CN2552253Y - Domestic electrical appliance driving system - Google Patents
Domestic electrical appliance driving system Download PDFInfo
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- CN2552253Y CN2552253Y CN 02220614 CN02220614U CN2552253Y CN 2552253 Y CN2552253 Y CN 2552253Y CN 02220614 CN02220614 CN 02220614 CN 02220614 U CN02220614 U CN 02220614U CN 2552253 Y CN2552253 Y CN 2552253Y
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Abstract
The utility model relates to a drive system for a household electrical appliance. The drive system consists of a single-phase commutating circuit, a filter circuit, a three-phase inverting circuit, and a digital signal processor. The input of the single-phase commutating circuit is connected with the 220V commercial power, and the output is connected with the filter circuit. The output of the filter circuit is connected with the power output of the three-phase inverting circuit, the control input of the three-phase inverting circuit is connected with the digital signal processor, and the output of the three-phase inverting circuit is connected with the three-phase electromotor. The utility model uses a three-phase AC asynchronous electromotor as the transmission core, a capacitor is not required to start necessarily any more, and the cost is lowered greatly. Since the utility model adopts the normalized full-bridge commutation, the power factor flowing to the electrical source system is 1, and the current can be reduced greatly. In addition, since the utility model system adopts an effective three-phase symmetrical three-phase AC asynchronous electromotor, the average efficiency can reach 80 percent above. In the system of the utility model, the design is based on the computer control system, more convenient ports are added to benefit the realization of the modernization of the furniture.
Description
Technical field
The utility model relates to a kind of drive system of household electrical appliance.
Background technology
At present, drive system for household appliances all exists defectives such as poor efficiency, power consumption, volume be big.Advanced several years, because the bigger household electrical appliance of power enter family's (domestic air conditioning, washing machine, refrigerator, fan etc.), the poor efficiency of drive system for household appliances, power consumption, bulky defective are just more obvious.Traditional household electrical appliance are owing to exist the startup winding and start electric capacity, therefore no matter from the production angle still from user perspective, efficiency of motor is all lower, because existing household electrical appliance all adopt monophase machine, and monophase machine is because what use is non-circular rotating field, so efficient is lower, on average reaches 50% just pretty good, therefore caused a large amount of energy wastes, must tackle the problem at its root.
Summary of the invention
The purpose of this utility model is exactly in order to address the above problem, and a kind of efficient, low power consuming, drive system for household appliances that volume is little are provided.
Technical solution of the present utility model:
A kind of drive system for household appliances, it is characterized in that it is become by single phase rectifier circuit, filter circuit, three-phase inverting circuit and bank of digital signal processors, the input of single phase rectifier circuit connects the 220V civil power, its output connects filter circuit, the output of filter circuit connects the power input of three-phase inverting circuit, the control input of three-phase inverting circuit links to each other with digital signal processor, and the output of three-phase inverting circuit connects three phase electric machine.
The utility model after full-bridge rectification, obtains four wave head direct voltages of a pulsation for single-phase 220 (V)/50 (Hz) power supplys of family expenses, through after the filtering, forms stable, a clean direct current potential source.This galvanic current potential source is applied on the full control switch bridge network, produce switching signal with certain rule by computer control system, control the switching of six switching tubes, form three symmetrical three phase mains in output end of switching tube, this three phase mains is matched with specific type of electric machine, form the driving power system of household electrical appliance.The utility model solved contain a large amount of harmonic waves in the distorted waveform that produces in the compensation, the inverter course of work of the non-linear action of the rectifying device when exchange conversion is direct current, to according to very unfavorable etc. the difficult point of the operation of the threephase asynchronous machine of 50 (Hz) optimal design, the power application electronic technology is transformed to novel three-phase alternating current system to family expenses single phase poaer supply system, can use three phase alternating current motor on household electrical appliance.Mainly be that the reactive power of the switch motion order of control system, the nonlinear compensation of rectifying part, threephase asynchronous machine (synchronous machine) operation produces, the protection of the abnormal condition when working from content.The utility model is owing to used ac three-phase asynchronous motor as the transmission core, so no longer need to start electric capacity, three sample household electrical appliance are used with one family in the whole nation, and the fund of saving is very considerable; Secondly, in novel household electrical equipment drive system, owing to used normalized full-bridge rectification, so flowing to the power factor of power-supply system is 1, if the average power factor of originally single-phase household electrical appliance is 0.75, then owing to the use of novel household electrical equipment drive system, electric current will descend greatly; Moreover the utility model system is owing to used efficiently three symmetrical ac three-phase asynchronous motors, and its average efficiency can reach more than 80%.At last, in system of the present utility model, owing to be based on computer control system, therefore increase more Convenient interface in design, be of value to the modern realization of household.
