CN2527033Y - Energy-saving running apparatus for motor - Google Patents
Energy-saving running apparatus for motor Download PDFInfo
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- CN2527033Y CN2527033Y CN 01242986 CN01242986U CN2527033Y CN 2527033 Y CN2527033 Y CN 2527033Y CN 01242986 CN01242986 CN 01242986 CN 01242986 U CN01242986 U CN 01242986U CN 2527033 Y CN2527033 Y CN 2527033Y
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Abstract
A motor energy saving operation device is characterized in that: the output end of a short circuit protector and the output end of a load current are connected with the input end of a light-heavy load conversion apparatus; the output end of the light-heavy load conversion apparatus is connected with the input ends of an inlet-phase operation apparatus, a heavy load operation apparatus and a light load operation apparatus; the output end of the inlet-phase operation apparatus is connected with the input ends of a residual pressure releasing apparatus, an inrush current limiting apparatus and a over-voltage protecting apparatus; the output end of the inrush current limiting apparatus is connected with the inlet-phase apparatus; the output ends of the light load operation apparatus and the heavy load operation apparatus is connected with the motor through a motor over current thermal relay. The light load operation apparatus consists of a light load operation apparatus 1, a voltage-reducing apparatus and a light load operation apparatus 2. The input end of the light load operation apparatus 1 is connected with the output end of the light-heavy conversion apparatus and the output end of the light load operation apparatus is connected with the input end of the voltage-reducing apparatus. The utility model realizes the conversion between light load and heavy load, which can substantially save energy in the operation process of motor.
Description
Technical field
The utility model belongs to a kind of energy-saving run device that is applied to alternating current motor.
Background technology
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 determine that its asynchronous speed has also just been determined for certain number of pole-pairs motor.And power output is with rotation speed change.Just, to a certain set rotating speed, the power of motor output is constant to same loadtype.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 motor rotary speed when underloading, thereby reduce power output, to save the energy.In fact, when underloading, mechanical load does not need the big power of motor output yet.For example, in sawmill, when not sawmilling, motor just drags saw disc idle running, for saving the energy, requires this moment motor to reduce power output.At brick field, Shi Chang, when not cutting the base brick or not during rubble, motor only drags the conveyer belt rotation, wastes many energy, requires this moment motor to slow down to reduce power output.In the waterworks, when pipeline hydraulic pressure reaches certain pressure, also require the motor reduction of speed, reduce power output.This can save the energy on the one hand, prevents that on the other hand pipeline is owing to high pressure damages.
When realizing this purpose, the past people 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, change its rotating speed, is very difficult to adapt to various loads and operating mode.At present, the most fruitfully to calculate frequency modulation machine.Though frequency modulation machine energy stepless speed control, in broad range, reduce power output, but in order to change supply frequency, realize the transformation of energy cycle, must make the energy convert DC power supply to through silicon rectifier device from the alternating current of 50 cycles, and from the more low-frequency AC power of dc inverter one-tenth, twice energy transformation of different nature.Each energy conversion must be brought considerable energy loss.Like this, the power of reality saving and imperfect; And, only be to reduce power output, can not under same rotating speed, accomplish real energy-conservation.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 pollution, all electric equipments in the harm electrical network, also radio is produced and disturb, influence the accuracy that Thermal Meter, communication apparatus, medicine equipment and control panel etc. are measured, controlled.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 utility model content
The purpose of this utility model is to provide a kind of motor energy-saving appliance of architecture advances, so that reduce the power output of motor significantly when underloading, also can reduce the power output of motor when reaching heavy duty.
The utility model is achieved 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 selected to flow into motor through heavy service device or light running device with the operation total current that three-phase lags behind voltage φ phase angle according to light, heavily loaded load current control signal.
The utility model comprises short-circuit protector, weight idling changing device, heavy service device, light running device 1, light running device 2, reducing transformer, motor overcurrent thermal relay, underloading overcurrent thermal relay, leading phase operation device, the limiter that shoves, phase advancer, residual voltage release and overvoltage protection device.The output of short-circuit protector, load current is connected with the input of weight idling changing device; the output of weight idling changing device taps into the input of phase performer, heavy service device, light running device; the input of the output termination residual voltage release of leading phase operation device, the limiter that shoves, overvoltage protection device; the output of limiter of shoving connects phase advancer, and output light, the heavy service device is connected with motor through motor overcurrent thermal relay.The light running device is made of light running device 1, reducing transformer, light running device 2, the output of the input termination weight idling changing device of light running device 1, the input of its output termination reducing transformer, the input of the output termination light running device 2 of reducing transformer, the output of light running device joins through underloading overcurrent thermal relay and motor.
The utlity model has following characteristics:
(1) idling of realization weight is changed
When the motor heavy service, because weight idling changing device function, the utility model forwards operation under the heavy condition automatically fast to.This moment, the heavy service device put into operation, and light running device 1 and 2 cuts out operation, motor output this moment rated power.
Be lower than setting value when following in motor load, weight idling changing device switches to the light running state fast.At this moment, light running device 1 and 2 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 relies on weight idling changing device when light running, motor is positioned at the operation of light running device, and active power of output reduces.The amplitude that experiment showed, the active power minimizing is bigger, can be up to 60%.For example, the disintegrating machine of 30KW, when motor only spurs conveyer belt idle running and not during rubble, consumed power 8.8KW, when being positioned at light running device 1 and 2 operations, meritorious consumption has only 3.6KW, falls 5.2KW.
The utility model motor energy-saving run device returning apparatus phase advancer provides the capacity current at appropriate 90 ° of phase angles of leading voltage for motor synchronously on the spot, 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 appliance device ILSs on the motor circuit, the decline of maintenance management expense.Again because this pure resistive circuit need not reactive power, thus idle abundant, and voltage is steady, so power supply quality improves, product quality improves, product quantity increases.
In the process of starting, owing to of the present utility modelly advance the phase function, can prune accounts for 80% reactive current and makes the electromagnetic torque multiplication, so the motor Fast starting.Usually the starting time fast 60%, active power loss significantly reduces.
In the whole operation process of motor, owing to do not consume no kinetic power, power rate can reach 100%, thereby exempts from considerable power rate and adjust expense, and gold also can receive awards.
(3) whole to generating-electricity consumption for using the electrical network energy-saving capacity-increasing
The utlity model has into phase function, the capacitive reactive power electric current at appropriate 90 ° of phase angles of leading voltage can be provided synchronously on the spot, abundant with power system reactive power, voltage drop seldom thereby need not to send 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 (as stage transformers, generator etc.) on the inside and outside high-low pressure electrical network of transformer and electricity consumer, make it former by the capacity increase-volume of the shared tool of reactive power.Actual motion proves, can increase the capacity about 20% usually, and what have can be up to 50%.
(4) high order harmonic component in the electrical network is drawn in suction
Frequency modulation machine of the present utility model etc. devices is obviously different: in big electrical network, 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 does not have silicon rectifier device, but adopt 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 power supply keep sinusoidal wave.
Description of drawings
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 embodiment fundamental diagram.
Embodiment
As shown in Figure 1 and Figure 2; the utility model comprise short-circuit protector ZK, weight idling changing device FZK, heavy service device C0, motor overcurrent thermal relay RJ, light running device (C1, C2), reducing transformer ZB, underloading overcurrent thermal relay RJ1, leading phase operation device CC, the limiter LG that shoves, phase advancer CC1, standby phase advancer CC2, residual voltage release FDR and overvoltage protection device GV.
Short-circuit protector ZK output is connected with the input of weight idling changing device FZK; the output of weight idling changing device FZK taps into phase performer CC, heavy service device C0, light running device (C1; C2) input; the output termination residual voltage release FDR of leading phase operation device CC, the input of the limiter LG that shoves, overvoltage protection device GV; the output of limiter LG of shoving meets phase advancer CC1; gently, heavy service device (C0; C1, output C2) is connected with motor D through motor overcurrent thermal relay RJ.
The light running device is made of light running device 1 (C1), reducing transformer ZB, light running device 2 (C2), the output of the input termination weight idling changing device FZK of light running device 1 (C1), the input of output termination reducing transformer ZB, the input of the output termination light running device 2 (C2) of reducing transformer ZB, the output of light running device 2 (C2) joins through underloading overcurrent thermal relay RJ1 and motor D.
Short-circuit protector ZK adopts general DZ type (0.4KV) automatic air circuit breaker, and heavy service device C0 selects general CJ type (0.4KV) A.C. contactor for use.Motor overcurrent thermal relay RJ selects general RJ type (0.4KV) thermal relay for use.Light running device C1 and C2 select CJ type (0.4KV) A.C. contactor for use.Reducing transformer ZB selects general ZB self coupling reducing transformer (0.4KV) for use.Underloading overcurrent thermal relay RJ1 selects general RJ type (0.4KV) thermal relay for use.Leading phase operation device CC selects the A.C. contactor of general CJ type (0.4KV) for use.The limiter LG that shoves selects general AC reactor for use.Phase advancer CC1 selects general phase shift power capacitor for use.Residual voltage release FDR selects general porcelain wire resistor ZK, 20WZK for use.Overvoltage protection device GV selects general zinc oxide arrester for use.
Weight idling changer controller FZK is by the signal code instrument transformer, signal amplifies and output microcomputer integrated device and control switch formation, the signal code instrument 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 1 (C1), on the heavy service device (C0), the current signal that records when current transformer is during greater than set point, control switch is connected heavy service device C0, on the contrary, then connect light running device 1 (C1).
Accompanying drawing 4 is the utility model embodiment fundamental diagram, at starting switch QA place, is connected with auxiliary relay J, makes auxiliary relay start moment, at first connects the safe operation that light running device and protection weight carry performer.As shown in Figure 4, the course of work of the present utility model 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 the control of phase modulation controller, and reactor DG suppresses moment and charges into phase advancer C
CShove after, enter phase advancer.
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, the into capacitive reactive power electric current ability starter motor at 90 ° of phase angles of phase leading voltage is arranged to guarantee motor.At this moment, light running device C
1At first adhesive, light running indicator light D
2Bright, motor 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, heavy service device C
0Put heavily loaded indicator light D into operation
1Bright.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., 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 voltage φ phase angle
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 motor total current I
M, just electric current declines to a great extent.Fig. 3 is each current phase vectogram of the utility model.Visible its correlation among 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
COn residual voltage.Be indication phase advancer C
CRuuning situation and quicken to discharge residual voltage, be provided with indicator light D
3D
4For removing the phase voltage that is higher than 0.23KV, installed overvoltage protection device BL.
Claims (6)
1. motor energy-saving run device; comprise short-circuit protector; weight idling changing device; the heavy service device; the light running device; reducing transformer; motor overcurrent thermal relay; underloading overcurrent thermal relay; the leading phase operation device; limiter shoves; phase advancer; residual voltage release and overvoltage protection device; it is characterized in that flowing into the three-phase alternating current of 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 φ phase angle.
2. motor energy-saving run device according to claim 1 is characterized in that establishing reducing transformer in the light running device.
3. motor energy-saving run device according to claim 1 is characterized in that comprising short-circuit protector, weight idling changing device, heavy service device, light running device 1, light running device 2, reducing transformer, motor overcurrent thermal relay, underloading overcurrent thermal relay, leading phase operation device, the limiter that shoves, phase advancer, residual voltage release and overvoltage protection device.The output of short-circuit protector, load current is connected with the input of weight idling changing device; the output of weight idling changing device taps into the input of phase performer, heavy service device, light running device; the input of the output termination residual voltage release of leading phase operation device, the limiter that shoves, overvoltage protection device; the output of limiter of shoving connects phase advancer, and output light, the heavy service device is connected with motor through motor overcurrent thermal relay.The light running device is made of light running device 1, reducing transformer, light running device 2, the output of the input termination weight idling changing device of light running device 1, the input of its output termination reducing transformer, the input of the output termination light running device 2 of reducing transformer, the output of light running device joins through underloading overcurrent thermal relay and motor.
4. according to claim 2 or 3 described motor energy-saving run devices, it is characterized in that the light running device is made of light running device 1, reducing transformer, light running device 2, the output of the input termination weight idling changing device of light running device 1, the input of its output termination reducing transformer, the input of the output termination light running device 2 of reducing transformer, the output of light running device joins through underloading overcurrent thermal relay and motor.
5. motor energy-saving run device according to claim 1, it is characterized in that weight idling changer controller FZK is made of signal code instrument transformer, signal amplification and output microcomputer integrated device and control switch, the signal code instrument 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, and several contacts of control switch are connected respectively on light running device 1 (C1), the heavy service device (C0).
6. according to claim 3 or 4 described motor energy-saving run devices; it is characterized in that short-circuit protector ZK adopts general DZ type automatic air circuit breaker; heavy service device C0 selects general CJ type A.C. contactor for use; motor overcurrent thermal relay RJ selects general RJ type thermal relay for use; light running device C1 and C2 select CJ type A.C. contactor for use; reducing transformer ZB selects general ZB self coupling reducing transformer for use; underloading overcurrent thermal relay RJI selects general RJ type thermal relay for use; leading phase operation device CC selects the A.C. contactor of general CJ type for use; the limiter LG that shoves selects general AC reactor for use, and phase advancer CC1 selects general phase shift power capacitor for use.Residual voltage release FDR selects general porcelain wire resistor ZK for use, and overvoltage protection device GV selects general zinc oxide arrester for use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01242986 CN2527033Y (en) | 2001-08-03 | 2001-08-03 | Energy-saving running apparatus for motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01242986 CN2527033Y (en) | 2001-08-03 | 2001-08-03 | Energy-saving running apparatus for motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2527033Y true CN2527033Y (en) | 2002-12-18 |
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ID=33654659
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01242986 Expired - Fee Related CN2527033Y (en) | 2001-08-03 | 2001-08-03 | Energy-saving running apparatus for motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2527033Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100340058C (en) * | 2005-04-01 | 2007-09-26 | 上海匣承机电科技有限公司 | Three-phase AC. electric motorelectricity-saver |
| CN108809186A (en) * | 2018-07-05 | 2018-11-13 | 珠海格力电器股份有限公司 | Motor control method and system for realizing load running state judgment |
-
2001
- 2001-08-03 CN CN 01242986 patent/CN2527033Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100340058C (en) * | 2005-04-01 | 2007-09-26 | 上海匣承机电科技有限公司 | Three-phase AC. electric motorelectricity-saver |
| CN108809186A (en) * | 2018-07-05 | 2018-11-13 | 珠海格力电器股份有限公司 | Motor control method and system for realizing load running state judgment |
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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 |