to connecing power supply type.During the motor powered operation, the diode in parallel with IGBT plays rectifier bridge; During running under braking, control circuit detects busbar voltage and raises, and sends feedback and drives signal, through promoting the work of circuit conversion rear drive power circuit, the direct current on bus is reverse into the alternating current feedback grid according to inlet wire ac grid voltage phase sequence.
The Power supply unit comprises transformer (being expressed as transformer T1 in Fig. 3, Fig. 4), rectifier diode D1 and filter capacitor C1, and transformer T1 former limit connects brake resistance, after transformer T1 secondary series diode D1 with capacitor C 1 and connect.The Power supply unit can carry out step-down, rectification and filtering with the voltage on brake resistance, is connected to power supply switch circuit.
Power supply switch circuit adopts analog control circuit or digital control circuit and contactor to form, and contactor also can be changed to relay.
If power supply switch circuit adopts digital control circuit, digital control circuit can be by one or more the constituting in PLC, single-chip microcomputer, DSP, ARM.
Feedback reactor adopts single inductance or adopts inductance and capacitor combination.
The workflow of power supply switch circuit and Power supply unit matching is as follows:
When electrical network was normal, the control circuit of each unit and the power supply of power circuit provided by electrical network, sent into power supply switch circuit to controlling Power supply after 1 step-down of line voltage process transformer; When electrical network cut off the power supply suddenly, brake unit was started working, and power supply switch circuit is connected to the Power supply unit control power supply of each unit, controlled power supply this moment by Power supply unit power supply.
The utility model is by increasing power supply switch circuit, and the Power supply unit that is connected in brake unit, after grid cut-off, brake unit is started working, and Power supply unit internal transformer becomes low pressure with the high pressure on brake resistance in brake unit, after rectification, by power supply switch circuit to controlling Power supply, thereby the difficult problem of the control Power supply when having solved Braking system work after the grid cut-off, and only need to do simple transformation on the existing apparatus basis, cost is low, reliability is high.
It should be noted that at last: above embodiment only in order to the technical solution of the utility model to be described, is not intended to limit; Although with reference to previous embodiment, the utility model is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme that aforementioned each embodiment puts down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of each embodiment technical scheme of the utility model.
Claims (6)
1. switched reluctance motor speed adjusting device, comprise: feedback unit or rectifier bridge, inversion unit, brake unit, wherein, feedback unit comprises the feedback unit power circuit, inversion unit comprises the inversion unit power circuit, brake unit comprises brake resistance and brake unit power circuit, and feedback unit, inversion unit and brake unit also comprise respectively control circuit, control power supply and promote circuit;
When this switched reluctance motor speed adjusting device adopts feedback unit, this switched reluctance motor speed adjusting device also comprises feedback reactor, the feedback unit power circuit connects electrical network by feedback reactor, and the feedback unit power circuit is connected by positive and negative busbar with the inversion unit power circuit;
When this switched reluctance motor speed adjusting device adopted rectifier bridge, rectifier bridge directly connected electrical network, and rectifier bridge is connected by positive and negative busbar with the inversion unit power circuit;
Cross-over connection filter capacitor between positive and negative busbar;
The brake unit power circuit is connected to the two ends of filter capacitor;
Inversion unit connects motor;
It is characterized in that, this switched reluctance motor speed adjusting device also comprises: Power supply unit, power supply switch circuit, transformer; The Power supply unit connects brake unit; The control power supply of the control power supply of feedback unit, the control power supply of brake unit and inversion unit is connected to transformer, Power supply unit by power supply switch circuit; Transformer connects electrical network.
2. switched reluctance motor speed adjusting device according to claim 1, is characterized in that, described brake unit power circuit adopts IGBT to consist of, and an end connects positive bus-bar, and the other end connects negative busbar by brake resistance.
3. switched reluctance motor speed adjusting device according to claim 1, is characterized in that, described Power supply unit comprises transformer, rectifier diode and filter capacitor, and transformer primary side connects brake resistance, after transformer secondary series diode with electric capacity and connect.
4. switched reluctance motor speed adjusting device according to claim 1, is characterized in that, described power supply switch circuit adopts analog control circuit or digital control circuit and contactor or relay formation.
5. switched reluctance motor speed adjusting device according to claim 1, is characterized in that, described digital control circuit is by one or more the constituting in PLC, single-chip microcomputer, DSP, ARM.
6. switched reluctance motor speed adjusting device according to claim 1, is characterized in that, described feedback reactor adopts single inductance or adopts inductance and capacitor combination.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220742210 CN202978794U (en) | 2012-12-28 | 2012-12-28 | Switched reluctance motor speed adjusting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220742210 CN202978794U (en) | 2012-12-28 | 2012-12-28 | Switched reluctance motor speed adjusting device |
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| CN202978794U true CN202978794U (en) | 2013-06-05 |
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| CN 201220742210 Expired - Fee Related CN202978794U (en) | 2012-12-28 | 2012-12-28 | Switched reluctance motor speed adjusting device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103916059A (en) * | 2012-12-28 | 2014-07-09 | 北京中纺锐力机电有限公司 | Switched-reluctance-motor speed adjusting device |
| CN104779846A (en) * | 2014-01-10 | 2015-07-15 | 北京中纺锐力机电有限公司 | Switched reluctance motor speed regulating device, switched reluctance motor, and speed regulating device |
-
2012
- 2012-12-28 CN CN 201220742210 patent/CN202978794U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103916059A (en) * | 2012-12-28 | 2014-07-09 | 北京中纺锐力机电有限公司 | Switched-reluctance-motor speed adjusting device |
| CN103916059B (en) * | 2012-12-28 | 2017-02-22 | 尼得科（北京）传动技术有限公司 | Switched-reluctance-motor speed adjusting device |
| CN104779846A (en) * | 2014-01-10 | 2015-07-15 | 北京中纺锐力机电有限公司 | Switched reluctance motor speed regulating device, switched reluctance motor, and speed regulating device |
| CN104779846B (en) * | 2014-01-10 | 2018-05-11 | 尼得科（北京）传动技术有限公司 | Switched reluctance motor speed adjusting device, switched reluctance machines and speed regulating method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: NIDEC (BEIJING) DRIVE SYSTEM TECHNIQUE CO., LTD. Free format text: FORMER OWNER: BEIJING CHINA TEX MECHANICAL + ELECTRICAL ENGINEERING LTD. Effective date: 20150709 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20150709 Address after: 101102 Beijing, Tongzhou District Sheng King South Street, No. 13, No. 101, 201-1, 301, 15, Patentee after: Nideke (Beijing) Transmission Technology Co. Ltd Address before: 101102, Beijing, Zhongguancun science and Technology Park, Jinqiao Science and technology industrial base, 15 South four street, 16A, Tongzhou District Patentee before: Beijing China Tex Mechanical & Electrical Engineering Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130605 Termination date: 20181228 |