CN2074074U - Variable-frequency controlled stepless speed-regulating motor - Google Patents
Variable-frequency controlled stepless speed-regulating motor Download PDFInfo
- Publication number
- CN2074074U CN2074074U CN 90214186 CN90214186U CN2074074U CN 2074074 U CN2074074 U CN 2074074U CN 90214186 CN90214186 CN 90214186 CN 90214186 U CN90214186 U CN 90214186U CN 2074074 U CN2074074 U CN 2074074U
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- CN
- China
- Prior art keywords
- motor
- speed
- variable
- variable frequency
- stepless speed
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- Control Of Multiple Motors (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
The utility model discloses a variable-frequency controlled stepless speed-regulating motor, comprising a main engine, an auxiliary engine, a blower and a speed-regulating system. The main engine and the auxiliary engine are in negative sequence connection of the space position, the blower is arranged at the heat radiation position of the motor, the speed regulating system is composed of a variable-frequency power supply and a motor; the blower is an independent cooling device whose cooling capacity is not limited to the speed regulation. The variable-frequency controlled stepless speed-regulating motor has the advantages of simple structure, strong load capacity, convenient control, simple starting, high stability and low cost.
Description
The utility model belongs to the motor of variable frequency control stepless speed regulation.
Motor speed adjusting is divided into two kinds in the prior art, and a kind of is step speed regulation, and another kind is stepless speed regulation.Stepless speed regulation is divided into serial-resistance speed-regulation in the coiling type asynchronous motor rotor loop, electromagnetic slip clutch speed governing, tandem control, frequency control, variable voltage control by speed control principle.More than these several modes of speed regulation have following shortcoming: 1. coiling type asynchronous motor rotor loop serial-resistance speed-regulation, because crosstalk resistance back rotor resistance increases, make the deliquescing of electrical machinery characteristic, thereby poor stability, speed adjustable range is little, speed adjustable range is subjected to the influence of load torque, speed governing energy consumption height, and efficient is low; 2. electromagnetic slip clutch speed governing mechanical property is very soft, efficient is low, has uncontrollable district; 3. there is additional applying electrical potential identical with rotor frequency in the rotor loop in tandem control, because being the variation with rotating speed or slip frequency, the electromotive force frequency of rotor changes, therefore, the frequency of applying electrical potential also just must change with the variation of rotor speed, obtain the power supply that a frequency can change with rotating speed, more complicated technically, equipment is huge; 4. frequency control is a kind of advanced speed regulating method, but since the principle of frequency control be variable frequency power supply as operation source, whole system ground, therefore, the capacity of variable frequency power supply is big, cost height, and can not change the mechanical property of motor.
The purpose of the utility model variable frequency control motor with stepless speed regulation is that it is made up of main frame, secondary machine, blower fan, main frame is the main undertaker of system power output, main frame absorbs the electric energy mutual inductance from electrical network and gives rotor loop, power component is converted to mechanical power output, reactive component is improved the power factor of secondary machine in secondary machine excitation.Secondary machine absorbs the variable frequency power supply electric work, and rotor loop is given in mutual inductance, and power component is converted to mechanical energy, and reactive component is improved the main engine power factor for encourage energy in main frame, and this is the motor power conversion.
The utility model variable frequency control motor with stepless speed regulation is simple in structure, and cost is low, and Motor Control power is little, and the control capacity is about below 20% of power output.The motor speed good stability, its mechanical property has the synchronous motor characteristic, is particularly suitable for requiring the high occasion of speed stability to use.When multiple motors requires speed stabilizing and adjusted in concert, get final product with a variable frequency power supply control multiple motors.The efficient height makes the motor efficiency height, and high overload capacity is arranged under the prerequisite of the ratio of major-minor machine rotor electromotive force.Quite wide speed ratio is arranged, and speed ratio can make speed ratio reach more than the 1:100 under the little condition of variable frequency power supply frequency conversion scope, and low cruise stability and load capacity are stronger.The control aspect, starting is simple, and starting is similar with normal asynchronous, enters the synchronous operation state easily.
The utility model variable frequency control motor with stepless speed regulation takes following solution to realize.It is made up of main frame, secondary machine, rotor wiring, blower fan, variable frequency power supply, by the rotor coil locus each other backward join.Blower fan is arranged on the heat radiation position of motor.Governing system is made up of variable frequency power supply and motor, and motor is born energy converting between mechanical, and variable frequency power supply is born speed regulating control.Main frame is the main undertaker of system power output, and main frame absorbs the electric energy mutual inductance from electrical network and gives rotor loop, and power component is converted to mechanical power output, and reactive component is improved the power factor of secondary machine in secondary machine excitation.Secondary machine absorbs the variable frequency power supply electric work, and rotor loop is given in mutual inductance, and power component is converted to mechanical energy, and reactive component is improved the main engine power factor for encourage energy in main frame, makes the motor power conversion.Blower fan is the independent cooling device of motor, and cooling capacity is subjected to the restriction of speed governing.
