CN2741272Y - High-slip frequency-variable speed regulator - Google Patents
High-slip frequency-variable speed regulator Download PDFInfo
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- CN2741272Y CN2741272Y CN 200420029208 CN200420029208U CN2741272Y CN 2741272 Y CN2741272 Y CN 2741272Y CN 200420029208 CN200420029208 CN 200420029208 CN 200420029208 U CN200420029208 U CN 200420029208U CN 2741272 Y CN2741272 Y CN 2741272Y
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- feed motor
- brushless dual
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- control
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Abstract
The utility model discloses a high-slip frequency-variable speed regulator, comprising a brushless double-feedback motor and a frequency conversion device which is connected with the motor. The frequency conversion device comprises an inverting feedback unit which is connected with a frequency converter and a brushless double-feedback motor controlling unit. The utility model has simple structure and optimized process to realize the controlling of the working speed of the brushless double-feedback motor by the smaller power of the frequency conversion device and the lower voltage of the variable-frequency power source. The utility model can completely satisfy the requirement of the fans or the pumps. The energy efficient technology of the frequency conversion device of the brushless double-feedback motor has a wide application.
Description
Technical field
The utility model relates to a kind of RHVC of motor, is applicable to brushless dual-feed motor.
Background technology
Brushless dual-feed motor is a kind of New-type electric machine with speed governing advantage, and is comparatively advanced in the disclosed 02294621.7 Wound-rotor type brushless dual-feed motor of Chinese patent.The application of brushless dual-feed motor makes industry to the frequency Varying and speed changing method that is more suitable for this kind motor more urgent requirement arranged.
Existing common electric machine mode of speed regulation is a lot, wherein is preferably with frequency converter and provides the variable frequency power supply speed governing to motor.But transducer power is identical with power of motor could to satisfy job requirement owing to existing common electric machine requires, and for the bigger high-voltage motor of power, uses the high voltage converter investment too high, has restricted applying of motor variable-frequency speed-regulating power-saving technology.Especially motor is dragged blower fan, load of the pumps, industry needs a kind of frequency Varying and speed changing method and device thereof that is applicable to brushless dual-feed motor.
Summary of the invention
Problem to be solved in the utility model is, overcomes the above-mentioned defective that the technology of taking over exists, and provide a kind of can be less converter plant power and lower variable frequency power supply voltage, the device of the working speed of control brushless dual-feed motor.
The utility model purpose provides the high slippage RHVC of a kind of brushless dual-feed motor, with brushless dual-feed motor configuration less than the motor power output, be lower than the converter plant of power of motor winding operating voltage.
The utility model solves its technical problem and takes following technical scheme to realize, a kind of high slippage RHVC that provides according to the utility model, comprise, brushless dual-feed motor and the converter plant that connects with motor, wherein, a brushless dual-feed motor has control winding and power winding, one converter plant, it connects an inversion feedback unit and brushless dual-feed motor control unit by frequency converter; Described frequency converter input terminal inserts the low-voltage electric network source, and its lead-out terminal connects the control winding of brushless dual-feed motor; The dc terminal of described inversion feedback unit is connected with frequency converter dc terminal terminal same polarity, and its output is parallel to frequency converter input terminal low voltage electric network end; The control unit of brushless dual-feed motor respectively with frequency converter, inversion feedback unit, frequency converter input supply terminal, control winding input and power winding input, connect by the control survey unit, control unit connects a computer.
The technical problem that the utility model solves can also adopt following technical measures further to realize:
Aforesaid high slippage RHVC, wherein, it is transducer that described control survey unit connects.
Aforesaid high slippage RHVC, wherein, described brushless dual-feed motor has two kinds of winding number of poles differences, and the few winding of number of poles is connected with the high-voltage fence power supply as the power winding; Number of poles winding how is connected with converter plant as the control winding.
Aforesaid high slippage RHVC, wherein, described brushless dual-feed motor has two cover winding number of poles differences, and the few winding of number of poles is connected with the high-voltage fence power supply as the power winding; Number of poles winding how is connected with converter plant as the control winding.
Aforesaid high slippage RHVC, wherein, described brushless dual-feed motor has variable-pole winding, and power winding number of poles is few, is connected with the high-voltage fence power supply; Control winding number of poles is many, is connected with converter plant.
The utility model compared with prior art has significant advantage and beneficial effect.By above technical scheme as can be known, the utility model has following advantage at least under the structural arrangements of excellence:
The utility model with brushless dual-feed motor minority utmost point winding as a motor, most utmost point windings are as another motor, in specific speed adjustable range, brushless dual-feed motor speed adjustable range and actual engineering convention are coincide, realized with less converter plant power and lower variable frequency power supply voltage, the purpose of the working speed of control brushless dual-feed motor has very strong generalization.The utility model converter plant and brushless dual-feed motor are reasonable, simple configuration, can realize with less converter plant power and lower variable frequency power supply voltage, the working speed of control brushless dual-feed motor, thus, brushless dual-feed motor can be applied to blower fan, load of the pumps drags, especially the blower fan, the load of the pumps that drag of high-voltage motor can reduce the investment of speed regulating device greatly, make variable-frequency control technique become possibility, thereby save a large amount of electric energy in the extensive use of high-voltage motor field.The utility model is to have novelty, creativeness, practical good technology really.
