CN104779880A - Energy-saving type motor control system - Google Patents
Energy-saving type motor control system Download PDFInfo
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- CN104779880A CN104779880A CN201510145480.5A CN201510145480A CN104779880A CN 104779880 A CN104779880 A CN 104779880A CN 201510145480 A CN201510145480 A CN 201510145480A CN 104779880 A CN104779880 A CN 104779880A
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Abstract
The invention discloses an energy-saving type motor control system. The system is characterized by comprising a motor (5), a control system (2), a voltage detecting device (1), a motor protecting system (3), a frequency converting control system (4), a dynamic power correcting circuit (7) and a resonance elimination device (6), wherein the voltage detecting device (1) is connected with the control system (2), the motor protecting system (3) is connected with the voltage detecting device (1), the frequency converting control system (4) and the dynamic power correcting circuit (7) are connected with the motor (5), and the resonance elimination device (6) is connected with the frequency converting control system (4); the control system (2) is connected with an external power grid, the frequency converting control system (4) sequentially passes by an amplifier P1 and a capacitor C1 and is connected with the control system (2), the motor protecting system is further connected with the motor (5), and both the resonance elimination device (6) and the dynamic power correcting circuit (7) are connected with the control system (2). The frequency converting control system is adopted to control the motor, so that the energy saving efficiency reaches 30%; meanwhile, closed-loop constant voltage control as well as soft stop and soft start of the motor can be realized.
Description
Technical field
The present invention relates to electronic applications, specifically refer to a kind of energy-saving electrical machine control system.
Background technology
At present, energy-saving and emission-reduction and environmental problem become the focus of people's growing interest, and along with national energy-saving reduces discharging the enforcement gradually of plan, industrial enterprise all reduces enterprise energy consumption in the various method of trial at each in newly-built or Reconstruction Project.Motor is the main power set of industrial enterprise, it is widely used in various operating mode, show according to related data, what in industrial enterprise, energy consumption was maximum is various motor apparatus, the electric motor amount of China accounts for the 60%-70% of national power consumption, in order to meet energy-saving and emission-reduction requirement, each enterprise manages the energy consumption reducing motor all one after another.
Traditional electrical machine energy-saving adopts return valve or open mostly/downtime adjust flux; but heavy motor frequent start-stop difficulty under power frequency state is large; the rush of current that can cause electric energy loss simultaneously and hold/shut down, has impact for useful life of motor and fail safe.Therefore, the energy consumption that how can effectively reduce motor is then that current people are badly in need of solving.
Summary of the invention
The object of the invention is to solve the defect that current motor makes energy consumption excessive, a kind of energy-saving electrical machine control system is provided.
Object of the present invention is by following technical proposals reality: a kind of energy-saving electrical machine control system, by motor, control system, the voltage check device be connected with control system, the protection system for motor be connected with voltage check device, the frequency-changing control system be connected with motor and dynamic power correcting circuit, and the harmonic elimination apparatus be connected with frequency-changing control system forms; Described control system is connected with external electrical network; frequency-changing control system is then connected with control system after electric capacity C1 through amplifier P1 in turn; protection system for motor is also believed with motor and is connected, and harmonic elimination apparatus is all connected with control system with dynamic power correcting circuit.
Further, described frequency-changing control system is by testing circuit, process chip U, one end is connected with the TRI pin of process chip U, the other end then resistance R7 of ground connection after electric capacity C4, positive pole is connected with the CONT pin of process chip U, the electric capacity C5 of minus earth, the integrating circuit be connected with testing circuit and process chip U, the reset circuit be connected with integrating circuit and process chip U, the constant-current source circuit be connected with process chip U, and the circuits for triggering be connected with constant-current source circuit form; The HTRE pin of process chip U is connected with the tie point of electric capacity C4 with resistance R7, GND pin ground connection.
Described testing circuit is by triode VT1, unidirectional thyristor D1, the electric capacity C2 that negative pole is connected with the collector electrode of triode VT1, positive pole is then connected with integrating circuit, the resistance R2 that one end is connected with the base stage of triode VT1, the other end is then connected with the positive pole of electric capacity C2, the resistance R5 that one end is connected with the collector electrode of triode VT1, the other end is then connected with the emitter of triode VT1 after resistance R3 through resistance R4 in turn forms; The base stage of described triode VT1 is connected with the tie point of resistance R4 with resistance R3, and the N pole of unidirectional thyristor D1 is connected with the base stage of triode VT1, its P pole is then connected with RE pin with the VCC pin of process chip U simultaneously, control pole is connected with the tie point of resistance R5 with resistance R4.
Described integrating circuit by amplifier P1, negative pole is connected with the output of amplifier P1, positive pole then after resistance R1 as the electric capacity C3 of signal input part, one end is connected with the normal phase input end of amplifier P1, the resistance R6 of other end ground connection forms; The inverting input of described amplifier P1 is respectively with reset circuit, resistance R1 and the tie point of electric capacity C3 and the positive pole of electric capacity C2 is connected, its output is then connected with the TRI pin of process chip U.
Described reset circuit comprises field effect transistor Q, resistance R8, resistance R9, resistance R10, diode D2, diode D3; Resistance R8 is all connected with the source electrode of field effect transistor Q with one end of resistance R9, the equal ground connection of the other end, the N pole of diode D2 is connected with the grid of field effect transistor Q, P pole ground connection, the N pole of diode D3 is connected with the grid of field effect transistor Q, P pole is then connected with the DIS pin of process chip U after resistance R10, and the drain electrode of field effect transistor Q is then connected with the inverting input of amplifier P1.
Described constant-current source circuit is by triode VT2, N pole is connected with the OUT pin of process chip U after resistance R11, the P pole then voltage stabilizing didoe D5 of ground connection after voltage stabilizing didoe D6 and resistance R15 in turn, and the resistance R12 that one end is connected with the emitter of triode VT2, the other end is then connected with the tie point of resistance R15 with voltage stabilizing didoe D6 after resistance R14 through resistance R13 in turn forms; The base stage of described triode VT2 is connected with the tie point of resistance R14 with resistance R13, collector electrode is connected with circuits for triggering, and the RE pin of process chip U is then connected with the tie point of resistance R13 with the N pole of voltage stabilizing didoe D5 and resistance R12 simultaneously.
Described circuits for triggering comprise triode VT3, diode D4, resistance R16; The N pole of diode D4 is connected with the collector electrode of triode VT3, P pole ground connection, one end of resistance R16 is connected with the collector electrode of triode VT3, other end ground connection, and the base stage of triode VT3 is connected with the OUT pin of process chip U, grounded emitter, collector electrode are connected with the collector electrode of triode VT2.
Described process chip U is NE555 integrated circuit, and field effect transistor Q is 3DJ6 technotron.
The present invention compared with prior art has the following advantages and beneficial effect:
1, the present invention adopts frequency-changing control system to control motor, makes energy-saving efficiency reach 30%.
2, the present invention can realize closed loop Isobarically Control, and the soft stop of motor, softly to open, and avoids voltge surge during power frequency startup, reduces the failure rate of motor.
3, protection system for motor of the present invention can be protected motor, avoids motor to be damaged because of overvoltage.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present invention;
Fig. 2 is frequency-changing control system electrical block diagram of the present invention.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
Embodiment
As shown in Figure 1; the present invention is by motor 5; control system 2; the voltage check device 1 be connected with control system 2; the protection system for motor 3 be connected with voltage check device 1; the frequency-changing control system 4 be connected with motor 5 and dynamic power correcting circuit 7, and the harmonic elimination apparatus 6 be connected with frequency-changing control system 4 forms.
In order to better realize object of the present invention; protection system for motor 3 is also connected with motor 5; and control system 2 is connected with external electrical network; frequency-changing control system 4 is connected with control system 2 after electric capacity C1 through amplifier P1 in turn; namely external voltage is after control system 2 exports; be delivered into frequency-changing control system 4 after being amplified by electric capacity C1 filtering and amplifier P1, controlled by frequency-changing control system 4 pairs of motors 5.In addition, harmonic elimination apparatus 6 is all connected with control system 2 with dynamic power correcting circuit 7, dynamic power correcting circuit 7 can gather the run signal of motor 5 and be transferred to control system 2, analyzed by control system 2 pairs of signals, and send corresponding instruction, make electric machine control system form closed loop like this to control, thus can further accurately control motor 5.