The utility model variable frequency control motor with stepless speed regulation will further describe in conjunction with the accompanying drawings.
Fig. 1 is the cutaway view of the utility model variable frequency control motor with stepless speed regulation.
Fig. 2 is secondary machine stator wiring control principle figure of the present utility model.
Fig. 3 is main frame stator wiring control principle figure of the present utility model.
Fig. 4 is the rotor coil of the present utility model locus backward schematic diagram that joins each other.
With reference to Fig. 1,2,3,4, the utility model variable frequency control motor with stepless speed regulation is made up of main frame (1) and secondary machine (2) rotor wiring (3) blower fan (4) variable frequency power supply (5), by the rotor coil locus each other backward join, blower fan (4) is arranged on motor heat radiation position.Governing system is made up of variable frequency power supply (5) and motor.Motor is born energy converting between mechanical, and variable frequency power supply (5) is born speed regulating control.Main (1) is the main undertaker of system power output, main frame (1) absorbs the electric energy mutual inductance from electrical network and gives rotor loop, power component is converted to mechanical power output, and reactive component is improved the power factor of secondary machine (2) in secondary machine (2) excitation, secondary machine (2) absorbs variable frequency power supply (5) electric work, rotor loop is given in mutual inductance, and power component is converted to mechanical energy, and reactive component can for encouraging in main frame (1), improve main frame (1) power factor, make the motor power conversion.Blower fan (4) is independent cooling device, and cooling capacity is not subjected to the restriction of speed governing.
The variable frequency power supply of the utility model governing system (5) has performance and is: when the load object has the then curable relation of variable frequency power supply (5) u-f of specific M during at n.When the load object during at n M be that random quantity and excursion are very big, then u-f is a dynamic tracking, follows the tracks of according to being benchmark with secondary machine (2) stator voltage current phase.Motor is in speed regulation process, when rotating speed is higher than 1/2n
1During synchronous speed (supposition main frame (1), p is identical for secondary machine (2)) secondary machine (2) air-gap field turn to main frame (1) air-gap field turn to identical, promptly secondary machine (2) stator phase sequence identical with main frame (1) stator phase sequence (host A, B, C and secondary machine A, B, C).When rotating speed is lower than 1/2n
1The time, secondary machine (2) air-gap field is opposite with main frame (1) air-gap field, and promptly secondary machine (2) stator phase sequence opposite with main frame (1) phase sequence (host A, B, C and secondary machine A, B, C) is at 1/2n
1The time secondary machine (2) stator be DC excitation.Be higher than 1/2n at motor speed
1The time, motor speed is 1/2(n
1+ n
2).Be lower than 1/2n at motor speed
1The time, motor speed is 1/2(n
1-n
2), n
1, n
2Be respectively the rotating speed of the secondary machine of main frame (1) (2) air-gap field.If when defining secondary machine (2) air-gap field and having the direction value simultaneously, 1/2(n then
1+ n
2) the motor speed formula is general.Because n
1With n
2Turn to when identical n
2For on the occasion of, n when opposite
2Negative value.For avoiding 1/2n
1, can make main frame (1) or secondary machine (2) pole-changing, purpose is avoided low frequency range to variable frequency power supply (5).
The utility model variable frequency control motor with stepless speed regulation is simple in structure, and cost is low, good stability, and the efficient height, load capacity is strong, and control is convenient, and starting is simple, and the scope of application is wide, is easy to apply.
Claims (2)
1, a kind of variable frequency control motor with stepless speed regulation of forming by main frame (1) and secondary machine (2) rotor wiring (3) blower fan (4) variable frequency power supply (5), it is characterized in that the rotor coil locus each other backward join.
2,, it is characterized in that governing system is made up of variable frequency power supply (5) and motor according to the described variable frequency control motor with stepless speed regulation of claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90214186 CN2074074U (en) | 1990-08-04 | 1990-08-04 | Variable-frequency controlled stepless speed-regulating motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90214186 CN2074074U (en) | 1990-08-04 | 1990-08-04 | Variable-frequency controlled stepless speed-regulating motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2074074U true CN2074074U (en) | 1991-03-27 |
Family
ID=4893608
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90214186 Withdrawn CN2074074U (en) | 1990-08-04 | 1990-08-04 | Variable-frequency controlled stepless speed-regulating motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2074074U (en) |
-
1990
- 1990-08-04 CN CN 90214186 patent/CN2074074U/en not_active Withdrawn
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |