CN1723605A - Load and speed sensitive motor starting circuit and method - Google Patents
Load and speed sensitive motor starting circuit and method Download PDFInfo
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- CN1723605A CN1723605A CNA028297903A CN02829790A CN1723605A CN 1723605 A CN1723605 A CN 1723605A CN A028297903 A CNA028297903 A CN A028297903A CN 02829790 A CN02829790 A CN 02829790A CN 1723605 A CN1723605 A CN 1723605A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P1/00—Arrangements for starting electric motors or dynamo-electric converters
- H02P1/16—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters
- H02P1/42—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual single-phase induction motor
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Abstract
A circuit and method measures the voltage at the main motor winding (1) and detects the points in the electromagnetic wave cycle at which this voltage 'crosses' zero. The method and circuit also measures the voltage at the auxiliary motor winding (2). The voltages measured in the main winding (1) and in the auxiliary winding (2) are compared by the circuit (13) as a means for starting and restarting the auxiliary winding (2). The circuit and method also detects the points in the electromagnetic wave cycle where the current in the auxiliary winding 'crosses' zero and compares the phase of these current zero crossing points with a window pulse (11) that is generated when the main voltage crosses zero. When the zero current crossing points fall within the window pulse, the auxiliary winding (2) is up to proper operating speed and the auxiliary winding (2) is disconnected by the starting circuit. If the load on the main motor winding (1) increases or the main motor winding (1) speed decreases below a certain predetermined speed, the auxiliary winding (2) is switched back into the circuit to boost the speed of the main motor winding (1).
Description
Technical field
The cut-off switch and the circuit that the present invention relates generally to interchange (AC) motor and be used for using with the AC motor.More particularly, the present invention relates to the starting with the AC motor, or auxiliary winding circuit and the method used together, wherein, when from static starting motor, the auxiliary winding of excitation is then to specify electromotor velocity to disconnect.The invention still further relates to and be used for circuit and the method used with phase-splitting and capacitor motor.
Background technology
Single-phase AC motor produces alternating magnetic field, and one is at first drawn in a direction, and then when the reversing in magnetic field, it is very known drawing in the opposite direction.This is because encourage single-phase AC motor by an AC power.The main distinction between dissimilar single-phase AC motor is in specific direction, and how they begin starting motor.Usually by at motor reel, or some equipment or circuit that a side of rotor is introduced phase shift magnetic field are realized motor starting.
Split phase motor is realized their starting capability by have two independent windings that twine in motor stator.Separately two windings are so that a winding is used for starting.With having than more high-resistance littler conductor size winding starting of main winding or auxiliary winding.When starting motor, encourage two windings.The starting winding produces it seems the field of rotation.This rotation causes motor starting.Then, when electrical motors arrived predetermined speed, centrifugal switch disconnected the starting winding.
The configuration of the winding of capacitor motor and centrifugal switch be used in similar in the split phase motor.In capacitor motor, use capacitor so that produce phase shift and rotating field occurs with the starting windings in series.Equally, when electrical motors when the intended operation speed, thereby starting switch open, disconnect the starting winding, and motor remains in operation.Be used for a starting circuit that the motor with the type uses at U.S. patent No.4, open in 622,506.This method and apparatus of the present invention is the improvement of that starting circuit.
In existing electric field, the various switches that are used to control are arranged.Comprise the mechanical switch and the centrifugal exciter (centrifugal actuator) that are installed on the rotor, just as what mention indirectly before.There is the problem such as age limit, old damage, friction, vibrations, installation site, contact wear in the mechanical switch of centrifugal type.Equally, centrifugal switch comprises the radial elements that stops by the axial flow of motor, and this may weaken cooling.This radial elements also needs additional space in motor housing, this may produce trouble in various application.
Start in the winding parting system in known another one, hall effect sensor or pick-up winding (pick-up coil) are used for detecting motor speed with the excitation cut-off switch.This method because need add on the motor shaft and on the pick-up winding extra such as magnet parts and have problems.These extra parts and establishment may cause problem.