Wherein, voltage check device 1 can detect line voltage, as overvoltage signal detected, then signal can be flowed to protection system for motor 3, carries out overvoltage protection by protection system for motor 3 pairs of motors 5.And the harmonic wave that motor 5 produces can effectively be absorbed by harmonic elimination apparatus 6, avoid harmonic current to be returned to the power transformer of its exterior, it can reduce the harmonic content of electrical network greatly, preventing pollution electrical network.Also help the operation of custom power transformer simultaneously, reduce power consumption, improve the reliability of equipment and other electric appliance component.Frequency-changing control system 4 is inventive point place of the present invention, and under the driving of frequency-changing control system 4, motor 5 can realize different rotating speeds and moment of torsion, thus realizes the soft stop of motor, softly opens control.
As shown in Figure 2, this frequency-changing control system 4 is by testing circuit, process chip U, one end is connected with the TRI pin of process chip U, the other end then resistance R7 of ground connection after electric capacity C4, positive pole is connected with the CONT pin of process chip U, the electric capacity C5 of minus earth, the integrating circuit be connected with testing circuit and process chip U, the reset circuit be connected with integrating circuit and process chip U, the constant-current source circuit be connected with process chip U, and the circuits for triggering be connected with constant-current source circuit form.The HTRE pin of this process chip U is connected with the tie point of electric capacity C4 with resistance R7, GND pin ground connection.In order to better implement the present invention, process chip U is preferably NE555 integrated circuit, and its have many uses resistance and electric capacity of only needing minority, just can produce the pulse wave signal of the various different frequencies needed for digit circuit.
Testing circuit is wherein then by triode VT1, unidirectional thyristor D1, the electric capacity C2 that negative pole is connected with the collector electrode of triode VT1, positive pole is then connected with integrating circuit, the resistance R2 that one end is connected with the base stage of triode VT1, the other end is then connected with the positive pole of electric capacity C2, the resistance R5 that one end is connected with the collector electrode of triode VT1, the other end is then connected with the emitter of triode VT1 after resistance R3 through resistance R4 in turn forms.Simultaneously, the base stage of triode VT1 is connected with the tie point of resistance R4 with resistance R3, and the N pole of unidirectional thyristor D1 is connected with the base stage of triode VT1, its P pole is then connected with RE pin with the VCC pin of process chip U simultaneously, control pole is connected with the tie point of resistance R5 with resistance R4.
Described integrating circuit by amplifier P1, negative pole is connected with the output of amplifier P1, positive pole then after resistance R1 as the electric capacity C3 of signal input part, one end is connected with the normal phase input end of amplifier P1, the resistance R6 of other end ground connection forms.The inverting input of this amplifier P1 is respectively with reset circuit, resistance R1 and the tie point of electric capacity C3 and the positive pole of electric capacity C2 is connected, its output is then connected with the TRI pin of process chip U.
Reset circuit is as the discharge reduction switch of integrating circuit, and process chip U is controlled reset circuit by its DIS pin according to the different operating modes of motor 5, the command signal sent by reset circuit change integrating circuit again, realizes the variable frequency control of motor 5 thus.This reset circuit comprises field effect transistor Q, resistance R8, resistance R9, resistance R10, diode D2, diode D3.During connection, resistance R8 is all connected with the source electrode of field effect transistor Q with one end of resistance R9, the equal ground connection of the other end, the N pole of diode D2 is connected with the grid of field effect transistor Q, P pole ground connection, the N pole of diode D3 is connected with the grid of field effect transistor Q, P pole is then connected with the DIS pin of process chip U after resistance R10, and the drain electrode of field effect transistor Q is then connected with the inverting input of amplifier P1.This field effect transistor Q is preferably 3DJ6 technotron.
Constant-current source circuit can guarantee that system has constant electric current, it is by triode VT2, N pole is connected with the OUT pin of process chip U after resistance R11, the P pole then voltage stabilizing didoe D5 of ground connection after voltage stabilizing didoe D6 and resistance R15 in turn, and the resistance R12 that one end is connected with the emitter of triode VT2, the other end is then connected with the tie point of resistance R15 with voltage stabilizing didoe D6 after resistance R14 through resistance R13 in turn forms.The base stage of described triode VT2 is connected with the tie point of resistance R14 with resistance R13, collector electrode is connected with circuits for triggering, and the RE pin of process chip U is then connected with the tie point of resistance R13 with the N pole of voltage stabilizing didoe D5 and resistance R12 simultaneously.
Described circuits for triggering comprise triode VT3, diode D4, resistance R16.During connection, the N pole of diode D4 is connected with the collector electrode of triode VT3, P pole ground connection, one end of resistance R16 is connected with the collector electrode of triode VT3, other end ground connection, and the base stage of triode VT3 is connected with the OUT pin of process chip U, grounded emitter, collector electrode are connected with the collector electrode of triode VT2.The signal exported from circuits for triggering directly carries out variable frequency control to motor 5.
As mentioned above, just well the present invention can be realized.
Claims (9)
1. an energy-saving electrical machine control system, it is characterized in that: by motor (5), control system (2), the voltage check device (1) be connected with control system (2), the protection system for motor (3) be connected with voltage check device (1), the frequency-changing control system (4) be connected with motor (5) and dynamic power correcting circuit (7), and the harmonic elimination apparatus (6) be connected with frequency-changing control system (4) forms; Described control system (2) is connected with external electrical network; frequency-changing control system (4) is then connected with control system (2) after electric capacity C1 through amplifier P1 in turn; protection system for motor (3) is also connected with motor (5), and harmonic elimination apparatus (6) is all connected with control system (2) with dynamic power correcting circuit (7).
2. a kind of energy-saving electrical machine control system according to claim 1, it is characterized in that: described frequency-changing control system (4) is by testing circuit, process chip U, one end is connected with the TRI pin of process chip U, the other end is the resistance R7 of ground connection after electric capacity C4 then, positive pole is connected with the CONT pin of process chip U, the electric capacity C5 of minus earth, the integrating circuit be connected with testing circuit and process chip U, the reset circuit be connected with integrating circuit and process chip U, the constant-current source circuit be connected with process chip U, and the circuits for triggering to be connected with constant-current source circuit form, the HTRE pin of process chip U is connected with the tie point of electric capacity C4 with resistance R7, GND pin ground connection.
3. a kind of energy-saving electrical machine control system according to claim 2, it is characterized in that: described testing circuit is by triode VT1, unidirectional thyristor D1, the electric capacity C2 that negative pole is connected with the collector electrode of triode VT1, positive pole is then connected with integrating circuit, the resistance R2 that one end is connected with the base stage of triode VT1, the other end is then connected with the positive pole of electric capacity C2, the resistance R5 that one end is connected with the collector electrode of triode VT1, the other end is then connected with the emitter of triode VT1 after resistance R3 through resistance R4 in turn forms; The base stage of described triode VT1 is connected with the tie point of resistance R4 with resistance R3, and the N pole of unidirectional thyristor D1 is connected with the base stage of triode VT1, its P pole is then connected with RE pin with the VCC pin of process chip U simultaneously, control pole is connected with the tie point of resistance R5 with resistance R4.
4. a kind of energy-saving electrical machine control system according to claim 3, it is characterized in that: described integrating circuit is by amplifier P1, negative pole is connected with the output of amplifier P1, positive pole then after resistance R1 as the electric capacity C3 of signal input part, one end is connected with the normal phase input end of amplifier P1, the resistance R6 of other end ground connection forms; The inverting input of described amplifier P1 is respectively with reset circuit, resistance R1 and the tie point of electric capacity C3 and the positive pole of electric capacity C2 is connected, its output is then connected with the TRI pin of process chip U.
5. a kind of energy-saving electrical machine control system according to claim 4, is characterized in that: described reset circuit comprises field effect transistor Q, resistance R8, resistance R9, resistance R10, diode D2, diode D3; Resistance R8 is all connected with the source electrode of field effect transistor Q with one end of resistance R9, the equal ground connection of the other end, the N pole of diode D2 is connected with the grid of field effect transistor Q, P pole ground connection, the N pole of diode D3 is connected with the grid of field effect transistor Q, P pole is then connected with the DIS pin of process chip U after resistance R10, and the drain electrode of field effect transistor Q is then connected with the inverting input of amplifier P1.
