CN105337555A - Single-phase large-capacitance operation motor - Google Patents
Single-phase large-capacitance operation motor Download PDFInfo
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- CN105337555A CN105337555A CN201410413555.9A CN201410413555A CN105337555A CN 105337555 A CN105337555 A CN 105337555A CN 201410413555 A CN201410413555 A CN 201410413555A CN 105337555 A CN105337555 A CN 105337555A
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Abstract
The invention relates to a single-phase large-capacitance operation motor, and the motor comprises a main winding (21), an auxiliary winding (22), and a first operation capacitor (23), wherein the main winding (21) and the auxiliary winding (22) are connected in series. The first operation capacitor (23) is in parallel connection with two ends of the main winding (21), and the main winding (21) and the auxiliary winding (22) are respectively connected to two ends of a power supply (24). The capacitance C of the first operation capacitor (23) is determined by the following formula: C=C1*a, wherein a is a constant which is within the range from 3 to 7, and C1 is the capacitance of a second operation capacitor of the motor. According to the invention, the main winding (21) and the auxiliary winding (22) are connected in series, the operation capacitor (23) is in parallel connection with two ends of the main winding (21), and the capacitance C of the first operation capacitor (23) is determined by the formula, thereby enabling the capacitance of the first operation capacitor (23) to be increased. The first operation capacitor (23) also serves as a starting capacitor, thereby guaranteeing that the motor is simple in structure and the cost is low under the condition of guaranteeing the large starting torque of the motor.
Description
Technical field
The present invention relates to a kind of motor, especially a kind of single-phase bulky capacitor run motor.
Background technology
At present, single phase capacitor operating type motor needs starting torque large, then need starting capacitance amount also to want large, and it is excessive to run capacitance, motor working current will be excessive, motor cannot normally be worked even motor damage, so motor starting and operation can not use a capacitor.Under this technical contradiction, people often adopt two value capacitor motor to solve this difficult problem, but two value capacitor motor needs centrifugal switch, and centrifugal switch fault is many, and complex structure, cost are high.
Summary of the invention
Based on this, be necessary to provide a kind of structure simple and the single-phase bulky capacitor run motor that cost is low.
A kind of single-phase bulky capacitor run motor, it comprises main winding (21), auxiliary winding (22) and first runs electric capacity (23), this main winding (21) is connected with this auxiliary winding (22), this the first operation electric capacity (23) is connected in parallel on the two ends of this main winding (21), this main winding (21) and this auxiliary winding (22) are respectively used to the two ends being connected to power supply (24), this first capacitance C running electric capacity (23) is determined by following formula: C=C1*a, a is constant and span is 3 ~ 7, C1 is the capacitance that second of single phase capacitor operating type motor runs electric capacity (13).
Wherein in an embodiment, when the voltage at these single-phase bulky capacitor run motor two ends is 380V, the span of a is 3 ~ 4.
Wherein in an embodiment, when the voltage at these single-phase bulky capacitor run motor two ends is 220V, the span of a is 5 ~ 7.
Wherein in an embodiment, this main winding (21) is 1:1.2 ~ 1:1.4 with the number of turn ratio of this auxiliary winding (22).
Wherein in an embodiment, this main winding (21) is 1:1.3 with the number of turn ratio of this auxiliary winding (22).
Wherein in an embodiment, the coil of this main winding (21) is 130 circles, and the coil of this auxiliary winding (22) is 168 circles.
Wherein in an embodiment, this main winding (21) with this first run electric capacity (23) in parallel after form first node (25) and Section Point (26), this first node (25) is for being connected to one end of this power supply (24), this Section Point (26) is connected to one end of this auxiliary winding (22), and the other end of this auxiliary winding (22) is used for the other end being connected to this power supply (24).
Wherein in an embodiment, C1=120000*I/2P*F*U*COS ω, wherein, I is the electric current of this single phase capacitor operating type motor, and 2P is constant, and F is supply frequency, and U is the voltage at these single phase capacitor operating type motor two ends, and COS ω is power factor.
Above-mentioned single-phase bulky capacitor run motor, by major-minor windings in series, run Capacitance parallel connection at the two ends of main winding and run the capacitance of electric capacity and determined by above-mentioned formula, the capacitance running electric capacity is increased, this operation electric capacity is born the responsibility the role of dynamic condenser simultaneously, and then when ensureing that the starting torque of single-phase bulky capacitor run motor is larger than the starting torque of single phase capacitor operating type motor; Relative two value capacitor motor structure is simple and cost is low.
Accompanying drawing explanation
By the more specifically explanation of the preferred embodiments of the present invention shown in accompanying drawing, above-mentioned and other object of the present invention, Characteristics and advantages will become more clear.Reference numeral identical in whole accompanying drawing indicates identical part, focuses on purport of the present invention is shown.
The circuit diagram of the single-phase bulky capacitor run motor that Fig. 1 provides for embodiment.
The circuit diagram of the contrast motor of Fig. 2 used by embodiment.
Embodiment
For the ease of understanding the present invention, below with reference to relevant drawings, the present invention is described more fully.Preferred embodiment of the present invention is given in accompanying drawing.But the present invention can realize in many different forms, is not limited to embodiment described herein.On the contrary, provide the object of these embodiments be make the understanding of disclosure of the present invention more comprehensively thorough.
Refer to Fig. 1, the single-phase bulky capacitor run motor 20 that embodiment provides comprises main winding 21, auxiliary winding 22 and runs electric capacity 23.
This main winding 21 is connected with this auxiliary winding 22, and this operation electric capacity 23 is connected in parallel on the two ends of this main winding 21, and this main winding 21 and this auxiliary winding 22 are respectively used to the two ends being connected to power supply 24.Particularly, first node 25 and Section Point 26 is formed respectively after this main winding 21 is in parallel with this operation electric capacity 23, this first node 25 is for being connected to one end of this power supply 24, this Section Point 26 is connected to one end of this auxiliary winding 22, and the other end of this auxiliary winding 22 is for being connected to the other end of this power supply 24.
The capacitance C of this operation electric capacity 23 is determined by following formula: C=C1*a, and wherein, a is constant and span is 3 ~ 7.C1 is the capacitance (incorporated by reference to Fig. 2) of the operation electric capacity 13 of single phase capacitor operating type motor.Single phase capacitor operating type motor alleged by the present embodiment is the motor utilizing circuit diagram to be as shown in Figure 2 formed by connecting.This single phase capacitor operating type motor comprises the electric capacity 13 that capacitance is C1, main winding 11 and auxiliary winding 12.Wherein, C1=120000*I/2P*F*U*COS ω, wherein, I is the electric current of this single phase capacitor operating type motor, and 2P is constant, and F is supply frequency, and U is the voltage at these single phase capacitor operating type motor two ends, and COS ω is power factor.
Above-mentioned single-phase bulky capacitor run motor 20, connected by major-minor winding 21,22, operation electric capacity 23 is connected in parallel on the two ends of main winding 21 and the capacitance of operation electric capacity 23 is determined by above-mentioned formula, the capacitance running electric capacity 23 is increased, this operation electric capacity 23 is born the responsibility the role of dynamic condenser simultaneously, and then when ensureing that the starting torque of single-phase bulky capacitor run motor 20 is larger than the starting torque of single phase capacitor operating type motor, for two value capacitor motor, structure is simple and cost is low.
Below by way of illustrating that the motor 20 of embodiment is than single phase capacitor operating type motor (the calling contrast motor in the following text) superiority in performance by way of contrast.It is pointed out that for convenience of description, applicant adopts the motor 20 of self-control dynamometer machine to contrast motor and embodiment to carry out parameter measurement.Self-control dynamometer machine is exclusively used in measure the size of power plant power and the starting torque size of motor and oneself manufactures and designs.The main operational principle of self-control dynamometer machine is: from power supply input dc power, electric current produces the excitation of dynamometer machine, under tested power-equipment drags, dynamometer machine excitation magnetic force produces negative moment, inputs suitable exciting current, can produce the negative moment with the power relative equilibrium of tested power-equipment, at this moment the size of the exciting current of dynamometer machine is inputted, can represent the size of tested power-equipment shaft power, method can power scale thus, the aspect parameters such as electric motor starting moment.Be all under temperature is the environment of 35 degrees Celsius, measure gained at self-control dynamometer machine and tested motor with the parameters in following table, the change of temperature can cause parameter to change to some extent, but the contrast of not affecting parameters result.Be appreciated that in actual applications, the dynamometer machine of other type also can be adopted to carry out same condition to power-equipment under, the measurement contrast of merit.