In another known parting system, after the initial excitation of motor, the starting timer.When timer expiry, the starting cut-off switch is so that disconnect auxiliary winding.This method is not load or rate-sensitive, but opposite, only at the fixed time after, disconnect auxiliary winding, and irrelevant and irrelevant with load with electromotor velocity.This method is limited to professional application, the wherein load on the known electric motor in advance, and is set time of delay thus.If the load on the increase motor, electromotor velocity will can not reach required threshold value in the cutout time of being mentioned.Another, if reduce load on the motor, motor is faster acceleration, and applies full voltage at the two ends of capacitor and reach than the required longer time, conversely, can damage motor and/or capacitor.During the load of the motor in reducing the timing parting system, it is significant problem that capacitor blows.
Another known method is by main winding, detects electric current, then, with designated state, the starting cut-off switch.This requires current detector to connect with main winding, and starting is inserted the assembly cost of these parts, the auxiliary winding that many manufacturers can not adopt because the cost of additional components is connected with the modification circuit and in circuit.This method is because extra wattage and heat also can not adopt, because after starting, electric current is still just flowing through the transducer in operation mode.
Summary of the invention
The present invention is in the simple and efficient especially electronic control system that is used for auxiliary winding cut-off switch, solves and explain above-mentioned problem with other that mention.The present invention is load and rate-sensitive, and is that the voltage fluctuation of AC line is insensitive.The present invention eliminates the needs of the additional components of connecting on the motor reel, in axle and motor circuit.Do not need physical modifications motor component or winding.
The invention provides the new and useful circuit and the method that are used for measuring the voltage at main motor winding place and detect the point of the zero electromagnetic wave cycle of this voltage " intersection ".In other words, detect main motor winding voltage moment from just being transformed into point negative and that vice versa.This Method and circuits is also measured the voltage at auxiliary motor winding place.By as the circuit that is used to start and restarts the device of auxiliary winding, the voltage of relatively in main winding and auxiliary winding, measuring respectively.This circuit and method also detect the point in the electromagnetic wave cycle of the electric current " intersections " zero in the auxiliary winding, and with the phase place in these current zero crosspoints with intersect when zero the window pulse of generation when principal voltage and compare.When the zero current crosspoint was dropped in the window pulse, the auxiliary winding of this expression reached proper handling speed and disconnects auxiliary winding by starting circuit.If the load on the main motor winding increases, thereby piece to motor rotor speed reduces to and is lower than a certain predetermined speed, and auxiliary winding will transform back into this circuit once more so that improve the speed of main motor winding.
As mentioned, the invention provides the improvement of 622,506 open and described circuit at U.S. patent No.4.In the circuit of that embodiment, always measure the voltage at auxiliary winding two ends.In circuit of the present invention, always measure the current zero crosspoint in the auxiliary winding.More particularly, when closure was assisted the switch of winding, the voltage of auxiliary winding was with nonsensical, because it does not comprise the information of relevant electromotor velocity or RPM.This is because measure auxiliary current under this condition.When cut-off switch, do not have electric current to flow through auxiliary winding, and do not have available current information.This is because based on available RPM information, measures auxiliary winding voltage under this condition.
Other aspects of new and useful circuit and method and advantage will be conspicuous after seeing accompanying drawing and following detailed description more to one skilled in the art.
Description of drawings
Fig. 1 schematically shows the typical environment of using the preferred embodiments of the present invention.
Fig. 2 is the schematic block diagram of example explanation according to motor start circuit of the present invention.
Fig. 3 is the detailed circuit diagram of the circuit of Fig. 2.
Fig. 4 is the sequential chart of operation of the circuit of example key diagram 2 and 3.
Fig. 5 be example explanation when relating to RPM information, another sequential chart of the operation of Fig. 2 and 3 circuit.
