CN2244788Y - Soft control energy-saver for motor running - Google Patents
Soft control energy-saver for motor running Download PDFInfo
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- CN2244788Y CN2244788Y CN 95227706 CN95227706U CN2244788Y CN 2244788 Y CN2244788 Y CN 2244788Y CN 95227706 CN95227706 CN 95227706 CN 95227706 U CN95227706 U CN 95227706U CN 2244788 Y CN2244788 Y CN 2244788Y
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Abstract
The utility model relates to a soft control energy saver for motor operating, composed of a controllable silicon main loop, a power supply circuit, a current detection circuit, a voltage synchronous circuit, a phase judging and amplifying circuit, and a phase shifting trigger circuit. An inner delta connection is composed of three pieces of bidirectional controllable silicon and the three-phase stator winding of a motor. The utility model which has the advantages of simple structure, low cost, and obvious power saving effect can be used for three-phase asynchronous motors of 5-7.5KW and 10-17KW. The utility model also has obvious power saving effect within the load range of 0-75%, and the utility model has power saving rate of 8-28% of active power and 13-53% of reactive power, in different load.
Description
The utility model relates to a kind of motor and moves soft control energy-saving appliance.
At present, a kind of motor energy saving devices is arranged, its major loop is to adopt the input of bidirectional triode thyristor element connected in series at motor, belongs to outer delta connection, and it requires height to the current class of bidirectional triode thyristor, and circuit is also complicated.
The purpose of this utility model is at above-mentioned shortcoming of the prior art, and provides a kind of simple in structure, Remarkable Energy Saving motor to move soft control energy-saving appliance.
The purpose of this utility model is achieved in that
A kind of motor moves soft control energy-saving appliance, it is by the controllable silicon major loop, power circuit, current detection circuit, the voltage synchronous circuit, phase place is judged and amplifying circuit, phase-shift trigger circuit is formed, delta connection in the threephase stator winding of three bidirectional triode thyristors and motor constitutes, be every phase stator winding and be connected into triangle again after a controllable silicon is connected in series, controllable silicon is connected to △ inside, the output of current detection circuit and voltage synchronous circuit connects the input of phase place judgement and amplifying circuit, the output of phase place judgement and amplifying circuit connects the input of phase-shift trigger circuit, the output of phase-shift trigger circuit connects the silicon controlled trigger electrode, and another road input of phase-shift trigger circuit and the input of voltage synchronous circuit connect synchrotrans secondary of power circuit.
The course of work of the present utility model is as follows:
Produce a voltage signal by the voltage synchronous circuit, produce a current signal by current detection circuit, voltage signal and current signal are delivered to phase place judgement and amplifying circuit simultaneously, phase place is judged and amplifying circuit produces one and the directly proportional control voltage of phase place, this voltage signal is sent to phase-shift trigger circuit and removes to control the silicon controlled angle of flow and move, just reached variation, regulated the purpose of its input voltage automatically according to the motor load rate.
Below in conjunction with drawings and Examples the utility model is further described:
Fig. 1 is a theory diagram of the present utility model.
Fig. 2 is circuit theory diagrams of the present utility model.
By Fig. 1,2 as can be known, a kind of motor moves soft control energy-saving appliance, it is by the controllable silicon major loop, power circuit, current detection circuit, the voltage synchronous circuit, phase place is judged and amplifying circuit, phase-shift trigger circuit is formed, delta connection in the threephase stator winding of three bidirectional triode thyristors and motor constitutes, be every phase stator winding and be connected into triangle again after a controllable silicon is connected in series, controllable silicon is connected to △ inside, the output of current detection circuit and voltage synchronous circuit connects the input of phase place judgement and amplifying circuit, the output of phase place judgement and amplifying circuit connects the input of phase-shift trigger circuit, the output of phase-shift trigger circuit connects the silicon controlled trigger electrode, and another road input of phase-shift trigger circuit and the input of voltage synchronous circuit connect synchrotrans secondary of power circuit.
Current detection circuit is by current transformer B
2, diode D
10, D
12, resistance R
5, R
10, R
43Form B
2Be connected on the motor windings R
43With B
2In parallel.