Embodiment of the present utility model is provided in detail by following examples and accompanying drawing thereof.
Description of drawings
Fig. 1 is the utility model system wiring schematic diagram.
Embodiment
Below in conjunction with accompanying drawing and preferred embodiment, embodiment, structure, feature and effect thereof that foundation the utility model is provided, describe in detail as after.
As shown in Figure 1, a kind of high slippage RHVC comprises, brushless dual-feed motor 1 and the converter plant 2 that connects with motor, wherein,
One brushless dual-feed motor 1 is embedded with power winding Pp and control winding Pc on the stator, wherein, two winding number of poles differences, the few winding of number of poles is connected with the high-voltage fence power supply as power winding Pp; Number of poles winding how is connected with converter plant as control winding Pc;
Converter plant 2 connects an inversion feedback unit 24 by frequency converter 22 and brushless dual-feed motor control unit 23 is formed, and a universal frequency converter 22 input terminals insert the low-voltage electric network source, and its lead-out terminal connects the control winding Pc of brushless dual-feed motor; Aforementioned inversion feedback unit dc terminal is connected with frequency converter dc terminal terminal same polarity, and the output of inversion feedback unit is parallel to frequency converter 22 input terminal low voltage electric network ends; The control unit 23 of brushless dual-feed motor is that kernel control chip is formed with PLC, this control unit respectively with frequency converter 2, inversion feedback unit 4, frequency converter input supply terminal, Pc input and Pp input, connect by the control survey unit.
Design philosophy of the present utility model is according to the analysis of the speed governing characteristics and the engineering convention of blower fan, load of the pumps:
The working flow Q ∝ N (first power of rotating speed) of blower fan, pump class transported substance
The operating pressure H ∝ N of blower fan, pump class transported substance
2(quadratic power of rotating speed)
Blower fan, the required shaft power P ∝ N of pump class work
3(cube of rotating speed)
This shows that the variation that speed is very little all can cause the variation that shaft power is bigger, under the situation that satisfies actual needs flow and operating pressure, blower fan, pump class speed governing operation have obvious energy-saving effect.
In application of practical project, the nominal operation rotating speed of general blower fan, pump class is all corresponding with the same leg speed of common asynchronous moter.As:
The blower fan that two-pole machine drags, pump class working speed are 2940～2980rpm;
The blower fan that four utmost point motors drag, pump class working speed are 1460～1480rpm;
The blower fan that 6-pole motor drags, pump class working speed are 940～980rpm;
The blower fan that ends of the earth motor drags, pump class working speed are 720～740rpm;
When engineering design, usually press the dragging motor of the nominal operation rotating speed apolegamy corresponding power of blower fan, pump class because the variation of blower fan, pump class operating state, most occasions require its working speed by rated speed to low speed governing.
Therefore, the brushless dual-feed motor that is used for blower fan, pump class its operating rate scope when design must be considered the practical project convention, and its speed governing is generally only required from rated speed and generally promptly to be satisfied energy-conservation requirement fully to low speed governing about 30% to low speed governing.
The utility model is considered as the power winding Pp and the control winding Pc of brushless dual-feed motor the specific combination of two common electric machines based on known electric machine theory.
The relation of the magnetic flux density Bc of the magnetic flux density Bp of power winding Pp and control winding Pc:
Brushless dual-feed motor synchronous speed theoretical expression is:
Fc represents frequency converter out-put supply frequency
Fp represents the electric network source frequency
In fact aforesaid expression formula is only just set up when the magnetic flux density Bc size of the magnetic flux density Bp of power winding Pp and control winding Pc is suitable, and in speed regulation process, the magnetic flux density Bc of control winding changes, the scale of magnetic flux density Bp, the Bc of power winding and control winding also is to change, thereby N synchronous speed and not exclusively changing with fc, its actual speed can be below or above theoretical synchronous speed.As long as when brushless dual-feed motor is designed, make power winding Bp＞control winding Bc, get final product guaranteed output winding Pp input power Temp greater than control winding Pc input power Temc, to realize the more powerful motor power output of smaller power brushless dual-feed motor converter plant control.
The mode of connection of contrive equipment: the less winding of brushless dual-feed motor number of poles is connected with electric network source as power winding Pp, and electric network source frequency f p is generally 50Hz, and power winding number of poles can be 2,4,6,8 etc.; The more winding of brushless dual-feed motor number of poles is connected with converter plant as control winding Pc, and control winding number of poles can be 4,6,8,10,12 etc., and the combination principle of the two is:
Power winding Pp number of poles＜control winding Pc number of poles; Stator two windings are with the phase sequence wiring.
When working with the utility model, brushless dual-feed motor starts and can be generally below 65% of power winding Pp synchronous speed in certain range of speeds work with converter plant by control winding Pc.