Embodiment
Now, at length with reference to the accompanying drawings, wherein identical number elements is represented components identical all the time, and Fig. 1 represents to be connected respectively to the main winding 1 and the auxiliary winding 2 of the AC motor of AC power supplies 3.When electrical motors arrives assign thresholds speed, disconnect the switch 5 that is connected with auxiliary winding 2 so that will assist winding 2 and power supply 3 to disconnect.Current sensing means 6 also is provided, is used for detection and measurement when winding 2 is assisted in excitation, flow through its electric current.Current sensing means 6 provides the ability of the point in the sinusoidal AC current waveform at electric current " intersection " zero point of detecting auxiliary winding 2 for circuit of the present invention.This also will be called " the current zero intersection " of auxiliary winding 2.It is more apparent that its meaning will become in detailed description after a while.
Fig. 2 represents to be generally designated as 10 control circuit, comprises principal voltage checkout gear 7, is used to detect the size of the voltage at main winding 1 two ends, and boost voltage checkout gear 8, is used to detect the size of the voltage at auxiliary winding 2 two ends.Voltage comparator device 13 is provided, responds advocate peace boost voltage detector 7 and 8 respectively, and respond the specified relationship of advocating peace between the size of assisting winding voltage.Principal voltage zero crossing device 9 is provided, and the sinusoidal AC voltage of detection main winding voltage is small-sized and main winding voltage " intersection " zero or the point of transformation polarity.11 response principal voltage zero crossing devices 9 and the generation window pulses of window pulse device.The width of the window pulse that is generated is not qualification of the present invention.Auxiliary winding current zero crossing device 12 is provided, detects the also point of " intersections " zero or transformation flow direction of the electric current that flows through auxiliary winding 2 and auxiliary winding current, as previously mentioned.Phase comparison device 14 is provided, detects the auxiliary current zero cross point relevant with the principal voltage window pulse that has generated.Voltage comparator device 13 production burst waveforms 15 and phase comparison device 14 be production burst waveform 16 also.Provide logic device 17 so that response impulse waveform 15,16 disconnects or actuating switch 5.This can disconnect respectively or reconnect by for example triac driver 18 assists winding 2 and AC power supplies 3 to realize.In fact, be switched on or switched off triac driver 18 by negative voltage, this will become apparent in detailed description after a while.
Fig. 3 represents to be used for the illustrative circuitry of schematic diagram shown in Figure 2, and uses same tag to be convenient to clear.Existence is corresponding to the various piece of the detailed circuit of various functions shown in Figure 2.For example, the final logical one 7 of schematic diagram shown in Figure 2 is corresponding to NAND door 86 shown in Figure 3.Use door 86 so that trigger triac 90 and conducting and the auxiliary winding 2 of disconnection with other circuit blocks.A pair of winding 91 and 92 is the Transformer Winding that are provided for the current sensing means of auxiliary winding 2 effectively.
With reference to figure 3, the power unit of circuit comprises the pair of transistor 55,56 that is connected to the miscellaneous part that comprises a zener diode 78,79, resistor 44 and capacitor 67 again.The voltage at main winding 1 two ends is identical with the electromotive force that passes through resistor 43, capacitor 69 and diode 77.The principal voltage of this circuit detects 7 parts and comprises other resistors 36,37,38, capacitor 64 and diode 73.The boost voltage of this circuit detects 8 parts and comprises resistor 39,40,41,42, capacitor, diode 74 and transistor 53.By using comparator 81, realize that voltage ratio is than 13.In fact, comparator 81 provide the visit other comparators 80,82,83 quartzy comparator chip, or or other integrated circuits 1/4.Especially, the input pin 6 of comparator 81 detects main winding voltage 7, and the input pin 7 of same comparator 81 detects auxiliary winding voltage 8.The output pin 1 of comparator 81 is fed in the input pin 6 of resistor 45 and NAND door 85.According to the input at input pin 5 places of door 85, at the output pin 4 places production burst waveform 15 of door 85.Its meaning will be discussed in detailed description after a while.
Now, the principal voltage zero crossing 9 of reference circuit 10 and auxiliary current zero crossing 12 parts, the voltage that will see main motor winding 1 two ends is identical with the electromotive force of the voltage at resistor 20,21 two ends of circuit shown in Figure 3.In principal voltage zero crossing 9 parts of circuit, also comprise two transistors 50,51, resistor 22 and capacitor 60.The decay part of this circuit also is provided by resistor 23,24,25,26, diode 70, transistor 52 and capacitor 61.As previously mentioned, provide another comparator 80.Its output pin 2 is fed to impulse waveform maker 11 parts of this circuit.The impulse waveform maker 11 of this circuit comprises transistor 27,46 and capacitor 68.
Auxiliary winding current zero crossing 12 parts of this circuit comprise that residue is to comparator 82,83, a plurality of resistor 28,29,30,31,32,33,34,35, a pair of capacitor 62,63 and pair of diodes 71,72.As shown, the output pin 13,14 of comparator 82,83 is fed to respectively among of input pin 2 of phase comparator door 84.The output pin 3 of phase comparator door 84 is by resistor 47, capacitor 66 and diode 75, production burst 16 on " stopping " end of this circuit.This output is fed in the input gate 8 of final gate 86.In this way, as required, use impulse waveform 15,16 to accept and disconnect triac driver 18.Resistor 48,49 and transistor 57 according to input pin 10 places of gate 86 provide the triac circuit.By using this structure, switch on and off triac driver 18 by negative voltage.See Fig. 2.
Than 13, start the initial start of the motor in the application of line voltage 3 by voltage ratio.Voltage ratio detects low auxiliary winding voltage than 13 with respect to main winding voltage, and by logical one 7, initialization triac conduction.After first conducting, continue the auxiliary winding 2 of excitation immediately by phase bit comparison 14.Voltage ratio can not be used for keeping starting state than 13, because behind the auxiliary winding 2 of first excitation, the voltage on the auxiliary winding 2 is the voltage of line voltage source 3, and not by rotor, represents electromotor velocity from the induced voltage of main winding 1.In following paragraph, illustrate by the winding current phase control and keep auxiliary excitation.
Now, with reference to figure 4, with principal voltage checkout gear 7 size of discussing in the circuit of the present invention of preview main winding voltage how, as in last figure, being expressed as sinusoidal waveform.Figure under it represents some V1, V2 and the V3 of main winding voltage intersection zero.That is, moment inverse voltage polarity point.Next illustrated example explanation generates window pulse P1, P2 and P3 by window pulse device 11 respectively at each place of these voltage zero-crossing crunodes V1, V2 and V3.When the speed " rising " of motor or when increasing, auxiliary winding current zero crossing device 12 detects the electric current that flows through auxiliary winding 2 and some I1, I2 and the I3 of auxiliary winding current " intersections " zero or transformation flow direction.Provide phase comparison device 14 so that detect auxiliary winding current zero cross point I1, I2, the I3 relevant with P3 with principal voltage window pulse P1, P2.When auxiliary current zero cross point I3 for example dropped among the window pulse P3, phase comparator 14 generates will be by the impulse waveform 16 of logic control 17 receptions and by triac driver 18.If because the load increase causes reducing electromotor velocity, need the auxiliary winding 2 of excitation again, starting resistor comparison means 13 is so that restart and the initial identical state of motor starting state.Restart starting sequence thus so that connect auxiliary winding 2.Order is to assist winding voltage 2 by detecting with respect to hanging down of main winding voltage 1, and starting resistor compares 13.This detection is used for the initial turn-on triac, after this, uses phase comparison device to keep auxiliary winding 2 and encourages again till electromotor velocity is increased to required auxiliary winding de-energisation speed.
Now,, will find out accessibility, derive the function of this circuit by the RPM information of motor with reference to figure 1 and 5.For example, when cut-off switch 5, boost voltage provides RPM information, and does not have available auxiliary current.That is, auxiliary winding voltage is actually the voltage at main winding 1 two ends and the function of motor PRM.The voltage and the motor RPM at auxiliary winding 2 two ends have direct relation.When Closing Switch 5, boost voltage is identical with line voltage and do not comprise RPM information.On the other hand, the auxiliary current zero crossing has RPM information really.This is as changing as shown in the last figure of expression switch 5 " connection " and " disconnection " position.When initial Closing Switch 5, the speed of motor " rising " is to auxiliary winding 2 point that circuit and switch 5 open that can " open circuit ".At this time durations, determine the auxiliary current zero crossing by circuit.After switch 5 was opened, the voltage that does not have electric current to flow through auxiliary winding 2 and auxiliary winding 2 two ends was the voltage at main winding 1 two ends and the function of motor RPM.When owing to force load on motor, motor continues and RPM when reducing, the speed that needs Closing Switch 5 once more so that the increase motor torque is attempted and reentried.This switch 5 closures " promotion " motor so that RPM are increased to the point of the auxiliary winding 1 of different needs excitation.This whole operation cycle at motor continues.
Therefore, new and the useful circuit and the method for the point in the electromagnetic wave cycle that has been provided for measuring the voltage at main motor winding place and detecting main winding voltage " intersection " zero.This Method and circuits is also measured the voltage at auxiliary motor winding place.The voltage of measuring in main winding and auxiliary winding is respectively by comparing with acting on starting and restarting the circuit of assisting winding.This circuit and method also detect the point in the electromagnetic wave cycle of the electric current " intersections " zero in the auxiliary winding, and with the phase place in these current zero crosspoints with intersect when zero the window pulse of generation when main winding voltage and compare.When the zero current crosspoint was dropped in the window pulse, auxiliary winding rose to proper handling speed and disconnects auxiliary winding by switching circuit.If the load on the motor increases, cause electromotor velocity to drop to and be lower than a certain level, auxiliary winding will transform back into this circuit once more so that improve the speed of main motor winding.
Scope of the present invention is electromotor velocity and/or the auxiliary winding current that comprises based on current phase variation and main winding, and winding is assisted in de-energisation.Along with the auxiliary winding of excitation, at motor starting or between deceleration period, main winding and auxiliary winding current phase place change with electromotor velocity.Disclosed circuit works in the phase shift of auxiliary winding with respect to the line voltage-phase.The main winding current phase shift that changes with electromotor velocity is in the direction opposite with being used for auxiliary current.Made logic and the variation the circuit position start with respect to line voltage the de-energisation of the auxiliary winding in the phase shift of main winding current from auxiliary winding to the current sensor of main winding.In addition,,, relatively assist the phase place of winding, start de-energisation by with respect to main winding by two current sensors.Previous detailed described circuit is based on the embodiment of the trial that minimizes the cost of realizing required control.The scope that it will be appreciated that the disclosure content and accessory claim is not limited to specific embodiment described herein.
Claims (30)
1. have the main winding and the auxiliary winding that all can be connected to AC power supplies, and having the AC motor that is used for disconnecting from described AC power supplies the switch of described auxiliary winding, a kind of improvement control circuit that is used for described switch comprises:
The principal voltage checkout gear is used to detect the size of AC main winding voltage,
Principal voltage zero cross detection device is used to detect the point of moment reversing main winding polarity of voltage,
The window pulse generating apparatus is used at the some place of reversing main winding polarity of voltage, production burst,
The boost voltage checkout gear is used to detect the size that AC assists winding voltage,
Voltage comparator device is used to detect the difference of the voltage swing between main winding and auxiliary winding,
Auxiliary current zero cross detection device is used to detect the point that auxiliary current changes the direction place, and
Phase comparison device is used to detect the phase shift between principal voltage zero cross point and auxiliary current zero cross point,
Wherein, described phase comparison device is used for when the function according to electromotor velocity, when the phase shift of auxiliary winding current zero crossing drops in the principal voltage pulse, disconnects described auxiliary winding.
2. control circuit as claimed in claim 1, wherein, described voltage comparator device is used for when the function according to motor load and electromotor velocity, size with respect to the voltage of main winding, the size of the voltage of auxiliary winding is reduced to predetermined value when following, connects or reconnects described auxiliary winding.
3. control circuit as claimed in claim 2, wherein, described voltage comparator comprises the impulse waveform generating apparatus, is used to generate first logical pulse, and described phase comparator comprises the impulse waveform generating apparatus, is used to generate second logical pulse.
4. control circuit as claimed in claim 3, wherein, described first and second logical pulses are made by logic controller and are used for switching on and off described switch.
5. control circuit as claimed in claim 4, wherein, described switch comprises the triac equipment that is triggered by negative value.
6. have the main winding and the auxiliary winding that all can be connected to AC power supplies, and having the AC motor that is used for switch that described auxiliary winding and described AC power supplies are disconnected, a kind ofly be used to control improving one's methods of described switch and comprise step:
Detect the size of AC main winding voltage,
Detect the point of moment reversing main winding polarity of voltage,
At the some place of reversing main winding polarity of voltage, production burst,
Detect the size of the auxiliary winding voltage of AC,
Detect the difference of the voltage swing between main winding and auxiliary winding,
Detect the point that auxiliary current changes the direction place, and
Detect the phase shift between principal voltage zero cross point and auxiliary current zero cross point,
Wherein, described phase shift is used for when the function according to electromotor velocity, when the phase shift of auxiliary winding current zero crossing drops in the principal voltage pulse, disconnects described auxiliary winding.
7. method as claimed in claim 6, comprise when function according to motor load and electromotor velocity, with respect to the size of the voltage of main winding, the size of the voltage of auxiliary winding is reduced to predetermined value when following, connects or reconnect the step of described auxiliary winding.
8. method as claimed in claim 7 comprises according to voltage ratio result, generates first logical pulse and according to the result of phase bit comparison, generates the step of second logical pulse.
9. method as claimed in claim 8, wherein, described first and second logical pulses are made by logic controller and are used for switching on and off described switch.
10. method as claimed in claim 9 further comprises the step that the triac equipment that is triggered by negative value is provided as switch.
11. have the main winding and the auxiliary winding that all can be connected to AC power supplies, and having the AC motor that is used for switch that described auxiliary winding is disconnected from described AC power supplies, a kind of improvement control circuit that is used for described switch comprises:
The principal voltage checkout gear is used to detect the size of AC main winding voltage,
The principal voltage phase detection device is used to be provided for the reference of the phase bit comparison of main winding current phase-detection,
The boost voltage checkout gear is used to detect the size that AC assists winding voltage,
Voltage comparator device is used to detect the difference of the voltage swing between main winding and auxiliary winding,
The auxiliary current phase detection device is used to measure the main winding phase shift, and
Phase comparison device is used to detect the phase shift between principal voltage and main winding current,
Wherein, described phase comparison device is used for when according to the function of electromotor velocity, with respect to principal voltage, when the phase shift of main winding drops in the predetermined value of phase place, disconnects described auxiliary winding.
12. control circuit as claimed in claim 11, wherein, described voltage comparator device is used for when according to the function of electromotor velocity, with respect to the size of the voltage of main winding, the size of the voltage of auxiliary winding is reduced to predetermined value when following, connects or reconnects described auxiliary winding.
13. control circuit as claimed in claim 12, wherein, described voltage comparator comprises the impulse waveform generating apparatus, is used to generate first logical pulse, and described phase comparator comprises the impulse waveform generating apparatus, is used to generate second logical pulse.
14. control circuit as claimed in claim 13, wherein, described first and second logical pulses are made by logic controller and are used for switching on and off described switch.
15. control circuit as claimed in claim 14, wherein, described switch comprises triac.
16. have the main winding and the auxiliary winding that all can be connected to AC power supplies, and having the AC motor that is used for switch that described auxiliary winding is disconnected from described AC power supplies, a kind ofly be used for improving one's methods of described switch and comprise step:
Detect the size of AC main winding voltage,
Detect the point of moment reversing main winding polarity of voltage,
At the some place of reversing main winding polarity of voltage, production burst,
Detect the size of the auxiliary winding voltage of AC,
Detect the difference of the voltage swing between main winding and auxiliary winding,
Detect the point that principal current changes direction; And
Detect the phase shift between principal voltage zero crossing and principal current zero cross point,
Wherein, described phase shift is used for when the function according to electromotor velocity, when the phase shift of main winding current zero crossing drops on outside the principal voltage pulse, disconnects described auxiliary winding.
17. method as claimed in claim 16 comprises when according to the function of electromotor velocity, with respect to the size of the voltage of main winding, the size of the voltage of auxiliary winding is reduced to predetermined value when following, connects or reconnect the step of described auxiliary winding.
18. method as claimed in claim 17 comprises according to voltage ratio result, generates first logical pulse and according to the result of phase bit comparison, generates the step of second logical pulse.
19. method as claimed in claim 8, wherein, described first and second logical pulses are made by logic controller and are used for switching on and off described switch.
20. method as claimed in claim 9 further comprises the step that the triac equipment that is triggered by negative value is provided as switch.
21. have the main winding and the auxiliary winding that all can be connected to AC power supplies, and having the AC motor that is used for switch that described auxiliary winding is disconnected from described AC power supplies, a kind of improvement control circuit that is used for described switch comprises:
The principal voltage checkout gear is used to detect the size of AC main winding voltage,
The principal voltage phase detection device is used to be provided for the reference of the phase bit comparison of auxiliary current phase-detection,
The boost voltage checkout gear is used to detect the size that AC assists winding voltage,
Voltage comparator device is used to detect the difference of the voltage swing between main winding and auxiliary winding,
The auxiliary current phase detection device is used to measure auxiliary winding phase shift, and
Phase comparison device is used to detect the phase shift between principal current and auxiliary current,
Wherein, described phase comparison device is used for when according to the function of electromotor velocity, with respect to main winding current, when the phase shift of auxiliary winding current drops in the predetermined value of phase place, disconnects described auxiliary winding.
22. control circuit as claimed in claim 21, wherein, described voltage comparator device is used for when according to the function of electromotor velocity, with respect to the size of the voltage of main winding, the size of the voltage of auxiliary winding is reduced to predetermined value when following, connects or reconnects described auxiliary winding.
23. control circuit as claimed in claim 22, wherein, described voltage comparator comprises the impulse waveform generating apparatus, is used to generate first logical pulse, and described phase comparator comprises the impulse waveform generating apparatus, is used to generate second logical pulse.
24. control circuit as claimed in claim 23, wherein, described first and second logical pulses are made by logic controller and are used for switching on and off described switch.
25. control circuit as claimed in claim 24, wherein, described switch comprises triac.
26. have the main winding and the auxiliary winding that all can be connected to AC power supplies, and having the AC motor that is used for switch that described auxiliary winding is disconnected from described AC power supplies, a kind ofly be used for improving one's methods of described switch and comprise step:
Detect the size of AC main winding voltage,
Detect the point of moment reversing main winding polarity of voltage,
At the some place of reversing main winding polarity of voltage, production burst,
Detect the size of the auxiliary winding voltage of AC,
Detect the difference of the voltage swing between main winding and auxiliary winding,
Detect the point that principal current changes direction,
Detect the point that auxiliary current changes direction, and
Detect the phase shift between principal voltage zero crossing and principal current zero cross point,
Wherein, described phase shift is used for when according to the function of electromotor velocity, and with respect to the principal current zero crossing, the phase shift of auxiliary winding current zero crossing disconnects described auxiliary winding in the given time the time.
27. method as claimed in claim 26 comprises when according to the function of electromotor velocity, with respect to the size of the voltage of main winding, the size of the voltage of auxiliary winding is reduced to predetermined value when following, connects or reconnect the step of described auxiliary winding.
28. method as claimed in claim 27 comprises according to voltage ratio result, generates first logical pulse and according to the result of phase bit comparison, generates the step of second logical pulse.
29. method as claimed in claim 28, wherein, described first and second logical pulses are made by logic controller and are used for switching on and off described switch.
30. method as claimed in claim 29 further comprises the step that the triac equipment that is triggered by negative value is provided as switch.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/US2002/033750 WO2004038906A1 (en) | 2002-10-22 | 2002-10-22 | Load and speed sensitive motor starting circuit and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1723605A true CN1723605A (en) | 2006-01-18 |
Family
ID=32173965
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA028297903A Pending CN1723605A (en) | 2002-10-22 | 2002-10-22 | Load and speed sensitive motor starting circuit and method |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP1559189A4 (en) |
| JP (1) | JP2006504379A (en) |
| CN (1) | CN1723605A (en) |
| CA (1) | CA2501432A1 (en) |
| WO (1) | WO2004038906A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103493359A (en) * | 2011-03-01 | 2014-01-01 | 惠而浦股份公司 | Method for starting a single-phase induction motor, starting device for a single-phase motor and starting system therefor |
| CN107592956A (en) * | 2015-05-12 | 2018-01-16 | 伊利诺斯工具制品有限公司 | The commercial compressor of electronic starting device with the startup for electro-motor |
| CN109209850A (en) * | 2018-09-29 | 2019-01-15 | 青岛海尔智能技术研发有限公司 | Compressor start driving circuit, driving method, device and computer storage medium |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4249120A (en) * | 1979-07-26 | 1981-02-03 | Mcgraw-Edison Co. | Variable speed induction motor control system |
| US4409532A (en) * | 1981-11-06 | 1983-10-11 | General Electric Company | Start control arrangement for split phase induction motor |
| US4622506A (en) * | 1984-12-11 | 1986-11-11 | Pt Components | Load and speed sensitive motor starting circuit |
| EP0720268A1 (en) * | 1994-12-29 | 1996-07-03 | PLUMER (Société Anonyme) | Stop control device for single-phase asynchronous motor with capacitor |
| US5559418A (en) * | 1995-05-03 | 1996-09-24 | Emerson Electric Co. | Starting device for single phase induction motor having a start capacitor |
| AU4176297A (en) * | 1997-09-02 | 1999-03-22 | Condyne Technology, Inc. | Improved single-phase induction motor safety controller |
-
2002
- 2002-10-22 CA CA002501432A patent/CA2501432A1/en not_active Abandoned
- 2002-10-22 WO PCT/US2002/033750 patent/WO2004038906A1/en active Application Filing
- 2002-10-22 CN CNA028297903A patent/CN1723605A/en active Pending
- 2002-10-22 EP EP02780513A patent/EP1559189A4/en not_active Withdrawn
- 2002-10-22 JP JP2004546637A patent/JP2006504379A/en not_active Ceased
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103493359A (en) * | 2011-03-01 | 2014-01-01 | 惠而浦股份公司 | Method for starting a single-phase induction motor, starting device for a single-phase motor and starting system therefor |
| CN103493359B (en) * | 2011-03-01 | 2017-05-17 | 惠而浦股份公司 | Method for starting a single-phase induction motor, starting device for a single-phase motor and starting system therefor |
| CN107592956A (en) * | 2015-05-12 | 2018-01-16 | 伊利诺斯工具制品有限公司 | The commercial compressor of electronic starting device with the startup for electro-motor |
| CN109209850A (en) * | 2018-09-29 | 2019-01-15 | 青岛海尔智能技术研发有限公司 | Compressor start driving circuit, driving method, device and computer storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2004038906A1 (en) | 2004-05-06 |
| JP2006504379A (en) | 2006-02-02 |
| CA2501432A1 (en) | 2004-05-06 |
| EP1559189A4 (en) | 2006-05-17 |
| EP1559189A1 (en) | 2005-08-03 |
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