The voltage synchronous circuit is by potentiometer W
1, resistance R
3, capacitor C
5, diode D
8, D
9Form W
1, R
3, C
5Form rc phase shifter circuit, the secondary+a of the synchrotrans of the input termination power circuit of rc phase shifter circuit ,-a.
Phase place judgement and amplifying circuit are by transistor BG
1-BG
4, resistance R
4-R
16, potentiometer W
2, capacitor C
6-C
9, diode D
11, D
13Form BG
1With R
4-R
6, D
11Form one-level amplifying circuit, R
7, R
8, C
7Form integrating circuit, BG
2-BG
4With R
9-R
16, C
7-C
9, W
2, D
13Form three grades of dc amplification circuits, the output of rc phase shifter circuit is through D
8, D
9After the full-wave rectification again through R
4Meet BG
1Base stage, current transformer B
2An end T
1Through D
10, R
5Meet BG
1Base stage, BG
1Collector electrode meet the R of integrating circuit
7, the output of integrating circuit is through R
8Meet BG
2Base stage, current transformer B
2An end T
1Through D
10, D
12, R
10Meet BG
2Base stage, BG
4Collector electrode output through R
15Connect phase-shift trigger circuit.
Phase-shift trigger circuit is made up of three tunnel identical circuit, and they include synchronously negative sawtooth-wave circuit, amplifying circuit, pulse transformer and oscillating circuit, and the synchronously negative sawtooth-wave circuit of A phase phase-shift trigger circuit is by diode D
14-D
16, resistance R
20, R
2 1, capacitor C
11Form, amplifying circuit is by transistor BG
5-BG
7, resistance R
17, R
22-R
25, diode D
17Form, oscillating circuit is by transistor BG
14, BG
15, resistance R
38-R
42, capacitor C
14, C
15, transformer B
6Form D
14, D
15Anodal parallel connection after lead up to D
16, R
22Meet BG
5Base stage, R is passed through on another road
20Meet+12V D14, D
15Negative pole meet synchrotrans B respectively
1Secondary+a ,-a, C
11A termination BG
5Emitter, C
11The other end lead up to R
22Meet BG
5Base stage, R is passed through on another road
21Meet 16V, the output BG of phase place judgement and amplifying circuit
4Collector electrode through R
15, R
17Meet BG
5Base stage, pulse transformer B
3The elementary BG that is serially connected in
7Collector electrode, the output BG of oscillating circuit
15Collector electrode meet BG
7Emitter, B is mutually mutually identical with A with the structure of the phase-shift trigger circuit of C phase.
The frequency of oscillation of oscillating circuit is 10KHz.
Power circuit is by synchrotrans B
1, rectifier diode D
1-D
7, filter capacitor C
1-C
4, resistance R
1, R
2, voltage stabilizing didoe WD
1, WD
2To form, power circuit provides ± 16V ,+the 12V power supply.
Because the main circuit of this energy-saving appliance adopts interior delta connection, reduced the volume of energy-saving appliance, simplified circuits for triggering.Concrete connection is three-phase △ to be met three of motor take down in flakes, and with three bidirectional triode thyristors replacements, controllable silicon is connected to △ inside, so be called interior delta connection.This connection flows through the silicon controlled electric current to be had only with respect to outer delta connection
Help using less thyristor like this.For example, the 7.5KW motor, its rated current is about 15A, and uses interior delta connection, and motor is under the rated power situation, and the electric current that flows through is less than 8.65A.
The phase-shift trigger circuit of this energy-saving appliance is controlled by an oscillating circuit, so that produce the trigger impulse row, purpose is when preventing that motor operating state from changing rapidly and since the current of electric zero crossing rapidly after move, behind current over-zero, phenomenon that the what is called that no longer includes pulse " is lost pulse, stall ".In the time of can guaranteeing the motor running condition sudden change, controllable silicon can reliably trigger.
Below in conjunction with Fig. 2 operation principle of the present utility model is described:
After the A.C. contactor closure of control motor, energy-saving appliance is worked immediately, and controllable silicon is in fully conducting state.The silicon controlled trigger impulse is continual spike train, and in playing process, controllable silicon is powered to motor in whole power frequency period incessantly, the motor direct-on-line starting.At this moment the current transformer B by going here and there in motor windings
2Take out current signal, this signal is through D
10After the halfwave rectifier again through R
5Be connected to BG
1Base stage.By W
1, R
3, C
5The rc phase shifter circuit of forming is selsyn transformer B in the future
1Secondary+a ,-synchronizing voltage of a end is through phase shift and D
8, D
9After the full-wave rectification again through R
4With from current transformer B
1Current signal stack after be added on BG
1Base stage, BG
1Amplify rectangular pulse of output, its width changes with motor power factor, the constant supply voltage that equals of its amplitude.This signal is through R
7, C
6, R
8The integrating circuit of forming export one with load weight, the strong and weak continuous voltage signal that changes of amplitude, this voltage signal and from D
12, R
10Current signal stack after act on BG
2Base stage, through BG
2-BG
4Amplify direct voltage that changes with motor load of output and be connected to R
17, R
18, R
19And as regulation voltage.
The operation principle of phase-shift trigger circuit is that example is described as follows with A mutually: come selsyn transformer B
1Secondary+a ,-synchronizing voltage of a end is via D
14-D
16, C
11, R
20, R
21The synchronously negative sawtooth-wave circuit of forming produces 100 synchronously negative sawtooth waveforms, resistance R
20Effect be in order to prevent D
14, D
15Zero-crossing switching.Synchronously negative sawtooth waveforms and from R
17The straight polarity regulation voltage stack that changes with motor load after be added on BG
5Base stage, through BG
5-BG
7After the amplification again through pulse transformer B
3The secondary SCR that is added to
1Trigger electrode.The phase place of trigger impulse is relevant with the height of straight polarity regulation voltage, and along with the height variation of straight polarity regulation voltage, trigger impulse moves forward and backward, and the terminal voltage of motor windings rises or descends.Voltage when load strengthens on the motor can rise automatically, and voltage can descend automatically when load alleviated.In motor windings voltage decline process, the power factor of motor rises.This process proceeds to a stable state, and the phase place of trigger impulse is no longer mobile, enters the power-saving running state.Guarantee electric moter voltage and its power output coupling, reach both saves energy, guarantee the motor power output again.
By BG
14, BG
15, B
6The spike train that the 10KHz oscillating circuit of forming is produced acts on BG
7Emitter, be BG
7Current path is provided.
Among Fig. 2, D
1-D
6Binding post for motor.
The utility model has the advantages that simple in structurely, with low cost, power savings is remarkable.Be widely used in 5-7.5KW, 10-17KW threephase asynchronous, tangible power savings is all arranged in the 0-75% loading range.Under the different loads situation, meritorious power saving rate is 8-28%, and idle power saving rate is 13-53%.
Claims (7)
1, a kind of motor moves soft control energy-saving appliance, it is characterized in that it is by the controllable silicon major loop, power circuit, current detection circuit, the voltage synchronous circuit, phase place is judged and amplifying circuit, phase-shift trigger circuit is formed, delta connection in the threephase stator winding of three bidirectional triode thyristors and motor constitutes, be every phase stator winding and be connected into triangle again after a controllable silicon is connected in series, controllable silicon is connected to △ inside, the output of current detection circuit and voltage synchronous circuit connects the input of phase place judgement and amplifying circuit, the output of phase place judgement and amplifying circuit connects the input of phase-shift trigger circuit, the output of phase-shift trigger circuit connects the silicon controlled trigger electrode, and another road input of phase-shift trigger circuit and the input of voltage synchronous circuit connect synchrotrans secondary of power circuit.
2, energy-saving appliance according to claim 1 is characterized in that current detection circuit is by current transformer B
2, diode D
10, D
12, resistance R
5, R
10, R
43Form B
2Be connected on the motor windings R
43With B
2In parallel.
3, energy-saving appliance according to claim 2 is characterized in that the voltage synchronous circuit is by potentiometer W
1, resistance R
3, capacitor C
5, diode D
8, D
9Form W
1, R
3, C
5Form rc phase shifter circuit, the secondary+a of the synchrotrans of the input termination power circuit of rc phase shifter circuit ,-a.
4, energy-saving appliance according to claim 3 is characterized in that phase place judgement and amplifying circuit are by transistor BG
1-BG
4, resistance R
4-R
16, potentiometer W
2, capacitor C
6-C
9, diode D
11, D
13Form BG
1With R
4-R
6, D
11Form one-level amplifying circuit, R
7, R
8, C
7Form integrating circuit, BG
2-BG
4With R
9-R
16, C
7-C
9, W
2, D
13Form three grades of dc amplification circuits, the output of rc phase shifter circuit is through D
8, D
9After the full-wave rectification again through R
4Meet BG
1Base stage, current transformer B
2An end T
1Through D
10, R
5Meet BG
1Base stage, BG
1Collector electrode meet the R of integrating circuit
7, the output of integrating circuit is through R
8Meet BG
2Base stage, current transformer B
2An end T
1Through D
10, D
12, R
10Meet BG
2Base stage, BG
4Collector electrode output through R
15Connect phase-shift trigger circuit.
5, energy-saving appliance according to claim 4, it is characterized in that phase-shift trigger circuit is made up of three tunnel identical circuit, they include synchronously negative sawtooth-wave circuit, amplifying circuit, pulse transformer and oscillating circuit, and the synchronously negative sawtooth-wave circuit of A phase phase-shift trigger circuit is by diode D
14-D
16, resistance R
20, R
21, capacitor C
11Form, amplifying circuit is by transistor BG
5-BG
7, resistance R
17, R
22-R
25, diode D
17Form, oscillating circuit is by transistor BG
14, BG
15, resistance R
38-R
42, capacitor C
14, C
15, transformer B
6Form D
14, D
15Anodal parallel connection after lead up to D
16, R
22Meet BG
5Base stage, R is passed through on another road
20Meet+12V D
14, D
15Negative pole meet synchrotrans B respectively
1Secondary+a ,-a, C
11A termination BG
5Emitter, C
11The other end lead up to R
22Meet BG
5Base stage, R is passed through on another road
21Meet 16V, the output BG of phase place judgement and amplifying circuit
4Collector electrode through R
1 5, R
17Meet BG
5Base stage, pulse transformer B
3The elementary BG that is serially connected in
7Collector electrode, the output BG of oscillating circuit
15Collector electrode meet BG
7Emitter, B is mutually mutually identical with A with the structure of the phase-shift trigger circuit of C phase.
6, energy-saving appliance according to claim 5, the frequency of oscillation that it is characterized in that oscillating circuit is 10KHz.
7, energy-saving appliance according to claim 6 is characterized in that power circuit is by synchrotrans B
1, rectifier diode D
1-D
7, filter capacitor C
1-C
4, resistance R
1, R
2, voltage stabilizing didoe WD
1, WD
2To form, power circuit provides ± 16V ,+the 12V power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95227706 CN2244788Y (en) | 1995-12-06 | 1995-12-06 | Soft control energy-saver for motor running |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95227706 CN2244788Y (en) | 1995-12-06 | 1995-12-06 | Soft control energy-saver for motor running |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2244788Y true CN2244788Y (en) | 1997-01-08 |
Family
ID=33873479
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95227706 Expired - Fee Related CN2244788Y (en) | 1995-12-06 | 1995-12-06 | Soft control energy-saver for motor running |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2244788Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102346211A (en) * | 2010-08-03 | 2012-02-08 | 致茂电子(苏州)有限公司 | Alternating-current (ac) real current detection apparatus and detection method thereof |
| CN107276485A (en) * | 2017-08-14 | 2017-10-20 | 高玉琴 | A kind of electricity-saving device for three-phase |
-
1995
- 1995-12-06 CN CN 95227706 patent/CN2244788Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102346211A (en) * | 2010-08-03 | 2012-02-08 | 致茂电子(苏州)有限公司 | Alternating-current (ac) real current detection apparatus and detection method thereof |
| CN102346211B (en) * | 2010-08-03 | 2014-02-12 | 致茂电子(苏州)有限公司 | Alternating-current (AC) real current detection apparatus and detection method thereof |
| CN107276485A (en) * | 2017-08-14 | 2017-10-20 | 高玉琴 | A kind of electricity-saving device for three-phase |
| CN107276485B (en) * | 2017-08-14 | 2023-08-25 | 高玉琴 | Electricity-saving device for three-phase motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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 |