Comparative example 1
Adopt the special capacitance-run motor of water pump (this motor can be buied from market) of 750W, 2 extremely former use voltage 220V as objective for implementation 1.The stator main winding lead-in wire of this motor is redness, and auxiliary winding lead-in wire is for yellow, and main winding, auxiliary winding is inner own through wired in series at motor casing, and its common lead is green.Redness, yellow and green totally 3 lead-in wires.
Electric capacity 13 is accessed objective for implementation 1 according to the circuit diagram of Fig. 2 and obtains contrasting motor 1, in contrast motor 1, the capacitance C1 of electric capacity 13 is 20 μ F (original capacitances), U=220V.Contrast motor 1 operates after connecting with the mains, and records contrast motor 1 operational factor as following table 1.
Electric capacity 23 is obtained the motor of the present embodiment according to the circuit diagram access objective for implementation 1 of Fig. 1, and in the motor of the present embodiment, the voltage at these single-phase bulky capacitor run motor two ends is the span of 380V, a is 3 ~ 4.In this comparative example 1, preferably, a=4, therefore, the capacitance C of electric capacity 23 is 20*4=80 μ F, that is to say 4 times of electric capacity 13 capacitance.The motor 20 of the present embodiment connect with the mains after running, record the present embodiment motor 20 operational factor as following table 1:
Table 1
The project name of upper table 1 is described as follows:
Voltage: the voltage at motor two ends;
Electric current 1: motor input current;
Apparent power: motor consumes visual power;
Electric current 2: during motor load, the exciting current of dynamometer machine;
Efficiency compares: dynamometer machine often inputs 1A DC excitation electric current, consume the ratio of electric electromechanics power;
Actual measurement rotating speed: the rotating speed of surveying during motor full load;
Capacitance: capacitance (comprising capacitance during starting) required during motor running;
Electric current 3: before motor unstart, first inputs a certain amount of exciting current to dynamometer machine, then starting motor, the exciting current of the limited maximum input that electronic function is started.Electric current 3 is larger, and the starting torque representing motor is larger.
It is to be noted, this objective for implementation 1 is that water pump is special, and main winding and auxiliary winding are connected in inside, cannot change motor steering in external terminal, so the direction of rotation of contrast motor 1 is contrary with the present embodiment motor 20 direction of rotation, but parameter measurement of this comparative example of not overslaugh 1.
Comparative example 2
Adopt the capacitor start capacitance operation diadic motor (this motor can be buied from market) of 1.5KW, 2 extremely former use 220V voltage as objective for implementation 2.The stator main winding lead-in wire of this motor is 2 red line, and auxiliary winding lead-in wire is 2 black lines, and it is 2 yellow line that centrifugal switch controls lead-in wire, has 6 lead-in wires.Because the present invention does not need centrifugal switch, so 2 yellow line and starting capacitance do not need place in circuit.
Electric capacity 13 is accessed objective for implementation 2 according to the circuit diagram of Fig. 2 and obtains contrasting motor 2, in contrast motor 2, the capacitance C1=35 μ F (original capacitance) of electric capacity 13, U=220V.Contrast motor 2 operates after connecting with the mains, and records contrast motor 2 operational factor as following table 2.
Electric capacity 23 is obtained the motor 20 of the present embodiment according to the circuit diagram access objective for implementation 2 of Fig. 1, and in the motor 20 of the present embodiment, the voltage at these single-phase bulky capacitor run motor two ends is the span of 380V, a is 3 ~ 4.In this comparative example 2, preferably, a=3.8, therefore, the capacitance C=35*3.8=135 μ F of electric capacity 23, that is to say 3.8 times of electric capacity 13 capacitance.The motor of the present embodiment connect with the mains after running, record motor 20 operational factor as the present embodiment of following table 2.
Table 2
The project name of upper table 2 illustrates the project name explanation please joining table 1.
As can be seen from above comparative example 1 and 2, the apparent power of the motor 20 of the present embodiment, efficiency when surveys the operational factors such as rotating speed and the apparent power contrasting motor, efficiency when surveys the operational factors such as rotating speed close to identical, particularly on actual measurement rotating speed, motor 20 comparison of the present embodiment is larger than motor, and electric current 3 comparison of the motor 20 of the present embodiment is than the electric current 3 even several times more than 60% greatly of motor, this shows that the starting torque of the motor 20 of the present embodiment increases, performance is better than contrasting motor, motor 20 smooth running and the noise of the present embodiment of the electric capacity of the large operation of employing simultaneously are low.
Comparative example 3
The single-phase bulky capacitor run motor of applicant oneself design 1.2KW, 2 poles, use 220V power supply.Designing parameters is described as follows: complete machine shell, stator core, rotor are all adopt 1.5KW two value capacitor motor original-pack, and stator winding is all changed.Number of stator slots 24 groove, major-minor umber of turn ratio is 1:1.2 ~ 1:1.4, in this comparative example 3, preferably, major-minor umber of turn ratio is 1:1.3, main winding 130 circle coil, auxiliary winding 168 circle coil, and the main winding contrasting motor 2 (1.5KW, 2 pole 220V voltage two value capacitor motors) is 240 circles, auxiliary winding is 236 circles, turn ratio is about 1:1, and main winding and auxiliary winding total number of turns (476 circle) is greater than self-designed single-phase bulky capacitor run motor total number of turns (298 circle).The winding wiring method of the single-phase bulky capacitor run motor of the present embodiment is with the wiring method with 1.5KW, 2 pole 220V voltage two value capacitor motors.Use line wire diameter: main winding 0.85 square millimeter 2, two-wire coiling, auxiliary winding 0.85 square millimeter 1,1 square millimeter of 1 two-wire coiling.The circuit connecting method of the motor 20 of the present embodiment is as Fig. 1, and main winding 21 is connected with auxiliary winding 22, and run electric capacity 23 and be connected in parallel on main winding 21 two ends, one end of main winding 21 and one end of auxiliary winding 22 are connected to 220V power line two ends.Because the voltage at these single-phase bulky capacitor run motor two ends is 220V, therefore the span of a is 5 ~ 7, in this comparative example 3, preferably, and a=5.7.Therefore the capacitance C=35*5.7=200 μ F of electric capacity 23, be 5.7 times of electric capacity C13 capacitance.The motor 20 of the present embodiment connect with the mains after running, record motor 20 operational factor as the present embodiment of following table 3.
Table 3
| Project name | The present embodiment motor | Contrast motor 2 |
| Voltage (U) | 220V | 220V |
| Electric current 1 (I) | 7.9A | 9.58A |
| Apparent power | 1738W | 2107W |
| Electric current 2 | 1.96A | 2.27A |
| Efficiency ratio | 886W/A | 928W/A |
| Actual measurement rotating speed | 2880 revs/min | 2840 revs/min |
| Run electric capacity | 200μF | 35μF |
| Electric current 3 | 0.7A | 0.2A |
From upper table 3, the actual measurement rotating speed of the actual measurement rotating ratio contrast motor 2 of the motor 20 of the present embodiment is high, and larger than the electric current 3 of motor more than two times of electric current 3 comparison of the motor of the present embodiment, this shows that the starting torque of the motor 20 of the present embodiment increases, performance is better than contrasting motor, and motor 20 smooth running and the noise of the present embodiment of the electric capacity of the large operation of employing simultaneously are low.Meanwhile, in this comparative example 3, the motor 20 of the present embodiment adopts the supply voltage of 220V, makes the range of application of the motor 20 of the present embodiment more extensive.
Can be found out by above 3 comparative examples, implementing the technical program has 2 kinds of technological means (method) feasible.The first technological means: increase the capacitance running electric capacity, increase supply voltage simultaneously, illustrates this point by comparative example 1 and 2.The second technological means: increase the capacitance running electric capacity, do not increase supply voltage, then reduce major-minor winding total number of turns, by comparative example 3, this point be described.
The above embodiment only have expressed embodiments of the invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with claims.
Claims (8)
1. a single-phase bulky capacitor run motor, it is characterized in that, it comprises main winding (21), auxiliary winding (22) and first runs electric capacity (23), this main winding (21) is connected with this auxiliary winding (22), this the first operation electric capacity (23) is connected in parallel on the two ends of this main winding (21), this main winding (21) and this auxiliary winding (22) are respectively used to the two ends being connected to power supply (24), this first capacitance C running electric capacity (23) is determined by following formula: C=C1*a, a is constant and span is 3 ~ 7, C1 is the capacitance that second of single phase capacitor operating type motor runs electric capacity (13).
2. single-phase bulky capacitor run motor according to claim 1, is characterized in that, when the voltage at these single-phase bulky capacitor run motor two ends is 380V, the span of a is 3 ~ 4.
3. single-phase bulky capacitor run motor according to claim 1, is characterized in that, when the voltage at these single-phase bulky capacitor run motor two ends is 220V, the span of a is 5 ~ 7.
4. single-phase bulky capacitor run motor according to claim 3, is characterized in that, this main winding (21) is 1:1.2 ~ 1:1.4 with the number of turn ratio of this auxiliary winding (22).
5. single-phase bulky capacitor run motor according to claim 3, is characterized in that, this main winding (21) is 1:1.3 with the number of turn ratio of this auxiliary winding (22).
6. single-phase bulky capacitor run motor according to claim 3, is characterized in that, the coil of this main winding (21) is 130 circles, and the coil of this auxiliary winding (22) is 168 circles.
7. single-phase bulky capacitor run motor according to claim 1, it is characterized in that, this main winding (21) with this first run electric capacity (23) in parallel after form first node (25) and Section Point (26), this first node (25) is for being connected to one end of this power supply (24), this Section Point (26) is connected to one end of this auxiliary winding (22), and the other end of this auxiliary winding (22) is used for the other end being connected to this power supply (24).
8. single-phase bulky capacitor run motor according to claim 1, it is characterized in that, C1=120000*I/2P*F*U*COS ω, wherein, I is the electric current of this single phase capacitor operating type motor, and 2P is constant, and F is supply frequency, U is the voltage at these single phase capacitor operating type motor two ends, and COS ω is power factor.
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| CN201410413555.9A CN105337555B (en) | 2014-08-11 | 2014-08-20 | Single-phase bulky capacitor operation of electrically driven machine |
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| CN201410393453 | 2014-08-11 | ||
| CN2014103934535 | 2014-08-11 | ||
| CN201410413555.9A CN105337555B (en) | 2014-08-11 | 2014-08-20 | Single-phase bulky capacitor operation of electrically driven machine |
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| CN105337555B CN105337555B (en) | 2019-02-01 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105634226A (en) * | 2016-03-02 | 2016-06-01 | 江门日野电机有限公司 | Single-phase capacitor motor, capacitor device and driven oil pump and gate |
| CN107017748A (en) * | 2017-05-24 | 2017-08-04 | 福安市伊莱特电机有限公司 | Monophase machine |
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| US20020113565A1 (en) * | 2000-12-27 | 2002-08-22 | Lg Electronics Inc. | Coil winding number variable type motor and coil winding number varying method for varying cooling and heating capacity of reciprocating compressor |
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| CN102780344A (en) * | 2012-08-17 | 2012-11-14 | 张湘明 | Single-phase capacitor running asynchronous motor |
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2014
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20020113565A1 (en) * | 2000-12-27 | 2002-08-22 | Lg Electronics Inc. | Coil winding number variable type motor and coil winding number varying method for varying cooling and heating capacity of reciprocating compressor |
| US20050237022A1 (en) * | 2004-04-24 | 2005-10-27 | Lg Electronics Inc. | Variable speed motor |
| CN102780344A (en) * | 2012-08-17 | 2012-11-14 | 张湘明 | Single-phase capacitor running asynchronous motor |
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| 沈明元: "电容运转电动机电容量的选取", 《电工技术》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105634226A (en) * | 2016-03-02 | 2016-06-01 | 江门日野电机有限公司 | Single-phase capacitor motor, capacitor device and driven oil pump and gate |
| CN107017748A (en) * | 2017-05-24 | 2017-08-04 | 福安市伊莱特电机有限公司 | Monophase machine |
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