6. a kind of energy-saving electrical machine control system according to claim 5, it is characterized in that: described constant-current source circuit is by triode VT2, N pole is connected with the OUT pin of process chip U after resistance R11, the P pole then voltage stabilizing didoe D5 of ground connection after voltage stabilizing didoe D6 and resistance R15 in turn, and the resistance R12 that one end is connected with the emitter of triode VT2, the other end is then connected with the tie point of resistance R15 with voltage stabilizing didoe D6 after resistance R14 through resistance R13 in turn forms; The base stage of described triode VT2 is connected with the tie point of resistance R14 with resistance R13, collector electrode is connected with circuits for triggering, and the RE pin of process chip U is then connected with the tie point of resistance R13 with the N pole of voltage stabilizing didoe D5 and resistance R12 simultaneously.
7. a kind of energy-saving electrical machine control system according to claim 6, is characterized in that: described circuits for triggering comprise triode VT3, diode D4, resistance R16; The N pole of diode D4 is connected with the collector electrode of triode VT3, P pole ground connection, one end of resistance R16 is connected with the collector electrode of triode VT3, other end ground connection, and the base stage of triode VT3 is connected with the OUT pin of process chip U, grounded emitter, collector electrode are connected with the collector electrode of triode VT2.
8. a kind of energy-saving electrical machine control system according to any one of claim 2 ~ 7, is characterized in that: described process chip U is NE555 integrated circuit.
9. a kind of energy-saving electrical machine control system according to any one of claim 5 ~ 7, is characterized in that: described field effect transistor Q is 3DJ6 technotron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510145480.5A CN104779880A (en) | 2015-03-30 | 2015-03-30 | Energy-saving type motor control system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510145480.5A CN104779880A (en) | 2015-03-30 | 2015-03-30 | Energy-saving type motor control system |
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| CN104779880A true CN104779880A (en) | 2015-07-15 |
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| CN201510145480.5A Pending CN104779880A (en) | 2015-03-30 | 2015-03-30 | Energy-saving type motor control system |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3965403A (en) * | 1973-08-24 | 1976-06-22 | Tokyo Shibaura Electric Co., Ltd. | Constant power control of a D.C. electric motor for handling cargoes |
| CN1265536A (en) * | 2000-02-23 | 2000-09-06 | 徐会明 | Harmonic-eliminating frequency converter for speed regulation of motor |
| JP2011036008A (en) * | 2009-07-31 | 2011-02-17 | Hitachi Automotive Systems Ltd | Motor control device and motor system equipped with the motor control device |
| CN103296961A (en) * | 2012-02-22 | 2013-09-11 | 华锐风电科技(集团)股份有限公司 | Control method and system for restraining vibration of offshore wind turbine generator set |
| CN103956952A (en) * | 2013-04-17 | 2014-07-30 | 济南田中工贸有限公司 | Vector frequency conversion controller of synchronization frequency conversion type alternating current motor |
-
2015
- 2015-03-30 CN CN201510145480.5A patent/CN104779880A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3965403A (en) * | 1973-08-24 | 1976-06-22 | Tokyo Shibaura Electric Co., Ltd. | Constant power control of a D.C. electric motor for handling cargoes |
| CN1265536A (en) * | 2000-02-23 | 2000-09-06 | 徐会明 | Harmonic-eliminating frequency converter for speed regulation of motor |
| JP2011036008A (en) * | 2009-07-31 | 2011-02-17 | Hitachi Automotive Systems Ltd | Motor control device and motor system equipped with the motor control device |
| CN103296961A (en) * | 2012-02-22 | 2013-09-11 | 华锐风电科技(集团)股份有限公司 | Control method and system for restraining vibration of offshore wind turbine generator set |
| CN103956952A (en) * | 2013-04-17 | 2014-07-30 | 济南田中工贸有限公司 | Vector frequency conversion controller of synchronization frequency conversion type alternating current motor |
Non-Patent Citations (1)
| Title |
|---|
| 辛长平: "《物业电工技能实战400例 双色版》", 1 September 2014, 中国电力出版社 * |
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Application publication date: 20150715 |
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