Description of drawings
Fig. 1 is a theory diagram of the present utility model.
Fig. 2 is a single phase rectifier circuit electrical schematic diagram of the present utility model.
Fig. 3 is a filter circuit electrical schematic diagram of the present utility model.
Fig. 4 is a three-phase inverting circuit electrical schematic diagram of the present utility model.
Fig. 5 is a digital signal processor electrical schematic diagram of the present utility model.
Embodiment
As Fig. 1, drive system for household appliances of the present utility model is become by single phase rectifier circuit, filter circuit, three-phase inverting circuit and bank of digital signal processors, the input of single phase rectifier circuit connects the 220V civil power, its output connects filter circuit, the output of filter circuit connects the power input of three-phase inverting circuit, the control input of three-phase inverting circuit links to each other with digital signal processor, and the output of three-phase inverting circuit connects three phase electric machine.
In the utility model, single phase rectifier circuit as shown in Figure 2, it can be made of the bridge rectifier net that rectifying tube D1-D4 forms, and the input of bridge rectifier net links to each other with the 220V civil power, and its output is that direct current positive bus output P and direct current negative busbar output N connect filter circuit.The tie lines form of above-mentioned bridge rectifier net can the T type, and also semi-bridge type is preferably H type (being the H type among Fig. 2).
Rectifying tube D1-D4 in the single phase rectifier circuit also can constitute the bridge rectifier net by full-controlled switch device GTR, or constitutes the bridge rectifier net by half control type switching device (as controllable silicon SCR etc.).
For the harmonic content that reduces the bridge rectifier net and reduce the distortion of DC bus-bar voltage, each rectifying tube D1-D4 two ends that can be in the bridge rectifier net respectively and meet a diode non-linear compensator B1-B4 (model all can be KC004).
In order to guarantee that the civil power inlet wire does not cause interference to the utility model system; and the normal operation that guarantees the utility model system; can set up inlet wire filter A (model can be GL) and incoming relay-protection device C (model can be MY) in the input of bridge rectifier net; 220V civil power live wire end links to each other with the input of inlet wire filter A; link to each other with the input of incoming relay-protection device C simultaneously; the ground terminal of civil power links to each other with another input of incoming relay-protection device C, and the output of inlet wire filter A and incoming relay-protection device C links to each other with the input of bridge rectifier network.
The filter circuit of the utility model system as shown in Figure 3, it can directly adopt a jumbo electrochemical capacitor of high pressure low-loss to constitute, its input links to each other with direct current negative busbar output N with the direct current positive bus output P of single phase rectifier circuit respectively, and its output is that direct current positive bus output P1 links to each other with three-phase inverting circuit with direct current negative busbar output N1.
Get the short circuit phenomenon of electric moment for fear of big capacity electrochemical capacitor, can be connected in series a current limliting network at its input, this current limliting network is made up of the normally opened contact J1 of filter inductance L, current-limiting resistance R and control contactor J (model can be CJ-100), wherein filter inductance L and current-limiting resistance R series connection, the normally opened contact J1 of control contactor J and current-limiting resistance R also connect.The line bag of this control contactor J connects the interface control signal of digital signal processor.This control contactor J also can adopt other switch element to realize, as full-controlled switch device GTR or such as the half control type switching device of controllable silicon SCR.
For each switch brachium pontis in the three-phase inverting circuit that guarantees level behind the filter circuit can work alone, reduces production costs and obtain an artificial neutral point, can adopt two the big capacity electrochemical capacitor of low pressure C1, C2 serial connections to replace an aforesaid high-voltage large-capacity electrochemical capacitor together.In order to guarantee that C1, C2 can divide equally the voltage between filter circuit output P1, N1, can be at the two ends of C1, C2 respectively and connect a voltage-equalizing control circuit, voltage-equalizing control circuit can be made up of resistance R 1 and R2, and voltage-equalizing control circuit also can adopt the quick voltage stabilizing didoe of high pressure anti-and connect formation.
The three-phase inverting circuit of the utility model system as shown in Figure 4, it can be made of six high power transistor Q1-Q6, Q1 wherein, Q3, Q5 respectively with Q4, Q6 and Q2 are made into three brachium pontis, the anode of three brachium pontis is Q1, Q3, the input that the collector electrode of Q5 connects as three-phase inverting circuit links to each other with the direct current positive bus output P1 of filter circuit, the negative terminal of three brachium pontis is Q4, Q6, another input that the emitter of Q2 connects as three-phase inverting circuit links to each other with the direct current negative busbar output N1 of filter circuit, and in addition six inputs of three-phase inverting circuit are from the base stage (H1 of crystal Q1-Q6, H2, H3, H4, H5, H6) draw and connect digital signal processor.The tie point of three brachium pontis (being the tie point of Q1 and Q4, the tie point of tie point, Q5 and the Q2 of Q3 and Q6) just links to each other with the excitation end of three phase electric machine M respectively as the output of three-phase inverting circuit.The operating voltage grade of three phase electric machine M is special, and it and single phase rectifier circuit are complementary, and three phase electric machine M can adopt threephase asynchronous machine, also can adopt three-phase synchronous motor, or the three-phase direct-current brushless motor.
Three-phase inverting circuit also can adopt insulating gate type bipolar transistor (IGBT) or metallic oxide/semiconductor field-effect tube (MOSFET) to constitute.
For the electric current that guarantees to flow through motor windings torque interrupted, that motor produces continuous, can be between the collector and emitter of each transistor Q1-Q6 all anti-and meet a fast recovery diode FD1-FD6 (model can be IR2001).
In the switch motion that guarantees each transistor Q1-Q6; be unlikely to produce excessive current changing rate and voltage change ratio; can be between the collector and emitter of each transistor Q1-Q6 all and meet a dynamic current protector PT1-FT6, this protector circuit can adopt the conventional SNUBBER circuit that is made of resistance, electric capacity, inductance, diode.
In order to reduce the cost of three-phase inverting circuit, can between the direct current negative busbar output N1 of the negative terminal of three brachium pontis and filter, be connected in series a current sensor CT1 (CT100), the output termination digital signal processor of this current sensor CT1.
For three-phase inverting circuit is carried out voltage protection, can and meet a voltage sampling circuit VT1 (model can be YH002) between the positive and negative end of three brachium pontis, the output of VT1 connects digital signal processor.
The digital signal processor of the utility model drive system as shown in Figure 5, it can be made of special digital signal processing integrated circuit DSP (model can be TMS320C24X) and peripheral circuit, the input of DSP connects the output of modulus converter A/D (model can be ADC0809), A/D is input as the required various analog quantitys of system works, as temperature signal, tach signal etc., so that DSP is carried out initializing set.The output of DSP drives amplifying circuit (model can be EX841) by Signal Spacing and links to each other with the base stage (H1, H2, H3, H4, H5, H6) of six transistor Q1-Q6 in the three-phase inverting circuit.The I/O end of DSP links to each other with the line bag of control contactor J in the filter circuit by external interface circuit.Another I/O end of DSP also links to each other by the output of the current sensor CT1 in external interface circuit and the three-phase inverting circuit and the output of voltage sensor VT1.The output of DSP connects display (model can be WLG) by D/A converting circuit D/A (model can be DAC0832).
The digital signal processor of the utility model system also can be realized by large scale integrated circuit HEF4752 or SEL4520.
The course of work of the utility model drive system for household appliances is as follows: when system inserts the 220V civil power, the single phase rectifier circuit D1-D4 of system starts working, it is transformed into one or four wave head Rectified alternating current potential sources with the mains supply of 220 (V)/50 (Hz), the direct current positive bus end of this power supply is P, direct current negative busbar end is N, they deliver to the input of filter circuit, the direct voltage source that after its effect, is transformed to stably, has certain load capacity, the direct current positive bus end of this power supply is P1, and direct current negative busbar end is N1.The control of the current limliting network in the filter circuit course of work is by digital signal processor DSP control output.Steady direct voltage source P1, the N1 of filter circuit output deliver to three-phase inverting circuit, the work of three-phase inverting circuit is controlled by digital signal processor DSP, it sends control signal clocklike interior staying under the software control to the base stage of six power transistor Q1-Q6, make three-phase inverting circuit export three symmetrical three phase mains, drive three phase electric machine M work, this three phase electric machine M is the machine power supplier of household electrical appliance.
Simultaneously, the associated voltage transducer VT1 of three-phase inverting circuit and current sensor CT1 are sent to digital signal processor DSP with the real-time current voltage in the course of work, are judged by DSP, so that household electrical appliance are protected.
Because the utility model system has adopted efficient modulation control technology and high frequency switching device, make that system's own loss is very little, and since system output be three-phase symmetrical power, so can in the air gap of three phase electric machine, form symmetrical circular magnetic field, overcome the oval magnetic field of monophase machine, the service efficiency in magnetic field is improved greatly.And because the utility model system adopted the single-phase full bridge rectification circuit, so power factor is essentially 1, overcome the defective of monophase machine low power factor.
Claims (10)
1, a kind of drive system for household appliances, it is characterized in that it is become by single phase rectifier circuit, filter circuit, three-phase inverting circuit and bank of digital signal processors, the input of single phase rectifier circuit connects the 220V civil power, its output connects filter circuit, the output of filter circuit connects the power input of three-phase inverting circuit, the control input of three-phase inverting circuit links to each other with digital signal processor, and the output of three-phase inverting circuit connects three phase electric machine.
2, by the described drive system for household appliances of claim 1, it is characterized in that described single phase rectifier circuit is made of the bridge rectifier net that rectifying tube D1-D4 forms, the input of bridge rectifier net links to each other with the 220V civil power, its output is that direct current positive bus output P and direct current negative busbar output N connect filter circuit, the tie lines form of above-mentioned bridge rectifier net or T type, or semi-bridge type, or H type.
3,, it is characterized in that described single phase rectifier circuit is made up of the bridge rectifier net that full-controlled switch device GTR constitutes, or form by the bridge rectifier net that half control type switching device constitutes by the described drive system for household appliances of claim 2.
4, by the described drive system for household appliances of claim 2, it is characterized in that in the bridge rectifier net each rectifying tube D1-D4 two ends respectively and meet a diode non-linear compensator B1-B4; Set up inlet wire filter A and incoming relay-protection device C in the input of bridge rectifier net; 220V civil power live wire end links to each other with the input of inlet wire filter A; link to each other with the input of incoming relay-protection device C simultaneously; the ground terminal of civil power links to each other with another input of incoming relay-protection device C, and the output of inlet wire filter A and incoming relay-protection device C links to each other with the input of bridge rectifier network.
5, by the described drive system for household appliances of claim 1, it is characterized in that described filter circuit directly adopts a jumbo electrochemical capacitor of high pressure low-loss to constitute, its input links to each other with direct current negative busbar output N with the direct current positive bus output P of single phase rectifier circuit respectively, and its output is that direct current positive bus output P1 links to each other with three-phase inverting circuit with direct current negative busbar output N1.
6, by the described drive system for household appliances of claim 5, it is characterized in that being connected in series a current limliting network at the filter circuit input, this current limliting network is made up of the normally opened contact J1 of filter inductance L, current-limiting resistance R and control contactor J, wherein filter inductance L and current-limiting resistance R series connection, the normally opened contact J1 of control contactor J and current-limiting resistance R also connect, and the line bag of this control contactor J connects the interface control signal of digital signal processor; This control contactor J or adopt other switch element to realize.
7, by the described drive system for household appliances of claim 5, it is characterized in that adopting two the big capacity electrochemical capacitor of low pressure C1, C2 serial connections to replace a high-voltage large-capacity electrochemical capacitor together, at the two ends of C1, C2 respectively and connect a voltage-equalizing control circuit, voltage-equalizing control circuit or form by resistance R 1 and R2, or adopt the quick voltage stabilizing didoe of high pressure anti-and connect formation.
8, by the described drive system for household appliances of claim 1, it is characterized in that described three-phase inverting circuit is made of six high power transistor Q1-Q6, Q1 wherein, Q3, Q5 respectively with Q4, Q6 and Q2 are made into three brachium pontis, the anode of three brachium pontis is Q1, Q3, the input that the collector electrode of Q5 connects as three-phase inverting circuit links to each other with the direct current positive bus output P1 of filter circuit, the negative terminal of three brachium pontis is Q4, Q6, another input that the emitter of Q2 connects as three-phase inverting circuit links to each other with the direct current negative busbar output N1 of filter circuit, six inputs in addition of three-phase inverting circuit are drawn from the base stage of crystal Q1-Q6 and are connect digital signal processor, the Q1 of three brachium pontis and the tie point of Q4, the tie point of the tie point of Q3 and Q6 and Q5 and Q2 just links to each other with the excitation end of three phase electric machine M respectively as the output of three-phase inverting circuit; Three phase electric machine M or employing threephase asynchronous machine, or adopt three-phase synchronous motor, or be the three-phase direct-current brushless motor.
9,, it is characterized in that between the collector and emitter of each transistor Q1-Q6 all anti-and meet a fast recovery diode FD1-FD6 by the described drive system for household appliances of claim 8; Between the collector and emitter of each transistor Q1-Q6 all and meet a dynamic current protector PT1-PT6; Between the direct current negative busbar output N1 of the negative terminal of three brachium pontis and filter, be connected in series a current sensor CT1, the output termination digital signal processor of this current sensor CT1; Between the positive and negative end of three brachium pontis and meet a voltage sampling circuit VT1, the output of VT1 connects digital signal processor.
10, by the described drive system for household appliances of claim 1, it is characterized in that described digital signal processor is made of special digital signal processing integrated circuit DSP and peripheral circuit, the input of DSP connects the output of modulus converter A/D, A/D is input as the required various analog quantitys of system works, the output of DSP drives amplifying circuit by Signal Spacing and links to each other with the base stage of six transistor Q1-Q6 in the three-phase inverting circuit, the I/O end of DSP links to each other with the line bag of control contactor J in the filter circuit by external interface circuit, another I/O end of DSP also links to each other by the output of the current sensor CT1 in external interface circuit and the three-phase inverting circuit and the output of voltage sensor VT1, and the output of DSP connects display by D/A converting circuit D/A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02220614 CN2552253Y (en) | 2002-05-17 | 2002-05-17 | Domestic electrical appliance driving system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02220614 CN2552253Y (en) | 2002-05-17 | 2002-05-17 | Domestic electrical appliance driving system |
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| Publication Number | Publication Date |
|---|---|
| CN2552253Y true CN2552253Y (en) | 2003-05-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02220614 Expired - Fee Related CN2552253Y (en) | 2002-05-17 | 2002-05-17 | Domestic electrical appliance driving system |
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| CN (1) | CN2552253Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105958878A (en) * | 2016-06-24 | 2016-09-21 | 南京工程学院 | Speed regulation apparatus and method for digitized thyristor direct current motor |
| CN110061679A (en) * | 2019-05-31 | 2019-07-26 | 西安石油大学 | A kind of Intelligent frequency conversion speed adjusting device and its control method suitable for pulse-type load |
-
2002
- 2002-05-17 CN CN 02220614 patent/CN2552253Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105958878A (en) * | 2016-06-24 | 2016-09-21 | 南京工程学院 | Speed regulation apparatus and method for digitized thyristor direct current motor |
| CN105958878B (en) * | 2016-06-24 | 2019-03-22 | 南京工程学院 | A kind of digitlization thyristor dc motor speed control device and method |
| CN110061679A (en) * | 2019-05-31 | 2019-07-26 | 西安石油大学 | A kind of Intelligent frequency conversion speed adjusting device and its control method suitable for pulse-type load |
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| 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 |