When brushless dual-feed motor needs the work of higher rotation speed scope, be 65% when above of power winding Pp synchronous speed, power winding Pp can be inserted electric network source, this moment, the brushless dual-feed motor rotating speed was away from power winding Pp synchronous speed, and it is, the highest until near power winding Pp synchronous speed with higher slippage rotation speed operation.The converter plant 2 that the utility model uses universal frequency converter 22 configuration inversion feedback units 24 and motor control unit 23 to form, brushless dual-feed motor is when working than low engine speed range, the slip energy of part from the power winding will be arranged, after surpassing control winding Pc and needing, turn back to electrical network by the inversion feedback unit, how much feedback energy is regulated by control unit therebetween.The optimal field of the utility model is blower fan, the load of the pumps that high-voltage motor drags, and the speed adjustable range of its motor is controlled at 65%～100% of power winding synchronous speed.
In a word, brushless dual-feed motor is a kind of New-type electric machine, is embedded with two a kinds of cover or two cover windings that number of pole-pairs is different on this motor stator, and rotor is provided with cover identical with the stator winding number of pole-pairs or two cover windings or is " special cage modle " winding construction.Brushless dual-feed motor when work, winding power supply that gets access to grid on the stator, another winding connects converter plant, and the frequency of regulating this converter plant just can realize the brushless dual-feed motor speed governing operation.Power division between stator two windings depends on the size of two winding magnetic close (Bp, Bc).Generally, the Electromagnetic Design of brushless dual-feed motor has determined two winding magnetic close (relations of distribution of Bp＞Bc), that is the power division ratio between two windings.The winding that connects converter plant is called control winding Pc, and its power is less than the power winding Pp that is connected with high-voltage fence.
The model of quoting elementary cell in the utility model is as follows: brushless dual-feed motor 1: stator is a double-winding structure, and rotor is special cagelike structure; Pp=1, Pc=3; Converter plant 2:22 selects the universal frequency converter TD2000-4TXXXX of Ai Mosheng for use; 23 control unit core components are selected Siemens PLC CS7-300 for use; 24 inversion feedback units are selected model IPC-PF for use.
The above, it only is preferred embodiment of the present utility model, be not that the utility model is done any pro forma restriction, according to different application scenarios, the power supply program of aforesaid two windings and the control mode of the mode of connection and frequency converter, can change to some extent, it still belongs to the technical solution of the utility model.Every foundation technical spirit of the present utility model all still belongs in the scope of technical solutions of the utility model any simple modification, equivalent variations and modification that above embodiment did.
Claims (5)
1. one kind high slippage RHVC comprises, brushless dual-feed motor and the converter plant that connects with motor is characterized in that:
One brushless dual-feed motor has control winding and power winding,
One converter plant, it connects an inversion feedback unit and brushless dual-feed motor control unit by frequency converter;
Described frequency converter input terminal inserts the low-voltage electric network source, and its lead-out terminal connects the control winding of brushless dual-feed motor;
The dc terminal of described inversion feedback unit is connected with frequency converter dc terminal terminal same polarity, and its output is parallel to frequency converter input terminal low voltage electric network end;
The control unit of brushless dual-feed motor respectively with frequency converter, inversion feedback unit, frequency converter input supply terminal, control winding input and power winding input, connect by the control survey unit, control unit connects a computer.
2. high slippage RHVC as claimed in claim 1 is characterized in that: it is transducer that described control survey unit connects.
3. high slippage RHVC as claimed in claim 1 or 2 is characterized in that: described brushless dual-feed motor has two kinds of winding number of poles differences, and the few winding of number of poles is connected with the high-voltage fence power supply as the power winding; Number of poles winding how is connected with converter plant as the control winding.
4. high slippage RHVC as claimed in claim 1 or 2 is characterized in that: described brushless dual-feed motor has two cover winding number of poles differences, and the few winding of number of poles is connected with the high-voltage fence power supply as the power winding; Number of poles winding how is connected with converter plant as the control winding.
5. claim 1 or 2 described high slippage RHVC, it is characterized in that: described brushless dual-feed motor has variable-pole winding, and power winding number of poles is few, is connected with the high-voltage fence power supply; Control winding number of poles is many, is connected with converter plant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420029208 CN2741272Y (en) | 2004-06-23 | 2004-06-23 | High-slip frequency-variable speed regulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420029208 CN2741272Y (en) | 2004-06-23 | 2004-06-23 | High-slip frequency-variable speed regulator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2741272Y true CN2741272Y (en) | 2005-11-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420029208 Expired - Lifetime CN2741272Y (en) | 2004-06-23 | 2004-06-23 | High-slip frequency-variable speed regulator |
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| CN (1) | CN2741272Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100345372C (en) * | 2004-06-23 | 2007-10-24 | 河北工业大学电工厂 | Frequency variable speed-adjusting mechanism |
-
2004
- 2004-06-23 CN CN 200420029208 patent/CN2741272Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100345372C (en) * | 2004-06-23 | 2007-10-24 | 河北工业大学电工厂 | Frequency variable speed-adjusting mechanism |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20040623 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |