CN2540701Y - Electric saving machine for motor - Google Patents
Electric saving machine for motor Download PDFInfo
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- CN2540701Y CN2540701Y CN01242985U CN01242985U CN2540701Y CN 2540701 Y CN2540701 Y CN 2540701Y CN 01242985 U CN01242985 U CN 01242985U CN 01242985 U CN01242985 U CN 01242985U CN 2540701 Y CN2540701 Y CN 2540701Y
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Abstract
Provided is an electricity saving equipment of a motor, comprising a conversion device converting between light load and heavy load, a short-circuit protector, an over-current protector, a light load operating device, a heavy load operating device, a phase advancing controller, an inrush current limiter, a phase advancer, an over-voltage protector and a residual pressure releaser. The conversion device converting positioned between light load and heavy load is connected with the input ends of the over-current protector, the over-voltage protector and the phase advancing controller via the short-circuit protector, the input ends of the light load operating device and the heavy load operating device are joined up in parallel and then connected with the output end of the over-current protector, and the output ends of the light load operating device and the heavy load operating device are joined up in parallel and then connected with the motor.
Description
The utility model belongs to a kind of province's motor that is applied to alternating current motor.
At present, no matter at home or abroad, in industrial and mining enterprises, use alternating current motor (motor) in a large number, drag to be used as power.The synchronous speed of alternating current motor is decided by supply frequency.Supply frequency is once determining that its asynchronous speed for certain number of pole-pairs motor, has also just been determined.And power output that is to say with rotation speed change, is constant for the power output of a certain set rotating speed motor to same load.In the real process of motor operations, under many situations, and do not require the invariable power of motor output.People always post with hope, can reduce its power output when underloading, to save the energy.In fact, also need not big power output when underloading, for example, in sawmill, when not sawmilling, motor just drags Flywheel disc idle running, for saving the energy, requires this moment motor to reduce power output.In brick field or stone field, when rubble not or when cutting the base brick, motor only spurs the conveyer belt rotation, wastes many energy, requires this moment motor to reduce power output.In the waterworks, when pipeline hydraulic pressure reaches certain pressure, also require motor to reduce its power output, save the energy on the one hand, prevent that on the other hand pipeline is owing to high pressure damages.
For realizing this purpose, engineers and technicians have carried out arduous and fruitful research for a long time.Though it is simple in structure, easy to operate and cheap for asynchronous ac motor, for industrial and mining enterprises adopt in a large number, adjust its rotating speed, to adapt to various loads and operating mode, is very difficult.Though the past number of research projects obtains effect, and unsatisfactory.At present, the most fruitfully frequency modulation machine will have been calculated.Though the stepless speed control of frequency modulation machine energy, the meritorious output of reduction, but for realizing the transformation of energy cycle, must make the energy convert direct current to through silicon rectifier device, and be reverse into low-frequency AC power, twice energy conversion of different nature from DC power supply from the alternating current of 50 cycles.The energy is changed at every turn, must bring considerable energy loss.Like this, the actual power of saving is also imperfect, and only is to reduce power output, can not accomplish really energy-conservation under same rotating speed.Adopt frequency modulation machine many thorny problems of also emerging: because silicon rectifier, make power supply produce high order harmonic component, electrical network is produced pollute, all electric equipments in the harm electrical network, also radio is produced and disturb, influence the accuracy that Thermal Meter, communication apparatus, medicine equipment, control panel etc. are measured control.Another shortcoming is that cost is high, maintenance management is inconvenient, fault is many, and this suppresses the application of frequency modulation machine greatly.
The purpose of this utility model is to provide a kind of motor to economize motor.
The utility model comprises gently-heavily loaded conversion equipment, short-circuit protector, overcurrent protector, light running device, heavy service device, phase modulation control device, the limiter that shoves, phase advancer, advance to indicate mutually discharger and residual voltage release.Flow into the three-phase alternating current of weight idling changing device, become at output: one tunnel capacity current with 90 ° of phase angles of three-phase leading voltage flows into the leading phase operation device, and another road is selected to flow into motor through heavy service device or light running device with the operation total current that three-phase lags behind voltage Ф phase angle according to light, heavily loaded load current control signal.
Weight carries the input of device output termination short-circuit protector; the output of short-circuit protector and overvoltage protection device input; three devices such as overcurrent protector input and phase modulation control device input connect; the input of light running device and heavy service device two devices and connect the back be connected with the output of overcurrent protector; the light running device is connected with motor with heavy service device output and after connecing; the limiter input that shoves is connected the output of the limiter that shoves and phase advancer input with the output of phase modulation control device; advance to indicate mutually three devices such as discharger input and residual voltage release input to connect.
The utlity model has following characteristics:
(1) idling of realization weight is changed
When the motor heavy service, because light-heavily loaded conversion equipment function, the heavy service device puts into operation, and the light running device cuts out operation, motor output this moment rated power.
Be lower than 40% nominal load when following in motor load, light-heavily loaded conversion equipment automatically switches to the light running state, and at this moment, the light running device is devoted oneself to work, and the heavy service device quits work, and motor reduces power output.
(2) significantly energy-conservation in the motor entire work process
Motor is when light running, because the function of light-heavily loaded device, motor is positioned at the operation of light running device, and output is meritorious to be reduced.The amplitude that experiment showed, the active power minimizing is bigger, can be up to 60%.For example, the disintegrating machine of big stone surrounded by mountains field 30KW, when motor only spurs conveyer belt idle running and during broken stone, consumes meritorious 8.8KW, when being positioned at the operation of light running device, meritorious consumption has only 3.6KW, falls 5.2KW.
When motor was in the operation of light running device, phase voltage reduced to 57.7%, and exciting curent IB is reduced to 33.3%.Because the motor exciting curent reduces, power factor improves, and efficient also improves.
The utility model is economized motor returning apparatus phase advancer, 90 ° of appropriate leading voltages is provided synchronously on the spot for motor.The capacity current at phase angle makes the inductive circuit of motor be transformed into the pure resistive circuit that energy consumption is economized most.Owing to need not consume reactive power, reactive current is zero, and the circuit total current declines to a great extent, so line loss significantly reduces and all the appliance device ILSs on the motor circuit, the decline of maintenance management expense; Need not reactive power owing to this pure resistive circuit again, thus idle abundant, so voltage is steady, power supply quality improves the product quality raising, product quantity increases.
In starting process and since this province motor advance the phase function, can prune accounts for 80% reactive current and makes the electromagnetic torque multiplication, so the motor Fast starting.Usually fast 60%, active loss of starting time significantly reduces.
In the whole operation process of motor, because consume reactive power not, power rate can reach 100%, thereby exempts from considerable power rate and adjust expense, and can get bonus.
(3) whole to generating-electricity consumption for using the electrical network energy-saving capacity-increasing
The utility model power saving facility have into phase function, appropriate capacitive reactive power can be provided synchronously on the spot, with electrical network reactive capability abundance, voltage drop seldom, thereby need not to obtain reactive power from remote generator, not only make the outer high-voltage fence of the indoor electrical network of electricity consumption, transformer and electricity consumer have energy-conservation; And can give full play to the ability of all power-supply devices on the inside and outside high-low pressure electrical network of transformer and electricity consumer, make its increase-volume on existing equipment capacity basis.Actual motion proves, can increase by 20% capacity usually, and what have can be up to 50%.
(4) high order harmonic component in the electrical network is drawn in suction
It is obviously different that the utility model is economized devices such as motor and frequency modulation machine: in electrical network greatly, polluted by various electromagnetic induction, Blast Furnace Top Gas Recovery Turbine Unit (TRT), non-sinusoidal waveform voltage that frequency modulation machine and various silicon rectifier device produced, endanger all electric equipments of big electrical network.These non-sinusoidal voltages comprise 3 times, 5 times and 7 inferior high order harmonic components, and the power supply fundamental waveform is distorted.The utility model is economized motor and is adopted phase advancer to provide capacitive reactive power to motor, so it is different with the equipment of generation such as frequency modulation machine higher harmonic voltage, not only can not produce high order harmonic component and radio interference to electrical network, and because the inherent characteristic of capacitor, also can inhale and draw the high order harmonic component that produces in the electrical network, make the line voltage wave mode again for sinusoidal wave.
Accompanying drawing 2 is the utility model schematic diagram;
Accompanying drawing 3 is each current phase vectogram of the utility model;
Accompanying drawing 4 is the utility model fundamental diagram.
The utility model comprises gently-heavily loaded conversion equipment ZK, short-circuit protector DZ, overcurrent protector RJ, heavy service device C
0, light running device C
1, phase modulation control device JXK, the limiter DG that shoves, phase advancer C
C, advance to indicate mutually discharger D
3D
4, residual voltage release VR and overvoltage protection device BL.Flow into the three-phase alternating current of weight idling changing device ZK, become at output: one tunnel capacity current I with 90 ° of phase angles of three-phase leading voltage
eFlow into the leading phase operation device, another road lags behind the operation total current I at voltage Ф phase angle with three-phase according to the load current control signal of underloading D2, heavily loaded D1
mSelection is through heavy service device C
0Or light running device C
1Flow into motor.
Three-phase 380V power supply is through light-heavily loaded conversion equipment ZK, and the input of input short-circuit protector DZ, the output of short-circuit protector DZ are connected with the input of overvoltage main protection device BL input, overcurrent protector RJ and phase modulation control device JXK input etc. respectively.Light running device C
1With heavy service device C
0Input is in parallel to be connected with the output of overcurrent protector RJ.Light running device C
1With heavy service device C
0The output parallel connection after be connected with motor.Three the end of a thread of motor are connected to overcurrent protector RJ output (A.B.C), and three line tails of motor are connected to heavy service device C
0Output (X.Y.Z).The output of phase modulation control device JXK is connected with the input of the limiter DG that shoves.Output and the phase advancer C of limiter DG shove
CInput, advance to indicate mutually discharger D
3D
4And the input of residual voltage release VR connects.
Gently, heavily loaded switching controller ZK is made of General Current instrument transformer, signal amplification and output microcomputer integrated device and control switch.Current transformer is made of general mutual inductor, be serially connected on the current circuit, signal amplifies and output microcomputer integrated device is made of general integrated device, control switch is made of the general purpose control switch, relay switch etc. for example, several contacts of control switch are connected respectively to light running device C
1, heavy service device C
0On, when making current signal that current transformer records greater than set point, control switch is connected heavy service device C
0, on the contrary, then connect light running device C
1Short-circuit protector DZ selects general DZ-10 type automatic air circuit breaker for use.Overcurrent protector RJ selects general RJ (0.4KV) type overcurrent thermal relay for use.Light running device C
1And heavy service device C
0Select general CJ (0.4KV) type A.C. contactor for use.Overvoltage protection device BL adopts general BL (0.23KV) type zinc oxide arrester.Phase modulation control device JXK selects general JKG controller for use.The limiter DG that shoves selects the general DG type reactor that shoves for use.Phase advancer C
C1Select general phase shifting capacitor for use.Advance to indicate mutually discharger (D
3, D
4) select general semiconductor indicator light for use.Residual voltage release VR select for use 0.38KV porcelain wire resistor (2K, 20W).
When connecting heavy service device C
0The time, motor MD is the triangular form connection, and the phase voltage of three-phase alternating current (380V) directly is added on each phase coil, and motor MD rotating speed is a rated speed; When connecting the light running device, motor MD is a wye connection, and the phase voltage of three-phase alternating current (380V) is added on the phase coil of two series connection, and the voltage that each phase coil bears only is 220V, and motor MD rotating speed reduces, and reduces energy consumption.
Accompanying drawing 4 is implemented the control electrical schematic diagram for the utility model, at starting switch QA place, is connected with auxiliary relay J, makes auxiliary relay J starting moment, at first connects light running device C
1And make weight carry performer C
0C
1Safe operation.As shown in Figure 3, Figure 4, the course of work of the utility model motor province motor is as follows:
The automatic air circuit breaker DZ that closes presses starting button QA, contactor C
CThe capacity current I that the phase loop stream is crossed 90 ° of phase angles of three-phase leading voltage is advanced in adhesive
C, this electric current is through phase modulation controller CC control, and reactor DG suppresses moment and charges into phase advancer C
C1Shove after, enter phase advancer C
C1
Because contactor C
CAdhesive makes its normally open contact C
CClosed.One auxiliary normally open contact closure plays the self-sustaining effect, and short circuit starting button QA makes auxiliary relay J obtain electricity and weight idling changing device ZK keeps "on" position always in whole service, and this changes the condition that provides for weight idling.In addition auxiliary normally open contact C
CClosure is connected light running device C
1And heavy service device C
0Change required control power supply, guarantee that motor MD has the into capacitive reactive power electric current I at 90 ° of phase angles of phase leading voltage
CStarter motor MD.At this moment, light running device C
1At first adhesive, light running indicator light D
2Bright, motor MD starts under the light running state.When the increase of circuit load electric current, when surpassing set point, weight idling changing device ZK action makes the ZK normally closed interlock disconnect auxiliary relay J dead electricity, light running device C
1Out of service, the moving row of heavy duty device C
0Put into operation, heavily loaded indicator light D1 is bright.When the circuit load electric current was reduced to less than setting value, the normally closed interlock of weight idling changing device ZK was returned closure state, heavy service device C
0Out of service, light running device C
1Put into operation.
The circuit total current I of weight idling changing device ZK and short-circuit protector DZ flows through
o, be divided into two branch roads at the output (U.V.W) of short-circuit protector DZ: the one tunnel is the operation total current I that motor lags behind Ф phase angle in the voltage
MAnother road is the capacity current I at 90 ° of phase angles of leading voltage
CBecause this two branch currents phase phasic difference is very big, thereby synthetic line total current I
OFar below the total I of motor
M, just electric current declines to a great extent.Fig. 3 is each current phase vectogram of the utility model.Its correlation as seen from the figure, and demonstrate the basic principle of economize on electricity.
Be the safety of the equipment and the person, the utility model device residual voltage release VR, to remove phase advancer C
C1On residual voltage, be indication phase advancer C
C1Ruuning situation and quicken to discharge residual voltage, be provided with indicator light (D
3D
4).For removing the phase voltage that is higher than 0.23KV, the external overvoltage protection device BL of phase modulation control device JXK.
Claims (8)
1. a motor is economized motor; comprise light-heavily loaded conversion equipment; short-circuit protector; overcurrent protector; the light running device; the heavy service device; advance the phase control device; limiter shoves; phase advancer; overvoltage protection device and residual voltage release; it is characterized in that: the three-phase alternating current that flows into weight idling changing device; become at output: one tunnel capacitive electricity electric current with 90 ° of phase angles of three-phase leading voltage flows into the leading phase operation device, and another road is according to light; the load current control signal of heavy duty is selected to flow into motor through heavy service device or light running device with the operation total current that three-phase lags behind voltage Ф phase angle.
2. motor according to claim 1 is economized motor; it is characterized in that light-heavily loaded conversion equipment is connected with the input of short-circuit protector; the output of short-circuit protector and overcurrent protector; the input of overvoltage protection device and phase modulation control device three devices connects; the input of light running device and heavy service device two devices and connect the back be connected with the output of overcurrent protector; the light running device is connected with motor with heavy service device output and after connecing; the output of phase modulation control device is connected with the limiter input that shoves; the output and the phase advancer of limiter shove; advance to indicate mutually discharger and residual voltage release to connect; the control power supply is a three phase mains, divides to be connected to the short-circuit protector input.
3. motor according to claim 1 is economized motor, it is characterized in that on the circuit of supply motor power supply device light-heavily loaded conversion equipment, the output of light-heavily loaded conversion equipment connects short-circuit protector.
4. motor according to claim 1 is economized motor; it is characterized in that being connected with the overcurrent protector output after the input parallel connection of light running device and heavy service device, and be connected with motor after the output parallel connection of light running device output and heavy service device.
5. motor according to claim 1 is economized motor, it is characterized in that the input of phase modulation control device, both is connected with the output of short-circuit protection, is connected with the input of overcurrent protector and the input of overvoltage protection device again.
6. motor according to claim 1 is economized motor; the input (O.P.Q) that it is characterized in that short-circuit protector is for economizing the input three phase mains of motor control circuit; input three the end of a thread (A.B.C) of motor are connected between overcurrent protector and the heavy service device, and three line tails of motor (X.Y.Z) then are connected between heavy service device and the light running device.
7. motor according to claim 1 is economized motor, the input of limiter of it is characterized in that shoving is connected with the output of phase modulation control device, the shove output and the phase advancer input of limiter advance to indicate mutually three devices such as discharger input and residual voltage release input to connect.
8. motor according to claim 1 is economized motor, it is characterized in that light, heavily loaded switching controller is amplified by current transformer, signal and output microcomputer integrated device control switch constitutes, the General Current instrument transformer is made of general mutual inductor, be serially connected on the current circuit, control switch is made of the general purpose control switch, relay switch etc. for example, the microcomputer integrated device selects for use several contacts of general single board computer control switch to be connected respectively on light running device, the heavy service device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN01242985U CN2540701Y (en) | 2001-08-03 | 2001-08-03 | Electric saving machine for motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN01242985U CN2540701Y (en) | 2001-08-03 | 2001-08-03 | Electric saving machine for motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2540701Y true CN2540701Y (en) | 2003-03-19 |
Family
ID=33654658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN01242985U Expired - Fee Related CN2540701Y (en) | 2001-08-03 | 2001-08-03 | Electric saving machine for motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2540701Y (en) |
-
2001
- 2001-08-03 CN CN01242985U patent/CN2540701Y/en not_active Expired - Fee Related
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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 |